AND METHOD FOR USING SAME

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

[0001] This application claims the benefit of priority under 35 U.S.C. § 119 of U.S.

Provisional Serial No. 63/104563 filed on October 23, 2020, the content of which is relied upon and incorporated herein by reference in its entirety.

TECHNICAL FIELD

[0002] The present specification generally relates to filter regeneration apparatuses and methods for regenerating a plurality of filters and, more specifically, filter regeneration apparatuses and methods for removing particulate matter from filters by submerging the filters in at least one solution and blowing pressurized gas onto the filters.

BACKGROUND

[0003] Finding an appropriate way to regenerate filters can be very challenging. Ideal regeneration should be cost-effective while capable of recovering most filter performance. Conventional approaches for filter regeneration include fuel combustion, which is suitable for use in regenerating diesel particulate filters. Additionally, conventional approaches for washing filters are proposed such as submerging and washing the filter in water or some other cleaning solution. However, these approaches are not suitable for removing particulate matter from filters used in large outdoor systems, such as ceramic air particulate filters, as these methods are likely to damage the filters, thereby reducing their lifespan.

[0004] Accordingly, a need exists for improved apparatuses and method for regenerating filters that do not damage the filter.

SUMMARY

[0005] Embodiments can be described with reference to the following clauses, with preferred features laid out in the dependent clauses. [0006] Clause 1. A filter regeneration apparatus for regenerating a filter, the filter regeneration apparatus comprising: a main tank comprising: a panel holder configured to receive a panel including one or more filters; a branch pipe configured to distribute a rinsing solution across the panel; an inlet operable between an open position and a closed position; an outlet operable between an open position and a closed position; and a drain operable between an open position and a closed position; a low pressure air tank in fluid communication with the main tank, the low pressure air tank comprising: one or more injection valves for injecting a pressurized gas toward the panel; a cycle line having a first end and an opposite second end, the first end of the cycle line coupled to the outlet, and the second end of the cycle line in fluid communication with the inlet; and one or more pumps configured to control a flow of the rinsing solution into the main tank through the inlet and out of the main tank through the outlet by the cycle line.

[0007] Clause 2. The filter regeneration apparatus of clause 1, further comprising a rail extending within the main tank and a carriage movable along the rail across the panel, the carriage including a blade configured to direct floating particulate matter away from the panel.

[0008] Clause 3. The filter regeneration apparatus of clause 2, further comprising a brush extending from the carriage in a direction opposite the blade and configured to move along the rail and across a surface of the panel to remove particulate matter.

[0009] Clause 4. The filter regeneration apparatus of clause 2 or clause 3, further comprising a collection canal provided in the low pressure air tank, the blade configured to direct particulate matter floating on a surface of the rinsing solution into the collection canal.

[0010] Clause 5. The filter regeneration apparatus of any of clauses 1-4, further comprising an orifice plate configured to distribute the pressurized gas across the panel.

[0011] Clause 6. The filter regeneration apparatus of any of clauses 1-5, further comprising a storage tank in fluid communication with the inlet of the main tank by a main line, the storage tank configured to store the rinsing solution prior to being delivered to the main tank. [0012] Clause 7. The filter regeneration apparatus of any of clauses 1-6, further comprising a lifting member configured to move the branch pipe and the panel holder in a vertical direction toward and away from the low pressure air tank.

[0013] Clause 8. The filter regeneration apparatus of clause 7, further comprising a lower sealing member provided between the panel holder and the lifting member, the lower sealing member configured to create a seal between the panel and the panel holder and permit a flow of the rinsing solution through only a first end of the panel holder and an opposite second end of the panel holder.

[0014] Clause 9. The filter regeneration apparatus of any of clauses 1-8, further comprising a cycle filter in fluid communication with the cycle line.

[0015] Clause 10. The filter regeneration apparatus of any of clauses 1-9, wherein the branch pipe and the low pressure air tank are provided proximate a same end of the main tank.

[0016] Clause 11. The filter regeneration apparatus of any of clauses 1-10, wherein the branch pipe and the low pressure air tank are provided proximate opposite ends of the main tank.

[0017] Clause 12. The filter regeneration apparatus of any of clauses 1-11, further comprising a sensor configured to detect a level of the rinsing solution within the low pressure air tank.

[0018] Clause 13. A method for regenerating a filter, the method comprising: positioning a panel including one or more filters within a main tank of a filter regeneration apparatus; supplying a first rinsing solution into the main tank through an inlet to submerge the panel in the first rinsing solution; draining the first rinsing solution out of the main tank through a drain; applying a pressurized gas by one or more injection valves onto the panel after the first rinsing solution is drained from the main tank; supplying a second rinsing solution into the main tank to submerge the panel in the second rinsing solution; and draining the second rinsing solution from the main tank through the drain.

[0019] Clause 14. The method of clause 13, further comprising: positioning the panel within a panel holder in the main tank; and sealing the panel holder within the main tank to permit a flow of the first rinsing solution and the second rinsing solution through only a first end of the panel and an opposite second end of the panel.

[0020] Clause 15. The method of clause 13 or clause 14, further comprising pumping the first rinsing solution and the second rinsing solution from a storage tank into the main tank through a plurality of nozzles of a branch pipe to distribute the first rinsing solution and the second rinsing solution across the panel.

[0021] Clause 16. The method of any of clauses 13-16, further comprising cycling the first rinsing solution through the main tank.

[0022] Clause 17. The method of clause 16, wherein cycling the first rinsing solution comprises pumping the first rinsing solution out of the main tank through an outlet and back into the main tank through the inlet, the inlet being on a first side of the panel and the outlet being on an opposite side of the panel.

[0023] Clause 18. The method of clause 16 or clause 17, wherein cycling the first rinsing solution through the main tank occurs for a first period of time between 1 minute and 60 minutes.

[0024] Clause 19. The method of any of clauses 16-18, wherein a velocity of the first rinsing solution during cycling of the first rinsing solution is between 0.015 m/min and 2.0 m/min.

[0025] Clause 20. The method of any of clauses 17-19, further comprising initiating cycling of the first rinsing solution when a level of the first rinsing solution within the main tank reaches a predetermined level.

[0026] Clause 21. The method of any of clauses 17-20, further comprising cycling the second rinsing solution through the main tank by pumping the second rinsing solution out of the outlet and back into the main tank through the inlet.

