Seawater desalinization method and seawater desalinization device

Abstract

The invention provides to a seawater desalinization method and a seawater desalinization device. The method comprises the steps as follows: firstly, introducing seawater passing through a heat exchanger into an evaporator directly, or running seawater in a fresh water circulation box containing another built-in heat exchanger, absorbing heat from the fresh water inside the fresh water circulation box and then introducing the seawater into the evaporator; secondly, evaporating the seawater in the evaporator; thirdly, condensing the water vapor generated from the seawater inside the evaporator in a condensation ejector, feeding back the latent heat of the water vapor to the fresh water to increase the temperature of the fresh water, sucking the water vapor into the evaporator by an ejection recirculating pump to exchange heat with the seawater and further lower the temperature of the fresh water, and receiving the latent heat fed back by the water vapor generated from the evaporation of seawater at the condensation ejector; fourthly, discharging strong brine generated from evaporation of the seawater through a strong brine discharge pump. The invention further provides a device for conducting the seawater desalinization method. The device is small in size and in space usage, stable and reliable in operation, high in work efficiency and large in evaporation capacity, low in power source consumption and good in quality of the fresh water produced by the device, and no air-suction device is required.

Description

technical field [0001] The invention relates to a seawater desalination method and device. Background technique [0002] "Water" is a big subject. Politicians say that "the world's future war for resources will be triggered by water"; scientists say that "water is irreplaceable" and "water is a scientific proposition that can never be completed"; economists predict that "after the energy crisis, the next One crisis will take its turn as a water crisis". A large number of data and papers show that if human beings continue to draw and use water as they are now, a series of serious consequences will occur; once the resources are exhausted, economic development, various ecological systems, and human health and survival will be threatened. It is predicted that in the 21st century, water will be as important to human beings as oil was to human beings in the 20th century, and water will become a precious commodity that determines the wealth of countries. The water industry wi...

AI Technical Summary

Problems solved by technology

At present, the most widely used desalination technology is high-pressure reverse osmosis technology. Although the cost of this technology has decreased, it still consumes more electric energy and other materials. The cost should not be underestimated, and the produced Freshwater quality is not ideal

Chinese patent 201210276447.2 discloses "a device and method for improving the efficiency of seawater desalination by using a heat pump". Reduced, but still not very ideal, low thermal energy recycling

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