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Coke wastewater sludge innocent treatment method

A harmless treatment and sludge technology, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problems of lack of research and application and regeneration, and achieve lower treatment costs, reduce pollution, avoid The effect of secondary pollution

Inactive Publication Date: 2017-05-31
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li Zhongjin et al. (Fine Chemical Industry, 2010, 27(7): 692-695) used epichlorohydrin as a crosslinking agent in "Synthesis and Characterization of β-cyclodextrin Polymer Microspheres" and synthesized by inverse emulsion method β-cyclodextrin polymer microspheres with a particle size of 10 μm have not been studied for its application and regeneration

Method used

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  • Coke wastewater sludge innocent treatment method
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 1000ml of non-dehydrated coking sludge containing 50000mg / L of organic pollutants and 1% of heavy metal ions in a beaker, weigh 20g of modified cyclodextrin and place it in the filter screen, and place the filter screen in the coking sludge In the mud, use a magnetic stirrer to stir for 2 hours, take out the sludge for centrifugation, take the supernatant, measure its concentration as 500mg / L, and analyze the heavy metal ion of the lower layer of sludge as 100mg / L, modified cyclodextrin Regeneration, after coking sludge is centrifuged, the wastewater is sent to the wastewater treatment plant, and the sludge is air-dried and used as backfill.

Embodiment 2

[0027] Take 1000ml of undehydrated coking sludge containing 25000mg / L of organic pollutants and 0.5% of heavy metal ions in a beaker, then weigh 15g of modified cyclodextrin and place it on the filter screen, and place the filter screen on the coking sludge. In the mud, use a magnetic stirrer to stir for 2 hours, take out the sludge for centrifugation, take the supernatant, measure its concentration as 100mg / L, and analyze the heavy metal ion of the lower layer of sludge as 40mg / L, modified cyclodextrin Regeneration, after coking sludge is centrifuged, the wastewater is sent to the wastewater treatment plant, and the sludge is air-dried and used as backfill.

Embodiment 3

[0029] Take 1000ml of undehydrated coking sludge containing 1000mg / L of organic pollutants and 100mg / L of heavy metal ions and put it in a beaker, then weigh 15g of modified cyclodextrin and put it on the filter screen, and place the filter screen on the coking In the sludge, use a magnetic stirrer to stir for 2 hours, take out the sludge for centrifugation, take the supernatant, measure its concentration as 20mg / L, and analyze the heavy metal ion of the lower layer of sludge as 10mg / L, modified cyclopaste Fine regeneration, coking sludge is centrifuged, the waste water is sent to the wastewater treatment plant, and the sludge is air-dried and used as backfill.

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Abstract

The invention discloses a coke wastewater sludge innocent treatment method. The method specifically comprises the steps that coke wastewater sludge is placed in a container, a functional material modified cyclodextrin is wrapped in a filter screen and placed into the coke wastewater sludge, the functional material modified cyclodextrin makes contact with the coke wastewater sludge by stirring the coke wastewater sludge, and the purpose of innocent treatment is achieved. According to the method, the coke wastewater sludge is treated through the modified cyclodextrin for the first time, as for the coke wastewater sludge treated through the modified cyclodextrin, the concentration of organic pollutants such as benzene and phenol organic pollutants is reduced from 50000 mg / L to 20 mg / L; the content of heavy metal ions (Cr ions, Ni ions and the like) is reduced from 10000 mg / L to 10 mg / L; the foul smell of the coke wastewater sludge is effectively eliminated; the modified cyclodextrin can conduct regeneration treatment, and thus, the treatment cost of the coke wastewater sludge per ton is reduced from 5000-20000 CNY to below 5000 CNY; the coke wastewater sludge subjected to innocent treatment can be subjected to resource reuse; and pollution of the coke wastewater sludge to the environment is reduced, and secondary pollution in the treatment process is avoided.

Description

technical field [0001] The invention belongs to the field of environmental chemical industry, in particular to a harmless treatment method of coking sludge. Background technique [0002] Coking wastewater treatment is a difficult problem in the coking industry. The composition of coking wastewater is complex, and there are more than 100 harmful substances that can be detected. The treated coking wastewater is discharged, and the remaining sludge has no treatment measures. After analysis, it is found that the coking sludge contains pollutants such as benzene, phenols, and polycyclic aromatic hydrocarbons, as well as a variety of heavy metal ions and metal oxides. It undergoes harmless treatment to reduce or remove its pollutants. At present, coking sludge is often sent to coal yards for combustion or coking without any harmless treatment. In this way, the pollutants continue to remain in the sludge, causing secondary pollution and causing great pollution to the environment....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/10
Inventor 周玉青李强都宏霞许宁
Owner NANJING POLYTECHNIC INSITUTE