[0027] Clause 22. The method of clause 21, wherein cycling the second rinsing solution through the main tank occurs for a second period of time between 1 minute and 30 minutes. [0028] Clause 23. The method of any of clauses 13-23, wherein applying a pressurized gas comprises delivering the pressurized gas to the one or more injection valves to inject the pressurized gas through an orifice plate having a plurality of orifices formed therein and distributing the pressurized gas onto the panel.

[0029] Clause 24. The method of clause 23, wherein the pressurized gas is injected toward the panel at a pressure between 5 psi and 45 psi.

[0030] Clause 25. The method of any of clauses 13-24, further comprising actuating a brush to move across the panel to remove particulate matter from the one or more filters of the panel when the panel is submerged in the first rinsing solution.

[0031] Clause 26. The method of any of clauses 13-25, wherein the one or more filters include a plurality of channels configured to collect air particulate matter having a diameter between 0.1 micrometers and 10 micrometers.

[0032] Clause 27. The method of any of clauses 13-26, wherein the first rinsing solution is a detergent solution with an effective concentration of detergent between 0.01% and 1.0%, and the second rinsing solution is a disinfection solution with an effective concentration of disinfectant between 0.01% and 1.0%.

[0033] Clause 28. The method of any of clauses 13-27, further comprising actuating a blade coupled to the brush for removing particulate matter floating on a surface of the first rinsing solution when the panel is submerged in the first rinsing solution.

[0034] Clause 29. The method of any of clauses 13-28, further comprising applying a pressurized gas by the one or more injection valves toward the panel after the second rinsing solution is drained from the main tank.

[0035] These and additional features provided by the embodiments described herein will be more fully understood in view of the following detailed description, in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The embodiments set forth in the drawings are illustrative and exemplary in nature and not intended to limit the subject matter defined by the claims. The following detailed description of the illustrative embodiments can be understood when read in conjunction with the following drawings, where like structure is indicated with like reference numerals and in which:

[0037] FIG. 1 schematically depicts a perspective view of an illustrative panel including a plurality of filters according to one or more embodiments shown and described herein;

[0038] FIG. 2 schematically depicts a partial front view of the filter regeneration apparatus according to one or more embodiments shown and described herein;

[0039] FIG. 3 schematically depicts a partial perspective view of the low pressure air tank of the filter regeneration apparatus according to one or more embodiments shown and described herein;

[0040] FIG. 4 schematically depicts a flow diagram of the filter regeneration apparatus according to one or more embodiments shown and described herein; and

[0041] FIG. 5 schematically depicts a flowchart of a method for operating the filter regeneration apparatus according to one or more embodiments shown and described herein.

DETAILED DESCRIPTION

[0042] Embodiments described herein are directed to filter regeneration apparatuses and methods for regenerating filters that includes submerging the filters in one or more solutions to remove particulate matter from the filters. These filters may be, for example, air particulate filters (APFs). Such ceramic air particulate filters may be, for example, inorganic filters (e.g., air particulate ceramic filters, glass-ceramic filters, or glass filters).

[0043] Referring to FIG. 2, a filter regeneration apparatus includes a main tank and a low pressure air tank in fluid communication with the main tank. The main tank includes a panel holder configured to receive a panel including one or more filters, a branch pipe configured to distribute a first rinsing solution and a second rinsing solution across the panel, an inlet operable between an open position and a closed position, an outlet operable between an open position and a closed position, and a drain operable between an open position and a closed position. The low pressure air tank includes one or more injection valves for injecting a pressurized gas toward the panel. The filter regeneration apparatus also includes a cycle line having a first end coupled to the outlet for permitting solution to exit the main tank. One or more pumps are configured to control a flow of the first rinsing solution and the second rinsing solution into the main tank through the inlet and out of the main tank through the outlet by the cycle line. Various embodiments of the filter regeneration apparatuses and the operation of the filter regeneration apparatuses are described in more detail herein. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0044] Ranges can be expressed herein as from “about” one particular value, and/or to “about” another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent “about,” it will be understood that the particular value forms another embodiment. It will be further understood that the endpoints of each of the ranges are significant both in relation to the other endpoint, and independently of the other endpoint.

[0045] Directional terms as used herein - for example up, down, right, left, front, back, top, bottom - are made only with reference to the figures as drawn and are not intended to imply absolute orientation.

[0046] Unless otherwise expressly stated, it is in no way intended that any method set forth herein be construed as requiring that its steps be performed in a specific order, nor that with any apparatus specific orientations be required. Accordingly, where a method claim does not actually recite an order to be followed by its steps, or that any apparatus claim does not actually recite an order or orientation to individual components, or it is not otherwise specifically stated in the claims or description that the steps are to be limited to a specific order, or that a specific order or orientation to components of an apparatus is not recited, it is in no way intended that an order or orientation be inferred, in any respect. This holds for any possible non-express basis for interpretation, including: matters of logic with respect to arrangement of steps, operational flow, order of components, or orientation of components; plain meaning derived from grammatical organization or punctuation, and; the number or type of embodiments described in the specification.

[0047] As used herein, the singular forms “a,” “an” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a” component includes aspects having two or more such components, unless the context clearly indicates otherwise.

