CN211399947U - A large-scale dormitory building water supply heating system - Google Patents

Abstract

The utility model relates to a water supply and heating system for a large dormitory building, which comprises a vacuum tube type solar heat collector pipeline subsystem, a methane tank pipeline subsystem, a water collector and a user side subsystem; the water collector is arranged indoors, the vacuum tube type solar heat collector pipeline subsystem is integrally arranged on the building roof, the methane tank pipeline subsystem is integrally arranged underground of the building or in the downstairs hollow place of the existing building, and a feed inlet of the methane tank pipeline subsystem is connected with the excrement of the whole building and the sewer pipe of the domestic garbage; the hot water outlets of the vacuum tube type solar heat collector pipeline subsystem and the methane tank pipeline subsystem are respectively connected with two water inlets of a water collector, the water outlets of the water collector are connected with hot water ports of a plurality of user side subsystems, and the water outlet ends of the user side subsystems are sequentially connected with a user side water faucet through a three-way valve and a temperature sensor. The system simultaneously utilizes the solar energy and the methane to preheat or heat the cold water, reduces the energy consumption and saves the operation cost.

Description

A large-scale dormitory building water supply heating system

technical field

The utility model relates to a water supply system, in particular to a large-scale dormitory building water supply and heating system utilizing renewable energy such as solar energy and biogas.

Background technique

Energy is the material basis for the survival and development of human society. With the continuous uncontrolled development and utilization of fossil energy, it has a huge impact on our living home. Nowadays, we pay more and more attention to the use of renewable energy, reduce the use of fossil energy, and thus protect the environment. At this stage, domestic dormitories are all in the form of collective dormitories. Most of the student dormitories do not adopt the form of single bath and private bathroom, but have a centralized water room and toilet on each floor of the dormitory building. In this type of dormitory building, the water room only has cold water supply and no hot water supply. If you want to get warm water or hot water, you need to solve it yourself. When a large amount of hot water is needed, many trips to the hot water room are required to fetch water, and the running time of the hot water room is also within a certain range, which leads to some inconvenient problems in life. According to this phenomenon, it is very necessary to provide a water heating system for dormitory.

To sum up, the system proposed by the present invention can solve the above problems well, reduce the development and practical use of fossil fuels, make better use of renewable energy such as solar energy and biogas, and protect the environment.

Utility model content

Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a water supply and heating system for large-scale dormitory buildings that utilizes renewable energy such as solar energy and biogas for daily water use.

The technical solution adopted by the utility model to solve the technical problem is: to provide a water supply and heating system for large-scale dormitory buildings, which is characterized in that the system includes a vacuum tube solar collector pipeline subsystem, a biogas digester pipeline subsystem, and a water collector. and user terminal system; the water collector is installed indoors, the vacuum tube solar collector pipeline subsystem is installed on the roof of the building as a whole, and the biogas digester pipeline subsystem is installed on the underground of the building or the open space of the existing building. , the feed inlet of the pipeline subsystem of the biogas digester is connected to the drain pipe of the whole building's excrement and domestic waste;

The hot water outlet of the vacuum tube solar collector pipeline subsystem and the biogas digester pipeline subsystem are respectively connected to the two water inlets of the water collector, and the water outlet of the water collector is connected to the hot water ports of multiple user terminal systems. The cold water port of the terminal system is directly connected to the municipal pipe network for water supply, and the water outlet of the user terminal system is connected to the user-end faucet through a three-way valve and a temperature sensor in turn. Control valves are also installed on the hot water port and cold water port of the terminal system, and a three-way valve is also installed on the pipeline inside the cold water port control valve of the user terminal system, and the two three-way valves are connected.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The system of the present invention utilizes renewable energy such as solar energy and biogas to preheat or heat cold water, thereby improving the utilization rate of renewable energy.

2. The user terminal system in this system adopts the mixing method of hot water and cold water, which avoids the risk of unsafe electrical appliances caused by water leakage from the currently used heating faucet, and also avoids the use of electric heating, reducing the consumption of high-quality energy, and then Save energy and protect the environment.

3. The system of the utility model mixes water in a small water tank, which can produce hot water immediately, which facilitates the use of hot water required by life, meets the needs of people's daily life, and can also solve a large amount of hot water during peak water consumption. consumption problem.

4. The utility model has the advantages of simple structure and reasonable design, which not only saves energy, but also reduces damage and pollution to the environment, and has a positive and important influence on the sustainable development strategy.

