A new energy biogas tank

Abstract

This utility model discloses a new energy biogas digester, comprising a biogas digester with a fixed top cover and a sloping bottom having a lowest point. A booster tank and a slag discharge tank are located next to the biogas digester. The biogas digester is connected to the slag discharge tank at its lowest point via a slag discharge pipe. A channel connects the bottom of the biogas digester to the booster tank. The biogas digester has a feed trough with a flue pipe at its bottom, extending downwards to the lower part of the biogas digester. The slag discharge tank has a biogas slurry circulation pipe connected to the upper part of the flue pipe. The digester walls are insulated, and an auxiliary heating device is installed inside the digester. A biogas transmission pipe with a pressure gauge is located at the top of the digester. The biogas digester is located inside a plastic greenhouse. This utility model combines high-efficiency gas production, convenient slag discharge, safe transportation, and energy-saving insulation functions, making it suitable for promotion and use in cold regions of northern and northeastern China.

Description

Technical Field

[0001] This application relates to the field of biogas digester technology, specifically to a new energy biogas digester. Background Technology

[0002] With the development of my country's economy and the progress of society, the living standards of urban residents have been further improved, but many problems still exist in the lives of rural residents. Developing ecological agricultural production methods in rural areas, improving the rural environment, and making comprehensive use of biogas digesters are important ways to change the rural environment. A biogas digester can be used for about 20 years. Making good use of biogas digesters can not only save energy, improve and protect the environment, but also save fertilizers and pesticides, increase the yield and quality of crops, and promote and drive the development of the animal husbandry industry, among many other benefits.

[0003] A biogas digester is a digester where organic matter is fermented and decomposed by biogas bacteria to produce biogas. Biogas is a mixture of gases, primarily composed of methane, followed by carbon dioxide, hydrogen sulfide, nitrogen, and other components; it is flammable. In rural areas, biogas produced by biogas digesters can be used to provide high-quality and inexpensive fuel for cooking, heating, etc. The biogas slurry produced can be used as pesticides, fertilizers, and animal feed, while the biogas residue can be used as fertilizer.

[0004] However, in Northeast China, due to its high latitude and low temperatures year-round, there are few days a year when the biogas digester can maintain a normal fermentation temperature. For most of the time, due to the low temperature, the biogas digester fermentation temperature is low, the fermentation speed is slow, and the amount of biogas produced is small, which is insufficient to provide a family with biogas. This leads to rural farmers having many complaints and resistance to biogas digesters, and the rural environment cannot be improved. Utility Model Content

[0005] In view of this, this application provides a new energy biogas digester that combines efficient gas production, convenient slag discharge, safe transportation and energy-saving insulation functions, and is suitable for promotion and use in cold regions of northern and northeastern China.

[0006] According to one aspect of this application, one embodiment provides a new energy biogas digester, including a biogas digester with a fixed top cover and an inclined bottom having a lowest point. A booster tank and a slag discharge tank are arranged next to the biogas digester. The biogas digester is connected to the slag discharge tank at its lowest point via a slag discharge pipe. A channel is provided between the bottom of the biogas digester and the booster tank, connecting the digester to the booster tank. The biogas digester is provided with a feed trough, and a flue pipe is provided at the bottom of the feed trough, extending downwards to the lower part of the biogas digester. The slag discharge tank is provided with a biogas slurry circulation pipe, which is connected to the upper part of the flue pipe. The walls of the biogas digester are provided with an insulation layer. An auxiliary heating device is provided inside the biogas digester. A biogas transmission pipe is provided at the top of the biogas digester, and a pressure gauge is installed on the biogas transmission pipe. The biogas digester is located inside a plastic greenhouse.

[0007] Furthermore, a gate valve is installed on the biogas slurry circulation pipe between the biogas digester and the slag discharge tank.

[0008] Furthermore, it also includes a biogas storage bag, which is placed next to the biogas digester. The biogas digester is connected to the biogas storage bag via a biogas transmission pipe, and a one-way valve is installed on the biogas transmission pipe.