[0048] Referring now to FIG. 1, a filter panel 100 is illustrated including a plurality of filters 102. It should be appreciated that the filters 102 may be any suitable filter such as, for example, an air particulate filter (APF), a diesel particulate filter (DPF), and the like. However, the apparatuses and methods disclosed herein are particularly useful in regenerating APFs due to the reduced rate of velocity flow through the apparatus, as discussed in more detail herein. As shown, the filter panel 100 includes an upper surface 104, a lower surface 106, and one or more sides 108 extending between the upper surface 104 and the lower surface 106. That is, the filter panel 100 may include a frame defining the upper surface 104, the lower surface 106, and one or more sides 108. The filter panel 100 includes one or more apertures 109. A filter 102 is disposed within each aperture 109 and extends from the upper surface 104 to the lower surface 106. Each filter 102 has a plurality of channels 110 configured to collect particulate matter flowing through the upper surface 104 and the lower surface 106. Based on the configuration of the channels 110 and use of the filter 102, the particulate matter collected by the channels 110 varies in size. In embodiments in which the filter 102 is an APF, the channels 110 may be configured to capture particulate matter ranging in size from about 0.1 micrometers to about 10 micrometers (e.g., 0.1 micrometers to 9.5 micrometers, 0.1 micrometers to 5 micrometers, 0.1 micrometers to 3 micrometers, 1 micrometer to 3 micrometers, 0.5 micrometers to 3 micrometers, or 0.1 micrometers to 2.5 micrometers). For example, in at least some embodiments an APF comprises ceramic porous honeycomb with has inlet and outlet channels, and the polluted air moves through the inlet channels of inorganic porous honeycomb APF which trap the PM on its porous walls allowing clean air to exit through the open outlet channels and be released into the environment. In embodiments in which the filter 102 is an APF, the filter 102 may comprise porous walls made of ceramic, glass-ceramic, glass, or a combination thereof. In embodiments in which the filter 102 is a DPF, the filter 102 may be configured to capture particulate matter that may be less than 0.1 micrometers such as, for example, ash and soot. The filter panel 100 has a height H extending in a longitudinal direction along each of the filters 102.

[0049] Referring now to FIG. 2, a filter regeneration apparatus 112 is illustrated for regenerating the filters 102 within the filter panel 100 illustrated in FIG. 1. The filter regeneration apparatus 112 generally comprises a lower housing 101 and an upper housing 103 positioned above the lower housing 101. As used herein, “upper” and “above” are defined as the +Z direction of the coordinate axes shown in the drawings. Similarly, “lower” and “below” as used herein are defined as the -Z direction of the coordinate axes shown in the drawings.

[0050] The lower housing 101 includes one or more side walls 118, a bottom wall 120, and an open top end 122 opposite the bottom wall 120. The lower housing 101 has an upper lip 125 extending around at least a portion of an exterior of the lower housing 101 proximate the top end 122 for securing the lower housing 101 to the upper housing 103. Although not shown, the lower housing 101 may include an access door formed in the one or more side walls 118 of the lower housing 101 for permitting the filter panel 100 to be positioned within the open interior 124 of the lower housing 101. The access door may be hingedly attached to one of the side walls 118 of the lower housing 101 and sealed when closed to prevent solution from leaking out of the lower housing 101.

[0051] The upper housing 103 includes one or more side walls 206, a top wall 208, and an open bottom end 210 opposite the top wall 208. The side walls 206, the top wall 208, and the bottom end 210 cooperate to define an open interior 212. The upper housing 103 has a lower lip 214 extending around at least a portion of an exterior of the upper housing 103 proximate the bottom end 210. The upper housing 103 is securable to the lower housing 101 using any suitable fasteners coupling the upper lip 125 of the lower housing 101 to the lower lip 214 of the upper housing 103. As described in more detail herein, a partition plate 232 is provided within the upper housing 103 and separates a main tank 114 from a low pressure air tank 116 positioned above the main tank 114. As such, the main tank 114 is defined by the lower housing 101 and a portion of the upper housing 103 below the partition plate 232. Similarly, the low pressure air tank 116 is defined by a portion of the upper housing 103 above the partition plate 232.

[0052] As shown, the filter panel 100 is positioned within the open interior 124 of the lower housing 101 within the main tank 114. Specifically, the filter panel 100 is arranged with the height H of the filter panel 100 extending along the +/-Z axis of the coordinate axes depicted in the drawings so that solution can flow through the channels 110 of the filters 102. The main tank 114 includes one or more inlets 126 formed in the bottom wall 120 of the lower housing 101 through which solution is pumped into the main tank 114. The inlet 126 may include an inlet valve 128, as depicted in FIG. 4, for positioning the inlet 126 between an open position and a closed position. When in the open position, solution may be pumped through the inlet 126 and into the main tank 114. When in the closed position, solution is prevented from flowing through the inlet 126 and into the main tank 114. As shown, the main tank 114 includes a pair of inlets 126 for increasing the rate at which the main tank 114 can be filled with solution. The main tank 114 also includes one or more drains 130 formed in the bottom wall 120 of the lower housing 101 through which solution may be drained out of the main tank 114. Similar to the inlet 126, the drain 130 may include a drain valve 132, as depicted in FIG. 4, for positioning the drain 130 between an open position and a closed position. When in the open position, solution may be pumped through the drain 130 and out of the main tank 114. When in the closed position, solution is prevented from flowing through the drain 130 and remains in the main tank 114. As shown, the main tank 114 includes a pair of drains 130 to increase the rate of removing solution from the main tank 114.

[0053] The main tank 114 includes a support plate 134 positioned proximate the bottom wall 120 of the lower housing 101 and translatable within the open interior 124 of the main tank 114 along the +/-Z axis of the coordinate axes depicted in the drawings, as discussed in more detail herein. The support plate 134 has a lower surface 136 facing the bottom wall 120 of the lower housing 101 and an upper surface 138 directed toward the top end 122 of the lower housing 101. In embodiments, the support plate 134 has a plurality of apertures 140 extending between the lower surface 136 and the upper surface 138 of the support plate 134. The apertures 140 reduce the weight of the support plate 134 while maintaining the structural integrity of the support plate 134 and supporting the filter panel 100.

[0054] The main tank 114 also includes a lower sealing member 142 having an upper surface 144 and a lower surface 146. The lower sealing member 142 is supported on the upper surface 138 of the support plate 134. The lower sealing member 142 may be ring-shaped or toroidal-shaped having an interior circumference defining a central opening 148 extending through the upper surface 144 and the lower surface 146 of the lower sealing member 142. In embodiments, the shape of the lower sealing member 142 conforms to the geometry of the one or more side walls 118 of the lower housing 101 to restrict movement of the lower sealing member 142 along the +/-Z axis of the coordinate axes depicted in the drawings. As shown, the filter panel 100 is supported on the upper surface 144 of the lower sealing member 142 and covers the central opening 148 of the lower sealing member 142. The lower sealing member 142 may be formed from any suitable material such as, for example, rubber, silicone, neoprene, and the like to create a fluid-tight seal between the lower surface 106 of the filter panel 100 and the upper surface 144 of the lower sealing member 142 to prevent cleaning solution and/or gas (such as air) from flowing therebetween.

