A type of in-situ pyrolysis vehicle for kitchen waste

Abstract

This invention provides a vehicle for in-situ pyrolysis of kitchen waste, comprising a vehicle body and a waste treatment system. The waste treatment system includes a crusher, a sealed conveying device, a pyrolysis furnace, and an incinerator. The sealed conveying device includes a feed pipe with a feed inlet connected to the crusher in the middle. One end of the feed pipe is connected to the pyrolysis furnace, and an openable valve is located on the side of the feed inlet near the pyrolysis furnace. The other end of the feed pipe has a hydraulic push rod that can move toward and away from the valve. The pyrolysis furnace includes an inner furnace body and a heating jacket surrounding the inner furnace body. The incinerator is connected to the pyrolysis furnace to receive pyrolysis gas. The incinerator has a heat storage body for air inflow, a gas nozzle, and a flue gas pipe, wherein one end of the flue gas pipe is connected to the incinerator and the other end is connected to the heating jacket. The beneficial effects of this invention are: kitchen waste is treated in-situ in a sealed pyrolysis vehicle, avoiding the emission of polluting gases; pyrolysis gas is used for combustion heating, achieving resource utilization and recycling, and saving energy and reducing emissions.

Description

Technical Field

[0001] This invention relates to the field of waste treatment technology, and in particular to an in-situ pyrolysis vehicle for kitchen waste. Background Technology

[0002] Compared to other types of waste, kitchen waste is characterized by its high content of moisture, organic matter, grease, and salt, making it easily perishable and rich in nutrients. Currently, nationwide, the primary method for handling kitchen waste is to build kitchen waste treatment plants and collect and transport the waste to these plants for processing. However, for areas with low demand for kitchen waste treatment, centralized resources and large-scale production are not feasible. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of existing food waste treatment technologies, embodiments of the present invention provide a food waste in-situ pyrolysis vehicle.

[0004] An embodiment of the present invention provides a vehicle for in-situ pyrolysis of kitchen waste, including a vehicle body and a waste treatment system mounted on the vehicle body. The waste treatment system includes a crusher, a sealed conveying device, a pyrolysis furnace, and an incinerator.

[0005] The crusher is used to receive external kitchen waste and crush it.

[0006] The sealing conveying device includes a feed pipe with a feed inlet in the middle connected to the crusher. One end of the feed pipe is connected to the pyrolysis furnace, and an openable valve is provided on the side of the feed inlet closer to the pyrolysis furnace. The other end of the feed pipe is provided with a hydraulic push rod that can move toward and away from the valve. When the output end of the hydraulic push rod is on the side of the feed inlet away from the valve, the valve is closed, and when the output end of the hydraulic push rod is on the side of the feed inlet closer to the valve, the valve is open.

[0007] The pyrolysis furnace includes an inner furnace body and a heating jacket surrounding the inner furnace body. High-temperature gas flows through the heating jacket to heat the inner furnace body, so that the kitchen waste in the pyrolysis furnace is pyrolyzed to form pyrolysis gas and coke.

[0008] The incinerator is connected to the pyrolysis furnace to receive pyrolysis gas. The incinerator is equipped with a heat storage body for air inflow, a gas nozzle, and a flue gas pipe. One end of the flue gas pipe is connected to the incinerator, and the other end is connected to the heating jacket. The heat storage body is disposed on the flue gas pipe. The high-temperature flue gas formed by the combustion of pyrolysis gas in the incinerator flows along the flue gas pipe, through the heat storage body, and to the heating jacket. The high-temperature flue gas exchanges heat with air in the heat storage body and cools down to the temperature required for the pyrolysis of kitchen waste.

[0009] Furthermore, the outlet of the pyrolysis furnace is equipped with a discharge auger for transporting coke and a sealed box connected to the discharge auger. The sealed box is equipped with a nozzle, which is used to spray the coke with the waste liquid from the pretreatment of kitchen waste, thereby purifying the waste liquid and cooling the coke.

[0010] Furthermore, the incinerator has a conical structure at both ends, with one end being a pyrolysis gas inlet connected to the inner furnace body; the other end is provided with the heat storage body and the gas nozzle, with the hot air nozzle of the heat storage body and the gas nozzle being arranged opposite to the pyrolysis gas inlet.