Description of drawings

Figure 1 is a schematic diagram of the connection structure of a water supply heating system for a large-scale dormitory building of the present invention.

FIG. 2 is a schematic diagram of the temperature control structure in the user-end faucet.

Figure 3 is a diagram of the internal layers of the fermentation room.

Figure 4 is a schematic diagram of the system pipeline.

In the figure, feed inlet 1, fermentation room 2, biogas storage room 3, gas outlet 4, water pressure room 5, biogas heating device 6, biogas digester phase change heat storage tank 7, vacuum tube solar collector 8, solar energy Phase change heat storage tank 9, solar pipeline circulating water pump 10, water collector 11, user-end faucet 12, small water tank 13, temperature sensor 14, biogas digester gas outlet gate valve 15, biogas heating device water inlet gate valve 16, biogas heating device Outlet gate valve 17, biogas tank phase change heat storage tank inlet gate valve 18, biogas pipeline water collector water inlet gate valve 19, solar pipeline water collector water inlet gate valve 20, solar phase change heat storage tank water inlet gate valve 21, vacuum tube Type solar collector water outlet gate valve 22, water collector water outlet gate valve 23, vacuum tube solar collector water outlet three-way valve 24, solar phase change heat storage tank water outlet three-way valve 25, biogas digester phase change heat storage Tank outlet three-way valve 26, biogas digester phase change heat storage tank water inlet three-way valve 27, hot water inlet electric valve in temperature control structure 28, cold water inlet electric valve in temperature control structure 29, small water tank cold water inlet The front three-way valve 30, the small water tank water outlet three-way valve 31, the biogas digester pipeline circulating water pump 32, and the vacuum tube solar collector water inlet valve 33.

Detailed ways

The present utility model is further described below in conjunction with the embodiments and the accompanying drawings, but this is not intended to limit the protection scope of the present application.

The utility model large-scale dormitory building water supply and heating system comprises a vacuum tube type solar collector pipeline subsystem, a biogas digester pipeline subsystem, a water collector and a user terminal system; the water collector is installed indoors, and the vacuum tube type solar collector tube The road subsystem is installed on the roof of the building as a whole, and the biogas digester pipeline subsystem is installed on the ground floor of the building or in the open space below the existing building. water pipe;

The hot water outlet of the vacuum tube solar collector pipeline subsystem and the biogas digester pipeline subsystem are respectively connected to the two water inlets of the water collector, and the water outlet of the water collector is connected to the hot water ports of multiple user terminal systems. The cold water port of the terminal system is directly connected to the municipal pipe network for water supply, and the water outlet of the user terminal system is connected to the user-end faucet through a three-way valve and a temperature sensor in turn. Control valves are also installed on the hot water port and cold water port of the terminal system, and a three-way valve is also installed on the pipeline inside the cold water port control valve of the user terminal system, and the two three-way valves are connected.

The vacuum tube solar collector pipeline subsystem includes a vacuum tube solar collector 8, a solar phase change thermal storage tank 9, a solar pipeline circulating water pump 10, and the solar phase change thermal storage tank is filled with phase change materials. The water inlet of the collector is connected to the cold water of the municipal pipe network, the water outlet of the vacuum tube solar collector is connected to the three-way valve 24 of the water outlet of the vacuum tube solar collector, and the three-way valve 24 of the water outlet of the vacuum tube solar collector is connected by the solar energy The phase change heat storage tank is connected to the three-way valve 25 of the water outlet of the solar phase change heat storage tank. On the other hand, the three-way valve 24 of the water outlet of the vacuum tube solar collector is directly connected to the three-way valve 25 of the water outlet of the solar phase change heat storage tank. ; The three-way valve 25 of the water outlet of the solar phase change heat storage tank is connected to a water inlet of the water collector through the solar pipeline circulating water pump 10.

