Integrated system of electrolysis device and water treatment desalination system

The invention discloses an integrated system of an electrolysis device and a water treatment desalination system. The integrated system comprises an electrolysis device, a third heat exchanger and a water treatment device, and is used for receiving part of heat transferred by the third heat exchanger and carrying out desalination treatment on seawater to obtain water vapor and high-concentration saline water, and the other part of heat collected by the third heat exchanger is used for preheating feed gas supplied to the electrolysis device. Creative system integration is adopted, and renewable energy hydrogen production, an electrolysis device and a water treatment system are systematically integrated, so that the problem of redundant power consumption of renewable energy power generation is solved, and electric energy is converted into hydrogen for storage through electrolysis of the electrolysis device in time. Rich waste heat of the electrolysis device can be utilized to provide fresh water for a renewable