Film distilling seawater desalination system using economical energy resources

Abstract

The invention discloses a film distillation seawater desalting system by utilizing economical energy. The system comprises a film component, a seawater storage tank and a freshwater storage tank; the hot side of the film component is provided with a seawater inlet and a seawater outlet; the cold side of the film component is provided with a steam outlet; the seawater inlet of the film component is connected with an outlet of the seawater storage tank by a feed pump; the seawater outlet of the film component and the steam outlet are connected to the same heat pump; a seawater outlet of the heat pump is connected with the seawater storage tank; a freshwater outlet of the heat pump is connected with an inlet of the freshwater storage tank; and an inlet of the seawater storage tank is connected with a seawater heating system. The seawater outlet and the steam outlet of the film component of the desalting system disclosed by the invention are connected to the same heat pump, thereby realizing the recovery of steam heat by seawater, improving the energy using efficiency and saving manufacturing cost without needing specialized cooling equipment to condense steam.

Description

technical field [0001] The invention relates to a seawater desalination device, in particular to a membrane distillation seawater desalination system utilizing economical energy. Background technique [0002] About 1.5 billion people in more than 80 countries around the world face insufficient fresh water, of which 300 million people in 26 countries live in a state of complete water shortage. It is estimated that by 2025, 3 billion people in the world will be short of water, involving more than 40 countries and regions. In the 21st century, water resources are becoming a precious and scarce resource. On the other hand, seawater and salt water reserves on the earth are huge, accounting for about 97% of the total water storage on the earth. Therefore, desalination of seawater and brackish water is one of the effective solutions to the shortage of freshwater resources. [0003] At present, the mature seawater desalination technology can be mainly divided into distillation me...

AI Technical Summary

Problems solved by technology

Although the solar membrane distillation system disclosed in this patent also uses solar energy, it still needs to use solar energy to generate electricity, so as to realize the cooling of fresh water vapor, which increases the manufacturing cost

Moreover, the steam coming out of the membrane module is directly cooled by the condenser, which wastes the heat of the steam, and the energy efficiency is not high.

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