Centralized hydrogen energy storage power station

Abstract

The utility model discloses a centralized hydrogen energy storage power station which mainly comprises an electrolysis unit, a hydrogen collection main tank, a mixed gas tank, a hydrogen split charging tank chamber, an oxygen split charging tank chamber and a power generation bin chamber, an exhaust pipe of each electrolytic cell is connected to a gas inlet connecting pipe of the corresponding gas separator, hydrogen exhaust pipes of all the gas separators are connected to a hydrogen collecting main tank in a centralized manner, and the hydrogen collecting main tank is connected with a hydrogen sub-packaging tank chamber; gas outlet pipes of all the gas separators are intensively connected into a mixed gas tank; the hydrogen subpackaging tank and the oxygen subpackaging tank are connected with the power generation bin for gas supply and power generation. According to the utility model, the electrolysis units do not interfere with each other, and each gas separator can separate most hydrogen from mixed gas, so that the subsequent compression separation efficiency is higher; hydrogen and oxygen are packaged in a plurality of hydrogen sub-packaging tanks and oxygen sub-packaging tanks, and overall power generation is not affected even if part of the hydrogen and the oxygen are abnormal. Therefore, the hydrogen separation device is high in hydrogen separation efficiency, high in combustion power generation efficiency and high in safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen energy storage power stations, and in particular relates to a centralized hydrogen energy storage power station. Background Art

[0002] Hydrogen energy storage power stations can play a role in peak shaving and valley filling and frequency regulation for the power grid. They can reduce load peaks, fill load valleys, reduce the peak-to-valley difference of the power grid load, balance power generation and power consumption, achieve efficient utilization of energy, and provide a broader development space for the development of photovoltaic and wind power. Hydrogen energy storage power stations can use abandoned photovoltaic and wind power to prepare hydrogen, and connect to the power grid through hydrogen energy conversion to electricity, and participate in the auxiliary service of power grid peak regulation. At present, the research on hydrogen energy storage technology mainly focuses on the single functional modules of hydrogen production and hydrogen storage. The construction of large-scale (such as 100 megawatt) hydrogen energy storage power stations has a large demand for hydrogen, so safety will be crucial. The water vapor mixed in the gas after electrolysis in the electrolyzer will affect the use of hydrogen and needs to be separated, and the hydrogen and oxygen mixture also needs to be separated. The mixed gas is directly discharged into the power generation warehouse for combustion and power generation. It is not flammable. Hydrogen needs to be separated, and then air or oxygen and hydrogen are mixed and ignited. According to the proportion adjustment, combustion power generation can be best achieved. It is difficult to completely separate the hydrogen and oxygen mixed by electrolysis by directly compressing them, and impure hydrogen will affect the efficiency of combustion and power generation. Most importantly, the storage of hydrogen in large hydrogen energy storage power stations will have safety hazards, and protective measures need to be designed to prevent large-scale explosions. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a centralized hydrogen energy storage power station with high hydrogen separation efficiency, high combustion power generation efficiency and high safety.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The centralized hydrogen energy storage power station mainly includes an electrolysis unit, a hydrogen collection tank, a mixed gas tank, a hydrogen sub-filling tank room, an oxygen sub-filling tank room and a power generation chamber; there are more than two electrolysis units, each of which is connected to a gas separator; each electrolysis unit has more than two electrolytic cells, the exhaust pipe of each electrolytic cell is connected to the air inlet pipe of the corresponding gas separator, the hydrogen exhaust pipes of all gas separators are centrally connected to the hydrogen collection tank, and the hydrogen collection tank is connected to the hydrogen sub-filling tank room; the outlet pipes of all gas separators are centrally connected to the mixed gas tank, and the mixed gas tank is connected to the hydrogen collection tank and the oxygen sub-filling tank room respectively through a compressor; there are more than two hydrogen sub-filling tanks, oxygen sub-filling tanks and power generation chambers in the hydrogen sub-filling tank room, the oxygen sub-filling tank room and the power generation chamber, respectively, and the hydrogen sub-filling tank and oxygen sub-tank are connected to the power generation chamber for gas supply and power generation.

