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A device for treating high-concentration electroplating wastewater and its application

A high-concentration technology for electroplating wastewater, applied in metallurgical wastewater treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as difficult to achieve ideal results, achieve significant removal effect, reduce labor intensity, The effect of saving engineering investment

Inactive Publication Date: 2011-11-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For high-concentration electroplating wastewater treatment, it is difficult to achieve the ideal effect by adopting the first-level treatment process. Only the integrated technology application that combines the characteristics of various treatment technologies can achieve the ideal effect.

Method used

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  • A device for treating high-concentration electroplating wastewater and its application

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Experimental program
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Effect test

Embodiment 1

[0046] Equipment treatment water volume 60m 3 / h, press figure 1 Process shown. Calcium hydroxide is added to the water inlet of the coagulation inclined plate sedimentation tank to adjust the pH value to 7.0-7.5, and sodium hydroxide is added to the middle part to fine-tune the pH value to 8.5-9.0. Add polyacrylamide 2mg / L to the coagulation inclined plate sedimentation tank, and control the pH value of the clear water tank between 6.0 and 9.0. The coagulation inclined plate sedimentation tank automatically discharges mud once every 4 hours. The multimedia filter tank is backwashed once every 12 hours. The working pressure of thick slurry pump is controlled at 2kgf / cm 2 .

[0047] The equipment runs continuously and stably, and the processing results are shown in Table 2.

[0048] Table 2 Equipment treatment effluent water quality

[0049]

[0050] The removal rate of each index is shown in Table 3.

[0051] Table 3 Removal rate of various pollutants

[005...

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Abstract

The invention relates to a device for treating high-concentration electroplating wastewater and its application, including an electroplating wastewater regulating tank, a microporous aeration neutralization reaction tank, an intermediate pool, a coagulation inclined plate sedimentation tank, a sludge concentration tank, and a multi-media filter tank , clean water pool, calcium hydroxide dispensing tank, sodium hydroxide dispensing tank, polyacrylamide dispensing tank, hydrochloric acid storage tank, chamber filter press, water pump, dosing pump, blower, thick slurry pump; Pore ​​aeration neutralization reaction + coagulation inclined plate sedimentation + multi-media filtration combined process to treat high-concentration electroplating wastewater. The invention treats high-concentration electroplating pickling comprehensive wastewater, and the removal effect is remarkable. The removal rate of nickel is over 99%, and the removal rate of nickel is over 90%. The invention is suitable for the treatment of high-concentration electroplating wastewater and pickling wastewater.

Description

technical field [0001] The invention relates to a treatment method for high-concentration electroplating wastewater, in particular to a method and a special device for treating high-concentration electroplating wastewater through a combined process of microporous aeration neutralization reaction + coagulation inclined plate sedimentation + multi-media filtration. Background technique [0002] Electroplating is the "beautician" of metal surface treatment. It can obtain functional, decorative and protective metal film layers on various substrates. Its products are used in various industries. Therefore, electroplating plays a decisive role in the construction of the national economy. It is an indispensable and important part of the production process of most industries, and it cannot be replaced by other processes. However, electroplating has attracted attention for seriously polluting the environment. Electroplating enterprises are not only big polluters, but also big water u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/66C02F1/74C02F11/12C02F103/16
Inventor 于永辉孙承林杨旭乔瑞平臧广安于波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI