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Title:
CENTRIFUGAL GAS FILTRATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/183405
Kind Code:
A1
Abstract:
The present disclosure provides a gas filtration apparatus, which includes: a first hollow cylinder adapted to receive a stream of gas; a solid cylinder configured coaxially inside the first hollow cylinder, and adapted for rotation about a central axis; a plurality of blades configured around circumferential surface of the solid cylinder, the plurality of blades extending from the solid cylinder towards the first hollow cylinder; and a second hollow cylinder, provided coaxially inside the first hollow cylinder such that an annular space is defined between the second hollow cylinder and the first hollow cylinder, wherein a first end of the second hollow cylinder is coupled with the solid cylinder. Upon rotation of the solid cylinder, centrifugal force created by the plurality of blades segregates particulate content in the received stream of gas to enable the stream of gas with reduce d particulate content to flow through the second hollow cylinder.

Inventors:
RAUT MILIND DHANLAL (IN)
Application Number:
PCT/IB2020/052197
Publication Date:
September 17, 2020
Filing Date:
March 12, 2020
Export Citation:
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Assignee:
RAUT MILIND DHANLAL (IN)
International Classes:
B01D45/12; B60H1/24; F24F8/183; F24F13/00
Domestic Patent References:
WO2013153995A12013-10-17
Foreign References:
CN107825935A2018-03-23
KR101921274B12019-02-13
Attorney, Agent or Firm:
KHURANA & KHURANA, ADVOCATES & IP ATTORNEYS (IN)
Download PDF:
Claims:
aim:

1. A gas filtration apparatus to reduce particulate content in a gas, said apparatus comprising:

a first hollow cylinder of a first diameter, adapted to receive a stream of gas at a first end of the first hollow cylinder;

a solid cylinder of a second diameter, configured coaxially inside the first hollow cylinder from the first end of the first hollow cylinder, and adapted for rotation about a central axis, with at least a portion of the solid cylinder located within the first hollow cylinder;

a plurality of blades configured around circumferential surface of the solid cylinder, the plurality of blades extending from the solid cylinder towards the first hollow cylinder; and

a second hollow cylinder of a third diameter, provided coaxially inside the first hollow cylinder from a second end of the first hollow cylinder such that an annular space is defined between the second hollow cylinder and the first hollow cylinder, with at least a portion of the second hollow cylinder located within the first hollow cylinder, wherein a first end of the second hollow cylinder is coupled with the solid cylinder,

wherein, upon rotation of the solid cylinder, centrifugal force created by the plurality of blades segregates particulate content in the received stream of gas towards the annular space between the second hollow cylinder and the first hollow cylinder to enable the stream of gas flowing through the second hollow cylinder to have reduced particulate content.

2. The apparatus as claimed in claim 1, wherein the third diameter is smaller than the first diameter and larger than the second diameter.

3. The apparatus as claimed in claim 1, wherein the plurality of blades extend lengthwise from the solid cylinder over at least a portion of the second hollow cylinder.

4. The apparatus as claimed in claim 3, wherein the distance of extension of the plurality of the blades over the second hollow cylinder is greater than zero.

5. The apparatus as claimed in claim 1, wherein each blade of the plurality of blades has an aerofoil cross-section of a predefined width, length and thickness, and each blade of the plurality of blades subtends a predefine dangle with surface of the solid cylinder.

6. The apparatus as claimed in claim 1, wherein the apparatus is configured with a first forced induction mechanism at the first end of the first hollow cylinder to facilitate suction of the received stream of gas towards the plurality of blades.

7. The apparatus as claimed in claim 1, wherein the apparatus is configured with a second forced induction mechanism at a second end of the second hollow cylinder to facilitate ejection of stream of gas with reduced particulate content from the apparatus.

8. The apparatus as claimed in claim 1, wherein a set of variable pitch blades, operable by any or a combination of automated and manual means, is configured at any or both of the first end of the first hollow cylinder and the second end of the second hollow cylinder to facilitate direction and increased velocity of the received stream of gas and the ejected stream of gas with reduced particulate content respectively.

