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med-tvc seawater desalination combined system using waste heat from power station

A combined system and seawater technology, applied in seawater treatment, water/sewage treatment, general water supply saving, etc., to achieve the effect of lowering flue gas temperature, lowering the cost of producing fresh water, and high smoke and dust emission standards

Inactive Publication Date: 2018-07-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of fresh water demand and energy supply in the seawater desalination process, and reasonably recycle and utilize the waste heat and energy of the power station, the present invention provides a combined MED-TVC seawater desalination system utilizing the waste heat of the power station

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  • med-tvc seawater desalination combined system using waste heat from power station

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0024] Such as figure 1 Shown is a combined MED-TVC seawater desalination system utilizing waste heat from a power station, which includes a multi-effect distillation seawater desalination unit, boiler flue gas waste heat recovery and utilization unit, and a steam ejector 7;

[0025] The boiler flue gas waste heat recovery and utilization unit includes a second heat exchanger 6, the second heat exchanger 6 adopts a finned tube heat exchanger, which is connected between the air preheater and the electrostatic precipitator system of the power station, or connected to the Between the electrostatic precipitator system and the wet desulfurization system, the flue gas flows through the second heat exchang...

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Abstract

The invention relates to an MED-TVC seawater desalination combination system by means of power station waste heat. Seawater is preprocessed, conveyed to a condenser to be preheated and then further preheated through a first heat exchanger and a second heat exchanger in sequence, and enters N-effect evaporators through pipelines in a shunting mode, wherein a heat source of the first heat exchanger is condensation water of the first-effect evaporator, and a heat source of the second heat exchanger is low-temperature hot flue gas flowing inside the second heat exchanger; meanwhile, low-temperature steam extraction and middle-effect steam of a turbine are introduced to the first-effect evaporator through a steam ejector, a heat source of multi-effect distillation seawater desalination is provided, seawater is distillated on the basis of the MED-TVC technology to obtain desalted water, the condenser condenses steam flowing out of the last-effect evaporator and preheats seawater, and strong brine in the Nth-effect evaporator is conveyed to a salt chemical engineering technological unit. Power station low-temperature flue gas and low-pressure steam extraction waste heat of the turbine are recycled, seawater desalination production is achieved, the seawater desalination cost is effectively lowered, and no secondary pollution is generated.

Description

technical field [0001] The invention belongs to the technical field of recovery and utilization of power station waste heat and waste energy resources and seawater desalination, and in particular relates to a MED (Multiple Effect Distillation)-TVC (Steam Ejector) seawater desalination combined system utilizing power station waste heat. Background technique [0002] The total amount of water resources in my country ranks sixth in the world, but the per capita water resources ranks 108th in the world, and the per capita water resources only account for a quarter of the world's per capita water resources. It is a country with severe shortage of water resources. With the development of industrialization and population growth, the demand for water resources will gradually increase. [0003] 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/16C02F103/08
CPCC02F1/16C02F2103/08Y02A20/124
Inventor 杜小泽薛媛杨立军周雅君
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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