Kitchen garbage resourceful treatment device

Abstract

The utility model belongs to the technical field of solid waste treatment, and discloses a kitchen garbage resourceful treatment device. The treatment device comprises a kitchen garbage grading treatment unit, a deodorization unit, a heat supply unit, a flue gas treatment unit and a PLC (Programmable Logic Controller) automatic control unit. According to the characteristics of high oil content and high organic matter content of kitchen garbage, swill oil is separated through a physical method, then water in the kitchen garbage is used as a catalyst and a reactant, a subcritical hydrothermal liquefaction reaction is carried out, bio-oil, a water-phase product and biochar are produced, the bio-oil can be used for refining biodiesel, and the water-phase product can be used for refining biochar. The water-phase product can be used for producing liquid water fertilizer, the biochar can be used for agriculture and fuel, harmless, recycling and high-value utilization of the kitchen garbage can be realized, the fertilizer is turned into wealth, potential environmental and health risks caused by improper treatment of the kitchen garbage are avoided, resource waste is reduced, and the environmental, economic and social benefits are remarkable.

Description

Technical Field

[0001] This utility model relates to the field of solid waste treatment technology, and in particular to a device for the resource utilization of kitchen waste. Background Technology

[0002] Kitchen waste refers to easily perishable organic waste generated in daily life, food processing, catering services, and institutional catering activities. It mainly includes fruit peels and vegetable scraps, leftover food, tea dregs, restaurant / canteen leftovers, expired ingredients, and food processing waste. With the increase in urbanization rate, the expansion of the catering industry, and changes in consumption patterns in my country, the amount of kitchen waste generated in my country is increasing year by year. Kitchen waste is characterized by high water content (60-90%), high organic matter content (accounting for more than 80% of dry matter), rich in nutrients such as nitrogen and phosphorus, and easy to perish and produce foul odors. Improper disposal can cause serious environmental pollution, disease transmission, and resource waste.

[0003] Currently, the mainstream technologies for food waste disposal both domestically and internationally include aerobic composting, anaerobic digestion, black soldier fly larvae farming, and co-incineration power generation. However, these technologies suffer from drawbacks such as long disposal cycles, low technological maturity, large land occupation, poor environmental and economic benefits, and the need for government subsidies. There is an urgent need to develop an economical, efficient, safe, and environmentally friendly resource-based disposal technology. In recent years, numerous research and explorations into food waste resource-based disposal technologies have been conducted both domestically and internationally. For example, Chinese patent application CN115947624A discloses a system for preparing organic fertilizer from food waste, which involves hydrolysis and the addition of chemical fertilizers; Chinese patent application CN115971211A discloses a method and system for the full-component resource utilization of food waste based on hot water hydrolysis, which prepares bio-oil, leaf fertilizer, and soil conditioner through steps such as crushing and sorting, low-temperature hot water hydrolysis, high-temperature hot water hydrolysis, and blending; and Chinese patent application CN104148357A discloses a method and apparatus for treating organic solid waste. However, none of the above solutions have achieved the maximum resource utilization of kitchen waste, resulting in low economic and environmental benefits, and the technology still needs improvement. Utility Model Content

[0004] The purpose of this utility model is to provide a kitchen waste resource utilization device to solve the problems of existing kitchen waste treatment devices having long treatment cycles, large footprints, poor environmental and economic benefits, and failing to maximize the resource utilization of kitchen waste.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] This utility model provides a kitchen waste resource utilization device, including a kitchen waste grading and processing unit, a deodorization unit 8, a heating unit, a flue gas treatment unit 21, and a PLC automatic control unit 26;

[0007] The kitchen waste grading and treatment unit includes, in sequence, a factory waste storage tank 2, a kitchen waste sorting unit 5, a kitchen waste crushing and pulping unit 7, a primary slurry heating and storage unit 9, an oil-water-solid three-phase separation unit 11, a solid-water mixing and secondary grinding unit 13, a secondary slurry heating and storage unit 14, a tertiary slurry reaction unit 15, a reaction product storage and separation unit 16, and an oil-solid storage unit 18; the kitchen waste sorting unit 5 is also connected to a separated material storage unit 4; the oil-water-solid three-phase separation unit 11 is also connected to a swill oil storage unit 12; and the reaction product storage and separation unit 16 is also connected to a liquid fertilizer storage unit 17.

