System for preparing methane from organic waste

Abstract

A system for preparing methane from organic waste, the system comprising a crushing workshop (1), a premixing and stirring tank (2), a separation workshop (3), a nitrification tank (4), a rapid sedimentation tank (5), a biological wall-breaking tank (6), a biogas digester (7), a gas storage cabinet (8), a gas purification workshop (9), and a power generation workshop (10). Organic waste is crushed in the crushing workshop (1) and then has reused wastewater added thereto to form a liquefied state, the liquefied organic waste is transported to the premixing and stirring tank (2) for stirring, then the stirred organic waste is pumped into the separation workshop (3) to separate inorganic products, the separated organic products enter the nitrification tank (4), remain for a certain period of time in the nitrification tank (4) and then enter the rapid sedimentation tank (5) for concentration, the concentrated organic products are pumped into the biological wall-breaking tank (6), the organic products subjected to wall breaking enter the biogas digester (7) to be subjected to anaerobic fermentation to generate biogas, the generated biogas flows through the gas storage cabinet (8) and enters the gas purification workshop (9), the purified biogas enters the power generation workshop (10), and generated electric energy is merged into a power grid after passing through a transformer substation. By means of the system, a variety of organic waste is turned into methane under the action of nitrifying bacteria and methane bacteria.

Description

A system for producing methane from organic waste Technical Field

[0001] The present invention relates to the field of environmental protection technology, and more particularly to a system for producing methane from organic waste. Background Art

[0002] Industrial and personal activities generate a vast amount of organic waste, including activated sludge from sewage treatment plants, fruit and vegetable waste, green stems and leaves, animal feces, kitchen waste, and dead livestock and poultry. These organic wastes may contain harmful substances such as bacteria, viruses, and heavy metals. Improper handling can lead to the discharge of pollutants such as wastewater and exhaust gases, polluting the air, water, and soil, and impacting the ecological environment and human health. On the other hand, organic waste is rich in organic matter and nutrients, and if properly utilized, can become a renewable resource.

[0003] my country's technology for recycling and treating organic waste is still underdeveloped. The main methods for treating organic waste are incineration and landfill, both of which cause serious environmental pollution and harm. Incineration produces a large amount of waste gas, including hazardous substances such as sulfur dioxide and dioxins, posing a threat to air quality and human health. Landfill not only occupies a large amount of land resources but also produces hazardous substances such as leachate, polluting groundwater and soil. Furthermore, neither incineration nor landfill fully utilizes the intrinsic value of organic waste. Incineration generates a large amount of waste heat, while landfill simply buries the organic waste in the ground, generating a large amount of foul-smelling waste gases such as hydrogen sulfide, skatole (indole), methyl mercaptan, trimethylamine, and dimethyl disulfide. These methods fail to effectively utilize the organic matter and nutrients in the waste. Summary of the Invention

[0004] To overcome the shortcomings of existing organic waste treatment technologies, which can cause environmental and human harm and fail to fully utilize the intrinsic value of organic waste, the present invention provides a system for producing methane from organic waste. This system utilizes various organic wastes, liquefying them while simultaneously training and converting them through the activity of nitrifying and methanogenic bacteria, transforming them into methane, which is beneficial to humans. Leveraging methane's efficient combustion properties, an internal combustion generator set is installed to generate large amounts of electricity, transforming it into a clean energy source that benefits both the nation and the people. This fully utilizes the inherent properties of organic waste, transforming waste into valuable resources, creating a green and environmentally friendly environment, and contributing to environmental protection and the development of a circular product chain.

[0005] The technical solution of the present invention is as follows:

[0006] A system for producing methane from organic waste includes a crushing workshop, a premixing tank, a separation workshop, a nitrification tank, a rapid sedimentation tank, a biological wall breaking tank, a biogas tank, a gas storage cabinet, a gas purification workshop and a power generation workshop.

