Novel efficient seawater desalting device

Abstract

The invention provides a novel efficient seawater desalting device. The novel efficient seawater desalting device comprises a reverse osmosis seawater desalting system, a vacuum distillation system, acondensation and water production system, a heat energy circulating system and a product water tank, wherein the vacuum distillation system is communicated with the condensation and water productionsystem, the reverse osmosis seawater desalting system and the heat energy circulating system respectively; and the product water tank is communicated with the condensation and water production systemand the reverse osmosis seawater desalting system respectively. The novel efficient seawater desalting device provided by the invention has the beneficial effects that 1, power is provided for runningof subsequent equipment through negative-pressure suction energy generated by a spraying effect of seawater reverse osmosis concentrated water through a spraying device; 2, heat exchange is carried out on concentrated water in a membrane distillation box by adopting the sprayed concentrated water, so that the heat energy is recycled to a great extent and power consumption of a heater is reduced;3, a distillation membrane assembly is adopted, is a hydrophobic membrane, has good permeability on water steam and is used for stopping osmosis of the concentrated water; and 4, the heat energy is recycled by adopting a water steam method in a seawater cooling condenser, and temperature raising treatment is carried out on seawater and the water yield of a reverse osmosis membrane is improved.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a novel high-efficiency seawater desalination device. Background technique [0002] The shortage of water resources has become a global problem. Using seawater desalination technology to open up new freshwater sources and increase the total supply of freshwater has gradually become an important way for countries all over the world to solve the water crisis. The existing seawater desalination methods mainly include thermal method and reverse osmosis membrane method, but these methods need to consume a lot of energy, and the operating pressure of the small reverse osmosis seawater desalination system is generally 5.5MPa ~ 6.5MPa, the pressure of concentrated seawater discharged from the membrane module It is still as high as 5.2MPa~6.2MPa, and there is a relatively large pressure energy in concentrated seawater. If it is recycled, it will have a certain value in reduc...

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Problems solved by technology

The power exchange type generally has high performance requirements and manufacturing process requirements for high-pressure pumps and their supporting motors. At present, small and micro seawater desalination devices are rarely used.

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