[0008] The sealed room 1 includes the factory waste storage pool 2, the separated material storage unit 4, the kitchen waste sorting unit 5, and the kitchen waste crushing and pulping unit 7; the deodorization unit 8 is connected to the sealed room 1;

[0009] The heating unit includes a biomass boiler 20 and a thermal oil heater 19 connected in sequence; the thermal oil in the thermal oil heater 19 flows sequentially through the tertiary slurry reaction unit 15, the secondary slurry heating and storage unit 14, and the primary slurry heating and storage unit 9 in the thermal oil heating pipe 22 and then flows back to the thermal oil heater 19.

[0010] The flue gas treatment unit 21 is connected to the biomass boiler 20;

[0011] The PLC automatic control unit 26 is connected to the kitchen waste sorting unit 5, the kitchen waste crushing and pulping unit 7, the primary slurry heating and storage unit 9, the oil-water-solid three-phase separation unit 11, the solid-water mixing and secondary grinding unit 13, the secondary slurry heating and storage unit 14, the tertiary slurry reaction unit 15, the deodorization unit 8, and the flue gas treatment unit 21.

[0012] Preferably, in the aforementioned kitchen waste resource utilization device, in the kitchen waste grading and processing unit, the factory waste storage pool 2 is connected to the kitchen waste sorting unit 5 via a valve 3; the oil-water-solid three-phase separation unit 11 is connected to the swill oil storage unit 12 via a valve; the reaction product storage and separation unit 16 is connected to the oil-solid storage unit 18 via a valve; and the reaction product storage and separation unit 16 is connected to the liquid fertilizer storage unit 17 via a valve.

[0013] Preferably, in the aforementioned kitchen waste resource utilization device, in the kitchen waste grading unit, the kitchen waste separated from the kitchen waste sorting unit 5 is pumped to the kitchen waste crushing and pulping unit 7 via pump 6; the slurry from the kitchen waste crushing and pulping unit 7 is pumped to the primary slurry heating and storage unit 9; the primary kitchen waste slurry from the primary slurry heating and storage unit 9 is pumped to the oil-water-solid three-phase separation unit 11; the solid and water phases separated by the oil-water-solid three-phase separation unit 11 are pumped to the solid-water mixing secondary grinding unit 13; the secondary grinding slurry from the solid-water mixing secondary grinding unit 13 is pumped to the secondary slurry heating and storage unit 14; the slurry from the secondary slurry heating and storage unit 14 is pumped to the tertiary slurry reaction unit 15; and the reaction products from the tertiary slurry reaction unit 15 are pumped to the reaction product storage and separation unit 16.

[0014] Preferably, in the aforementioned kitchen waste resource utilization device, the primary slurry heating and storage unit 9 in the kitchen waste grading and processing unit is provided with a first stirring device 10-1 and a first heating device 25-3.

[0015] Preferably, in the aforementioned kitchen waste resource utilization device, in the kitchen waste grading and processing unit, the secondary slurry heating and storage unit 14 is provided with a second stirring device 10-2 and a second heating device 25-2.

[0016] Preferably, in the aforementioned kitchen waste resource utilization device, the kitchen waste grading unit includes a third stirring device 10-3 and a third heating device 25-1 inside the three-stage slurry reaction unit 15.

[0017] As can be seen from the above technical solution, compared with the prior art, this utility model has the following beneficial effects:

[0018] (1) The kitchen waste resource utilization treatment device provided by this utility model has a short reaction time and fast processing speed, and the reaction can be completed in 0.5~2 hours. At the same time, the treatment device occupies a small area, which is only 1 / 10 of other products of the same tonnage.

