Method for spraying and desalting through residual pressure of reverse osmosis concentrated water

Abstract

The invention establishes a method for treating waste concentrated saltwater of reverse osmosis systems. The method mainly comprises the following steps that: the residual pressure of concentrated water produced by the self of a reverse osmosis system during water production is utilized to form high-salt spray so as to save power needed by conventional atomization; tiny water droplets quickly evaporate in floating air so as to separate water, salt and other impurities; meanwhile, organic matter contained by the water is oxidized to be carbon dioxide; vapor is input into a condensing chamber to turn into pure water, while salt and high-power tail water fall to the bottom of a separation chamber; the tail water and initial inflow water are mixed and circulated and then continue to be atomized and concentrated to a saturation state; the contained salt is subjected to heat-exchange condensation and then crystallization and precipitation; and water purification and salinity removal of reverse osmosis concentrated water are finally realized. The desalting and pollutant-reducing method for reverse osmosis concentrated water is suitable for the separation of the waste concentrated saltwater produced by every type of reverse osmosis systems.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and relates to the purification of concentrated water of reverse osmosis systems in the fields of industrial water treatment, environmental pollution control, sea water and brackish salt water desalination. More specifically, it is a spray desalination method of reverse osmosis concentrated water residual pressure. Background technique [0002] The reverse osmosis technology uses external force (to overcome the osmotic pressure) and with the help of the selective retention effect of the membrane to separate the solute in the solution from the solvent, so as to achieve the purpose of pure water quality. This technology has been widely used in industrial water treatment, environmental pollution control, seawater and brackish salt water desalination, etc. However, in the process of treatment, affected by factors such as membrane material and water quality, the production of desalinated water is a...

AI Technical Summary

Problems solved by technology

Since there is no effective way to deal with the concentrated water problem at present, the cost of water production during the treatment of the reverse osmosis device is increased, and a large amount of energy is wasted at the same time. The environmental pollution of concentrated brine is still a difficult problem that cannot be effectively solved.

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