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Treatment method for electroplating sludge

A technology for electroplating sludge and treatment method, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the general economic benefits, high moisture content requirements, cost waste, etc. problem, to achieve the effect of simple and reasonable process, lower processing cost and lower dehydration cost

Inactive Publication Date: 2018-08-10
重庆康达实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sludge usually needs to be conditioned and dehydrated before incineration, landfill, composting or building material utilization. Practice shows that the moisture content of newly generated electroplating sludge is generally high, reaching 75% to 80%. High moisture brings great difficulties to the treatment of electroplating sludge
The composition and properties of electroplating sludge are very complex, and some hydrophilic organic aggregates contained in it, during the sludge dehydration process, the organic matter is compressible and the sewage outflow channel in the sludge is blocked, resulting in The moisture contained in the sludge floc grid cannot be released to the greatest extent, that is, the deep dehydration of the sludge cannot be achieved, and direct drying will cause a great waste of cost, and the content of heavy metals in some electroplating sludge Very low, very common treatment process has no benefit at all
[0003] Smelting electroplating sludge can completely solve the metal pollution problem of electroplating sludge. However, due to the high moisture content of electroplating sludge, the smelting furnace has high requirements on the moisture content of the incoming materials, and the dehydration energy consumption is high, resulting in general economic benefits.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The treatment method of the electroplating sludge that the present embodiment provides, comprises the steps:

[0043] (1) Add 12kg of composite additives to 200kg of electroplating sludge with a water content of 83.76% produced by an electroplating factory at a mass ratio of 100:6, mix well, and place it under ultraviolet light at a speed of 110r / min Stirring treatment for 1.5h;

[0044] (2) Add coke powder to the mixture obtained in step (1), the addition of coke powder is 20% of the mixture quality, press filter after mixing, collect mud cake, and discharge the filtrate after purification treatment simultaneously; adopt conventional The moisture content of the collected mud cake was measured to be 22.48%;

[0045] (3) After pulverizing the mud cake collected in step (2), dry it to a moisture content of ≤8%, place it at a temperature of 1150°C for smelting treatment, and discharge the waste gas generated by smelting after purification treatment, and smelting After th...

Embodiment 2

[0057] The treatment method of the electroplating sludge that the present embodiment provides, comprises the steps:

[0058] (1) Add 12kg of composite additives to 200kg of electroplating sludge with a water content of 83.76% produced by an electroplating factory at a mass ratio of 100:6, mix well, and place it under ultraviolet light at a speed of 120r / min Stirring treatment for 1h;

[0059] (2) Add coke powder to the mixture obtained in step (1), the addition of coke powder is 20% of the mixture quality, press filter after mixing, collect mud cake, and discharge the filtrate after purification treatment simultaneously; adopt conventional The moisture content of the collected mud cake was measured to be 21.72%;

[0060] (3) After pulverizing the mud cake collected in step (2), dry it to a moisture content of ≤ 8%, put it at a temperature of 1200°C for smelting treatment, and discharge the waste gas generated by smelting after purification treatment, and smelting After the m...

Embodiment 3

[0066] The treatment method of the electroplating sludge that the present embodiment provides, comprises the steps:

[0067] (1) Add 10kg of composite additives to 200kg of electroplating sludge with a water content of 83.76% produced by an electroplating factory at a mass ratio of 100:5, mix well, and place it under ultraviolet light at a speed of 110r / min Stirring treatment for 1.5h;

[0068] (2) Add coke powder to the mixture obtained in step (1), the addition of coke powder is 20% of the mixture quality, press filter after mixing, collect mud cake, and discharge the filtrate after purification treatment simultaneously; adopt conventional The moisture content of the collected mud cake was measured to be 20.86%;

[0069] (3) After pulverizing the mud cake collected in step (2), dry it to a moisture content of ≤8%, place it at a temperature of 1100°C for smelting treatment, and discharge the waste gas generated by smelting after purification treatment, and smelting After th...

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Abstract

The invention provides a treatment method for electroplating sludge. The method comprises the following steps: (1) adding a composite additive into the electroplating sludge in a mass ratio of 100 to(5-7), mixing uniformly, then putting the mixture in an ultraviolet irradiation condition, and stirring and processing for 1-1.5h at a revolving speed of 110-120r / min; (2) adding coke powder into themixture obtained in step (1), maintaining the added amount of the coke powder to be 20% of the mass of the mixture, mixing uniformly, then performing filter pressing treatment, collecting mud cakes, and meanwhile, discharging filtrate subjected to purification treatment; (3) smashing the mud cakes collected in step (2), drying the smashed mud cakes until the moisture content is less than or equalto 8%, keeping the smashed mud cakes in a condition that the temperature is 1,100-1,200 DEG C so as to perform smelting treatment, enabling exhaust gas, which is generated through smelting, to be subjected to purification treatment, then discharging the exhaust gas, and refining and separating materials subjected to smelting to obtain melted slag and metal alloy.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a treatment method for electroplating sludge. Background technique [0002] Electroplating sludge is the "final state" of wastewater treatment in the electroplating industry. It contains a large amount of heavy metals such as copper, chromium, iron, and zinc, which are toxic to heavy metals and are hazardous substances. Sludge usually needs to be conditioned and dehydrated before incineration, landfill, composting or building material utilization. Practice shows that the moisture content of newly generated electroplating sludge is generally high, reaching 75% to 80%. High moisture brings great difficulties to the treatment of electroplating sludge. The composition and properties of electroplating sludge are very complex, and some hydrophilic organic aggregates contained in it, during the sludge dehydration process, the organic matter is compressible and the sewage outflow channel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/10C02F11/12C02F11/14C02F103/16
CPCC02F11/00C02F11/004C02F11/10C02F11/122C02F11/14C02F2103/16C02F2303/04C02F2305/10
Inventor 顾卫平江洪陈杨程钦龙肖瑜
Owner 重庆康达实业有限公司
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