An organic solid waste treatment system and treatment process thereof

Abstract

The invention relates to an organic solid waste treatment system and a treatment process thereof, comprising: a fermentation device, wherein the fermentation device is used for fermenting solid waste; a feeding device, wherein the feeding device comprises a feeding hopper and an extrusion wheel, wherein the extrusion wheel is located at the outlet of the feeding hopper, and wherein the extrusion wheel is used for chopping and extruding the solid waste to reduce the water content in the solid waste; a drying device, wherein the drying device comprises a dehydration part for dehydration and a heating and drying part for drying the dehydrated solid waste; and a garbage incinerator, wherein the garbage incinerator is used for incinerating solid waste, and a conveying device is arranged between the feeding device and the drying device, and between the garbage incinerator and the drying device; organic matter is fermented by the fermentation device, and biogas in the fermentation is used for power generation, thereby obtaining a large amount of clean energy while harmlessly treating the organic matter, and reducing the harm to the environment in the solid waste treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste treatment, and in particular to an organic solid waste treatment system and a treatment process thereof. Background Art

[0002] With the rapid development of my country's economy, the total amount of organic solid waste has increased rapidly, including agricultural and forestry waste, organic components in domestic waste, municipal sludge, etc. Among them, the annual output of agricultural and forestry waste and domestic waste alone reached 1.5 billion tons and 191 million tons respectively, equivalent to nearly 780 million tons of standard coal. Realizing the high-value utilization of organic solid waste has become an urgent need for the strategic goal of social and national ecological construction.

[0003] Organic solid waste has a complex composition, contains a high proportion of organic matter and water, is easily corrupted and emits a foul odor, and can easily lead to the spread of pollution sources, spread diseases, pollute water sources, soil and air, and seriously threaten human health and environmental safety. Therefore, it is called an "environmental killer". Many countries in the world regard organic solid waste as hazardous materials.

[0004] In the related technology, organic solid waste is mainly treated by landfill, which causes great harm to the environment and endangers human survival and development. Summary of the invention

[0005] In order to solve the above problems, the present application provides an organic solid waste treatment system and a treatment process thereof.

[0006] In the first aspect, the present application provides an organic solid waste treatment system, which adopts the following technical solution:

[0007] An organic solid waste treatment system, comprising:

[0008] A feeding device, the feeding device comprising a feeding hopper and an extrusion wheel, the extrusion wheel being located at the outlet of the feeding hopper, and the extrusion wheel being used to chop and squeeze the solid waste to reduce the water content in the solid waste;

[0009] A drying device, the drying device comprising a dehydration part for dehydrating and a heating and drying part for drying the dehydrated solid waste; and

[0010] A garbage incinerator, wherein the garbage incinerator is used to incinerate solid waste, and a conveying device is provided between the feeding device and the drying device, and between the garbage incinerator and the drying device; wherein,

[0011] The extrusion wheel includes a first rotating wheel and a second rotating wheel spaced apart and arranged side by side, a space for solid waste to pass through is formed between the first rotating wheel and the second rotating wheel, the first rotating wheel is provided with a steam injection pipe, the steam injection pipe extends along the radial direction of the first rotating wheel, and the length of the steam injection pipe is less than the spacing between the first rotating wheel and the second rotating wheel, the steam injection pipe is used to communicate with an external steam pipeline, the steam injection pipe has a gas injection state and a closed state, when the first rotating wheel rotates until the steam injection pipe faces the second rotating wheel, the steam injection pipe is in the gas injection state, and when the first rotating wheel rotates to face away from the second rotating wheel, the steam injection pipe is in the closed state.

[0012] Preferably, a plurality of steam outlets are spaced apart on the steam injection pipe, and the steam ejected from the steam outlets is arranged to face away from the first runner side;

[0013] And / or, cutters are arranged at intervals on the first rotating wheel and the second rotating wheel, and the rotation speed of the first rotating wheel is lower than the rotation speed of the second rotating wheel.

[0014] Preferably, the first impeller comprises a fixed shaft and a rotating sleeve connected to the fixed shaft and rotatably connected along the circumference of the fixed shaft, the steam injection pipe is arranged on the rotating sleeve, a steam chamber is arranged on the fixed shaft, the opening of the steam chamber faces the second impeller side, the steam chamber is used to communicate with an external steam pipeline, the connection between the steam injection pipe and the rotating sleeve is communicated with the inside of the rotating sleeve, when the steam injection pipe is in a gas injection state, the steam injection pipe rotates to the opening of the steam chamber; when the steam injection pipe is in a closed state, the steam injection pipe rotates to an opening away from the steam chamber.

[0015] Preferably, the dehydration part includes a dehydration bin, a solid waste inlet is provided on the upper side wall of the dehydration bin, a push plate and a pressure plate are slidably provided in the dehydration bin, the pressure plate can be close to / away from the push plate, the dehydration bin includes a feeding state and a dehydration state, the solid waste inlet is located between the push plate and the pressure plate and when the push plate and the pressure plate are away from each other, the dehydration bin is in a unloading state, when the push plate and the pressure plate are close to each other, the dehydration bin is in a dehydration state, and a liquid leakage part is provided in the area between the push plate and the pressure plate.

[0016] Preferably, the pressing plate comprises a first part and a second part, the first part is located on the side of the second part close to the upper wall of the dehydration bin, the first part is slidably arranged on the second part along the side toward the upper wall of the dehydration bin, a first pushing member is hingedly connected to the first part to push the first part to move toward the pushing plate side, a second pushing member is hingedly connected to the second part to push the second part to move toward the pushing plate side, the first pushing member is located at an end of the first part away from the second part, and the second pushing member is located at an end of the second part away from the first part;

[0017] And / or, the pressing plate is provided with a clamping mechanism for clamping the solid waste on the pressing plate.