9. The apparatus as claimed in claim 1, wherein the solid cylinder is located completely within the hollow cylinder.

10. The apparatus as claimed in claim 1, wherein the second hollow cylinder projects outside the first hollow cylinder.

11. The apparatus as claimed in claim 1, wherein rotary motion is supplied to the solid cylinder by a rotary motion mechanism such as a motor.

Description:
CENTRIFUGAL GAS FILTRATION APPARATUS

TECHNICAL FIELD

[0001] The present invention relates to the technical field of air filters. In particular, the present disclosure pertains to a centrifugal air filtration apparatus for separating particulate materials from a gas flow stream such as an air stream.

BACKGROUND

[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[0003] An air filter is a device which filters solid particulates such as dust, pollen, mould, and bacteria from air stream. The air filters are typically composed of fibrous or porous materials which remove solid particulates such as dust, pollen, mould, and the like from gas flow streams. The air filters may include an adsorbent or catalyst such as charcoal to remove odours and gaseous pollutants such as volatile organic compounds or ozone. The air filters are used in applications where air quality is important, such as in building ventilation systems, in internal combustion engines and the like.

[0004] At present time, air pollution is increasing due to increase of the particulate content in the air so that air filtration has become a major concern. Generally, a high efficiency particulate air (HEPA) filter is used for filtering the particulate materials from an air flow stream. However, the HEPA filter has a limited lifetime period, and it needs to be replaced periodically as efficiency of the HEPA filter starts decreasing with the usage. The life period of the HEPA filter depends on intensity of the particulate material present in the air flow stream, and the duration for which it is being used for removing the particulate material present in the air flow stream.

[0005] There is, therefore, a need in the art to provide a simple, efficient and cost effective centrifugal air filtration apparatus to obviate such aforementioned challenges in the art, and to efficiently filter the particulate material from an air flow stream.

[0006] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.

[0007] In some embodiments, the numbers expressing quantities or dimensions of items, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term“about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

[0008] As used in the description herein and throughout the claims that follow, the meaning of“a,”“an,” and“the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of“in” includes“in” and“on” unless the context clearly dictates otherwise.

[0009] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g.“such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.

[0010] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

OBJECTS OF THE INVENTION

[0011] A general object of the present invention is to provide a gas filtration apparatus to reduce particulate content in a received stream of gas.

[0012] Another object of the present invention is to provide a gas filtration apparatus that does not require filter media such as HEPA filters.

[0013] Another object of the present invention is to provides a gas filtration apparatus that does not require significant maintenance.

[0014] Another object of the present invention is to provide a gas filtration apparatus that is economical.

SUMMARY

[0015] The present invention relates to the technical field of air filters. In particular, the present disclosure pertains to a centrifugal air filtration apparatus for separating particulate materials from a gas flow stream such as an air stream.

[0016] In an aspect, the present disclosure provides a gas filtration apparatus to reduce particulate content in a gas, which includes: a first hollow cylinder of a first diameter, adapted to receive a stream of gas at a first end of the first hollow cylinder; a solid cylinder of a second diameter, configured coaxially inside the first hollow cylinder from the first end of the first hollow cylinder, and adapted for rotation about a central axis, with at least a portion of the solid cylinder located within the first hollow cylinder; a plurality of blades configured around circumferential surface of the solid cylinder, the plurality of blades extending from the solid cylinder towards the first hollow cylinder; and a second hollow cylinder of a third diameter, provided coaxially inside the first hollow cylinder from a second end of the first hollow cylinder such that an annular space is defined between the second hollow cylinder and the first hollow cylinder, with at least a portion of the second hollow cylinder located within the first hollow cylinder, wherein a first end of the second hollow cylinder is coupled with the solid cylinder. Upon rotation of the solid cylinder, centrifugal force created by the plurality of blades segregates particulate content in the received stream of gas towards the annular space between the second hollow cylinder and the first hollow cylinder to enable the stream of gas flowing through the second hollow cylinder to have reduced particulate content. [0017] In an embodiment, the third diameter is smaller than the first diameter and larger than the second diameter.

[0018] In another embodiment, the plurality of blades extend lengthwise from the solid cylinder over at least a portion of the second hollow cylinder.

[0019] In another embodiment, the distance of extension of the plurality of the blades over the second hollow cylinder is greater than zero.

