Search

CN-121992452-A - Device and method for improving cold start speed of alkaline electro-hydrogen production equipment system

CN121992452ACN 121992452 ACN121992452 ACN 121992452ACN-121992452-A

Abstract

The application relates to a device for improving the cold start speed of an alkaline electric hydrogen production equipment system, which relates to the field of electrolytic water hydrogen production technical equipment and comprises a liquid inlet component, wherein a liquid outlet end of the liquid inlet component is connected with an acceleration component, a liquid outlet end of the acceleration component is connected with an electrolytic tank, the liquid outlet end of the electrolytic tank is communicated with the liquid inlet component, the acceleration component comprises an acceleration box, and a temperature rising component is arranged in the acceleration box. The application has the advantages of greatly improving the cold start speed of the alkaline water electrolysis hydrogen production equipment system, reducing the cold start time from an hour level to a minute level, improving the response speed of the electric hydrogen production equipment system to the fluctuation working condition, and enhancing the adaptability and the flexibility of the electric hydrogen production equipment in the renewable energy power generation system.

Inventors

  • Huang Danji
  • Huang Hongjiao
  • CHEN MING
  • HUANG PENGHUI
  • ZHOU WEI
  • Min Luofu

Assignees

  • 中石油深圳新能源研究院有限公司
  • 中国石油天然气股份有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (20)