[0009] Furthermore, the biogas digester or biogas storage bag is equipped with a biogas delivery device, including a biogas compression and filtration device, a check valve, a pressure gauge, a gas safety device, and a gas outlet pipeline. The biogas compression and filtration device includes a primary filter, a compressor, and a fine filter. The primary filter is connected to the red mud soft biogas storage bag pipeline, which is then connected to the compressor. The compressor pipeline is connected to the fine filter, and the fine filter pipeline is connected to the check valve. The check valve pipeline is connected to the gas outlet pipeline. Pressure gauges are installed on the compressor inlet and outlet pipelines. The compressor outlet pipeline is connected in parallel to the gas safety device, which includes a safety valve, a pressure relief pipe, and a rain cap. One end of the safety valve is connected to the compressor outlet pipeline, and the other end is connected to the pressure relief pipe. The pressure relief pipe leads out of the plastic greenhouse, and a rain cap is installed at the end outside the plastic greenhouse.

[0010] Furthermore, the pipelines or conduits of the biogas conveying device are made of PE pipes or stainless steel pipes, and the conduits are grounded at certain intervals.

[0011] Furthermore, the insulation layer can be laid using one or more of the following: perlite and perlite bricks, vermiculite and vermiculite bricks, foamed cement, rock wool and rock wool board, silicate insulation materials, ceramic insulation materials, aerogel felt, and polymer foam.

[0012] Furthermore, a solar photovoltaic power station is installed above the plastic greenhouse.

[0013] Furthermore, the auxiliary heating device includes an electric heating device and a medium pipeline. The electric heating device is installed next to the biogas digester, and the medium pipeline can be laid at the bottom and side wall of the biogas digester and connected to the heating device through a circulation pump. The electric heating device heats the medium, and the heated medium circulates in the medium pipeline through the circulation pump to heat the biogas digester and increase the ambient temperature of the biogas digester.

[0014] Furthermore, the medium pipeline is a floor heating pipe.

[0015] Furthermore, the inner and / or outer walls of the biogas digester, pressurization tank, and slag discharge tank are provided with geomembranes to prevent biogas slurry from leaking into the ground.

[0016] The beneficial effects of this utility model are as follows: 1. This utility model provides a new energy biogas digester suitable for the cold regions of Northeast China. By utilizing the heat preservation and heat retention effect of the plastic greenhouse and the power supply of the solar photovoltaic power station for the auxiliary heating device, the biogas digester can maintain a normal fermentation temperature, allowing it to be used normally year-round.

[0017] 2. This utility model provides a new energy biogas digester, which is connected to a slag discharge tank via a slag discharge pipe at the bottom. The slag discharge tank is connected to a flue pipe at the bottom of the feed trough via a biogas slurry circulation pipe, which enables the biogas slurry and biogas residue to automatically rise into the slag discharge tank after fermentation. After standing in the slag discharge tank, the biogas residue and biogas slurry are separated, and the biogas slurry is circulated again, thus achieving convenient discharge of biogas residue.

[0018] 3. This utility model provides a new energy biogas digester that achieves energy self-sufficiency and is energy-saving and environmentally friendly through a solar photovoltaic power station and plastic greenhouse insulation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a top view of Embodiment 1 of the present utility model; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 4 This is a top view of Embodiment 2 of the present invention.

[0020] In the diagram: 1. Biogas digester; 2. Slag discharge tank; 3. Slag discharge pipe; 4. Booster tank; 5. Channel; 6. Feed trough; 7. Flue pipe; 8. Biogas slurry circulation pipe; 9. Gate valve; 10. Biogas transmission pipe; 11. Plastic greenhouse; 12. Biogas storage bag; 13. Solar photovoltaic power station. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0022] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0023] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections.

[0024] Example 1: This embodiment is a basic biogas digester.

[0025] like Figure 1 and Figure 2 As shown, according to one aspect of this application, one embodiment provides a new energy biogas digester, including a plastic greenhouse 11. Due to the cold climate in Northeast China, the plastic greenhouse 11 is usually covered with two or three layers of plastic film to increase the heat preservation effect of the plastic greenhouse 11.

[0026] Inside the plastic greenhouse 11, a biogas digester 1 is excavated and constructed. The biogas digester 1 can be built using a brick-concrete structure or a concrete structure. The walls of the biogas digester 1 include an insulation layer, which is made of insulating perlite and lightweight insulating bricks. To prevent biogas slurry leakage, both the inner and outer walls of the biogas digester 1 are lined with a geomembrane to prevent seepage. The biogas digester 1 has a fixed top cover, typically a dome, to facilitate biogas collection. The bottom of the biogas digester 1 is sloped, with a lowest point. The slope angle is typically between 3-10°, preferably 6-8°, allowing for rapid slag removal.

