A pyrolysis system and method for removing germs and salts from manure and food waste

Abstract

The present invention relates to a pyrolysis system and method for removing germs and salts from fecal sewage and food waste. The system includes a pulverizing device, a stirring pyrolysis device, a dry-wet separation device, a heat preservation water tank, a plate heat exchanger, a steam device, a sewage treatment device, and an organic fertilizer raw material collection box; the pulverizing device pulverizes human fecal sewage or food waste into organic matter powder, and the stirring pyrolysis device uses steam to perform high-temperature pyrolysis sterilization on the organic matter powder, which is beneficial to removing germs in the organic matter powder; by heating with steam and diluting the organic solid-liquid mixture of the organic matter powder with water, after three times of hot water dilution for desalination, the salt molecule content of the fecal sewage or food waste can be effectively reduced, and the organic fertilizer raw material without harmful germs and salts is obtained through separation by the dry-wet separation device; the present invention can effectively remove the germs and salts of human fecal sewage or food waste, and the produced organic fertilizer raw material is safe and non-toxic, beneficial to plant growth, and will not damage the ecological environment such as soil and groundwater.

Description

Technical Field

[0001] The present invention relates to the technical fields of pyrolysis technology, water dissolution technology, and fecal sewage and food waste treatment technology, and particularly relates to a pyrolysis system and method for removing germs and salts from fecal sewage and food waste. Background Art

[0002] Since human fecal sewage and organic wastes including but not limited to food waste, other organic wastes, leachate, sludge, etc. are organic matters with high nutrient content and are the best raw materials for organic fertilizers, while human fecal sewage and food waste have high salt content, which is not conducive to crop growth; moreover, human fecal sewage contains germs and toxins, especially the fecal sewage of hospitals. If it is used without being disinfected and exterminated, it is not suitable for crop fertilization and will affect human health. Therefore, at present, except for a small amount of food waste being processed into organic fertilizer for greening and soil remediation, most of the human fecal sewage is landfilled, wasting organic resources and land. In the long run, it will pollute the soil, groundwater, and air. Solving the problems of germs, viruses, and salts in organic matters such as fecal sewage, food waste, and other organic wastes, this is still a renewable resource that cycles continuously and is inexhaustible. Summary of the Invention

[0003] In order to solve the technical problems that human fecal sewage and food waste have high salt content and are not conducive to crop growth, and will cause environmental pollution after being made into organic fertilizer, the present invention provides a pyrolysis system and method for removing germs and salts from fecal sewage and food waste.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A pyrolysis system for removing germs and salts from fecal sewage and food waste includes a pulverizing device, a stirring and pyrolyzing device, a dry-wet separation device, a heat preservation water tank, a plate heat exchanger, a steam device, a sewage treatment device, and an organic fertilizer raw material collection box;

[0006] The pulverizing device is used to pulverize human fecal sewage and / or food waste to obtain a first organic matter powder;

[0007] The stirring and pyrolyzing device is used to stir the first organic matter powder and sterilize it by high-temperature pyrolysis with steam during the stirring process to obtain a second organic matter powder; it is also used to mix and stir the second organic matter powder with water evenly and heat it with steam during the stirring process to obtain a first organic solid-liquid mixture; wherein, the mass of the first organic matter powder in the first organic solid-liquid mixture is 3% of the mass of the first organic solid-liquid mixture;

[0008] The dry-wet separation device is used to perform dry-wet separation on the first organic solid-liquid mixture to obtain a second organic matter powder and a first separated hot aqueous solution;

[0009] The stirring pyrolysis device is also used to mix and stir the second organic powder and water evenly, and heat them with steam during the stirring process to obtain a second organic solid-liquid mixture; wherein, in the second organic solid-liquid mixture, the mass of the second organic powder is 3% of the mass of the second organic solid-liquid mixture;

[0010] The dry-wet separation device is also used to perform dry-wet separation on the second organic solid-liquid mixture to obtain a third organic powder and a second separated hot aqueous solution;

[0011] The stirring pyrolysis device is also used to mix and stir the third organic powder and water evenly, and heat them with steam during the stirring process to obtain a third organic solid-liquid mixture; wherein, in the third organic solid-liquid mixture, the mass of the third organic powder is 3% of the mass of the third organic solid-liquid mixture;

