Process for treating waste water with coal ash

A waste water treatment and waste water technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of secondary pollution, poor technical feasibility and large area , to achieve the effect of saving consumption

Inactive Publication Date: 2002-02-06
LEFUMEN WATER TREATMENT ENG SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the conventional flocculation-clarification or flocculation-clarification-filtration process is adopted, it is denied due to large area, poor technical feasibility, secondary pollution and inability to recover fine coal dust.

Method used

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  • Process for treating waste water with coal ash
  • Process for treating waste water with coal ash

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Embodiment

[0038] Please combine figure 1 As shown, the coal conveying system collects the coal flushing wastewater (washing water) into the specially designed coal slime pool through the open drainage ditch, and first passes through the pre-sedimentation tank 3 to trap larger coal chips to prevent the lifting pump from being stuck. After preliminary precipitation, a large amount of coal flushing wastewater containing fine particles enters the neutralization aeration tank 4. When the water level reaches a certain high level, the specially designed magnetic column liquid level gauge sends out an alarm signal, and manual dispensing, dosing, and compressed air are carried out. Stir. In the neutralization aeration tank 4, drop into the waste sulfuric acid of 10% concentration earlier, (in the experiment of the present invention, adopt the waste acid discharged from the pickling steel plate of Shanghai No. "Effect, the general dosing end point is to control the PH value of the pool water to ...

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Abstract

A process for treating waste water containing coal ash generated by flushing coal includes collecting said waste water in deposition pool, depositing, introducing the supernatant into neutralizing and aerating pool, adding 5-15% waste sulfuric acid for acidifying it, adding alkaline calcium carbide dreg liquid for neutralizing and aerating it, adding 10% sodium hypochlorite for disinfecting it, filtering and discharge. Its advantages are high effect and saving water.

Description

technical field [0001] The invention relates to sewage treatment of power plants using coal as fuel, and more specifically refers to a coal ash wastewater treatment method. Background technique [0002] As we all know, the shortage of water resources and the pollution of effluent waste water have become a worldwide problem, and have attracted the attention of all human beings. Although our country has done a lot of work in the prevention and control of water pollution, and laws and regulations related to water have been promulgated and implemented one after another, the problem of water pollution in our country is still relatively serious. According to preliminary statistics, about 70% of the waste water in the country is directly discharged into rivers, rivers, lakes, and seas without treatment, causing some water resources to be seriously polluted, resulting in the loss of due use value, resulting in the reduction of available water resources. . [0003] In the water man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F9/04
Inventor 石小牛
Owner LEFUMEN WATER TREATMENT ENG SHANGHAI
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