[0055] The main tank 114 also includes a panel holder 150 having an upper surface 152 and a lower surface 154, which is supported on the upper surface 144 of the lower sealing member 142. Thus, the lower sealing member 142 is positioned between the panel holder 150 and the support plate 134. Similar to the lower sealing member 142, the panel holder 150 is ring-shaped or toroidal-shaped having an interior circumference defining a central opening 156 of the panel holder 150, which is coaxial with the central opening 148 of the lower sealing member 142. A diameter of the central opening 156 of the panel holder 150 is greater than a diameter of the central opening 148 of the lower sealing member 142. Thus, a ledge 158 is formed on the upper surface 144 of the lower sealing member 142 defined by the difference between the diameter of the central opening 156 of the panel holder 150 and the diameter of the central opening 148 of the lower sealing member 142. As shown, the filter panel 100 is provided within the central opening 156 of the panel holder 150 and supported on the ledge 158 of the lower sealing member 142. The panel holder 150 is dimensioned to extend between the lower housing 101 and the filter panel 100. Thus, movement of the panel holder 150 and the filter panel 100 is maintained along the +/-Z axis of the coordinate axes depicted in the drawings. Further, the panel holder 150 in combination with the lower sealing member 142 ensures that solution flows in the +Z direction through the filter panel 100, and thus the filters 102, rather than leaking between the lower sealing member 142 and the panel holder 150.

[0056] In embodiments, a lifting member 160 may be provided for moving the filter panel 100 along the +/-Z axis of the coordinate axes depicted in the drawings and positioning the filter panel 100 within the main tank 114 by translating the support plate 134. The lifting member 160 may be any suitable actuator or the like. In embodiments, the lifting member 160 may be pneumatically operated or motorized. In embodiments, the lifting member 160 includes a cylinder 162 and a piston 164 extendable within the cylinder 162 and movable between a retracted position and an extended position. The piston 164 has a distal end 166 opposite the cylinder 162 and mounted to the lower surface 136 of the support plate 134. As the piston 164 of the lifting member 160 is moved toward the extended position, the support plate 134, the lower sealing member 142, and the panel holder 150 are each translated in the +Z direction of the coordinate axes depicted in the drawings toward the top end 122 of the lower housing 101 and toward the low pressure air tank 116. As discussed in more detail herein, the lifting member 160 is configured to position the filter panel 100 within the main tank 114 such that the upper surface 104 of the filter panel 100 opposite the lower sealing member 142 is positioned at the top end 122 of the lower housing 101 and proximate the upper housing 103. Thus, the lifting member 160 may be utilized for correctly positioning panels having varying dimensions.

[0057] The main tank 114 includes a branch pipe 168 positioned within the central opening 148 of the lower sealing member 142 and configured to distribute solution through the filter panel 100. The branch pipe 168 is mounted to the upper surface 138 of the support plate 134. The branch pipe 168 includes a plurality of flow conduits 170 in fluid communication with one another and one or more inlet conduits 172 extending from the flow conduits 170 toward the bottom wall 120 of the lower housing 101. As discussed herein, the inlet conduits 172 are configured to receive solution flowing into the main tank 114 through the inlets 126 and distribute solution throughout the flow conduits 170. The branch pipe 168 also includes a plurality nozzles 174 spaced apart from one another along the flow conduits 170 through which solution is emitted out of the branch pipe 168 such that solution flows into the main tank 114 from a lower portion thereof. In embodiments, the nozzles 174 are equidistantly spaced apart from one another such that solution is evenly distributed and directed toward the filter panel 100. In embodiments, a branch pipe line 169, as shown in FIG. 4, may be included to provide solution directly to the branch pipe 168. In embodiments, a second branch pipe 176 may be provided within the main tank 114 on a side of the filter panel 100 opposite the branch pipe 168. It should be appreciated that the second branch pipe 176 has substantially the same structure as the branch pipe 168. As described in more detail herein, the second branch pipe 176 may be utilized during solution circulation to direct solution into the main tank 114 from an upper portion thereof. Thus, the second branch pipe 176 operates to direct a flow of solution into the main tank 114 in an opposite direction as that in which the branch pipe 168 directs solution into the main tank 114. As such, solution flows into the second branch pipe 176 through a second branch pipe line 177, as shown in FIG. 4.

[0058] In embodiments, a storage tank 178 is provided for storing a supply of solution to be provided into the main tank 114. The storage tank 178 may include an inlet 180 for receiving solution or a liquid forming a portion of the solution to fill the storage tank 178. The storage tank 178 also includes an outlet 182 for allowing solution to flow out of the storage tank 178. In embodiments, a storage tank valve 184, as depicted in FIG. 4, may be provided at the outlet 182 for opening and closing the outlet 182 of the storage tank 178 and controlling the flow of solution therethrough. In embodiments, the storage tank 178 may include a receptacle 186 removable or extendable from the storage tank 178 for receiving a cleaning agent such as, for example, a detergent or a disinfectant, as discussed in more detail herein. The storage tank 178 may also include a mixer 188 extending through an interior the storage tank 178. The mixer 188 includes an elongated shaft 190 having one or more arms 192 extending therefrom. When a cleaning agent is placed within the receptacle 186 and reinserted into the storage tank 178, the cleaning agent may be mixed with a liquid provided into the storage tank 178 to create the solution by operating the mixer 188. Particularly, as the chemical agent in the receptacle 186 is released into the storage tank 178, the mixer 188 is configured to rotate the shaft 190 and the arms 192 mix the cleaning agent with the liquid supplied to the storage tank 178 through the inlet 180.

[0059] As discussed in more detail herein, the filter regeneration apparatus 112 may utilize more than one solution to regenerate the filters 102 within the filter panel 100 during a two stage cleaning method. As such, the storage tank 178 may be refilled with different solutions after each cleaning stage. Alternatively, in other embodiments, the filter regeneration apparatus 112 may include a plurality of separate storage tanks 178 each in fluid communication with the main tank 114 such that each storage tank 178 stores a separate solution to be used during a corresponding cleaning stage. This eliminates the need to completely remove one solution from the storage tank 178 before beginning a subsequent cleaning stage which may require a different solution.