[0012] The dry-wet separation device is also used to perform dry-wet separation on the third organic solid-liquid mixture to obtain a fourth organic powder and a third separated hot aqueous solution;

[0013] The heat preservation water tank is used to store the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution;

[0014] The plate heat exchanger performs heat conversion on the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution in the heat preservation water tank, and uses the converted heat to heat cold water to obtain hot water;

[0015] The steam equipment is used to provide steam for the stirring pyrolysis device; wherein, the steam provided by the steam equipment to the stirring pyrolysis device is generated by the steam equipment heating cold water and the hot water;

[0016] The sewage treatment equipment is used to purify the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution after heat conversion by the plate heat exchanger to obtain purified water;

[0017] The organic fertilizer raw material collection box is used to store the fourth organic powder; wherein, the fourth organic powder is the raw material for making organic fertilizer.

[0018] The beneficial effects of the present invention are as follows: By using steam to perform high-temperature pyrolysis sterilization on the fecal sewage and food waste in the organic powder, it is beneficial to remove the germs in the organic powder; then using steam to heat the organic solution in which the organic powder is diluted to separate the salt molecules by hot water dilution. After the organic powder undergoes three times of hot water dilution for desalination and wet-dry separation, an organic fertilizer raw material without harmful germs and salts is obtained. Therefore, after being processed by the technical solution of the present invention, the germs and salts in the fecal sewage or food waste can be effectively removed. The organic fertilizer produced from the organic raw material after high-temperature desalination is safe and non-toxic, beneficial to plant growth, and will not cause pollution to the ecological environment such as soil and groundwater. It is beneficial that all fecal sewage and food waste of everyone no longer need to be incinerated or landfilled and can all be produced into organic fertilizer for recycling. By converting the heat of the first separated hot water solution, the second separated hot water solution, and the third separated hot water solution into the water used for steam production, it is beneficial to recover the heat remaining in the water solution in the steam equipment for heating the organic solid-liquid mixture, thereby improving the energy utilization efficiency.

[0019] On the basis of the above technical solution, the present invention can be further improved as follows.

[0020] Further, the heat preservation water tank is also used to heat the first separated hot water solution, the second separated hot water solution, and the third separated hot water solution by using secondary steam; wherein, the secondary steam is the remaining steam after the stirring pyrolysis device performs steam high-temperature pyrolysis sterilization on the first organic powder, the remaining steam after the stirring pyrolysis device heats the organic liquid obtained by stirring the second organic powder and water evenly, the remaining steam after the stirring pyrolysis device heats the organic liquid obtained by stirring the second organic powder and water evenly, and the remaining steam after the stirring pyrolysis device heats the organic liquid obtained by stirring the third organic powder and water evenly.

[0021] The beneficial effect of adopting the above further solution is that by using secondary steam to heat the first separated hot water solution, the second hot water solution, and the third separated hot water solution, the utilization rate of steam is improved, the energy utilization rate is improved, and the economy is improved.

[0022] Further, in the stirring pyrolysis device, the temperature of the steam used for performing steam high-temperature pyrolysis sterilization on the first organic powder is 130°C to 200°C, and the pressure of the steam used for sterilization is 0.25 MPa to 1.6 MPa.

[0023] Further, the time for performing steam high-temperature pyrolysis sterilization on the first organic powder in the stirring pyrolysis device lasts for at least 20 minutes.

[0024] Further, the particle size of the first organic powder is 3 mm to 5 mm.

[0025] To solve the above technical problems, the present invention also provides a pyrolysis method for removing germs and salts from fecal sewage and food waste, and its specific technical content is as follows:

[0026] A pyrolysis method for removing germs and salts from fecal sewage and food waste, comprising the following steps:

[0027] Use a pulverizing device to pulverize human fecal sewage and / or food waste to obtain a first organic matter powder;

[0028] Use a stirring pyrolysis device to stir the first organic matter powder and pyrolyze and sterilize it at high temperature with steam during the stirring process to obtain a second organic matter powder;