[0011] Furthermore, it also includes a water vapor absorption tower disposed between the pyrolysis furnace and the incinerator, the water vapor absorption tower being used to absorb water vapor in the pyrolysis gas.

[0012] Furthermore, it also includes a tubular conveyor belt, one end of which is connected to the crusher and the other end of which is connected to the feed inlet of the feed pipe.

[0013] Furthermore, the output end of the hydraulic push rod is connected to a piston, and the diameter of the piston is equal to the inner diameter of the feed pipe.

[0014] Furthermore, the feed pipe is provided with a solid-liquid separation section at one end near the pyrolysis furnace. The solid-liquid separation section includes a tubular solid-liquid separation ceramic membrane, a wastewater tank surrounding the tubular solid-liquid separation ceramic membrane, a preheating sleeve surrounding the wastewater tank, and a shaftless spiral body disposed inside the tubular solid-liquid separation ceramic membrane.

[0015] Furthermore, the diameter of the tubular solid-liquid separation ceramic membrane decreases along the direction away from the valve.

[0016] Furthermore, the sealing and conveying device also includes an oil-water separator, which is connected to the wastewater tank via an oil drain pipe.

[0017] Furthermore, the oil-water separator is provided with an oil-water separation ceramic membrane in the middle, the top of the oil-water separator is connected to an oil storage tank, the bottom is connected to the oil drain pipe, and the side wall of the oil-water separator is connected to a waste liquid tank.

[0018] The beneficial effects of the technical solutions provided by the embodiments of the present invention are as follows:

[0019] 1. The existing large-scale food waste disposal unit is miniaturized and has the advantage of being mobile, which can process food waste in situ, reduce air and environmental pollution caused by food waste storage, and reduce transportation pressure.

[0020] 2. In view of the current main methods for treating kitchen waste in my country, namely incineration, composting and anaerobic fermentation, low-temperature pyrolysis is adopted to treat kitchen waste. This method not only has the advantages of short processing time and high efficiency, but also disinfection and sterilization, avoidance of pollution, and can greatly reduce the volume of waste and achieve a high degree of resource utilization.

[0021] 3. At the same time, the high-temperature flue gas after combustion is circulated into the heating jacket to heat the pyrolysis furnace, realizing the recycling of heat, saving energy and reducing emissions, and carrying out preliminary resource utilization and heat recovery of kitchen waste.

[0022] 4. A sealed conveying device is used to achieve continuous feeding during the pyrolysis of kitchen waste. The opening and closing state of the valve is controlled by the position of the hydraulic push rod output end, ensuring that the solid-liquid separation section is always in a sealed state, effectively preventing gas from escaping from the discharge port and reducing the emission of polluting gases. It is suitable for kitchen waste treatment in places with high traffic and large amounts of kitchen waste, such as large music festivals, night markets, and food streets. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a kitchen waste in-situ pyrolysis vehicle according to the present invention;

[0024] Figure 2 This is a top view of a kitchen waste in-situ pyrolysis vehicle according to the present invention;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of the waste treatment system 1 in China;

[0026] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle sealing conveyor device 20;

[0027] Figure 5 yes Figure 4 A schematic diagram of the structure of the shaftless helical body 2151;

[0028] Figure 6 yes Figure 3 Schematic diagram of the structure of the intermediate pyrolysis furnace 30;

[0029] Figure 7 yes Figure 3 Schematic diagram of the structure of the incinerator 40;

[0030] Figure 8 yes Figure 3 Working principle diagram of intermediate pyrolysis furnace 30 and incinerator 40.

