Oil refining and chemical sewage processing and recovering equipment and method thereof

Abstract

The invention provides oil refining and chemical sewage processing and recovering equipment and a method thereof. The equipment comprises a mixing reaction tank, an anti-blocking air-floatation pool, a multistage matched biological filter tank, a clean water tank, a precision filter, an ejector, an ozone generator, a mixer, an intermediate pool, a biology activated carbon filter and a clean water reservoir which are connected in order by a mechanical mode. If desalination is not required, the reuse water can be fed into an industrial pipe network for use, if desalination is required, a hollow ultrafilter membrane or a micro filter membrane and a reverse osmosis membrane, a desalinized water pool and the reverse osmosis membrane or the nanofiltration membrane and a machinery steam compression system are added. The multistage matched biological filter tank has effects of biodegradation of organic matter and filtering, purifying degree of polluted water can be increased, the hollow ultrafilter membrane or the micro filter membrane and the reverse osmosis membrane are employed for desalination treatment on the polluted water, the reuse water is better adapted to industrial application, and condensation and crystallization treatment can be carried out on the polluted water by the reverse osmosis membrane or the nanofiltration membrane and the machinery steam compression system, so that waste water is not discharged to outside.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment and recovery equipment and method for oil refinery and chemical sewage. Background technique [0002] At present, nearly 50 countries in the world are seriously short of water, and my country is recognized by the United Nations as one of the countries with severe water shortage. However, about tens of billions of tons of sewage that can be used after advanced treatment is discharged without utilization in my country every year, resulting in a waste of water resources. Among them, the oil refining and chemical industries are major water users, and at the same time, they are also major polluters of the natural environment. Therefore, it is urgent to realize the resource utilization of sewage. [0003] The so-called "sewage" is formed by the pollution of fresh water through the production process. If we want to use sewage, we must remove pollutants in sewage as much as ...

AI Technical Summary

Problems solved by technology

[0004] Patent No. "CN200520130414.2" "Equipment for Recovery and Utilization of Oil Refining and Chemical Wastewater" uses reverse osmosis membrane to treat sewage, the degree of purification of polluted water has been improved to a certain extent, and the produced water can also be recycled, but the concentrated water is often not up to standard Discharge or not allowed to discharge, the problem of sewage discharge treatment has not been completely resolved

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