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Electroplating comprehensive wastewater treatment process

A comprehensive electroplating and wastewater treatment technology, which is applied in metallurgical wastewater treatment, special compound water treatment, water/sewage treatment, etc., can solve problems that have not been completely solved, activated carbon life decay, and high pH requirements, and achieve delayed supersaturation time, Extend service life and improve desired effect

Inactive Publication Date: 2015-04-15
SHENZHEN LVQIN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) When activated carbon is in use, with the passage of time, the life of activated carbon gradually decays, and only realizes the interphase transfer of pollutants, which does not completely solve the problem;
[0004] (2) In the Fenton technology, the homogeneous catalyst has high requirements on the pH of the reaction, and may cause secondary pollution;

Method used

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  • Electroplating comprehensive wastewater treatment process
  • Electroplating comprehensive wastewater treatment process
  • Electroplating comprehensive wastewater treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment uses a laboratory to simulate the electroplating comprehensive wastewater of copper oily parts, and the electroplating comprehensive wastewater contains a large amount of organic solvents such as kerosene, gasoline, acetone, and toluene.

[0034] The required raw materials include a specific surface area of ​​1500~2000m 2 / g of flake activated carbon, ferrous sulfate (FeSO 4 ·7H 2 O), 30% hydrogen peroxide (30% H 2 O 2 ), 4% sulfuric acid (4% H 2 SO 4 );

[0035] The required equipment includes 5B-3B multi-parameter water quality analyzer, AA320N atomic absorption analyzer, catalytic oxidation reactor and copper chelating resin column.

[0036] Step 1. Electroplating comprehensive wastewater pretreatment. First, take the electroplating comprehensive wastewater for precipitation and sand filtration, and conduct an index test on the electroplating comprehensive wastewater. The test items include chemical oxygen demand (COD), total phosphorus, ammonia nitrogen, an...

Embodiment 2

[0052] In this embodiment, the raffinate from Ganzhou 801 Plant is used as the electroplating comprehensive wastewater to be treated.

[0053] The required raw materials include a specific surface area of ​​1500~2000m 2 / g of flake activated carbon, ferrous sulfate (FeSO 4 ·7H 2 O), 30% hydrogen peroxide (30% H 2 O 2 ), 4% sulfuric acid (4% H 2 SO 4 ), flocculant;

[0054] The required equipment includes 5B-3B multi-parameter water quality analyzer, AA320N atomic absorption analyzer, catalytic oxidation reactor and de-nickel chelating resin column.

[0055] Step 1. Electroplating comprehensive wastewater pretreatment. First, take the raffinate from the Ganzhou 801 plant for precipitation and sand filtration, and conduct index tests on the electroplating integrated wastewater. The test items include chemical oxygen demand (COD), total phosphorus, ammonia nitrogen, and heavy metal ions. Among them, chemical oxygen demand (COD), total phosphorus and ammonia nitrogen are detected by 5B-...

Embodiment 3

[0071] In this embodiment, the wastewater from the Gang'an electroplating plant is used as the comprehensive electroplating wastewater to be treated.

[0072] The required raw materials include a specific surface area of ​​1500~2000m 2 / g of flake activated carbon, ferrous sulfate (FeSO 4 ·7H 2 O), 30% hydrogen peroxide (30% H 2 O 2 ), 4% sulfuric acid (4% H 2 SO 4 ), quicklime, flocculant;

[0073] The required equipment includes 5B-3B multi-parameter water quality analyzer, AA320N atomic absorption analyzer, catalytic oxidation reactor, pH meter, hexavalent chromium removal, acid removal, copper removal, nickel removal, phosphorus removal and ammonia nitrogen chelating resin column.

[0074] Step 1. Electroplating comprehensive wastewater pretreatment. Take the wastewater from the Gang'an electroplating plant as the comprehensive electroplating wastewater to be treated, and carry out precipitation and sand filtration to test the indicators of the electroplating comprehensive waste...

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Abstract

The invention discloses an electroplating comprehensive wastewater treatment process, and relates to the technical field of electroplating wastewater treatment. The electroplating comprehensive wastewater treatment process comprises the following steps: step 1, pretreatment of electroplating comprehensive wastewater, comprising (1) precipitating and sand filtering; (2) wastewater composition detection; step 2, classified catalytic oxidation of the electroplating comprehensive wastewater, comprising (1) for the electroplating comprehensive wastewater with a chemical oxygen demand less than 950 mg / L, adopting one-stage heterogeneous Fenton-like reaction as catalytic oxidation; (2) for the electroplating comprehensive wastewater with a chemical oxygen demand more than or equal to 950 mg / L, adopting two-stage heterogeneous Fenton-like reaction as catalytic oxidation; step 3, ion exchange of the electroplating comprehensive wastewater: adopting chelate resin to adsorb corresponding heavy metal ions. The electroplating comprehensive wastewater treatment process disclosed by the invention improves the requirement of the Fenton technology on pH value, enhances the catalytic oxidation effect, prolongs the service life of activated carbon, prolongs the resin supersaturation time, ensures that the effluent meets the standard, reduces the cost, is convenient to operate, and facilitates implementation of large-scale automatic wastewater treatment.

Description

Technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to the technical field of electroplating wastewater treatment. Background technique [0002] The development of industrial society has promoted the continuous expansion of the scale of the electroplating industry, and more and more wastewater and sewage are generated in industrial electroplating. Among them, electroplating wastewater and sewage contain chromium, copper, nickel, cadmium, zinc, gold, silver, etc. The long-term retention of heavy metal ions and cyanide will cause pollution to the human environment and threaten the health of organisms. Therefore, it is urgent to invest a lot of manpower and material resources to treat industrial electroplating wastewater. In general electroplating wastewater treatment, most of the activated carbon is used to remove harmful substances in the wastewater due to its looseness, porousness and strong adsorption capacity; for high chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/003C02F1/285C02F1/42C02F1/52C02F1/722C02F9/00C02F2001/007C02F2101/20C02F2103/16C02F2305/026
Inventor 郭聪
Owner SHENZHEN LVQIN ENVIRONMENTAL PROTECTION TECH CO LTD
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