[0027] A booster tank 4 and a slag discharge tank 2 are built next to the biogas digester 1. The biogas digester 1 is connected to the slag discharge tank 2 at its lowest point through a slag discharge pipe 3. The slag discharge pipe 3 can be bricked or made of pre-formed pipes, such as ceramic pipes or PVC pipes. For example, PVC pipes with a diameter of 310mm are usually used to allow the relatively viscous biogas residue and biogas slurry mixture to enter the slag discharge tank 2. A channel 5 is provided between the bottom of the biogas digester 1 and the booster tank 4, connecting the two channels. The channel 5 is also bricked. The biogas digester 1 is provided with a feed trough 6, and a flue pipe 7 is provided at the bottom of the feed trough 6. The flue pipe 7 leads downward to the lower part of the biogas digester 1. Both the feed trough 6 and the flue pipe 7 are bricked. Since the booster tank 4, slag discharge tank 2 and feed trough 6 do not require fermentation, the tank walls of the booster tank 4, slag discharge tank 2 and feed trough 6 do not need to have an insulation layer. However, in order to prevent the biogas slurry from seeping into the soil, a geomembrane needs to be installed on the inner or outer wall.

[0028] Covers may be installed above the pressurization tank 4, slag discharge tank 2, and feed trough 6 to prevent people and animals from accidentally entering the tanks.

[0029] The booster tank 4 is connected to the biogas digester 1. During gas production, the biogas produced by microbial fermentation rises to the gas storage chamber. Because the biogas digester 1 is sealed and leak-proof, the biogas continuously accumulates, generating pressure. When the biogas pressure exceeds atmospheric pressure, it forces the material in the biogas digester 1 out, causing the water level in the booster tank 4 to rise and the water pressure in the biogas digester to drop, creating a water level difference. This water pressure difference maintains a certain pressure for the biogas in the biogas digester 1. According to actual measurements, the maximum biogas pressure in the biogas digester 1 can reach 14 MPa. The slag discharge tank 2 is equipped with a biogas slurry circulation pipe 8, which is connected to the upper part of the flue pipe 7. The biogas slurry circulation pipe 8 is made of PVC pipe. Since the biogas slurry and biogas residue have been settled in the slag discharge tank 2, the biogas residue content in the biogas slurry is relatively low. Therefore, a PVC pipe with a diameter of 100mm or 120mm is sufficient to meet the requirements.

[0030] A gate valve 9 is installed on the biogas slurry circulation pipe 8 between the biogas digester 1 and the slag discharge tank 2 to prevent biogas slag from re-entering the biogas digester 1 through the biogas slurry circulation pipe 8.

[0031] A biogas transmission pipe 10 is installed on the top of the biogas digester 1, and a pressure gauge is installed on the biogas transmission pipe 10.

[0032] The biogas digester 1 is equipped with a biogas delivery device connected to a biogas delivery pipe 10. The biogas delivery device includes a biogas compression and filtration device, a check valve, a pressure gauge, a gas safety device, and a gas outlet pipe. The biogas compression and filtration device includes a primary filter, a compressor, and a fine filter. The primary filter is connected to a pipe of a red mud soft biogas storage bag, and then the pipe is connected to the compressor. The compressor pipe is connected to the fine filter, the fine filter pipe is connected to the check valve, and the check valve pipe is connected to the gas outlet pipe. Pressure gauges are installed on the inlet and outlet pipes of the compressor. The compressor outlet pipe is connected in parallel to the gas safety device. The gas safety device includes a safety valve, a pressure relief pipe, and a rain cap. One end of the safety valve is connected to the compressor outlet pipe, and the other end is connected to the pressure relief pipe. The pressure relief pipe leads out of the plastic greenhouse, and a rain cap is installed at the end outside the plastic greenhouse.

[0033] The pipelines or conduits of the biogas delivery device are made of PE pipes.

[0034] The auxiliary heating device includes a heating unit and a medium pipeline. The electric heating unit is located next to the biogas digester. The medium pipeline can be laid at the bottom and side walls of the biogas digester and is connected to the heating unit via a circulation pump. The electric heating unit heats the medium, and the heated medium circulates within the medium pipeline through the circulation pump, heating the biogas digester and raising its ambient temperature. The medium pipeline is a floor heating pipe. The medium is typically water. To prevent clogging of the medium pipeline, a descaling agent is added to the water during use.

[0035] The auxiliary heating device can be directly connected to mains power to supply power to the electric heating device.

[0036] Example 2: This embodiment is a new energy biogas digester.

[0037] like Figure 3 and Figure 4 As shown, according to one aspect of this application, one embodiment provides a new energy biogas digester, including a plastic greenhouse 11. In order to enable the biogas digester to be used for a long time, the plastic greenhouse 11 is usually equipped with windbreak walls on the east, west and north sides. The windbreak walls can be made of brick and concrete or earthen walls, etc., and a plastic film is installed in the south-facing direction. Since the climate in Northeast China is cold, the plastic greenhouse 11 is usually covered with two or three layers of plastic film to increase the heat preservation effect of the plastic greenhouse 11.

[0038] Inside the plastic greenhouse 11, a biogas digester 1 is excavated and constructed. The biogas digester 1 can be built using a brick-concrete structure or a concrete structure. The walls of the biogas digester 1 include an insulation layer, which is made of insulating perlite and lightweight insulating bricks. To prevent biogas slurry leakage, both the inner and outer walls of the biogas digester 1 are lined with a geomembrane to prevent seepage. The biogas digester 1 has a fixed top cover, typically a dome, to facilitate biogas collection. The bottom of the biogas digester 1 is sloped, with a lowest point. The slope angle is typically between 3-10°, preferably 6-8°, allowing for rapid slag removal.

[0039] A booster tank 4 and a slag discharge tank 2 are built next to the biogas digester 1. The biogas digester 1 is connected to the slag discharge tank 2 at its lowest point through a slag discharge pipe 3. The slag discharge pipe 3 can be bricked or made of pre-formed pipes, such as ceramic pipes or PVC pipes. For example, PVC pipes with a diameter of 310mm are usually used to allow the relatively viscous biogas residue and biogas slurry mixture to enter the slag discharge tank. A channel 5 is provided between the bottom of the biogas digester 1 and the booster tank 4, connecting the two channels. The channel 5 is also bricked in two layers. The biogas digester 1 is provided with a feed trough 6, and a flue pipe 7 is provided at the bottom of the feed trough 6. The flue pipe 7 extends downward to the lower part of the biogas digester 1. Both the feed trough 6 and the flue pipe 7 are bricked. Since the booster tank 4, slag discharge tank 2 and feed trough 6 do not require fermentation, the tank walls of the booster tank 4, slag discharge tank 2 and feed trough 6 do not need to have an insulation layer. However, in order to prevent the biogas slurry from seeping into the soil, a geomembrane needs to be installed on the inner or outer wall.

[0040] Covers may be installed above the pressurization tank 4, slag discharge tank 2, and feed trough 6 to prevent people and animals from accidentally entering the tanks.

[0041] The booster tank 4 is connected to the biogas digester 1. During gas production, the biogas produced by microbial fermentation rises to the gas storage chamber. Because the biogas digester 1 is sealed and leak-proof, the biogas continuously accumulates, generating pressure. When the biogas pressure exceeds atmospheric pressure, it forces the material in the biogas digester 1 out, causing the water level in the booster tank 4 to rise and the water pressure in the biogas digester 1 to drop, creating a water level difference. This water pressure difference maintains a certain pressure for the biogas in the digester. According to actual measurements, the maximum biogas pressure in the biogas digester 1 can reach 14 MPa. The slag discharge tank 2 is equipped with a biogas slurry circulation pipe 8, which is connected to the upper part of the flue pipe 7. The biogas slurry circulation pipe 8 is made of PVC pipe. Since the biogas slurry and biogas residue have been settled in the slag discharge tank 2, the biogas residue content in the biogas slurry is relatively low. Therefore, a PVC pipe with a diameter of 100mm or 120mm is sufficient to meet the requirements.

[0042] A gate valve 9 is installed on the biogas slurry circulation pipe 8 between the biogas digester 1 and the slag discharge tank 2 to prevent biogas slag from re-entering the biogas digester 1 through the biogas slurry circulation pipe 8.

[0043] A biogas transmission pipe 10 is installed on the top of the biogas digester 1, and a pressure gauge is installed on the biogas transmission pipe 10.