[0029] Use a stirring pyrolysis device to mix and stir the second organic matter powder with water evenly, and heat it with steam during the stirring process to obtain a first organic solid-liquid mixture; wherein, in the first organic solid-liquid mixture, the mass of the first organic matter powder is 3% of the mass of the first organic solid-liquid mixture;

[0030] Use a dry-wet separation device to perform dry-wet separation on the first organic solid-liquid mixture to obtain a second organic matter powder and a first separated hot aqueous solution;

[0031] Use a stirring pyrolysis device to mix and stir the second organic matter powder with water evenly, and heat it with steam during the stirring process to obtain a second organic solid-liquid mixture; wherein, in the second organic solid-liquid mixture, the mass of the second organic matter powder is 3% of the mass of the second organic solid-liquid mixture;

[0032] Use a dry-wet separation device to perform dry-wet separation on the second organic solid-liquid mixture to obtain a third organic matter powder and a second separated hot aqueous solution;

[0033] Use a stirring pyrolysis device to mix and stir the third organic matter powder with water evenly, and heat it with steam during the stirring process to obtain a third organic solid-liquid mixture; wherein, in the third organic solid-liquid mixture, the mass of the third organic matter powder is 3% of the mass of the third organic solid-liquid mixture;

[0034] Use a dry-wet separation device to perform dry-wet separation on the third organic solid-liquid mixture to obtain a fourth organic matter powder and a third separated hot aqueous solution;

[0035] Use a heat preservation water tank to store the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution;

[0036] Use a plate heat exchanger to perform heat conversion on the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution in the heat preservation water tank, and use the converted heat to heat cold water to obtain hot water.

[0037] Use a sewage treatment device to purify the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution after heat conversion by the plate heat exchanger to obtain purified water.

[0038] Use an organic fertilizer raw material collection box to store the fourth organic matter powder.

[0039] Among them, the fourth organic matter powder is a raw material for making organic fertilizer; the steam equipment provides steam for the stirring pyrolysis device; the steam provided by the steam equipment to the stirring pyrolysis device is generated by the steam equipment heating cold water and the hot water.

[0040] Further, the heat preservation water tank also uses secondary steam to heat the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution; among them, the secondary steam is the remaining steam obtained after the stirring pyrolysis device steam sterilizes the first organic matter powder, the remaining steam after the stirring pyrolysis device heats the second organic matter powder and water, the remaining steam after the stirring pyrolysis device heats the second organic matter powder and water, and the remaining steam after the stirring pyrolysis device heats the third organic matter powder and water.

[0041] Further, in the stirring pyrolysis device, the temperature of the steam for steam high-temperature pyrolysis sterilization of the first organic matter powder is 130°C to 200°C, and the pressure of the steam used for sterilization is 0.25 MPa to 1.6 MPa.

[0042] Further, the time for steam high-temperature pyrolysis sterilization of the first organic matter powder in the stirring pyrolysis device lasts at least 20 minutes.

[0043] Further, the particle size of the first organic matter powder is 3 mm to 5 mm. Description of the Drawings

[0044] Figure 1 It is a schematic structural diagram of a pyrolysis system for removing germs and salts from manure and food waste in an embodiment of the present invention.

[0045] In the drawings, the list of components represented by each reference numeral is as follows:

[0046] 1 - Crushing device, 2 - Stirring pyrolysis device, 3 - Dry-wet separation device, 4 - Heat preservation water tank, 5 - Plate heat exchanger, 6 - Steam equipment, 7 - Sewage treatment equipment, 8 - Organic fertilizer raw material collection box. Detailed implementation manners

[0047] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0048] Example 1

[0049] As Figure 1 shown, this example provides a pyrolysis system for removing germs and salts from fecal sewage and food waste, including a crushing device 1, a stirring pyrolysis device 2, a dry-wet separation device 3, a heat preservation water tank 4, a plate heat exchanger 5, a steam device 6, a sewage treatment device 7, and an organic fertilizer raw material collection box 8.

[0050] The crushing device 1 is used to crush fecal sewage and / or food waste to obtain a first organic matter powder; wherein, the particle size of the first organic matter powder is 3 mm to 5 mm.

