A multi-channel alkaline hydrogen production system

Abstract

The invention provides a multi-channel alkaline hydrogen production system, in which the liquid outlets of the hydrogen-alkali treatment unit and the oxygen-alkali treatment unit output the circulating lye to the lye circulation pump and at least one controllable channel connected in parallel with the lye circulation pump Finally, the circulating lye returns to the negative pole of the electrolyzer; the controller can control the amount of hydrogen production according to the detected current of the electrolyzer, and then calculate the corresponding reference value of lye circulation according to the amount of hydrogen produced; By controlling the working state of the controllable channels at both ends of the lye circulation pump, the lye circulation volume of the multi-channel alkaline hydrogen production system can be adjusted, and the gas purity of the multi-channel alkaline hydrogen production system can be changed; When the renewable energy system is powered and the renewable energy system is operating in a low valley, the hydrogen production purity is low and the hydrogen production is terminated, so that the electrolyzer can always maintain full load operation, and is no longer limited to a specific load range. Therefore, it is applicable A hydrogen production system powered by a renewable energy system.

Description

Technical field [0001] The present invention belongs to the technical field of electrolytic hydrogen production, and more particularly to a multi-channel alkaline hydrogenation system. Background technique [0002] At present, in the market, the alkaline electrolytic cell has the longest development time, the technology is most mature, and its conventional configuration is: transformer + rectifier + hydrogen generator. Its specific hydrophobic system figure 1 As shown, the electrolytic cell has a positive and negative electrode, and the negative electrode side is provided with a hydrogen + base liquid outlet. The positive electrode side is provided with an oxygen + alkali outlet, which is connected to the post-stage hydrogen + alkali treatment unit and oxygen + base liquid treatment. The unit, the post-stage oxygen + base treatment unit processes the oxygen, the hydrogen + base liquid treatment unit is treated, produced hydrogen, and the basic liquid output by the two treatment u...

AI Technical Summary

Problems solved by technology

In addition, the hydrogen production of the electrolyzer is proportional to the current passing through the electrolyzer, so the hydrogen production of the renewable energy hydrogen production system is always changing; and the renewable energy hydrogen production system is equipped with an alkaline electrolyzer, which is 20% When the following low-load operation occurs, the hydrogen purity decreases and cannot meet the use requirements. At this time, the hydrogen must be vented. When the hydrogen purity is lower than the lower limit interlock value, the hydrogen production system will be interlocked to stop, that is, hydrogen production will be stopped.

Therefore, existing technologies cannot be fully applied to hydrogen production from renewable energy sources

Images