[0019] (2) The kitchen waste resource utilization device provided by this utility model is completely harmless when processing kitchen waste. Since the reaction is carried out under medium temperature (260~350℃) and high pressure (5~15MPa) conditions, viruses and bacteria are completely inactivated, ensuring product safety and hygiene.

[0020] (3) The kitchen waste resource utilization device provided by this utility model does not require dehydration when processing kitchen waste, and has low energy consumption. The water in the kitchen waste is the catalyst and reactant required for the reaction, so there is no need to dry and dehydrate, and the energy consumption is low.

[0021] (4) The kitchen waste resource utilization device provided by this utility model makes the kitchen waste highly resource-efficient, realizes 100% resource utilization of kitchen waste, and produces high-value products such as swill oil, bio-oil, biochar, and liquid water-soluble fertilizer, turning fertilizer into treasure.

[0022] (5) The kitchen waste resource utilization device provided by this utility model has a clean and hygienic environment, and the production is completely enclosed. The kitchen waste storage and sorting process is separately enclosed. Since the raw materials and products are in pipelines or reaction containers, the other processes are odorless in the factory area and workshop, and no high-frequency noise is generated. No wastewater is generated in the entire production process. The sorted waste residue is recycled or landfilled, which is environmentally friendly. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a schematic diagram of a kitchen waste resource recovery device.

[0025] Among them, 1-sealed room, 2-factory waste storage pool, 3-valve, 4-separated material storage unit, 5-kitchen waste sorting unit, 6-pump, 7-kitchen waste crushing and pulping unit, 8-deodorization unit, 9-primary slurry heating and storage unit, 10-1 is the first stirring device, 10-2 is the second stirring device, 10-3 is the third stirring device, 11-oil-water-solid three-phase separation unit, 12-swill oil storage unit, 13-solid-water mixing and secondary grinding unit, 14-secondary stage 15-Slurry heating and storage unit, 16-Third-stage slurry reaction unit, 17-Reaction product storage and separation unit, 18-Liquid water and fertilizer storage unit, 19-Oil and solid storage unit, 20-Thermal oil furnace, 21-Biomass boiler, 22-Flue gas treatment unit, 23-Thermal oil heating pipe, 24-Aqueous phase product, 25-1 Third heating device, 25-2 Second heating device, 25-3 First heating device, 26-PLC automatic control unit. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model embodiment provides a kitchen waste resource utilization treatment device, such as... Figure 1 As shown, it includes a kitchen waste grading and processing unit, a deodorization unit 8, a heating unit, a flue gas treatment unit 21, and a PLC automatic control unit 26;

[0028] The kitchen waste grading and treatment unit includes, in sequence, a factory waste storage tank 2, a kitchen waste sorting unit 5, a kitchen waste crushing and pulping unit 7, a primary slurry heating and storage unit 9, an oil-water-solid three-phase separation unit 11, a solid-water mixing and secondary grinding unit 13, a secondary slurry heating and storage unit 14, a tertiary slurry reaction unit 15, a reaction product storage and separation unit 16, and an oil-solid storage unit 18; the kitchen waste sorting unit 5 is also connected to a separated material storage unit 4; the oil-water-solid three-phase separation unit 11 is also connected to a swill oil storage unit 12; and the reaction product storage and separation unit 16 is also connected to a liquid fertilizer storage unit 17.

[0029] The sealed room 1 includes the factory waste storage pool 2, the separated material storage unit 4, the kitchen waste sorting unit 5, and the kitchen waste crushing and pulping unit 7; the deodorization unit 8 is connected to the sealed room 1;

[0030] The heating unit includes a biomass boiler 20 and a thermal oil heater 19 connected in sequence; the thermal oil in the thermal oil heater 19 flows sequentially through the tertiary slurry reaction unit 15, the secondary slurry heating and storage unit 14, and the primary slurry heating and storage unit 9 in the thermal oil heating pipe 22 and then flows back to the thermal oil heater 19.

