Membrane filtration device, oily wastewater treatment system and method

Abstract

The invention discloses a membrane filtering device. The membrane filtering device is formed in the mode that a plurality of filtering units are stacked in a shell and then sealing is carried out, each filtering unit is composed of a laminate, a flow guide screen and a filtering membrane, each flow guide screen is arranged between the filtering membrane and the laminate, and each laminate and the corresponding filtering membrane are in sealing connection. Each filtering unit is provided with three through holes, and after the first through holes, the second through holes and the third through holes of the filtering units are stacked, a first pipeline-shaped channel, a second pipeline-shaped channel and a third pipeline-shaped channel are formed respectively. Connecting rings are arranged on the first through hole and the second through hole of each filtering unit, the connecting rings are connected with the laminates and the filtering membranes of the filtering units in a sealed mode respectively, and a sealing ring is arranged on each third through hole. The membrane filtering device of the structure is novel in structure, and the filtering area of the same occupied area is large. Meanwhile, the membrane filtering device is simple in structure and convenient to produce and use, and the manufacturing and maintenance cost can be reduced. An oily wastewater treatment system and method are further disclosed and can be widely applied to treatment of oily wastewater of various types.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a membrane filtration device, an oily wastewater treatment system and a method. Background technique [0002] With the advancement of science and technology and social development, the composition of sewage is becoming more and more complex. For example, edible oil contained in daily life, lubricating oil in industrial sewage, crude oil in oilfield wastewater, etc., these oily wastewater needs to be treated before they can be discharged. Currently, Some treatments are divided into two categories, one is to use chemical agents or microorganisms to degrade and discharge after reaching the discharge standard; the other is to incinerate through direct incineration or evaporation and concentration. Although chemical treatment can decompose oil pollution, it may cause water pollution. Microbial treatment has limited application and low treatment efficiency. Incineration treatmen...

AI Technical Summary

Problems solved by technology

Although chemical treatment can decompose oil pollution, it may cause water pollution. Microbial treatment has limited application and low treatment efficiency. Incineration treatment of waste gas may also require further waste gas treatment and consumes a lot of energy.

[0003] CN205115223U discloses an oily wastewater treatment device, which processes oily wastewater through a series of steps such as a separation tank, a reaction tank, and an oil removal tank. In the future, it is easy to be clogged and cause a decrease in filtration efficiency; after a long period of use, it is also prone to performance degradation caused by membrane aging

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