Hydrogen-doped natural gas separation and purification device for fuel gas user side

Abstract

The invention discloses a hydrogen-doped natural gas separation and purification device for a gas user side, and belongs to the technical field of gas separation. The hydrogen-doped natural gas separation and purification device comprises a separation membrane assembly, a fuel cell assembly, a natural gas pipeline, a heat transmission network pipe and a power transmission network; a first gas inlet of the separation membrane assembly is used for introducing hydrogen-doped natural gas, a first output port is butted with a natural gas pipeline, and a second output port is butted with a second gas inlet of the fuel cell assembly; a second gas inlet of the fuel cell assembly is used for accessing hydrogen transmitted by the separation membrane assembly, a third gas inlet is used for accessing oxygen, a water outlet is used for discharging reacted wastewater, a circuit connector is butted with a power transmission network, and a heat supply network interface is butted with a heat transmission network pipe; according to the device, hydrogen energy can be used for meeting electric power and thermal power requirements instead of being only converted into heat energy originally, the hydrogen energy can be used when needed, and energy is provided in a peak shifting mode; the problem that hydrogen-doped natural gas is not matched with a gas cooker in a traditional method is solved, residents do not need to modify the cooker, and the modification cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas separation, and in particular to a hydrogen-blended natural gas separation and purification device for a gas user end. Background Art

[0002] Currently, the primary method for using hydrogen-blended natural gas in residential areas is direct combustion in appliances such as gas stoves and wall-mounted boilers. This method is considered a key path to achieving "hydrogen in every household." Hydrogen-blended natural gas is delivered to end users via natural gas pipelines, where it can be consumed directly without any additional processing or conversion. Direct combustion of hydrogen-blended natural gas generates heat for use in industries, buildings, or residential heating. Within a certain range of hydrogen blending ratios, existing natural gas burners can operate with hydrogen-blended natural gas without major modification, making its application more convenient.

[0003] The above utilization methods are primarily limited by the following factors: First, they are limited by factors such as the immaturity of hydrogen-blended combustion equipment, the lack of corresponding laws, regulations, and standards, and the high cost of hydrogen. To achieve large-scale application of hydrogen-blended natural gas, it is necessary to develop hydrogen-blended natural gas combustion equipment, industrial boilers, gas turbines, and other equipment suitable for different hydrogen blending ratios. Furthermore, relevant laws, regulations, and standards are also needed to ensure the safe use of hydrogen-blended natural gas. Second, the hydrogen contained in hydrogen-blended natural gas cannot be effectively utilized. The heat energy generated by the combustion of hydrogen with hydrocarbons such as methane in natural gas may not be fully utilized. In contrast, purifying hydrogen and using it in fuel cells directly converts its chemical energy into electricity, generating both electricity and heat, improving energy efficiency.

[0004] Therefore, it is necessary to propose a new method for utilizing hydrogen-blended natural gas in residential areas. Summary of the Invention

[0005] The present invention is intended to provide a hydrogen-blended natural gas separation and purification device for use at a gas user end, in order to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A hydrogen-blended natural gas separation and purification device for gas user terminals, comprising a separation membrane assembly, a fuel cell assembly, a natural gas pipeline, a heat transmission network, and a power transmission network;

[0008] The separation membrane assembly comprises a separation membrane body, wherein the separation membrane body is provided with a first air inlet, a first air outlet, and a second air outlet;

[0009] The fuel cell assembly includes a hydrogen fuel cell working body, which is provided with a second air inlet, a third air inlet, a drain port, a circuit connector and a heat network interface;

[0010] The first air inlet of the separation membrane assembly is used to connect to the hydrogen-blended natural gas, the first air outlet is connected to the natural gas pipeline, and the second air outlet is connected to the second air inlet of the fuel cell assembly;

[0011] The second air inlet of the fuel cell assembly is used to receive hydrogen transmitted from the separation membrane assembly, the third air inlet is used to receive oxygen, the drain port is used to discharge waste water after the reaction, the circuit connector is connected to the power transmission network, and the heat network interface is connected to the heat transmission network pipe.