[0031] The flue gas treatment unit 21 is connected to the biomass boiler 20;

[0032] The PLC automatic control unit 26 is connected to the kitchen waste sorting unit 5, the kitchen waste crushing and pulping unit 7, the primary slurry heating and storage unit 9, the oil-water-solid three-phase separation unit 11, the solid-water mixing and secondary grinding unit 13, the secondary slurry heating and storage unit 14, the tertiary slurry reaction unit 15, the deodorization unit 8, and the flue gas treatment unit 21.

[0033] Furthermore, the factory waste storage pool 2 is connected to the kitchen waste sorting unit 5 via valve 3; the oil-water-solid three-phase separation unit 11 is connected to the swill oil storage unit 12 via valve; the reaction product storage and separation unit 16 is connected to the oil-solid storage unit 18 via valve; and the reaction product storage and separation unit 16 is connected to the liquid fertilizer storage unit 17 via valve.

[0034] Furthermore, the kitchen waste separated in the kitchen waste sorting unit 5 is pumped to the kitchen waste crushing and pulping unit 7 via pump 6; the slurry from the kitchen waste crushing and pulping unit 7 is pumped to the primary slurry heating and storage unit 9; the primary kitchen waste slurry from the primary slurry heating and storage unit 9 is pumped to the oil-water-solid three-phase separation unit 11; the solid and water phases separated by the oil-water-solid three-phase separation unit 11 are pumped to the solid-water mixing secondary grinding unit 13; the secondary grinding slurry from the solid-water mixing secondary grinding unit 13 is pumped to the secondary slurry heating and storage unit 14; the slurry from the secondary slurry heating and storage unit 14 is pumped to the tertiary slurry reaction unit 15; and the reaction products from the tertiary slurry reaction unit 15 are pumped to the reaction product storage and separation unit 16.

[0035] Furthermore, the primary slurry heating and storage unit 9 is internally equipped with a first stirring device 10-1 and a first heating device 25-3. The heating method of the primary slurry heating and storage unit 9 is heat transfer by heat transfer oil supplemented by electric heating.

[0036] Furthermore, the secondary slurry heating and storage unit 14 is internally equipped with a second stirring device 10-2 and a second heating device 25-2. The heating method of the secondary slurry heating and storage unit 14 is heat transfer by heat transfer oil supplemented by electric heating.

[0037] Furthermore, the three-stage slurry reaction unit 15 is equipped with a third stirring device 10-3 and a third heating device 25-1. The heating method of the three-stage slurry reaction unit 15 is heat transfer by heat transfer oil supplemented by electric heating.

[0038] Furthermore, in the heating unit, the heat transfer oil in the heat transfer oil furnace 19 transfers heat by flowing through the heat transfer oil heating pipe 22; at the same time, the heat transfer oil flows sequentially through the three-stage slurry reaction unit 15, the two-stage slurry heating and storage unit 14, and the primary slurry heating and storage unit 9, providing heat to the above units, heating the reaction products, and realizing the cascade utilization of energy in the heating process.

[0039] Furthermore, the PLC automatic control unit 26 controls the operation of the connected kitchen waste sorting unit 5, kitchen waste crushing and pulping unit 7, primary slurry heating and storage unit 9, oil-water-solid three-phase separation unit 11, solid-water mixing and secondary grinding unit 13, secondary slurry heating and storage unit 14, tertiary slurry reaction unit 15, deodorization unit 8, and flue gas treatment unit 21.

[0040] Furthermore, the kitchen waste resource recovery device of this utility model embodiment achieves the resource recovery of kitchen waste through the following steps:

[0041] Step 1: Kitchen waste from sources such as food waste, household kitchen waste, and fruit and vegetable markets is transported to the resource utilization plant via the kitchen waste collection and transportation unit. It is stored in the plant's waste storage pool 2, and then fed into the kitchen waste sorting unit 5 via valve 3 for sorting. The separated materials (plastics, metals, ceramics, chopsticks, sand, etc.) are transported to the separated material storage unit 4 for further separation. Ceramics and sand are ultimately disposed of in landfills, while chopsticks, metals, and plastics are utilized as resources. The separated kitchen waste is then pumped to the kitchen waste crushing and pulping unit 7 via pump 6 for crushing to obtain a slurry with a particle size ≤1mm. The crushed slurry is then pumped to the primary slurry heating and storage unit 9. Simultaneously, the sealed room 1 is set to a slight negative pressure of -5 to -20Pa, allowing the collected odorous gases to enter the deodorization unit 8 for treatment before being discharged in compliance with standards.