[0018] Preferably, a drying hopper is provided at the solid waste inlet, and the push plate includes a baffle and a matching plate, the baffle is used to seal the solid waste inlet, when the dehydration bin is in a feeding state, the baffle and the matching plate are located on the side of the solid waste inlet away from the pressure plate, and when the dehydration bin is in a dehydration state, the baffle seals the solid waste inlet.

[0019] Preferably, the lower side wall of the dehydration bin is provided with a solid waste outlet, the heating and drying section includes a heating box arranged at the solid waste outlet, an opening and closing door is arranged at the bottom of the heating box, the solid waste outlet is located on the side of the solid waste inlet away from the pressure plate, and the push plate can be moved to the side of the solid waste outlet away from the solid waste inlet to allow the solid waste to pass through the solid waste outlet.

[0020] Preferably, the push plate also includes a cover plate, and when the cover plate slides to the solid waste outlet, the cover plate seals the solid waste outlet, and when the matching plate moves to the solid waste outlet away from the solid waste inlet side, the matching plate and the side wall of the dehydration bin form a closed space, and the closed space is connected with an air outlet pipe and a pressure relief pipe, the air outlet pipe is connected to the waste incinerator, the air outlet pipe is connected with a one-way valve, and the pressure relief pipe is connected with a pressure relief valve, and when the matching plate moves away from the solid waste outlet side, the gas in the closed space will enter the waste incinerator through the air outlet pipe.

[0021] Preferably, the connection point between the pressure relief pipe and the dehydration bin is located between the connection point between the air outlet pipe and the dehydration bin and the solid waste outlet, and when the push plate moves until the baffle plate and / or the cover plate abuts against the inner wall of the dehydration bin, a pressure chamber is formed between the push plate and the dehydration bin.

[0022] Preferably, the fermentation device comprises a fermentation tank, a spray pipe, a heating pipe and a stirrer are arranged in the fermentation tank, and a feed inlet and a discharge port are arranged on the fermentation tank.

[0023] In a second aspect, the present application provides an organic solid waste treatment process, which adopts the following technical solution:

[0024] An organic solid waste treatment process, comprising an organic solid waste treatment system as described in the above technical solution, further comprising the following steps:

[0025] The solid waste is sent to a fermentation device for fermentation treatment;

[0026] The solid waste discharged from the fermentation device is sent to the feeding device for cutting and squeezing to remove part of the water in the solid waste;

[0027] The solid waste from which part of the water has been removed is squeezed and dehydrated by a drying device;

[0028] The solid waste after extrusion and dehydration is heated and dried by a drying device;

[0029] The dried solid waste is sent to the waste incinerator for incineration.

[0030] In summary, the present invention includes at least one of the following beneficial technical effects:

[0031] This solution removes most of the water from the solid waste and then dries the solid waste. Finally, the dried solid waste is sent to a waste incinerator for incineration, so that the solid waste can be thoroughly treated. There is no need to landfill the solid waste during the treatment. Compared with direct landfilling of solid waste, this solution can greatly protect the environment. At the same time, the heat from combustion can also be used to generate electricity, etc.

[0032] Before the solid waste is sent to the waste incinerator, it is dried to increase the calorific value of the solid waste, making it burn more efficiently and thoroughly, avoiding organic residues. Since the water content is low during combustion, the amount of smoke in the solid waste combustion can be reduced, making the solid waste burn completely, reducing the emission of harmful substances such as carbon monoxide and organic volatiles, and reducing the harm to the environment during solid waste treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural diagram of the fermentation device.

[0034] Figure 2 It is a flowchart of an embodiment of the present application.

[0035] Figure 3 It is a structural schematic diagram of the feeding device.

[0036] Figure 4 It is a structural schematic diagram of the extrusion wheel.

[0037] Figure 5 It is a structural schematic diagram of the dehydration bin in a dehydration state.

[0038] Figure 6 It is a first structural schematic diagram of the dehydration bin in the unloading state.

[0039] Figure 7 It is a second structural schematic diagram of the dehydration bin in the unloading state.

[0040] Figure 8 It is a third structural schematic diagram of the dehydration bin in the unloading state.

[0041] Fig. 9 It is a structural diagram of the coordination between the dehydration unit and the waste incinerator.

[0042] Fig.10 It is a schematic diagram of the connecting rod structure.

[0043] In the figure, 1, feeding device; 2, feeding hopper; 3, extrusion wheel; 4, first rotating wheel; 5, steam injection pipe; 6, cutting knife; 7, fixed shaft; 8, rotating sleeve; 9, steam chamber; 10, second rotating wheel; 11, drying device; 12, dehydration part; 13, heating and drying part; 14, garbage incinerator; 15, conveying device; 16, dehydration bin; 17, solid waste inlet; 18, push plate; 19, pressing plate; 20, liquid leakage part; 21, first part; 22, second part; 23, first pusher; 24, second pusher; 25. Drying hopper; 26. Baffle; 27. Matching plate; 28. Solid waste outlet; 29. ​​Heating box; 30. Opening and closing door; 31. Cover plate; 32. Enclosed space; 33. Air outlet pipe; 34. Pressure relief pipe; 35. Pressure chamber; 36. Connecting rod; 37. Mesh plate; 38. Fermentation tank; 39. Spray pipe; 40. Heating pipe; 41. Mixer; 42. Feed inlet; 43. Discharge outlet; 44. Liquid outlet pipe; 45. Biogas pipe; 46. Biogas boiler; 47. Generator set; 48. Transmission line; 49. Gas collecting port. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0045] Embodiment 1:

