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Wide-power water electrolysis hydrogen production system and method

A hydrogen production system and electrolyzed water technology, applied in the electrolysis process, electrolysis components, separation methods, etc., can solve problems such as insufficient response capability, limited power adjustable range, and decreased gas purity, so as to reduce complexity and cost, broaden the Power operating range, the effect of improving work efficiency

Pending Publication Date: 2020-07-03
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing electrolytic water hydrogen production system has a limited power adjustable range, and the system pressure adjustment and other response capabilities are insufficient during wide power fluctuations, and the gas purity decreases under low power conditions

Method used

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  • Wide-power water electrolysis hydrogen production system and method

Examples

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Effect test

Embodiment approach

[0039] like figure 1 As shown, a wide-power electrolysis water hydrogen production system includes a rectifier transformer 1 and an electrolyzer 2. The rectifier transformer 1 converts alternating current into direct current and then passes it into the electrolyzer 2. It also includes a gas-liquid separator 3 and a gas cooler 4. , gas drop catcher 5, rectifier transformer 1 is connected with fluctuating power supply, fluctuating power supply includes wind power or photovoltaic, gas-liquid separator 3 includes hydrogen separator and oxygen separator, gas cooler 4 includes hydrogen cooler and oxygen cooler , the gas drop catcher 5 includes a hydrogen drop catcher and an oxygen drop catcher, the catholyte liquid outlet of the electrolytic cell 2 communicates with the hydrogen separator of the gas-liquid separator 3, and the anolyte liquid outlet of the electrolytic cell 2 The oxygen separator of the gas-liquid separator 3 communicates with each other, the gas outlet of the hydrog...

Embodiment 1

[0042] When the present invention is in operation, wind power or photovoltaic is used as a power source and converted into direct current that can be used for electrolyzing water through the rectifier transformer 1. The electrolyzer 2 uses an alkaline electrolyzed water electrolyzer, and the total hydrogen production scale is 1000Nm 3 / h, using two electrolyzers connected in parallel, the hydrogen production scale of each electrolyzer is 500Nm 3 / h, the minimum hydrogen production capacity of each electrolyzer is 200Nm 3 / h, the electrolyzer controller 9 determines the output of the electrolyzer according to the output of wind power or photovoltaic: when the required hydrogen production reaches 1000Nm 3 / h, both electrolyzers 2 are running at full power, and the electrolytic solution flowing out of the cathodes of the two electrolyzers 2 is merged into the hydrogen separator of the gas-liquid separator 3, and the hydrogen gas enters the gas cooler 4 after escaping from the hyd...

Embodiment 2

[0044] like figure 1 As shown, wind power or photovoltaic is used as a power source and converted into direct current for electrolysis of water through rectifier transformer 1, and electrolysis cell 2 uses an alkaline electrolysis water electrolysis cell, with a total hydrogen production scale of 1000Nm 3 / h, using two electrolyzers connected in parallel, the hydrogen production scale of each electrolyzer is 500Nm 3 / h, the minimum hydrogen production capacity of each electrolyzer is 200Nm 3 / h, the electrolyzer controller 9 determines the output of the electrolyzer according to the output of wind power and photovoltaic: when the required hydrogen production reaches 200Nm 3 / h, one electrolyzer 2 stops running, and the other electrolyzer 2 produces hydrogen with an output of 200Nm 3 / h, the electrolytic cell 2 that stops running, the electrolyte no longer circulates, and at the same time, the electrolytic current is adjusted to zero, and in the electrolytic cell 2 that is ru...

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Abstract

The invention discloses a wide-power water electrolysis hydrogen production system and method. The system comprises a rectifier transformer and an electrolytic bath, the rectifier transformer convertsAC into DC and then introduces DC into the electrolytic bath; the system further comprises a gas-liquid separator, a gas cooler and a gas drop catcher; the rectifier transformer is connected with a fluctuating power supply; the gas-liquid separator comprises a hydrogen separator and an oxygen separator; the gas cooler comprises a hydrogen cooler and an oxygen cooler; the gas drop catcher comprises a hydrogen drop catcher and an oxygen drop catcher; the cathode electrolyte outlet of the electrolytic bath is communicated with the hydrogen separator of the gas-liquid separator, and the anode electrolyte outlet of the electrolytic bath is communicated with the oxygen separator of the gas-liquid separator. The problems that a conventional water electrolysis hydrogen production system is limited in power adjustable range, and the response capacity of the system such as pressure adjustment, and the like, in the wide power fluctuation period is insufficient are solved.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by electrolysis of water, in particular to a hydrogen production system by wide power electrolysis of water. Background technique [0002] Hydrogen energy is a green and efficient secondary energy source, which has broad application prospects in transportation, electricity, fuel and other fields. At present, hydrogen mainly comes from fossil fuel hydrogen production such as coal hydrogen production and natural gas reforming hydrogen production. However, fossil fuel hydrogen production has serious pollution and is limited by resource endowment and other problems. With the large-scale development of renewable energy such as wind power and photovoltaics, the use of renewable energy to electrolyze water to produce hydrogen provides a green, low-carbon, low-cost, and sustainable production method for hydrogen energy. [0003] However, due to the volatility of power sources such as wind pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B9/04C25B9/18C25B15/00C25B15/02B01D5/00B01D53/26
CPCC25B1/04C25B15/00C25B15/02B01D53/002B01D53/265B01D53/26B01D2257/80C25B9/65C25B9/70Y02E60/36Y02P20/133
Inventor 余智勇任志博张畅郜时旺刘练波
Owner HUANENG CLEAN ENERGY RES INST
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