[0042] Step 2: The slurry in the primary slurry heating and storage unit 9 is reacted for 0.5-2 hours at atmospheric pressure, temperature 80-100℃ (heat transfer oil supplemented with electric heating), and stirring speed 100-600 rpm. The resulting primary slurry is pumped to the oil-water-solid three-phase separation unit 11 for separation to obtain swill oil, solid phase, and aqueous phase. The valve is opened to pump the swill oil to the swill oil storage unit 12 for the preparation of biodiesel. The solid phase and aqueous phase are mixed by pump and pumped to the solid-water mixing secondary grinding unit 13 for grinding to obtain a secondary grinding slurry with a particle size ≤76μm. The secondary grinding slurry is pumped to the secondary slurry heating and storage unit 14 and reacted for 0.5-2 hours at pressure 0.1-1MPa, temperature 100-180℃ (heat transfer oil supplemented with electric heating), and stirring speed 100-600 rpm. The resulting slurry is pumped to the tertiary slurry reaction unit 15.

[0043] Step 3: The slurry in the three-stage slurry reaction unit 15 is reacted for 0.5 to 2 hours at a pressure of 5~15MPa, a temperature of 260~350℃ (heat transfer oil supplemented by electric heating), and a stirring speed of 100~600rpm to obtain the reaction product. After the reaction is completed, the pressure is reduced and cooled. When the temperature of the three-stage slurry reaction unit 15 drops to ≤150℃, the exhaust valve is opened to release the pressure and reduce it to atmospheric pressure. The reaction product is then pumped to the reaction product storage and separation unit 16 for separation to obtain aqueous product 23 and oil-solid mixed phase product 24. The valve is opened, and the aqueous product 23 is transported to the liquid fertilizer storage unit 17 for the preparation of liquid fertilizer. The valve is opened, and the oil-solid mixed phase product 24 is transported to the oil-solid storage unit 18 for high-value utilization (the heat transferred by the heat transfer oil comes from the combustion of biomass pellets in the biomass boiler 20, which generates flue gas. The flue gas in the biomass boiler 20 is collected and treated by the flue gas treatment unit 21, and then discharged in compliance with standards).

[0044] Example 1

[0045] This embodiment provides a method using Figure 1 The kitchen waste recycling device shown performs the recycling of kitchen waste, including the following steps:

[0046] Step 1: Kitchen waste (dry basis organic composition: 65wt% carbohydrates (including 15wt% cellulose), 20wt% protein, 15wt% lipids, including meat scraps, expired bread, fruit peels, bones, seasoning residues (star anise, cinnamon, etc.), vegetable stems and leaves, etc.; physical characteristics: moisture content 80wt%) is transported to the resource utilization plant through the kitchen waste collection and transportation unit. It is stored in the plant's waste storage pool and then sent to the kitchen waste sorting unit for sorting. The separated materials (plastics, metals, ceramics, chopsticks, sand and gravel) are transported to the separated material storage unit for further separation. The ceramics and sand and gravel are eventually disposed of in landfills, while the chopsticks, metals, and plastics are utilized as resources. The separated kitchen waste is pumped to the kitchen waste crushing and pulping unit for crushing to obtain a slurry with a particle size ≤1mm. The crushed slurry is pumped to the primary slurry heating and storage unit. At the same time, the sealed room is set to a slight negative pressure (pressure value -10Pa) so that the collected odor enters the deodorization unit and is treated to meet emission standards.