[0031] In the diagram: 1-Waste treatment system, 10-Crusher, 101-Feed hopper, 20-Sealed conveyor, 210-Feed pipe, 211-Hydraulic push rod, 212-Valve, 213-Piston, 214-Feed inlet, 215-Solid-liquid separation section, 2151-Shaftless spiral, 2152-Tubular solid-liquid separation ceramic membrane, 2153-Sewage tank, 2154-Preheating jacket, 2155-Insulation layer, 220-Oil-water separator, 221-Oil drain pipe, 222-Oil-water separation ceramic membrane, 223-Oil storage tank, 22 4-Waste liquid tank, 225-Pressure relief valve, 226-Conical joint, 30-Pyrolysis furnace, 301-Inner furnace body, 302-Heating jacket, 303-Flue gas inlet, 304-Flue gas outlet, 305-Feed inlet, 306-Discharge outlet, 307-High pressure extrusion chamber, 308-Discharge auger, 309-Sealed box, 40-Incinerator, 401-Heat regenerator, 402-Gas nozzle, 403-Flue gas pipeline, 404-Air inlet, 405-Hot air nozzle, 406-Pyrolysis gas inlet, 2-Car body, 2a-Car compartment. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The following description presents a preferred embodiment of the various possible embodiments of the present invention, intended to provide a basic understanding of the invention, but not intended to identify key or decisive elements of the invention or to limit the scope of protection sought.

[0033] An embodiment of the present invention provides a pyrolysis vehicle for in-situ processing of kitchen waste (hereinafter referred to as the pyrolysis vehicle). In this embodiment, the pyrolysis vehicle is suitable for the processing of kitchen waste. It is understood that the pyrolysis vehicle is also suitable for other pyrolyzable wet wastes such as household waste and agricultural waste, and its scope of application is not limited by the specific embodiment of the present invention.

[0034] In this document, the directional terms such as front, rear, upper, and lower are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and may vary depending on the different ways the pyrolysis vehicle is used and placed. The use of these directional terms should not limit the scope of protection claimed in this application.

[0035] Please refer to Figure 1 and 2 An embodiment of the present invention provides a vehicle for in-situ pyrolysis of kitchen waste, including a vehicle body 2 and a waste treatment system 1 mounted on the vehicle body 2. The waste treatment system 1 is specifically located in the compartment 2a at the rear of the vehicle body 2.

[0036] like Figure 2 and 3As shown, the waste treatment system 1 includes a crusher 10, a sealed conveying device 20, a pyrolysis furnace 30, and an incinerator 40.

[0037] like Figure 1 As shown, the crusher 10 is located on one side of the carriage 2a. A feed hopper 101 is provided on the upper side of the crusher 10, extending through the carriage 2a so that kitchen waste can be directly fed into the crusher 10 from outside the carriage 2a. The crusher 10 receives external kitchen waste and crushes it, thus performing preliminary treatment of the kitchen waste in preparation for subsequent pyrolysis.

[0038] like Figure 3 and 4 As shown, the kitchen waste pulverized by the crusher 10 is conveyed to the pyrolysis furnace 30 via the tubular conveyor belt 60 and the sealed conveying device 20. The sealed conveying device 20 mainly includes a feed pipe 210 and an oil-water separator 220.

[0039] Specifically, the feed pipe 210 is used to receive kitchen waste conveyed by the tubular conveyor belt 60 and to compress and transport the kitchen waste to the pyrolysis furnace 30. The feed pipe 210 is a circular tube with a feed inlet 214 connected to the crusher in its middle. One end of the feed pipe 210 is connected to the pyrolysis furnace 30, and the feed pipe 210 has an openable valve 212 on the side of the feed inlet 214 near the pyrolysis furnace 30. The other end of the feed pipe 210 has a hydraulic push rod 211 that can move toward and away from the valve 212. When the valve 212 is open, the feed pipe 210 communicates with the pyrolysis furnace 30; conversely, when the valve 212 is closed, the feed pipe 210 is blocked from the pyrolysis furnace 30. In this embodiment, the output end of the hydraulic push rod 211 is connected to the piston 213. The diameter of the piston 213 is approximately equal to the inner diameter of the feed pipe 210. Driven by the hydraulic push rod 211, the piston 213 moves back and forth along the axial direction of the feed pipe 210.

