Multiple-effect distillation seawater desalination system adopting power station waste heat

A multi-effect distillation and waste heat technology, applied in the field of multi-effect distillation seawater desalination system, can solve the problems of high maintenance cost, large floor area, increased pressure drop, etc., and achieve the goal of reducing fresh water cost, reducing water consumption, and reducing flow rate Effect

Inactive Publication Date: 2016-06-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

At the same time, there are still some problems to be solved during the operation of the GGH (flue gas heat exchanger) in the existing coal-fired power plants at this stage: (1) The temperature of the flue gas after reheating by the GGH is about 80°C, which is much lower than that of the wet method Flue gas acid dew point temperature after desulfurization, so downstream of FGD (flue gas desulfurization), there is still flue and chimney pitting corrosion

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  • Multiple-effect distillation seawater desalination system adopting power station waste heat
  • Multiple-effect distillation seawater desalination system adopting power station waste heat

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[0021] The present invention will be further described below in conjunction with the drawings and specific embodiments. It should be emphasized that the following description is only exemplary, and is not intended to limit the scope of the present invention and its application.

[0022] Such as figure 1 Shown is a multi-effect distillation seawater desalination system using waste heat from a power station, the system comprising a multi-effect distillation seawater desalination unit 1 and a flue gas waste heat recovery unit 2;

[0023] The flue gas waste heat recovery and utilization unit 2 includes a heat exchanger 10, the flue gas inlet 3 of the heat exchanger 10 is connected to the flue gas outlet of the air preheater of the coal-fired power plant, and the flue gas outlet 4 of the heat exchanger 10 is connected to the static electricity. The flue gas inlet of the dust removal system is beneficial to achieve low and low temperature dust removal and effectively prevent the electric...

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Abstract

The invention relates to a multiple-effect distillation seawater desalination system adopting power station waste heat. Seawater is pretreated through a pretreatment system and then sent to a condenser, and seawater flowing out of the condenser is divided by a pipeline to enter an N-effect evaporator and a heat exchanger; meanwhile, seawater is heated by the heat exchanger by means of low-temperature smoke, smoke waste heat is recovered to obtain steam, steam is introduced into a first-effect evaporator to provide a heat source for multiple-effect distillation seawater desalination, desalted water is obtained through desalination treatment of seawater by means of the low-temperature multiple-effect distillation technique, condensation of steam flowing out of a final-effect evaporator and seawater preheating are conducted by means of the condenser, and strong brine in the N-effect evaporator and the heat exchanger is sent to a salt chemical engineering technological unit. By recycling low-temperature smoke waste heat of coal-fired power plants, low-cost seawater desalination production is achieved, and secondary pollution is avoided in the whole process.

Description

technical field [0001] The invention belongs to the technical field of recovery and utilization of waste heat and energy resources of coal-fired power stations and seawater desalination, and in particular relates to a multi-effect distillation seawater desalination system utilizing waste heat of power stations. Background technique [0002] my country's total water resources ranks sixth in the world, but its per capita water resources ranks 108th in the world, making it a country with severe shortage of water resources. The "Twelfth Five-Year Plan" for the Development of Seawater Desalination Industry pointed out that seawater desalination water is a new water source that can be used for production and living. As an important supplement and strategic reserve of water resources, seawater desalination should be included in the overall planning and allocation of water resources. Seawater desalination industry is a strategic emerging industry and a new economic growth point. H...

Claims

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Application Information

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IPC IPC(8): C02F1/16C02F103/08
CPCC02F1/16C02F2103/08C02F2201/002Y02A20/124Y02P20/10
Inventor 杜小泽薛媛杨立军周雅君
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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