[0007] After the organic waste is crushed in the crushing workshop, it is added with recycled sewage to form a liquefied state. The liquefied organic waste is transported to the premixing tank for mixing, and then pumped into the separation workshop to separate the inorganic products. The separated organic products enter the nitrification tank. After staying in the nitrification tank for a certain period of time, the organic products enter the rapid sedimentation tank for concentration. The concentrated organic products are pumped into the biological wall-breaking tank. After the wall is broken, the organic products enter the biogas tank for anaerobic fermentation to produce biogas. The generated biogas enters the gas purification workshop through the gas storage cabinet. The purified biogas enters the power generation workshop, and the generated electricity is connected to the power grid after passing through the substation.

[0008] The collected organic waste primarily consists of large amounts of household waste, including solids such as fruit and vegetable waste, green stems and leaves, and animal manure, and a slurry such as activated sludge. The activated sludge (slurry portion) enters the premixing tank directly, while the collected organic waste (solids) is pre-ground in a pulverizer with a mesh size of 300 or larger and then dumped into the premixing tank via dump trucks. The premixing tank is equipped with high-speed, medium-speed, and low-speed mixers. Recycled sewage is added to the front end of the premixing tank to liquefy the organic waste. Three mixers with different speeds gradually mix the organic waste until it is evenly mixed. After uniform mixing, the organic waste is pumped into the separation tank, where specialized separation equipment (such as an in-feed rolling separator) separates the inorganic products and discharges them. The liquefied organic products enter the nitrification tank, which is equipped with a downward-feeding aeration system to train nitrifying bacteria. The organic products remain in the nitrification tank for a period of time, undergoing treatment by the nitrifying bacteria before entering the rapid sedimentation tank. The rapid sedimentation tank physically concentrates the organic products after nitrification. The supernatant is recycled to the front end of the premixing tank for liquefaction of subsequent organic waste. The concentrated organic products are pumped into a high-pressure biological wall-breaking tank. The biological wall-breaking tank is equipped with gas pressurization and ultrasonic equipment. After high-pressure ultrasonic wall-breaking, the organic products enter the biogas tank through an automatic valve. An appropriate amount of methane bacteria is added to the biogas tank according to relevant parameters. The organic products undergo anaerobic fermentation to produce biogas. The generated biogas enters the gas purification workshop through a gas storage cabinet. The purified biogas enters the internal combustion generator set in the power generation workshop through a pressurization system. The generated electricity is transformed by the substation and then connected to the power grid.

[0009] The above-mentioned system for producing methane from organic waste has a nitrification tank with an anoxic tank at the front end and an aerobic tank at the rear end. A plug flow mixer is installed in the anoxic tank, a downward aeration device is installed in the aerobic tank, and a return pipe is installed in the nitrification tank, so that part of the mixed liquid at the tail end of the aerobic tank flows back to the starting end of the anaerobic tank through the return pipe.

[0010] The above-mentioned system for producing methane from organic waste is provided with a rapid sedimentation tank having a mixer and a vertical flow sedimentation tank. The mixer includes a high-speed mixer, a medium-speed mixer and a low-speed mixer. The mixer destroys the surface tension of the organic product after nitration, and the nitrated mixed liquid containing the organic product flows into the vertical flow sedimentation tank. The water is evenly distributed in the vertical flow sedimentation tank, so that the organic product sinks rapidly in the sedimentation area and the water flow rises rapidly.

[0011] Furthermore, the supernatant in the sedimentation zone is returned to the premixing tank through the sedimentation tank pressure reflux pipe to mix with the crushed organic waste, and the organic products and bacterial flora at the bottom of the sedimentation zone enter the biological wall-breaking tank through the pressure pipe.

[0012] The above-mentioned system for producing methane from organic waste has a closed biological wall breaking tank. When feeding, the pressure reducing valve and the feed valve are opened, and the organic product is fed into the wall breaking tank through the feed valve by a pressurized pump. After the feeding is completed, the feed valve is closed, the pressure reducing valve is automatically closed, and the air intake valve is opened to inject medium and high pressure gas into the tank. When the internal pressure of the biological wall breaking tank reaches the set pressure, the ultrasonic equipment is started. After a period of time, the discharge valve is opened, and the organic product in the biological wall breaking tank is discharged into the biogas tank through the discharge valve under the pressure of the medium and high pressure gas.

[0013] Furthermore, a temporary storage chamber is set between the rapid sedimentation tank and the biological wall breaking tank, the bottom feed port of the temporary storage chamber is connected to the bottom of the rapid sedimentation tank, the temporary storage chamber is a vertical structure, and a feed valve is set at the bottom of the temporary storage chamber.

[0014] In the above-mentioned system for producing methane from organic waste, an annular distribution pipe is arranged in the biogas tank, and the annular distribution pipe is a certain distance away from the bottom of the biogas tank. The organic products after wall breaking flow evenly and continuously into the bottom of the biogas tank through the annular distribution pipe.

[0015] The above-mentioned system for producing methane from organic waste has a slag discharge device and a heating coil arranged at the lower part of the biogas tank, and the slag discharge device is connected to the front end of the nitrification tank through a gravity pipe. A decanting device and a biogas chamber are arranged at the upper part of the biogas tank, and the decanting device is connected to the front end of the premixing and stirring tank. The supernatant in the biogas tank flows into the front end of the premixing and stirring tank through the gravity pipe to mix with the crushed organic waste. The biogas chamber is connected to the gas storage cabinet through a biogas pipeline, and the biogas flows into the gas storage cabinet through the biogas pipeline.

[0016] In the above-mentioned system for producing methane from organic waste, the gas storage cabinets are arranged in parallel, and the biogas tank is connected to the gas storage cabinet via a biogas pipe. The biogas produced by the biogas tank enters multiple groups of parallel gas storage cabinets. Condensate drainage equipment is set at the bottom of each group of gas storage cabinets. After the water vapor carried by the biogas is condensed by the condensate drainage equipment, the condensate water level is measured according to the ultrasonic interface meter in the gas storage cabinet, and the condensate is discharged to the front end of the premixing tank through a gravity pipe or a pressure pipe.

[0017] In the above-mentioned system for producing methane from organic waste, the biogas produced in the biogas tank enters the gas purification workshop through the biogas pipe. After desulfurization and denitrification, the biogas directly enters the internal combustion generator set in the power generation workshop. The sewage produced after desulfurization and denitrification flows back to the front end of the premixing tank through the sewage return pipe to be mixed with the crushed organic waste.

[0018] In the above-mentioned system for producing methane from organic waste, the nitrifying bacteria in the nitrification tank nitrify and separate the organic products. After a period of time, the nitrifying bacteria and the organic products enter the biological wall-breaking tank together, causing the nitrifying enzyme in the nitrifying bacteria to overflow out of the cells. The nitrifying bacteria, nitrifying enzyme and organic products enter the biogas tank together. The biogas tank has methanogens built in it, which decompose the intracellular fluid and organic products of the nitrifying bacteria to synthesize methane.

[0019] The present invention according to the above scheme has the following beneficial effects:

[0020] 1. The materials in the three system units of nitrification tank, high-pressure wall breaking tank and biogas tank can be recycled repeatedly. At the same time, the organic products circulate in these three system units, which can effectively reduce waste residues and waste liquids, realize the resource utilization and reduction of organic waste, thereby improving the efficiency of nitrification, wall breaking and gas production of organic products, so that all organic products can be converted into biogas, fully utilizing the effective conversion capacity of nitrifying bacteria and methanogens, thereby improving the utilization value of organic waste.

[0021] 2. This system does not discharge any sewage during the entire biogas production process, achieving green and environmental protection, which is beneficial to the protection of the ecological environment and also reduces the cost of sewage treatment.

[0022] 3. This system avoids environmental pollution caused by organic waste. By converting organic waste into methane, it achieves waste utilization and clean energy production, avoiding the environmental pollution problems caused by traditional treatment methods such as incineration or landfill. By converting organic waste into methane and using it for power generation, it achieves energy conversion and utilization. The internal combustion generator set in the system can fully combust methane to generate electricity, which can be connected to the grid or directly supplied to users, reducing energy costs and reducing dependence on external energy sources.

[0023] 4. This system can realize automatic control and unattended operation, reducing labor costs. At the same time, the system operation is highly sustainable. By recycling organic waste and intermediate products, including the use of special strains, sustainable utilization of resources and sustainable development of energy are achieved.

[0024] 5. This system improves the effective conversion of nitrifying bacteria into methanogens. The liquefied organic products are sent to the nitrification tank. By adding oxygen and nitrifying bacteria, an oxidation reaction occurs, decomposing the organic matter into ammonia, nitrogen and nitrate, and generating a large number of nitrifying bacteria. The nitrified organic products are sent to the high-pressure biological wall-breaking tank. Through the action of pressure and ultrasound, the cell walls of the organic products and nitrifying bacteria are broken, releasing the dissolved organic matter therein, providing more food sources for methanogens, promoting the fermentation of organic products by methanogens in an anaerobic environment, and improving the quality and quantity of biogas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] FIG1 is a schematic structural diagram of the present invention.

[0027] FIG2 is a partial enlarged view of FIG1 .

[0028] FIG3 is a partial enlarged view of FIG1 .

[0029] Among them, the reference numerals in the figures are:

[0030] 1. Crushing workshop; 2. Premixing tank; 3. Separation workshop; 4. Nitrification tank; 5. Rapid sedimentation tank; 51. Temporary storage room; 6. Biological wall breaking tank; 7. Biogas tank; 8. Gas storage cabinet; 9. Gas purification workshop; 10. Power generation workshop; 11. Sewage return pipe; 12. Organic material pipe; 13. Biogas residue pipe; 14. Biogas pipe; 15. Nitration mixed liquid pipe. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] A system for producing methane from organic waste, as shown in Figures 1, 2, and 3, comprises a crushing workshop 1, a premixing tank 2, a separation workshop 3, a nitrification tank 4, a rapid sedimentation tank 5, a biological wall-breaking tank 6, a biogas tank 7, a gas storage cabinet 8, a gas purification workshop 9, and a power generation workshop 10. Organic waste is crushed in the crushing workshop 1 and then added to return sewage to form a liquefied state. The liquefied organic waste is transported to the premixing tank 2 for mixing, then pumped into the separation workshop 3 to separate inorganic products. The separated organic products enter the nitrification tank 4. After a certain period of residence in the nitrification tank 4, the organic products enter the rapid sedimentation tank 5 for concentration. The concentrated organic products are pumped into the biological wall-breaking tank 6. After wall-breaking, the organic products enter the biogas tank 7 for anaerobic fermentation to produce biogas. The generated biogas enters the gas purification workshop 9 through the gas storage cabinet 8. The purified biogas enters the power generation workshop 10, and the generated electricity is fed into the power grid through a substation.

[0033] The collected organic waste is mainly a large amount of domestic waste, such as fruit and vegetable waste, green stems and leaves, animal feces in the solid part, and activated sludge in the slurry part. The activated sludge (slurry part) directly enters the premixing tank 2, and the collected organic waste (solid part) is pre-crushed in the crushing workshop 1 with a crusher with a mesh size of more than 300, and poured into the premixing tank 2 by a dump truck.

[0034] A high-speed mixer, a medium-speed mixer and a low-speed mixer are set in the premixing tank 2. Return sewage is added to the front end of the premixing tank 2 to mix the organic waste into a liquefied state. The organic waste is gradually mixed evenly using three mixers with different speeds.

[0035] After being stirred evenly, the organic waste is pumped to the organic material pipe 12 and enters the separation workshop 3 through the organic material pipe 12. The inorganic products are separated and discharged through the special separation equipment (such as the internal feeding rolling separator) in the separation workshop 3, and the liquefied organic products enter the nitrification tank 4 through the organic material pipe 12.

[0036] Nitrification tank 4 is equipped with downward-extending aeration equipment, utilizing the aeration system to train nitrifying bacteria. Organic products remain in nitrification tank 4 for a certain period of time before entering rapid sedimentation tank 5 through organic material pipe 12 after being processed by nitrifying bacteria. Nitrification tank 4 is equipped with an anoxic tank at the front and an aerobic tank at the rear. The anoxic tank is equipped with a plug-flow mixer, and the aerobic tank is equipped with downward-extending aeration equipment. Nitrification tank 4 is also equipped with a nitrification mixed liquid pipe 15, which allows a portion of the mixed liquid at the rear end of the aerobic tank to flow back to the starting end of the anaerobic tank through the nitrification mixed liquid pipe 15.

[0037] The nitrifying bacteria in the nitrification tank 4 nitrify and separate the organic products. After a period of time, the nitrifying bacteria and the organic products enter the biological wall-breaking tank 6 together, causing the nitrifying enzyme in the nitrifying bacteria to overflow out of the cells. The nitrifying bacteria, nitrifying enzyme and organic products enter the biogas tank 7 together. The biogas tank 7 has methanogens built in it. The methanogens decompose the intracellular fluid of the nitrifying bacteria and the organic products to synthesize methane.

[0038] The rapid sedimentation tank 5 uses a physical method to concentrate the organic products after nitrification, wherein the supernatant is recycled to the front end of the premixing and stirring tank 2 for liquefaction of subsequent organic waste, and the concentrated organic products are pumped into the high-pressure biological wall-breaking tank 6. The rapid sedimentation tank 5 is provided with a mixer and a vertical flow sedimentation tank. The mixer includes a high-speed mixer, a medium-speed mixer and a low-speed mixer. The mixer destroys the surface tension of the organic products after nitrification, and the nitrated mixed liquid containing the organic products flows into the vertical flow sedimentation tank. The vertical flow sedimentation tank is evenly distributed with water, so that the organic products sink quickly in the sedimentation area and the water flow rises quickly. The supernatant in the sedimentation area is returned to the front of the premixing and stirring tank 2 through the sewage return pipe 11 driven by the sedimentation tank pressure to mix with the crushed organic waste. The organic products and the bacterial community at the bottom of the sedimentation area enter the biological wall-breaking tank 6 through the pressure pipe.

[0039] A temporary storage chamber 51 is located between the rapid sedimentation tank 5 and the biological cell wall breaking tank 6. While the biological cell wall breaking tank 6 is undergoing high-pressure ultrasonic cell wall breaking, the organic products from the rapid sedimentation tank 5 are temporarily stored in the temporary storage chamber 51. The rapid sedimentation tank 5 is connected to the temporary storage chamber 51 via an organic feed pipe 12, which in turn is connected to the biological cell wall breaking tank 6 via an organic feed pipe 12. The bottom feed port of the temporary storage chamber 51 is connected to the bottom of the rapid sedimentation tank 5. The temporary storage chamber 51 is a vertical structure, and a feed valve is located at the bottom of the temporary storage chamber 51.

[0040] The bio-cell-breaking tank 6 is equipped with a gas pressurizing device and an ultrasonic device. After the organic products undergo high-pressure ultrasonic cell-breaking, they enter the biogas tank 7 through an automatic valve. The bio-cell-breaking tank 6 is a closed structure. During feeding, the pressure reducing valve and the feed valve are opened, and the organic products are pumped through the feed valve by a pressurized pump and fed into the cell-breaking tank. After feeding is completed, the feed valve closes, the pressure reducing valve automatically closes, and the air inlet valve opens to inject medium- and high-pressure gas into the bio-cell-breaking tank 6. When the internal pressure of the bio-cell-breaking tank 6 reaches the set pressure, the ultrasonic device is activated. After a period of time, the discharge valve opens, and the organic products in the bio-cell-breaking tank 6 are discharged into the biogas tank 7 through the discharge valve and organic material pipe 12 under the pressure of the medium- and high-pressure gas.

