Regeneration process technology for sewage in refinery

Abstract

The present invention relates to a sewage regeneration treatment process for oil-refining industry and petro-chemical industry. Said treatment process system includes suspension filler biological contact oxidation depth treatment, flocculating setting quartz sand filtration, ozone partial oxidation, biological active carbon and disinfection treatment units. Its application range is extensive, operation stability is good, impact resistance is strong and pollutant-removing efficiency is high. It not only can completely remove SS of outward-discharged water, its turbidity, can effectively reduceCODcr, NH3-N, BOD5, oil, sulfide and phenol, etc., but also has the obvious effect for removing macromolecular organic matter, and can completely remove colour for water, and its energy consumption is low, its regenerated water is good in quality.

Description

technical field [0001] The invention is suitable for the advanced treatment and regeneration of sewage in industries such as refinery, petrochemical and light industry, and is specifically a regeneration treatment process for refinery sewage. Background technique [0002] In recent years, the phenomenon of water shortage in our country has become increasingly serious, which has threatened the normal production and life of enterprises. Sewage reuse is the only way for enterprises to solve water shortage, improve the utilization rate of water resources, reduce production costs, reduce environmental pollution, and promote sustainable development of enterprises. There are many types and high concentrations of pollutants in the sewage of refining and chemical enterprises, mainly including oil and COD cr , NH 3 -N, BOD 5 , sulfide, phenol, SS, cyanide, and trace macromolecular organic matter, etc. At present, the treatment of sewage generally adopts the process of "oil separati...

AI Technical Summary

Problems solved by technology

Since the sewage regeneration process is only effective for the removal of SS and turbidity, the dissolved pollutants, especially the reducing substances, cannot be effectively removed. After a period of sewage reuse, microorganisms still grow in large numbers, and the water quality of the circulating cooling water system declines. soon

[0006] Some researchers have developed a membrane filtration system for advanced treatment of refinery sewage, which can be reused in various ways of water demand. Although it has a good removal effect on suspended solids, turbidity, some COD, bacteria, etc., BOD 5 , NH 3 -N, sulfide, TOC and other reducing pollutants cannot be removed, and the operation cost is high, and there are still problems such as a large number of microorganisms growing during reuse

[0007] It can be seen that there are many pollutants in the sewage discharged by refining and chemical enterprises, and there are many deficiencies in sewage regeneration. At present, the scope of sewage reuse is still very narrow, and it is difficult to achieve long-term reuse. Effective sewage regeneration processes must be developed

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