阅读说明：本技术 一种水电站加压储氢、减压输氢发电装置 (Power station pressurization hydrogen storage and decompression hydrogen transmission power generation device ) 是由 桂绍波 李玲 刘景旺 梁波 郑涛平 胡定辉 邹海青 于 2019-09-30 设计创作，主要内容包括：本发明涉及水电制氢技术领域,具体涉及一种水电站加压储氢、减压输氢发电装置。包括电解槽、氢气收集装置、氢气加压装置、第一电磁阀、高压氢气储气罐、减压保护装置、燃料电池电堆和高压储气控制系统,高压储气控制系统的压力信号输入端与高压氢气储气罐连接,控制信号输出端与电解槽和第一电磁阀电连接,电解槽的进水口通过水泵与水电站内存储水连通,氢气收集装置的出口经氢气加压装置和第一电磁阀与高压氢气储气罐入口连接,高压氢气储气罐出口经减压保护装置与燃料电池电堆连接。本装置为水电站水电解制氢、加压储氢和减压输氢发电系统提供了安全有效的氢气传输方式,对氢气能源在水电站中推广应用具有重要意义。(The invention relates to the technical field of hydroelectric hydrogen production, in particular to a hydropower station hydrogen storage under pressure and hydrogen transmission under reduced pressure power generation device. The hydrogen storage device comprises an electrolytic cell, a hydrogen collecting device, a hydrogen pressurizing device, a first electromagnetic valve, a high-pressure hydrogen storage tank, a pressure reduction protection device, a fuel cell stack and a high-pressure gas storage control system, wherein a pressure signal input end of the high-pressure gas storage control system is connected with the high-pressure hydrogen storage tank, a control signal output end of the high-pressure gas storage control system is electrically connected with the electrolytic cell and the first electromagnetic valve, a water inlet of the electrolytic cell is communicated with a water storage in a hydropower station through a water pump, an outlet of the hydrogen collecting device is connected with an inlet of the high-pressure hydrogen storage tank through the hydrogen pressurizing device and the first electromagnetic valve, and. The device provides a safe and effective hydrogen transmission mode for a hydropower station water electrolysis hydrogen production, pressurized hydrogen storage and pressure reduction hydrogen transmission power generation system, and has important significance for popularization and application of hydrogen energy in the hydropower station.)

1. A hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device is characterized in that: comprises an electrolytic tank (1.3), a hydrogen collecting device (1.2), a hydrogen pressurizing device (2), a first electromagnetic valve (3), a high-pressure hydrogen storage tank (5), a pressure reduction protection device (6), a fuel cell pile (7) and a high-pressure storage control system (8), wherein the pressure signal input end of the high-pressure storage control system (8) is electrically connected with the pressure signal output end of the high-pressure hydrogen storage tank (5), the control signal output end of the high-pressure storage control system (8) is electrically connected with the control signal input ends of the electrolytic tank (1.3) and the first electromagnetic valve (3), the water inlet of the electrolytic tank (1.3) is communicated with the internal storage of a hydropower station through a water pump, the hydrogen outlet end of the electrolytic tank (1.3) is connected with the inlet of the hydrogen collecting device (1.2), the outlet of the hydrogen collecting device (1.2) is connected with the inlet of the high-pressure hydrogen storage tank (5) through the hydrogen pressurizing device (2) and the first electromagnetic valve, the outlet of the high-pressure hydrogen storage tank (5) is connected with a fuel cell stack (7) through a decompression protection device (6).

2. The hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to claim 1, wherein: the hydrogen pressurizing device (2) comprises a main pressurizing device and an auxiliary pressurizing device with the same structure, wherein the main pressurizing device and the auxiliary pressurizing device respectively comprise a compressor unit (2.1) and a first one-way valve (2.2), one end of the compressor unit (2.1) is connected with an outlet of the hydrogen collecting device (1.2), the other end of the compressor unit is connected with one end of the first one-way valve (2.2), and the other end of the first one-way valve (2.2) is connected with the high-pressure hydrogen storage tank (5).