[0020] In another embodiment, each blade of the plurality of blades can have an aerofoil cross-section of a predefined width, length and thickness, and each blade of the plurality of blades can subtend a predefined angle with surface of the solid cylinder.

[0021] In another embodiment, the plurality of blades are coupled with the first hollow cylinder.

[0022] In another embodiment, the apparatus is configured with a first forced induction mechanism at the first end of the first hollow cylinder to facilitate suction of the received stream of gas towards the plurality of blades.

[0023] In another embodiment, the apparatus is configured with a second forced induction mechanism at a second end of the second hollow cylinder to facilitate ejection of stream of gas with reduced particulate content from the apparatus.

[0024] In another embodiment, a set of variable pitch blades, operable by any or a combination of automated and manual means, can be configured at any or both of the first end of the first hollow cylinder and the second end of the second hollow cylinder to facilitate direction and increased velocity of the received stream of gas and the ejected stream of gas with reduced particulate content respectively.

[0025] In another embodiment, the solid cylinder is located completely within the hollow cylinder.

[0026] In another embodiment, the second hollow cylinder projects outside the first hollow cylinder.

[0027] In another embodiment, rotary motion is supplied to the solid cylinder by a rotary motion mechanism such as a motor.

[0028] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0030] FIGs. 1A - 1C illustrate exemplary representations of a centrifugal gas filtration apparatus, in accordance with an embodiment of the present disclosure.

[0031] FIG. ID illustrates an exemplary schematic representation of a centrifugal gas filtration apparatus, in accordance with an embodiment of the present disclosure.

[0032] FIG. 2 illustrates an exemplary 3D representation of a centrifugal gas filtration apparatus, in accordance with an embodiment of the present disclosure.

[0033] FIG. 3A illustrates an exemplary schematic representation of an angle feed configuration of the apparatus for exhaust of particulate content, in accordance with an embodiment of the present disclosure.

[0034] FIGs. 3B and 3C illustrate exemplary schematic representations of a cylinder couple configuration for exhaust of particulate content, as viewed along the central axis of the apparatus, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION

[0035] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.

[0036] If the specification states a component or feature“may”,“can”,“could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.

[0037] As used in the description herein and throughout the claims that follow, the meaning of“a,”“an,” and“the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of“in” includes“in” and“on” unless the context clearly dictates otherwise.

[0038] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. These exemplary embodiments are provided only for illustrative purposes and so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. The invention disclosed may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Various modifications will be readily apparent to persons skilled in the art. The general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting. Thus, the present invention is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the invention have not been described in detail so as not to unnecessarily obscure the present invention.

[0039] The use of any and all examples, or exemplary language (e.g.,“such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non - claimed element essential to the practice of the invention.

[0040] The present disclosure provides a gas filtration apparatus to reduce particulate content in a received stream of gas. The apparatus is designed such as to not require expensive filter media such as HEPA filters. Further, the apparatus does not require expensive and significant maintenance, thereby making the apparatus economical. Embodiments explained herein relate to the technical field of air filtration device, and in particular, to a centrifugal air filtration apparatus for separating particulate materials from a gas flow stream such as an air stream.

[0041] In an aspect, the present disclosure provides a gas filtration apparatus to reduce particulate content in a gas, which includes: a first hollow cylinder of a first diameter, adapted to receive a stream of gas at a first end of the first hollow cylinder; a solid cylinder of a second diameter, configured coaxially inside the first hollow cylinder from the first end of the first hollow cylinder, and adapted for rotation about a central axis, with at least a portion of the solid cylinder located within the first hollow cylinder; a plurality of blades configured around circumferential surface of the solid cylinder, the plurality of blades extending from the solid cylinder towards the first hollow cylinder; and a second hollow cylinder of a third diameter, provided coaxially inside the first hollow cylinder from a second end of the first hollow cylinder such that an annular space is defined between the second hollow cylinder and the first hollow cylinder, with at least a portion of the second hollow cylinder located within the first hollow cylinder, wherein a first end of the second hollow cylinder is coupled with the solid cylinder. Upon rotation of the solid cylinder, centrifugal force created by the plurality of blades segregates particulate content in the received stream of gas towards the annular space between the second hollow cylinder and the first hollow cylinder to enable the stream of gas flowing through the second hollow cylinder to have reduced particulate content.