[0046] Reference Figure 1 , Figure 2 , is an organic solid waste treatment system disclosed in the present invention, comprising a fermentation device, a feeding device 1, a drying device 11 and a garbage incinerator 14, wherein the fermentation device is used to ferment the solid waste; the feeding device 1 is used to receive external solid waste, and cut and squeeze the solid waste. After the solid waste passes through the feeding device 1, most of the water in the solid waste will be separated, thereby reducing the water content in the solid waste entering the subsequent links. When the solid waste is cut by the feeding device 1, some solid waste contains plastic bags, etc., so part of the water will be wrapped in the plastic bags. By cutting the solid waste, the bag-like objects in the solid waste can be broken, which is convenient for the water in the bag-like objects to flow out. The solid waste treated by the feeding device 1 will be sent to the drying device 11, which is used to further dehydrate the solid waste, and the drying device 11 can dry the dehydrated solid waste to reduce the water content in the solid waste. The waste incinerator 14 is used to incinerate solid waste. In this embodiment, the solid waste processed by the drying device 11 will be sent to the waste incinerator 14 for incineration.

[0047] Reference Figure 1The fermentation device includes a fermentation tank 38, a feed port 42, a spray pipe 39, a heating pipe 40, a discharge port 43, a mixer 41, a liquid discharge pipe 44, a float, a biogas pipe 45, a biogas boiler 46, a generator set 47, and a transmission line 48. A feed port 42 is provided in the middle and upper part of the fermentation tank 38, and the organic solid waste and the fermented liquid generated are in the middle and lower part. A heating pipe 40 is provided in the middle and lower part of the fermentation tank 38, and a discharge port 43 is provided at the bottom. A mixer 41 is provided on the side wall of the middle and lower part of the fermentation tank 38, and a liquid outlet pipe 44 is provided on the upper part of the fermented liquid. A float is connected to the liquid outlet pipe 44, and the liquid outlet end is connected to the drain pipe. A spray pipe 39 is provided in the upper part of the fermentation tank 38, and a gas collecting port 49 is provided at the top. A biogas pipe 45 is provided on the gas collecting port 49, and the biogas pipe 45 is connected to a biogas boiler 46. The biogas boiler 46 is connected to a generator set 47, and the generator set 47 is connected to a transmission line 48. The transmission line 48 is connected to the heating pipe 40 in the middle and lower part of the fermentation tank 38. Among them, the mixer 41 is used to stir the organic solid waste in the fermentation tank 38.

[0048] When solid waste is fermented, the following processing steps are included:

[0049] 1) Pre-treat the organic solid waste: break up the organic solid waste, add fermentation bacteria and additives, and mix them evenly;

[0050] 2) The pretreated organic solid waste is added to the fermentation tank 38 for three-stage strain screening fermentation: the first stage is 20 room temperature fermentation for 10-15 days; then the temperature is increased by 1-2°C every day to a medium temperature fermentation temperature of 30-40°C for 8-10 days; then the temperature is increased by 1-2°C every day to 50-63°C, and the temperature is maintained at 50-63°C for continuous fermentation, during which the screening of high temperature dominant strains is completed.

[0051] 3) The biogas generated by fermentation is transported to the biogas power station through the gas collecting pipe for biogas power generation. Part of the generated electricity is transported to the high-temperature anaerobic fermentation tank 38 for power supply heating pipe 40, and part of it is incorporated into the power grid;

[0052] 4) An electric heating tube 40 is installed in the fermentation tank 38, and the power comes from the biogas power station.

[0053] 5) The fermentation residue in the fermentation tank 38 is filtered out and put into the feeding device 1 for secondary solid waste treatment.

[0054] Among them, refer to,3, Figure 4The feeding device 1 includes a feeding hopper 2 and an extrusion wheel 3. The extrusion wheel 3 is located at the outlet of the feeding hopper 2. The extrusion wheel 3 is used to chop and squeeze the solid waste discharged from the biogas pipe to reduce the water content in the solid waste. In one embodiment, the extrusion wheel 3 includes a first rotor 4 and a second rotor 10 spaced apart and arranged side by side. A space for solid waste to pass through is formed between the first rotor 4 and the second rotor 10. The first rotor 4 is provided with a steam injection pipe 5. The steam injection pipe 5 extends along the radial direction of the first rotor 4. The length of the steam injection pipe 5 is less than the spacing between the first rotor 4 and the second rotor 10. The steam injection pipe 5 is used to communicate with an external steam pipeline. The steam injection pipe 5 has a gas injection state and a closed state. When the first rotor 4 rotates to the steam injection pipe 5 toward the second rotor 10, the steam injection pipe 5 is in the gas injection state. When the first rotor 4 rotates to the back of the second rotor 10, the steam injection pipe 5 is in the closed state. It can be understood that the steam injection pipe 5 is made of high-strength steel, so that when the steam injection pipe 5 is inserted into the solid waste, the steam injection pipe 5 will not break or bend, etc., and it is also convenient to insert the steam injection pipe 5 into the interior of the solid waste, so as to heat the interior of the solid waste at high temperature, and in the process of passing steam into the solid waste, it is convenient to discharge some oil-water mixture in the solid waste, avoiding the situation that animal oil solidifies in the solid waste and cannot be discharged in time, and facilitating the recovery of water and grease in the solid waste.

[0055] The drying device 11 includes a dehydration section 12 for dehydration and a heating and drying section 13 for drying the dehydrated solid waste; the garbage incinerator 14 is used to incinerate the solid waste, and a conveying device 15 is provided between the feeding device 1 and the drying device 11, and between the garbage incinerator 14 and the drying device 11. The conveying device 15 can be used to deliver the solid waste processed by the feeding device 1 to the drying device 11, and can also be used to deliver the solid waste processed by the drying device 11 to the garbage incinerator 14. The garbage incinerator 14 has a high temperature of 800-1000 degrees, which can fully burn and treat the solid waste. Figure 2 As shown, a mesh plate 37 is provided on the outlet side of the feed hopper 2. The mesh plate 37 is inclined to the right and has mesh holes, so that the squeezed water flows down through the mesh holes, and the solid waste is guided along the inclined mesh plate 37 to other areas of the conveying device 15, avoiding the squeezed water from mixing with the solid waste.