  1. 1. The cold start speed device for the alkaline electric hydrogen production equipment system is characterized by comprising a liquid inlet component (1), wherein a liquid outlet end of the liquid inlet component (1) is connected with an acceleration component (2), a liquid outlet end of the acceleration component (2) is connected with an electrolytic tank (3), a liquid outlet end of the electrolytic tank (3) is communicated with the liquid inlet component (1), the acceleration component (2) comprises an acceleration box (211), and a temperature rising component (21) is arranged in the acceleration box (211).
  2. 2. The cold start-up speed device for an alkaline electro-hydrogen plant system according to claim 1, wherein said temperature increasing means (21) comprises a heater (212), said heater (212) is located inside said acceleration tank (211), and said heater (212) increases the temperature of the medium inside said acceleration tank (211).
  3. 3. The device for improving cold start speed of alkaline electric hydrogen production equipment system according to claim 2, wherein the heater (212) comprises an electric heating wire, the electric heating wire surrounds the side wall of the acceleration box (211), and a control part for controlling heating power of the electric heating wire is arranged on one side of the electric heating wire.
  4. 4. The cold start-up speed device for an alkaline electro-hydrogen plant system according to claim 2, wherein a heat insulating member is provided outside the acceleration tank (211), and the heat insulating member completely wraps the side wall of the acceleration tank (211).
  5. 5. The cold start-up speed device for an alkaline electro-hydrogen plant system according to claim 2, wherein the accelerating assembly (2) further comprises a first accelerating pipe (22) and a second accelerating pipe (23), the first accelerating pipe (22) is opposite to the accelerating box (211), the first accelerating pipe (22) communicates a liquid inlet end of the accelerating box (211) with the liquid inlet assembly (1), the first accelerating pipe (22) communicates a liquid outlet end of the accelerating box (211) with the electrolytic tank (3), and the second accelerating pipe (23) communicates the liquid inlet assembly (1) with the electrolytic tank (3).
  6. 6. The cold start-up speed device for an alkaline electro-hydrogen plant system according to claim 5, wherein the first accelerating pipeline (22) comprises a liquid inlet part (221), a liquid inlet end of the liquid inlet part (221) is communicated with the liquid inlet component (1), a liquid outlet end of the liquid inlet part (221) is communicated with the accelerating box (211), a liquid outlet end of the accelerating box (211) is provided with a liquid outlet part (222), and a liquid outlet end of the liquid outlet part (222) is communicated with the electrolytic tank (3).
  7. 7. The cold start speed device for an alkaline electro-hydrogen plant system according to claim 6, wherein the liquid inlet portion (221) is fixedly connected with a first opening adjusting valve (24), and the liquid outlet portion (222) is fixedly connected with a second opening adjusting valve (25).
  8. 8. The cold start-up speed device for an alkaline electro-hydrogen plant system according to claim 5, wherein a third opening regulating valve (26) is fixedly connected to the second accelerating pipeline (23).
  9. 9. The device for improving the cold start speed of an alkaline electric hydrogen production equipment system according to claim 1, wherein the electrolytic tank (3) comprises an electrolytic tank body, a hydrogen liquid separation part (31) and an oxygen liquid separation part (32) are arranged on the electrolytic tank body, and the hydrogen liquid separation part (31) is communicated with a liquid outlet end of the oxygen liquid separation part (32) relatively and is communicated with the liquid inlet assembly (1).
  10. 10. The cold start speed device for an alkaline electro-hydrogen plant system of claim 9, wherein the liquid outlet end of the electrolytic tank (3) is fixedly connected with an alkaline pump (4), and the alkaline pump (4) pumps the liquid at the liquid outlet end of the electrolytic tank (3) into the liquid inlet assembly (1).
  11. 11. The cold start-up speed device for an alkaline electro-hydrogen production equipment system according to claim 9, wherein a hydrogen collecting part and a first alkaline liquid pipeline (311) are fixedly connected to the hydrogen-liquid separating part (31), an oxygen collecting part and a second alkaline liquid pipeline (321) are fixedly connected to the oxygen-liquid separating part (32), the first alkaline liquid pipeline (311) and the second alkaline liquid pipeline (321) are communicated, and the first alkaline liquid pipeline (311) and the second alkaline liquid pipeline (321) are communicated with the liquid inlet assembly (1).
  12. 12. The cold start speed device for an alkaline electro-hydrogen production equipment system according to claim 1, wherein the liquid inlet assembly (1) comprises an alkali liquid tank (11), a liquid inlet is formed in one side of the alkali liquid tank (11), and one side of the alkali liquid tank (11) is communicated with a liquid outlet end of the electrolytic tank (3).
  13. 13. A method for increasing cold start-up speed, applied to the system cold start-up speed device for increasing alkaline electrohydrogen plant of any one of claims 1 to 12, said method comprising: S01, intensively heating electrolyte in an acceleration box (211), and judging whether the liquid level of the acceleration box (211) reaches a set value after equipment is started; S02, a heater (212) operates at low power, hydrogen production equipment is started, after reaction starts, the temperature of an accelerating assembly (2) is maintained at a power supply to operate at low power, the rest of power is distributed to an electrolytic tank (3) to react, a first opening regulating valve (24) and a second opening regulating valve (25) are opened, and the opening of the first opening regulating valve (24), the second opening regulating valve (25) and a third opening regulating valve (26) are regulated; S03, the power of the accelerating assembly (2) is reset to zero, and the steady state operation is that the temperature of the electrolyte is increased, and the power of the heating device is reduced; And S04, stopping the machine for heat preservation, namely closing the second opening regulating valve (25) when the electric hydrogen production equipment system is stopped, and closing the first opening regulating valve (24) after the storage tank of the accelerating assembly (2) is filled with electrolyte.
  14. 14. The method for increasing a cold start speed according to claim 13, wherein in S01, when the liquid level in the acceleration tank (211) does not reach a predetermined liquid level state, the second opening degree adjustment valve (25) is closed, the first opening degree adjustment valve (24) is opened, and the first opening degree adjustment valve (24) is closed until the liquid level in the acceleration tank (211) reaches a set value.
  15. 15. The method of claim 14, wherein the heater (212) is turned on and power is supplied to the heater (212) until the temperature of the electrolyte in the acceleration tank (211) reaches a set temperature T set1 .
  16. 16. The method of claim 15, wherein the temperature of the electrolyte in the acceleration tank (211) reaches a set temperature T set1 greater than a set temperature T set0 of the electrical hydrogen plant system.
  17. 17. The method according to claim 13, wherein in S02, the sum N 0 of the flow N 2 of the electrolyte from the acceleration tank (211) and the flow N 3 of the electrolyte from the feed assembly (1) is equal to the flow N set set by the electro-hydrogen plant system.
  18. 18. The method for increasing cold start speed according to claim 13, wherein in S02, the value of the electrolyte temperature T 0 entering the electrolytic tank (3) is equal to the set temperature T set0 of the electrical hydrogen plant system, and the electrolyte temperature inside the acceleration assembly (2) is maintained at the set temperature T set1 .
  19. 19. The method for increasing a cold start speed according to claim 13, wherein in S03, the acceleration tank (211) starts supplying energy when the opening of the third opening degree adjusting valve (26) reaches 80%.
  20. 20. The method according to claim 13, wherein in S03, the sum N 0 of the flow N 2 of the electrolyte from the acceleration tank (211) and the flow N 3 of the electrolyte from the liquid inlet assembly (1) is equal to the flow N set set by the electro-hydrogen production equipment system, the value of the electrolyte temperature T 0 entering the electrolytic tank (3) is equal to the set temperature T set0 of the electro-hydrogen production equipment system, and the temperature of the electrolyte inside the acceleration assembly (2) is maintained at the set temperature T set0 of the electro-hydrogen production equipment system.