[0060] As noted above, the filter regeneration apparatus 112 includes the upper housing 103, which is positioned above the lower housing 101 and a portion of which defines the low pressure air tank 116 above the main tank 114. The upper housing 103 has an outlet 216 formed in a side wall 206 of the upper housing 103 for permitting solution to flow out of the main tank 114 and be circulated therethrough, as discussed in more detail herein. An outlet valve 218, as depicted in FIG. 4, may be provided for opening and closing the outlet 216 to control the flow of solution therethrough. Within the upper housing 103, the main tank 114 also includes an upper sealing member 220 extending along an inner perimeter of the upper housing 103. In use, the upper surface 104 of the filter panel 100 is positioned against the upper sealing member 220 when the filter panel 100 is raised by the lifting member 160. Similar to the lower sealing member 142, the upper sealing member 220 may be formed from any suitable material such as, for example, rubber, silicone, neoprene, and the like to create a fluid-tight seal between the upper surface 104 of the filter panel 100 and the upper sealing member 220 to prevent solution from flowing therebetween. In embodiments, the main tank 114 may include a sensor 222 for detecting a level of the solution within the upper housing 103. In other embodiments, the sensor 222 may be provided within the storage tank 178 for detecting a level of solution within the storage tank 178. Based on a known volume of solution originally provided to the storage tank 178 and a detected level of the solution after the solution is pumped into the main tank 114 from the storage tank 178, the level of solution within the main tank 114 may be calculated. As discussed herein, detecting the level of solution within the main tank 114 is useful for determining when to activate and deactivate valves to control the flow of solution through different lines, as discussed herein.

[0061] Referring now to FIG. 3, one or more injection valves 224 are provided within the low pressure air tank 116 for injecting pressurized gas toward the filter panel 100 positioned within the main tank 114. In embodiments, each injection valve 224 includes a mount 226 provided on an exterior of the top wall 208 of the upper housing 103. The injection valve 224 includes a shaft 228 extending from the mount 226, through the top wall 208 of the upper housing 103, and into the open interior 212 thereof. A blower head 230 is provided at an end of the shaft 228 opposite the mount 226. The injection valves 224 are configured to blow pressurized gas into the low pressure air tank 116 and toward the upper surface 104 of the filter panel 100 after solution is drained from the main tank 114. As noted above, a partition plate 232 is provided within the low pressure air tank 116, separating the main tank 114 from the low pressure air tank 116, and has one or more openings 234 corresponding to the position of each blower head 230. As shown, a plurality of injection valves 224 are provided and the partition plate 232 has a plurality of openings 234 with each opening 234 corresponding to an associated blower head 230. The injection valves 224 may be pneumatically operated or motorized. When the injection valves 224 are pneumatically operated, an injection valve line 236 may be provided extending between the mount 226 to a high pressure air tank 238, as shown in FIG. 2, to provide pressurized gas to at least the injection valves 224 and the lifting member 160. Thus, it should be appreciated that when the injection valves 224 are operated, pressurized gas is directed through the shaft 228 from the mount 226, out of the blower head 230, and through a corresponding opening 234 formed in the partition plate 232 toward the filter panel 100. As shown, five injection valves 224 are provided. However, any number of injection valves 224 may be utilized to control the amount of pressurized gas directed toward the filter panel 100. [0062] Further, the main tank 114 includes an orifice plate 240 mounted below and spaced apart from the partition plate 232. The orifice plate 240 may be mounted to a side of the partition plat opposite the injection valves 224 or to the one or more side walls 206 of the upper housing 103. The orifice plate 240 has a plurality of orifices 242 formed therein and equidistantly spaced apart from one another. Thus, the orifice plate 240 is configured to distribute the pressurized gas exiting the partition plate 232 and flowing through the orifice plate 240.

[0063] In embodiments, the filter regeneration apparatus 112 includes a cleaning assembly 244 positioned within the main tank 114 for removing particulate matter from the filters 102 in the filter panel 100 and/or directing floating particulate matter away from the filter panel 100 when the filter panel 100 is submerged in solution. The cleaning assembly 244 may include one or more rails 246 extending between opposite side walls 206 of the upper housing 103, and one or more carriages 248 configured to translate across the one or more rails 246. The carriages 248 may be pneumatically operable or motorized to translate between opposite ends of the rail 246 and across the filter panel 100. In embodiments, the cleaning assembly 244 includes one or more brushes 250 extending from the carriage 248 toward the filter panel 100 and configured to contact the upper surface 104 of the filter panel 100 due to the lifting member 160 raising the filter panel 100 to an appropriate height within the main tank 114. The brushes 250 may include bristles for wiping the filter panel 100 without damaging the filters 102 therein. Each brush 250 is configured to move across the upper surface 104 of the filter panel 100 to remove particulate matter from the filters 102 as the carriage 248 translates along the rail 246. Further, in embodiments, the cleaning assembly 244 includes one or more blades 252 extending from the carriage 248 in a direction opposite the brushes 250. While the brush 250 is positioned to contact the upper surface 104 of the filter panel 100, the blade 252 is positioned at a height corresponding to a surface of the solution within the main tank 114. Further, the blade 252 is configured to move across the surface of the solution and push particulate matter floating on the surface of the solution as the carriage 248 moves along the rail 246. More particularly, as the carriage 248 moves along the rail 246 between opposite side walls 206 of the upper housing 103, the blade 252 directs floating particulate matter into a collection canal 253. The collection canal 253 may be fixed to a side wall 206 of the upper housing 103 proximate an end of the rail 246 so that the particulate matter is collected and prevented from floating throughout in the solution. [0064] Referring again to FIG. 2, the filter regeneration apparatus 112 includes a cycle line 254 configured to circulate solution through the main tank 114. The cycle line 254 includes a first end 256 coupled to the outlet 216 formed in a side wall 206 of the upper housing 103. In embodiments, the main pump 200 may be in fluid communication with the cycle line 254 and configured to draw solution out of the main tank 114 through the cycle line 254. The main pump 200 may be provided for drawing solution out of the main tank 114 through the outlet 216 and back into the main tank 114 through the inlet 126 at the bottom wall 120 of the lower housing 101 as solution flows through the cycle line 254 and back into the inlet line 194. Thus, solution within the main tank 114 and surrounding the filter panel 100 is circulated for a predetermined period of time to wash particulate matter off of the filters 102 in the filter panel 100. In embodiments, a cycle filter 255 may be provided in fluid communication with the cycle line 254 to filter out the particulate matter from the solution flowing through the cycle line 254. The cycle filter 255 may be provided in the cycle line 254 such that solution flowing therethrough is filtered to remove particulate matter before returning the solution to the main tank 114.