[0056] Reference Figure 3 , Figure 4In an optional embodiment, a plurality of steam outlets are arranged at intervals on the steam injection pipe 5, and the steam ejected from the steam outlets is arranged to face away from the first rotor 4, that is, the steam ejected from the steam outlets is inclined toward the free end of the steam injection pipe 5. When solid waste is hung on the steam injection pipe 5, the steam ejected from the steam outlets will provide the solid waste with a force toward the free end of the steam injection pipe 5. When the steam injection pipe 5 is rotated to a state where its free end is vertically downward, coupled with the force provided to the solid waste when the steam is ejected, the solid waste can be more easily detached from the steam injection pipe 5, thereby avoiding the situation where a large amount of solid waste stays on the steam injection pipe 5. At the same time, the ejected steam can also enter the interior of the solid waste, avoiding the situation where a large amount of steam leaks from the gap between the steam injection pipe 5 and the solid waste.

[0057] Reference Figure 3 , Figure 4 In an optional embodiment, cutters 6 are arranged at intervals on the first rotating wheel 4 and the second rotating wheel 10, and the rotation speed of the first rotating wheel 4 is lower than the rotation speed of the second rotating wheel 10. The cutters 6 are arranged at intervals on the first rotating wheel 4 and the second rotating wheel 10, which means that cutters 6 are arranged on both the first rotating wheel 4 and the second rotating wheel 10, and a plurality of cutters 6 are distributed on the first rotating wheel 4, and a plurality of cutters 6 are distributed on the second rotating wheel 10, and the plurality of cutters 6 are arranged at intervals along the axial direction of the first rotating wheel 4, and the plurality of cutters 6 are arranged at intervals along the axial direction of the second rotating wheel 10. At the same time, when the first rotating wheel 4 and the second rotating wheel 10 are arranged side by side, the cutter 6 on the first rotating wheel 4 and the cutter 6 on the second rotating wheel 10 are staggered, so as to avoid that when the cutter 6 on the first rotating wheel 4 and the cutter 6 on the second rotating wheel 10 are facing each other, the distance between the cutter 6 on the first rotating wheel 4 and the cutter 6 on the second rotating wheel 10 is small, and when encountering hard objects in the solid waste, the cutter 6 may be damaged. If the cutter 6 on the first rotating wheel 4 and the cutter 6 on the second rotating wheel 10 are staggered, the distance between the cutter 6 on the first rotating wheel 4 and the cutter 6 on the second rotating wheel 10 can be large, and the cutter 6 is not easily damaged. The rotation speed of the first rotating wheel 4 is lower than the rotation speed of the second rotating wheel 10, so that the solid waste can generate relative friction with the cutter 6, which is convenient for cutting the solid waste. A serrated structure can also be provided on the periphery of the cutter 6, which is conducive to sawing off harder solid waste. At the same time, since the rotation speed of the first impeller 4 is relatively low, the steam injection pipe 5 can be slowly inserted into the solid waste and slowly removed from the solid waste, thereby avoiding the situation where the steam injection pipe 5 is easily damaged when the steam injection pipe 5 enters and exits the solid waste at a fast speed.

[0058] Reference Figure 4In an optional embodiment, the first impeller 4 includes a fixed shaft 7 and a rotating sleeve 8 connected to the fixed shaft 7 and rotatably connected to the fixed shaft 7 along the circumferential direction of the fixed shaft 7. The steam injection pipe 5 is arranged on the rotating sleeve 8. A steam chamber 9 is arranged on the fixed shaft 7. The opening of the steam chamber 9 faces the second impeller 10 side. The steam chamber 9 is used to communicate with an external steam pipeline. The connection between the steam injection pipe 5 and the rotating sleeve 8 is connected to the inside of the rotating sleeve 8. When the steam injection pipe 5 is in a gas injection state, the steam injection pipe 5 rotates to the opening of the steam chamber 9; when the steam injection pipe 5 is in a closed state, the steam injection pipe 5 rotates to an opening away from the steam chamber 9. Specifically, a steam chamber 9 is provided on the fixed shaft 7 along the axial direction of the fixed shaft 7. The cross section of the steam chamber 9 is fan-shaped. The steam chamber 9 is provided with an opening away from the central side of the fixed shaft 7. After the rotating sleeve 8 is sleeved on the fixed shaft 7, the opening of the steam chamber 9 is located between the fixed shaft 7 and the rotating sleeve 8. It can be understood that a sealing structure is provided between the fixed shaft 7 and the rotating sleeve 8 to prevent a large amount of steam in the steam chamber 9 from leaking from the gap between the fixed shaft 7 and the rotating sleeve 8. In some embodiments, the sealing structure is a mechanical seal. In some embodiments, the sealing structure is a rubber ring or a packing seal, which is intended to reduce the leakage of steam through the sealing structure. When the rotating sleeve 8 rotates relative to the fixed shaft 7, the opening of the steam chamber 9 will be opposite to different positions of the rotating sleeve 8, so that the steam chamber 9 is connected to different steam injection pipes 5 on the rotating sleeve 8. There are multiple steam injection pipes 5 distributed at intervals along the circumferential and axial directions of the rotating sleeve 8. Since the opening of the steam chamber 9 faces the second rotor 10 side, whenever the steam injection pipe 5 rotates to face the second rotor 10 side, the steam injection pipe 5 can be connected with the steam chamber 9, so that the steam in the steam chamber 9 enters the steam injection pipe 5; when the steam pipe rotates to be offset from the opening of the steam chamber 9, the steam injection pipe 5 will be separated from the steam chamber 9, so that the steam will not enter the steam injection pipe 5. By setting the opening size of the steam chamber 9, the time when the steam injection pipe 5 is connected with the steam chamber 9 can be controlled. When the opening of the steam chamber 9 occupies a semicircle of the fixed shaft 7, the steam injection pipe 5 can also be connected with the steam chamber 9 in the vertical upward position and the vertical downward position. The size of the steam chamber 9 opening can be adjusted according to actual needs to control the time when the steam injection pipe 5 is connected with the steam chamber 9. Since the steam injection pipe 5 is arranged at intervals on the rotating sleeve 8, when the rotating sleeve 8 rotates, there will be a situation where the steam injection pipe 5 is not connected to the steam chamber 9 for a certain period of time, which will increase the air pressure in the steam chamber 9. Later, when the steam injection pipe 5 is connected to the steam chamber 9 with increased air pressure, the steam will be ejected from the steam injection pipe 5 at a high speed, which is conducive to allowing the steam to enter the solid waste. By rotating the rotating sleeve 8, the steam in the steam chamber 9 can be intermittently pressurized.

