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Seawater desalination system based on wastewater multi-stage flash evaporation-low-temperature multi-effect distillation

A multi-effect distillation and multi-effect evaporator technology, applied in the field of seawater desalination, can solve the problems of high difficulty in waste heat utilization and high operating costs, achieve significant economic and social benefits, ensure low volatility, and reduce equipment investment costs Effect

Pending Publication Date: 2022-02-25
SHANGHAI POWER STATION ACCESSORY MACHINERY PLANT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problems solved by the invention are: high difficulty in utilizing the waste heat of waste water, and high operating costs of the conventional process of low-temperature multi-effect distillation

Method used

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  • Seawater desalination system based on wastewater multi-stage flash evaporation-low-temperature multi-effect distillation

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Embodiment

[0025] This embodiment provides a seawater desalination system based on wastewater flash evaporation-low temperature multiple-effect distillation, including multi-stage wastewater flash tanks, multiple-effect evaporators, and multiple The waste water return pump that transports the waste water to the next stage waste water flash tank, the waste water drainage pump used to discharge the flash evaporated waste water from the last stage waste water flash tank, the material sea water lift pump, the material sea water condenser, the cooling sea water lift pump , a cooling seawater condenser, a product water pump, a concentrated brine pump and a one-effect condensate pump, and the multi-stage wastewater flash tanks are connected in series through a wastewater return pump.

[0026] Among them, the first-stage wastewater flash tank is equipped with a high-temperature wastewater inlet, the steam connection pipe of the first-stage wastewater flash tank is connected to the shell of the fi...

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Abstract

The invention discloses a seawater desalination system based on wastewater multi-stage flash evaporation-low-temperature multi-effect distillation. The seawater desalination system comprises multiple stages of wastewater flash tanks, a multi-effect evaporator, a plurality of wastewater return pumps for conveying wastewater subjected to flash evaporation of the previous stage of wastewater flash tank to the next stage of wastewater flash tank, and a wastewater drainage pump for discharging wastewater subjected to flash evaporation of the last stage of wastewater flash tank, wherein the multiple stages of wastewater flash evaporation tanks are connected in series through a wastewater return pump, the first stage of wastewater flash evaporation tank is provided with a high-temperature wastewater inlet, a steam connecting pipe of the first stage of wastewater flash evaporation tank is connected with a shell of the first-effect evaporator, and steam connecting pipes of the wastewater flash evaporation tanks from the second stage to the last stage are sequentially connected with shells of the intermediate-effect evaporators. According to the seawater desalination system, waste water waste heat resources can be fully used for seawater desalination water production, heat in waste water is recycled, and the seawater desalination system can be popularized and applied to the fields of coastal steel, chemical engineering and the like.

Description

technical field [0001] The invention relates to a seawater desalination system based on waste water multistage flash evaporation-low temperature multi-effect distillation, belonging to the technical field of seawater desalination. Background technique [0002] Seawater desalination is a technology that separates fresh water from seawater. According to the different forms of energy in the desalination process, seawater desalination technology is mainly divided into distillation, which mainly consumes heat energy, and reverse osmosis, which mainly consumes electrical energy. [0003] Low-temperature multi-effect distillation (MED) seawater desalination technology is the second-generation thermal seawater desalination technology recognized in the industry, and it is the development direction of thermal seawater desalination technology. Because it usually uses high-quality turbine extraction steam as power steam, its operating cost is generally high and its engineering applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/06C02F1/04C02F103/08
CPCC02F1/06C02F1/04C02F2103/08Y02A20/124
Inventor 樊智锋曹开智王晓鹏吴彬彬
Owner SHANGHAI POWER STATION ACCESSORY MACHINERY PLANT CO LTD
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