Improved water desalination system

Abstract

A system and method for desalination of seawater W having an original water salinity and an original water concentration of scale forming components, the system comprising: a pre-treatment sub-system for at least partial removal from said water W of said scale forming components, producing thereby a pre-treated feed water having a first concentration of scale forming components lower than said original concentration of scale forming components; a forward feed flow multi-effect evaporator adapted for distillation of said pre-treated feed water, producing thereby main desalted water product WM having a desalted water salinity lower than said water salinity, and main brine having a salt concentration of approximately 10%; a concentrator adapted for receiving therein said main brine and concentrating it, producing thereby more concentrated brine with an increased salt concentration of approximately 20%-22%, and releasing a first additional desalted water product W1; and a crystallizer for receiving said more concentrated brine, adapted for crystallization thereof to obtain at least solid salt products and releasing a second additional desalted water product W2.

Description

technical field [0001] The present invention relates to desalination systems and methods, particularly methods using multiple effect evaporators. Background technique [0002] Distillation of water, which is a common method of desalination, is the process of removing various soluble substances (eg, salts, pollutants, etc.) from water containing these substances, leaving clean and usually potable water. One known method of achieving this distillation relies on the evaporation of water, much like the accumulation of salt and scale on the bottom of an electric kettle after the water has been evaporated. During this process during water evaporation, non-volatile soluble matter remains as a solid residue, usually in the form of salt and scale, and is disposed of. The water vapor can then be condensed back into a liquid state, producing water free of contaminants. [0003] One problem in the above process is the formation of scale on the surface of the evaporation equipment, whi...

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Problems solved by technology

[0004] Moreover, the disposal of residual brine (i.e., the concentrated solution of salt remaining after the distillation process) can lead to ecological problems

Furthermore, the treatment of brine poses significant costs and challenges to the desalination industry, which increases the time required for the permitting and construction of new equipment and results in higher costs for the water treated by it

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