Self-heating starting water electrolysis hydrogen production system and operation method thereof

Abstract

The invention provides a self-heating starting water electrolysis hydrogen production system and an operation method thereof.The self-heating starting water electrolysis hydrogen production system comprises an electrolytic bath, a gas-liquid separation device, an electrolyte buffer tank and a circulating pump which are sequentially connected end to end through a pipeline, and further comprises a catalytic burner; a gas inlet of the catalytic combustor is connected with the gas-liquid separation device through a pipeline, a gas outlet is further formed in the bottom end of the catalytic combustor, and crude hydrogen generated through electrolysis or stored high-purity hydrogen is used for providing a heat source for the device and heating electrolyte in the cold start process through catalytic combustion; the quick cold start of the water electrolysis hydrogen production system is realized, and the time for the hydrogen production system to reach a rated working condition is effectively shortened; the temperature of the electrolyte is rapidly increased through auxiliary heating, and the obvious effect of reducing hydrogen production energy consumption is achieved; and after the cold start is finished, the catalytic combustion device can also be used for treating hydrogen which is not collected and emptied as a product, so that remarkable environmental protection benefits are achieved.

Description

technical field [0001] The present application relates to the technical field of hydrogen production equipment, in particular to a self-heating start-up electrolysis water hydrogen production system and its operating method. Background technique [0002] As a flexible, efficient, and zero-carbon energy carrier, hydrogen plays an important role in helping to accelerate the decarbonization process and the transformation of the energy structure. Hydrogen can be divided into the following categories according to the source: hydrogen produced based on fossil fuels belongs to gray hydrogen; hydrogen produced based on fossil fuels combined with carbon capture, utilization and storage technologies belongs to blue hydrogen; hydrogen produced based on renewable energy Hydrogen belongs to green hydrogen. As the cost of renewable electricity such as wind power and photovoltaics continues to decline, the electrolysis of water based on renewable energy is regarded as the most promising g...

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Problems solved by technology

The resistance of the electrolyte in the low temperature range is high, resulting in high energy consumption for electrolytic hydrogen production, and the hydrogen production cannot be increased to the rated output in a short time

[0004] Therefore, there is a need in this field to develop a self-heating start-up electrolysis water hydrogen production system to solve the technical problems of slow cold start-up and high start-up energy consumption of the electrolyzer

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