Microfiltration membrane oil filed sewage processing device and processing method

Abstract

The invention discloses a microfiltration membrane oil filed sewage processing device. The device comprises a flocculation settlement facility, a cyclone oil-water separator, a multistage mechanical filtering device, and a metal membrane filtering device, which are connected in sequence. The multistage mechanical filtering device comprises a walnut shell filtering device, a fine walnut shell filtering device, a modified fiber ball filtering device, and a dual-layer filtering material filtering device, which are connected in sequence. The sewage processing method comprises the following steps: removing pollutants by the flocculation settlement facility, pumping sewage into the cyclone oil-water separator to carry out separation, and filtering the separated water phase by the walnut shell filtering device, the fine walnut shell filtering device, the modified fiber ball filtering device, the dual-layer filtering material filtering device, and the metal membrane filter device to obtain qualified water phase. The design is novel, the operation is safe, stable, and reliable, the effect is good; the produced water in oil field can be purified and the processed water can reach the standards of reinjection. The provided device can realize gas-water combined backwashing, the backwashing effect is guaranteed, and the device can be used for a long term.

Description

technical field [0001] The invention belongs to the technical field of oilfield sewage treatment, and in particular relates to a microfiltration membrane oilfield sewage treatment device, and also relates to a sewage treatment method using the device. Background technique [0002] At present, most of my country's oilfields are in the middle and late stages of exploitation. During the development and production of oilfields, a large amount of oil extraction wastewater is generated, and most of the oil extraction wastewater is treated and reinjected into the oil layer. It is an economical and effective method to protect the environment and save a lot of water resources by reinjecting the oil field sewage into the oil reservoir after treatment. Oil production sewage not only contains petroleum components, but also contains solid suspended solids, emulsified oil, bacteria, and chemical agents (such as demulsifiers, flocculants, bactericides) and other components. When the oil c...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a microfiltration membrane oilfield sewage treatment device, which solves the problem that the existing treatment device will produce a filter cake layer and the membrane flux will decrease

[0007] Another object of the present invention is to provide a method for sewage treatment using the above-mentioned microfiltration membrane oilfield sewage treatment device, which solves the problem of low treatment accuracy of existing treatment methods

Images