[0051] The stirring pyrolysis device 2 is used to stir the first organic matter powder and perform high-temperature pyrolysis sterilization with steam during the stirring process to obtain a second organic matter powder; wherein, in the stirring pyrolysis device 2, the temperature of the steam used for steam sterilization of the first organic matter powder is 130°C to 200°C, and the pressure of the steam used for sterilization is 0.25 MPa to 1.6 MPa. The time for steam sterilization of the first organic matter powder in the stirring pyrolysis device 2 lasts at least 20 minutes.

[0052] The stirring pyrolysis device 2 is also used to mix the second organic matter powder with water and then heat and stir evenly with steam to obtain a first organic solid-liquid mixture; wherein, in the first organic solid-liquid mixture, the mass of the second organic matter powder is 3% of the mass of the second organic solid-liquid mixture.

[0053] The dry-wet separation device 3 is used to perform dry-wet separation on the first organic solid-liquid mixture to obtain a second organic matter powder and a first separated hot aqueous solution.

[0054] The stirring pyrolysis device 2 is also used to mix the second organic matter powder with water and then heat and stir evenly with steam to obtain a second organic solid-liquid mixture; wherein, in the second organic solid-liquid mixture, the mass of the second organic matter powder is 3% of the mass of the second organic solid-liquid mixture.

[0055] The dry-wet separation device 3 is also used to perform dry-wet separation on the second organic solid-liquid mixture to obtain a third organic matter powder and a second separated hot aqueous solution.

[0056] The stirring pyrolysis device 2 is also used to mix the third organic powder with water, heat and stir them evenly with steam to obtain a third organic solid-liquid mixture; wherein, in the third organic solid-liquid mixture, the mass of the third organic powder is 3% of the mass of the third organic solid-liquid mixture.

[0057] The dry-wet separation device 3 is also used to perform dry-wet separation on the third organic solid-liquid mixture to obtain a fourth organic powder and a third separated hot aqueous solution.

[0058] The heat preservation water tank 4 is used to store the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution, and heat the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution; the heat preservation water tank 4 is also used to heat the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution with secondary steam; wherein, the secondary steam is the remaining steam obtained after the stirring pyrolysis device 2 sterilizes the first organic powder with steam, the remaining steam after the stirring pyrolysis device 2 heats the second organic powder and water, the remaining steam after the stirring pyrolysis device 2 heats the second organic powder and water, and the remaining steam after the stirring pyrolysis device 2 heats the third organic powder and water. By using the secondary steam to heat the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution, the utilization rate of steam is improved, the energy utilization rate is improved, and the economy is improved.

[0059] The plate heat exchanger 5 is used to perform heat conversion with the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution in the heat preservation water tank 4, and heat cold water with the converted heat to obtain hot water.

[0060] The steam equipment 6 is used to provide steam for the stirring pyrolysis device 2; wherein, the steam provided by the steam equipment 6 to the stirring pyrolysis device 2 is generated by using the hot water obtained by the plate heat exchanger 5.

[0061] The sewage treatment equipment 7 is used to purify the first separated hot aqueous solution, the second separated hot aqueous solution and the third separated hot aqueous solution after heat exchange by the plate heat exchanger 5 to obtain organic sludge and purified water. The sewage treatment equipment 7 is also used to remove the salt molecules in the organic sludge, and specifically, the electrolysis method can be used to extract the salt in the organic sludge to remove the salt in the organic sludge. The organic sludge after removing the salt can also be used as a raw material for organic fertilizer.

[0062] The organic fertilizer raw material collection box 8 is used to store the fourth organic matter powder; wherein, the fourth organic matter powder is the raw material for making organic fertilizer.

[0063] Pyrolysis in the present invention refers to heating and dissolving, that is, by heating the first organic matter powder, the rate of salt molecules in the first organic matter powder dissolving in water is accelerated.