[0065] The filter regeneration apparatus 112 may include an enclosure 262 in which the main tank 114, the low pressure air tank 116, the storage tank 178, and the high pressure air tank 238 are housed. However, it should be appreciated that the storage tank 178 and the high pressure air tank 238 may be located on an exterior of the enclosure 262, if provided. The enclosure 262 may include one or more wheels 264 for facilitating transporting of the filter regeneration apparatus 112. As shown, a plurality of wheels 264 are provided. Further, the enclosure 262 may have one or more doors, not shown, for accessing an interior of the enclosure 262 for access and/or maintenance of the components of the filter regeneration apparatus 112.

[0066] In embodiments in which any of the above components are pneumatically operated, the filter regeneration apparatus 112 may include a high pressure air tank 238, as discussed herein, for operating one or more of the above components such as, for example, the lifting member 160, the injection valves 224, and/or the cleaning assembly 244. The high pressure air tank 238 may be provided with any suitable gas for providing pneumatic pressure to at least one of the lifting member 160, the injection valves 224, and the cleaning assembly 244. [0067] Referring to FIG. 4, and with reference to FIGS. 2 and 3, a schematic diagram of the filter regeneration apparatus 112 as described herein is schematically depicted showing the interconnectivity of the various parts of the apparatus.

[0068] As shown, a main line 183 extends from the outlet 182 of the storage tank 178 to a return tank 270 and includes the main pump 200 in fluid communication therewith. The return tank 270 may be provided for receiving solution drawn out of the main tank 114 through the drain 130. A storage tank valve 184 may be provided in the main line 183 upstream of the main pump 200 to control solution flowing out of the storage tank 178. The main line 183 also includes a return valve 185 located downstream of the main pump 200 to control the flow of solution into the return tank 270.

[0069] An inlet line 194 extends from the main line 183 to the main tank 114 for directing solution from the main line 183 into the main tank 114 through the inlet 126. More particularly, the inlet line 194 has a first end 196 in fluid communication with the main line 183 downstream of the main pump 200, and at least one second end 198 for placing the inlet line 194 in fluid communication with the main tank 114 at a corresponding inlet 126 at the bottom wall 120 of the main tank 114. As shown in FIG. 2, the inlet line 194 has a pair of second ends 198 splitting from one another such that the inlet line 194 may be connected to each of the inlets 126 formed in the bottom wall 120 of the main tank 114 by the second ends 198 of the inlet line 194. The inlet line 194 includes an inlet valve 128 operable to control a flow of solution into the main tank 114 through the inlet 126.

[0070] Referring still to FIG. 4, a drain line 202 is provided having one or more first ends 204 connected to the drains 130 and directing fluid out of the main tank 114. Particularly, the drain line 202 has an opposite second end 203 in fluid communication with the main line 183 located upstream of the main pump 200. In embodiments, the main pump 200 is in fluid communication with both the inlet line 194 and the drain line 202 to control the flow of solution both in and out of the main tank 114. The drain line 202 includes a drain valve 132 operable to control a flow of solution out of the main tank 114 through the drain 130.

[0071] A cycle line 254 includes a first end 256 coupled to the outlet 216 formed in a side of the low pressure air tank 116, and a second end 258 in fluid communication with the main line 183 upstream of the main pump 200. The cycle line 254 includes an outlet valve 218 that controls the flow of solution being drawn out of the main tank 114 by the main pump 200. [0072] In embodiments, a branch pipe line 169 may be provided to direct solution directly to the branch pipe 168 from the main line 183. The branch pipe line 169 has a first end 171 in fluid communication with the main line 183 located downstream of the main pump 200, and a second end 173 in fluid communication with the branch pipe 168. Thus, the main pump 200 may operate to draw solution out of the main tank 114 through the cycle line 254 and back into the main tank 114 through the branch pipe line 169. The branch pipe line 169 may include a branch pipe valve 175 to control the flow of solution through the branch pipe line 169.

[0073] In embodiments, a second branch pipe line 177 may be provided to direct solution directly to the second branch pipe 178 from the main line 183. As such, the second branch pipe line 177 has a first end 179 in fluid communication with the main line 183 located downstream of the main pump 200, and a second end 181 in fluid communication with the second branch pipe 176. Thus, the main pump 200 may operate to draw solution out of the main tank 114 through the drain line 202 and back into the main tank 114 through the second branch pipe line 177. The second branch pipe line 177 may include a second branch pipe valve 187 to control the flow of solution through the second branch pipe line 177.

[0074] The high pressure air tank 238, when provided, may include a compressor for pressurizing the gas when the injection valves 224 and controlling the flow of gas through an injection valve line 236 for delivering pressurized gas to the injection valves 224. In embodiments, a pressure regulating line 189, which includes a pressure regulating valve 191, extends from the injection valve line 236 into the low pressure air tank 116. The pressure regulating valve 191 may be operated to maintain and/or regulate a pressure within the low pressure air tank 116 by supplying compressed gas from the high pressure air tank 238 into the low pressure air tank 116. Further, a cleaning assembly line 268 may be provided extending between the high pressure air tank 238 and the cleaning assembly 244 to operate the carriage 248 between opposite ends of the rail 246. The cleaning assembly line 268 delivers gas from the high pressure air tank 238, pressurized by the compressor, to the cleaning assembly 244.

[0075] It should be appreciated that the present disclosure is not intended to be limited by embodiments described herein. As such, any number of lines, valves, and/or pumps may be provided for controlling the flow of solution through the main tank 114 without departing from the scope of the present disclosure. [0076] FIG. 5 depicts a method 500 for operating the filter regeneration apparatus 112 to regenerate one or more filters of a panel, according to one or more embodiments shown and described herein. The method 500 is described herein with reference to the filter regeneration apparatus 112 illustrated in FIGS. 1-5.

