Kitchen garbage fermentation treatment equipment
By designing a kitchen waste fermentation treatment equipment with a vertical channel and diffusion chamber structure, and utilizing the combination of heating elements and pressure plates and baffles, the problems of high energy consumption and low heat transfer efficiency of drum dryers are solved, achieving efficient kitchen waste drying.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QINGDAO HOTEL MANAGEMENT VOCATIONAL & TECH COLLEGE
- Filing Date
- 2023-12-13
- Publication Date
- 2026-05-05
AI Technical Summary
Existing drum-type drying equipment has high energy consumption and low heat transfer efficiency. After long-term use, the formation of an oil layer on the inner wall greatly reduces the heat transfer efficiency and makes cleaning inconvenient.
Design a kitchen waste fermentation treatment device including a fermentation tank, a conveying unit and a shell. It adopts a vertical channel and diffusion chamber structure, uses a heating unit to heat and dry the kitchen waste, and achieves multiple heating and dispersing of kitchen waste through the cooperation of pressure plate and baffle to avoid grease residue on the inner wall of the channel.
It improves heat transfer efficiency, reduces heat loss, and achieves higher drying efficiency. It also avoids the impact of grease residue on heating effect, thus realizing efficient drying of kitchen waste.
Smart Images

Figure CN117655057B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of kitchen waste treatment technology, specifically to a kitchen waste fermentation treatment device. Background Technology
[0002] Fermentation of kitchen waste is a method of recycling and processing kitchen waste.
[0003] The main processes of kitchen waste fermentation equipment include waste collection and sorting, dehydration, fermentation, and drying. The order of fermentation and drying in this process can be selected according to the actual situation and needs to bring different results.
[0004] The current method for drying fermented kitchen waste is generally a drum-type drying equipment. The kitchen waste is put into the drum dryer and the drum rotates and is then heated. This method requires a lot of energy for each heating and the heat transfer efficiency is not high, so the heating efficiency is low. Moreover, after long-term use, an oil layer will form on the inner wall of the drum dryer, which greatly reduces the heat transfer efficiency and is not easy to clean. Summary of the Invention
[0005] The purpose of this invention is to provide a kitchen waste fermentation treatment device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a kitchen waste fermentation treatment device, comprising a fermentation tank, a conveying assembly, and a shell. The shell contains several vertical channels. Two inclined plates are fixedly connected to the top and bottom of the shell. These four inclined plates seal the top and bottom of the shell, creating V-shaped openings. The channels are evenly distributed from top to bottom. A diffusion chamber is provided between every two channels, communicating with the channels. The channels facilitate the flow of kitchen waste from top to bottom. Each diffusion chamber contains a diffusion assembly. Each of the aforementioned channels is equipped with a heating group on its sidewalls, which is used to heat the kitchen waste transported through the channel. Each channel is equipped with a baffle inside, and a support group is provided below the baffle to support it. The baffle is used to block the kitchen waste inside the channel. A pressure plate is provided at the top of each baffle. A drive group is provided at the front and rear of the housing. The drive group is used to drive the pressure plate to press down the kitchen waste above the baffle. After the baffle descends to its limit position, the support group will drive the baffle to flip over to complete the conveying of kitchen waste from top to bottom.
[0007] As a further embodiment of the present invention, the support assembly includes a frame plate, which is slidably connected to the inner wall of the channel in the vertical direction. A first spring is fixedly connected between the frame plate and the inner wall of the channel. The baffle is rotatably connected to the frame plate. A slot is provided at both the front and rear sides of the frame plate. A gear is provided inside each of the two slots. The rotation shafts at the front and rear ends of the baffle pass through the slots and are fixedly connected to the gears. A rack is meshed below each of the two gears. The two racks are slidably connected to the inner wall of the frame plate. A second spring is fixedly connected between each of the two racks and the inner wall of the frame plate. An inclined transition surface is provided on the inner wall of the diffusion cavity.
[0008] As a further embodiment of the present invention, each end of the rack is rotatably connected to a roller.
