Integrated double-effect plate seawater desalination device and its working method

Abstract

The invention discloses an integral double-effect plate type seawater desalination device and a working method thereof and belongs to the field of seawater desalination. The integral double-effect plate type seawater desalination device is characterized by being formed by compressing a series of seawater desalination plate sheets, wherein two different sealing strip structures are arranged between two adjacent plate sheets at intervals. Each seawater desalination plate sheet is sequentially provided with a first-effect heat exchange region, a first steam-liquid separation region, a second-effect heat exchange region, a second steam-liquid separation region, a condensation heat exchange region from bottom to top; and each plate sheet is also provided with a first steam-liquid mixture channel, a first pure steam channel, a second steam-liquid mixture channel, a second pure steam channel, a seawater inlet channel, a heat source channel, a cold source channel, a fresh water channel, a brine outlet channel and an inter-effect seawater channel. According to the integral double-effect plate type seawater desalination device, with reasonable arrangement of the sealing strip structures, various function regions required by seawater desalination are formed on the two sides of a same plate sheet, so that the compactness of the double-effect seawater desalination device is greatly improved; and due to less used corrosion resistant metal material, the cost is lower.

Description

technical field [0001] The patent of the present invention relates to an integrated double-effect plate seawater desalination device and its working method, belonging to the field of seawater desalination. Background technique [0002] Ships operating in the sea need to consume a lot of fresh water every day, and seawater desalination technology is becoming an important means of supplementing fresh water resources for ships. In the past few decades, seawater desalination technology has developed rapidly. At present, the most widely used seawater desalination technologies in industry are reverse osmosis membrane method and distillation method. [0003] Due to the short service life of the separation membrane, the operation and maintenance costs of the reverse osmosis membrane method are relatively high. In addition, the brine produced by the reverse osmosis membrane method contains a large amount of chemical agents, and direct discharge will cause water pollution. There are ...

AI Technical Summary

Problems solved by technology

[0005] Considering the tonnage of the ship and the demand for cargo, the seawater desalination device needs to have the characteristics of small space occupation and high water quality. However, the current thermal seawater desalination device has a large overall structure and a huge external vapor-liquid separation area. Seawater is corrosive, and seawater desalination devices are generally made of corrosion-resistant titanium or copper and other precious metals, and the entire seawater desalination device is expensive to manufacture

Images