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Method and device for performing recovery and resource utilization on heavy metal in waste acid

A heavy metal and recycling technology, applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of high recycling cost, cumbersome process, secondary pollution, etc., to reduce the output of waste residue, avoid secondary pollution, and improve the recovery rate high effect

Active Publication Date: 2016-03-16
GO HIGHER ENVIRONMENT GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a method and device for recovering heavy metals in waste acid and utilizing them as resources, which solves the problems of secondary pollution caused by waste slag produced by existing technology, cumbersome process, low recovery rate and high recovery cost, etc.

Method used

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  • Method and device for performing recovery and resource utilization on heavy metal in waste acid
  • Method and device for performing recovery and resource utilization on heavy metal in waste acid

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Embodiment 1

[0075] Example 1 is a copper smelting waste acid, wherein the acid mass fraction (in sulfuric acid) is 7.2%, the fluoride ion concentration is 153mg / L, the chloride ion concentration is 1080mg / L, the copper ion concentration is 510mg / L, and the lead ion concentration The suspended solids and colloids in the waste acid are removed through the pre-filtration device and the first-stage membrane system. The mass fraction of acid in the permeate of the second-stage membrane system is 0.8%, the concentration of chloride ion is 1030mg / L, and the concentration of fluoride is 1030mg / L. The ion concentration is 140mg / L, the mass fraction of acid in the concentrate is 13.8%, the concentration of copper ions is 503mg / L, and the concentration of lead ions is 58.87mg / L. After the concentrate is electrolyzed by the electrolysis device, the mass fraction of acid in the electrolyte is about 14% %, the recovery rate of copper is 97.9%, and the recovery rate of lead is 95%.

Embodiment 2

[0076] Embodiment 2 is the waste acid of certain electroplating factory, and wherein acid mass fraction (in sulfuric acid) is 6.2%, and zinc ion concentration is 33.2mg / L, and copper ion concentration is 118mg / L, and lead ion concentration is 12.5mg / L, The nickel ion concentration is 20mg / L. The suspended solids and colloids in the waste acid are removed through the pre-filtration device and the primary membrane system. The mass fraction of acid in the permeate of the secondary membrane system is 0.68%, and the mass fraction of acid in the concentrate The concentration of zinc ions is 11.9%, the concentration of zinc ions is 32.8mg / L, the concentration of copper ions is 116.3mg / L, the concentration of lead ions is 11.6mg / L, and the concentration of nickel ions is 19.3mg / L. The acid mass fraction is about 12%, the recovery rate of zinc is 96.6%, the recovery rate of copper is 975%, the recovery rate of lead is 96%, and the recovery rate of nickel is 98.6%.

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Abstract

The invention provides a method and a device for performing recovery and resource utilization on heavy metal in waste acid and solves the problems of high waste residue output, high operating expense, low recovery rate and the like. The device for performing recovery and resource utilization on the heavy metal in the waste acid comprises a buffer tank, a pre-filtering device connected with the buffer tank, a first-level membrane system connected with the pre-filtering device, a middle water tank connected with the first-level membrane system, a second-level membrane system connected with the middle water tank, a permeate liquid tank connected with the second-level membrane system, a concentrated liquid tank connected with the second-level membrane system and an electrolysis unit connected with the concentrated liquid tank. The method and the device have the benefits as follows: the reduction treatment of the waste acid is realized, the waste residue output is low, the heavy metal recovery rate is high, and the treatment expanse is low.

Description

technical field [0001] The invention belongs to the field of hazardous waste treatment, in particular to a method and a device for recycling heavy metals in waste acid and utilizing them as resources. Background technique [0002] With the development of industry and economy, my country produces more than 100 million tons of waste acid every year, and according to the survey and statistics of China Chemical Industry Information Center, inorganic waste acid accounts for about 35%, organic waste acid accounts for about 65%, and the content is 40%. The above waste acid accounts for about 46% of the total. Industrial waste acid mainly comes from petroleum refining, sulfuric acid and other chemical raw material production, steel processing and washing, bronze production pickling, electronic component manufacturing and other fields. Because waste acid generally contains organic matter and heavy metal ions, direct use will cause secondary pollution, and untreated waste acid enterin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C25C1/00
CPCC22B7/006C25C1/00Y02P10/20
Inventor 陈福泰付强褚永前
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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