[0064] In the embodiment of the present invention, using steam to sterilize powdery manure or food waste is beneficial to removing germs in the manure and food waste; after heating the steam and then heating the powdery manure or food waste and diluting it with water three times to remove salt, the content of salt molecules in the manure or food waste can be effectively reduced, obtaining organic fertilizer raw materials without harmful germs and salts. Therefore, after being processed by the technical solution of the present invention, the germs and salts in the manure or food waste can be effectively removed. The organic fertilizer produced from the organic raw materials desalted by high-temperature pyrolysis is safe, non-toxic, beneficial to plant growth, and will not pollute the ecological environment such as soil and groundwater. It is beneficial that all manure and food waste no longer need to be incinerated or landfilled and can be all produced into organic fertilizer for recycling. Organic fertilizer with a salt content of less than 0.0023% is suitable for the growth of crops; with a salt content of less than 0.5%, it is suitable for ordinary crops; when the salt content is between 0.5% and 1.0%, it is suitable for a few crops with strong salt tolerance, such as cotton, alfalfa, tomatoes, watermelons, beets, etc. The salt content of food waste without water washing pretreatment is about 1.4%, and the salt content in human manure is less than 1.4%. In the embodiment of the present invention, if the organic matter powder is diluted three times by 3%, its salt content is 1.4% × 3% × 3% × 3% = 0.0000378%, and the salt hardly affects the growth of crops, and its residual salt can be ignored. Therefore, the salt in the manure or food waste can be effectively removed after being processed by the technical solution of the present invention. In case of individual cases where the salt content in the manure and food waste is relatively high, the provided stirring pyrolysis device 2 and dry-wet separation device 3 of the present invention can be used to dissolve and dilute the crushed manure and food waste with water multiple times to reduce the salt content in the manure and food waste until the salt hardly affects the growth of crops, that is, its residual salt can be ignored.

[0065] Embodiment 2

[0066] Based on Embodiment 1, this embodiment provides a pyrolysis method for removing germs and salts from manure and food waste, including the following steps:

[0067] S1. Use the crushing device 1 to crush the manure and / or food waste to obtain the first organic matter powder; wherein, the particle size of the first organic matter powder is 3 mm to 5 mm.

[0068] S2. Use the stirring pyrolysis device 2 to stir the first organic powder and perform high-temperature pyrolysis sterilization with steam during the stirring process to obtain a second organic powder. Among them, in the stirring pyrolysis device 2, the temperature of the steam for steam sterilization of the first organic powder is 130°C to 200°C, and the pressure of the steam used for sterilization is 0.25 MPa to 1.6 Mpa. The time for steam sterilization of the first organic powder in the stirring pyrolysis device 2 is at least 20 minutes.

[0069] S3. Use the stirring pyrolysis device 2 to mix the second organic powder with water, then heat and stir evenly with steam to obtain a first organic solid-liquid mixture. Among them, in the first organic solid-liquid mixture, the mass of the second organic powder is 3% of the mass of the second organic solid-liquid mixture.

[0070] S4. Use the dry-wet separation device 3 to perform dry-wet separation on the first organic solid-liquid mixture to obtain a second organic powder and a first separated hot aqueous solution.

[0071] S5. Use the stirring pyrolysis device 2 to mix the second organic powder with water, then heat and stir evenly with steam to obtain a second organic solid-liquid mixture. Among them, in the second organic solid-liquid mixture, the mass of the second organic powder is 3% of the mass of the second organic solid-liquid mixture.

[0072] S6. Use the dry-wet separation device 3 to perform dry-wet separation on the second organic solid-liquid mixture to obtain a third organic powder and a second separated hot aqueous solution.

[0073] S7. Use the stirring pyrolysis device 2 to mix the third organic powder with water, then heat and stir evenly with steam to obtain a third organic solid-liquid mixture. Among them, in the third organic solid-liquid mixture, the mass of the third organic powder is 3% of the mass of the third organic solid-liquid mixture.

[0074] S8. Use the dry-wet separation device 3 to perform dry-wet separation on the third organic solid-liquid mixture to obtain a fourth organic powder and a third separated hot aqueous solution.

[0075] S9. Use the heat preservation water tank 4 to store the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution, and heat the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution; wherein, the heat preservation water tank 4 also uses secondary steam to heat the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution; wherein, the secondary steam is the remaining steam obtained after the stirring pyrolysis device 2 sterilizes the first organic powder by steam, the remaining steam after the stirring pyrolysis device 2 heats the second organic powder and water, the remaining steam after the stirring pyrolysis device 2 heats the second organic powder and water, and the remaining steam after the stirring pyrolysis device 2 heats the third organic powder and water.

