A kitchen waste resource utilization system

Abstract

This invention relates to a system for the resource utilization of kitchen waste. The method for the resource utilization of kitchen waste includes: Step 1, collecting kitchen waste and draining it; Step 2, breaking and crushing the drained kitchen waste; Step 3, sorting the crushed kitchen waste to separate a first material with a particle size less than or equal to a first set value and a second material with a particle size greater than the first set value; Step 4, performing solid-liquid separation on the first material to separate slurry and solid residue, and transferring the solid residue and the second material to a slag discharge room; Step 5, after sand removal, the slurry undergoes anaerobic fermentation, and the fermented biogas residue is dewatered and then aerobic composted. This method utilizes kitchen waste for crushing and sorting, followed by anaerobic fermentation to produce biogas, and then aerobic composting the biogas residue produced after anaerobic fermentation, fully utilizing kitchen waste, realizing the resource utilization of kitchen waste, and improving the utilization rate of kitchen waste.

Description

Technical Field

[0001] The present invention relates to the technical field of garbage disposal, and in particular to a kitchen waste resource utilization system. Background Art

[0002] Domestic waste is divided into four categories: recyclable waste, hazardous waste, kitchen waste, and other waste. Among them, kitchen waste is called "wet waste", which includes three subcategories: household kitchen waste, restaurant kitchen waste, and other kitchen waste. According to statistics, kitchen waste accounts for 40% to 60% of the total urban waste in my country, and is the focus and difficulty of domestic waste classification. The kitchen waste in this article specifically refers to household kitchen waste and other kitchen waste, and does not include restaurant kitchen waste. Kitchen waste is a special type of waste that has emerged under the guidance of policies. In terms of material components, kitchen waste is different from restaurant kitchen waste. The solid content and impurity rate of kitchen waste are directly affected by the front-end people's disposal behavior, so there is great instability and uncertainty. Kitchen waste in various places will inevitably have uneven impurity purity. The treatment method for kitchen waste is still similar to that of other domestic waste, which leads to a low recycling rate of kitchen waste, resulting in a waste of resources and not meeting the requirements of environmental protection and energy conservation. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a kitchen waste resource utilization system, which solves the technical problem of low kitchen waste recycling.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the kitchen waste resource utilization system of the present invention is implemented based on the kitchen waste resource utilization system;

[0007] The kitchen waste resource utilization system comprises: a material collecting device, a first crushing device, a sorting device, a second crusher, a solid-liquid separation device, a sand removal device, an anaerobic fermentation device and an aerobic composting device;

[0008] The material receiving device is connected to the first crushing device via a first screw feeder, and the first crushing device is connected to the sorting device via a second screw feeder;

[0009] The sorting device is provided with an outlet for undersize and an outlet for oversize, the outlet for undersize is connected to the second crushing device through a plurality of third screw feeders, the outlet of the second crushing device is connected to the solid-liquid separation device, and the outlet for oversize is connected to the slag discharge room through a fourth screw feeder;

[0010] The solid-liquid separation device is provided with a slurry outlet, and the slurry outlet is connected to the anaerobic fermentation device through the sand removal device;

[0011] The anaerobic fermentation device is provided with a biogas residue outlet, and the biogas residue outlet is connected to the aerobic composting device;

[0012] The method for resource utilization of kitchen waste comprises:

[0013] S1. Collect the kitchen waste and drain it;

[0014] S2, the first crushing device breaks the bag and crushes the drained kitchen waste;

[0015] S3, the sorting device sorts the crushed kitchen waste into a first material with a particle size less than or equal to a first set value and a second material with a particle size greater than the first set value;

[0016] S4, the first material is finely crushed by the second crushing device and then subjected to solid-liquid separation by the solid-liquid separation device to separate slurry and solid slag, and the solid slag and the second material are transported to a slag discharge room for packaging;

[0017] S5. After the slurry is desanded by the desanding device, it is transported to the anaerobic fermentation device for anaerobic fermentation. After the fermented biogas residue is dehydrated, it is transported to the aerobic composting device for aerobic composting.

[0018] Optionally, step S3 includes:

[0019] S31, screening the crushed kitchen waste for the first time, screening out a third material and a fourth material whose particle size is less than or equal to a second set value;

[0020] S32, the fourth material is transferred to the slag discharge room, the third material is subjected to a second screening after being vibrated and magnetically separated to remove metal impurities, and a first material having a particle size less than or equal to a first set value and a second material having a particle size greater than the first set value are screened out.

[0021] Optionally, the first setting value is 80 mm to 120 mm, and the second setting value is 150 mm to 250 mm.

[0022] Optionally, the first crushing device includes a crushing box, a crushing barrel, a blade, a main shaft and a plurality of scissor-fork mechanisms;

[0023] The crushing box is provided with an inlet and an outlet, the inlet of the crushing box is connected to the first screw feeder, and the outlet of the crushing box is connected to the second screw feeder;

[0024] The main shaft is rotatably arranged in the crushing box, and a sliding block capable of sliding along the axial direction of the main shaft is arranged on the main shaft;

[0025] The crushing cylinder comprises a plurality of arc-shaped crushing plates sequentially arranged along the circumferential direction, the inner surface of each arc-shaped crushing plate is connected to the main shaft through a scissor mechanism, and the blade is arranged on the outer surface of the arc-shaped crushing plate;

[0026] The scissor-fork mechanism includes a first cross rod and a second cross rod that are cross-arranged and hinged to each other, the first ends of the first cross rods are slidably connected to the inner surface of the arc-shaped crushing plate, the first end of the second cross rod is hinged to the inner surface of the arc-shaped crushing plate, the second end of the first cross rod is hinged to the main shaft, and the second end of the second cross rod is hinged to the slider.

[0027] Optionally, the first crushing device further includes a saw blade, a saw seat and a sliding shaft;

[0028] The saw seat is arranged on the main shaft, the saw blade is located in the crushing cylinder, and the blade of the saw blade faces the intersection of two adjacent arc-shaped crushing plates; the saw blade is provided with a first sliding rod and a second sliding rod;

[0029] A guide groove is arranged in the sliding block along the radial direction of the crushing cylinder, and one end of the first sliding rod is slidably arranged in the guide groove;

[0030] The saw seat comprises two saw plates parallel to each other, each of which is provided with a sliding bevel groove, the distance between the first end of the sliding bevel groove and the slider is smaller than the distance between the second end of the sliding bevel groove and the slider, the first end and the second end of the sliding bevel groove are opposite ends, the first end of the sliding bevel groove is an end close to the main shaft, and the second end of the sliding bevel groove is an end close to the saw blade;

[0031] The second sliding rod is provided with a sliding hole corresponding to the sliding bevel groove. The second sliding rod is located between the two saw plates. The sliding shaft sleeve is arranged in the sliding bevel groove and the sliding hole.

[0032] Optionally, the main shaft rotating sleeve is provided with a driving disk, the driving disk is provided with a threaded connection portion protruding along the axial direction of the main shaft, and the threaded connection portion is provided with an external thread;

[0033] The slider is provided with an internal threaded hole matched with the threaded connection, and the threaded connection part is threadedly connected to the slider.

[0034] Optionally, an adjustment mechanism and an adjustment plate are provided in the crushing box, the adjustment plate is rotatably provided in the crushing box, the adjustment plate is located below the entrance of the crushing box, and the adjustment mechanism can adjust the distance between the adjustment plate and the blade.