The biogas tank pipeline subsystem includes a biogas tank, a biogas heating device 6, a biogas tank phase change heat storage tank 7 and a biogas tank pipeline circulating water pump 32. The biogas tank includes a fermentation room 2, a biogas storage room 3 and a water pressure room. 5. The upper part of the fermentation room 2 is connected to the feed port 1 and the water pressure room 5, the upper part of the fermentation room 2 is connected to the biogas storage chamber 3, the biogas storage chamber 3 is provided with a gas outlet 4, and the gas outlet 4 is connected to a biogas heating device through the biogas pretreatment equipment 6. The water inlet of the biogas heating device 6 is used to connect the cold water of the municipal pipe network, and the water outlet of the biogas heating device 6 is used to connect the three-way valve 27 of the water inlet of the phase change heat storage tank of the biogas digester; On the one hand, the valve 27 is connected to the three-way valve 26 of the water outlet of the phase change heat storage tank of the biogas digester through the phase change heat storage tank 7 of the biogas digester; at the same time, the three-way valve 27 of the water inlet of the phase change heat storage tank of the biogas digester is directly connected to the phase change heat storage tank of the biogas digester. The three-way valve 26 of the water outlet of the hot tank is connected; the three-way valve 26 of the water outlet of the phase change heat storage tank of the biogas tank is connected to another water inlet of the water collector through the circulating water pump 32 of the pipeline of the biogas tank.

The biogas digester is placed in the underground of the dormitory. Figure 4 is a schematic diagram of the structure of the system installed in the dormitory. It can be seen from Figure 4 that the excrement is in the dormitory building. On the dry pipe, after passing through the dry pipe, it reaches the feed port 1, and then the fermentation process is carried out in the fermentation room 2 to generate biogas. For a student dormitory, it is well known in the art that the drainage pipelines up and down the stairs all have a main pipeline, and waste will be discharged centrally through the main pipeline. Since it is a large dormitory, the overall amount of fermentation raw materials is also considerable.

Figure 3 shows the internal layering diagram of the fermentation room, and then the calculation of the specific design volume of the fermentation room is shown in the following formula. In the actual project, the formula is directly used for the design calculation of the fermentation room.

1. The volume of the fermentation room

V=(V ₁ −V ₂ )·k ₁

In the formula, V—the volume of the fermentation room, m ³ ;

V ₁ —volume of fermentation feed liquid, m ³ ;

V ₂ - volume of air chamber, m ³ ;

k ₁ —Volume protection coefficient, take 0.9～1.05.

2. Determine the size of each part of the fermentation room

The diameter of the digester is determined according to requirements, experience and graphic design

(1) The sag height and net volume of the spheroid are cut by the cover of the fermentation room.

①The pool cover cuts the sphere vector height

f ₁ =D/a ₁

In the formula, f ₁ ——the sag height of the sphere cut by the pool cover, m;

D—diameter of cylindrical pool body, m;

a ₁ - ratio of diameter to sag of tank body,

②The net volume of the pool cover cut sphere

Q ₁ =π/6*f ₁ (3R ² +f ₁ ² )

In the formula, Q ₁ - the net volume of the sphere cut off the pool cover, m ³ ;

π—pi ratio;

f ₁ —the sag height of the sphere cut by the pool cover, m;

R—the inner radius of the cylinder of the pool body, m.

(2) The sag height and net volume of the bottom sphere in the fermentation room.

①Cut the ball at the bottom of the pool

f ₂ =D/a ₂

In the formula, f _2— the sag height of the sphere at the bottom of the pool, m;

D—the diameter of the cylinder of the pool, m;

a ₂ — ratio of diameter to pond bottom sag,

②The net volume of the spheroid at the bottom of the pool

Q ₃ =π/6*f ₂ (3R ² +f ₂ ² )

In the formula, f ₂ -- the sag height of the sphere at the bottom of the pool, m;

Q ₃ —net volume of the spheroid at the bottom of the fermentation room, m ³ ;

π—pi ratio.

(3) The volume of the cylinder of the fermentation room and the height of the pool wall.

①The volume of the cylinder in the fermentation room

Q ₂ =VQ ₁ -Q ₃

In the formula, Q ₁ - the net volume of the sphere cut off the pool cover, m ³ ;

V—total volume of fermentation room, m ³ ;

Q ₂ - the volume of the cylinder of the fermentation room, m ³ ;

Q ₃ - net volume of spheroids at the bottom of the fermentation room, m ³ .

②The height of the cylinder in the fermentation room

H=Q ₂ /πR ²

where π is the ratio of pi;

R—the radius of the cylinder of the fermentation room, m;

H—the height of the cylinder body of the fermentation room, m.

(4) The total area of the fermentation room

S=S ₁ +S ₂ +S ₃

In the formula, S—the total internal surface area, m ²

S ₁ — the inner surface area of the sphere of the pool cover, m ²

S ₂ — the inner surface area of the cylinder of the pool body, m ²

S ₃ — Internal surface area of the sphere at the bottom of the pool, m ²

①Cover the inner surface area of the sphere

S ₁ =π(R ² +f ₁ ² )

In the formula, S ₁ - the inner surface area of the chipping surface of the pool cover, m ³ ;

R—the radius of the cylinder of the pool body, m;

f ₁ —The sag of the pool cover, m;

π—pi ratio.

