Method for innocent treatment of bottom oil sludge, scruff and active sludge in petro-chemical industry

A harmless treatment and biochemical treatment technology, applied in the field of environmental engineering, can solve problems such as lack of resource recovery, and achieve the effect of reducing pollution and saving resources

Active Publication Date: 2009-07-29
湖北汇丰方圆环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that there is still a lack of effective resource recovery of useful substances in the three muds, separation or drying of residual water in the three muds, and harmless disposal of pollutants in the three muds. Methods

Method used

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  • Method for innocent treatment of bottom oil sludge, scruff and active sludge in petro-chemical industry
  • Method for innocent treatment of bottom oil sludge, scruff and active sludge in petro-chemical industry
  • Method for innocent treatment of bottom oil sludge, scruff and active sludge in petro-chemical industry

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Embodiment 1

[0045] (1) Pretreatment of bottom sludge and scum: The bottom sludge in the bottom sludge regulating tank (Φ4000×8000 bottom sludge regulating tank produced by Xi'an Xiangde Environmental Protection Technology Co., Ltd.) is continuously and quantitatively raised to scum In the regulating tank (Φ4000×8000 type scum regulating tank produced by Xi'an Xiangde Environmental Protection Technology Co., Ltd.), the scum is mixed and adjusted together; Polydimethylaminomethacrylamide is added to the pipe to carry out flocculation conditioning on the negatively charged solid particles due to the adsorption of petroleum substances on the surface; the sludge after flocculation conditioning is preliminarily degreased and conditioned by a centrifuge. Dehydration treatment reduces the liquid content of the sludge (including water and petroleum substances) from 95% to 98% to about 80%; the discharged oil-water mixture enters the oil recovery facility in the sewage field for dehydration and reco...

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Abstract

The invention discloses a method for harmlessly treating bottom oil sludge, floating slag and activated sludge in petrochemical industry, which comprises the following steps: performing emulsion breaking on the bottom oil sludge and the floating slag in a special oil-sludge separation device; separating oil, water and sludge of the products after the emulsion breaking in the oil-sludge separation device; and reclaiming dirty oil on the upper part, performing sedimentation on sludge-water mixture on the lower part, reclaiming a supernatant liquid, and sequentially performing treatments of coagulation conditioning, sedimentation separation, mechanical dehydration, sludge drying and sludge incineration on the sludge-water mixture on the bottom and the remaining activated sludge. The method can effectively recycle useful petroleum substances and aluminiferous compounds, effectively purify the gas generated in the processes of the storage and the treatment of the three types of sludge, and sequentially perform the treatments of sludge conditioning, dehydration, drying, and the like and then perform incineration treatment on the residual hazardous wastes after the recycling treatment. The method has the advantages of simple running, safety and reliability, complete resources recovery and controllable moisture elimination, and reduces the pollution to the environment to the utmost extent.

Description

technical field [0001] The present invention relates to a method for harmless treatment of industrial hazardous waste, in particular to a method for harmless treatment of three hazardous wastes in the petrochemical industry (i.e. "three muds": bottom sludge, scum and biochemical treatment unit produced The method of residual activated sludge) belongs to the field of environmental engineering. Background technique [0002] The so-called "three muds" refer to the oil sludge at the bottom of the pool or tank (hereinafter referred to as "bottom oil sludge") produced by the adjustment of the sewage treatment system in the petrochemical industry and the oil separation unit (hereinafter referred to as "bottom oil sludge"), as well as the scum and biochemical treatment produced by the flotation unit. The remaining activated sludge produced by the unit. Since the "three muds" in the petrochemical industry have been listed as hazardous waste by the state, they should be treated in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C02F11/14F23G7/00C02F101/32C02F103/10
Inventor 罗德春
Owner 湖北汇丰方圆环保科技有限公司
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