[0042] FIGs. 1A - 1C illustrate exemplary representations of a centrifugal gas filtration apparatus, in accordance with an embodiment of the present disclosure.

[0043] FIG. ID illustrates an exemplary schematic representation of a centrifugal gas filtration apparatus, in accordance with an embodiment of the present disclosure.

[0044] FIG. 2 illustrates an exemplary 3D representation of a centrifugal gas filtration apparatus, in accordance with an embodiment of the present disclosure.

[0045] As shown, the centrifugal gas filtration apparatus 100 (hereinafter, also referred to as“apparatus”) can include a first hollow cylinder 102, a solid cylinder 104 rotatably configured inside the first hollow cylinder 102; and a plurality of blades 106 coupled on outer periphery of the solid cylinder 104. The plurality of blades 106 can extend along length of the solid cylinder 104 such as to allow rotation of the solid cylinder 104 within the first hollow cylinder 102.

[0046] In an embodiment, the plurality of blades 106 can be coupled at the inner periphery of the first hollow cylinder 102.

[0047] In another embodiment, each blade of the plurality of blades 106 can have an aerofoil cross section of predefined width, length and thickness and arranged circumferentially on the solid cylinder 104. In another embodiment, each blade of the plurality of blades 106 can be subtend a predefined angle with the surface of the solid cylinder 104.

[0048] In another embodiment, the disclosed apparatus 100 includes a second hollow cylinder 108 coupled to the solid cylinder 104 at its first end so as to allow flow of a fluid through a bore of the second cylinder 108. A second end of the second hollow cylinder 108 can be extended out of the first hollow cylinder 102.

[0049] In another embodiment, the plurality of blades 106 can extend lengthwise from the solid cylinder 104 to at least a portion of the second hollow cylinder 108.

[0050] In another embodiment, the second hollow cylinder 108 has a diameter that is smaller than the diameter of the first hollow cylinder 102 and larger than the diameter of the solid cylinder 104. The second hollow cylinder 108 realizes an annular space with the first hollow cylinder 102.

[0051] In an embodiment, when the solid cylinder 104 is rotated about a central axis 110 at a predefined revolutions per minute (RPM) above a predefined RPM, and a gas stream is supplied inside the first hollow cylinder 102 from one side (from side A as shown by arrow) the rotation of the blades 106 along with the solid cylinderl04 causes rotation of the supplied gas stream inside the first hollow cylinder 102. The rotation of the supplied gas stream leads to creation of a centrifugal force on the gases and particulate content of the supplied gas stream. The particulate content of the supplied gas stream are heavier than then the gases which leads to separation of the particulate content and the gases of the supplied gas stream due to centrifugal action such as the particulate content rotates away from the central axis 110 and accumulates toward the annular space between the first hollow cylinder 102 and the second hollow cylinder 108, and the gases rotate close to the central axis 110.

[0052] In an embodiment, the separated gases (also referred to as particulate free/filtered gases hereinafter) of the supplied gas stream pass through the bore of the third cylinder 108 out of the third cylinder 108 (towards side B), and remaining gases flow out of the first cylinder 102.

[0053] In an embodiment, the second cylinder 104 is closed at its both ends to prevent flow of gases thorough it. In an embodiment, diameter of the second cylinder 108 is larger than the solid cylinder 104 and smaller than the first cylinder 102.

[0054] In an embodiment, the supplied gas stream can be an air stream.

[0055] In an embodiment, the second cylinder 104 can be rotated by a rotatory device such as a motor.

[0056] In an embodiment, the apparatus 100 can include a forced induction mechanism, on the side A, to enable supply of the gas flow stream into the first cylinder 102. In an embodiment, the apparatus 100 can include a forced induction mechanism, on the side B, to enable flow of the separated gases out of the second cylinder 108. In another embodiment, the apparatus 100 can include a plurality of fins on any or both of the side A and side B to facilitate flow of gases at a prespecified direction.

[0057] Referring to FIG. 1C, shows arrangement of the second cylinder 108 with the plurality of the blades 106. The second cylinder 108 may be either permanently fixed with the plurality of blades 106, or detachably fixed inside grooves of the plurality of blades 106 such that second cylinder 108 and plurality of blades 106 can slide over each other.

