System for desalinating seawater by waste heat from power plant

A seawater system and power plant waste heat technology, applied in seawater treatment, heating water/sewage treatment, water/sewage treatment, etc., can solve the problems of low production efficiency, uneconomical, energy waste, etc., and achieve the effect of saving water treatment costs
CN102642883AActive Publication Date: 2012-08-22SHANGHAI FUBO ENVIRONMENTAL PROTECTION EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI FUBO ENVIRONMENTAL PROTECTION EQUIP
Publication Date
2012-08-22

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Abstract

The invention discloses a system for desalinating seawater by waste heat from a power plant. The system comprises a condenser circulating seawater taking branch system, a seawater multi-stage fresh evaporation branch system and a boiler smoke waste heat heating seawater circulating branch system which are divided according to the flow direction of seawater to be desalinated, and also comprises a vacuum pumping branch system, and a fresh water and seawater pollution discharge branch system, wherein the vacuum pumping branch system and the fresh water and seawater pollution discharge branch system are used as auxiliary systems connected with the seawater multi-stage fresh evaporation branch system. A multi-stage fresh evaporation method is adopted by the system. Because the waste heat of a condenser and boiler smoke of a power plant is utilized, energy sources needed for desalinating the seawater in a conventional distillation method are omitted, the operating cost in desalinating the seawater in a distillation method is reduced, and simultaneously the prepared fresh water is distilled water which can be partially used as supplementing water for the boiler of the power plant, the treatment cost for softening water in the power plant is saved, energy is saved, and the environment is protected.
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Description

technical field

[0001] The invention relates to the field of seawater desalination, in particular to a system for desalinating seawater by using waste heat from a power plant. Background technique

[0002] There are many methods for desalination of seawater, and the main ones that can achieve large-scale and industrialization are membrane method and thermal method. The membrane method is also called the reverse osmosis method, which utilizes the principle of osmotic pressure. This method uses a semi-permeable membrane to separate the fresh water from the salt. Under normal circumstances, a semipermeable membrane allows the solvent in the solution to pass through, but does not allow the solute to pass through. Due to the high salt content of seawater, if a semipermeable membrane is used to separate seawater from freshwater, the freshwater will diffuse to one side of the seawater through the semipermeable membrane, thereby raising the liquid level on the seawater side until ...

Claims

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