[0040] One end of the tubular conveyor belt 60 is connected to the discharge port of the crusher 10, and the other end is connected to the feed port 214, allowing the crushed kitchen waste to enter the feed pipe 210. The feed port 214 is located on the movement trajectory of the piston 213. During the feeding process of the pyrolysis furnace 30, the opening and closing state of the valve 212 of the sealed conveying device 20 is controlled by the position of the output end of the hydraulic push rod 211, i.e., the position of the piston 213. Specifically, when the piston 213 is located on the side of the feed port 214 away from the valve 212, the valve 212 is closed. At this time, the valve 212 is closed, the kitchen waste enters the feed pipe 210, and the hydraulic push rod 211 pushes the piston 213 to compress the kitchen waste. When the piston 213 is located on the side of the feed inlet 214 close to the valve 212, the valve 212 opens. When the kitchen waste is squeezed into the space between the discharge outlet 214 and the valve 212, the compression process of the kitchen waste is completed. After that, the valve 212 opens, and the piston 213 pushes the kitchen waste into the pyrolysis furnace 30.

[0041] Continue as Figure 4 As shown, the feed pipe 210 is also provided with a solid-liquid separation section 215 near the pyrolysis furnace 30. The solid-liquid separation section 215 includes a tubular solid-liquid separation ceramic membrane 2152, a wastewater tank 2153 surrounding the tubular solid-liquid separation ceramic membrane 2152, a preheating sleeve 2154 surrounding the wastewater tank 2153, and a shaftless spiral 2151 disposed inside the tubular solid-liquid separation ceramic membrane 2152. The oil-water mixture filtered by the tubular solid-liquid separation ceramic membrane 2152 is collected in the wastewater tank 2153.

[0042] like Figure 4 and 5 As shown, the inner diameter of the shaftless spiral 2151 is basically the same as the inner diameter of the solid-liquid separation ceramic membrane 2152. The shaftless spiral 2151 does not need to rotate; the kitchen waste moves along the shaftless spiral 2151, thereby compressing the kitchen waste and squeezing out the liquid, achieving thorough solid-liquid separation. Preferably, the diameter of the tubular solid-liquid separation ceramic membrane 2152 decreases along the direction away from the valve 212, thus enhancing the squeezing effect at the end of the tubular solid-liquid separation ceramic membrane 2152 and improving the solid-liquid separation effect.

[0043] Continue as Figure 4 As shown, the preheating jacket 2154 has a hollow structure, through which high-temperature gas is passed to preheat the kitchen waste inside the tubular solid-liquid separation ceramic membrane 2152, so that the oil is heated and melted to achieve separation. An insulation layer 2155 is also fitted around the preheating jacket 2154. The insulation layer 2155 is made of insulation material and serves to insulate and reduce heat loss.

[0044] Continue as Figure 4 As shown, the oil-water separator 220 is connected to the solid-liquid separation section 215 via an oil drain pipe 221, and its function is to separate the liquid separated from the solid in the solid-liquid separation section 215 into oil and water. Specifically, the oil-water separator 220 has an oil-water separation ceramic membrane 222 in the middle, an oil storage tank 223 is connected to the top of the oil-water separator 220, the oil drain pipe 221 is connected to the bottom, and a waste liquid tank 224 is connected to the side wall of the oil-water separator 220.

[0045] The oil-water mixture transported by the drain pipe 221 enters from the bottom of the oil-water separator 220, with oil distributed on the upper layer of the liquid. The liquid flows upward through the oil-water separation ceramic membrane 222. The oil-water separation ceramic membrane 222 allows water to pass through while blocking oil, thus ensuring thorough separation of oil and water, resulting in good treatment performance and resistance to clogging. Water flows into the waste liquid tank 224 from both sides of the oil-water separator 220, while oil flows into the oil storage tank 223 from the top of the oil-water separator 220. The high-temperature, high-pressure oil-water mixture is more easily separated in the oil-water separation ceramic membrane 222.

[0046] In this embodiment, the oil-water separator 220 is provided with conical connectors 226 at both the top and bottom. The two conical connectors 226 are respectively connected to the oil storage tank 223 and the oil drain pipe 221. The oil-water separation ceramic membrane 222 is disposed between the two conical connectors 226. The oil-water mixture entering through the oil drain pipe 221 is completely filtered into the oil-water separation ceramic membrane 222, resulting in excellent oil-water separation.