[0044] A biogas storage bag 12 (preferably made of soft red mud) is installed inside the plastic greenhouse and connected to the biogas digester 1 via a biogas delivery pipe 10. The soft red mud biogas storage bag significantly increases the usable volume of the biogas digester 1 and allows for the storage of more biogas, resulting in a more balanced use of biogas. The soft red mud biogas storage bag 12 is a flexible gas storage device with a high-polymer composite red mud membrane as the main material. It is made by using a red mud-modified PVC composite membrane (containing 30%-50% red mud) and a high-strength polyester fiber mesh layer, manufactured through a high-frequency heat-sealing process. The red mud component gives the material excellent UV resistance and aging resistance, allowing for long-term use in environments ranging from -20℃ to 50℃. Utilizing the flexible and expandable properties of the red mud membrane, biogas storage is achieved through pressure difference. A closed gas chamber is formed inside the bag, automatically expanding to store gas when biogas is produced; when gas is needed, it is supplied through natural pressure reduction or a booster pump. The soft red mud biogas storage bag has significant advantages such as strong weather resistance, convenient installation, and low cost.

[0045] The biogas storage bag 12 is equipped with a biogas delivery device, including a biogas compression and filtration device, a check valve, a pressure gauge, a gas safety device, and a gas outlet pipeline. The biogas compression and filtration device includes a primary filter, a compressor, and a fine filter. The primary filter is connected to the red mud soft biogas storage bag pipeline, which is then connected to the compressor. The compressor pipeline is connected to the fine filter, and the fine filter pipeline is connected to the check valve. The check valve pipeline is connected to the gas outlet pipeline. Pressure gauges are installed on the compressor inlet and outlet pipelines. The compressor outlet pipeline is connected in parallel to the gas safety device, which includes a safety valve, a pressure relief pipe, and a rain cap. One end of the safety valve is connected to the compressor outlet pipeline, and the other end is connected to the pressure relief pipe. The pressure relief pipe leads out of the plastic greenhouse, and a rain cap is installed at the end outside the plastic greenhouse.

[0046] The pipelines or conduits of the biogas delivery device are made of PE pipes.

[0047] A solar photovoltaic power station is installed above the plastic greenhouse. Since the biogas digester inside the greenhouse does not require sunlight, the greenhouse's function is to insulate the digester, preventing the biogas bacteria from becoming less active and producing less gas at low temperatures. Installing the solar photovoltaic power station above the biogas digester does not affect the greenhouse's insulation function. The solar photovoltaic power station is installed according to the area of ​​the plastic greenhouse, similar to a household solar photovoltaic power station. It can operate independently off-grid, providing enough electricity for the biogas digester's needs, such as lighting inside the greenhouse and for the biogas delivery system. Excess electricity can also be sent to the farmer's home or even fed into the grid for further power generation, generating additional benefits.

[0048] Example 3: This embodiment is an improvement on Embodiment 1 and Embodiment 2, mainly to save costs. The biogas digester 1, the booster tank 4, and the slag discharge tank 2 are made of anti-aging and corrosion-resistant high-density plastic in one piece, which not only has a long service life, but also a short construction time and low cost.

[0049] This utility model discloses a new energy biogas digester that can be used year-round. It utilizes the insulation of a plastic greenhouse and an auxiliary heating device to provide the necessary temperature for normal fermentation, ensuring stable and efficient biogas production.

[0050] This utility model discloses a new energy biogas digester. Through a biogas slurry circulation pipe, the biogas slurry can be recycled, reducing the amount of slurry needed for replenishment. Simultaneously, it maintains the temperature within the biogas digester, preventing large temperature fluctuations and achieving stable biogas production. It also allows for the full fermentation of solid materials entering the digester, producing more biogas than existing biogas digesters with the same feed amount. The design of the slag discharge tank allows the fermented biogas slag to automatically flow from the bottom of the digester up the discharge pipe into the slag discharge tank, facilitating cleaning of the tank on the ground. This enables continuous use of the biogas digester and extends its service life.

[0051] This utility model discloses a new energy biogas digester, which has the advantages of small investment scale. Compared with the original biogas digester, the investment is relatively small, and there is no need for additional investment in the later stage. The one-time investment can be used for more than 20 years. It has high returns, with a volume of 40m³. 3 Taking a biogas digester as an example, 5 tons of dry matter can be added continuously or intermittently over two months, producing approximately 1000 m³ of biogas. 3 Based on a methane content of 80% in biogas and the current natural gas price of 4 yuan per cubic meter, the equivalent profit over two months would be no less than 3,000 yuan.

[0052] This utility model discloses a new energy biogas digester with high organic fertilizer output. The treated biogas residue contains a large amount of nitrogen, phosphorus, potassium, and other organic nutrients needed for crop growth and can be used as fertilizer. Generally speaking, 100kg of biogas residue is equivalent to 6kg of NPK compound fertilizer. Calculated on a two-month cycle, the biogas residue produced in two months is equivalent to 1.8t of NPK compound fertilizer. At NPK compound fertilizer price of 2400 yuan / t, the organic fertilizer output value is approximately over 4000 yuan.