[0035] Optionally, the aerobic composting device comprises a tank, a driving mechanism and a plurality of composting mechanisms;

[0036] The tank body is a hollow cylinder, and is vertically arranged. An end plate is arranged at the upper end of the tank body, and a feed port and an axis mounting hole are provided on the end plate, and the sludge outlet is connected to the feed port; the lower end opening of the tank body is connected to a conical funnel, and a discharge port is provided on the conical funnel;

[0037] The driving mechanism comprises a driving assembly and a linkage shaft, wherein the driving assembly is arranged on the tank body, the linkage shaft is vertically arranged in the tank body, and the linkage shaft sleeve is arranged in the shaft mounting hole; the driving assembly is connected to the linkage shaft, and the driving assembly can drive the linkage shaft to rotate and move up and down;

[0038] A plurality of composting mechanisms are arranged in the tank body at intervals along the vertical direction, and the composting mechanism comprises a supporting assembly and a compost turning assembly; the supporting assembly is connected to the inner wall of the tank body, and the supporting assembly is used for stacking kitchen waste sludge; the compost turning assembly is rotatably arranged on the supporting assembly, and the linkage shaft can be connected to the compost turning assembly to drive the compost turning assembly to rotate.

[0039] Optionally, the compost turning assembly includes a sleeve, a first gear and a plurality of stirring units;

[0040] The sleeve is rotatably connected to the support assembly;

[0041] The first gear is sleeved on the linkage shaft, the sleeve is vertically arranged, a first tooth groove matching the first gear is formed in the sleeve, and the first gear is sleeved in the first tooth groove;

[0042] The stirring unit comprises a scraper, a toothed stirring blade, a first connecting member and a second connecting member;

[0043] The scraper and the toothed stirring blade are both rotatably connected to the first connecting member, and the linkage shaft can be drivingly connected to the first connecting member;

[0044] The scraper and the toothed stirring blade are both rotatably connected to the second connecting member, and the second connecting member is rotatably connected to the sleeve.

[0045] Optionally, the first connecting member includes a first connecting arm, a driving shaft, a first bevel gear and a second bevel gear, and the second connecting member includes a second connecting arm and a driven shaft;

[0046] The sleeve is provided with a first mounting hole and a second mounting hole, the central axes of the first mounting hole and the second mounting hole both pass through the central axis of the linkage shaft, and the first mounting hole is located below the second mounting hole;

[0047] The driving shaft is rotatably sleeved in the first mounting hole, and the driven shaft is rotatably disposed in the second mounting hole;

[0048] The first bevel gear is sleeved on the linkage shaft, and the second bevel gear is sleeved on the first end of the driving shaft. After the linkage shaft moves downward by a second set distance, the first bevel gear can mesh with the second bevel gear.

[0049] The first connecting arm is connected to the second end of the driving shaft, and the second connecting arm is connected to the driven shaft;

[0050] The first ends of the first connecting arm and the second connecting arm are both rotatably connected to the scraper, and the second ends of the first connecting arm and the second connecting arm are both rotatably connected to the toothed stirring blade.

[0051] Optionally, the support assembly includes a first baffle, a second baffle and a second gear;

[0052] The first partition is connected to the inner wall of the tank body, and a plurality of first through holes are evenly formed on the first partition;

[0053] The second partition is rotatably connected to the first partition, the second partition abuts against the lower surface of the first partition, a plurality of second through holes are evenly opened on the second partition, and the positions of the plurality of first through holes and the plurality of second through holes can correspond one to one;

[0054] The second gear is sleeved on the linkage shaft, and a second tooth groove matching the second gear is formed on the second partition plate. After the linkage shaft moves upward by a set distance, the second gear can be sleeved in the second tooth groove.

[0055] Optionally, the anaerobic fermentation device comprises a removal unit, a slurry temporary storage tank, a hydrolysis unit, an anaerobic fermentation unit, a biogas residue temporary storage tank and a centrifugal dehydrator which are connected in sequence;

[0056] The impurity removal unit is connected to the slurry outlet, and the centrifugal dehydrator is provided with the biogas residue outlet;

[0057] The anaerobic fermentation unit is provided with a biogas outlet and a biogas residue liquid outlet, the biogas outlet is connected to a biogas storage device, and the biogas residue liquid outlet is connected to the biogas residue liquid temporary storage tank;

[0058] The centrifugal dehydrator is connected to a flocculant storage box, and the flocculant storage box is used to add flocculant into the centrifugal dehydrator.

[0059] (III) Beneficial effects

[0060] The kitchen waste resource utilization system of the present invention performs anaerobic fermentation to produce biogas after crushing and sorting the kitchen waste, and then performs aerobic composting on the biogas residue produced after the anaerobic fermentation, so as to make full use of the useful components in the kitchen waste, realize the resource utilization of the kitchen waste, realize the harmless treatment of the kitchen waste, and effectively improve the utilization rate of the kitchen waste. The whole set of equipment runs automatically, automatically sorts and processes the collected kitchen waste, and reduces the operating intensity of the operators to the maximum extent, saving the investment of labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a flow chart of the method for resource utilization of kitchen waste of the present invention;

[0062] Figure 2 It is a partial structural schematic diagram of the kitchen waste resource utilization system of the present invention;

[0063] Figure 3 It is a cross-sectional view of the first crushing device of the kitchen waste resource utilization system of the present invention;

[0064] Figure 4 for Figure 3 The cross-sectional view at FF;

[0065] Figure 5 for Figure 4 Enlarged view at C;

[0066] Figure 6 It is a schematic diagram of the arc-shaped crushing plates 51 in the first crushing device of the kitchen waste resource utilization system of the present invention being separated from each other;

[0067] Figure 7 A three-dimensional diagram of a first crushing device of the kitchen waste resource utilization system of the present invention;

[0068] Figure 8 It is a partial structural schematic diagram of the first crushing device of the kitchen waste resource utilization system of the present invention;

[0069] Fig. 9 It is a front view of an aerobic composting device of the kitchen waste resource utilization system of the present invention;

[0070] Fig.10 It is a structural schematic diagram of a composting mechanism of an aerobic composting device of a kitchen waste resource utilization system of the present invention;

[0071] Fig.11 A top view of an aerobic composting device of the kitchen waste resource utilization system of the present invention;

[0072] Fig.12 for Fig.11 The cross-sectional view at AA in FIG.

[0073] Fig.13 for Fig.12 The enlarged view at B in the figure;

[0074] Fig.14 It is a process flow chart of the kitchen waste resource utilization system of the present invention.

[0075] [Description of Reference Numerals]

[0076] 101: first crushing device; 102: sorting device; 103: solid-liquid separation device; 105: anaerobic fermentation device; 112: second screw feeder; 113: third screw feeder;

[0077] 1: tank body; 11: end plate; 12: feed port; 13: conical funnel; 14: vent; 15: exhaust gas collection port;

[0078] 2: linkage axis;

[0079] 3: Composting organization;

[0080] 31: support assembly; 311: first baffle; 312: second baffle; 313: second gear; 314: second tooth groove;

[0081] 32: compost turning assembly; 321: sleeve; 322: first gear; 323: first tooth groove; 324: scraper; 325: toothed stirring blade; 326: first connecting arm; 327: driving shaft; 328: first bevel gear; 329: second bevel gear; 331: second connecting arm; 332: driven shaft; 333: mounting arm; 334: scraping teeth;

[0082] 4: crushing box 4; 41: adjustment mechanism 41; 42: adjustment plate 42; 43: turntable 43;

[0083] 5: crushing cylinder 5; 51: arc-shaped crushing plate 51;

[0084] 6: Blade 6;

[0085] 7: spindle; 71: slider; 72: drive plate;

[0086] 8: scissor mechanism; 81: first cross bar; 82: second cross bar;

[0087] 9: saw blade; 91: first sliding rod; 92: second sliding rod; 93: dirt baffle; 94: saw seat; 95: saw plate; 96: sliding bevel groove. DETAILED DESCRIPTION

[0088] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. Figure 2 The orientation is used as a reference.