[0047] In addition, a pressure relief valve 225 is provided on the oil drain pipe 221. The pressure in the sewage tank 2153 and the oil-water separator 220 is adjusted by the pressure relief valve 225 so that the sealing conveying device 20 can operate stably and continuously.

[0048] As shown in the figure, when the sealed conveying device 20 is working, the valve 212 is first closed to keep the solid-liquid separation section 215 closed. The preheating jacket 2154 heats the solid-liquid separation section 215 to about 200°C to complete preheating. Kitchen waste is then fed into the feed pipe 210 through the feed inlet 214 via the tubular conveyor belt 60. Next, the hydraulic push rod 211 drives the piston 213 towards the valve 212, squeezing the kitchen waste. Once the piston 213 reaches the feed inlet 214, the valve 212 is opened, and the piston 213 keeps the solid-liquid separation section 215 sealed. Simultaneously, during the piston 213's return stroke, the valve 212 must close before the piston 213 contacts the feed inlet 214 to maintain the solid-liquid separation section 215 sealed. In this way, no polluting gases escape during the continuous feeding and pyrolysis process of the sealed conveying device 20. Finally, the kitchen waste, after being separated into solid and liquid by the solid-liquid separation section 215, is pushed in by the piston 213 and sent to the pyrolysis furnace 30.

[0049] like Figure 3 and 6 As shown, the pyrolysis furnace 30 includes an inner furnace body 301 and a heating jacket 302 surrounding the inner furnace body 301. The interior of the inner furnace body 301 serves as the pyrolysis space for kitchen waste. A high-pressure compression chamber 307 is located above the feed inlet 305 of the inner furnace body 301. The high-pressure compression chamber 307 is connected to the solid-liquid separation section 215 to receive the kitchen waste after solid-liquid separation. The bottom of the high-pressure compression chamber 307 is connected to the feed inlet 305, and the high-pressure compression chamber is used to compress the received kitchen waste.

[0050] The heating jacket 302 is a cylindrical hollow structure made of thermally conductive material, with its inner wall in contact with the outer wall of the inner furnace body 301 for heat transfer. The heating jacket 302 has a flue gas inlet 303 at the bottom and a flue gas outlet 304 at the top. High-temperature gas can be introduced into the heating jacket 302 through the flue gas inlet 303. As the high-temperature gas flows through the interior of the heating jacket 302, it heats the inner furnace body 301. Once the heating temperature reaches the pyrolysis temperature, the kitchen waste is pyrolyzed to form pyrolysis gas and coke. Here, the pyrolysis gas mainly consists of small-molecule combustible gas and gasified pyrolysis oil.

[0051] The pyrolysis furnace 30 is equipped with a discharge auger 308 for transporting coke and a sealed box 309 connected to the discharge auger 308 at its discharge port 306. Specifically, the inlet end of the discharge auger 308 is located below the discharge port 306 of the inner furnace body 301, and the outlet end of the discharge auger 308 extends into the sealed box 309. The sealed box 309 is made of high-temperature resistant sealing material. The discharge auger 308 transports the coke produced by pyrolysis into the sealed box 309, which stores the coke, cools it, and prevents it from spontaneously combusting upon contact with air. Simultaneously, nozzles can be installed inside the sealed box 309 to spray the coke with wastewater generated during the pretreatment of kitchen waste, performing primary wastewater purification and simultaneously cooling the coke. The coke is then transported out and further processed to be converted into biochar for utilization.

[0052] like Figure 1 and 2 As shown, a water vapor absorption tower 50 is also provided between the pyrolysis furnace 30 and the incinerator 40. The water vapor absorption tower 50 is used to absorb water vapor in the pyrolysis gas. Specifically, the water vapor absorption tower 50 adopts a packed tower design, mainly including a pyrolysis gas inlet, a pyrolysis gas outlet, and a packing layer. The pyrolysis gas enters through the pyrolysis gas inlet, flows through the packing layer, and then flows out through the pyrolysis gas outlet. The packing layer uses anhydrous calcium chloride solid, which has a significant dehumidification effect, to absorb a large amount of water vapor in the pyrolysis gas and prevent water vapor from entering the incinerator 40 and affecting the combustion effect of the pyrolysis gas.

