Water electrolysis hydrogen production system

Abstract

The invention provides a water electrolysis hydrogen production system, which is applied to the technical field of hydrogen production. The system comprises an electrolytic cell, a hydrogen separation system, an oxygen separation system, a liquid return pipeline, a pressure stabilizing tank and a pressure stabilizing gas source, wherein a hydrogen side liquid outlet of the electrolytic cell is communicated with a hydrogen side liquid return port of the liquid return pipeline through the hydrogen separation system; an oxygen side liquid outlet of the electrolytic cell is communicated with an oxygen side liquid return opening of the liquid return pipeline through the oxygen separation system, a liquid outlet of the liquid return pipeline is communicated with a liquid return opening of the electrolytic cell, the pressure stabilizing gas source is communicated with a pressure adjusting port of the liquid return pipeline through the pressure stabilizing tank, electrolyte and pressure stabilizing gas are stored in the pressure stabilizing tank, and the pressure stabilizing gas source is used for adjusting the pressure of the pressure stabilizing tank. The electrolyte pressure of the hydrogen production system can be adjusted through the pressure stabilizing tank and the pressure stabilizing gas source, the electrolyte pressure can be maintained in a safe range, the time needed by pressure relief and pressure boosting is shortened, and the hydrogen production efficiency is improved; meanwhile, the pressure relief process is achieved by adjusting the pressure of the pressure stabilizing gas, hydrogen does not need to be released, and hydrogen waste can be avoided.

Description

technical field [0001] The invention relates to the technical field of hydrogen production, in particular to a water electrolysis hydrogen production system. Background technique [0002] The water electrolysis hydrogen production system has been widely used in recent years due to its advantages of cleanliness, pollution-free and high hydrogen production efficiency, see figure 1 , figure 1 It is a schematic diagram of the structure of the water electrolysis hydrogen production system in the prior art. The hydrogen production system mainly includes electrolytic cells, hydrogen separators, hydrogen-side regulating valves, oxygen separators, and oxygen-side regulating valves. Among them, the electrolytic cell and the production The hydrogen power supply is connected, and the hydrogen production operation is carried out by using the electric energy provided by the hydrogen production power supply. [0003] In practical applications, there are many options for the hydrogen prod...

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Problems solved by technology

The inventors have found that when the hydrogen production power source chooses a new energy hydrogen production power source such as a wind power generation system or a photovoltaic power generation system, due to the fluctuation of the output power of the new energy hydrogen production power source, when the output power of the new energy hydrogen production power source is difficult When the hydrogen production system is kept working, the hydrogen production system will shut down and reduce the electrolyte pressure of the entire system by releasing the hydrogen in the system. When the output power of the new energy hydrogen production power supply is sufficient to support the hydrogen production system, the hydrogen production system needs Restart the machine and re-establish the electrolyte pressure required for hydrogen production. Frequent pressure relief and boosting will not only lead to low hydrogen production efficiency of the entire hydrogen production system, but also cause hydrogen waste

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