[0076] S10. Use the plate heat exchanger 5 to perform heat conversion on the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution in the heat preservation water tank 4, and use the converted heat to heat cold water to obtain hot water.

[0077] S11. Use the sewage treatment equipment 7 to purify the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution after heat exchange by the plate heat exchanger 5 to obtain purified water.

[0078] S12. Use the organic fertilizer raw material collection box 8 to store the fourth organic powder.

[0079] Wherein, the fourth organic powder is the raw material for making organic fertilizer; the plate heat exchanger 5 uses the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution in the heat preservation water tank 4 to perform heat conversion, and uses the converted heat to heat cold water to obtain hot water; the steam equipment 6 provides steam for the stirring pyrolysis device 2; the steam provided by the steam equipment 6 to the stirring pyrolysis device 2 is generated by using the hot water obtained by the plate heat exchanger 5.

[0080] In the embodiment of the present invention, the steps S2 to S8 can be cycled multiple times as needed. After multiple dilutions, the salt content in the manure and kitchen waste is reduced, and finally the salt content in the manure and kitchen waste is removed, that is, the salt content in the manure and kitchen waste is so low that it will not affect the growth of crops and has no impact on the ecological environment.

[0081] In the embodiments of the present invention, using steam to sterilize powdery fecal sewage or food waste is beneficial to removing the germs in the fecal sewage and food waste; after heating the steam-heated powdery fecal sewage or food waste and diluting it with water three times to remove salt, the content of salt molecules in the fecal sewage or food waste can be effectively reduced, and organic fertilizer raw materials free of harmful germs and salts can be obtained. Therefore, after being processed by the technical solution of the present invention, the germs and salts in the fecal sewage or food waste can be effectively removed. The organic fertilizer produced from the organic raw materials desalted by high-temperature thermal decomposition is safe and non-toxic, beneficial to plant growth, and will not pollute the ecological environment such as soil and groundwater. It is beneficial that all fecal sewage and food waste no longer need to be incinerated or landfilled and can be all produced into organic fertilizer for recycling.

[0082] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the concept and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pyrolysis system for removing germs and salts from fecal sewage and food waste, characterized in that, It includes a crushing device (1), a stirring pyrolysis device (2), a dry-wet separation device (3), a heat preservation water tank (4), a plate heat exchanger (5), a steam device (6), a sewage treatment device (7), and an organic fertilizer raw material collection box (8); The crushing device (1) is connected to the stirring pyrolysis device (2). The stirring pyrolysis device (2) is connected to the dry-wet separation device (3) through a solid-liquid mixture pipeline and a solid material pipeline. The stirring pyrolysis device (2) is connected to the heat preservation water tank (4) through a secondary steam pipeline. The dry-wet separation device (3) is connected to the heat preservation water tank (4) through a solution pipeline. The dry-wet separation device (3) is connected to the organic fertilizer raw material collection box (8) through a pipeline; The heat preservation water tank (4) is connected to the plate heat exchanger (5) through a pipeline. The plate heat exchanger (5) is connected to the steam device (6) through a hot water pipeline. Both the plate heat exchanger (5) and the steam device (6) are connected with cold water pipelines. The sewage treatment device (7) is connected to the plate heat exchanger (5) through a pipeline. The sewage treatment device (7) is connected to the organic fertilizer raw material collection box (8) through an organic sludge pipeline. The stirring pyrolysis device (2) is connected to the steam device (6) through a steam pipeline; The crushing device (1) provides the first organic matter powder to the stirring pyrolysis device (2) through a pipeline. The stirring pyrolysis device (2) provides secondary steam to the heat preservation water tank (4) through the secondary steam pipeline. The dry-wet separation device (3) provides solid materials to the stirring pyrolysis device (2) through the solid material pipeline.

2. The pyrolysis system for removing germs and salts from fecal sewage and food waste according to claim 1, wherein In the stirring pyrolysis device (2), the temperature of the steam used for steam high-temperature pyrolysis sterilization of the first organic matter powder is 130°C to 200°C, and the pressure of the steam used for sterilization is 0.25 MPa to 1.6 MPa.