[0059] Reference Figure 5 , Figure 6In an optional embodiment, the dehydration part 12 includes a dehydration bin 16, and a solid waste inlet 17 is provided on the upper side wall of the dehydration bin 16. A push plate 18 and a pressure plate 19 are slidably provided in the dehydration bin 16, and the pressure plate 19 can be close to / away from the push plate 18. The dehydration bin 16 includes a feeding state and a dehydration state. When the solid waste inlet 17 is located between the push plate 18 and the pressure plate 19 and the push plate 18 and the pressure plate 19 are away from each other, the dehydration bin 16 is in a unloading state. When the push plate 18 and the pressure plate 19 are close to each other, the dehydration bin 16 is in a dehydration state. A liquid leakage part 20 is provided in the area between the push plate 18 and the pressure plate 19. The dehydration bin 16 includes a feeding state and a dehydration state, which means that the dehydration bin 16 can be in a feeding state and a dehydration state as needed. At a certain moment, the dehydration bin 16 is in a feeding state, and at another moment, the dehydration bin 16 can be in a dehydration state, so that after the solid waste enters the dehydration bin 16, the solid waste is dehydrated in the dehydration bin. When in use, the push plate 18 and the pressure plate 19 are moved away from each other until the solid waste entering the solid waste inlet 17 can enter between the push plate 18 and the pressure plate 19, and then the solid waste is allowed to enter the dehydration bin 16 through the solid waste inlet 17. When the solid waste between the push plate 18 and the pressure plate 19 reaches a certain amount, the push plate 18 and the pressure plate 19 can be pushed closer to each other. At this time, the solid waste can be squeezed by the push plate 18 and the pressure plate 19, so that part of the water remaining in the solid waste is discharged, and the discharged water will flow out of the dehydration bin 16 through the leakage part 20 and be collected. In one embodiment, the liquid leakage portion 20 includes a plurality of mesh holes, which allow liquid to flow out and can prevent solid waste from falling out of the dehydration bin 16 .

[0060] Reference Figure 7 , Figure 8 In an optional embodiment, the pressing plate 19 includes a first part 21 and a second part 22, the first part 21 is located on the upper wall side of the second part 22 close to the dehydration bin 16, the first part 21 is slidably arranged on the second part 22 along the upper wall side toward the dehydration bin 16, a first pushing member 23 is hingedly connected to the first part 21 to push the first part 21 to move toward the push plate 18, a second pushing member 24 is hingedly connected to the second part 22 to push the second part 22 to move toward the push plate 18, the first pushing member 23 is located at the end of the first part 21 away from the second part 22, and the second pushing member 24 is located at the end of the second part 22 away from the first part 21. Specifically, as Figure 7As shown, the solid waste inlet 17 is located at the upper side wall of the dehydration bin 16. In this embodiment, the dehydration bin 16 is a closed cavity with a rectangular space, and the pressing plate 19 and the pushing plate 18 are both slidably arranged inside the dehydration bin 16. Specifically, the first part 21 is located above the second part 22, and the first part 21 is slidably connected to the second part 22. When the first part 21 slides relative to the second part 22, it can move toward / away from the upper side wall of the dehydration bin 16. Preferably, a slot is provided on the first part 21, and an inserting part is provided on the second part 22. The inserting part and the slot are slidably matched to achieve the sliding connection between the first part 21 and the second part 22. Since the slot is located on the first part 21, the opening end of the slot is arranged downward, which can prevent the water in the solid waste from entering the slot. The first pusher 23 and the second pusher 24 can push the positions of the first part 21 and the second part 22, so that when the pressing plate 19 and the pushing plate 18 are close to each other, the first part 21 can be closer to the pushing plate 18. Furthermore, the second portion 22 may be gradually moved closer to the push plate 18 until the distance between the second portion 22 and the push plate 18 is the same as that between the second portion 22 and the push plate 18 .

