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Method and device for refining copper heavy metal in pickling copper wastewater

A technology for heavy metals and waste water, applied in the fields of metallurgical waste water treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as the inability to achieve a wide range of copper ions, and achieve the effect of solving difficult sewage treatment, good removal effect, and simple equipment

Pending Publication Date: 2021-12-21
迈玺(深圳)智能动力有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the existing pickling copper wastewater treatment technology cannot realize the treatment of a wide range of copper ion concentration, and is not suitable for the treatment of pickling copper wastewater with extremely dilute concentration of copper ions

Method used

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  • Method and device for refining copper heavy metal in pickling copper wastewater
  • Method and device for refining copper heavy metal in pickling copper wastewater
  • Method and device for refining copper heavy metal in pickling copper wastewater

Examples

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Effect test

Embodiment 1

[0067] This embodiment is the use of this process in the pickling copper workshop of Luofan Environmental Protection Technology Co., Ltd., and this embodiment adopts such as figure 1 The process flow chart, that is, the low-concentration pickling copper wastewater in the production line enters the pickling copper wastewater storage tank, and then enters the low-temperature evaporator assembly 2 for low-temperature evaporation, and the pickling copper wastewater concentrated by low-temperature evaporation enters electrolysis, After the electrolytic extraction of copper is completed, if the copper content does not meet the discharge standard, the copper is collected by resin filtration, and the resin that collects copper ions is backwashed to obtain copper-containing waste liquid, which then enters the next round of low-temperature evaporation and electrolysis. If it meets the standard, it is directly discharged or Purified water is reused after back osmosis through the ultrafilt...

Embodiment 2

[0075] This embodiment is the use of this process on the pickling copper recovery line of Zhejiang Shaoxing Jiutian Umbrella Industry Co., Ltd.

[0076] Its online pickling copper wastewater was originally replaced by sponge copper, which produced low value, hydrochloric acid and nitric acid could not be reused, and the sewage treatment resulted in a large amount of solid waste; 220 tons of pickling waste liquid per month formed 6 tons of solid waste, Outsourcing costs remain high. Introducing the electrolysis process of this technology, 220 tons of copper with a copper ratio of 0.8% are directly refined to recover 1.7 tons of copper per month; the acid is recovered and recycled, and an economic benefit of 150,000 yuan per month is realized.

Embodiment 3

[0078] This embodiment is the use of this process in Xinfeng Xunjiexing Circuit Technology Co., Ltd.

[0079] The copper waste liquid of its online pickling circuit board was directly outsourced, and the added value was not high. The electrolysis process was introduced, and the copper content of 40 tons / day was 10.8%. 4.3 tons / month of copper was directly refined and recycled; acid recovery and recycling Using it, the economic benefit is 300,000 yuan / day, and the annual energy recovery of the project saves more than 100 million yuan.

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Abstract

The invention discloses a method and a device for refining copper heavy metal in acid pickling copper wastewater. The invention aims to solve the technical problems that existing acid pickling copper wastewater treatment technology cannot realize wide-range copper ion concentration treatment, is not suitable for treating acid pickling copper wastewater with extremely low copper ion concentration and the like. According to the method for refining the copper heavy metal in the copper pickling wastewater, low-temperature evaporation pretreatment is conducted firstly, and then electrochemical treatment is conducted. The device for refining the copper in the copper pickling wastewater comprises a low-temperature evaporator and a copper pickling wastewater regeneration system. The method and the device have the advantages of good treatment effect on the pickling copper wastewater with a wide copper ion concentration range including an extremely low concentration, capability of achieving 100% copper removal, recycling of hydrochloric acid, nitric acid and sulfuric acid, etc.; and treatment efficiency is high, and cost is low.

Description

technical field [0001] The invention relates to the technical field of pickling copper wastewater treatment, in particular to a method for refining copper heavy metals from pickling copper wastewater and a device thereof. Background technique [0002] The pickling copper wastewater containing heavy metal copper ions mainly comes from industrial pickling copper wastewater such as mining, non-ferrous metals, pickling, electroplating, electrolysis, and air-conditioning parts processing. Heavy metal ions mainly include copper, lead, zinc, iron and other heavy metal ions. Since heavy metal ions cannot be decomposed by themselves, they are easy to accumulate in organisms, destroying the normal metabolic activities of organisms, and causing great harm to humans and the environment. Effective removal and electrolytic extraction of heavy metal copper ions can reduce the cost of sewage treatment, and reuse nitric acid and hydrochloric acid. The reuse of the dilute sulfuric acid produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/20C02F103/16
CPCC02F1/04C02F1/4672C02F1/46104C02F2101/20C02F2103/16
Inventor 蒲桂香蔡龙飞蒲家义
Owner 迈玺(深圳)智能动力有限公司
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