PEM electrolytic water hydrogen production electrolytic tank hot standby system and switching method

By sharing the gas-liquid separation unit and the anode circulation system, the problems of low compatibility and switching efficiency of the backup electrolyzer in the PEM water electrolysis hydrogen production system are solved, enabling fast and seamless electrolyzer switching and online maintenance, reducing equipment costs and operational risks, and improving the system's flexibility and availability.

CN122256991APending Publication Date: 2026-06-23WUXI WEIFU HIGH TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUXI WEIFU HIGH TECH CO LTD
Filing Date
2026-03-18
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing PEM water electrolysis hydrogen production systems suffer from poor compatibility in the configuration of backup electrolyzers, complex system structure, low switching efficiency, and difficulty in online maintenance, resulting in limited equipment selection, high costs, and unstable operation.

Method used

The system employs a shared gas-liquid separation unit and an anode circulation system, and uses a multi-way valve group to enable rapid switching and online maintenance between the standby electrolyzer and the main electrolyzer, simplifying the system structure and reducing reliance on hydrogen buffer tanks.

Benefits of technology

It enables rapid and seamless switching of backup electrolytic cells, reduces equipment costs and operational risks, and improves system flexibility and availability, making it suitable for continuous production scenarios.

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Abstract

The present application relates to a kind of PEM electrolytic water hydrogen production electrolytic cell thermal backup system and switching method.The present application includes running electrolytic cell and backup electrolytic cell;Shared oxygen separator and shared hydrogen separator, hydrogen purification system and hydrogen buffer tank are connected downstream of the hydrogen separator;Anode circulating water system, including main circulating pump, cooler and pure water purification equipment;First multi-way valve and second multi-way valve;The first multi-way valve can switch fluid passage, to make the outlet of the anode circulating water system selectively communicated with the anode inlet of the running electrolytic cell or the anode inlet of the backup electrolytic cell;The second multi-way valve can switch fluid passage, to make the anode outlet of the running electrolytic cell or the anode outlet of the backup electrolytic cell selectively communicated with the inlet of the shared oxygen separator.The present application significantly reduces the dependence on hydrogen buffer tank, and can isolate and maintain fault electrolytic cell without shutdown.
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