Advanced treatment and recycling process for wastewater containing heavy metal ions

A heavy metal ion and advanced treatment technology, applied in metallurgical wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of high investment and operation costs, cumbersome pH value control, cumbersome operation and management, etc., to achieve Moderate engineering investment and operating costs, high removal rate of heavy metal ions, and convenient operation and management

Inactive Publication Date: 2012-07-25
郑州鸿跃环保科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the pH value control is a bit cumbersome, and the wastewater after treatment needs to be adjusted before it can be discharged.
[0009] (2) Sulfide precipitation method: adding sulfide to make the heavy metal ions in the wastewater generate sulfide precipitation and remove it. Compared with the neutralization precipitation method, the advantage of the sulfide precipitation method is that the solubility of heavy metal sulfide is higher than that of its hydroxide The solubility is lower, and the reaction pH value is between 7-9. Generally, the treated wastewater does not need to be neutralized, and the treatment effect is better, but the disadvantages of the sulfide prec

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  • Advanced treatment and recycling process for wastewater containing heavy metal ions
  • Advanced treatment and recycling process for wastewater containing heavy metal ions
  • Advanced treatment and recycling process for wastewater containing heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The raw data of wastewater from a lead smelting enterprise are as follows: the advanced treatment capacity is 80m3 / h

[0055] Monitor water quality at the total discharge outlet of the workshop (unit: mg / L)

[0056] project

pH

suspended matter

CODcr

total copper

total zinc

total lead

Total arsenic

Total Cadmium

the first time

3.8-4.2

120

178

2.5

126

6.0

1.92

6.64

[0057] 1. Automatically adjust the water quality and quantity of acidic wastewater such as flue gas washing water and leaked waste liquid in the production system through the electromagnetic flowmeter. According to the content of heavy metals in the water quality, add lime milk solution to adjust the pH value to 9.0 through the pH meter, and then wait for each cubic meter to be treated The water is controlled by an electromagnetic flowmeter and 200 ml of iron-based polymer flocculant polyferric sulfate (P...

Embodiment 2

[0063] The raw data of wastewater from a lead smelting enterprise are as follows:

[0064] The deep treatment capacity is 80m3 / h

[0065] Monitor water quality at the total discharge outlet of the workshop (unit: mg / L)

[0066] project

pH

suspended matter

CODcr

total copper

total zinc

total lead

Total arsenic

Total Cadmium

the second time

4.1

135

165

2.9

129

7.2

2.23

7.21

[0067] Automatically adjust the water quality and quantity of acidic wastewater such as flue gas washing water and leaked waste liquid in the production system through an electromagnetic flowmeter. According to the content of heavy metals in the water quality, add lime milk solution to adjust the pH value to 9.5 through a pH meter, and then pass through each cubic meter of water to be treated. The electromagnetic flowmeter controls the addition of 200 ml of iron-based polymer flocculant polyferric sulf...

Embodiment 3

[0073] The raw data of wastewater from a lead smelting enterprise are as follows 5.3.1:

[0074] The deep treatment capacity is 80m3 / h

[0075] 5.3.1-Water quality monitoring at the total discharge outlet of the workshop (unit: mg / L)

[0076] project

pH

suspended matter

CODcr

total copper

total zinc

total lead

Total arsenic

Total Cadmium

the third time

3.8

132

186

3.1

119

5.8

2.07

6.30

[0077] Automatically adjust the water quality and quantity of acidic wastewater such as flue gas washing water and leaked waste liquid in the production system through electromagnetic flowmeters. According to the content of heavy metals in the water quality, add lime milk solution to adjust the pH value to 10.0 through the pH meter, and then pass through each cubic meter of water to be treated. The electromagnetic flowmeter controls the addition of 200ml of iron-based polymer flocculant p...

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PUM

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Abstract

The invention discloses an advanced treatment and recycling process for wastewater containing heavy metal ions, which comprises the following steps of: primarily sedimenting wastewater of lead, zinc and other smelting enterprises respectively to remove most lead, zinc and arsenic in the wastewater; secondarily sedimenting to basically remove lead, cadmium, mercury, arsenic, zinc, copper, nickel, cobalt and other heavy metals in the wastewater; carrying out ceramic microfiltration membrane microfiltration treatment to remove SS in the wastewater to below 1mg/L so as to meet the requirement on quality of supplement water for circulating and cooling water, and the water is used as low-quality reuse water. The process disclosed by the invention is convenient to operate and manage, the operation is automatized, monitoring is easy to realize, the engineering investment and the operation cost are moderate, the heavy metal ion removal rate is high, and the process is easy to apply and popularize in the whole industry.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to advanced treatment and recycling process of waste water containing heavy metal ions produced by lead-zinc smelting enterprises. Background technique [0002] With the increasingly stringent requirements for the discharge of sewage and wastewater in lead and zinc smelting enterprises, the treatment of sewage acid wastewater generated in the process of smelting production has been paid more and more attention. The heavy non-ferrous smelting wastewater represented by lead and zinc mainly comes from the cooling drainage of furnace equipment, with a large discharge (about 40% of the total discharge); the discharge of flue gas washing and purification devices such as smelting and acid making, various heavy metals and A large amount of pollutants such as acids, alkalis and non-metals are discharged; the molten slag water quenching cooling water in the smelting process...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/16C02F101/20
CPCC02F2101/20B01D61/16C02F1/444B01D61/147B01D2311/04C02F2103/16
Inventor 郑黎陶伟常醒程辉
Owner 郑州鸿跃环保科技有限公司
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