[0009] As a further embodiment of the present invention, the drive assembly includes uprights and sleeves corresponding one-to-one with the number of baffles. The uprights are all located directly above the slots in the frame plates. The uprights are fixedly connected to the bottom of the pressure plates and can press down on the frame plates. The sleeves are all fixedly connected to the outer wall of the housing. The ends of the pressure plates penetrate the housing and are slidably connected to the housing. The ends of the pressure plates are located inside the sleeves on one side. Each sleeve has a strip groove and a pull rod is provided inside each sleeve. The pull rod is slidably connected to the strip groove on one side of each sleeve.
[0010] A lifting assembly is provided on one side of each pull rod, and the lifting assembly is used to synchronously drive several pull rods to slide up and down along the strip groove.
[0011] As a further embodiment of the present invention, the lifting assembly includes a cylinder and a vertical rod, the vertical rod being fixedly connected to a plurality of the pull rods, and the cylinder being fixedly connected between the vertical rod and the outer wall of the housing.
[0012] As a further embodiment of the present invention, the heating group includes a plurality of heating elements, all of which are fixedly connected to the side wall of the channel.
[0013] As a further embodiment of the present invention, both sides of the uppermost channel are fixedly connected with a flow guide plate, and a plurality of through holes are opened on the uppermost side wall. Liquid outlet holes are opened on both the left and right side walls of the housing at positions corresponding to the flow guide plate.
[0014] As a further embodiment of the present invention, the diffusion assembly includes a motor, the output shaft of which extends to the inner wall of the housing, and a stirring shaft is fixedly connected to the rotating shaft of the motor.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] Each time kitchen waste descends through the channel, it is directly pressed down by the pressure plate after drying. The pressure plate can contact the inner wall of the channel, and it plays a role in pressing down and cleaning. This prevents the grease in the kitchen waste from remaining on the inner wall of the channel and affecting the heat transfer effect of the heating unit. After being pressed down, the kitchen waste descends inside the channel. At this time, the kitchen waste is in a compacted state and there is no air inside, which improves the heat transfer efficiency. After being broken up, it is compacted again and heated and dried, so that the grease also evaporates along with the moisture. The heat loss is minimal, and the drying efficiency is good. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the fermentation equipment of the present invention;
[0018] Figure 2 This is a schematic diagram showing the positional relationship between the housing, the inclined plate, and the drive assembly of the present invention;
[0019] Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention;
[0020] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;
[0021] Figure 5 This is a schematic diagram showing the positional relationship between the channel, diffusion cavity, baffle, and pressure plate of the present invention;
[0022] Figure 6 This is a schematic diagram of the support assembly of the present invention;
[0023] Figure 7 This is a schematic diagram showing the positional relationship between the gear, rack, and second spring of the present invention.
[0024] Figure 8 This is a schematic diagram showing the positional relationship between the vertical rod, cylinder, sleeve pressure plate, and baffle of the present invention.
[0025] Figure 9 This is a cross-sectional view of the sleeve rod of the present invention;
[0026] Figure 10 for Figure 9 A magnified view of a section at point B in the middle;
[0027] Figure 11 This is a schematic diagram showing the strip groove of the present invention being formed near the upper part of the sleeve rod;
[0028] Figure 12 This is a schematic diagram showing the strip groove of the present invention being formed near the lower part of the sleeve rod.
[0029] The attached diagram lists the components represented by each number as follows:
[0030] 1. Shell; 2. Conveying assembly; 3. Fermentation tank; 4. Heating assembly; 5. Channel; 6. Diffusion chamber; 7. Baffle; 8. Pressure plate; 9. Inclined plate; 10. Frame plate; 11. Gear; 12. Rack; 13. Second spring; 14. Vertical rod; 15. Sleeve rod; 16. Strip groove; 17. Tie rod; 18. Cylinder; 19. Vertical rod; 20. Heating element; 21. Through hole; 22. Drain plate; 23. Liquid outlet; 24. Motor; 25. First spring; 26. Stirring shaft. Detailed Implementation
[0031] Please see Figure 1-12 This invention provides a technical solution: a kitchen waste fermentation treatment device, including a fermentation tank 3, a conveying group 2, and a shell 1. The shell 1 has several vertical channels 5 inside. Two inclined plates 9 are fixedly connected to the top and bottom of the shell 1. The four inclined plates 9 can seal the top and bottom of the shell 1, turning the top and bottom of the shell 1 into V-shaped openings. The channels 5 are evenly distributed from top to bottom. A diffusion chamber 6 is provided between every two channels 5, and the diffusion chamber 6 communicates with the channel 5. The channels 5 are used to circulate kitchen waste from top to bottom. Each diffusion chamber 6 is equipped with a diffusion group. Each of the channel 5 is equipped with a heating group 4 on its side wall. The heating group 4 is used to heat the kitchen waste conveyed by the channel 5. Each of the channels 5 is equipped with a baffle 7 and a support group is provided below it. The support group is used to support the baffle 7. The baffle 7 is used to block the kitchen waste inside the channel 5. A pressure plate 8 is provided at the top of each baffle 7. A drive group is provided at the front and rear of the housing 1. The drive group is used to drive the pressure plate 8 to press down the kitchen waste above the baffle 7. After the baffle 7 descends to its limit position, the support group will drive the baffle 7 to flip over to complete the conveying of kitchen waste from top to bottom.