3. The pyrolysis system for removing germs and salts from fecal sewage and food waste according to claim 2, wherein The time for steam high-temperature pyrolysis sterilization of the first organic matter powder in the stirring pyrolysis device (2) lasts at least 20 minutes.

4. The pyrolysis system for removing germs and salts from fecal sewage and food waste according to any one of claims 1 to 3, characterized in that, The particle size of the first organic matter powder is 3 mm to 5 mm.

5. A pyrolysis method for removing germs and salts from manure and food waste, characterized in that, Applied to the pyrolysis system for removing germs and salts from fecal sewage and kitchen waste as described in any one of claims 1 to 3, it includes the following steps: Using the crushing device (1) to crush human fecal sewage and / or kitchen waste to obtain the first organic matter powder; Using the stirring pyrolysis device (2) to stir the first organic matter powder and perform steam high-temperature pyrolysis sterilization during the stirring process to obtain the second organic matter powder; Using the stirring pyrolysis device (2) to mix and stir the second organic matter powder with water evenly and heat it with steam during the stirring process to obtain the first organic solid-liquid mixture; wherein, the mass of the first organic matter powder in the first organic solid-liquid mixture is 3% of the mass of the first organic solid-liquid mixture; Using the dry-wet separation device (3) to perform dry-wet separation on the first organic solid-liquid mixture to obtain the third organic matter powder and the first separated hot aqueous solution; Use the stirring pyrolysis device (2) to mix and stir the third organic powder and water evenly, and heat with steam during the stirring process to obtain a second organic solid-liquid mixture; wherein, in the second organic solid-liquid mixture, the mass of the third organic powder is 3% of the mass of the second organic solid-liquid mixture; Use the dry-wet separation device (3) to perform dry-wet separation on the second organic solid-liquid mixture to obtain a fourth organic powder and a second separated hot aqueous solution; Use the stirring pyrolysis device (2) to mix and stir the third organic powder and water evenly, and heat with steam during the stirring process to obtain a third organic solid-liquid mixture; wherein, in the third organic solid-liquid mixture, the mass of the fourth organic powder is 3% of the mass of the third organic solid-liquid mixture; Use the dry-wet separation device (3) to perform dry-wet separation on the third organic solid-liquid mixture to obtain a fifth organic powder and a third separated hot aqueous solution; Use the heat preservation water tank (4) to store the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution; Use the plate heat exchanger (5) to perform heat conversion on the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution in the heat preservation water tank (4), and use the converted heat to heat cold water to obtain hot water; Use the sewage treatment equipment (7) to purify the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution after heat conversion by the plate heat exchanger (5) to obtain purified water; Use the organic fertilizer raw material collection box (8) to store the fifth organic powder; Among them, the fourth organic powder is a raw material for making organic fertilizer; the steam equipment (6) provides steam for the stirring pyrolysis device (2); the steam provided by the steam equipment (6) to the stirring pyrolysis device (2) is generated by the steam equipment (6) heating cold water and the hot water; The heat preservation water tank (4) also uses secondary steam to heat the first separated hot aqueous solution, the second separated hot aqueous solution, and the third separated hot aqueous solution; wherein, the secondary steam is the remaining steam obtained after the stirring pyrolysis device (2) steam-sterilizes the first organic powder, the remaining steam after the stirring pyrolysis device (2) heats the second organic powder and water, the remaining steam after the stirring pyrolysis device (2) heats the third organic powder and water, and the remaining steam after the stirring pyrolysis device (2) heats the fourth organic powder and water; in the stirring pyrolysis device (2), the temperature of the steam for steam high-temperature pyrolysis sterilization of the first organic powder is 130°C to 200°C, and the pressure of the steam used for sterilization is 0.25 MPa to 1.6 MPa.

6. The pyrolysis method for removing germs and salts from fecal sewage and kitchen waste according to claim 5, characterized in that, The time for steam high-temperature pyrolysis sterilization of the first organic powder in the stirring pyrolysis device (2) lasts at least 20 minutes.

7. The pyrolysis method for removing germs and salts from fecal sewage and food waste according to any one of claims 5 to 6, characterized in that, The particle size of the first organic powder is 3 mm to 5 mm.

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