[0006] The hydrogen tanks and oxygen tanks in the hydrogen tank room and the oxygen tank room are numbered one by one, and the hydrogen tanks and oxygen tanks with corresponding numbers will supply gas and generate electricity to the corresponding power generation compartment in the power generation compartment.

[0007] The hydrogen filling tank room is a sealed room filled with inert gas.

[0008] The gas separator is mainly composed of a box body and a negative pressure chamber, a separation chamber and a condensate chamber arranged inside the box body. A plurality of air inlet pipes with solenoid valves inserted into the separation chamber are arranged on the left side of the box body, and an air outlet pipe coming out of the separation chamber is arranged on the right side of the box body. A molecular separation plate is arranged near the top of the box body, the negative pressure chamber is above the molecular separation plate, the separation chamber is below, and a condensate chamber is arranged below the separation chamber. The negative pressure chamber is connected to the hydrogen exhaust pipe through a negative pressure pump and connected to the hydrogen collection tank.

[0009] The molecular separation plate has molecular pores distributed in a matrix.

[0010] The negative pressure chamber is divided into a plurality of negative pressure chambers by partitions, and each negative pressure chamber is connected to a hydrogen exhaust pipe via a negative pressure pump.

[0011] Condensation plates are evenly spaced on the lower surface of the molecular separation plate in the separation chamber, and matching baffles are evenly spaced at the bottom of the separation chamber, and the baffles are inserted between adjacent condensation plates.

[0012] The condensation plate includes a blocking plate and a side flow prevention triangular bar column; a plurality of side flow prevention triangular bars are arranged at equal intervals on the front side of the blocking plate, and side flow holes are arranged on both sides of the side flow prevention triangular bars; a through hole is arranged between the side flow prevention triangular bars and the blocking plate, and the side flow hole is communicated with the front end of the through hole.

[0013] The bottom wall of the separation chamber is evenly provided with leakage holes leading to the condensate chamber, and the bottom of the condensate chamber is provided with a drain pipe with a solenoid valve.

[0014] In view of the problems existing in the current hydrogen energy storage power stations, the inventors have designed a centralized hydrogen energy storage power station, which mainly includes an electrolysis unit, a hydrogen collection tank, a mixed gas tank, a hydrogen sub-filling tank room, an oxygen sub-filling tank room and a power generation chamber; there are more than two electrolysis units, and each electrolysis unit is connected to a gas separator; each electrolysis unit has more than two electrolytic cells, and the exhaust pipe of each electrolytic cell is connected to the air inlet pipe of the corresponding gas separator, and the hydrogen exhaust pipes of all gas separators are centrally connected to the hydrogen collection tank, which is in turn connected to the hydrogen sub-filling tank room; the outlet pipes of all gas separators are centrally connected to the mixed gas tank, and the mixed gas tank is respectively connected to the hydrogen collection tank and the oxygen sub-filling tank room through a compressor; there are more than two hydrogen sub-filling tanks, oxygen sub-filling tanks and power generation chambers in the hydrogen sub-filling tank room, the oxygen sub-filling tank room and the power generation chamber, respectively, and the hydrogen sub-filling tank and the oxygen sub-tank are connected to the power generation chamber for gas supply and power generation. In the present utility model, multiple electrolysis units are designed to ensure that each electrolysis unit does not interfere with each other, and the gas generated by electrolysis is not affected by the abnormality of a certain electrolysis unit. Each gas separator can separate the water vapor and most of the hydrogen from the electrolysis mixed gas, so that the subsequent compression and separation efficiency is higher; hydrogen and oxygen are packaged into multiple hydrogen sub-tanks and oxygen sub-tanks, and each power generation compartment in the power generation compartment is supplied with gas for combustion and power generation. Even if the gas supply of some tanks is abnormal and individual power generation compartments are abnormal, it will not affect the power generation of the entire power generation compartment. Moreover, the sub-packaged gas is safer and is not prone to large-scale explosion accidents. Therefore, the present utility model overcomes the problems of low efficiency in hydrogen separation, low efficiency in combustion power generation, and low safety in hydrogen storage in traditional hydrogen energy storage power stations, and is suitable for widespread promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structural distribution of the centralized hydrogen energy storage power station of the utility model.