②The inner surface area of the cylinder body

S ₂ =2πRH

In the formula, S ₂ —the inner surface area of the tank body cylinder, m ² ;

R—the inner radius of the cylinder in the pool, m;

H—the height of the cylinder of the pool body, m;

π—pi ratio.

③The internal surface area of the sphere at the bottom of the pool

S ₃ =π(R ² +f ₂ ² )

In the formula, S ₃ —the internal surface area of the shard at the bottom of the pool, m ² ;

f ₂ —The sag of the bottom of the pool, m;

R—the inner radius of the cylinder of the pool, m;

π—pi ratio.

The heating system of the present application is only used for hot water in daily life, and is not used for direct hot drinking water.

During the operation of the system of the utility model, it is divided into peak operation time, normal operation time and low energy consumption operation time. Among them, 6:00 to 8:00 in the morning and 7:00 to 9:00 in the evening are the peak operating hours of the day, and solar heating and biogas heating work together; except during the daytime during the morning peak and evening peak, the demand on the user side is relatively high. The two phase-change heat storage tanks store heat, and this time period is normal operation time; after the evening peak to the next morning peak at night, the demand on the user side is low, and the biogas digester continues to work for its phase-change heat storage. The storage heat of the tank until it is saturated, this time period is the low energy operation time. During these two peak hours, the two pipeline subsystems of solar energy and biogas digester operate simultaneously, and at the same time, the two phase-change heat storage tanks also release energy to supply a large amount of hot water during peak hours. The biogas produced by fermentation in the digester is continuous, but solar energy can only be collected during the day and used for supply at night. By controlling the control valve on the water inlet of the water collector, you can manually control which heat source is selected for heating. During the day, try to use the biogas digester for supply, and transport the heat collected by the solar energy to the solar phase change heat storage tank for storage during the day, and then use the stored heat to supplement the demand during peak hours or supply demand at night.

The system of the utility model is proposed in view of the problem of inconvenient use of hot water in the current dormitory, avoids the problem of high power consumption caused by the existing use of electric heating to supply hot water, reduces environmental pollution, and utilizes solar energy and biogas. Clean energy, combined with the mixture of cold and hot water instead of electric heating, is convenient to supply hot water and can meet the needs of users for domestic water.

This system uses solar collectors to heat hot water, transports hot water through thermal insulation pipes, and uses hot water to heat cold water at the user end of the dormitory. When the user end uses too little, the excess hot water heat is stored in phase change materials. When the amount of hot water is large, the heat stored by the phase change material is released to meet the needs of users. At the same time, the waste in the toilet is collected, stored in the biogas tank, and the generated biogas is used to heat the cold water. The combined use of solar energy and biogas avoids the lack of sunlight, which leads to insufficient heating and insufficient supply of water in the dormitory during peak periods. Under the utilization of two clean and renewable energy sources of solar energy and biogas, dormitory users can get warm water or even hot water, which can meet the needs of hot water in winter and is convenient for users. In the process of hot water transportation, the pipelines are all insulated.

Example 1

This embodiment provides a large-scale dormitory building water supply and heating system using renewable energy such as solar energy and biogas for daily water supply. The system includes a vacuum tube solar collector pipeline subsystem, a biogas digester pipeline subsystem, a water collector and a user terminal system. . The water collector is installed indoors,

The vacuum tube type solar collector pipeline subsystem includes a vacuum tube type solar collector 8 , a solar phase change heat storage tank 9 , and a solar pipeline circulating water pump 10 . The pipeline subsystem of the vacuum tube solar collector is installed on the roof of the building as a whole. The selected model of the vacuum tube solar collector is Haier Q-B-J-1-155/2.50/0.05-D/I38, and the model of the solar pipeline circulating water pump is 25LG3 -10x3, phase change material with paraffin base mixed with n-butyl stearate. The cold water from the municipal pipe network passes through the vacuum tube solar collector water inlet valve 33 to the vacuum tube solar collector 8 for heating, and then passes through the vacuum tube solar collector water outlet gate valve 22 to reach the vacuum tube solar collector water outlet Three-way valve 24. It is divided into two pipelines here: one is through the gate valve 21 at the inlet of the solar phase change heat storage tank to reach the solar phase change heat storage tank 9 for heat storage and heat release, and then passes through the three-way valve at the water outlet of the solar phase change heat storage tank 25 to reach the solar pipeline circulating water pump 10. The other is to directly reach the solar pipeline circulating water pump 10 through the three-way valve 25 of the water outlet of the solar phase change heat storage tank. Then, it is pressurized by the solar pipeline circulating water pump 10 and enters the water collector 11 .