[0089] Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0090] like Figure 1 As shown, the present invention provides a method for resource utilization of kitchen waste, which is implemented based on a kitchen waste resource utilization system. The method for resource utilization of kitchen waste includes:

[0091] Step 1: Collect and drain the kitchen waste;

[0092] Step 2: The first crushing device breaks the bag of the drained kitchen waste and crushes it;

[0093] Step 3: The sorting device sorts the crushed kitchen waste into a first material having a particle size less than or equal to a first set value and a second material having a particle size greater than the first set value;

[0094] Step 4: After the first material is finely crushed by the second crushing device, it is subjected to solid-liquid separation by the solid-liquid separation device to separate the slurry and solid slag, and the solid slag and the second material are transported to the slag discharge room for packaging;

[0095] Step 5: After the slurry is desanded by the desanding device, it is transported to the anaerobic fermentation device for anaerobic fermentation. After the fermented biogas residue is dehydrated, it is transported to the aerobic composting device for aerobic composting.

[0096] Step three includes: screening the crushed kitchen waste for the first time, screening out the third material and the fourth material with a particle size less than or equal to the second set value; transferring the fourth material to the slag discharge room, and screening out the third material for the second time after vibrating and magnetic separation to remove metal impurities, screening out the first material with a particle size less than or equal to the first set value and the second material with a particle size greater than the first set value. The first set value is 80mm~120mm, and the second set value is 150mm~250mm.

[0097] Specifically, see Fig.14After the kitchen waste enters the site, it is unloaded into the kitchen waste pit. The pit grab sends the kitchen waste to the coarse crusher hopper. A level meter is installed in the hopper to detect the material feeding situation, so as to control the feeding speed and feeding amount. After entering the hopper, the kitchen waste is crushed by the coarse crusher. The kitchen waste with a particle size less than or equal to 200mm is escorted to the vibrating bulk feeder by a double spiral. A magnetic separator is installed above the vibrating bulk feeder to remove metal by magnetic separation. The remaining material enters the drum screen (screen aperture 100mm) for further screening. The particle size of the screened material is less than or equal to 100mm. The screened material is sent to the fine crusher for crushing again, and then transported to the water squeezer to separate the material debris from the slurry. The debris with a particle size greater than 200mm after crushing and greater than 100mm after drum screen screening are transported to the slag discharge room for packaging and packaging. There is no need to use a transfer vehicle to transfer to the transfer station and pour it into the pit before transferring it to the incineration site. Direct compression and packaging saves the internal transfer link. The slurry will enter the sand removal system for treatment. The screened material is conveyed to fine crushing by spiral conveyor. The material after fine crushing is conveyed to the sand removal system through a pipeline. The intermediate homogeneous material is conveyed to the extrusion dehydrator for treatment by spiral conveyor. The debris is conveyed to the slag removal room by spiral conveyor. The solid phase material is squeezed to a moisture content of less than 65%. The loss rate of organic waste is minimized. The extruded dehydrated slurry enters the slurry pool, which also has a sand removal function. The gravel at the bottom can be cleaned regularly. The extruded dehydrated solid slag is transported and disposed of together with other screened solid slag, screened material, etc. After sand and slag removal, it enters the slurry pool. The material passing through the slurry pool enters anaerobic fermentation after sedimentation. All system equipment and conveying equipment adopt reasonable sealing measures, and the equipment and conveying equipment are equipped with spray deodorization systems and dust removal pipes along the way, so that the odor can be effectively collected, allowing the entire system to work stably in a dust-free and odor-free environment. A flange interface is provided above the discharge end of the screw conveyor, which can be connected to the exhaust pipe so that the odor inside the screw conveyor can be effectively collected. The fermented biogas residue is dehydrated and then aerobic composted. The method of recycling kitchen waste resources is to crush and sort the kitchen waste and then perform anaerobic fermentation to produce biogas, and then aerobic composting is performed on the biogas residue produced after anaerobic fermentation, so as to make full use of the useful components in the kitchen waste, realize the resource utilization of kitchen waste, realize the harmless treatment of kitchen waste, and effectively improve the utilization rate of kitchen waste. The whole set of equipment runs automatically, automatically sorts and processes the collected kitchen waste, and minimizes the operating intensity of operators and saves labor costs.

[0098] like Figure 2 and Fig.14As shown, the kitchen waste resource utilization system includes a receiving device, a first crushing device 101, a sorting device 102, a second crushing device, a solid-liquid separation device 103, a sand removal device 104, an anaerobic fermentation device 105, and an aerobic composting device. The receiving device is used to receive kitchen waste, and the receiving device is connected to the first crushing device 101 through a first screw feeder. The first screw feeder transfers the kitchen waste in the receiving device to the first crushing device 101 for crushing treatment, and crushes it into materials with a particle size of less than or equal to 200 mm. The first crushing device 101 is connected to the sorting device 102 through the second screw feeder 112. The sorting device 102 is used to screen the crushed materials. The sorting device includes a first screening device, a vibrating bulk feeder, a magnetic separator and a drum screen which are connected in sequence. The kitchen waste with a particle size less than or equal to 200 mm screened out by the first screening device is conveyed to the vibrating bulk feeder through a double spiral escort. A magnetic separator is arranged above the vibrating bulk feeder to remove metals through magnetic separation. The remaining materials enter the drum screen (screen aperture 100 mm) for further screening. Materials with a particle size less than or equal to 100 mm that can pass through the screen are output from the underscreen outlet, and materials with a particle size greater than 100 mm that cannot pass through the screen are output from the overscreen outlet. The underscreen outlet is connected to the second crushing device through multiple third screw feeders 113. The second crushing device is used to further finely crush the undersize material. The discharge port of the second crushing device is connected to the solid-liquid separation device 103. The finely crushed material is transported to the solid-liquid separation device 103 through the third screw feeder 113 for solid-liquid separation. The outlet of the oversize material is connected to the slag discharge room through the fourth screw feeder, and is transported out of the slag discharge room and then harmlessly treated. A slurry outlet is provided on the solid-liquid separation device 103. The solid-liquid separation device 103 is preferably an extrusion dehydrator, which performs extrusion dehydration treatment on the undersize material after sorting, and squeezes out the free water in the material as much as possible through the extruder, and the free water is output from the slurry outlet. The extrusion dehydrator is a device designed and manufactured based on the characteristics of organic waste materials and feedback from actual applications of engineering projects. The extrusion dehydrator uses a movable screen frame, a hydraulic cylinder, a rotation resistance switch, current tracking, and related control technologies to monitor and automatically control the torque of the screw shaft in real time to ensure the optimal dryness and stable effect of the exported squeezed material. The slurry outlet is connected to the temporary storage tank, and the temporary storage tank is connected to the sand removal device 104 through a transportation device. The sand removal device is used to remove sand from the slurry to avoid damage to the equipment. The transportation device is used to transport the slurry in the temporary storage tank to the sand removal device 104. The sand removal device is connected to the anaerobic fermentation device 105. The slurry enters the anaerobic fermentation device after sand removal. The slurry produces biogas and biogas residue liquid through anaerobic fermentation. The anaerobic fermentation device 105 is provided with a biogas residue outlet. The biogas residue liquid is dehydrated to form biogas, and the biogas residue is output from the biogas residue outlet. The biogas residue outlet is connected to the aerobic composting device, and the biogas residue is transported to the aerobic composting device for aerobic fermentation.The kitchen waste resource utilization system of the present invention performs anaerobic fermentation to produce biogas after crushing and sorting the kitchen waste, and then performs aerobic composting on the biogas residue produced after the anaerobic fermentation, so as to make full use of the useful components in the kitchen waste, realize the resource utilization of the kitchen waste, realize the harmless treatment of the kitchen waste, and effectively improve the utilization rate of the kitchen waste. The whole set of equipment runs automatically, automatically sorts and processes the collected kitchen waste, and reduces the operating intensity of the operators to the maximum extent, saving the investment of labor costs.

