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Method for removing and recovering copper and zinc in wastewater of copper-zinc catalysts

A catalyst, copper-zinc technology, applied in the field of industrial wastewater treatment, can solve the problems of excessive discharge of copper and zinc, achieve high purity, prolong the cleaning cycle, and avoid frequent shutdowns for cleaning

Active Publication Date: 2013-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a method for treating and recovering copper and zinc in catalyst wastewater by using ultrafiltration membrane filtration technology, the purpose of which is mainly to solve the problem of excessive discharge of copper and zinc in the existing inorganic catalyst wastewater discharge process , while recovering copper and zinc resources in wastewater containing copper and zinc catalysts

Method used

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  • Method for removing and recovering copper and zinc in wastewater of copper-zinc catalysts

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The water quality characteristics of the copper-zinc catalyst wastewater are: wastewater pH 8, COD cr 40mg / L, SS 20mg / L, Cu 20mg / L, Zn 30mg / L, NH 4 -N2 mg / L. The processing flow is attached figure 1 shown.

[0034] Copper-zinc catalyst waste water A directly enters the clarification and separation tank through route D, and the upper clarified liquid enters ultrafiltration pump 2 through route G to be pressurized and then undergoes ultrafiltration membrane system 3 for cross-flow filtration to separate copper-zinc colloids. The produced water meets the discharge standard and is concentrated The final copper-zinc-containing colloid is returned to the clarification separation unit for sedimentation and separation to recover copper and zinc. In this process, PPESK hollow fiber ultrafiltration membrane with a pore size of 0.01 μm is used, and the operating flux of the ultrafiltration membrane is 300L / m 2 h, after the time interval of alternating water inflow at both end...

Embodiment 2

[0037] Water quality characteristics of wastewater containing copper and zinc catalysts: wastewater pH5, COD cr 15mg / L, Cu 200mg / L, Zn 50mg / L, NH 4 -N 10mg / L, the treatment process is attached figure 1 shown.

[0038] Copper-zinc catalyst wastewater A enters the pH adjustment tank through route C to adjust the pH of the wastewater to 9 and directly enters the clarification and separation tank, and the upper clarified liquid enters the ultrafiltration pump 2 through route G. After pressurization, the ultrafiltration membrane system 3 is used for cross-flow filtration to separate copper and zinc. Colloid, the product water reaches the discharge standard, and the concentrated copper-zinc-containing colloid is returned to the clarification separation unit for sedimentation and separation to recover copper and zinc. In this process, a PTFE hollow fiber ultrafiltration membrane with a pore size of 0.01 μm is used, and the operating flux of the ultrafiltration membrane is 500L / m ...

Embodiment 3

[0041] Water quality characteristics of wastewater containing copper and zinc catalysts: wastewater pH 12, COD cr 60mg / L, Cu 200mg / L, Zn 50mg / L, NH 4 -N 5mg / L, the treatment process is attached figure 1 shown.

[0042] Copper-zinc catalyst waste water A enters the pH adjustment tank through route C to adjust the pH of the waste water to 7-11 and directly enters the clarification and separation tank, and the upper clarified liquid enters the ultrafiltration pump 2 through route G to pressurize and then proceed to the ultrafiltration membrane system 3 for cross-flow filtration and separation Copper-zinc colloid, the produced water meets the discharge standard, and the concentrated copper-zinc-containing colloid is returned to the clarification separation unit for sedimentation and separation to recover copper and zinc. In this process, a PVDF hollow fiber ultrafiltration membrane with a pore size of 0.015 μm is used, and the operating flux of the ultrafiltration membrane is 60...

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Abstract

The invention discloses a method for removing and recovering copper-zinc ions in wastewater from production processes of catalysts taking copper and zinc as active components. Process flows of alkali regulating, ultrafiltration and sedimentation are adopted in the method. By utilizing the process flows, the copper-zinc ions in the wastewater can be effectively removed; the copper-zinc ions in the wastewater can be concentrated or copper-zinc colloidal materials can be effectively separated in the meantime; and copper-zinc compound after being subjected to separation or concentration can be used for the production processes of copper-zinc catalysts again. The flows of the method disclosed by the invention have the process characteristics of high separating efficiency, stable product water quality, high economic benefit, no environmental pollution and no poison.

Description

technical field [0001] The invention relates to a method for treating and recovering copper-zinc-containing wastewater by using membrane separation technology, in particular to a method for recovering copper and zinc in industrial wastewater during the preparation of copper-zinc catalysts, belonging to the field of industrial wastewater treatment. Background technique [0002] A large number of industrial processes, such as the production of copper-containing zinc-containing catalysts, metal smelting, electronics, instrumentation and other industries, are prone to produce a large amount of wastewater containing copper and zinc metal ions. The discharge of such wastewater into water bodies will seriously affect the quality of water and the environment. Cause pollution, when the copper content in water reaches 0.01mg / L, it will have a significant inhibitory effect on the self-purification of the water body; if it exceeds 3.0mg / L, it will produce peculiar smell; if it exceeds 15...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/44
Inventor 李正琪杨永强谢梓峰王娟
Owner CHINA PETROLEUM & CHEM CORP
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