[0077] At step 502, one or more filters, such as the filters 102, provided within corresponding apertures 109 of the filter panel 100 and positioned on the upper surface 144 of the lower sealing member 142 within the central opening 156 of the panel holder 150 of the main tank 114. As noted above, the filter panel 100 is arranged such that the height H of the filter panel 100 extends along the +/-Z axis of the coordinate axes depicted in the drawings such that solution may flow through the upper surface 104 and the lower surface 106 of the filter panel 100 and through the channels 110 of the filters 102. The lifting member 160 is then actuated to vertically position the filter panel 100 within the main tank 114 relative to the cleaning assembly 244 such that the upper surface 104 of the filter panel 100 contacts the upper sealing member 220 and the brush 250 contacts the upper surface 104 of the filter panel 100 facing the top end 122 of the lower housing 101. Once the upper surface 104 of the panel contacts is raised to the appropriate height, the lifting member 160 is deactivated.

[0078] At step 504, a first cleaning stage is initiated in which a first rinsing solution is supplied to the main tank 114. In embodiments, the first rinsing solution is supplied to the main tank 114 from the storage tank 178. The first rinsing solution may any suitable cleaning solution. In embodiments, the first rinsing solution may be water or, in other embodiments, the first rinsing solution may be a water-based detergent mixture. In embodiments, the first rinsing solution may be a water-detergent mixture having an effective constituent of between 0.01% and 1.0%. In other embodiments, the first rinsing solution may be a water-detergent mixture having an effective constituent of between 0.4% and 0.6%. As such, water may be provided to the storage tank 178 through the inlet 180. If detergent is to be used, the detergent may be poured into the receptacle 186 and placed within the storage tank 178. The detergent may be drawn out of the receptacle 186 and mixed with the water by operating the mixer 188 of the storage tank 178, thereby forming the first rinsing solution. Thereafter, if provided, the storage tank valve 184 may be operated to open the outlet 182 of the storage tank 178 and the inlet valve 128 may be operated to open the inlet 126 of the main tank 114. The main pump 200 is then operated to draw the first rinsing solution out of the storage tank 178 and into the main tank 114 through the main line 183 and the inlet line 194. [0079] The main pump 200 continues to draw the first rinsing solution into the main tank 114 for a predetermined period of time or until the sensor 222 positioned within the main tank 114 or the storage tank 178 determines that a predetermined amount of the first rinsing solution has been provided to the main tank 114. As discussed herein, in embodiments, the sensor 222 may be positioned within the storage tank 178 and configured to detect when the first rinsing solution is depleted or reaches a lower level, at which point the storage tank valve 184 and the inlet valve 128 are closed to prevent the first rinsing solution from continuing to flow into the main tank 114. In other embodiments, the sensor 222 may be positioned within the main tank 114, as shown in FIGS. 2 and 3, to detect when the level of the first rinsing solution reaches a high level to fully submerge the filter panel 100. In embodiments, the high level of the first rinsing solution corresponds to a height of the blade 252 of the cleaning assembly 244 such that the blade 252 contacts the surface of the first rinsing solution.

[0080] At step 506, once the first rinsing solution reaches the high level detected by the sensor to fully submerge the filter panel 100 within the first rinsing solution, the outlet valve 218 is operated to open the outlet 216 of the main tank 114 and the main pump 200 is operated to draw the first rinsing solution out of the main tank 114 through the cycle line 254. In embodiments, the first rinsing solution flows through the outlet 216, through the cycle line 254, into the main line 183, and back into the main tank 114 through the inlet line 194 via the inlet 126 formed in the bottom wall 120 of the lower housing 101 when the inlet valve 128 is open. Thus, the cycle line 254 facilitates cycling the first rinsing solution through the main tank 114 as the first rinsing solution above the filter panel 100 is drawn out of the main tank 114 and returned below the filter panel 100 to cause the first rinsing solution to continually flow through the filters 102 in the filter panel 100 to regenerate the filters 102. In other embodiments, inlet valve 128 remains closed and the branch pipe valve 175 opens so that the solution flows through the branch pipe line 169 instead of the inlet line 194. Thus, solution is delivered directly to the branch pipe 168 and distributed within the main tank 114. This step of cycling the first rinsing solution through the main tank 114 continues for a predetermined period of time. In embodiments, the cycling of the first rinsing solution continues for a period ranging from 1 minute to 60 minutes. In other embodiments, the cycling of the first rinsing solution continues for a period ranging from 6 minutes to 10 minutes. In other embodiments, the cycling of the first rinsing solution continues for a period ranging from 7 minutes to 9 minutes. In other embodiments, the cycling of the first rinsing solution continues for a period of 8 minutes. In embodiments, the velocity at which the first rinsing solution is cycled through the main tank 114 ranges from 0.01 m/min to 3.0 m/min. In some embodiments, the velocity ranges from 0.015 m/min to 2.0 m/min. In some embodiments, the velocity ranges from 0.017 m/min to 0.17 m/min. In other embodiments discussed herein, the solution may be cycled in an opposite direction through the drain line 202 and the second branch pipe line 177 as opposed to the cycle line 254 and the inlet line 194 or branch pipe line 169.

[0081] At step 508, as the first rinsing solution is being cycled through the main tank 114 through the cycle line 254, the cleaning assembly 244 is activated such that the carriage 248 including the brush 250 and the blade 252 are repeatedly translated across the filter panel 100. As the brush 250 is translated across the filter panel 100, the brush 250 removes particulate matter from the filters 102 that may be loosened by the flow of the first rinsing solution. As noted above, the high level of the first rinsing solution corresponds to a height of the blade 252 such that the blade 252 is aligned with the surface of the first rinsing solution. Translating the blade 252 across the filter panel 100 between opposite side walls 206 of the upper housing 103 causes the blade 252 to push particulate matter floating on the surface of the first rinsing solution into the collection canal 253 provided at one side wall 206 of the upper housing 103. The collection canal 253 is configured to store floating particulate matter and prevent the particulate matter from being circulated through the cycle line 254. The collection canal 253 may be removed or cleaned to remove the particulate matter accumulating therein. Once the outlet valve 218 is closed to prevent solution from flowing through the cycle line 254, the cleaning assembly 244 is deactivated as well to stop translating across the filter panel 100.

[0082] At step 510, the drain valve 132 is operated to open the drain 130 at the bottom wall 120 of the lower housing 101 to allow the first rinsing solution to be drained out of the main tank 114 through the drain line 202. As discussed herein, the main pump 200, or a separate drain pump, if provided, is operated to facilitate drawing the first rinsing solution out of the main tank 114.