[0099] like Figures 3 to 8 As shown, the first crushing device 101 includes: a crushing box 4, a crushing barrel 5, a blade 6, a main shaft 7 and a scissor mechanism 8. The crushing box 4 is provided with an inlet and an outlet for materials. The inlet of the crushing box 4 is connected to the outlet of the first screw feeder, and the outlet of the crusher is connected to the inlet of the second screw feeder 112. Among them, the main shaft 7 is rotatably arranged in the crushing box 4, and a slider 71 is slidably arranged on the main shaft 7. The slider 71 can move along the axial direction of the main shaft 7, and the slider 71 cannot rotate relative to the main shaft 7. The crushing barrel 5 is divided into a plurality of arc-shaped crushing plates 51 along its own circumferential direction. The arc-shaped crushing plates 51 can be connected in sequence to form a cylindrical structure. The inner surfaces of the arc-shaped crushing plates 51 are connected to the main shaft 7 through the scissor mechanism 8, and the outer surfaces of the arc-shaped crushing plates 51 are provided with blades 6. In the normal working process, the main shaft 7 drives the crushing barrel 5 to rotate through the scissor mechanism 8, and then drives the blade 6 to rotate, so as to realize the blade 6 to crush the kitchen waste. At this time, the scissor mechanism 8 plays the role of transmitting the torque of the main shaft 7 to the crushing barrel 5. During the processing of kitchen waste, harmful gases such as hydrogen sulfide and sulfur dioxide will be generated, so a blowing device will be installed on the crushing box 4, wherein the blowing device is arranged close to the garbage inlet. The blowing device can blow air into the crushing box 4, so that the harmful gases in the crushing box 4 can be discharged from the outlet of the crushing box 4 in time, and the concentration of the harmful gases in the crushing box 4 can be controlled to avoid corrosion of the devices in the crushing box 4.

[0100] like Figure 4As shown, the scissor mechanism 8 includes a first cross bar 81 and a second cross bar 82 which are cross-arranged and hinged to each other, one end of the first cross bar 81 is slidably connected to the inner surface of the arc-shaped crushing plate 51, and the second end of the first cross bar 81 is hinged to the main shaft 7; the first end of the second cross bar 82 is hinged to the inner surface of the arc-shaped crushing plate 51, and the second end of the second cross bar 82 is hinged to the slider 71. In this embodiment, the hinge point of the first cross bar 81 and the second cross bar 82 is located in the middle position, and the axial movement of the slider 71 on the main shaft 7 can drive the arc-shaped crushing plate 51 to move radially along the crushing barrel 5 through the scissor mechanism 8, that is, when the slider 71 moves along the main shaft 7, it can control the arc-shaped crushing plate 51 to move radially along the crushing barrel 5 through the scissor mechanism 8, so as to separate or connect with each other. The axial movement of the slider 71 on the main shaft 7 drives the arc-shaped crushing plate 51 to move radially along the crushing barrel 5. At this time, the multiple arc-shaped crushing plates 51 are separated from each other, and the distance between the arc-shaped crushing plates 51 increases, thereby causing the windings wound on the crushing barrel 5 to break or the windings on the crushing barrel 5 to separate from the crushing barrel 5. In addition, when the arc-shaped crushing plate 51 moves, the blade 6 on the arc-shaped crushing plate 51 will also cut the windings wound around itself, thereby improving the effect of breaking the windings and avoiding the windings from winding around the crushing barrel 5 and the blade 6.

[0101] like Figure 5 As shown, the main shaft 7 is also provided with a driving disk 72, which is sleeved on the main shaft 7. The driving disk 72 is provided with a threaded connection portion protruding along the axial direction of the main shaft 7, and the threaded connection portion is provided with an external thread. The slider 71 is provided with an internal thread hole matched with the threaded connection, and the driving disk 72 can rotate around the main shaft 7 but cannot slide along the main shaft 7. After the winding occurs, the rotation of the main shaft 7 can be stopped, and the driving disk 72 can be driven to rotate. The threaded connection portion on the driving disk 72 drives the slider 71 to move along the axial direction of the main shaft 7, and then drives the scissor mechanism 8 to move, so as to automatically clean up the winding. Under normal working conditions, the slider 71 rotates with the main shaft 7. At this time, the internal threaded hole on the slider 71 and the threaded connection portion are locked by threads. There is no relative rotation between the slider 71 and the driving disk 72. The driving disk 72 rotates with the slider 71, which does not affect the normal crushing work of the first crushing device 101. The driving disk 72 can be a gear.

[0102] like Figure 6As shown, the first crushing device 101 also includes: a saw blade 9 and a saw seat 94. The saw seat 94 is fixedly arranged on the main shaft 7, the saw blade 9 is located in the crushing barrel 5 and the blade of the saw blade 9 faces the intersection of two adjacent arc-shaped crushing plates 51, a first sliding rod 91 is fixedly arranged near the first end of the saw blade 9, and a second sliding rod 92 is fixedly arranged at the second end of the saw blade 9; the first sliding rod 91 is slidably connected to the slider 71, and the second sliding rod 92 is slidably arranged in the saw seat 94, the slider 71 can push the saw blade 9 to move along the radial direction of the crushing barrel 5, and the blade of the saw blade 9 extends out of the crushing barrel 5 (that is, when the arc-shaped crushing plates 51 move along the radial direction of the crushing barrel 5, multiple arc-shaped crushing plates 51 are separated from each other, and the blade of the saw blade 9 protrudes from the outer surface of the arc-shaped crushing plates 51). In this embodiment, considering that the kitchen waste may be mixed with flexible materials such as garbage bags, textiles, ropes, etc., when the arc-shaped crushing plates 51 move along the radial direction of the crushing cylinder 5, the multiple arc-shaped crushing plates 51 are separated from each other, and the distance between the arc-shaped crushing plates 51 increases, the materials wound on the arc-shaped crushing plates 51 are still not broken. At this time, the saw blade 9 extends out of the crushing cylinder 5 under the action of the slider 71, and the blade of the saw blade 9 extends out of the crushing cylinder 5 to cut the flexible winding materials, see Figure 8 The first sliding rod 91 and the second sliding rod 92 are both arranged at the back of the saw blade 9 .

[0103] like Figure 6As shown, the saw seat 94 includes two saw plates 95 parallel to each other, each of which is provided with a sliding bevel groove 96, and the second sliding rod 92 is provided with a sliding hole corresponding to the sliding bevel groove 96. The second sliding rod 92 is arranged between the two saw plates 95. The second sliding rod 92 is arranged between the two saw plates 95 to avoid affecting the sliding of the second sliding rod 92, and the second sliding rod 92 can slide along the sliding bevel groove 96. The specific connection method of the second sliding rod 92 and the saw seat 94 can be: the sliding hole and the sliding bevel groove 96 are connected by a sliding shaft, and the sliding shaft can pass through the sliding bevel groove 96 and the sliding hole. The sliding shaft can slide in the sliding bevel groove 96, and the sliding shaft can rotate with the second sliding rod 92, the sliding bevel groove 96, or both. The distance between the first end of the sliding bevel 96 and the slider 71 is smaller than the distance between the second end of the sliding bevel 96 and the slider 71. The first end and the second end of the sliding bevel 96 are two opposite ends of the sliding bevel 96. The first end of the sliding bevel 96 is the end close to the main shaft 7, and the second end of the sliding bevel 96 is the end close to the saw blade 9. The above arrangement ensures that when the slider 71 drives the arc-shaped crushing plate 51 and the saw blade 9 to move at the same time (the slider 71 drives the second cross bar in the scissor mechanism 8 to move, and then drives the arc-shaped crushing plate 51 to move along the radial direction of the crushing barrel 5 through the scissor mechanism 8. The slider 71 can also push the saw blade 9 to move along the radial direction of the crushing barrel 5), the movement speed of the saw blade 9 in the radial direction of the crushing barrel 5 is greater than the speed of the arc-shaped crushing plate 51 in the radial direction of the crushing barrel 5, so that the blade of the saw blade 9 can protrude from the outer surface of the arc-shaped crushing plate 51, thereby achieving a cutting effect on the winding. In addition, when the slider 71 pushes the first sliding rod 91, since the sliding bevel 96 is a bevel, the movement of the slider 71 along the main shaft 7 is converted into movement along the sliding bevel 96 (at this time, there is a sub-movement along the radial direction of the crushing barrel 5), thereby driving the saw blade 9 to move along the sliding bevel 96 as a whole and then extend out of the crushing barrel 5 to cut the winding. In a preferred embodiment, the distance from the point on the first sliding rod 91 where the slider 71 is hinged to the main shaft 7 is smaller than the distance from the point on the second sliding rod 92 where the saw seat 94 is hinged to the main shaft 7. This allows the slider 71 to push the second sliding rod 92 to move along the sliding bevel 96 toward the outside of the crushing barrel 5 when it moves along the main shaft 7.

