NAM, Ji Hwa (106-103, Prugio Heim Apt.Yongsan-dong, Yusung-gu, Daejeon 305-500, KR)
| Claims [Claim 1] An organic waste treatment device using a high pressure-inducing screw and a housing having slits therein, the organic waste treatment device comprising: a first processing unit comprising a hopper for storing the feeding materials including any one of food waste, an agricultural by-product, a waste from forest and industrial waste containing moisture and a inlet hole through which the waste is fed into a first housing; a pressure inducing device formed at an end portion of the first processing unit; and a second processing unit connected to the pressure inducing device and for processing a solid object of food waste that is firstly expelled containing water by the first processing unit and the pressure inducing device, wherein the first housing of the first processing unit comprises a first screw for conveying and compressing the waste and a barrel for discharging liquid apart from the food waste, wherein the second processing unit comprises a second housing and a pellet die including a plurality of holes to form the solid object into a predetermined shape by the compression force, wherein the second housing comprises a heating barrel(s) for heating the solid object of food waste, a devolatilization device for suctioning the heated steam of remaining moisture, and a second screw for conveying the solid object for pressurizing a further operation. [Claim 2] The organic waste treatment device of claim 1, wherein the pressure inducing device comprises any one of a plurality of mixers of an extruder used to form plastic extrusion. [Claim 3] The organic waste treatment device of claim 1, wherein the pressure inducing device comprises barrel valve parts for inducing a pressure according to an opening and closing action of the barrel valve parts. [Claim 4] The organic waste treatment device of claim 2 or 3, wherein the barrel comprises any one of a wire-type structure and a wedge-type structure and surrounds the first screw. |
Title of Invention: ORGANIC WASTE TREATMENT DEVICE USING HIGH PRESSURE-INDUCING SCREW AND HOUSING
HAVING SLITS
Technical Field
[1] The present invention relates to an organic waste treatment device using a high pressure-inducing screw (and a housing having slits therein, and more particularly, to an organic waste treatment device using a high pressure-inducing screw and a housing having slits therein that effectively processes food waste and makes it possible to recycle the processed food waste into a fuel pellet. Background Art
[2] In general, since food waste is composed of a great amount of moisture and various kinds of food residue, if the food waste is discarded, the discarded food waste is accompanied with decay and offensive odors. The food waste with the decay and offensive odors dramatically deteriorates an environment and may be one of the main causes of an environment pollution that destroys nature. Therefore, it is desirable to process the food waste from which moisture is removed to prevent water and environmental pollution. Meanwhile, research has been recently conducted on recycling the food waste from which moisture is removed as fodder.
[3] Food waste is conventionally treated by fermentation, destruction by fire, recycling, and reclamation, which require a large scale facilities, increase energy consumption, are high-priced, result in side effects of offensive odors or inconvenience due to the collection, conveyance, and storage of the food waste, and needs a long treatment time. In order to address these problems, various types of food waste treatment devices that can be used in home and general food stores have been introduced. However, these food waste treatment devices are too expensive, render indoor air pollution due to offensive odors of the food waste, and need a long treatment time, which increases energy consumption. Thus, it may be a best solution to minimize the food waste in order to prevent an environmental pollution due to the food waste.
[4] FIG. 1 is a view of a conventional food waste treatment device.
[5] Referring to FIG. 1, the conventional food waste treatment device comprises a hopper (not shown) in which food waste containing moisture is fed, a convey screw 2 for conveying the fed food waste downstream, a hydraulic press 3 disposed in a leading edge portion of the convey screw 2 in order to compress the conveyed food waste, a perforated barrel 4, which is a housing surrounding the convey screw 2, for separately draining liquid apart from the food waste according to a pressure applied by the convey screw 2 due to the compression of the hydraulic press 3, and an outlet 5 for discharging solid objects of the food waste containing moisture .
[6] However, the conventional food waste treatment device has problems in that a great amount of solid content in liquid apart from the food waste is discharged from large perforations 6 of the perforated barrel 4 used to adjust the pressure by the compression of the hydraulic press 3, the intensity of the perforated barrel 4 is insufficient due to a structural problem that a thin perforated barrel can be used to form the perforations 6, and the solid content has a great amount of moisture due to a small range of pressure applied by a hydraulic cylinder.