[0083] At step 512, once the first rinsing solution is drained from the main tank 114, the injection valves 224 are operated to direct a flow of pressurized gas toward the filter panel 100. In doing so, the injection valves 224 are simultaneously operated, if there is more than one, to inject the pressurized gas through corresponding openings 234 formed in the partition plate 232 and toward the orifice plate 240. Thereafter, the orifice plate 240 is configured to distribute the pressurized gas through the orifices 242 formed in the orifice plate 240 and toward the upper surface 104 of the filter panel 100. The orifices 242 are configured to distribute the gas in an even manner across the +/- X axis and the +/- Y axis of the coordinate axes depicted in the drawings. As a result, the filter panel 100 receives an even flow of the pressurized gas from the low pressure air tank 116. Loose particulate matter that was not circulated out of the main tank 114 by the first rinsing solution may be dislodged by the pressurized gas. In embodiments, the injection valves 224 force the pressurized gas toward the filter panel 100 at a pressure ranging from 5 psi to 45 psi. In embodiments, the injection valves 224 force the pressurized gas toward the filter panel 100 at a pressure ranging from 10 psi to 50 psi. In embodiments, the injection valves 224 force the pressurized gas toward the filter panel 100 at a pressure ranging from 14.5 psi to 43.5 psi.

[0084] At step 514, a second cleaning stage is initiated in which a second rinsing solution is supplied to the main tank 114 after the filter panel 100 is subjected to the pressurized gas. The process of supplying the second rinsing solution to the main tank 114 is similar to the process of supplying the first rinsing solution in step 504. The second rinsing solution may be any suitable disinfectant for eliminating biological activity on the filter panel 100. In embodiments, the second rinsing solution may be a disinfectant solution with an effective constituent ranging from 0.01% to 1.0%. In other embodiments, the second rinsing solution may be a disinfectant solution with an effective constituent ranging from 0.09% to 0.5%. In other embodiments, the second rinsing solution may be a disinfectant solution with an effective constituent of 0.22%. To prepare the second rinsing solution, disinfectant such as, for example, chloroxylenol, may be poured into the receptacle 186 and placed within the storage tank 178. The disinfectant may be drawn out of the receptacle 186 and mixed with water by operating the mixer 188 of the storage tank 178, thereby forming the second rinsing solution.

[0085] Similar to step 504, the outlet 182 of the storage tank 178 is opened by operating the storage tank valve 184, the inlet valve 128 is operated to open the inlet 126 of the main tank 114, and the main pump 200 is activated to supply the second rinsing solution to the main tank 114 through the main line 183 and the inlet line 194. Once the sensor 222 detects that the level of the second rinsing solution reaches a high level corresponding to the height of the blade 252, the storage tank valve 184 is closed to prevent additional solution from flowing into the main tank 114.

[0086] At step 516, the second rinsing solution is cycled through the main tank 114 through the cycle line 254 by operating the outlet valve 218 to open the outlet 216 of the main tank 114 and operating the main pump 200 in a similar manner to that discussed above with respect to step 506. In embodiments, the second rinsing solution is cycled through the main tank 114 via the cycle line 254 and one of the inlet line 194 or the branch pipe line 169 for a predetermined period ranging from 1 minute to 30 minutes. In some embodiments, the second solution is cycled through the main tank 114 via the cycle line 254 for a predetermined period ranging from 1 minute and 5 minutes. In some embodiments, the second solution is cycled through the main tank 114 via the cycle line 254 for a predetermined period ranging from 2 minutes and 4 minutes. In some embodiments, the second solution is cycled through the main tank 114 via the cycle line 254 for a predetermined period of 3 minutes. In embodiments, the velocity at which the second rinsing solution is cycled through the main tank 114 ranges from 0.01 m/min to 3.0 m/min. In some embodiments, the velocity at which the second rinsing solution is cycled through the main tank 114 ranges from 0.015 m/min to 2.0 m/min. In some embodiments, the velocity at which the second rinsing solution is cycled through the main tank 114 ranges from 0.017 m/min to 0.17 m/min. Alternatively, the second solution may be cycled through the drain line 202 and the second branch pipe line 177, instead of the cycle line 254 and the branch pipe line 169, to reverse the flow of the second solution through the main tank 114. As the second rinsing solution is being cycled through the main tank 114, the cleaning apparatus 244 is again activated at step 518 to translate between opposite side walls 118 of the upper housing 103 and across the filter panel 100 to remove loosened particulate matter from the filters 102 and direct floating particulate matter into the collection canal 253, similar to the manner discussed in step 508.

[0087] At step 520, after the second rinsing solution has been cycled through the main tank 114 for the predetermined period of time, the drain valve 132 is operated to open the drain 130 in the bottom wall 120 of the lower housing 101 and allow the second rinsing solution to be drained out of the main tank 114 through the drain 130 by the main pump 200.

[0088] At step 522, the injection valves 224 may be operated in a similar manner as that discussed in step 512. As such, the injection valves 224 are operated after the second rinsing solution is drained from the main tank 114 to deliver a supply of pressurized gas toward the filter panel 100, through the orifices 242 formed in the orifice plate 240, to remove remaining particulate matter that was not removed by the cycling of the second rinsing solution.

[0089] From the above, it is to be appreciated that defined herein are filter regeneration apparatuses and methods for using the filter regeneration apparatus to remove particulate matter from the one or more filters positioned within a main tank. The filter regeneration apparatus is particularly suited to avoid causing damage to the filters positioned within the filter regeneration apparatus by maintaining a controlled velocity of the solutions flowing through the main tank in which the filters are submerged. Further, a low pressure air tank is provided in fluid communication with the main tank including one or more injection valves for injecting a pressurized gas at the filters to further remove particulate matter after the solution is drained from the main tank.

[0090] According to one embodiment a filter regeneration apparatus described above may further include or more air particular filters situated within at least one panel, the air particular filters comprising ceramic, glass-ceramic, or glass.

[0091] It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments described herein without departing from the spirit and scope of the claimed subject matter. Thus it is intended that the specification cover the modifications and variations of the various embodiments described herein provided such modification and variations come within the scope of the appended claims and their equivalents.