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Advanced treatment method and reuse process of acidic wastewater containing heavy metal ions

A heavy metal ion and advanced treatment technology, which is applied in metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of difficult demand for wastewater treatment process, cumbersome process technology, long treatment process, etc., and achieve automatic operation monitoring Ease of implementation, convenient operation and management, moderate engineering investment and operating costs

Active Publication Date: 2020-10-30
昆明标洁环保科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing non-ferrous metal smelting wastewater treatment advanced (reuse) treatment process also has long treatment process, cumbersome process technology, and with the introduction of the concept of zero discharge and the improvement of discharge indicators, the existing wastewater treatment process is becoming more and more difficult to demand

Method used

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  • Advanced treatment method and reuse process of acidic wastewater containing heavy metal ions
  • Advanced treatment method and reuse process of acidic wastewater containing heavy metal ions
  • Advanced treatment method and reuse process of acidic wastewater containing heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The raw data of wastewater from a zinc smelter are as follows:

[0038] The treated water volume is 4000m 3 / d-4800m 3 / d, the deep treatment water volume is 1500m 3 / d.

[0039] Water quality testing at the inlet of the wastewater treatment station (unit: mg / L)

[0040]

[0041] 1. After the wastewater produced by each production workshop is adjusted to the water quality and quantity by the regulating tank, the lime milk solution is added to the wastewater to control the pH value of the wastewater to about 10.5, and then an appropriate amount of polyferric chloride, PAM and heavy metal ions are added to capture and precipitate After the neutralization and precipitation reaction, most of the lead, zinc, copper, cadmium, arsenic plasma in the wastewater are removed, and the wastewater after neutralization and precipitation is discharged from the sedimentation tank and then enters the decalcification system for treatment; the sewage containing a large amount of heav...

Embodiment 2

[0049] The raw data of wastewater from a copper smelter are as follows:

[0050] The treated water volume is 1000m 3 / d, the deep treatment water volume is 1000m 3 / d.

[0051] Water quality testing at the inlet of the wastewater treatment station (unit: mg / L)

[0052]

[0053] 1. After the wastewater produced by each production workshop is adjusted to the water quality and quantity by the regulating tank, add lime milk solution to the wastewater to control the pH value of the wastewater to 10.5, and then add an appropriate amount of polyaluminum chloride, PAM and heavy metal ion trapping precipitant (DTCR), most of the lead, zinc, copper, cadmium, arsenic and other ions in the wastewater are removed after neutralization and precipitation reaction, and the wastewater after neutralization and precipitation is discharged from the effluent of the sedimentation tank and then enters the decalcification system for treatment; it contains a large amount of heavy metal ions The s...

Embodiment 3

[0061] Pilot-scale research on waste water laboratory of a lead-zinc smelter:

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Abstract

The invention discloses an advanced treatment method and a recycling technology for acidic wastewater containing heavy metal ions and belongs to the fields of water treatment technologies and resource utilization. The method and the technology disclosed by the invention are divided into three stages of treatment systems, namely a pretreatment system, a decalcification system and a membrane advanced treatment system. The pretreatment system is mainly used for removing most heavy metal, arsenic and fluorine ions and the like in wastewater by a neutralization precipitation method; the decalcification system is mainly used for removing calcium and magnesium ions added in the pretreatment system as well as a small part of residual heavy metal, arsenic and fluorine ions and the like by adding a biochemical preparation, so that the hardness of water is reduced to the maximum extent, the recycling efficiency of the wastewater is improved, fouling and clogging of pipelines are prevented and the pressure of a subsequent membrane system is relieved; the membrane advanced treatment system is mainly used for separating the water from the heavy metals, calcium and magnesium ions and other impurity ions as well as SS and other pollutants in the wastewater to obtain pure water so as to meet the water quality requirements of recycled water for boilers and the like. According to the advanced treatment method and the recycling technology, disclosed by the invention, the aims of classifying and recycling the wastewater and completely realizing zero discharge are achieved; the advanced treatment method and the recycling technology are easy to popularize and apply in the whole industry.

Description

technical field [0001] The invention particularly relates to an advanced treatment and reuse process of heavy metal-containing acid wastewater, and belongs to the field of water treatment technology and resource utilization. Background technique [0002] With the increasingly stringent requirements for the discharge of wastewater from non-ferrous metal smelting enterprises, the treatment of acid wastewater generated in the process of smelting production has been paid more and more attention. Heavy metal-containing acid wastewater from non-ferrous metal smelting mainly comes from the drainage of flue gas washing and purification equipment in the acid production process, process drainage in the smelting process, slag water quenching water, ground flushing water, etc., as well as waste liquid from accidents and abnormal production leaks Wait. The main pollution factors in heavy metal-containing acidic wastewater from non-ferrous metal smelting include heavy metal ions such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/16C02F101/22C02F101/20C02F101/10C02F101/14
CPCC02F1/001C02F1/24C02F1/441C02F1/442C02F1/444C02F1/5236C02F1/56C02F1/66C02F3/00C02F5/02C02F9/00C02F2101/101C02F2101/103C02F2101/14C02F2101/20C02F2101/22C02F2103/16C02F2301/08
Inventor 徐晓军刘伟余仁勇
Owner 昆明标洁环保科技有限责任公司