[0104] A guide groove is provided in the slider 71 along the radial direction of the crushing barrel 5, and one end of the first sliding rod 91 is slidably provided in the guide groove. In addition, the direction of the guide groove can also be symmetrical with the direction of the sliding inclined groove 96 about the radial direction of the main shaft 7, that is, the distance between the first end of the guide groove and the second sliding rod 92 is smaller than the distance between the second end of the guide groove and the second sliding rod 92, wherein the first end of the guide groove is the end of the guide groove close to the main shaft 7, and the second end of the guide groove is the end of the guide groove close to the saw blade 9.

[0105] like Figure 6 and Figure 7 As shown, the saw blade 9 is provided with a dirt shield 93 parallel to the main shaft 7, and the dirt shield 93 is perpendicular to the saw blade 9. When the saw blade 9 extends out of the crushing barrel 5, the dirt shield 93 can fit with the inner surfaces of the two adjacent arc-shaped crushing plates 51. In this embodiment, after the two adjacent arc-shaped crushing plates 51 are separated along the radial movement of the crushing barrel 5, the dirt shield 93 can better fit with the adjacent arc-shaped crushing plates 51, so that the gap between the two adjacent arc-shaped crushing plates 51 is filled by the dirt shield 93, the kitchen waste will not fall into the crushing barrel 5, the main shaft 7 is protected from being submerged by the kitchen waste, the main shaft 7 will not be oxidized too quickly, and the service life of the main shaft 7 is increased.

[0106] like Figure 3 As shown, the crushing box 4 is provided with an inlet and an outlet for materials, the inlet of the crushing box 4 is connected to the outlet of the first screw feeder, and the outlet of the crusher is connected to the inlet of the second screw feeder 112. The crushing barrel 5 is located below one side of the inlet, and an adjustment mechanism 41 and an adjustment plate 42 are provided in the crushing box 4. The adjustment plate 42 is rotatably provided in the crushing box 4, and the adjustment plate 42 is located below the other side of the inlet. The adjustment mechanism 41 can adjust the distance between the adjustment plate 42 and the blade 6. The adjustment mechanism 41 can be a hydraulic cylinder, wherein one end of the hydraulic cylinder is hinged to the crushing box 4, and the other end of the hydraulic cylinder is hinged to the adjustment plate 42. The hydraulic cylinder controls the rotation of the adjustment plate 42, and adjusts the gap between the adjustment plate 42 and the blade 6 to determine the discharge size of the crusher. The crushing box 4 is provided with an outlet for materials, and a turntable 43 is also rotatably provided in the crushing box 4, and the turntable 43 can control the opening and closing of the outlet. When debris is entangled on the crushing drum 5, the main shaft 7 stops rotating, the crushing equipment stops working, and the turntable 43 rotates a certain angle to discharge the material from the outlet, ensuring that the entangled objects no longer enter the material and affect the rear-end equipment.

[0107] like Fig. 9 and Fig.10As shown, the aerobic composting device includes a tank body 1, a driving mechanism and a plurality of composting mechanisms 3. The tank body 1 is a hollow cylinder with openings at both ends, and the tank body 1 is arranged vertically when in use. The driving mechanism includes a driving assembly and a linkage shaft 2, the driving assembly is arranged on the tank body 1, the linkage shaft 2 is vertically arranged in the tank body 1, the driving assembly is connected to the linkage shaft 2, and the driving assembly can drive the linkage shaft 2 to rotate and move up and down. A plurality of composting mechanisms 3 are arranged in the tank body 1 at intervals in the vertical direction, and the tank body 1 is divided into a plurality of separate spaces, each of which can be used to stack kitchen waste sludge, and the space of the tank body 1 is effectively utilized. Among them, the composting mechanism 3 includes a supporting assembly 31 and a compost turning assembly 32, the supporting assembly 31 is connected to the inner wall of the tank body 1, and the supporting assembly 31 is used to stack kitchen waste sludge. The compost turning assembly 32 is rotatably arranged on the supporting assembly 31, and the linkage shaft 2 can be connected to the compost turning assembly 32 to drive the compost turning assembly 32 to rotate. The compost turning components 32 of the multiple composting mechanisms 3 are driven to rotate simultaneously by the linkage shaft 2, so that the food waste sludge on each support component 31 is turned and stirred, and the food waste sludge is fully and evenly mixed to prevent the food waste sludge from being compacted, thereby effectively improving the efficiency and effect of aerobic composting; and, by stacking in layers and turning and stirring, the space of the tank body 1 is effectively utilized while ensuring aerobic reaction. The food waste sludge on the support component 31 is loosened by stirring and turning, which reduces the difficulty of ventilation. When processing the same volume of food waste sludge, the volume of the tank body 1 required for layered composting is smaller, thereby reducing the floor space of the tank body 1.

[0108] like Fig.11 and Fig.12 As shown, the compost turning assembly 32 includes a sleeve 321, a first gear 322 and a plurality of stirring units. The sleeve 321 is rotatably connected to the first partition 311 of the support assembly 31 through a bearing, and a plurality of stirring units are evenly arranged on the outer wall of the sleeve 321 along the circumference of the sleeve 321. The present invention preferably has four stirring units, and adjacent stirring units are spaced 90° apart from each other. The first gear 322 is sleeved on the linkage shaft 2, and the first gear 322 is located in the sleeve 321. The sleeve 321 is vertically arranged, and a first tooth groove 323 matching the first gear 322 is opened in the sleeve 321. The driving component drives the linkage shaft 2 to move up and down, and the linkage shaft 2 switches between the first state, the second state and the third state; when the linkage shaft 2 is in the first state, the first gear 322 is sleeved in the first tooth groove 323, and the linkage shaft 2 transmits power to the sleeve 321 through the first gear 322 and the first tooth groove 323 that cooperate with each other, thereby driving the sleeve 321 to rotate, and the sleeve 321 then drives multiple stirring units to rotate, thereby stirring and turning the kitchen waste sludge located on the support component 31.