Description

Device and method for improving cold start speed of alkaline electro-hydrogen production equipment system Technical Field The application relates to the field of hydrogen production technical equipment by water electrolysis, in particular to a device and a method for improving the cold start speed of an alkaline hydrogen production equipment system. Background The renewable energy power generation has volatility and randomness, and the hydrogen production by water electrolysis is a high-quality digestion means of renewable energy power generation. The basic structure of the alkaline electrolytic cell comprises a power supply, an electrolytic cell, a gas-liquid separator, gas purification equipment and a control system. The power supply provides energy for the equipment system, the control system controls parameters such as reaction temperature, pressure and the like, the alkaline pump pumps the electrolyte into the electrolytic tank to react, hydrogen is generated on the cathode side, and oxygen is generated on the anode side. The gas-liquid mixtures at two sides respectively enter different gas-liquid separators to separate the gas in the gas-liquid mixtures. The separated oxygen is emptied or collected, and the hydrogen enters a gas purification device for drying and purification to form the hydrogen with the purity of more than 99.8 percent. Before the power supply is started, the temperature of the electrolyte inlet is judged. The temperature of electrolyte entering the electrolytic tank is judged, when the temperature is lower than 40 ℃, the current density is set to 80% of rated current density, when the temperature is 60 ℃ or more and T is not less than 40 ℃, the current density is set to 85% of rated current density, when the inlet temperature is not less than 60 ℃, the current density is set to 90% of rated current density, and when the inlet temperature is not less than 80 ℃, the current density is set to rated current density. The components and the control system of the traditional alkaline water electrolysis hydrogen production equipment system are designed to face fixed working conditions. The cold start speed can be as high as 1 hour, and the intermittent characteristic of renewable energy power generation cannot be adapted, so that the flexibility of the equipment in participating in fluctuation energy consumption is affected. Cold start-up speed refers to the time from the start-up device to reach the desired reaction temperature of the electrolyzer. In view of the above related art, the inventor considers that the cold start scheme in the prior art has a heat source of an electrolytic tank, alkali liquor flows in an equipment system, heat is uniformly distributed into electrolyte in the equipment system, the electrolyte of the whole equipment needs to be heated to a set temperature, the electrolyte has high quality, the temperature rising speed of the electrolyte is low, and the time for rising to the set temperature is long, so that the cold start speed is influenced. Meanwhile, the heat source is an electrolytic tank, the electrolytic tank is utilized for heating, part of energy is converted into hydrogen in the heating process, the heating power is lower than the power of a power supply, the heating power is low, the time for lifting to the set temperature is long, and the cold starting speed is low. At present, the vacuum insulation tank is utilized to raise the initial temperature of electrolyte, the electrolyte is required to be pumped into the vacuum insulation tank during the shutdown period, the electrolyte of equipment is emptied, the liquid sealing function is lost, nitrogen purging is required to be carried out again during startup, the flow is complex, the operation time is long, and the final refrigeration guiding starting speed is low. Disclosure of Invention In order to greatly improve the cold start speed of an alkaline water electrolysis hydrogen production equipment system, the cold start time is reduced from an hour level to a minute level, the response speed of the electric hydrogen production equipment system to a fluctuation working condition is improved, the adaptability and the flexibility of the electric hydrogen production equipment in a renewable energy power generation system are enhanced, and the application provides a device and a method for improving the cold start speed of the alkaline water electrolysis hydrogen production equipment system. The application provides a device for improving the cold start speed of an alkaline electro-hydrogen production equipment system, which adopts the following technical scheme: The utility model provides a promote alkaline electricity hydrogen plant system cold start speed device, includes the feed liquor subassembly, the play liquid end of feed liquor subassembly is connected with accelerating assembly, accelerating assembly's play liquid end is connected with the electrolysis trough, the play liquid end of electrolysis