[7] Meanwhile, Korean Patent No. 20-0437827 discloses a food waste separation device as a conventional art. Disclosure of Invention Technical Problem
[8] The present invention provides an organic waste treatment device that increases dehydration efficiency by adaptation of high-pressure induced screw restriction elements and by adaptation of adjusting-pressure device in the inside and/or outside of a housing, and improves a function of discharging liquid apart from the food waste by improving the shape of a perforated barrel.
[9] The present invention also provides a device for processing solid content of food waste from which a predetermined amount of moisture has been removed.
[10] The present invention also provides a device for processing an agricultural byproduct or industrial waste by feeding the agricultural by-product, including livestock manure containing moisture, a waste from forests, or industrial waste in the device, in addition to food waste. Solution to Problem
[11] According to an aspect of the present invention, there is provided an organic waste treatment device using a high pressure-inducing screw and a housing having slits therein, the organic waste treatment device including: a first processing unit comprising a hopper for storing the fed materials including any one of food waste, an agricultural by-product, a waste from forest and industrial waste containing a large amount of moisture and an inlet hole through which the waste is fed into a first housing; a pressure inducing device formed at an end portion of the first processing unit; and a second processing unit connected to the pressure inducing device and for processing a solid object of food waste that is firstly expelled containing water by the first processing unit and the pressure inducing device, wherein the first housing of the first processing unit comprises a first screw for conveying and compressing the waste and a barrel for discharging liquid apart from the food waste, wherein the second processing unit comprises a second housing and a pellet die including a plurality of holes to form the solid object into a predetermined shape by the compression force, wherein the second housing comprises a heating barrel(s) for heating the solid object of food waste, a devolatilization device for suctioning the heated steam of remaining moisture, and a second screw for conveying the solid object for pressurizing a further operation.
Advantageous Effects of Invention
[12] An organic waste treatment device using a high pressure inducing screw and a housing having slits therein according to the present invention increases dehydration efficiency by improving a pressurization performance of a housing, and discharges liquid apart from the food waste through slits in wire or wedge-type assembled structures, thereby improving a function of separating the liquid apart from the food waste from a perforation barrel having a given large size. Brief Description of Drawings
[13] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:
[14] FIG. 1 is a view of a conventional food waste treatment device;
[15] FIG. 2 is a view of an organic waste treatment device using a high pressure-inducing screw and a housing having slits therein, according to an embodiment of the present invention;
[16] FIG. 3 is a view for explaining a principle of a pressure inducing device of the organic waste treatment device of FIG. 2, according to an embodiment of the present invention;
[17] FIG. 4 is a view of a structure of a barrel of the organic waste treatment device of
FIG. 2, according to an embodiment of the present invention;
[18] FIG. 5 is a view of a structure of the pressure inducing device of FIG. 3 according to an embodiment of the present invention; and
[19] FIGS. 6 and 7 are views of a structure of the pressure inducing device of FIG. 3, according to another embodiment of the present invention. Mode for the Invention
[20] The present invention will now be described more fully with reference to the accompanying drawings. The embodiments of the present invention are described with regard to food waste; however the scope of the present invention is not limited to food waste.
