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Device capable of realizing zero emission of high-salt wastewater of thermal power plants

A high-salt wastewater and zero-discharge technology, applied in the field of electric power, can solve the problems of waste of water resources, failure to consider the recycling of circulating water, complex components of power plant wastewater, etc., and achieve the effect of low operating costs

Inactive Publication Date: 2019-12-03
陆霖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This method has a good effect on the removal of calcium and magnesium ions in wastewater, but the composition of power plant wastewater is complex, and the removal of calcium and magnesium ions alone cannot make the wastewater meet the discharge requirements; moreover, this method does not consider the recycling of circulating water, which will lead to Cause a lot of waste of water resources

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  • Device capable of realizing zero emission of high-salt wastewater of thermal power plants

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Effect test

Embodiment 1

[0016] A device for realizing zero discharge of high-salt wastewater in a thermal power plant, which sequentially includes an evaporator, a salt crystallizer, a centrifugal dehydrator, a fluidized bed drying device, and a salt bin;

[0017] The outlet of the high-salt wastewater is connected to the inlet of the evaporator, the steam outlet of the evaporator is connected to the inlet of the supplementary water of circulating water, and the outlet of the waste water of the other evaporators is connected to the inlet of the salt crystallizer;

[0018] The fresh water outlet of the salt crystallizer is connected to the inlet of circulating supplementary water, the outlet of the remaining solid product of the salt crystallizer is connected to the inlet of the centrifugal dehydrator; the outlet of pure NaCl of the centrifugal dehydrator is connected to the inlet of the fluidized bed drying device; the fluidized bed drying The outlet of the device is connected with the inlet of the sa...

Embodiment 2

[0026] A device for realizing zero discharge of high-salt wastewater in a thermal power plant, which sequentially includes an evaporator, a salt crystallizer, a centrifugal dehydrator, a fluidized bed drying device, and a salt bin;

[0027] The outlet of the high-salt wastewater is connected to the inlet of the evaporator, the steam outlet of the evaporator is connected to the inlet of the supplementary water of circulating water, and the outlet of the waste water of the other evaporators is connected to the inlet of the salt crystallizer;

[0028] The fresh water outlet of the salt crystallizer is connected to the inlet of circulating supplementary water, the outlet of the remaining solid product of the salt crystallizer is connected to the inlet of the centrifugal dehydrator; the pure NaCl outlet of the centrifuge is connected to the inlet of the fluidized bed drying device; the fluidized bed drying device The outlet of the outlet is connected with the inlet of the salt bin. ...

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Abstract

The invention discloses a device capable of realizing zero emission of high-salt wastewater of thermal power plants. The device comprises an evaporator, a salt crystallizer, a centrifugal dehydrator,a fluid bed drying device and a salt bin; a discharging opening of the high-salt wastewater is connected with an inlet of the evaporator, and a vapor outlet of the evaporator is connected with a circulating supplementary water inlet; a wastewater outlet of the evaporator is connected with an inlet of the salt crystallizer, and a fresh water outlet of the salt crystallizer is connected to a circulating supplementary water outlet; a residual solid product outlet of the salt crystallizer is connected with an inlet of the centrifugal dehydrator, and a pure sodium chloride discharging opening of the centrifugal dehydrator is connected with an inlet of the fluid bed drying device; and a discharging opening of the fluid bed drying device is connected with an inlet of the salt bin. The device is low in operation cost, heavy metal ions and organic matter in the wastewater can be treated, regular cleaning and maintenance are not needed, and the device is suitable for the power plants of different scales; and products treated through the device are fresh water, sludge and crystal salt, and zero emission of the wastewater is truly realized.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a device for realizing zero discharge of high-salt wastewater in thermal power plants. Background technique [0002] Most power plants use cooling towers to cool the steam generated by power generation, and how to recycle a large amount of waste water generated by the cooling tower circulating water system is a problem that power plants need to solve. Hypersaline wastewater is a major wastewater type, especially in areas with high saline quality. How to deal with high-salt wastewater to realize the recycling of wastewater and even zero discharge is the goal of many power plants. [0003] At present, the lime-glauber's salt purification technology is mainly used for the treatment of industrial wastewater. This method is to use lime (Ca(OH)2) to remove the magnesium ions in the wastewater by Mg(OH)2 precipitation, recover the mother liquor, and pass it into The boiler flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D3/06C02F101/20C02F101/30
CPCC01D3/06C02F1/048C02F1/38C02F9/00C02F2001/5218C02F2101/20C02F2101/30
Inventor 陆霖
Owner 陆霖