High-pressure proton exchange membrane water electrolysis system

Abstract

The invention relates to the technical field of hydrogen production through water electrolysis, and discloses a high-pressure proton exchange membrane water electrolysis system. The system comprises a high-pressure proton exchange membrane electrolytic bath, a water tank, an anode circulating pipeline and a cathode circulating pipeline; a liquid inlet of a first jet vacuum pump of the anode circulation pipeline is communicated with an anode exhaust port, a liquid suction port of the first jet vacuum pump is communicated with a water tank, and a liquid discharge port of the first jet vacuum pump is communicated with a first gas-liquid separator; a liquid inlet of a second jet vacuum pump on the cathode circulating pipeline is communicated with the cathode exhaust port, a liquid outlet of the second jet vacuum pump is communicated with the second gas-liquid separator, and a liquid suction port of the second jet vacuum pump is communicated with the water tank; and the first jet vacuum pump and the second jet vacuum pump supplement water by using the pressure generated by the high-pressure proton exchange membrane electrolytic bath. No additional water supplement pump needs to be arranged for supplementing water, so that the energy consumption of the high-pressure proton exchange membrane water electrolysis system is reduced.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by water electrolysis, in particular to a high-pressure proton exchange membrane water electrolysis system. Background technique [0002] In view of the dual pressures of energy shortage and environmental pollution, the renewable energy power generation technology is being vigorously developed at home and abroad. However, renewable energy, such as solar energy and wind energy, has a fatal problem of discontinuous and unstable energy supply, which brings many obstacles to its practical application. Another key issue is how to store the excess electric energy in the renewable energy system when the renewable energy is sufficient, so that it can be used when the system power supply is insufficient. [0003] The regenerative fuel cell energy storage / supply system is divided into two parts: the proton exchange membrane electrolyzer and the fuel cell. Among them, the proton exchange membra...

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Problems solved by technology

[0005] However, when the existing high-pressure proton exchange membrane electrolysis water system is working, the amount of water in the water circulation pipeline will gradually decrease with the progress of high-pressure electrolysis, and a supplementary water pump is needed to supplement the aqueous solution in the water circulation pipeline, and the energy consumption of the supplementary water pump is high. As a result, the overall energy conversion efficiency of the existing high-pressure proton exchange membrane electrolysis water system is low

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