Acidic heavy metal wastewater treatment method and system

A wastewater treatment system and wastewater treatment technology, applied in water treatment parameter control, water/sewage multi-stage treatment, neutralized water/sewage treatment, etc., can solve the problems of low level of automation control, unstable water quality, waste of resources, etc. problems, to achieve the effect of reducing environmental pollution and waste of resources, reducing chemical consumption and labor costs, and achieving stable water quality

Pending Publication Date: 2022-04-19
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (1) The density of sludge is low, and the treated water quality is unstable;
[0007] (2) The amount of slag produced is large, and storage and transportation are difficult;
[0008] (3) The operating environment is harsh and the level of automation control is low;
[0009] (4) The fouling problem is prominent, and the pipeline is seriously corroded;
[0010] (5) Valuable metal precipitation slag is sent to the slag dump as solid waste, causing waste of resources and environmental pollution

Method used

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  • Acidic heavy metal wastewater treatment method and system
  • Acidic heavy metal wastewater treatment method and system
  • Acidic heavy metal wastewater treatment method and system

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Effect test

Embodiment 1

[0037] see figure 1 , a method for treating acidic heavy metal wastewater in the present embodiment, comprising the steps of:

[0038] Step S1, wastewater adjustment link: the acidic heavy metal wastewater is adjusted in the homogenization tank for equalization and homogeneity, and the residence time in the homogenization tank is 3 to 12 hours;

[0039] Step S2, the vulcanization reaction link: the acidic heavy metal wastewater flows into the vulcanization reactor by gravity using the height difference to carry out the vulcanization reaction, and the dosage of the vulcanization agent in the vulcanization reactor is adjusted by controlling the ORP value;

[0040] Step S3, solid-liquid separation link: waste water enters the vulcanization sedimentation tank, PAM flocculant (polyacrylamide) is added to the vulcanization sedimentation tank, and solid-liquid separation is realized by gravity sedimentation, and part of the concentrated mud in the vulcanization sedimentation tank is ...

Embodiment 2

[0051] see figure 2 The present invention provides an acidic heavy metal wastewater treatment system based on the above-mentioned embodiment acidic heavy metal wastewater treatment method, comprising a homogenization tank, a vulcanization reactor, a vulcanization sedimentation tank, a neutralization reactor, a post-neutralization reaction sedimentation tank and The clean water tank, the vulcanization sedimentation tank and the post-neutralization reaction sedimentation tank are all connected to the PAM configuration tank, the neutralization reactor is connected to the lime / slurry mixer, and the lime / slurry mixer is connected to the chemical automatic configuration delivery system, and the sulfuration sedimentation tank After neutralization and reaction, mud pumps are installed in the sedimentation tanks, and the output end of the mud pumps is connected to the lime / slurry mixer through pipelines.

[0052] see image 3 , the automatic preparation and dosing system of the medic...

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Abstract

The invention discloses an acidic heavy metal wastewater treatment method and system.According to the acidic heavy metal wastewater treatment method and system, by arranging an adjusting system and a reaction system, a precipitation system capable of being automatically controlled and the like, system operation is more efficient and intelligent, and by arranging an automatic agent preparing and adding system, accurate agent adding and intelligent automatic operation in the reaction system are facilitated; the method has the advantages that chemical consumption and labor cost are reduced, the water treatment capacity is greatly improved, the sludge concentration is improved, meanwhile, the scaling phenomenon in a reaction system is greatly reduced, the scale cleaning period is prolonged by more than 50%, and the operation and maintenance cost is reduced.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating acidic heavy metal wastewater and a system using the method. Background technique [0002] Acidic heavy metal wastewater is the largest amount of wastewater produced in the mining and metallurgy industry. It contains a large amount of heavy metal ions and sulfate ions, and has the characteristics of high acidity, poor biodegradability, and refractory degradation. At present, the treatment technologies for acidic heavy metal wastewater at home and abroad mainly include: Adsorption method, microbial method, lime neutralization method, lime-iron (aluminum) salt precipitation method, ion exchange method, iron filings replacement method, etc. Among them, lime neutralization and its derivation (improvement) method mainly increase the pH of acidic wastewater by adding an alkaline neutralizer, and make the heavy metal ions in the wastewater form hydroxides or car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/122B01D53/78B01D53/40C02F101/20
CPCC02F9/00C02F11/122B01D53/78B01D53/40C02F2209/04C02F2001/007C02F1/56C02F1/66C02F2101/20
Inventor 刘艳丽刘峰彪杨晓松赵志龙郑曦林星杰杨小明张凯乔继扬王纪勇王志国
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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