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the gas separator in a centralized hydrogen energy storage power station.

[0017] Figure 3 yes Figure 2 Schematic diagram of the structure of the condensation plate in the gas separator.

[0018] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of the anti-side flow triangular column position in the condensation plate.

[0019] In the figure: 1. electrolytic cell; 2. gas separator; 20. box body; 21. air inlet pipe; 22. air outlet pipe; 23. molecular separation plate; 231. partition; 232. negative pressure chamber; 24. negative pressure pump; 25. hydrogen discharge pipe; 26. condensate chamber; 261. leakage hole; 262. discharge pipe; 27. baffle; 3. hydrogen collection tank; 4. mixed gas tank; 5. compressor; 6. hydrogen filling tank; 7. oxygen filling tank; 8. power generation chamber; 9. condensation plate; 91. blocking plate; 911. through-hole; 92. anti-side flow triangular bar column; 921. side flow hole. DETAILED DESCRIPTION

[0020] like Figures 1 to 4 As shown, the centralized hydrogen energy storage power station of the utility model mainly includes an electrolysis unit, a hydrogen collection tank, a mixed gas tank, a hydrogen filling tank room, an oxygen filling tank room and a power generation chamber.

[0021] There are more than two electrolysis units, each of which is connected to a gas separator 2; each electrolysis unit has more than two electrolytic cells 1, and the exhaust pipe of each electrolytic cell is connected to the air inlet pipe 21 of the corresponding gas separator, and the hydrogen exhaust pipes 25 of all gas separators centrally connect the hydrogen to the hydrogen collection tank 3, which is then connected to the hydrogen sub-tank room to compress the hydrogen and then pack it into the hydrogen sub-tank room; the outlet pipes of all gas separators centrally connect the oxygen mixed with a small amount of hydrogen to the mixed gas tank 4, and the mixed gas tank is respectively connected to the hydrogen collection tank and the oxygen sub-tank room through the compressor 5, and the mixed gas is compressed to separate hydrogen and oxygen, and the hydrogen flows back to the hydrogen collection tank, and the oxygen is compressed and packed into the oxygen sub-tank room.

[0022] The electrolytic cells are divided into units, that is, multiple electrolytic chambers are established, and multiple electrolytic cells are arranged in each electrolytic chamber (the room is not large, the safety is high, and the electrolysis accident rate is small). The gases electrolyzed by all the electrolytic cells in an electrolytic chamber are discharged into a gas separator. Each gas separator has multiple air inlet pipes, and the air inlet pipe is provided with a solenoid valve. After the solenoid valve is connected, the mixed gas flows through the gas separator to separate most of the hydrogen and water vapor at the condensation point. The separated hydrogen is first concentrated in the hydrogen collection tank, and the oxygen mixed with a small amount of hydrogen enters the mixed gas tank (if the water vapor is evaporated and then compressed and separated directly, the separation is not thorough, the compression and separation cost is high, and multiple compressions may be required). Since the oxygen mixed with a small amount of hydrogen is compressed by the compressor, after the hydrogen is separated, even if it still contains a small amount of hydrogen, it does not affect the subsequent gas supply and combustion.

[0023] There are more than two hydrogen sub-tanks 6, oxygen sub-tanks 7 and power generation chambers 8 in the hydrogen sub-tank room, oxygen sub-tank room and power generation chamber respectively. After each power generation chamber generates electricity, it is boosted by a booster station and then stored.