[0058] In an embodiment, penetration length (LP) of second cylinder 108 with each of the plurality of blades 106 may be greater than or equal to zero (0) for effectively separating the separated gases.

[0059] In another embodiment, exhaust mechanisms can be incorporated in the apparatus 100 to periodically vent the particulate content accumulated in the annular space out of the apparatus 100.

[0060] FIG. 3A illustrates an exemplary schematic representation of an angle feed configuration of the apparatus for exhaust of particulate content, in accordance with an embodiment of the present disclosure. The second hollow cylinder 302 is configured with an adjustable taper such that its second end is broader than its first end. Here, due to the momentum of the received stream of gas, the particulate content accumulated at the annular space 110 gets directed along an outer portion of the second hollow cylinder 302 to be exhausted out of the apparatus, while the stream of gas with reduced particulate content flows through the hollow portion of the second hollow cylinder 302.

[0061] The angle feed configuration allows for a continuous exhausting of particulate content from the apparatus 100. However, there is no clearly defined boundary between the particulate content and the stream of gas with reduced particulate content, thus resulting in less segregation of the particulate content and consequently, gas with higher particulate content being ejected from the apparatus 100.

[0062] FIGs. 3B and 3C illustrate exemplary schematic representations of a cylinder couple configuration for exhaust of particulate content, as viewed along the central axis of the apparatus, in accordance with an embodiment of the present disclosure. In an embodiment, the first hollow cylinder 352 of the apparatus 100 can be perforated. A third hollow cylinder 354 can be provided concentric to the first hollow cylinder 352 and encasing the first hollow cylinder 352, where the third hollow cylinder 354 can be rotatable coupled with the first hollow cylinder 352. The third hollow cylinder 354 can be provided with perforations, where the perforations of the first hollow cylinder 352 and the third hollow cylinder 354 are so aligned as to prevent flow of gas from the first hollow cylinder 352 through the third hollow cylinder 354, as shown in FIG. 3B.

[0063] During operation of the apparatus 100, particulate content accumulates at inner surface of the first hollow cylinder 352. In another embodiment, periodically, the third hollow cylinder 354 can be rotated such that the perforations of the first hollow cylinder 352 and the third hollow cylinder 354 are so aligned as to allow flow of gas from the first hollow cylinder 352 through the third hollow cylinder 354, thereby facilitating exhaust of the accumulated particulate content from the apparatus 100, as shown in FIG. 3C.

[0064] In another embodiment, the third hollow cylinder 354 can be rotated by a rotary device which controlled by a control unit to operate periodically.

[0065] In another embodiment, a sliding mechanism can be provided for exhausting the particulate content. The second hollow cylinder can be slidably coupled inside the first hollow cylinder such that the second hollow cylinder can slide along the central axis between a closed position and an open position. In the closed position, the second hollow cylinder is so configured that it is not fluidically coupled with the apparatus, thereby forming a boundary from which the air inside the apparatus us unable to escape from the side B of the apparatus. In the open position, the second hollow cylinder is so configured that it is fluidically coupled with the apparatus, thereby allowing flow of air from inside the apparatus. When the second hollow cylinder is in the closed position, the received stream of gas from side A of the apparatus, due spinning of the plurality of the blades segregates, and the particulate content gets accumulated at the annular space from where it can be exhausted from the apparatus.

[0066] In another embodiment, one or more exhaust valves can be provided on the first hollow cylinder that are configured to open periodically to exhaust the accumulated particulate content. The one or more exhaust valves can be operated by a control unit. In another embodiment, the one or more exhaust valves can be pressure release valves configured to open based on pressure.

[0067] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive patent matter, therefore, is not to be restricted except in the spirit of the appended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “includes” and “including” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refer to at least one of something selected from the group consisting of A, B, C ... .and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practised with modification within the spirit and scope of the appended claims.

[0068] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION

[0069] The present invention provides a gas filtration apparatus to reduce particulate content in a received stream of gas.

[0070] The present invention provides a gas filtration apparatus that does not require filter media such as HEP A filters.

[0071] The present invention provides a gas filtration apparatus that does not require significant maintenance.

[0072] The present invention provides a gas filtration apparatus that is economical.