[0047] Step 2: The slurry in the primary slurry heating and storage unit is reacted for 0.5 hours at atmospheric pressure, temperature 80℃ (heat transfer oil supplemented with electric heating), and stirring speed 300 rpm. The resulting primary slurry is pumped to the oil-water-solid three-phase separation unit for separation to obtain swill oil, solid phase, and aqueous phase. The valve is opened to transport the swill oil to the swill oil storage unit for the preparation of biodiesel. The solid phase and aqueous phase are mixed and pumped to the solid-water mixing secondary grinding unit for grinding to obtain a secondary grinding slurry with a particle size ≤76μm. The secondary grinding slurry is pumped to the secondary slurry heating and storage unit and reacted for 0.5 hours at a pressure of 0.1MPa, temperature 160℃ (heat transfer oil supplemented with electric heating), and stirring speed 300 rpm. The resulting slurry is then pumped to the tertiary slurry reaction unit.

[0048] Step 3: The slurry in the three-stage slurry reaction unit reacts for 1 hour at a pressure of 10 MPa, a temperature of 300℃ (heat transfer oil supplemented by electric heating), and a stirring speed of 200 rpm to obtain the reaction product. After the reaction is completed, the pressure is reduced and cooled. When the temperature of the three-stage slurry reaction unit drops to ≤150℃, the exhaust valve is opened to release the pressure and reduce it to atmospheric pressure. The reaction product is then pumped to the reaction product storage and separation unit for separation to obtain the aqueous phase product and the oil-solid mixed phase product. The valve is opened, and the aqueous phase product is transported to the liquid fertilizer storage unit for the preparation of liquid fertilizer. The valve is opened, and the oil-solid mixed phase product is transported to the oil-solid storage unit for high-value utilization (the heat transferred by the heat transfer oil comes from the combustion of biomass pellets in the biomass boiler, which generates flue gas. The flue gas in the biomass boiler is collected and treated by the flue gas treatment unit to achieve emission standards).

[0049] In step 2, the yield of swill oil is 5% of the weight of the primary slurry of kitchen waste. Its main component is triglycerides (accounting for 95 wt% in swill oil), and it also contains a small amount (accounting for 5 wt% in swill oil) of substances such as aldehydes, ketones, lactones and peroxides.

[0050] In step 3, the yield of the aqueous phase product is 75% of the weight of the primary kitchen waste slurry. Its main components are dissolved organic carbon (40 g / L), total nutrients of N+P2O5+K2O (6 g / L), and trace elements such as Zn, Mg, Ca, Fe, and Cu (5 g / L).

[0051] In step 3, the oil-solid mixed-phase product mainly consists of bio-oil and biochar. The yield of bio-oil is 12% of the weight of the primary kitchen waste slurry, and the bio-oil mainly contains 50 wt% alkanes, 25 wt% cycloalkanes, 15 wt% aromatic hydrocarbons, and 10 wt% non-hydrocarbon compounds; the yield of biochar is 3% of the weight of the primary kitchen waste slurry.