3. The hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to claim 1, wherein: when the main pressurizing device is normal, the front end and the rear end of the main pressurizing device are respectively communicated with the hydrogen collecting device (1.2) and the high-pressure hydrogen storage tank (5), and when the main pressurizing device fails, the front end and the rear end of the auxiliary pressurizing device are respectively communicated with the hydrogen collecting device (1.2) and the high-pressure hydrogen storage tank (5) when the auxiliary pressurizing device fails.

4. the hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to claim 2, wherein: the compressor unit (2.1) is formed by connecting one or more compressors in series.

5. The hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to claim 1, wherein: and a hydrogen cooling and drying machine (4) for drying the hydrogen is arranged between the hydrogen pressurizing device (2) and the high-pressure hydrogen storage tank (5).

6. The hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to claim 1, wherein: decompression protection device (6) include intelligent feedback device (6.4) and second solenoid valve (6.1), second check valve (6.2) and decompression valves (6.3) that establish ties in proper order, the pressure signal input of intelligent feedback device (6.4) and decompression valves (6.3) go out the gas piping connection, the control signal output of intelligent feedback device (6.4) is connected with the control signal input electricity of second solenoid valve (6.1).

7. The hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to claim 6, wherein: the pressure reducing valve group (6.3) is formed by connecting one or more pressure reducing valves in series.

8. The hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to claim 1, wherein: the oxygen outlet end of the electrolytic cell (1.3) is also connected with an oxygen collecting device (1.1).

Technical Field

The invention relates to the technical field of hydroelectric hydrogen production, in particular to a hydropower station hydrogen storage under pressure and hydrogen transmission under reduced pressure power generation device.

Background

China has abundant water resources, and hydropower construction achieves the remarkable achievement, so that the economic and social benefits are remarkable, but certain problems which cannot be ignored exist. If the electricity load of the power transmission area of part of water power stations is not coordinated with natural runoff, the water abandoning phenomenon of the power stations in the flood season is serious, and the electricity quantity of the water abandoning in Sichuan is up to 350 hundred million kilowatts in 2020 by incomplete estimation, and the Sichuan water and electricity are under huge absorption pressure.

In recent years, research on the hydrogen production technology by water electrolysis is more and more paid attention and supported worldwide, and China also develops hydrogen energy as a strategic target of new energy in the 21 st century. The hydropower station has abundant water resources, so that hydrogen is produced by electrolysis of the hydropower station, the problem of water and electricity consumption when electric power is surplus can be effectively solved, and the method is also an important measure for improving the utilization rate of the water resources, converting the energy consumption structure of China and relieving haze.

The water electrolysis hydrogen production system can be divided into a normal-pressure water electrolysis hydrogen production system (the hydrogen pressure p is less than 0.1MPa), a low-pressure water electrolysis hydrogen production system (the hydrogen pressure p is more than or equal to 0.1MPa and less than 1.6MPa) and a medium-pressure water electrolysis hydrogen production system (the hydrogen pressure p is more than or equal to 1.6MPa and less than 10.0MPa) according to different working conditions. The hydrogen pressure required by the fuel cell stack for power generation is 0.1-0.3 MPa. Because the density of hydrogen is very small and the hydrogen is flammable and explosive, in order to simultaneously improve the hydrogen yield of the hydropower station for hydrogen production by water electrolysis and the generating capacity of a fuel cell stack, a safe and reliable scheme of a series of procedures of hydrogen high-pressure storage and pressure-reducing transmission power generation needs to be formulated according to the working conditions of different water electrolysis hydrogen production systems.

Disclosure of Invention

The invention aims to provide a safe and reliable hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device, which can improve the utilization rate of water resources of the hydropower station aiming at the defects of the prior art.