[0024] The gas is divided into small bottles of hydrogen tanks and oxygen tanks (one tank is enough for a power generation chamber to generate electricity for a day). It is highly safe and the power generation chambers can generate electricity in turns. When the gas in the hydrogen tank and the oxygen tank is gone, it needs to be refilled. If a large tank is used, power generation will stop when refilling.

[0025] The hydrogen tanks and oxygen tanks in the hydrogen tank room and oxygen tank room are numbered one by one, and the hydrogen tanks and oxygen tanks with corresponding numbers will supply gas to the corresponding power generation compartment in the power generation compartment to generate electricity. In this way, the corresponding tank body can be quickly found when the power generation compartment is abnormal, so as to quickly find the problem. Cross-flow power generation can be carried out. When one or several power generation compartments and their corresponding tank bodies are abnormal, power generation will not be interrupted, and others can generate electricity normally.

[0026] The gas separator is mainly composed of a box body 20 and a negative pressure chamber, a separation chamber, and a condensate chamber 26 arranged therein. A plurality of air inlet pipes with electromagnetic valves inserted into the separation chamber are arranged on the left side of the box body, and an air outlet pipe 22 from the separation chamber is arranged on the right side of the box body; a molecular separation plate 23 is arranged near the top of the box body, on which molecular pores are distributed in a matrix. The negative pressure chamber is located above the molecular separation plate, and the separation chamber is located below. A condensate chamber is arranged below the separation chamber; the negative pressure chamber is connected to the hydrogen collection tank through a negative pressure pump connected to a hydrogen discharge pipe. The negative pressure chamber is divided into a plurality of negative pressure chambers 232 by a partition 231, and each negative pressure chamber is connected to a hydrogen discharge pipe through a negative pressure pump 24 to discharge hydrogen into the hydrogen collection tank. Condensation plates 9 are arranged at equal intervals on the lower surface of the molecular separation plate in the separation chamber, and matching baffles 27 are arranged at equal intervals at the bottom of the separation chamber, and the baffles are inserted between adjacent condensation plates. The condensation plate includes a baffle plate 91 and a side flow prevention triangular bar column 92; a plurality of side flow prevention triangular bars are arranged at equal intervals on the front side of the baffle plate, and side flow holes 921 are arranged on both sides of the side flow prevention triangular bars; a through bar hole 911 is arranged between the side flow prevention triangular bars and the baffle plate, and the side flow holes are connected to the front end of the through bar hole. Leakage holes 261 leading to the condensate chamber are evenly arranged on the bottom wall of the separation chamber, and a drain pipe 262 with a solenoid valve is arranged at the bottom of the condensate chamber.

[0027] The electrolyzed mixed gas will enter the separation chamber from the air inlet pipe on the left side of the box body. Due to the negative pressure in the negative pressure chamber, the molecular separation plate can only pass hydrogen molecules, but not oxygen and water vapor. Most of the hydrogen is sucked into the negative pressure chamber by the negative pressure, and then connected to the hydrogen collection tank from the hydrogen exhaust pipe. The mixed gas will condense into water droplets when it flows through each condensation plate and flows down when it encounters the condensation plate, while the gas flowing from the bottom of the condensation plate will be deflected by the baffle plate and contact the condensation plate again. After multiple times, most of the water vapor will be condensed away. If the dehydration effect cannot be achieved, a drying process can be set up later. In order to ensure the negative pressure strength in multiple negative pressure chambers, multiple negative pressure pumps can be set to correspond to them, and the negative pressure effect is good. After being blocked by the condensation plate, the mixed gas flows to both sides and flows from the side flow strip hole to the through strip hole to the next condensation plate, further increasing the contact time with the condensation plate.