[0109] Furthermore, if Fig.12 and Fig.13As shown, the stirring unit includes a scraper 324, a toothed stirring blade 325, a first connecting member and a second connecting member. The scraper 324 and the toothed stirring blade 325 are both rotatably connected to the first connecting member, and the linkage shaft 2 can be driven and connected to the first connecting member. The scraper 324 and the toothed stirring blade 325 are both rotatably connected to the second connecting member, and the second connecting member is rotatably connected to the sleeve 321. Specifically, the first connecting member includes a first connecting arm 326, a driving shaft 327, a first bevel gear 328 and a second bevel gear 329, and the second connecting member includes a second connecting arm 331 and a driven shaft 332. The sleeve 321 is provided with a first mounting hole and a second mounting hole, and the central axis of the first mounting hole and the second mounting hole both pass through the central axis of the linkage shaft 2, and the first mounting hole is located directly below the second mounting hole. The driving shaft 327 is rotatably sleeved in the first mounting hole, and the driven shaft 332 is rotatably set in the second mounting hole. The first bevel gear 328 is sleeved on the linkage shaft 2, and the second bevel gear 329 is sleeved on the first end of the drive shaft 327. After the driving assembly drives the linkage shaft 2 to move downward from the first state to the second set distance, the linkage shaft 2 is in the second state, at which time the first bevel gear 328 can mesh with the second bevel gear 329. The second set distance is the distance between the first bevel gear 328 and the second bevel gear 329 when the linkage shaft 2 is in the first state. The middle part of the first connecting arm 326 is fixedly connected to the second end of the drive shaft 327, and the first connecting arm 326 rotates with the drive shaft 327. The middle part of the second connecting arm 331 is fixedly connected to the driven shaft 332, and the second connecting arm 331 rotates with the driven shaft 332. The first ends of the first connecting arm 326 and the second connecting arm 331 are both rotatably connected to the side of the scraper 324, and the second ends of the first connecting arm 326 and the second connecting arm 331 are both rotatably connected to the side of the toothed stirring blade 325. A parallelogram is formed by the first connecting arm 326, the second connecting arm 331, the side of the scraper 324 and the side of the toothed stirring blade 325; and the driving shaft 327 limits the first connecting arm 326, and the driven shaft 332 limits the second connecting arm 331, so that the first connecting arm 326 and the second connecting arm 331 can only rotate around their own midpoints. When the linkage shaft 2 drives the driving shaft 327 to rotate, the scraper 324 and the toothed stirring blade 325 move vertically up and down. Therefore, the driving shaft 327 can be driven to rotate by the connection structure of the linkage shaft 2 in the second state, and then it is selected to use the scraper 324 to flatten the compost or to use the toothed stirring blade 325 to stir, mix and turn the compost; in addition, the height of the material compost can be adjusted by controlling the height of the scraper 324.

[0110] like Fig.13 As shown, the toothed stirring blade 325 includes a mounting arm 333 and a plurality of upper scraping teeth 334 spaced apart from each other on the mounting arm 333 , and the second ends of the first connecting arm 326 and the second connecting arm 331 are both rotatably connected to the mounting arm 333 .

[0111] like Fig.12 and Fig.13 As shown, the support assembly 31 includes a first partition 311, a second partition 312 and a second gear 313, and the first partition 311 and the second partition 312 are both circular partitions. The first partition 311 is sealed and connected to the inner wall of the tank body 1, so as to divide the internal space of the tank body 1 into a plurality of separate spaces, and a plurality of first through holes are evenly provided on the first partition 311. The kitchen waste sludge enters the tank body 1 from the top of the tank body 1, and is transported downward through the first through holes on the plurality of first partitions 311 in turn, until a set weight of kitchen waste sludge is stacked on each layer of the first partition 311, and there is no need to load each layer of the first partition 311 separately, which reduces the difficulty of operation. And when unloading, the material on the first partition 311 is transported downward from the first through hole and the second through hole until it reaches the bottom of the tank body 1 for unloading. The second partition 312 is rotatably connected to the first partition 311, and the second partition 312 abuts against the lower surface of the first partition 311. The second partition 312 is evenly provided with a plurality of second through holes, and the positions of the plurality of first through holes and the plurality of second through holes can correspond one to one. The first through hole and the second through hole are both evenly distributed fan-shaped holes. When the second partition 312 rotates to a specific position, the first through hole and the second through hole are connected one to one. At this time, the support assembly 31 is in an open state, and the kitchen waste slag placed from the top of the tank body 1 can be transported downward through the first through hole and the second through hole, and the raw materials can be placed in the support assembly 31 one layer at a time, and each layer can also be unloaded, and the scraper 324 rotates to scrape the scattered materials into the through hole for unloading. When the second partition 312 rotates to stagger the first through hole and the second through hole, the support assembly 31 is in a closed state to prevent the kitchen waste slag on the first partition 311 from continuing to fall downward. At this time, the first partition 311 is used for aerobic composting fermentation. The second gear 313 is sleeved on the linkage shaft 2, and the second partition plate 312 is provided with a second tooth groove 314 matching the second gear 313. After the driving mechanism drives the linkage shaft 2 to move upward by the third set distance from the first state or the fourth set distance from the second state, the linkage shaft 2 is in the third state, at which time the second gear 313 is sleeved in the second tooth groove 314, and the gear is meshed with the inner wall of the tooth groove. The third set distance is the distance between the second gear 313 and the second tooth groove 314 in the first state, and the fourth set distance is the distance between the second gear 313 and the second tooth groove 314 in the second state. After the second gear 313 is meshed with the second tooth groove 314, when the driving mechanism drives the linkage shaft 2 to rotate, the second partition plate 312 can be driven to rotate.

[0112] Preferably, the driving assembly includes a motor and an electric lifting platform. The electric lifting platform is a conventional device, such as a scissor-type lifting platform, a chain lift, a loading and unloading platform, etc., which will not be described in detail here. The electric lifting platform is horizontally arranged on the tank body 1, the motor is arranged on the electric lifting platform, and the linkage shaft 2 is rotatably connected with the electric lifting platform. When the electric lifting platform moves up and down, it drives the motor and the linkage shaft 2 to move up and down together, so that the linkage shaft 2 can switch between the first state, the second state and the third state, and the motor and the linkage shaft 2 always keep the rotating shaft of the motor connected to the linkage shaft 2 during the up and down movement to drive the linkage shaft 2 to rotate.

[0113] like Fig.11 and Fig.12 As shown, an end plate 11 is provided at the upper end of the tank body 1, and a feed port 12 and an axis mounting hole are provided on the end plate 11. The linkage shaft 2 is sleeved in the axis mounting hole, and the linkage shaft 2 can rotate and move up and down in the axis mounting hole. The lower end opening of the tank body 1 is connected to a conical funnel 13, and a discharge port is provided on the conical funnel 13 to facilitate unloading. A vent 14 is provided at a position corresponding to each composting mechanism 3 on the tank body 1, and the vent 14 is connected to a fan to transport air into the tank body 1 to increase the oxygen concentration in each composting mechanism 3 in the tank body 1. A waste gas collection port 15 is provided at a position corresponding to each composting mechanism 3 on the tank body 1, and the waste gas collection port 15 is connected to an odor treatment device, which is a conventional device to prevent odor from spreading into the air and polluting the environment. A temperature sensor is also provided in the tank body 1 to monitor the temperature in the tank body 1.