[0061] When the solid waste needs to be dehydrated, the first part 21 and the second part are pushed closer to the push plate 18, and the distance between the first part 21 and the second part 22 and the push plate 18 is controlled, so that the first part 21 is closer to the push plate 18, until the solid waste is pressed between the first part 21 and the push plate 18 and between the second part 22 and the push plate 18, so that the water in the solid waste flows out, and then the second part 22 is gradually pushed by the second pusher 24, so that the second part 22 moves toward the push plate 18. At this time, due to the limited space in the dehydration bin 16, the second part 22 will be relative to the first part 21. Sliding, at the same time, makes the second part 22 closer to the push plate 18, in this process, the water in the solid waste will be further discharged, in this process, the solid waste near the dehydration bin 16 is first dehydrated, so that the water in this part of the solid waste flows to the lower side of the dehydration bin 16, and then the solid waste at the lower side of the dehydration bin 16 is dehydrated, so that the water in the solid waste at the lower side is discharged, and the drainage method from top to bottom can better realize the dehydration of the solid waste, and can make the water content of the solid waste lower, which is beneficial to the subsequent treatment of the solid waste and improves the efficiency of the dehydration of the solid waste.

[0062] Reference Figure 7 , Figure 8In an optional embodiment, a drying hopper 25 is provided at the solid waste inlet 17, and the push plate 18 includes a baffle 26 and a matching plate 27. The baffle 26 is used to seal the solid waste inlet 17. When the dehydration bin 16 is in a feeding state, the baffle 26 and the matching plate 27 are located on the side of the solid waste inlet 17 away from the pressing plate 19. When the dehydration bin 16 is in a dehydration state, the baffle 26 seals the solid waste inlet 17. In order to improve the dehydration efficiency. When the dehydration bin 16 is in a dehydration state, the solid waste inlet 17 is sealed by the baffle 26. At this time, the solid waste processed by the feeding device 1 is continuously conveyed to the solid waste inlet 17 by the conveying device 15. The solid waste conveyed to the solid waste inlet 17 can be temporarily stored through the drying hopper 25. When the solid waste in the dehydration bin 16 is dehydrated and the dehydration bin 16 is in a feeding state, the baffle 26 will open the solid waste inlet 17. At this time, the solid waste temporarily stored in the drying hopper 25 will quickly enter the dehydration bin 16, thereby speeding up the processing of the solid waste. In this embodiment, the matching plate 27 separates the dehydration bin 16 into two independent spaces on the left and right. Preferably, the plane where the matching plate 27 is located is in a vertical plane, and the baffle 26 is parallel to the upper top surface of the dehydration bin 16. In this embodiment, the plane where the baffle 26 is located is perpendicular to the plane where the matching plate 27 is located, that is, the baffle 26 and the matching plate 27 form a "T" shape.

[0063] In an alternative embodiment, referring to Figure 7 , Figure 8 , a solid waste outlet 28 is provided on the lower side wall of the dehydration bin 16, the heating and drying section 13 includes a heating box 29 provided at the solid waste outlet 28, an opening and closing door 30 is provided at the bottom of the heating box 29, the solid waste outlet 28 is located on the side of the solid waste inlet 17 away from the pressing plate 19, and the push plate 18 can be moved to the side of the solid waste outlet 28 away from the solid waste inlet 17, so that the solid waste passes through the solid waste outlet 28. A steam pipe or an electric heating wire is provided in the side wall of the heating box 29, which is used to heat the solid waste in the heating box 29, so that the water in the solid waste in the heating box 29 is evaporated, thereby drying the solid waste, which is helpful for the subsequent incineration of the solid waste. It can be understood that when the solid waste in the heating box 29 is heated, the generated water vapor and the like will enter the dehydration bin 16, and be located between the right side of the matching plate 27 and the dehydration bin 16. When the solid waste in the heating box 29 is dried, the operator opens the door 30, and the solid waste in the heating box 29 falls onto the conveyor 15, and is then transported to the waste incinerator 14 by the conveyor 15 (see Fig. 9 as shown).

[0064] After the solid waste in the dehydration bin 16 is dehydrated, the push plate 18 and the baffle plate 26 move to the right, and the pressing plate 19 moves to the right together, and the dehydrated solid waste moves to the right together. When the dehydrated solid waste moves to the right to the solid waste outlet 28, the solid waste enters the heating box 29 from the solid waste outlet 28, and then the push plate 18, the baffle plate 26 and the pressing plate 19 move to the left together to dehydrate the new solid waste. In this process, after the baffle 26 is removed from the solid waste inlet 17, the solid waste in the drying hopper 25 will fall into the dehydration bin 16. Therefore, in order to prevent the solid waste from burying the pressing plate 19, when the pressing plate 19 moves to the right, it can only move to the left edge of the solid waste inlet 17 at most. At this time, the dehydrated solid waste will need to move to the right together with the baffle 26 and the matching plate 27. Since the dehydrated solid waste is pressed between the baffle 26 and the matching plate 27, when the baffle 26 and the matching plate 27 move to the right, the dehydrated solid waste will also be driven to move together. In order to prevent the dehydrated solid waste from being separated from the baffle 26 and the matching plate 27 under special circumstances, a clamping mechanism for clamping the solid waste on the pressing plate 19 is provided on the pressing plate 19. The dehydrated solid waste can be clamped between the baffle 26 and the matching plate 27 by the clamping mechanism. It is understandable that the dehydrated solid waste is subjected to a relatively large pressure, so that the dehydrated solid waste will form a whole structure, and the clamping mechanism can limit the whole structure so that the baffle plate 26 and the matching plate 27 move together.

