Combined diaphragm regulating valve device, alkaline water electrolysis hydrogen production system and control method

Abstract

The invention relates to a combined diaphragm regulating valve device, an alkaline water electrolysis hydrogen production system and a control method. The combined diaphragm regulating valve device comprises a plurality of diaphragm regulating valve branches with different gas flow ranges and flow distributors used for distributing flow of the branches, the diaphragm regulating valve branches arearranged in parallel, the flow distributors are connected with the diaphragm regulating valve branches respectively, and in the working process, at least one diaphragm regulating valve branch works. The alkaline water electrolysis hydrogen production system comprises an alkaline water electrolysis hydrogen production device, an alkali liquor circulating device and two combined diaphragm regulatingvalve devices. The alkaline water electrolysis hydrogen production device comprises an electrolytic cell, an oxygen side gas-liquid separator and a hydrogen side gas-liquid separator. The alkali liquor circulating device is connected with the alkaline water electrolysis hydrogen production device, and the combined diaphragm regulating valve devices are respectively arranged at the gas output endsof the oxygen side gas-liquid separator and the hydrogen side gas-liquid separator. Compared with the prior art, the safety of the alkaline water electrolysis hydrogen production system under different working power ranges is ensured.

Description

technical field [0001] The invention relates to the technical field of alkaline electrolytic water hydrogen production, in particular to a combined diaphragm regulating valve device, an alkaline electrolytic water hydrogen production system and a control method. Background technique [0002] Hydrogen energy is considered to be one of the major strategic directions of the world's energy and power transformation, and has attracted the attention of countries all over the world. In the production of hydrogen by electrolysis of water, the most mature technical route at present is alkaline electrolysis of water technology. [0003] Chinese Patent CN 110106512 A: Electrolyzed Water Hydrogen Production Device The device includes j parallel branches, and each parallel branch has k hydrogen production units in series, which can easily adjust the hydrogen production device to different powers, and adjust There are many gears, which are well adapted to the fluctuation of input power whe...

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Problems solved by technology

[0005] Although the existing related research mentioned the use of multiple electrolyzed water hydrogen production units in the same system to meet power fluctuations, and also carried out the design of the electrolyzer exhaust device, they did not consider the alkaline electrolyzed water hydrogen production equipment in the When working under different power, the gas flow rate is different, which makes it difficult to accurately adjust the pressure of the gas diaphragm valve of the gas-liquid separation module, and lacks the design of a combined adjustment system for the diaphragm valve

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