[0114] The anaerobic fermentation device 105 includes a removal unit, a slurry temporary storage tank, a hydrolysis unit, an anaerobic fermentation unit, a sludge liquid temporary storage tank and a centrifugal dewatering machine connected in sequence. The removal unit is connected to the slurry outlet, and the centrifugal dewatering machine is provided with a sludge outlet. The anaerobic fermentation unit is provided with a biogas outlet and a sludge liquid outlet, the biogas outlet is connected to a biogas storage device, and the sludge liquid outlet is connected to a sludge liquid temporary storage tank. The centrifugal dewatering machine is connected to a flocculant storage tank, and the flocculant storage tank is used to add flocculants to the centrifugal dewatering machine. Specifically, the removal unit mainly functions to remove light impurities such as fibers, residual plastics, pepper skins, pepper seeds, etc. in the organic slurry that interfere with the anaerobic system, and prevent them from causing damage to pumps, centrifuges, pipelines and anaerobic equipment. The impurity removal unit can centrifuge the incoming slurry to effectively remove solids and avoid the generation of scum after a large amount of light impurities enter the anaerobic system. The accumulation of scum will cause crusting on the liquid surface in the anaerobic tank, which will not only affect the overflow of biogas, but also cause the anaerobic system to collapse if the crust is severe. The solid slag separated by the impurity removal unit is transported out of the system by the impurity screw, and the separated liquid phase flows into the slurry temporary storage box by gravity. The main function of the hydrolysis unit is to homogenize the organic matter before entering the anaerobic fermentation system, buffer the incoming materials, and adjust the feed load of the anaerobic fermentation tank. At the same time, the organic slurry entering the hydrolysis tank of the hydrolysis unit is quickly hydrolyzed into organic acid, accumulating a large amount of fermentable substances for the methane production stage. Separating the acid production process separately can avoid the acid production process of organic matter in single-phase fermentation being too fast, causing acidification in the fermentation tank. The material in contact with the material in the hydrolysis tank is 316 stainless steel, which meets the corrosion of the tank material caused by the high concentration of organic acid in the slurry, ensuring that the service life of the tank material exceeds 25 years. The tank is equipped with a central agitator, and the agitation force can fully mix the floating materials and suspended materials to avoid the formation of scum. The organic slurry will produce hydrolysis gas in the hydrolysis tank, the main components of which are carbon dioxide and hydrogen sulfide. In order to ensure that the system has no secondary gas pollution and safety hazards, a deodorization interface is set on the top of the hydrolysis tank, which can be connected to the deodorization system. The main function of the anaerobic fermentation unit is to degrade the slurry treated at the front end under the action of methanogens in the tank under appropriate temperature, pH value and other conditions, and finally convert it into biogas. A mechanical central agitator is installed on the top of the fermentation tank. The agitator has multiple sets of stirring blades. The upper blades can break the scum. At the same time, a scum collection point is set on the upper part of the anaerobic tank. Under the action of the agitator flow field, the suspended matter on the liquid surface moves to the tank wall, enters the scum collection device, and is smoothly discharged from the tank. In addition, high and low pressure protection devices are installed on the top of the tank to ensure the structural safety of the fermentation tank. Online monitoring equipment such as thermometers and liquid level gauges are installed in the tank, and their data can be displayed in real time in the automatic control system. The fermentation tank feed pipe is equipped with a sampling port for regular sampling and testing of material solid content, pH value, NH4-N and other characteristic parameters. An observation hole is set on the top of the fermentation tank, and a rotating ladder and a buffer platform are installed outside the tank to facilitate operators to reach the observation hole and the tank top. The biogas residue liquid temporary storage tank stores the biogas residue liquid after anaerobic digestion.It can balance the fluctuations of the discharge volume of the front-end anaerobic fermentation tank and the processing volume of the back-end equipment. The tank body is equipped with a central stirring device, and the stirring force can fully mix the materials deposited at the bottom, the materials floating on the top and the suspended materials, and an insulation layer is set outside the tank. A liquid level gauge is installed in the discharge tank to monitor the parameters in the tank in real time to ensure safe operation. The discharge tank is equipped with high-pressure and low-pressure protection devices. When the pressure exceeds or falls below the set value, the protective seal responds automatically, which can effectively prevent the danger caused by excessive or low pressure and protect the safety of the tank body. The centrifugal dehydrator is placed in the dehydration workshop. In order to improve the dehydration performance of the sludge liquid, flocculants need to be added to the fermentation product for adjustment before dehydration. The sludge produced after dehydration is spirally transported to the aerobic composting device for further utilization. The anaerobic fermentation device 105 adopts a wet, medium-temperature, anaerobic fermentation process. The kitchen waste slurry after extrusion treatment enters this system and undergoes anaerobic digestion to eventually produce biogas. The extruded slurry first enters the impurity removal unit, where it flows into the slurry temporary storage box after light impurities are removed. The temporarily stored slurry is then adjusted by the temperature control unit and then enters the anaerobic fermentation unit to ensure that the temperature of the kitchen waste slurry meets the requirements of medium-temperature anaerobic fermentation. The fermented digestate enters the sewage treatment system after the sludge liquid is separated, and the sludge is transported by a spiral to the aerobic composting device for further fermentation and utilization. The biogas enters the biogas double-membrane gas cabinet from the top of the tank and is transported to the back-end utilization unit through the fan after pressure stabilization.

[0115] The kitchen waste resource utilization system of the present invention performs anaerobic fermentation to produce biogas after crushing and sorting the kitchen waste, and then performs aerobic composting on the biogas residue produced after the anaerobic fermentation, so as to make full use of the useful components in the kitchen waste, realize the resource utilization of the kitchen waste, realize the harmless treatment of the kitchen waste, and effectively improve the utilization rate of the kitchen waste. The whole set of equipment runs automatically, automatically sorts and processes the collected kitchen waste, and reduces the operating intensity of the operators to the maximum extent, saving the investment of labor costs.

[0116] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0117] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0118] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0119] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0120] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A kitchen waste resource utilization system, characterized in that: The kitchen waste resource utilization system comprises: a material receiving device, a first crushing device (101), a sorting device (102), a second crushing device, a solid-liquid separation device (103), a sand removal device (104), an anaerobic fermentation device (105) and an aerobic composting device; the material receiving device is connected to the first crushing device (101) via a first screw feeder, and the first crushing device (101) is connected to the sorting device (102) via a second screw feeder (112); the sorting device (102) is provided with an outlet for undersize material and a an oversize outlet, the undersize outlet is connected to the second crushing device via a plurality of third screw feeders (113), the outlet of the second crushing device is connected to the solid-liquid separation device (103), the oversize outlet is connected to the slag discharge room via a fourth screw feeder; the solid-liquid separation device (103) is provided with a slurry outlet, the slurry outlet is connected to the anaerobic fermentation device (105) via the sand removal device (104); the anaerobic fermentation device (105) is provided with a biogas residue outlet, the biogas residue outlet is connected to the aerobic composting device; The first crushing device (101) comprises a crushing box (4), a crushing cylinder (5), a blade (6), a main shaft (7) and a plurality of scissor-fork mechanisms (8); The crushing box (4) is provided with an inlet and an outlet, the inlet of the crushing box (4) is connected to the first screw feeder, and the outlet of the crushing box (4) is connected to the second screw feeder (112); The main shaft (7) is rotatably arranged in the crushing box (4), and a sliding block (71) capable of sliding along the axial direction of the main shaft (7) is arranged on the main shaft (7); The crushing cylinder (5) comprises a plurality of arc-shaped crushing plates (51) arranged in sequence along the circumferential direction, the inner surface of each arc-shaped crushing plate (51) being connected to the main shaft (7) via a scissor mechanism (8), and the blade (6) is arranged on the outer surface of the arc-shaped crushing plate (51); The scissor mechanism (8) comprises a first cross rod (81) and a second cross rod (82) which are cross-arranged and hinged to each other, the first end of each of the first cross rods (81) being slidably connected to the inner surface of the arc-shaped crushing plate (51), the first end of the second cross rod (82) being hinged to the inner surface of the arc-shaped crushing plate (51), the second end of the first cross rod (81) being hinged to the main shaft (7), and the second end of the second cross rod being hinged to the slider (71); The aerobic composting device comprises a tank body, a driving mechanism and a plurality of composting mechanisms; The tank body (1) is a hollow cylinder. The tank body (1) is arranged vertically. An end plate (11) is arranged at the upper end of the tank body (1). A feed port (12) and a shaft mounting hole are provided on the end plate (11). The biogas residue outlet is connected to the feed port (12). The lower end opening of the tank body (1) is connected to a conical funnel (13). A discharge port is provided on the conical funnel (13). The driving mechanism comprises a driving component and a linkage shaft (2); the driving component is arranged on the tank body (1); the linkage shaft (2) is vertically arranged in the tank body (1); the linkage shaft (2) is sleeved in the shaft mounting hole; the driving component is connected to the linkage shaft (2); the driving component can drive the linkage shaft (2) to rotate and move up and down; A plurality of composting mechanisms (3) are arranged in the tank body (1) at intervals along the vertical direction, and the composting mechanism (3) comprises a support assembly (31) and a compost turning assembly (32); the support assembly (31) is connected to the inner wall of the tank body (1), and the support assembly (31) is used to stack kitchen waste sludge; the compost turning assembly (32) is rotatably arranged on the support assembly (31), and the linkage shaft (2) can be connected to the compost turning assembly (32) to drive the compost turning assembly (32) to rotate; The anaerobic fermentation device (105) comprises a removal unit, a slurry temporary storage tank, a hydrolysis unit, an anaerobic fermentation unit, a biogas residue temporary storage tank and a centrifugal dehydrator which are connected in sequence; The impurity removal unit is connected to the slurry outlet, and the centrifugal dehydrator is provided with the biogas residue outlet; The anaerobic fermentation unit is provided with a biogas outlet and a biogas residue liquid outlet, the biogas outlet is connected to a biogas storage device, and the biogas residue liquid outlet is connected to the biogas residue liquid temporary storage tank; The centrifugal dehydrator is connected to a flocculant storage box, and the flocculant storage box is used to add flocculant to the centrifugal dehydrator; The method for resource utilization of kitchen waste is implemented based on a kitchen waste resource utilization system; the method for resource utilization of kitchen waste includes: S1. Collect the kitchen waste and drain it; S2, the first crushing device (101) breaks the bag and crushes the drained kitchen waste; S3, the sorting device (102) sorts the crushed kitchen waste into a first material having a particle size less than or equal to a first set value and a second material having a particle size greater than the first set value; S4, the first material is finely crushed by the second crushing device and then subjected to solid-liquid separation by the solid-liquid separation device (103) to separate slurry and solid slag, and the solid slag and the second material are transported to a slag discharge room for packaging; S5. After the slurry is desanded by the desanding device (104), it is transported to the anaerobic fermentation device (105) for anaerobic fermentation. After the fermented biogas residue is dehydrated, it is transported to the aerobic composting device for aerobic composting.