[0052] In summary, the kitchen waste resource utilization device developed in this utility model, based on the characteristics of high oil content and high organic matter content of kitchen waste, separates the swill oil through physical methods, and then uses the water in the kitchen waste as a catalyst and reactant to carry out a subcritical hydrothermal liquefaction reaction to produce bio-oil, aqueous products, and biochar. The bio-oil can be used to refine biodiesel, the aqueous products can be used to produce liquid fertilizer, and the biochar can be used for agricultural and fuel purposes. It can realize the harmless, resource-based, and high-value utilization of kitchen waste, producing high-value products such as swill oil, bio-oil, biochar, and liquid water-soluble fertilizer, turning fertilizer into treasure, avoiding potential environmental and health risks caused by improper disposal of kitchen waste, reducing resource waste, and achieving significant environmental, economic, and social benefits. It is an economical, efficient, and environmentally friendly solution.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A kitchen waste resource recovery device, characterized in that, It includes a kitchen waste grading and treatment unit, a deodorization unit (8), a heating unit, a flue gas treatment unit (21), and a PLC automatic control unit (26). The kitchen waste grading and treatment unit includes, in sequence, a factory waste storage tank (2), a kitchen waste sorting unit (5), a kitchen waste crushing and pulping unit (7), a primary slurry heating and storage unit (9), an oil-water-solid three-phase separation unit (11), a solid-water mixing and secondary grinding unit (13), a secondary slurry heating and storage unit (14), a tertiary slurry reaction unit (15), a reaction product storage and separation unit (16), and an oil-solid storage unit (18); the kitchen waste sorting unit (5) is also connected to a separated material storage unit (4); the oil-water-solid three-phase separation unit (11) is also connected to a swill oil storage unit (12); and the reaction product storage and separation unit (16) is also connected to a liquid fertilizer storage unit (17). The sealed room (1) includes the factory waste storage pool (2), the separated material storage unit (4), the kitchen waste sorting unit (5), and the kitchen waste crushing and pulping unit (7); the deodorization unit (8) is connected to the sealed room (1); The heating unit includes a biomass boiler (20) and a thermal oil heater (19) connected in sequence; the thermal oil in the thermal oil heater (19) flows sequentially through the three-stage slurry reaction unit (15), the two-stage slurry heating and storage unit (14), and the primary slurry heating and storage unit (9) in the thermal oil heating pipe (22) and flows back to the thermal oil heater (19). The flue gas treatment unit (21) is connected to the biomass boiler (20); The PLC automatic control unit (26) is connected to the kitchen waste sorting unit (5), the kitchen waste crushing and pulping unit (7), the primary slurry heating and storage unit (9), the oil-water-solid three-phase separation unit (11), the solid-water mixing and secondary grinding unit (13), the secondary slurry heating and storage unit (14), the tertiary slurry reaction unit (15), the deodorization unit (8), and the flue gas treatment unit (21).

2. The kitchen waste resource utilization device according to claim 1, characterized in that, In the kitchen waste grading and treatment unit, the factory waste storage pool (2) is connected to the kitchen waste sorting unit (5) through a valve (3); the oil-water-solid three-phase separation unit (11) is connected to the swill oil storage unit (12) through a valve; the reaction product storage and separation unit (16) is connected to the oil-solid storage unit (18) through a valve; and the reaction product storage and separation unit (16) is connected to the liquid water-fertilizer storage unit (17) through a valve.

3. The kitchen waste resource utilization device according to claim 1, characterized in that, In the kitchen waste grading and treatment unit, the kitchen waste separated from the kitchen waste sorting unit (5) is pumped (6) to the kitchen waste crushing and pulping unit (7); the slurry from the kitchen waste crushing and pulping unit (7) is pumped to the primary slurry heating and storage unit (9); the primary kitchen waste slurry from the primary slurry heating and storage unit (9) is pumped to the oil-water-solid three-phase separation unit (11); the solid and water phases separated by the oil-water-solid three-phase separation unit (11) are pumped to the solid-water mixing secondary grinding unit (13); the secondary grinding slurry from the solid-water mixing secondary grinding unit (13) is pumped to the secondary slurry heating and storage unit (14); the slurry from the secondary slurry heating and storage unit (14) is pumped to the tertiary slurry reaction unit (15); and the reaction products from the tertiary slurry reaction unit (15) are pumped to the reaction product storage and separation unit (16).

4. The kitchen waste resource utilization device according to claim 1, characterized in that, In the kitchen waste grading and processing unit, the primary slurry heating and storage unit (9) is equipped with a first stirring device (10-1) and a first heating device (25-3).

5. The kitchen waste resource utilization device according to claim 1, characterized in that, In the kitchen waste grading and processing unit, the secondary slurry heating and storage unit (14) is equipped with a second stirring device (10-2) and a second heating device (25-2).

6. The kitchen waste resource utilization device according to claim 1, characterized in that, In the kitchen waste grading and treatment unit, the three-stage slurry reaction unit (15) is equipped with a third stirring device (10-3) and a third heating device (25-1).

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