[0041] An appropriate amount of methane bacteria is put into the biogas pool 7 according to relevant parameters, and the organic products are anaerobic fermented to produce biogas. The produced biogas enters the gas purification workshop 9 through the gas storage cabinet 8. The purified biogas enters the internal combustion generator set in the power generation workshop 10 through the pressurization system. The generated electricity is transformed by the substation and then integrated into the power grid.

[0042] An annular distribution pipe is installed within the biogas tank 7, located at a certain distance from the bottom of the tank 7. The organic products after wall destruction flow evenly and continuously to the bottom of the tank 7 through the annular distribution pipe. A slag discharge device and a heating coil are installed at the lower part of the biogas tank 7. The slag discharge device is connected to the front end of the nitrification tank 4 via a gravity-driven biogas residue pipe 13. A decanting device and a biogas chamber are installed at the upper part of the biogas tank 7. The decanting device is connected to the front end of the premixing tank 2. The supernatant in the biogas tank 7 flows into the front end of the premixing tank 2 via a gravity-driven sewage return pipe 11 to mix with the pulverized organic waste. The biogas chamber is connected to the gas storage tank 8 via a biogas pipe 14, and biogas flows into the gas storage tank 8 through the biogas pipe 14.

[0043] The gas storage cabinets 8 are arranged in parallel, and the biogas tank 7 is connected to the gas storage cabinet 8 via a biogas pipe 14. The biogas generated by the biogas tank 7 enters multiple groups of parallel gas storage cabinets 8. Condensate drainage equipment is set at the bottom of each group of gas storage cabinets 8. After the water vapor carried by the biogas is condensed by the condensate drainage equipment, the condensate water level is measured according to the acoustic interface meter in the gas storage cabinet 8, and the condensate gravity or pressure-driven sewage return pipe 11 is discharged to the front end of the premixing tank 2.

[0044] The biogas generated by the biogas tank 7 enters the interior of the gas purification workshop 9 through the biogas pipe 14. After desulfurization and denitrification, the biogas directly enters the internal combustion generator set of the power generation workshop 10 through the biogas pipe 14. The sewage generated after desulfurization and denitrification flows back to the front end of the premixing tank 2 through the sewage return pipe 11 to be mixed with the crushed organic waste.

[0045] 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 and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A system for producing methane from organic waste, characterized in that: It includes a crushing workshop, a premixing tank, a separation workshop, a nitrification tank, a rapid sedimentation tank, a biological wall-breaking tank, a biogas tank, a gas storage cabinet, a gas purification workshop and a power generation workshop. After the organic waste is crushed in the crushing workshop, it is added with recycled sewage to form a liquefied state. The liquefied organic waste is transported to the premixing tank for mixing, and then pumped into the separation workshop to separate the inorganic products. The separated organic products enter the nitrification tank. After staying in the nitrification tank for a certain period of time, the organic products enter the rapid sedimentation tank for concentration. The concentrated organic products are pumped into the biological wall breaking tank. The organic products after wall breaking enter the biogas tank for anaerobic fermentation to produce biogas. The generated biogas enters the gas purification workshop through the gas storage cabinet. The purified biogas enters the power generation workshop, and the generated electricity is connected to the power grid after passing through the substation.

2. A system for producing methane from organic waste according to claim 1, characterized in that: The nitrification tank is provided with an anoxic tank at the front end and an aerobic tank at the rear end. A plug flow mixer is provided in the anoxic tank, a downward aeration equipment is provided in the aerobic tank, and a reflux pipe is provided in the nitrification tank so that part of the mixed liquid at the tail end of the aerobic tank can flow back to the starting end of the anaerobic tank through the reflux pipe.