2. The kitchen waste resource utilization system according to claim 1, characterized in that: The step S3 comprises: S31, screening the crushed kitchen waste for the first time, screening out a third material and a fourth material whose particle size is less than or equal to a second set value; S32, the fourth material is transferred to the slag discharge room, the third material is subjected to a second screening after being vibrated and magnetically separated to remove metal impurities, and a first material having a particle size less than or equal to a first set value and a second material having a particle size greater than the first set value are screened out.

3. The kitchen waste resource utilization system according to claim 2, characterized in that: The first setting value is 80 mm to 120 mm, and the second setting value is 150 mm to 250 mm.

4. The kitchen waste resource utilization system according to claim 1, characterized in that: The first crushing device (101) further comprises a saw blade (9), a saw seat (94) and a sliding shaft; The saw seat (94) is arranged on the main shaft (7), the saw blade (9) is located in the crushing cylinder (5), and the blade of the saw blade (9) faces the intersection of two adjacent arc-shaped crushing plates (51); a first sliding rod (91) and a second sliding rod (92) are arranged on the saw blade (9); A guide groove is provided in the sliding block (71) along the radial direction of the crushing cylinder (5), and one end of the first sliding rod (91) is slidably disposed in the guide groove; The saw seat (94) comprises two saw plates (95) parallel to each other, each of the saw plates (95) being provided with a sliding bevel groove (96), the distance between the first end of the sliding bevel groove (96) and the slider (71) being smaller than the distance between the second end of the sliding bevel groove (96) and the slider (71), the first end and the second end of the sliding bevel groove (96) being opposite ends, the first end of the sliding bevel groove (96) being an end close to the main shaft (7), and the second end of the sliding bevel groove (96) being an end close to the saw blade (9); The second sliding rod (92) is provided with a sliding hole corresponding to the sliding inclined groove (96); the second sliding rod (92) is located between the two saw plates (95); and the sliding shaft sleeve is arranged in the sliding inclined groove (96) and the sliding hole.

5. The kitchen waste resource utilization system according to claim 1, characterized in that: The main shaft (7) is rotatably sleeved with a driving disk (72), the driving disk (72) being provided with a threaded connection portion protruding along the axial direction of the main shaft (7), the threaded connection portion being provided with an external thread; The slider (71) is provided with an internal threaded hole that matches the threaded connection, and the threaded connection portion is threadedly connected to the slider (71).

6. The kitchen waste resource utilization system according to claim 1, characterized in that: An adjustment mechanism (41) and an adjustment plate (42) are provided in the crushing box (4); the adjustment plate (42) is rotatably arranged in the crushing box (4); the adjustment plate (42) is located below the entrance of the crushing box (4); and the adjustment mechanism (41) is capable of adjusting the distance between the adjustment plate (42) and the blade (6).

7. The kitchen waste resource utilization system according to claim 1, characterized in that: The compost turning assembly (32) comprises a sleeve (321), a first gear (322), and a plurality of stirring units; The sleeve (321) is rotatably connected to the support assembly (31); The first gear (322) is sleeved on the linkage shaft (2); the sleeve (321) is arranged vertically; a first tooth groove (323) matching the first gear (322) is provided in the sleeve (321); and the first gear (322) is sleeved in the first tooth groove (323); The stirring unit comprises a scraper (324), a toothed stirring blade (325), a first connecting member and a second connecting member; The scraper (324) and the toothed stirring blade (325) are both rotatably connected to the first connecting member, and the linkage shaft (2) can be drivingly connected to the first connecting member; The scraper (324) and the toothed stirring blade (325) are both rotatably connected to the second connecting member, and the second connecting member is rotatably connected to the sleeve (321).

8. The kitchen waste resource utilization system according to claim 7, characterized in that: The first connecting member comprises a first connecting arm (326), a driving shaft (327), a first bevel gear (328) and a second bevel gear (329); the second connecting member comprises a second connecting arm (331) and a driven shaft (332); The sleeve (321) is provided with a first mounting hole and a second mounting hole, the central axes of the first mounting hole and the second mounting hole both pass through the central axis of the linkage shaft (2), and the first mounting hole is located below the second mounting hole; The driving shaft (327) is rotatably sleeved in the first mounting hole, and the driven shaft (332) is rotatably disposed in the second mounting hole; The first bevel gear (328) is sleeved on the linkage shaft (2), and the second bevel gear (329) is sleeved on the first end of the drive shaft (327), and after the linkage shaft (2) moves downward a second set distance, the first bevel gear (328) can mesh with the second bevel gear (329); The first connecting arm (326) is connected to the second end of the driving shaft (327), and the second connecting arm (331) is connected to the driven shaft (332); The first ends of the first connecting arm (326) and the second connecting arm (331) are both rotatably connected to the scraper (324), and the second ends of the first connecting arm (326) and the second connecting arm (331) are both rotatably connected to the toothed stirring blade (325).

9. The kitchen waste resource utilization system according to claim 1, characterized in that: The support assembly (31) comprises a first partition plate (311), a second partition plate (312) and a second gear (313); The first partition plate (311) is connected to the inner wall of the tank body (1), and a plurality of first through holes are evenly formed on the first partition plate (311); The second partition plate (312) is rotatably connected to the first partition plate (311), the second partition plate (312) abuts against the lower surface of the first partition plate (311), a plurality of second through holes are evenly formed on the second partition plate (312), and the positions of the plurality of first through holes and the plurality of second through holes can correspond one to one; The second gear (313) is sleeved on the linkage shaft (2); the second partition plate (312) is provided with a second tooth groove (314) matching the second gear (313); after the linkage shaft (2) moves upward a set distance, the second gear (313) can be sleeved in the second tooth groove (314).

Images