The biogas tank pipeline subsystem includes a biogas tank, a biogas heating device 6, a biogas tank phase change heat storage tank 7, and a biogas tank pipeline circulating water pump 32. The biogas tank includes a fermentation room 2, a biogas storage room 3 and a water pressure room. 5. Fermentation room 2 is connected to feed inlet 1 and water pressure room 5. The excrement and domestic waste of the whole building enter fermentation room 2 from feed inlet 1 for fermentation to produce biogas. The upper part of fermentation room 2 is connected to biogas storage room 3. Biogas An air outlet 4 is provided on the storage chamber 3 . The pipeline subsystem of the biogas digester is installed on the ground floor of the building or in the open space of the existing building. The biogas digester adopts a hydraulic type, and the biogas heating device adopts a small gas boiler. The size of the small gas boiler is related to the hot water load of the whole building. Relatedly, the phase change material uses a paraffin base blended with n-butyl stearate. The excrement and domestic waste of the whole building enter the fermentation room 2 through the feed port 1 for fermentation to produce biogas. Due to the pressure change in the water pressure room 5 and the biogas tank, the generated biogas rises to the gas outlet 4 . The biogas from the gas outlet 4 passes through the gas outlet gate valve 15 of the biogas tank to the pretreatment equipment for pretreatment of the biogas. The pretreated biogas leads to the biogas heating device 6, and is heated in the biogas heating device 6 and passes through the biogas heating device. The cold water from the municipal pipe network of the gate valve 16 is heated through the gate valve 17 at the outlet of the biogas heating device to reach the three-way valve 27 at the water inlet of the phase change heat storage tank of the biogas digester. It is divided into two pipelines here: one is the gate valve 18 at the inlet of the biogas tank phase change heat storage tank 7 to the biogas tank phase change heat storage tank 7 for heat storage and heat release, and then passes through the biogas tank phase change heat storage tank water outlet three The valve 26 reaches the circulating water pump 32 of the biogas digester pipeline. The other is to directly reach the circulating water pump 32 of the biogas tank pipeline through the three-way valve 26 of the water outlet of the phase change heat storage tank of the biogas tank. Then, it is pressurized by the circulating water pump 32 of the biogas pipeline and enters the water collector 11 through the gate valve 19 of the water inlet of the biogas pipeline water collector. The biogas pretreatment equipment here can directly use the existing equipment, and the pretreatment process is also the existing technology.

The biogas tank is a hydraulic type biogas tank that uses part of the feed liquid to move back and forth, causing repeated changes in water pressure to store and discharge biogas. , the biogas pressure increases accordingly. This increasing air pressure forces a part of the feed liquid in the biogas digester to enter the water pressure room that communicates with the pool body, so that the liquid level in the water pressure room rises. In this way, there is a water level difference between the liquid level in the water pressure room and the liquid level in the biogas digester. This water level difference is called "water pressure", which is the value displayed by the U-tube biogas pressure gauge). When the gas is used, the biogas switch is turned on, and the biogas is discharged under the water pressure; when the biogas is reduced, the feed liquid between the water pressure returns to the tank body, so that the water level difference continues to decrease, resulting in a corresponding decrease in the biogas pressure.

The user terminal system includes a user-end temperature control structure, a user-end faucet 12 and a water collector water outlet gate valve 23 . The user-end temperature control structure includes cold water from the municipal pipe network, hot water heated by solar energy and biogas, and a digital display temperature sensor 14 . The hot water comes out of the water collector 11 through the water collector outlet gate valve 23 to the temperature control structure. In the temperature control structure, the hot water enters the small water tank 13 through the electric valve 28 of the hot water inlet in the temperature control structure, and then mixes with the cold water in the small water tank 13 and passes through the three-way valve 31 and the temperature sensor 14 at the water outlet of the small water tank. The temperature is detected at the temperature sensor 14. If the temperature is higher than the set temperature, the cold water directly passes through the three-way valve 30 in front of the cold water inlet of the small water tank and the three-way valve 31 at the water outlet of the small water tank to adjust the temperature of the water. If the temperature is lower than the set temperature, reduce the opening degree of the electric valve 29 of the cold water inlet in the temperature control structure, and increase the opening degree of the electric valve 28 of the hot water inlet in the temperature control structure to increase the water temperature. The size of the small water tank 13 is a rectangular structure of 30cm*30cm.