[0065] In one embodiment, referring to Figure 8 , Fig.10 The clamping mechanism includes a connecting rod 36 disposed between the baffle plate 26 and the matching plate 27, as shown in FIG. Fig.10 As shown, the connecting rod 36 is an inverted "L" shape, and the corner of the connecting rod 36 is hinged on the baffle 26 or the matching plate 27. When the connecting rod 36 rotates, the upper end of the connecting rod 36 can rotate from the baffle 26 away from the upper side of the dehydration bin 16 to the bottom side of the dehydration bin 16, so that the part of the connecting rod 36 located at the upper end protrudes from the inside of the baffle 26 to the bottom side of the dehydration bin 16. As shown in Figure 7, at this time, a clamping structure is formed between the part of the connecting rod 36 protruding from the baffle 26 and the matching plate 27, thereby clamping the solid waste located there, so that the solid waste moves to the right together with the matching plate 27 and is not easy to separate from the matching plate 27. Preferably, a burr structure can be provided on the part of the connecting rod 36 protruding from the baffle 26 to increase the gripping force of the connecting rod 36 on the solid waste. Among them, space for the connecting rod 36 to move is provided in the matching plate 27 and the baffle plate 26, and the driving component for driving the matching plate 27 to move is connected to the connecting rod 36. When the driving component pulls the matching plate 27 to the right, it will pull the connecting rod 36 to rotate, so that the upper end part of the connecting rod 36 protrudes out of the baffle plate 26, and the lower end part of the two connecting rods 36 abuts against the inner wall of the matching plate 27, thereby driving the matching plate 27 to move to the right together.

[0066] In an alternative embodiment, referring to Figure 7 , Figure 8 The push plate 18 also includes a cover plate 31. When the cover plate 31 slides to the solid waste outlet 28, the cover plate 31 seals the solid waste outlet 28. When the matching plate 27 moves to the side where the solid waste outlet 28 is away from the solid waste inlet 17, the matching plate 27 and the side wall of the dehydration bin 16 form a closed space 32. The closed space 32 is connected with an air outlet pipe 33 and a pressure relief pipe 34. The air outlet pipe 33 is connected to the waste incinerator 14. A one-way valve is connected to the air outlet pipe 33, and a pressure relief valve is connected to the pressure relief pipe 34. When the matching plate 27 moves to the side away from the solid waste outlet 28, the gas in the closed space 32 will enter the waste incinerator 14 through the air outlet pipe 33. When the matching plate 27 moves to the right side of the solid waste outlet 28, the closed space 32 is formed between the right side surface of the matching plate 27 and the dehydration bin 16. At this time, there is a large amount of water vapor in the closed space 32. When the matching plate 27 continues to move to the right, a large amount of water vapor will enter the waste incinerator 14 through the air outlet pipe 33, thereby making the combustion in the waste incinerator 14 more complete. When the pressure in the closed space 32 is too high, the pressure can be released to the outside through the pressure relief pipe 34 to avoid excessive water vapor in the closed space 32. When the amount of water vapor entering the waste incinerator 14 exceeds the required amount, it affects the incineration of solid waste.

[0067] In an alternative embodiment, referring to Figure 7 , Figure 8 The connection point between the pressure relief pipe 34 and the dehydration bin 16 is located between the connection point between the air outlet pipe 33 and the dehydration bin 16 and the solid waste outlet 28. When the push plate 18 moves until the baffle plate 26 and / or the cover plate 31 abut against the inner wall of the dehydration bin 16, a pressure chamber 35 is formed between the push plate 18 and the dehydration bin 16. The pressure chamber 35 can maintain a certain positive pressure in the dehydration bin 16, so that when the matching plate 27 moves to the left, the pressure between the right side surface of the matching plate 27 and the dehydration bin 16 is always at a positive pressure, avoiding the situation where the right side surface of the matching plate 27 and the dehydration bin 16 is in a negative pressure state, and the water in the solid waste is negatively attracted to the right side of the matching plate 27 by negative pressure.

[0068] It can be understood that the conveying device 15 is a common metal mesh conveyor belt, which can effectively convey solid waste and also facilitate water in the solid waste to fall from the conveyor belt.

[0069] Embodiment 2:

[0070] An embodiment of the present application provides an organic solid waste treatment process, including an organic solid waste treatment system described in the above technical scheme, and also includes the following steps: sending the solid waste into a fermentation device for fermentation treatment; sending the solid waste discharged from the fermentation device into a feeding device 1 for cutting and extrusion to remove part of the moisture in the solid waste; extruding and dehydrating the solid waste from which part of the moisture has been removed through a drying device 11; heating and drying the extruded and dehydrated solid waste through the drying device 11; and sending the dried solid waste into a waste incinerator 14 for incineration.

