Treatment device for sewage discharged from circulating water

Abstract

The application provides a treatment device for sewage discharged from circulating water. The treatment device includes a reuse treatment unit, which includes air flotation equipment, biological aerated filter, the first high-efficiency sedimentation tank, filtration equipment, ultrafiltration equipment and reverse osmosis equipment, and the sewage outside the circulating water is treated by the reuse treatment unit Finally, reuse fresh water and concentrated brine are obtained, and the salt content in the concentrated brine is greater than that of the reused fresh water. The treatment device enables the circulating water to be regenerated water after advanced treatment, which can be used as the replenishment water of the circulating system, which greatly improves the sewage reuse rate of refining and chemical enterprises, reduces the consumption of fresh water, saves the operating costs of enterprises and reduces the pollution of external drainage to the environment . The reused fresh water treated by the above-mentioned reuse treatment unit can be used as circulating water to soften and sterilize the water quality of the circulating water system, reduce the dosage of chemicals, reduce the conductivity of the circulating water system, and effectively improve the circulation. Water concentration ratio.

Description

Treatment device for external sewage discharged from circulating water technical field [0001] The application relates to the field of sewage treatment, in particular, to a treatment device for externally discharging sewage from circulating water. Background technique Existing fuel type oil refinery enterprise circulating water field discharge sewage, because of circulating water concentration multiple requirement, evaporation and chemical reaction [0002] With the addition of chemical agents, the COD and total phosphorus content of the discharged sewage is relatively high and mostly refractory to biodegradable organic matter, calcium and magnesium ions, Total nitrogen and ammonia nitrogen are relatively high, and their biodegradability is poor. Most of them are incorporated into the oily sewage system. After mixed treatment, the circulating water system is reused, which is easy to create. The conductivity of the circulating water continued to rise, and the system was co...

AI Technical Summary

Problems solved by technology

[0009] The main purpose of this application is to provide a treatment device for circulating water discharged from fuel-based oil refineries, so as to solve the problem in the prior art of regenerating water with mixed sewage from oil refining and recycling the circulating water system with low reuse rate

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