[0053] Please refer to Figure 7 The incinerator 40 is used to combust the pyrolysis gas and supply heat to the heating jacket 302. The incinerator 40 is connected to the pyrolysis furnace 30 through the steam absorption tower 50, and the pyrolysis gas, after being dried by the steam absorption tower 50, enters the incinerator 40. The incinerator 10 is provided with a heat storage body 401 for air inflow, a gas nozzle 402, and a flue gas duct 403, wherein one end of the flue gas duct 403 is connected to the combustion chamber of the incinerator 40, and the other end is connected to the heating jacket 302, and the heat storage body 401 is disposed on the flue gas duct 403.

[0054] The incinerator 40 described here has a conical structure at both ends. One end is a pyrolysis gas inlet 406, connected to the inner furnace body 301; the other end is equipped with a heat storage body 401 and a gas nozzle 402. The hot air nozzle 405 of the heat storage body 401 and the gas nozzle 402 are arranged opposite to the pyrolysis gas inlet 406. The heat storage body 401 is specifically a honeycomb ceramic heat storage body, and an air inlet 404 is provided on the side facing away from the incinerator 40. External air enters the heat storage body 401 through the air inlet 404 for preheating and then is injected into the interior of the incinerator 40 through the hot air nozzle 405.

[0055] like Figure 6 , 7 As shown in Figure 8, the pyrolysis gas mixes with air and coal gas in the incinerator 40 and then burns. The internal temperature of the incinerator 40 can be maintained at around 1000℃ to prevent the formation of thermal NOx and air pollution. At the same time, the high-temperature flue gas generated by combustion flows along the flue gas pipe 403 through the heat storage body 401 to the heating jacket 302. The high-temperature flue gas exchanges heat with the air in the heat storage body 401 and cools down to around 800℃. After the high-temperature air enters the heating jacket 302, it heats the inner furnace body 301 to just the temperature required for the pyrolysis of kitchen waste.

[0056] Specifically, after the kitchen waste, preheated to approximately 200°C in the solid-liquid separation section 215, is fed into the pyrolysis furnace 30, in the initial stage of pyrolysis, flue gas from coal gas combustion is introduced into the heating jacket 302 to heat the kitchen waste to approximately 500°C, the pyrolysis produces gaseous pyrolysis gas and solid coke. The pyrolysis gas continues to burn, further heating the heating jacket 302, while the coke is transported via the discharge auger 308 to the sealed container 309 for sealing and cooling. Simultaneously, the wastewater generated during the kitchen waste pretreatment process undergoes primary wastewater purification treatment using the coke stored in the sealed container 309, which also cools the coke. The coke is then transported out and further processed to be converted into biochar for reuse.

[0057] The pyrolysis gas generated in the pyrolysis furnace 30 is dried by the steam absorption tower 50 before being introduced into the incinerator 40. Simultaneously, an appropriate ratio of air and coal gas is introduced into the incinerator 40, and after thorough mixing, combustion produces flue gas at a temperature of approximately 1000°C. The temperature of the incinerator 40 is maintained at approximately 1000°C because combustion of the pyrolysis gas is more complete and produces less thermal NOx gas at this temperature.

[0058] High-temperature flue gas at 1000℃ is introduced into the heating jacket 302 through the flue gas pipe 403. As the flue gas passes through the heat storage body 401, its temperature drops to approximately 800℃ due to heat exchange with the air. This 800℃ high-temperature flue gas then heats the kitchen waste inside the inner furnace body 301 to its pyrolysis temperature of approximately 500℃. Since the 800℃ high-temperature flue gas is sufficient to reach the pyrolysis temperature of the kitchen waste in the heating jacket 302, there is no need to use flue gas from coal gas combustion to further heat the heating jacket 302. Simultaneously, the high-temperature flue gas in the flue gas pipe 403 also preheats the air, enabling more efficient combustion of the pyrolysis gas. This achieves heat recycling, resource utilization of kitchen waste, and energy conservation and emission reduction.