[0012] Preferably, the fuel cell assembly further comprises an intelligent hydrogen storage device, and the intelligent hydrogen storage device is arranged at the second air inlet of the fuel cell assembly;

[0013] The intelligent hydrogen storage device includes a hydrogen storage bottle and an intelligent control interface, which is provided at the second output port and can control the flow rate and flow of hydrogen;

[0014] Preferably, the intelligent control interface is provided with a monitoring module to monitor leakage problems during hydrogen circulation.

[0015] Preferably, the hydrogen storage bottle is a hydrogen storage bottle fully wrapped with carbon fiber.

[0016] Preferably, the main body of the separation membrane is a multi-stage separation membrane structure, and the main body is also provided with an intelligent control module, which can detect the concentration of separated hydrogen and control the next-stage separation membrane to perform secondary hydrogen separation when the concentration of hydrogen separated by the previous-stage separation membrane of the main body is insufficient.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention converts hydrogen energy from being only convertible into thermal energy to being used to meet electricity and heat demand, and can be used when needed, thus achieving staggered energy supply.

[0019] The present invention further solves the problem of mismatch between hydrogen-blended natural gas and gas stoves in the original method, and residents do not need to modify their stoves, thus saving modification costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a hydrogen-blended natural gas separation and purification device used at the gas user end.

[0021] The reference numerals in the drawings of the specification include:

[0022] 1. Membrane separation assembly; 101. First air inlet; 102. First air outlet; 103. Second air outlet; 2. Fuel cell assembly; 201. Hydrogen fuel cell working body; 201a. Hydrogen storage bottle; 201b. Intelligent control interface; 202. Second air inlet; 203. Third air inlet; 204. Drain; 205. Circuit connector; 206. Heat network interface; 3. Natural gas pipeline; 4. Heat transmission network pipe; 5. Power transmission network. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0024] The specific implementation process is as follows:

[0025] like Figure 1 As shown, a hydrogen-blended natural gas separation and purification device for gas user ends includes a separation membrane assembly 1, a fuel cell assembly 2, a natural gas pipeline 3, a heat transmission network pipe 4, and a power transmission network 5.

[0026] The separation membrane assembly 1 includes a separation membrane body, on which a first air inlet 101 , a first air outlet 102 and a second air outlet 103 are provided.

[0027] The fuel cell assembly 2 includes a hydrogen fuel cell working body 201 , on which a second air inlet 202 , a third air inlet 203 , a water outlet 204 , a circuit connector 205 and a heat network interface 206 are provided.

[0028] The first air inlet 101 of the separation membrane assembly 1 is used to connect to the hydrogen-blended natural gas, the first output port 102 is connected to the natural gas pipeline 3, and is used to transmit the separated natural gas to the household gas equipment through the natural gas pipeline 3, and the second output port 103 is connected to the second air inlet 202 of the fuel cell assembly 2, and is used to transmit the separated hydrogen to the hydrogen fuel cell working body 201.

[0029] The second air inlet 202 of the fuel cell assembly 2 is used to connect the hydrogen transmitted from the separation membrane assembly 1, the third air inlet 203 is used to connect the oxygen to help the hydrogen fuel cell working body 201 operate, the drain outlet 204 is used to discharge the waste water after the reaction, the circuit connector 205 is connected to the power transmission network 5, and is used to transmit the electric energy produced by the hydrogen fuel cell working body 201 to household appliances through the power transmission network 5, and the heat network interface 206 is connected to the heat transmission network pipe 4, and is used to transmit the heat energy generated by the hydrogen fuel cell working body 201 to household heating equipment through the heat transmission network pipe 4.

