Compressed gas energy storage type membrane distillation seawater desalination system and seawater desalination process thereof

Abstract

The invention discloses a compressed gas energy storage type membrane distillation seawater desalination system and a seawater desalination process thereof, and belongs to the field of desalination and water treatment. The system comprises a water taking pump, a seawater pretreatment unit, a membrane distillation unit, a heat collection unit, an energy obtaining unit and an energy storage unit. Renewable energy sources such as solar energy and wind energy are used for supplying power and heat, a stable desalination process is realized by combining an energy storage technology and a membrane distillation technology, and the energy utilization efficiency is relatively high; a preheater is used for recovering the waste heat of the strong brine, so that good heat economy is achieved, and good water production flexibility is achieved by controlling the mixed salinity of the desalted water and the strong brine; and the compressed gas energy storage system solves the problems of instability, discontinuity and the like when renewable energy sources are obtained, and can assist the energy storage system in supplying power. The compressed gas energy storage type membrane distillation seawater desalination system is simple and compact in structure, saves physical space, and is simple and convenient to install and maintain.

Description

technical field [0001] The invention relates to the field of desalination and water treatment, and relates to a membrane distillation seawater or brackish water desalination technology capable of energy storage, in particular to a compressed gas energy storage type membrane distillation seawater desalination system and a seawater desalination process. Background technique [0002] Water resources and energy are important foundations for the survival and development of human society, and the environmental problems caused by the excessive exploitation of groundwater have made people focus on sufficient seawater resources. Nowadays, seawater desalination technology has been widely used in the world, and it can be divided into thermal desalination and membrane desalination according to the principle of water production. Membrane distillation technology is an emerging seawater desalination technology, which has attracted widespread attention due to its advantages of pure distilla...

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Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a compressed gas energy storage type membrane distillation seawater desalination system and its seawater desalination process to solve the problem of low energy utilization rate of the thermal method unit and coupled The structure of the system is not flexible enough

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