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Recycling method for high-chlorine heavy metal sludge

A heavy metal sludge and recycling technology, applied in the granulation method of raw materials, chemical instruments and methods, sludge treatment and other directions, can solve the problems of easy oxidation failure, frequent regeneration, large processing capacity of ion exchangers, etc. The effect of realizing resource utilization and improving recycling efficiency

Inactive Publication Date: 2018-04-24
JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

Ion exchange method is an important treatment method for electroplating wastewater. It has large treatment capacity, good effluent quality, can recycle heavy metal resources, and has no secondary pollution to the environment. has a significant impact on the removal efficiency of

Method used

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  • Recycling method for high-chlorine heavy metal sludge

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Embodiment Construction

[0020] Such as figure 1 As shown, the invention discloses a resource treatment method for high-chlorinated heavy metal sludge

[0021] The method is characterized in that: comprising the steps of:

[0022] 1) Salt washing: The sludge pump 2 transports the high-chlorinated heavy metal sludge in the sludge concentration tank 1 to the vacuum belt dehydrator 3, and the cleaning water sprayed by the spray system on the top of the vacuum belt dehydrator The chlorinated heavy metal sludge is washed to obtain brine, and the amount of washing water is 3 to 7 times that of the high-chlorinated heavy metal sludge. At the same time, the water in the high-chlorinated heavy metal sludge is removed through the vacuum belt dehydrator 3 to obtain a moisture content of 30-50. % dewatered sludge;

[0023] Among them, the high chloride heavy metal sludge in the sludge thickening tank 1 has a water content of 85-90% and a chloride salt content of 15-25%.

[0024] 2) Drying: the dewatered sludge...

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Abstract

The invention provides a recycling method for high-chlorine heavy metal sludge and relates to the field of recycling treatment of the sludge. The method comprises steps as follows: 1), salt washing: the high-chlorine heavy metal sludge is cleaned by washing water, salt water is obtained, meanwhile, water in the high-chlorine heavy metal sludge is removed, and dewatered sludge is obtained; 2), drying: the dewatered sludge is dried, dried sludge is obtained, and fly ash in the dried sludge is removed by a dust remover; 3), granulation: the dried sludge without fly ash is uniformly mixed with quartz sand, a mixture is sent to a granulator, and a sludge particle material is prepared; 4), plasma vitrification: the sludge particle material is conveyed to a plasma reacting furnace and processed,and a glass body is formed. According to the method, the problem of sludge pollution caused by a chemical precipitation method is solved, vitrification of heavy metal is realized, the heavy metal sludge can be used for preparing building materials or taken as the raw material of production industries such as glass, ceramics and the like, and recycling application of the heavy metal sludge is realized.

Description

technical field [0001] The invention relates to the field of sludge resource treatment, in particular to a method for resource treatment of high-chlorinated heavy metal sludge. Background technique [0002] With the continuous development of my country's industry and the continuous increase of industrial enterprises, a large amount of industrial solid waste is discharged, and industrial sludge treatment has always been a major problem. The composition of industrial sludge is complex, containing toxic organic matter, heavy metals and pathogenic microorganisms. In particular, the heavy metal sludge produced in some industrial wastewater has a high chloride content, which has a greater impact on the leaching of heavy metals after immobilization, and seriously affects the separation and recycling of heavy metal sludge. [0003] At present, the separation and recovery of heavy metal ions in industrial wastewater mainly use chemical precipitation, solvent extraction, ion exchange...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/00B01J2/00C03B5/02C03C6/00C03C1/02
CPCC02F11/12B01J2/00C02F11/00C03B5/025C03C1/002C03C1/02
Inventor 江中央田君国李要建李军陈竹严圣军
Owner JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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