[0059] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle for in-situ pyrolysis of kitchen waste, characterized in that: The system includes a vehicle body and a waste treatment system mounted on the vehicle body. The waste treatment system includes a crusher, a sealed conveying device, a pyrolysis furnace, and an incinerator. The crusher is used to receive external kitchen waste and crush it. The sealing conveying device includes a feed pipe with a feed inlet connected to the crusher in the middle. One end of the feed pipe is connected to the pyrolysis furnace, and an openable valve is provided on the side of the feed inlet closer to the pyrolysis furnace. The other end of the feed pipe is provided with a hydraulic push rod that can move toward and away from the valve. The output end of the hydraulic push rod is connected to a piston with a diameter equal to the inner diameter of the feed pipe. When the output end of the hydraulic push rod is on the side of the feed inlet away from the valve, the valve is closed, and when the output end of the hydraulic push rod is on the side of the feed inlet closer to the valve, the valve is open. A solid-liquid separation section is provided on the end of the feed pipe near the pyrolysis furnace. The solid-liquid separation section includes a tubular solid-liquid separation ceramic membrane, a wastewater tank surrounding the tubular solid-liquid separation ceramic membrane, a preheating sleeve surrounding the wastewater tank, and a shaftless spiral body disposed inside the tubular solid-liquid separation ceramic membrane. The diameter of the tubular solid-liquid separation ceramic membrane decreases along the direction away from the valve. The pyrolysis furnace includes an inner furnace body and a heating jacket surrounding the inner furnace body. High-temperature gas flows through the heating jacket to heat the inner furnace body, so that the kitchen waste in the pyrolysis furnace is pyrolyzed to form pyrolysis gas and coke. The incinerator is connected to the pyrolysis furnace to receive pyrolysis gas. The incinerator is equipped with a heat storage body for air inflow, a gas nozzle, and a flue gas pipe. One end of the flue gas pipe is connected to the incinerator, and the other end is connected to the heating jacket. The heat storage body is disposed on the flue gas pipe. The high-temperature flue gas formed by the combustion of pyrolysis gas in the incinerator flows along the flue gas pipe, through the heat storage body, and to the heating jacket. The high-temperature flue gas exchanges heat with air in the heat storage body and cools down to the temperature required for the pyrolysis of kitchen waste.

2. The in-situ pyrolysis vehicle for kitchen waste as described in claim 1, characterized in that: The pyrolysis furnace is equipped with a discharge auger for transporting coke and a sealed box connected to the discharge auger. The sealed box is equipped with a nozzle for spraying the coke with waste liquid from the pretreatment of kitchen waste, thereby purifying the waste liquid and cooling the coke.

3. The in-situ pyrolysis vehicle for kitchen waste as described in claim 1, characterized in that: The incinerator has a conical structure at both ends. One end is a pyrolysis gas inlet connected to the inner furnace body; the other end is equipped with the heat storage body and the gas nozzle. The hot air nozzle of the heat storage body and the gas nozzle are arranged opposite to the pyrolysis gas inlet.

4. The in-situ pyrolysis vehicle for kitchen waste as described in claim 1, characterized in that: It also includes a water vapor absorption tower disposed between the pyrolysis furnace and the incinerator, the water vapor absorption tower being used to absorb water vapor in the pyrolysis gas.

5. The in-situ pyrolysis vehicle for kitchen waste as described in claim 1, characterized in that: It also includes a tubular conveyor belt, one end of which is connected to the crusher and the other end of which is connected to the feed inlet of the feed pipe.

6. The in-situ pyrolysis vehicle for kitchen waste as described in claim 1, characterized in that: The sealed conveying device also includes an oil-water separator, which is connected to the wastewater tank via an oil drain pipe.

7. The in-situ pyrolysis vehicle for kitchen waste as described in claim 6, characterized in that: The oil-water separator is equipped with an oil-water separation ceramic membrane in the middle. The top of the oil-water separator is connected to an oil storage tank, the bottom is connected to the oil drain pipe, and the side wall of the oil-water separator is connected to a waste liquid tank.

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