The invention relates to a hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device, which adopts the technical scheme that: the hydrogen storage device comprises an electrolytic cell, a hydrogen collecting device, a hydrogen pressurizing device, a first electromagnetic valve, a high-pressure hydrogen storage tank, a pressure reduction protection device, a fuel cell stack and a high-pressure gas storage control system, wherein a pressure signal input end of the high-pressure gas storage control system is electrically connected with a pressure signal output end of the high-pressure hydrogen storage tank, a control signal output end of the high-pressure gas storage control system is electrically connected with a control signal input end of the electrolytic cell and a control signal input end of the first electromagnetic valve, a water inlet of the electrolytic cell is communicated with a water storage in a hydropower station memory through a water pump, a hydrogen gas outlet end of the electrolytic cell is connected with an inlet of the hydrogen collecting device, an outlet of the hydrogen collecting device is connected with an inlet of the high-pressure hydrogen storage tank through the hydrogen pressurizing.

it is comparatively preferred, hydrogen pressure device includes main pressure device and the vice pressure device that the structure is the same, main pressure device, vice pressure device all include compressor unit and first check valve, compressor unit one end and hydrogen collection device exit linkage, the other end is connected with first check valve one end, the first check valve other end and high-pressure hydrogen gas storage tank connection.

Preferably, when the main pressurizing device is normal, the front end and the rear end of the main pressurizing device are respectively communicated with the hydrogen collecting device and the high-pressure hydrogen storage tank, and when the main pressurizing device fails, the front end and the rear end of the auxiliary pressurizing device are respectively communicated with the hydrogen collecting device and the high-pressure hydrogen storage tank.

Preferably, the compressor unit is formed by connecting one or more compressors in series.

Preferably, a hydrogen cooling and drying machine for drying hydrogen is arranged between the hydrogen pressurizing device and the high-pressure hydrogen storage tank.

Preferably, the pressure reduction protection device comprises an intelligent feedback device, and a second electromagnetic valve, a second check valve and a pressure reduction valve bank which are sequentially connected in series, wherein a pressure signal input end of the intelligent feedback device is connected with an air outlet pipeline of the pressure reduction valve bank, and a control signal output end of the intelligent feedback device is electrically connected with a control signal input end of the second electromagnetic valve.

Preferably, the pressure reducing valve group is formed by connecting one or more pressure reducing valves in series.

Preferably, the oxygen outlet end of the electrolytic cell is further connected with an oxygen collecting device.

The invention has the beneficial effects that:

(1) The device provides a safe and effective hydrogen transmission mode for a hydropower station water electrolysis hydrogen production, pressurized hydrogen storage and pressure reduction hydrogen transmission power generation system, has important significance for popularization and application of hydrogen energy in the hydropower station, and can be widely applied to the technical field of water conservancy and hydropower engineering.

(2) The device improves the utilization rate of water resources of the hydropower station and the generating potential, reduces the water abandonment of the hydropower station, and is an important measure for effectively solving the problem of water and electricity consumption when the electric power is surplus, converting the energy consumption structure of China and relieving haze.

(3) By arranging the high-pressure hydrogen storage control system and the pressure reduction protection device, when the system pressure exceeds a set protection value due to failure of the one-stage or multi-stage pressure reduction valve bank in the pressure hydrogen transmission system or other reasons, the pressure reduction and protection device can quickly close the electromagnetic valve, so that the safety of a fuel cell stack and the system is protected, and the safety of the pressure reduction hydrogen transmission power generation system of the hydropower station is improved. The high-pressure hydrogen storage control system can control the start and stop of an electrolytic cell and a compressor unit in the water electrolysis hydrogen production device according to the hydrogen pressure in the high-pressure hydrogen storage tank, and further improves the safety level of hydrogen transportation.

Drawings

FIG. 1 is a schematic diagram of a hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device according to the invention;

In the figure: 1-water electrolysis hydrogen production device, 1.1-oxygen collection device, 1.2-hydrogen collection device, 1.3-electrolytic tank, 2-hydrogen pressurization device, 2.1-compressor set, 2.2-first one-way valve, 3-first electromagnetic valve, 4-hydrogen cooling drying machine, 5-high pressure hydrogen storage tank, 6-decompression protection device, 6.1-second electromagnetic valve, 6.2-second one-way valve, 6.3-decompression valve group, 6.4-intelligent feedback device, 7-fuel cell pile, 8-high pressure hydrogen storage control system.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.

