Cold rolled acid waste water disposal neutralizer in metallurgical industry and its process method

A technology of acid wastewater and metallurgical industry, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as leakage, achieve full reaction, reduce investment cost, and easily The effect of operational management

Inactive Publication Date: 2005-02-02
鞍山宏源环能工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the treatment of acid wastewater, some of them are diluted and discharged, and even if the treatment and discharge cannot be guaranteed to meet the standard, even if the standard is met, only the PH value is assessed, and the more important COD and SS assessments are missed.

Method used

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  • Cold rolled acid waste water disposal neutralizer in metallurgical industry and its process method

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Embodiment Construction

[0024] The present invention is realized like this, see figure 1 . The acid wastewater storage tank 10 supplies the acid wastewater to the pre-aeration tank 7 through the water pump 11 and the pipeline 12, and the high-pressure air aeration pipe 26 implements air aeration, and after the air aeration, the acid wastewater enters the neutralization reaction tank through the pipeline 35. The neutralizer passes through the pipeline 1 material trough 2 rotary valve 3 solid flow meter 4 feeding device 5 conveying belt 6 enters the neutralization reaction tank 8 for neutralization reaction, and at the same time the high-pressure air aeration pipe 9 implements direct aeration, divided into agitation plus aeration, mechanical agitation, Direct aeration has three reaction modes.

[0025] The reacted mixed solution passes through the buffer tank 23 and the advection sedimentation tank 24. At this time, the supernatant enters the filter 16 through the pipeline 30, and the sediment in the ...

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Abstract

The present invention relates to a neutralizing agent for treating acid waste water produced by cold-rolling process in metallurgical industry and its technological method. The neutralizing agent is a magnesium system material containing soft-burned magnesium powder oversize which is pulverized into 100-140 meshes by using Raymond mill, electrofused magnesium dust-removed ash, soft-burned magnesium powder and MgO whose content is above 40%. Its technological process includes the following steps: 1. supplying waste acid water into pre-aeration pool and executing aeration; 2. supplying the aerated acid water into neutralizing pool; 3. supplying neutralizing agent into neutralizing tower; 4. neutralizing reaction including three modes: mixing and aerating, mechanical mixing and single aeration; 5 advection pool deposition; 6. sludge and water separation treatment. The invention provides a neutralizing agent which can directly generate economic benefit, save investment, use low operation cost, and is simple in device structure, easy in operation management, has broad neutralizing agent source, and uses three waste resources to treat waste, and cancels the new water consume in lime cream and realizes the reuse for reclaimed water a technological method and a device thereof.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for purifying and treating industrial acidic wastewater, in particular to a neutralizer for treating cold-rolled acidic wastewater in the metallurgical industry and a process method thereof. Background technique [0002] At present, domestic enterprises that use acid in iron and steel metallurgy, chemical industry, chemical fiber and other production processes discharge acidic wastewater. In the prior art, when solving acidic wastewater, in principle, it is divided into two steps, and the concentration above 4% is required to be recovered; the concentration below 3-4% is discharged after neutralization treatment, and the neutralizer is expensive. Lime, limestone, soda, caustic soda, etc. The country's discharge requirements for acidic wastewater PH = 6-9 SS suspended solids ≤ 100mg / L, COD ≤ 100mg / L can meet the discharge standards. The treatment of acidic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F9/04
Inventor 王涛田玉玲
Owner 鞍山宏源环能工程有限公司
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