[0028] The hydrogen filling tank room is a sealed room filled with inert gas. Even if the gas leaks, there will be no explosion, and the gas will only leak to the outside. When repairing, workers need to wear oxygen tanks to enter the room for repair. There are spare oxygen tanks in the room to prevent the oxygen tanks from being unusable and putting workers in danger indoors.

Claims

1. A centralized hydrogen energy storage power station, characterized in that It mainly includes an electrolysis unit, a hydrogen collection tank, a mixed gas tank, a hydrogen sub-filling tank room, an oxygen sub-filling tank room and a power generation chamber; there are more than two electrolysis units, and each electrolysis unit is connected to a gas separator; each electrolysis unit has more than two electrolytic cells, and the exhaust pipe of each electrolytic cell is connected to the air inlet pipe of the corresponding gas separator, and the hydrogen exhaust pipes of all gas separators are centrally connected to the hydrogen collection tank, which is then connected to the hydrogen sub-filling tank room; the outlet pipes of all gas separators are centrally connected to the mixed gas tank, and the mixed gas tank is respectively connected to the hydrogen collection tank and the oxygen sub-filling tank room through a compressor; there are more than two hydrogen sub-filling tanks, oxygen sub-filling tanks and power generation chambers in the hydrogen sub-filling tank room, the oxygen sub-filling tank room and the power generation chamber, respectively, and the hydrogen sub-filling tank and the oxygen sub-tank are connected to the power generation chamber for gas supply and power generation.

2. The centralized hydrogen energy storage power station according to claim 1, characterized in that: The hydrogen sub-tanks and oxygen sub-tanks in the hydrogen sub-tank room and the oxygen sub-tank room are numbered one by one, and the hydrogen sub-tanks and oxygen sub-tanks with corresponding numbers will supply gas to the corresponding power generation compartment in the power generation compartment to generate electricity.

3. The centralized hydrogen energy storage power station according to claim 1, characterized in that: The hydrogen filling tank chamber is a sealed chamber filled with inert gas.

4. The centralized hydrogen energy storage power station according to claim 1, characterized in that: The gas separator is mainly composed of a box body and a negative pressure chamber, a separation chamber and a condensate chamber arranged therein. A plurality of air inlet pipes with solenoid valves inserted into the separation chamber are arranged on the left side of the box body, and an air outlet pipe coming out of the separation chamber is arranged on the right side of the box body. A molecular separation plate is arranged near the top of the box body, the negative pressure chamber is above the molecular separation plate, the separation chamber is below, and a condensate chamber is arranged below the separation chamber. The negative pressure chamber is connected to the hydrogen discharge pipe through a negative pressure pump and is connected to the hydrogen collection tank.

5. The centralized hydrogen energy storage power station according to claim 4 is characterized in that: The molecular separation plate is provided with molecular pores distributed in a matrix.

6. The centralized hydrogen energy storage power station according to claim 4, characterized in that: The negative pressure chamber is divided into a plurality of negative pressure chambers by a partition, and each negative pressure chamber is connected to a hydrogen exhaust pipe via a negative pressure pump.

7. The centralized hydrogen energy storage power station according to claim 4, characterized in that: Condensation plates are evenly spaced on the lower surface of the molecular separation plate in the separation chamber, and matching baffles are evenly spaced on the bottom of the separation chamber, and the baffles are inserted between adjacent condensation plates.

8. The centralized hydrogen energy storage power station according to claim 7, characterized in that: The condensation plate includes a blocking plate and anti-side flow triangular bars; a plurality of anti-side flow triangular bars are arranged at equal intervals on the front side of the blocking plate, and side flow holes are arranged on both sides of the anti-side flow triangular bars; a through hole is arranged inside the anti-side flow triangular bars and between the blocking plate, and the side flow hole is communicated with the front end of the through hole.

9. The centralized hydrogen energy storage power station according to claim 8, characterized in that: The bottom wall of the separation chamber is evenly provided with leakage holes leading to the condensate chamber, and the bottom of the condensate chamber is provided with a drain pipe with a solenoid valve.

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