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Waste water treatment, recovery and utilization for power plant

A power plant wastewater and process technology, which is applied in the fields of neutralization water/sewage treatment, permeation/dialysis water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The problem of low wastewater reuse rate, etc., achieves the effects of excellent and stable water quality, good effluent stability, and high wastewater reuse rate

Inactive Publication Date: 2006-05-31
张宝泉 +2
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a power plant wastewater treatment and reuse process to overcome the complicated procedures in the prior art, high requirements on the water quality of the treated wastewater during pretreatment, general water quality indicators after pretreatment, and high input costs , poor safety and stability of pretreatment operation, low wastewater reuse rate and high operating costs

Method used

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Embodiment Construction

[0017] Hereinafter, the present invention will be described in detail using examples.

[0018] The present invention comprises the following steps:

[0019] A Collect the waste water into the sump after classified treatment, add medicine and adjust the pH value in the sump,

[0020] In this step, the waste water comes from the classification treatment system of industrial waste water, domestic sewage, coal water, chemical waste water and circulating sewage;

[0021] In this step, when dosing, the flocculant is PAC, the dosage is 15mg / L, the pH value is adjusted to about 7.2, and then the oxidant NaClO is added at a dosage of 8mg / L;

[0022] B. Wastewater is lifted by a lift pump and sent to a microfiltration membrane filtration system after passing through a microflocculator. The filtration cycle is 50 minutes, so that the effluent water quality can reach SDI index ≤ 2, turbidity ≤ 0.2NTU, working pressure is about 1.0bar, and gas backwashing strength The pressure is about 5...

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Abstract

A waste-water treatment and recovery for power plant is carried out by classification treating for waste water, gathering it into water-collecting pool, adding into medicine, adjusting pH value, entering the waste water into micro-filter membrane filtering system from micro-coagulator, flowing micro-filtered water into medium water tank, delivering it into safety filter by lifting pump, inverse penetration treating by high-pressure pump, flowing concentrated water into chemical neutralization pool and flowing fresh water into recovering pipe net of factory. Its advantages include low cost, better water quality, safety and stability and high recovery efficiency.

Description

Technical field: [0001] The invention relates to the technical field of zero-discharge comprehensive treatment of power plant waste water, in particular to a power plant waste water treatment and reuse process. Background technique: [0002] As a large water consumer, thermal power plants produce a large amount of wastewater. If they are discharged directly without treatment, on the one hand, they will cause serious harm to the environment. Great waste, the pollution of water environment by power plant wastewater and the waste of water resources have become problems restricting the sustainable development of cities and electric power. In view of this, how to reduce the water consumption of thermal power plants and at the same time, how to carry out zero-discharge treatment of power plant wastewater has become an urgent problem to be solved by the industry. [0003] Power plant wastewater includes industrial wastewater, domestic sewage, coal water, and chemical wastewater. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/44C02F1/66
Inventor 张宝泉路满绪王毅
Owner 张宝泉
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