As shown in fig. 1, a hydropower station hydrogen storage under pressure and hydrogen output under reduced pressure power generation device mainly comprises a water electrolysis hydrogen production device 1, a hydrogen pressure device 2, a first electromagnetic valve 3, a high-pressure hydrogen storage tank 5, a pressure reduction protection device 6, a fuel cell stack 7 and a high-pressure storage control system 8. The water electrolysis hydrogen production device 1 comprises an oxygen collecting device 1.1, a hydrogen collecting device 1.2 and an electrolytic bath 1.3.

The hydrogen pressurizing device 2 comprises a main pressurizing device and an auxiliary pressurizing device with the same structure, the main pressurizing device and the auxiliary pressurizing device respectively comprise a compressor set 2.1 and a first one-way valve 2.2, one end of the compressor set 2.1 is connected with the outlet of the hydrogen collecting device 1.2, the other end of the compressor set is connected with one end of the first one-way valve 2.2, and the other end of the first one-way valve 2.2 is connected with the high-pressure hydrogen storage tank 5. The main pressurizing device and the auxiliary pressurizing device are switched to be used, specifically, when the main pressurizing device is normal, the front end and the rear end of the main pressurizing device are respectively communicated with the hydrogen collecting device 1.2 and the high-pressure hydrogen storage tank 5, and when the main pressurizing device fails, the front end and the rear end of the auxiliary pressurizing device are respectively communicated with the hydrogen collecting device 1.2 and the high-pressure hydrogen storage tank 5. Wherein, the compressor unit 2.1 is formed by connecting one or more compressors in series. The water inlet of the electrolytic cell 1.3 is communicated with the water stored in the hydropower station through a water pump, the hydrogen gas outlet end of the electrolytic cell 1.3 is connected with the inlet of a hydrogen gas collecting device 1.2, the outlet of the hydrogen gas collecting device 1.2 is connected with the inlet of a high-pressure hydrogen gas storage tank 5 through a hydrogen gas pressurizing device 2 and a first electromagnetic valve 3, and the outlet of the high-pressure hydrogen gas storage tank 5 is connected with a fuel cell stack 7 through a pressure reduction protection device 6.

The pressure signal input end of the high-pressure gas storage control system 8 is electrically connected with the pressure signal output end of the high-pressure hydrogen gas storage tank 5, and the control signal output end of the high-pressure gas storage control system 8 is electrically connected with the control signal input ends of the electrolytic tank 1.3 and the first electromagnetic valve 3. The high-pressure hydrogen storage control system 8 can control the start and stop of the electrolytic tank 1.3 and the compressor unit 2.1 through monitoring the hydrogen pressure in the high-pressure hydrogen storage tank 5, and is provided with high-pressure and low-pressure alarm functions. A pressure sensor can be arranged in the high-pressure hydrogen storage tank 5, a pressure signal in the tank is detected through the pressure sensor, and the signal is sent to the high-pressure hydrogen storage control system 8, so that the monitoring of the pressure of the hydrogen in the tank is realized. A hydrogen cooling dryer 4 for drying the hydrogen is arranged between the hydrogen pressurizing device 2 and the high-pressure hydrogen storage tank 5.

The pressure reduction protection device 6 comprises an intelligent feedback device 6.4, a second electromagnetic valve 6.1, a second one-way valve 6.2 and a pressure reduction valve bank 6.3 which are sequentially connected in series, and the pressure reduction valve bank 6.3 is formed by connecting one or more pressure reduction valves in series. The pressure signal input end of the intelligent feedback device 6.4 is connected with the air outlet pipeline of the pressure reducing valve group 6.3, and the control signal output end of the intelligent feedback device 6.4 is electrically connected with the control signal input end of the second electromagnetic valve 6.1. When the pressure reducing valve group 6.3 fails or the system pressure exceeds a setting protection value due to other reasons, the intelligent feedback device 6.4 can rapidly close the second electromagnetic valve 6.1, so that the fuel cell stack 7 and the system safety are protected.

Details not described in this specification are within the skill of the art that are well known to those skilled in the art.