[0053] This utility model discloses a new energy biogas digester with an inclined bottom that guides the biogas residue to the lowest point. In conjunction with a pressure booster, the biogas residue can be naturally discharged into the discharge tank through the discharge pipe, eliminating the need for personnel to enter the biogas digester for cleaning. This not only reduces the labor intensity of personnel but also avoids the harm to personnel caused by toxic and harmful gases contained in the fermented biogas residue.

[0054] This utility model provides a new energy biogas digester with good environmental protection effects. It can convert livestock and poultry manure and straw into biogas and achieve the ecological effect of zero pollution and zero emissions, reducing the probability of rural land pollution, water pollution and air pollution.

[0055] This utility model relates to a new energy biogas digester, which is suitable for use in northern regions, especially the northeastern region.

[0056] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A new energy biogas tank, characterized in that: The system includes a biogas digester with a fixed top cover and a sloping bottom, having a lowest point. A booster tank and a slag discharge tank are located next to the biogas digester. The biogas digester is connected to the slag discharge tank at its lowest point via a slag discharge pipe. A channel connects the bottom of the biogas digester to the booster tank. The biogas digester has a feed trough with a flue pipe at its bottom, extending downwards to the lower part of the biogas digester. The slag discharge tank has a biogas slurry circulation pipe connected to the upper part of the flue pipe. The digester walls are insulated, and an auxiliary heating device is installed inside the digester. A biogas transmission pipe with a pressure gauge is located on the top of the digester. The biogas digester is situated inside a plastic greenhouse.

2. The new energy biogas tank according to claim 1, characterized in that: A gate valve is installed on the biogas slurry circulation pipe between the biogas digester and the slag discharge tank.

3. The new energy biogas tank according to claim 1, characterized in that: It also includes a biogas storage bag, which is placed next to the biogas digester. The biogas digester is connected to the biogas storage bag via a biogas transmission pipe, and a valve is installed on the biogas transmission pipe.

4. The new energy biogas tank according to claim 1 or 3, characterized in that: The biogas digester or biogas storage bag is equipped with a biogas delivery device, including a biogas compression and filtration device, a check valve, a pressure gauge, a gas safety device, and a gas outlet pipeline. The biogas compression and filtration device includes a primary filter, a compressor, and a fine filter. The primary filter is connected to the red mud soft biogas storage bag pipeline, which is then connected to the compressor. The compressor pipeline is connected to the fine filter, and the fine filter pipeline is connected to the check valve. The check valve pipeline is connected to the gas outlet pipeline. Pressure gauges are installed on the compressor inlet and outlet pipelines. The compressor outlet pipeline is connected in parallel to the gas safety device, which includes a safety valve, a pressure relief pipe, and a rain cap. One end of the safety valve is connected to the compressor outlet pipeline, and the other end is connected to the pressure relief pipe. The pressure relief pipe leads out of the plastic greenhouse, and a rain cap is installed at the end outside the plastic greenhouse.

5. The new energy biogas tank according to claim 4, characterized in that: The biogas conveying device uses PE pipes or stainless steel pipes for its pipelines or conduits, and the conduits are grounded at certain intervals.

6. The new energy biogas tank according to claim 1, characterized in that: The insulation layer can be laid using one or more of the following: perlite and perlite bricks, vermiculite and vermiculite bricks, foamed cement, rock wool and rock wool board, silicate insulation materials, ceramic insulation materials, aerogel felt and polymer foam.

7. The new energy biogas tank according to claim 1, characterized in that: The auxiliary heating device includes an electric heating device and a medium pipeline. The electric heating device is installed next to the biogas digester, and the medium pipeline can be laid at the bottom and side wall of the biogas digester and connected to the electric heating device through a circulation pump.

8. The new energy biogas tank according to claim 7, characterized in that: The medium pipeline is a floor heating pipe.

9. The new energy biogas tank according to claim 1, characterized in that: A solar photovoltaic power station is installed above the plastic greenhouse, which supplies power to the auxiliary heating device and the biogas transmission device.

10. The new energy biogas tank according to claim 1, characterized in that: The biogas digester, pressurization tank, and slag discharge tank are provided with geomembranes on their inner and / or outer walls.

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