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Technology for treating electroplating waste water

A technology for electroplating wastewater and treatment process, which is applied in metallurgical wastewater treatment, neutralization water/sewage treatment, and reduced water/sewage treatment, etc. High wastewater purification efficiency, small footprint, and the effect of improving purification efficiency

Inactive Publication Date: 2014-01-15
苏州腾辉环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the chemical precipitation method is usually used to purify electroplating wastewater, even if the heavy metal ions in the dissolved state in the water are transformed into insoluble heavy metal compounds, and then removed by precipitation. This method has simple process and low input cost, but the purification effect Not high, heavy metals in wastewater are easy to waste, and the economic benefits are not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (a) Influent water: import electroplating wastewater, water quality COD=2400mg / L, BOD=1980mg / L, SS=1320mg / L;

[0019] (b) Mixing: The electroplating wastewater is introduced into a comprehensive wastewater pool with a reinforced concrete structure for mixing. The inner wall of the wastewater pool is equipped with glass fiber reinforced plastics, and the effective volume in the pool is 15m 3 The time is 8 hours, add 2g / L sulfuric acid into the pool;

[0020] (c) Redox: the mixed electroplating wastewater is introduced into the reduction reaction pool made of carbon steel, with an effective volume of 9 m 3 , the residence time is 1h, inject sodium sulfite 2g / L into the reaction tank, to reduce the heavy metal in the waste water;

[0021] (d) Regulating pool: the waste water after the reduction reaction is introduced into the carbon steel regulating pool for pH adjustment. The inner wall of the regulating pool is equipped with glass fiber reinforced plastics, and the effe...

Embodiment 2

[0026] (a) Influent water: import electroplating wastewater, water quality COD=2510mg / L, BOD=1380mg / L, SS=1740mg / L;

[0027] (b) Mixing: The electroplating wastewater is introduced into a comprehensive wastewater pool with a reinforced concrete structure for mixing. The inner wall of the wastewater pool is equipped with glass fiber reinforced plastics, and the effective volume in the pool is 19m 3 The time is 9h, add 3.2g / L sulfuric acid into the pool;

[0028] (c) Redox: the mixed electroplating wastewater is introduced into the reduction reaction pool made of carbon steel, with an effective volume of 9.5 m 3 , the residence time is 1.8h, and 3.2g / L of sodium sulfite is injected into the reaction tank to reduce the heavy metals in the wastewater;

[0029] (d) Regulating pool: the waste water after the reduction reaction is introduced into the carbon steel regulating pool for pH adjustment. The inner wall of the regulating pool is equipped with glass fiber reinforced plastics...

Embodiment 3

[0034] (a) Influent water: import electroplating wastewater, water quality COD=2450mg / L, BOD=1350mg / L, SS=1480mg / L;

[0035] (b) Mixing: The electroplating wastewater is introduced into a comprehensive wastewater pool with a reinforced concrete structure for mixing. The inner wall of the wastewater pool is equipped with glass fiber reinforced plastics, and the effective volume in the pool is 25 m 3 The time is 10h, add 5g / L sulfuric acid into the pool;

[0036] (c) Redox: the mixed electroplating wastewater is introduced into a reduction reaction pool made of carbon steel, with an effective volume of 10 m 3 , the residence time is 2h, inject sodium sulfite 4g / L into the reaction tank, to reduce the heavy metal in the waste water;

[0037] (d) Regulating pool: the waste water after the reduction reaction is introduced into the carbon steel regulating pool for pH adjustment. The inner wall of the regulating pool is equipped with glass steel, and the effective volume is 8 m 3 ,...

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Abstract

The invention discloses a technology for treating electroplating waste water, comprising water inlet, collection, reduction reaction, pH value regulation, deposition, clear water pool and water outlet. A reduction reaction technology is added in the invention for pretreatment, is in favor of stable and effective operation of a subsequent purification technology, and raises purification efficiency of electroplating waste water. Because the technology has advantages of simple technology, small land occupation area and high purification efficiency of waste water, the technology is suitable for popularization and usage.

Description

technical field [0001] The invention relates to a wastewater purification process, in particular to a treatment process for electroplating wastewater. Background technique [0002] The electroplating industry is an indispensable link in my country's national economy, involving various fields such as national defense, industry, and life. The phenomenon of large demand has also caused the excessive development of the electroplating industry. A large number of electroplating factories have been built, and the discharged wastewater contains chromium, nickel, Heavy metals such as cadmium are harmful to the soil, water environment and the growth of animals and plants. Therefore, the purification of electroplating wastewater is imminent. At present, the chemical precipitation method is usually used to purify electroplating wastewater, even if the heavy metal ions in the dissolved state in the water are transformed into insoluble heavy metal compounds, and then removed by precipitati...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/70C02F1/52C02F1/50C02F103/16
Inventor 徐浩
Owner 苏州腾辉环保科技有限公司
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