[0071] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An organic solid waste treatment system, characterized in that: include: A fermentation device, wherein the fermentation device is used to perform fermentation treatment on solid waste; A feeding device (1), the feeding device (1) comprising a feeding hopper (2) and an extrusion wheel (3), the feeding hopper (2) being used to receive the solid waste discharged from the fermentation device, the extrusion wheel (3) being located at the outlet of the feeding hopper (2), the extrusion wheel (3) being used to chop and extrude the solid waste to reduce the water content in the solid waste; A drying device (11), the drying device (11) comprising a dehydration section (12) for dehydrating and a heating and drying section (13) for drying the dehydrated solid waste; and A garbage incinerator (14), wherein the garbage incinerator (14) is used to incinerate solid waste, and a conveying device (15) is provided between the feeding device (1) and the drying device (11), and between the garbage incinerator (14) and the drying device (11); wherein: The extrusion wheel (3) comprises a first rotating wheel (4) and a second rotating wheel (10) which are spaced apart and arranged side by side, a space for solid waste to pass through is formed between the first rotating wheel (4) and the second rotating wheel (10), the first rotating wheel (4) is provided with a steam injection pipe (5), the steam injection pipe (5) extends along the radial direction of the first rotating wheel (4), and the length of the steam injection pipe (5) is less than the spacing between the first rotating wheel (4) and the second rotating wheel (10), the steam injection pipe (5) is used to communicate with an external steam pipeline, the steam injection pipe (5) has a gas injection state and a closed state, when the first rotating wheel (4) rotates until the steam injection pipe (5) faces the second rotating wheel (10), the steam injection pipe (5) is in the gas injection state, and when the first rotating wheel (4) rotates until it faces away from the second rotating wheel (10), the steam injection pipe (5) is in the closed state; The dehydration part (12) comprises a dehydration bin (16), the upper side wall of the dehydration bin (16) is provided with a solid waste inlet (17), a push plate (18) and a pressure plate (19) are slidably provided in the dehydration bin (16), the pressure plate (19) can be close to / away from the push plate (18), the dehydration bin (16) comprises a feeding state and a dehydration state, the solid waste inlet (17) is located between the push plate (18) and the pressure plate (19) and when the push plate (18) and the pressure plate (19) are away from each other, the dehydration bin (16) is in a feeding state, when the push plate (18) and the pressure plate (19) are close to each other, the dehydration bin (16) is in a dehydration state, and a liquid leakage part (20) is provided in the area between the push plate (18) and the pressure plate (19); The pressing plate (19) comprises a first part (21) and a second part (22), the first part (21) being located on the upper wall side of the second part (22) close to the dehydration bin (16), the first part (21) being slidably arranged on the second part (22) along the upper wall side facing the dehydration bin (16), the first part (21) being hingedly connected with a first pushing member (23) for pushing the first part (21) to move toward the push plate (18), the second part (22) being hingedly connected with a second pushing member (24) for pushing the second part (22) to move toward the push plate (18), the first pushing member (23) being located at an end of the first part (21) away from the second part (22), and the second pushing member (24) being located at an end of the second part (22) away from the first part (21); The pressing plate (19) is provided with a clamping mechanism for clamping the solid waste on the pressing plate (19); A drying hopper (25) is provided at the solid waste inlet (17); the push plate (18) includes a baffle (26) and a matching plate (27); the baffle (26) is used to seal the solid waste inlet (17); when the dehydration bin (16) is in a feeding state, the baffle (26) and the matching plate (27) are located on the side of the solid waste inlet (17) away from the pressing plate (19); when the dehydration bin (16) is in a dehydration state, the baffle (26) seals the solid waste inlet (17); The lower side wall of the dehydration bin (16) is provided with a solid waste outlet (28); the heating and drying section (13) includes a heating box (29) arranged at the solid waste outlet (28); an opening and closing door (30) is arranged at the bottom of the heating box (29); the solid waste outlet (28) is located at the side of the solid waste inlet (17) away from the pressing plate (19); the pushing plate (18) can be moved to the side of the solid waste outlet (28) away from the solid waste inlet (17) so that the solid waste passes through the solid waste outlet (28); The push plate (18) further comprises a cover plate (31). When the cover plate (31) slides to the solid waste outlet (28), the cover plate (31) seals the solid waste outlet (28). When the matching plate (27) moves to the side where the solid waste outlet (28) is away from the solid waste inlet (17), the matching plate (27) and the side wall of the dehydration bin (16) enclose a closed space (32). An air outlet pipe (33) and a pressure relief pipe (34) are connected to the closed space (32). The air outlet pipe (33) is connected to the waste incinerator (14). A one-way valve is connected to the air outlet pipe (33). A pressure relief valve is connected to the pressure relief pipe (34). When the matching plate (27) moves to the side away from the solid waste outlet (28), the gas in the closed space (32) will enter the waste incinerator (14) through the air outlet pipe (33). The connection point between the pressure relief pipe (34) and the dehydration bin (16) is located between the connection point between the air outlet pipe (33) and the dehydration bin (16) and the solid waste outlet (28); when the push plate (18) moves until the baffle plate (26) and / or the cover plate (31) abut against the inner wall of the dehydration bin (16), a pressure chamber (35) is formed between the push plate (18) and the dehydration bin (16).

2. The organic solid waste treatment system according to claim 1, characterized in that: The steam injection pipe (5) is provided with a plurality of steam outlets spaced apart from each other, and the steam ejected from the steam outlets is arranged to face away from the first runner (4); And / or, cutters (6) are arranged at intervals on the first rotating wheel (4) and the second rotating wheel (10), and the rotation speed of the first rotating wheel (4) is lower than the rotation speed of the second rotating wheel (10).

3. The organic solid waste treatment system according to claim 1, characterized in that: The first impeller (4) comprises a fixed shaft (7) and a rotating sleeve (8) connected to the fixed shaft (7) and rotatably connected to the fixed shaft (7) along the circumferential direction of the fixed shaft (7); the steam injection pipe (5) is arranged on the rotating sleeve (8); a steam chamber (9) is arranged on the fixed shaft (7); the opening of the steam chamber (9) faces the second impeller (10); the steam chamber (9) is used to communicate with an external steam pipeline; the connection between the steam injection pipe (5) and the rotating sleeve (8) is communicated with the inside of the rotating sleeve (8); when the steam injection pipe (5) is in a gas injection state, the steam injection pipe (5) rotates to the opening of the steam chamber (9); when the steam injection pipe (5) is in a closed state, the steam injection pipe (5) rotates to the opening away from the steam chamber (9).

4. The organic solid waste treatment system according to claim 1, characterized in that: The fermentation device comprises a fermentation tank (38), a spray pipe (39), a heating pipe (40) and a stirrer (41) are arranged in the fermentation tank (38), and a feed inlet (42) and a discharge port (43) are arranged on the fermentation tank (38).

5. An organic solid waste treatment process, characterized in that: An organic solid waste treatment system comprising any one of claims 1 to 4, further comprising the following steps: The solid waste is sent to a fermentation device for fermentation treatment; The solid waste discharged from the fermentation device after fermentation is sent to the feeding device (1) for cutting and squeezing to remove part of the water in the solid waste; The solid waste from which part of the water has been removed is squeezed and dehydrated by a drying device (11); The solid waste after extrusion and dehydration is heated and dried by a drying device (11); The dried solid waste is sent to a waste incinerator (14) for incineration.

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