Electroplating effluent recycling device and processing method thereof

A technology for electroplating wastewater and treatment method, which is applied in the fields of metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can achieve the effect of realizing resource reuse, strong versatility and simple structure

Active Publication Date: 2015-06-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Generally, the content of heavy metals in electroplating wastewater is low, and the amount of water treatment is large, resulting in a large amount of chemical dosage, which is easy to cause secondary pollution;
[0005] 2. The process equipment occupies a large area, and the operating cost and fixed investment are relatively large;
[0006] 3. The technological operation process is more complicated and the operation is more difficult;
[0007] 4. Most of the existing processes for the treatment of electroplating wastewater cannot effectively achieve the standard treatment of electroplating wastewater, resulting in serious secondary pollution

Method used

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  • Electroplating effluent recycling device and processing method thereof

Examples

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Effect test

Embodiment 1

[0040] A treatment method for electroplating wastewater recycling equipment, comprising the following steps:

[0041] Step 1: the electroplating wastewater in the wastewater storage tank 1 is pumped into the flocculation tank 2 under the action of the self-priming pump 11;

[0042] Step 2: In the flocculation tank 2, add a flocculant (polyglutamic acid of 2 g / L) through the flocculant dosing machine 21, and stir for 1 to 2 minutes to form a mixture, and send the mixture into the sedimentation tank 3;

[0043] Step 3: The mixture is precipitated in the sedimentation tank 3, the sediment is deposited in the lower part of the sedimentation tank 3, the liquid floats on the upper layer of the sediment, and the upper liquid is pumped into the quartz sand filter 4 for filtration;

[0044] Step 4: The filtered liquid is sent to the reverse osmosis membrane treatment equipment 5, the pure water outside the reverse osmosis membrane is sent to the pure water tank 6 through the pure water...

Embodiment 2

[0048] A treatment method for electroplating wastewater recycling equipment, comprising the following steps:

[0049] Step 1: the electroplating wastewater in the wastewater storage tank 1 is pumped into the flocculation tank 2 under the action of the self-priming pump 11;

[0050] Step 2: In the flocculation tank 2, add a flocculant (6g / L polyacrylamide) through the flocculant dosing machine 21, and stir for 1 to 2 minutes to form a mixture, and send the mixture into the sedimentation tank 3;

[0051] Step 3: The mixture is precipitated in the sedimentation tank 3, the sediment is deposited in the lower part of the sedimentation tank 3, the liquid floats on the upper layer of the sediment, and the upper liquid is pumped into the quartz sand filter 4 for filtration;

[0052] Step 4: The filtered liquid is sent to the reverse osmosis membrane treatment equipment 5, the pure water outside the reverse osmosis membrane is sent to the pure water tank 6 through the pure water pipe 5...

Embodiment 3

[0056] A treatment method for electroplating wastewater recycling equipment, comprising the following steps:

[0057] Step 1: the electroplating wastewater in the wastewater storage tank 1 is pumped into the flocculation tank 2 under the action of the self-priming pump 11;

[0058] Step 2: In the flocculation tank 2, add a flocculant (6g / L dehydrated polyferric sulfate) through the flocculant dosing machine 21, and stir for 1 to 2 minutes to form a mixture, and send the mixture into the sedimentation tank 3;

[0059] Step 3: The mixture is precipitated in the sedimentation tank 3, the sediment is deposited in the lower part of the sedimentation tank 3, the liquid floats on the upper layer of the sediment, and the upper liquid is pumped into the quartz sand filter 4 for filtration;

[0060] Step 4: The filtered liquid is sent to the reverse osmosis membrane treatment equipment 5, the pure water outside the reverse osmosis membrane is sent to the pure water tank 6 through the pure...

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Abstract

The invention discloses an electroplating effluent recycling device. The electroplating effluent recycling device comprises an effluent storage pond connected with a flocculation pond through a self-priming pump and a pipeline, the flocculation pond is connected with a settling pond through a pipeline, the settling pond is connected with a silica sand filter through a raw water lift pump and a pipeline, the silica sand filter is connected with a reverse osmosis membrane processing device through a pipeline, and the reverse osmosis membrane processing device is connected with a purified water tank through a purified water pipe and further connected with a concentrated water tank through a concentrated water pipe. A flocculant adding machine is arranged on the flocculation pond, and a sediment conveying pipe is arranged at the lower portion of the settling pond. The electroplating effluent recycling device is simple in structure, convenient to connect and low in input cost. According to an electroplating effluent recycling method, the electroplating effluent is flocculated through the flocculation pond, deposited through the settling pond and filtered through the silica sand filter to be processed through the reverse osmosis membrane processing device, purified water and concentrated water are obtained, the concentrated water is recycled, the purified water is collected and recycled, the recycling rate of the electroplating effluent can reach 60 percent, and resource reutilization is achieved.

Description

technical field [0001] The invention relates to the technical field of electroplating wastewater treatment, in particular to electroplating wastewater recycling equipment and a treatment method thereof. Background technique [0002] The electroplating industry is an important processing industry in my country. At present, it is mainly galvanized, copper-plated, chrome-plated and nickel-plated. It is mainly distributed in machine manufacturing, light industry, electronics, aviation and instrumentation manufacturing; The annual discharge amount of the carbon dioxide is more than 400 million tons, which has caused serious environmental pollution. In addition, the high pollution of electroplating wastewater not only causes serious damage to the environment, but also has a great impact on the health of the surrounding people and hidden dangers of disease. [0003] Electroplating wastewater treatment technology is also varied, generally speaking, it can be divided into four catego...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/16
Inventor 董滨张科锋靳慧霞沈丹妮孟金凤
Owner TONGJI UNIV
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