Alkali liquor circulation system of alkaline hydrogen production electrolytic bath and working method of alkali liquor circulation system

Abstract

The invention belongs to the technical field of alkaline water electrolysis hydrogen production, and discloses an alkali liquor circulation system of an alkaline hydrogen production electrolytic bath. The system comprises an alkaline electrolytic bath, an anode side gas-liquid separation kettle, a cathode side gas-liquid separation kettle, an anode side alkaline liquid circulation pump, a cathode side alkaline liquid circulation pump, a valve group and a connecting pipeline. Three different alkali liquor circulation modes, namely, a complete mixing mode, a partial mixing mode and a complete separation mode, can be realized by controlling the opening and closing of the valve group. The valve assembly is additionally arranged to achieve decoupling of electrolyte circulation on the anode side and the cathode side of the alkaline electrolytic bath, the mixing degree of alkali liquor on the anode side and the cathode side can be controlled according to requirements, and the flow of the alkali liquor on the anode side and the flow of the alkali liquor on the cathode side can be adjusted respectively and continuously; and through switching of the alkali liquor circulation modes and automatic adjustment of the alkali liquor flow, safe, stable and efficient operation of the electrolytic bath under different loads and in the variable load process is achieved, and absorption of renewable energy sources is achieved through hydrogen production by means of alkaline electrolysis water.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by alkaline electrolysis of water, and in particular relates to a lye circulation system of an alkaline hydrogen production electrolyzer and a working method thereof. Background technique [0002] Currently, hydrogen production from alkaline electrolysis of water is the only technology that can realize large-scale, long-term renewable energy power storage. Hydrogen production by alkaline electrolysis of water is a mature technology. However, conventional alkaline electrolyzers are poorly matched to fluctuating power inputs. At present, during the operation of the electrolytic cell, the electrolyte on the cathode side and the anode side are in a state of complete blending. During low-load operation, the gas mixing on the anode side and the cathode side is serious. When the gas mixture reaches the explosion limit, it is easy to cause serious damage. ACCIDENT. One way to solve this pro...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a lye circulation system and working method of an alkaline hydrogen production electrolyzer, which solves the problem of serious gas mixing between the anode side and the cathode side during low-load operation at low cost

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