Device and method for high temperature electrolysis of seawater to prepare hydrogen

Abstract

The invention relates to a device for high temperature electrolysis of seawater to prepare hydrogen. A high temperature water electrolysis hydrogen producing system and a seawater desalination systemare connected so that steam from the seawater desalination system is electrolyzed in a solid oxide electrolysis tank to obtain mixed gas composed of hydrogen and unreacted steam; the seawater desalination system is connected to a molten salt heat storage system so that the crystallized salts obtained by heating and evaporating seawater are taken as the raw materials for preparing chlorine salts for the molten salt heat storage system; the molten salt heat storage system is connected to the seawater desalination system so that the molten salt heat storage system provides heat for the heating ofseawater; and the molten salt heat storage system is connected to the high temperature water electrolysis hydrogen producing system so as to provide heat for the steam that enters the solid oxide electrolysis tank. The invention also provides a method for preparing hydrogen through high temperature seawater electrolysis by using the device mentioned above. The provided device and method can realize seawater high temperature electrolysis to produce hydrogen and seawater desalination at the same time, and have a wide application range.

Description

technical field [0001] The invention relates to seawater treatment, more particularly to a device and method for preparing hydrogen by high-temperature electrolysis of seawater. Background technique [0002] Currently, energy crisis and environmental pollution are the two most urgent problems for human society to solve. The most direct and effective way to solve these two problems is to develop new, clean and efficient energy and energy utilization technologies. For a long time, hydrogen energy has been considered as one of the important ways to solve the future human energy crisis. Hydrogen, as an emerging and clean secondary energy carrier, is more and more widely used in modern society, and has attracted more and more attention from developed countries such as the United States, Germany, Japan, and has formulated relevant development plans, identifying hydrogen energy and fuel cells as One of the technologies that sustain economic prosperity and national security. my c...

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Problems solved by technology

Therefore, although the total amount of water resources is huge, there is a serious shortage of fresh water resources, much less than we imagined, which greatly limits the wide application of SOEC

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