[0032] When the above scheme is put into actual use, both the fermentation tank 3 and the conveying group 2 are existing technologies. The fermentation tank 3 is used to ferment kitchen waste. After fermentation is completed, the waste falls from below onto the conveying group 2. The conveying group 2 can be set as a conveyor belt or a screw conveyor. The conveying group 2 transports the kitchen waste falling from the fermentation tank 3 to the top of the shell 1.
[0033] The food waste conveyed by conveyor group 2 falls into the V-shaped opening formed by the two upper inclined plates 9, and then into the uppermost channel 5. The baffle 7 in the uppermost channel 5 supports the food waste inside. Then, the drive group starts working, driving several pressure plates 8 to descend simultaneously. When the pressure plate 8 descends for the first time, there is only food waste inside the uppermost channel 5 and on the uppermost baffle 7. Therefore, during the first descent of the pressure plate 8, the waste will flow from between the two upper inclined plates 9 into the channel... The food waste descends into channel 5, compressing it and expelling air. Heating unit 4 heats the food waste from the side wall of channel 5. As the pressure plate 8 compresses the food waste, it pulls the baffle 7 and support unit below down together. During its descent, the food waste is rapidly heated by heating unit 4, thus drying it. During the drying process, the food waste remains in a relatively compact state, improving heat transfer efficiency.
[0034] When the drive unit lowers the pressure plate 8 to its limit position, the support unit and baffle 7 also lower to their limit positions. At this time, the support unit and baffle 7 will descend into the lower diffusion chamber 6. The support unit will then drive the baffle 7 to flip, and the pressure plate 8 will stop at this position. At this time, the food waste above the baffle 7 will fall directly into the diffusion chamber 6 after the baffle 7 is no longer blocked. The diffusion unit inside the diffusion chamber 6 can break up the falling food waste. After the drive unit drives the pressure plate 8 to its limit position, all the pressure plates 8 will descend into the channel 5 below them and block the channel 5. At this time, the broken food waste will stop in the second channel 5, and the uppermost channel 5 is also blocked by the pressure plate 8. Therefore, the food waste waiting to be dried above the inclined plate 9 will not fall directly.
[0035] Then the drive group drives all the pressure plates 8 to rise to the initial position at the same time. At this time, the support group will also drive the baffle 7 to rise to the initial position. At this time, the pressure plates 8 will separate from the channel 5. At this time, the kitchen waste will fall down to the uppermost channel 5 through the inclined plate 9 again. The kitchen waste that is broken up in the diffusion chamber 6 below will also fall into the channel 5 below it, but it will still be blocked by the baffle 7. At this time, the kitchen waste in the channel 5 below the uppermost channel 5 will be heated and dried again by the heating group 4 of the train.
[0036] Then, the drive unit lowers the pressure plate 8 again, and the kitchen waste is conveyed from top to bottom. As the drive unit cycles, the kitchen waste descending from above the inclined plate 9 is heated and dried by the heating units 4 on both sides of the channel 5, then descends into the lower diffusion chamber 6 where it is dispersed by the diffusion unit, and then descends again into the lower channel 5 for heating and drying, and then descends into the lower diffusion chamber 6 where it is dispersed by the diffusion unit. This process of drying and dispersing the kitchen waste multiple times avoids the problems of clumping and uneven drying. When the pressure plate 8 at the bottom presses the kitchen waste to its limit, the lower support unit will cause the lower baffle 7 to flip, and the kitchen waste in the lower channel 5 will be discharged directly downwards, thus completing the discharge process.
