Water electrolysis hydrogen production device and method for multiple electrolytic cells

Abstract

The invention discloses a water electrolysis hydrogen production device and method for multiple electrolytic baths, the water electrolysis hydrogen production device comprises the electrolytic baths, an oxygen separator, a hydrogen separator, a circulating pump, an oxygen side control device, a hydrogen side control device and an alkali liquor flow control system, the multiple electrolytic baths are arranged in the system, and the oxygen separator is provided with one separator; the hydrogen separator is provided with two separators which are connected in series and have the same volume as the oxygen separator, the oxygen side control device comprises a large oxygen regulating valve and a small oxygen regulating valve which are connected in parallel, an oxygen automatic ball valve in front of the oxygen regulating valves and oxygen bypass manual ball valves connected to the two ends of the oxygen regulating valves and the two ends of the oxygen automatic ball valve, and the hydrogen side control device comprises a large hydrogen regulating valve and a small hydrogen regulating valve which are connected in parallel. The hydrogen / oxygen side control device is respectively provided with a large adjusting valve and a small adjusting valve, so that the adjusting precision of a single electrolytic cell during low-load operation can be ensured, each flowmeter and each automatic adjusting valve of the alkali liquor control system correspond to one electrolytic cell, and the opening degree adjustment of an alkali path of each electrolytic cell can be automatically controlled.

Description

technical field [0001] The invention relates to the technical field of hydrogen production, in particular to a water electrolysis hydrogen production device and method with multiple electrolyzers. Background technique [0002] The hydrogen production method by electrolyzing water is to conduct direct current electrolysis on the electrolyte in the water electrolyzer, and generate liquid hydrogen and oxygen at the cathode and anode respectively, and then send them to the hydrogen separator and oxygen separator in two ways for gravity separation. Hydrogen and oxygen are sent upwards to the point of use, while the electrolyte is returned to the circulating pump, and then sent to the electrolytic cell for electrolysis, and hydrogen and oxygen are generated in this way. During this process, it is necessary to ensure the balance of the liquid levels in the hydrogen separator and the oxygen separator to avoid the risk of eruption caused by gas-liquid crosstalk. Usually, the balance ...

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Problems solved by technology

[0005] However, when multiple electrolyzers are connected in parallel to produce hydrogen, the number and load of the electrolyzers are variable, and the range of variation is large. The pressure balance system in the general hydrogen separator and oxygen separator takes into account the low-load operation of the electrolyzer and the When the electrolyzer is in normal operation, although the liquid levels in the hydrogen separator and the oxygen separator can still be balanced, the accuracy of the balance is low, which increases the danger in the hydrogen production process for the entire device

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