Method for stopping gas production device, and method for producing oxygen gas and hydrogen gas
By implementing electrolyte exchange and pressure management in a high-pressure alkaline water electrolysis unit, the problem of increased hydrogen and oxygen solubility was solved, ensuring the safe shutdown and high-purity restart of the gas production unit.
CN121127634APending Publication Date: 2025-12-12TOKUYAMA CORP
Patent Information
- Application Number
- CN202480030925.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-06-13
- Filing Date
- 2024-06-10
- Publication Date
- 2025-12-12
AI Technical Summary
Technical Problem
In high-pressure alkaline water electrolysis devices, especially during shutdowns and restarts when solar power generation is insufficient, the dissolved hydrogen and oxygen in the electrolyte increase, leading to gas coexistence. This may result in increased flammability and decreased purity, and could even reach the explosion limit.
Method used
Electrolyte exchange or mixing is carried out under pressure. By reducing the pressure inside the device and releasing dissolved gases, the balanced circulation of electrolyte between the anode and cathode sides is ensured, and gas coexistence is prevented.
Benefits of technology
It effectively prevents gas coexistence, maintains gas purity, avoids the risk of explosion, and ensures a safe shutdown and restart process.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN121127634A_ABST
Abstract
In a method for electrolyzing an alkaline electrolyte solution under pressurized conditions, the electrolyte solution flowing out from an anode chamber and a cathode chamber circulates so as to flow into the anode chamber and the cathode chamber again, and the operation of the gas production apparatus is stopped by a step provided with a predetermined step. The gas composition can be prevented from reaching the explosion limit.
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Citation Information
Patent Citations
Gas production device and gas production method
WO2020022190A1