[0030] The fuel cell assembly 2 further includes an intelligent hydrogen storage device, which is disposed at the second air inlet 202 of the fuel cell assembly 2;

[0031] The intelligent hydrogen storage device includes a hydrogen storage bottle 201a and an intelligent control interface 201b. The intelligent control interface 201b is provided on the hydrogen storage bottle 201a and connects to the second output port 103 and the second inlet port 202, respectively, to control the flow rate and volume of hydrogen. The hydrogen storage bottle 201a is a fully carbon fiber wrapped hydrogen storage bottle. This structure ensures stable and safe hydrogen storage.

[0032] The intelligent control interface 201b is provided with a monitoring module, which can monitor the leakage of hydrogen during circulation, thereby ensuring safety during use.

[0033] The main body of the separation membrane is a multi-stage separation membrane structure, and an intelligent control module is also provided on the main body. Usually, the hydrogen concentration required for hydrogen fuel cells is 99.97% pure hydrogen. The concentration of separated hydrogen can be detected by the intelligent control module. When the hydrogen concentration separated by the first separation membrane on the main body of the separation membrane is insufficient, the next separation membrane is controlled to perform secondary hydrogen separation, thereby ensuring that the hydrogen concentration after separation meets the requirements of subsequent hydrogen fuel cells.

[0034] The above is only an embodiment of the present invention, and common knowledge such as the specific technical solutions and / or characteristics in the solution is not described in detail. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the technical solution of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A hydrogen-blended natural gas separation and purification device for gas user terminals, characterized by: It includes a separation membrane assembly (1), a fuel cell assembly (2), a natural gas pipeline (3), a heat transmission network pipe (4), and a power transmission network (5); The separation membrane assembly (1) comprises a separation membrane body, wherein the separation membrane body is provided with a first air inlet (101), a first air outlet (102) and a second air outlet (103); The fuel cell assembly (2) comprises a hydrogen fuel cell working body (201), and the hydrogen fuel cell working body (201) is provided with a second air inlet (202), a third air inlet (203), a water outlet (204), a circuit connector (205), and a heat network interface (206); The first air inlet (101) of the separation membrane assembly (1) is used to receive hydrogen-doped natural gas, the first air outlet (102) is connected to a natural gas pipeline (3), and the second air outlet (103) is connected to a second air inlet (202) of the fuel cell assembly (2); The second air inlet (202) of the fuel cell assembly (2) is used to receive hydrogen transmitted from the separation membrane assembly (1), the third air inlet (203) is used to receive oxygen, the drain outlet (204) is used to discharge waste water after the reaction, the circuit connector (205) is connected to the power transmission network (5), and the heat network interface (206) is connected to the heat transmission network pipe (4).

2. The hydrogen-blended natural gas separation and purification device for a gas user according to claim 1, characterized in that: The fuel cell assembly (2) further comprises an intelligent hydrogen storage device, wherein the intelligent hydrogen storage device is arranged at the second air inlet (202) of the fuel cell assembly (2); The intelligent hydrogen storage device comprises a hydrogen storage bottle (201a) and an intelligent control interface (201b); the intelligent control interface (201b) is arranged at the second output port (103) and can control the flow rate and flow of hydrogen.

3. The hydrogen-blended natural gas separation and purification device for a gas user according to claim 2, characterized in that: The intelligent control interface (201b) is provided with a monitoring module, which can monitor leakage problems during hydrogen circulation.

4. The hydrogen-blended natural gas separation and purification device for a gas user according to claim 2, characterized in that: The hydrogen storage bottle (201a) is a hydrogen storage bottle fully wrapped with carbon fiber.

5. The hydrogen-blended natural gas separation and purification device for a gas user according to claim 1, characterized in that: The separation membrane body is a multi-stage separation membrane structure, and is also provided with an intelligent control module. The intelligent control module can detect the concentration of separated hydrogen and control the next-stage separation membrane to perform secondary hydrogen separation when the concentration of hydrogen separated by the previous-stage separation membrane of the separation membrane body is insufficient.

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