[0037] Furthermore, in this way, each time the kitchen waste descends through channel 5, it is directly pressed down by the pressure plate 8 after being dried. The pressure plate 8 can contact the inner wall of channel 5, and it plays the role of pressing down and cleaning. This prevents the grease in the kitchen waste from remaining on the inner wall of channel 5 and affecting the heat transfer effect of heating group 4. After being pressed down, the kitchen waste descends inside channel 5. At this time, the kitchen waste is in a compacted state and there is no air inside, resulting in better heat transfer efficiency. After being broken up and then pressed down again for heating and drying, the grease also evaporates along with the moisture, resulting in less heat loss and better drying efficiency. In addition, the inner wall of diffusion chamber 6 is bonded with a sponge layer in actual use. The sponge layer can contact the kitchen waste when the diffusion group breaks it up. Through the force of the kitchen waste flying and the sponge layer, the grease is absorbed, preventing incomplete evaporation of grease.
[0038] As a further embodiment of the present invention, the support assembly includes a frame plate 10, which is slidably connected to the inner wall of the channel 5 in the vertical direction. A first spring 25 is fixedly connected between the frame plate 10 and the inner wall of the channel 5. The baffle 7 is rotatably connected to the frame plate 10. The front and rear sides of the frame plate 10 are provided with slots. Gears 11 are provided inside the two slots. The rotation shafts of the front and rear ends of the baffle 7 pass through the slots and are fixedly connected to the gears 11. A rack rod 12 meshes with the lower side of the two gears 11. The two rack rods 12 are slidably connected to the inner wall of the frame plate 10. A second spring 13 is fixedly connected between the two rack rods 12 and the inner wall of the frame plate 10. The inner wall of the diffusion cavity 6 is provided with an inclined transition surface.
[0039] As a further embodiment of the present invention, rollers are rotatably connected to the ends of the rack rod 12.
[0040] In operation, the baffle 7 is rotatably connected to the frame plate 10. When food waste enters the channel 5, the baffle 7 blocks the food waste above. At this time, the first spring 25 is not stretched by the weight of the food waste above the baffle 7, and the baffle 7 cannot rotate due to the restriction of the rack and pinion 12 by the gear 11. When the drive unit drives the pressure plate 8 to descend, the pressure plate 8 compacts the food waste and then pushes the baffle 7 down. At this time, the frame plate 10 slides vertically downward along the channel 5, and the first spring 25 is gradually stretched. When the drive unit drives the pressure plate 8 to descend... After reaching the limit position, the baffle 7 and the frame plate 10 will also descend to the limit position. Since the inner wall of the diffusion cavity 6 is provided with an inclined transition surface, when the frame plate 10 and the baffle 7 are about to descend to the limit position, the roller at the end of the rack rod 12 and the rack rod 12 will be pushed outward by the second spring 13. The roller is existing technology and will not be described in detail. At this time, after the rack rod 12 is disengaged from the channel 5, it will slide outward along the frame plate 10. At this time, the rack rod 12 meshes with the gear 11, thereby driving the baffle 7 to rotate downward, thereby causing the kitchen waste above to fall quickly to the bottom.
[0041] After the kitchen waste is discharged, the frame plate 10 is pulled upward by the action of the first spring 25. When the frame plate 10 rises, the roller will contact the inclined transition surface of the diffuser 6. The rack rod 12 gradually slides along the frame plate 10 to the initial position. At this time, the second spring 13 is gradually compressed, and the baffle 7 will return to the initial position. Then the baffle 7 rises to the position of contacting the pressure plate 8. Then the drive group drives the pressure plate 8 to rise. After the frame plate 10 rises to the initial position, it separates from the pressure plate 8. Then the pressure plate 8 rises to the initial position.
