Water electrolysis hydrogen production method

Abstract

The invention relates to a water electrolysis hydrogen production method, belonging to the field of water electrolysis hydrogen production. The water electrolysis hydrogen production method comprises two sets of water electrolysis hydrogen production equipment, namely No.1 hydrogen production equipment and No.2 hydrogen production equipment, wherein two block valves V1 and V2 are arranged on a hydrogen pipeline between a hydrogen production framework A1-1 and a purification framework A1-2 of the No.1 hydrogen production equipment; and two block valves V6 and V7 are arranged on a hydrogen pipeline between a hydrogen production framework A2-1 and a purification framework A2-2 of the No.2 hydrogen production equipment. According to the method, the utilization rate of system equipment is improved by modifying serial connection and parallel connection of a water electrolysis hydrogen system, the maintenance frequency and system abnormal on-off frequency are reduced, a great amount of maintenance cost is saved, the hydrogen production capacity of the system is improved, and the normal stable production of hydrogen users is ensured at the same time.

Description

Technical field: [0001] The invention belongs to the field of hydrogen production by electrolysis of water, and in particular relates to a hydrogen production method by electrolysis of water. Background technique [0002] Water electrolysis hydrogen production equipment includes electrolyzer, hydrogen production framework and purification framework. Its hydrogen production principle: water is electrolyzed to produce hydrogen and oxygen under the action of direct current in the electrolyzer, in which KOH is used as the electrolyte, V 2 o 5 As a catalyst, the system consumes electricity and water; the hydrogen and oxygen produced by the electrolyzer are brought to the hydrogen separator and oxygen separator of the hydrogen production frame with the circulating lye, the separated hydrogen enters the purification frame, and the separated oxygen is emptied; The purity of the hydrogen gas obtained by the hydrogen frame is not high, and it needs to be deoxidized and dried by the ...

AI Technical Summary

Problems solved by technology

Especially in the operating environment where there are many valves in the purification framework, frequent leakage events occur, and the unit must be shut down for treatment, which directly leads to a decrease in system gas production efficiency and an increase in energy consumption (>5.1 kwh / m 3 h 2 )

[0004] In order to ensure the safety of the unit and surrounding personnel and facilities, hydrogen leakage must be shut down as soon as possible. Since the frequent start and stop of the equipment not only affects the system production, but also affects the life of the equipment, and the threaded connection parts of the pipeline valves are more likely to leak

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