3. A system for producing methane from organic waste according to claim 1, characterized in that: The rapid sedimentation tank is provided with a mixer and a vertical flow sedimentation tank. The mixer includes a high-speed mixer, a medium-speed mixer and a low-speed mixer. The mixer destroys the surface tension of the organic products after nitrification. The nitrated mixed liquid containing the organic products flows into the vertical flow sedimentation tank. The water is evenly distributed in the vertical flow sedimentation tank, so that the organic products sink quickly in the sedimentation area and the water flow rises quickly.

4. A system for producing methane from organic waste according to claim 1, characterized in that: The biogas produced in the biogas digester enters the gas purification workshop through the biogas pipe. After desulfurization and denitrification, the biogas directly enters the internal combustion generator set in the power generation workshop. The sewage generated after desulfurization and denitrification flows back to the front end of the premixing tank through the sewage return pipe to mix with the crushed organic waste.

5. The system for producing methane from organic waste according to claim 1, characterized in that: The biological wall breaking tank is a closed structure. When feeding, the pressure reducing valve and the feed valve are opened, and the organic product is sent to the wall breaking tank through the feed valve by a pressurized pump. After the feeding is completed, the feed valve is closed, the pressure reducing valve is automatically closed, and the air intake valve is opened to inject medium and high pressure gas into it. When the internal pressure of the biological wall breaking tank reaches the set pressure, the ultrasonic equipment is started. After some time, the discharge valve is opened, and the organic products in the biological wall breaking tank are discharged into the biogas tank through the discharge valve under the pressure of medium and high pressure gas.

6. A system for producing methane from organic waste according to claim 5, characterized in that: A temporary storage chamber is arranged between the rapid sedimentation tank and the biological wall-breaking tank. The bottom feed port of the temporary storage chamber is connected to the bottom of the rapid sedimentation tank. The temporary storage chamber is a vertical structure, and a feed valve is arranged at the bottom of the temporary storage chamber.

7. The system for producing methane from organic waste according to claim 1, characterized in that: An annular distribution pipe is arranged in the biogas tank, and the annular distribution pipe is a certain distance away from the bottom of the biogas tank. The organic products after wall breaking flow into the bottom of the biogas tank evenly and continuously through the annular distribution pipe.

8. The system for producing methane from organic waste according to claim 1, characterized in that: A slag discharge device and a heating coil are arranged at the lower part of the biogas tank, and the slag discharge device is connected to the front end of the nitrification tank through a gravity pipe. A decanting device and a biogas chamber are arranged at the upper part of the biogas tank, and the decanting device is connected to the front end of the premixing and stirring tank. The supernatant in the biogas tank flows into the front end of the premixing and stirring tank through the gravity pipe to be mixed with the crushed organic waste. The biogas chamber is connected to the gas storage cabinet through a biogas pipeline, and the biogas flows into the gas storage cabinet through the biogas pipeline.

9. The system for producing methane from organic waste according to claim 1, characterized in that: The gas storage cabinets are arranged in parallel, and the biogas tank is connected to the gas storage cabinet via a biogas pipe. The biogas produced by the biogas tank enters into multiple groups of parallel gas storage cabinets. Condensate water drainage equipment is arranged at the bottom of each group of gas storage cabinets. The water vapor carried by the biogas is condensed by the condensate water drainage equipment, and the condensate water level is measured by the ultrasonic interface meter in the gas storage cabinet. The condensed water is then discharged to the front end of the premixing tank through a gravity pipe or a pressure pipe.

10. The system for producing methane from organic waste according to claim 1, characterized in that: The nitrifying bacteria in the nitrification pool nitrify and separate the organic products. After a period of time, the nitrifying bacteria and the organic products enter the biological wall-breaking pool together, causing the nitrifying enzyme in the nitrifying bacteria to overflow out of the cells. The nitrifying bacteria, nitrifying enzyme and organic products enter the biogas digester together. The biogas digester has methanogens built in it, which decompose the intracellular fluid and organic products of the nitrifying bacteria and synthesize methane.

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