[0042] As a further embodiment of the present invention, the drive assembly includes uprights 14 and sleeves 15 corresponding one-to-one with the number of baffles 7. The uprights 14 are all located directly above the slots on the frame plate 10. The uprights 14 are fixedly connected to the bottom of the pressure plate 8 and can press down on the frame plate 10. The sleeves 15 are all fixedly connected to the outer wall of the housing 1. The ends of the pressure plates 8 penetrate the housing 1 and are slidably connected to the housing 1. The ends of the pressure plates 8 are located inside the sleeves 15 on one side. The sleeves 15 are all provided with strip grooves 16. The sleeves 15 are all provided with pull rods 17 inside. The pull rods 17 are slidably connected to the strip grooves 16 on one side.
[0043] A lifting assembly is provided on one side of each of the pull rods 17. The lifting assembly is used to synchronously drive several pull rods 17 to slide up and down along the strip groove 16.
[0044] When the above-mentioned drive group is working, the lifting group drives several pull rods 17 to descend synchronously. When the pull rods 17 descend, they will drive the pressure plate 8 to descend along the sleeve rod 15 and the inside of the strip groove 16. At this time, the kitchen waste inside the channel 5 will be squeezed. When the kitchen waste can no longer be squeezed, the kitchen waste will drive the baffle 7 to descend.
[0045] With the uprights 14, the frame plate 10 can be pulled upward by the first spring 25 after it descends to the limit position and does not come into contact with the pressure plate 8. Instead, it is blocked by the uprights 14 and is at a certain distance from the pressure plate 8, so as to prevent the frame plate 10 from rising too fast and the kitchen waste above from not falling off completely.
[0046] like Figures 9-12 The slot 16 can be formed near the top or bottom of the sleeve 15. Figure 11 as well as Figure 11 The previously shown groove 16 is located near the top of the sleeve 15. Figure 12 The position shown is near the bottom. You can choose according to the actual situation. When the position is near the bottom, the lever 17 can seal the strip groove 16 after sliding down, preventing the heat and moisture inside the housing 1 from escaping.
[0047] As a further embodiment of the present invention, the lifting assembly includes a cylinder 18 and a vertical rod 19, the vertical rod 19 being fixedly connected to a plurality of the pull rods 17, and the cylinder 18 being fixedly connected between the vertical rod 19 and the outer wall of the housing 1.
[0048] When the above-mentioned lifting assembly is in operation, the cylinder 18 is activated. When the cylinder 18 extends or retracts, it drives the vertical rod 19 to rise or fall. The vertical rod 19 drives several pull rods 17 to rise or fall simultaneously, thereby causing the pressure plate 8 to rise or fall.
[0049] As a further embodiment of the present invention, the heating group 4 includes a plurality of heating elements 20, all of which are fixedly connected to the side wall of the channel 5.
[0050] When the above solution is in operation, the kitchen waste is dried by heating the heating element 20.
[0051] As a further embodiment of the present invention, both sides of the uppermost channel 5 are fixedly connected with a flow guide plate 22, and a plurality of through holes 21 are opened on the uppermost side wall. Liquid outlet holes 23 are opened on both the left and right side walls of the housing 1 at positions corresponding to the flow guide plate 22.
[0052] In operation, the uppermost channel 5 has a through hole 21 on its side wall. The purpose of the through hole 21 is to prevent the kitchen waste from containing moisture when the pressure plate 8 presses it down. Although the kitchen waste is separated into oil and water before fermentation, the through hole 21 is provided to prevent moisture from being present during the pressing process. When moisture is present, the pressure plate 8 presses the kitchen waste, causing the moisture to flow through the through hole 21 to the guide plate 22 and then be discharged outward through the liquid outlet hole 23.
[0053] As a further embodiment of the present invention, the diffusion group includes a motor 24, the output shaft of the motor 24 extends to the inner wall of the housing 1, and a stirring shaft 26 is fixedly connected to the rotating shaft of the motor 24.
[0054] When the above solution is in operation, the motor 24 starts and drives the stirring shaft 26 to rotate, thereby breaking up the kitchen waste.
