Solar membrane distillation seawater desalination plant for sea island

Abstract

The invention discloses a solar membrane distillation seawater desalination plant for a sea island. The solar membrane distillation seawater desalination plant comprises a membrane module, a filter, a raw water pump, a solar heater, a solar thermoelectric system, a desalted water tank and pipelines used for connection of the above mentioned parts. The raw water pump is connected with an inlet of the filter; an outlet of the filter is connected with a cold seawater inlet of the membrane module; a cold seawater outlet of the membrane module is connected with a water inlet of the solar heater; an outlet of the solar heater is connected with a hot seawater inlet of the membrane module; and a water producing outlet at the bottom of the membrane module is connected with the desalted water tank. The solar membrane distillation seawater desalination plant for a sea island provided by the invention has the advantages of a high heat recovery rate, simple equipment, no need for electric power, low operation cost, etc.

Description

technical field [0001] The invention relates to a water treatment device, in particular to membrane distillation for solar seawater desalination. Background technique [0002] Seawater desalination is the most economical and environmentally friendly way to draw fresh water, and it has become the first choice to open up new water sources on a large scale and solve the increasingly serious worldwide water shortage problem. At present, the seawater desalination methods used on a large scale in industry are mainly distillation method and membrane method. In the early 1950s, membrane technology was applied to desalination of seawater. By the 1970s, membrane desalination had been commercialized, and now it has become the most economical desalination technology for seawater and brackish water. Membrane technology is playing an important role in the deep development and utilization of marine resources. A new type of membrane separation technology developed in the past 20 years—mem...

AI Technical Summary

Problems solved by technology

At present, China's islands basically rely on supply ships to supply fresh water, which is expensive. Moreover, for very remote islands, there is insufficient power or no power supply at all. Other desalination equipment cannot operate at all. In times of emergency such as war, the supply line It is easy to be cut off, making the defense, production and life of the island extremely passive

However, on the island, although electricity is scarce, solar energy resources are abundant. If solar energy can be effectively used to desalinate seawater, it will be able to solve the problem of living and drinking water without relying on ocean supply and electric energy.

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