Method for stable up-to-standard treatment and resource utilization of refinery wastewater

Abstract

The invention provides a method for stable up-to-standard treatment and resource utilization of refinery wastewater. The method can realize process flows of stable up-to-standard release of refinery wastewater and sewage recycling at the same time. According to the method, regulating tanks are additionally arranged to strengthen a pretreatment flow and the treatment depth of a sewage treatment system to ensure that important indexes of discharged water can stably reach standards, and a membrane bioreactor process is adopted to reach a sewage recycling standard, so that the stable up-to-standard release of discharged water of the refinery wastewater generated after crude oil poor-quality treatment as well as water saving and emission reduction recycling of the refinery wastewater are realized, and the process flow of ensuring the stable up-to-standard release of the refinery wastewater is realized by strengthening pretreatment and increasing the biological treatment depth. Meanwhile, the water saving and emission reduction of the refinery wastewater are realized through a sewage recycling process, part of the sewage is recycled, and the discharged quantity of the sewage can be reduced. The method provided by the invention can be used in the field of stable up-to-standard release and recycling of the refinery wastewater.

Description

technical field [0001] The invention relates to a method for treating sewage, in particular to a method for stably meeting standards and recycling oil refining sewage, which can be used in the field of stably meeting standards for discharging and reusing oil refining sewage. Background technique [0002] With the continuous increase of domestic oil processing and deep processing capacity, the demand for crude oil is increasing, coupled with the current refining trend of high-sulfur, high-acid, high-viscosity and low-quality crude oil. The inferior quality of crude oil has resulted in larger refinery wastewater discharges, more complex water quality, and greater difficulty in treatment. The original biochemical treatment capacity of most refineries will not be able to meet the requirements of wastewater discharge standards. As the public pays more attention to environmental protection, environmental standards are becoming stricter and law enforcement is intensified, and the r...

AI Technical Summary

Problems solved by technology

[0006] The invention discloses a method for the treatment of oil refinery sewage to meet the stable standard and resource utilization, aiming to provide a method for ensuring the "stable" standard discharge of the oil refinery sewage by strengthening the pretreatment and increasing the treatment depth after the crude oil is degraded; The problem that the water cannot meet the standard or cannot meet the standard stably, and the problem that the refining sewage of refining and chemical enterprises cannot be reduced and reused

Images