Users can adjust the hot water inlet electric valve 28 in the temperature control structure, the cold water inlet electric valve 29 in the temperature control structure, the three-way valve 31 at the water outlet of the small water tank, and the three-way valve 30 in front of the cold water inlet of the small water tank according to their own requirements. The switch and the degree of switch, and then change the mixing ratio of cold water and hot water to meet the needs of users. There is a temperature sensor before the outlet of the user to monitor the water temperature at the outlet, and the switch size of the valve is changed according to the temperature required by the user, so as to obtain the appropriate water temperature. If the user wants to use cold water directly, only open the electric valve 29 at the cold water inlet in the temperature control structure, the three-way valve 31 at the water outlet of the small water tank, and the three-way valve 30 in front of the cold water inlet of the small water tank. The cold water of the municipal official website meets the basic needs of users.

The parts not covered by the present invention are applicable to the prior art.

Claims (3)

1. a large-scale dormitory building water supply heating system, is characterized in that, this system comprises vacuum tube type solar collector pipeline subsystem, biogas digester pipeline subsystem, water collector and user terminal system; Described water collector is installed indoors , The vacuum tube solar collector pipeline subsystem is installed on the roof of the building as a whole, the biogas digester pipeline subsystem is installed on the ground floor of the building or in the open space of an existing building, and the feed inlet of the biogas digester pipeline subsystem is connected to the entire building. sewer pipes for excreta and household waste; The hot water outlet of the vacuum tube solar collector pipeline subsystem and the biogas digester pipeline subsystem are respectively connected to the two water inlets of the water collector, and the water outlet of the water collector is connected to the hot water ports of multiple user terminal systems. The cold water port of the terminal system is directly connected to the municipal pipe network for water supply, and the water outlet of the user terminal system is connected to the user-end faucet through a three-way valve and a temperature sensor in turn. Control valves are also installed on the hot water port and cold water port of the terminal system, and a three-way valve is also installed on the pipeline inside the cold water port control valve of the user terminal system, and the two three-way valves are connected. 2. The large-scale dormitory building water supply and heating system according to claim 1, wherein the vacuum tube type solar collector pipeline subsystem comprises a vacuum tube type solar collector, a solar phase change heat storage tank, and a solar pipeline circulation The water pump, the solar phase change heat storage tank is filled with phase change material, the water inlet of the vacuum tube solar collector is connected to the cold water of the municipal pipe network, the water outlet of the vacuum tube solar collector is connected to the three-way valve of the water outlet of the vacuum tube solar collector, On the one hand, the three-way valve of the water outlet of the vacuum tube solar collector is connected to the three-way valve of the water outlet of the solar phase change heat storage tank after passing through the solar phase change heat storage tank. On the other hand, the three-way valve of the water outlet of the vacuum tube solar collector is directly Connect the three-way valve of the water outlet of the solar phase change heat storage tank; the three-way valve of the water outlet of the solar phase change heat storage tank is connected to a water inlet of the water collector through the solar pipeline circulating water pump. 3. The large-scale dormitory building water supply and heating system according to claim 1, wherein the biogas tank pipeline subsystem comprises a biogas tank, a biogas heating device, a biogas tank phase-change heat storage tank and a biogas tank pipeline circulation The water pump and the biogas tank include a fermentation room, a biogas storage room and a water pressure room. The upper part of the fermentation room is connected to the feed inlet and the water pressure room, and the upper part of the fermentation room is connected to the biogas storage room. The equipment is connected to the biogas heating device, the water inlet of the biogas heating device is used to connect the cold water of the municipal pipe network, and the water outlet of the biogas heating device is used to connect the three-way valve of the water inlet of the biogas tank phase change heat storage tank; the water inlet of the biogas tank phase change heat storage tank On the one hand, the three-way valve is connected to the three-way valve of the water outlet of the phase change heat storage tank of the biogas digester through the phase change heat storage tank of the biogas digester; at the same time, the three-way valve of the water inlet of the phase change heat storage tank of the biogas digester is directly connected to the phase change heat storage tank of the biogas digester. The three-way valve of the water outlet is connected; the three-way valve of the water outlet of the phase change heat storage tank of the biogas digester is connected to the other water inlet of the water collector through the circulating water pump of the biogas digester pipeline.

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