Claims
1. A kitchen waste fermentation treatment device, comprising a fermentation tank (3), a conveying group (2), and a shell (1), characterized in that: The shell (1) has several vertical channels (5) inside. Two inclined plates (9) are fixedly connected to the top and bottom of the shell (1). The four inclined plates (9) can seal the top and bottom of the shell (1) and make the top and bottom of the shell (1) into V-shaped openings. The channels (5) are evenly distributed from top to bottom. A diffusion chamber (6) is provided between every two channels (5). The diffusion chamber (6) is connected to the channel (5). The channel (5) is used to circulate kitchen waste from top to bottom. A diffusion group is provided inside each diffusion chamber (6). A heating group (4) is provided on the side wall of each channel (5). (4) Used to heat the kitchen waste conveyed by the channel (5). Each channel (5) is equipped with a baffle (7). A support group is provided below the baffle (7). The support group is used to support the baffle (7). The baffle (7) is used to block the kitchen waste inside the channel (5). A pressure plate (8) is provided at the top of the baffle (7). A drive group is provided at the front and rear of the housing (1). The drive group is used to drive the pressure plate (8) to press down the kitchen waste above the baffle (7). After the baffle (7) descends to the limit position, the support group will drive the baffle (7) to flip over to complete the conveying of kitchen waste from top to bottom.
2. The kitchen waste fermentation treatment equipment according to claim 1, characterized in that: The support assembly includes a frame plate (10), which is slidably connected to the inner wall of the channel (5) in the vertical direction. A first spring (25) is fixedly connected between the frame plate (10) and the inner wall of the channel (5). The baffle (7) is rotatably connected to the frame plate (10). The front and rear sides of the frame plate (10) are provided with slots. Gears (11) are provided inside the two slots. The rotation shafts of the front and rear ends of the baffle (7) pass through the slots and are fixedly connected to the gears (11). A rack rod (12) meshes with the bottom of the two gears (11). The two rack rods (12) are slidably connected to the inner wall of the frame plate (10). A second spring (13) is fixedly connected between the two rack rods (12) and the inner wall of the frame plate (10). The inner wall of the diffusion cavity (6) is provided with an inclined transition surface.
3. The kitchen waste fermentation treatment equipment according to claim 2, characterized in that: Rollers are rotatably connected to the ends of the rack (12).
4. The kitchen waste fermentation treatment equipment according to claim 2, characterized in that: The drive assembly includes uprights (14) and sleeves (15) corresponding one-to-one with the number of baffles (7). The uprights (14) are all located directly above the slots on the frame plate (10). The uprights (14) are fixedly connected to the bottom of the pressure plate (8). The uprights (14) can press down on the frame plate (10). The sleeves (15) are all fixedly connected to the outer wall of the housing (1). The ends of the pressure plate (8) penetrate the housing (1) and are slidably connected to the housing (1). The ends of the pressure plate (8) are located inside the sleeves (15) on one side. The sleeves (15) are all provided with strip grooves (16). The sleeves (15) are all provided with pull rods (17). The pull rods (17) are slidably connected to the strip grooves (16) on one side. A lifting group is provided on one side of each of the pull rods (17), and the lifting group is used to synchronously drive several pull rods (17) to slide up and down along the strip groove (16).
5. The kitchen waste fermentation treatment equipment according to claim 4, characterized in that: The lifting assembly includes a cylinder (18) and a vertical rod (19). The vertical rod (19) is fixedly connected to several of the pull rods (17). The cylinder (18) is fixedly connected between the vertical rod (19) and the outer wall of the housing (1).
6. The kitchen waste fermentation treatment equipment according to claim 1, characterized in that: The heating group (4) includes several heating elements (20), all of which are fixedly connected to the side wall of the channel (5).
7. The kitchen waste fermentation treatment equipment according to claim 6, characterized in that: Both sides of the uppermost channel (5) are fixedly connected with a flow guide plate (22), and several through holes (21) are opened on the uppermost side wall. Liquid outlet holes (23) are opened on the left and right side walls of the housing (1) at the positions corresponding to the flow guide plate (22).
8. The kitchen waste fermentation treatment equipment according to claim 1, characterized in that: The diffusion group includes a motor (24), the output shaft of which extends to the inner wall of the housing (1), and a stirring shaft (26) is fixedly connected to the rotating shaft of the motor (24).
Citation Information
Patent Citations
Multifunctional kitchen garbage treating device
CN109332363A
Environment-friendly conversion treatment machine for kitchen / food waste
CN111992572A