[21] Referring to FIGS. 2, 4, and 5, the organic waste treatment device using the high pressure-inducing screw and the housing having slits therein, according to the present embodiment of the present invention, includes a first processing unit A, the pressure inducing device B, and a second processing unit C. [22] The first processing unit A includes a hopper (not shown) in which waste, including any one of food waste containing moisture, an agricultural by-product, a waste from forests, and industrial waste, is fed, an inlet hole 10 in which the food waste containing moisture is fed, and a first housing 20. [23] The first housing 20 includes a first screw 21 that conveys forward to compress the food waste and the barrel 22 that discharges liquid apart from the food waste. [24] Meanwhile, the pressure inducing device B is formed at an end portion of the first processing unit A. [25] The second processing unit C is connected to the pressure inducing device B and processes a solid object of food waste water from which containing water is firstly expelled through the first processing unit A and the pressure inducing device B. [26] The second processing unit C includes a second housing 30 and a pellet die 50 in which a plurality of holes are formed to mold the solid object into a predetermined shape by a compression force. [27] The second housing 30 includes a heating barrel(s) 31 for heating the solid object, a devolatilizing device 40 for suctioning steamed moisture, and a second screw 32 for conveying and pressurizing a further operation. [28] The barrel 22 of the first housing 20, which is a substitute of a conventional perforated barrel, includes any one of a wire-type structure 100 and a wedge wire-type structure 101 that surrounds the first screw 21. [29] The pressure inducing device B is disposed between the first processing unit A and the second processing unit C, and includes any one of the mixers of an extruder used to form plastic extrusion, such as a dulmage-type extruder, a pin-type extruder, a
Maddock-type extruder, a Saxton-type extruder, a reverse type screw, and the like as shown in FIG. 5. [30] Referring to FIG. 3, the pressure inducing device B applies a pressure and the solid object is designed to pass through a resistance such as a water passage so that the pressure is induced. [31] The second screw 32 is the same type as the first screw 21. The heating barrel(s) 31 of the second housing 30 heats and dries the solid object formed by a predetermined level of hydration through the first processing unit A and the pressure inducing device
C, and selects one of a heat transmitting device, a heater, and a steam heater. [32] A predetermined level of moisture, which is not processed by the first screw 21 due to a mutual friction heat of the food waste processed by the heating barrel(s) 31 and the second screw 32 of the second housing 30, is steamed. The devolatilization device 40 removes the moisture, thereby efficiently removing the moisture according to the mutual friction heat and the heat conduction from the wide surface contact area between the processed food waste and the barrel housing.
[33] If the solid object is compressed and is closely attached to the pellet die 50, in which the holes are formed, at the end portion of the second processing unit C, the solid object passes through the holes formed in the pellet die 50 and is formed according to shapes of the holes.
[34] A process of treating the food waste according to the organic waste treatment device of the present embodiment of the present invention will now be described.
[35] First, the food waste is fed into the first housing 20 through the inlet hole 10 of the hopper, is conveyed forward by the first screw 21, and liquid apart from the food waste firstly separated from the barrel 22 according to the dead weight of the food waste.
[36] The food waste from which the liquid is separated is continuously conveyed forward by the first screw 21 and is pressurized by the pressure inducing device B including any one of the mixers of an extruder used to form plastic extrusion, such as a dulmage- type extruder, a pin-type extruder, a Maddock-type extruder, a saxton type extruder, a reverse type screw, and the like, so that liquid apart from the food waste are secondly discharged and simultaneously the food waste is conveyed to the second processing unit C through the pressure inducing device B.
[37] A solid object (containing a predetermined amount of moisture) of the food waste conveyed to the second processing unit C is secondly expelled containing water through the heating barrel(s) 31 and the devolatilization device 40 when the solid object is conveyed by the second screw 32, is finally attached between the second screw 32 and the pellet die 50, passes through the holes of the pellet die 50, and is discharged.
[38] An organic waste treatment device of another embodiment of the present invention is different from the organic waste treatment device of the present embodiment in terms of the pressure inducing device B, as will now be described.
[39] Referring to FIGS. 6 and 7, the pressure inducing device B induces a pressure according to an opening and closing action of barrel valve parts and conveys a solid object of food waste to the second processing unit C. The barrel valve parts include a peak barrel 302 that surrounds a screw 301, an upper barrel 303 and a lower barrel 304 that are formed to contact the peak barrel 302, a transfer plate 307 and a transfer plate support bar 306 that are formed between the upper barrel 303 and the lower barrel 304 and extend and reduce a water passage, and a transfer plate fastening screw 305, a gap adjusting screw 308, and a screw extending unit 309 that are used to adjust a gap of the transfer plate 307.
[40] Meanwhile, if an object that is to be fed into an inlet hole is modified, the organic waste treatment device of the present embodiment is not limited to processing food waste but may process an agricultural by-product, including livestock manure, a waste from forests, and industrial waste containing moisture. That is, other embodiments of the present invention process the agricultural by-product, the waste from forests, and the industrial waste containing moisture once the agricultural by-product, the waste from forests, and the industrial waste are fed into a hopper, instead of the food waste described in the first and second embodiments.
[41] While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. The exemplary embodiments should be considered in a descriptive sense only and not for purposes of limitation. Therefore, the scope of the present invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope of the present invention will be construed as being included in the present invention.