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Catalytic ozonation treatment method for refining sewage

A technology for refining and chemical sewage and ozone oxidation, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve problems such as the reduction of catalytic activity, reduce consumption and meet environmental protection standards. , to achieve the effect of deep processing

Active Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
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AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the catalytic activity of the activated carbon catalyst is reduced after being used for a long time, the present invention provides a catalytic ozonation treatment method for refinery sewage with a recyclable catalyst. The PACT-WAR system is used to regenerate the activated carbon catalyst, and the regeneration rate of activated carbon can reach 80%. The above can maximize the use of activated carbon, improve the effect of sewage treatment, and reduce investment and operating costs at the same time, providing optimal technical solutions for the standard upgrading and transformation projects of refining and chemical enterprises

Method used

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  • Catalytic ozonation treatment method for refining sewage

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Embodiment 1

[0035] According to the technical process provided by the present invention, the oily sewage air flotation water (COD 869.3mg / L) of a certain refinery is processed, and the main processing unit process conditions are as follows: the amount of coal-based powdered activated carbon added to A pool is 60mg / L; A / O tank residence time is 8 / 20h, COD load is 0.8kg COD / m 3 d, the sludge concentration is 5g / L, the sludge internal return ratio is 300%, the sludge external return ratio is 100%, and the aeration intensity of the aerobic tank is 7m 3 / m 2 h, the hydraulic retention time of the secondary sedimentation tank is 1.0h; the sand filter uses quartz sand as the filler, and the filtration rate is 6m / h; the catalytic ozonation tower is filled with coal-based powdered activated carbon loaded with copper oxide and iron oxide, and the hydraulic retention time The ozone dosage is 40mg / L; the ozone concentration is 50mg / L; the residence time of the intermediate pool is 1.0h; the biologic...

Embodiment 2

[0038] According to the technical process provided by the present invention, the saline sewage air flotation effluent (COD 1257.2mg / L) of a certain refinery is processed, and the main processing unit process conditions are as follows: the amount of wood-based powdered activated carbon added to pool A is 80mg / L ; A / O tank residence time is 12 / 24h, COD load is 1.0kg COD / m 3 d, sludge concentration 6g / L, sludge internal reflux ratio 300%, sludge external reflux ratio 100%, aerobic tank aeration intensity 8m 3 / m 2 h, the hydraulic retention time of the secondary sedimentation tank is 1.5h; the sand filter uses wood-based granular activated carbon as filler, and the filtration rate is 5m / h; the catalytic ozonation tower is filled with cerium oxide granular activated carbon, and the hydraulic retention time is 1.0h; The dosage of ozone is 50mg / L; the concentration of ozone is 80mg / L; the residence time of the middle pool is 0.5h; the filler of the biological aerated filter is cera...

Embodiment 3

[0041] According to the technical process provided by the present invention, the oily sewage air flotation water (COD 869.3mg / L) of a certain refinery is processed, and the main processing unit process conditions are as follows: the amount of coconut shell-based powdered activated carbon added to the A pool is 40mg / L ; A / O tank residence time is 6 / 12h, COD load is 0.3kg COD / m 3 d, sludge concentration 2g / L, sludge internal reflux ratio 200%, sludge external reflux ratio 80%, aerobic tank aeration intensity 5m 3 / m 2 h, the hydraulic retention time of the secondary sedimentation tank is 0.5h; the sand filter uses anthracite as filler, and the filtration rate is 5m / h; the catalytic ozonation tower is filled with coconut shell-based granular activated carbon, and the hydraulic retention time is 1.5h; the dosage of ozone The ozone concentration is 20mg / L; the residence time of the middle pool is 1.5h; the biological aerated filter is filled with zeolite, the filtration rate is 2m...

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Abstract

The invention provides a sewage treatment technology method achieved by combining biochemistry with catalytic ozonation. The method is characterized in that according to the technology, activated carbon of a biochemistry unit and a catalytic ozonation unit can be recycled, and the technical problems that in industry sewage treatment, large activated carbon dosage is needed, the operation cost is high, and the effect of a catalytic ozonation catalyst is reduced are solved. According to the technical scheme, the activated carbon catalyst of the catalytic ozonation unit is recycled through an activated carbon recycling WAR unit of a biochemical system, so that the activated carbon catalyst of which the catalytic activity is reduced can be recycled on the condition that no treatment unit is additionally arranged, the regenerated catalyst can be used as a catalyst again, and therefore the dosage of adsorption activated carbon and the catalyst activated carbon of an enterprise is decreased. The method can be applied to the field of refinery enterprise sewage treatment and is particularly suitable for upgrading and reconstruction conducted on a sewage treatment system.

Description

technical field [0001] The invention relates to a method for treating refinery sewage, in particular to a catalytic ozonation treatment method for refinery sewage with a recyclable catalyst. Background technique [0002] With the deterioration of petroleum resources, the quality of sewage produced by refining and chemical enterprises is getting worse and worse. At the same time, environmental protection discharge standards are becoming more stringent, which makes it more difficult for refining and chemical enterprises to treat sewage. The original sewage treatment systems of most refining and chemical enterprises can no longer meet the requirements of environmental protection and need to be upgraded. [0003] The A / O system is an effective means to remove pollutants. In order to improve the treatment effect of the A / O system, a certain amount of powdered activated carbon is added to the anoxic tank, and the organic matter in the sewage is removed by using the good adsorption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 邱小云龚小芝赵辉刘正
Owner CHINA PETROLEUM & CHEM CORP
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