Pipeline-type combined automatic sewage filtering device and method thereof

Abstract

The invention belongs to the technical field of sewage treatment, particularly relates to an oilfield produced water treatment system, and particularly relates to a pipeline-type combined automatic sewage filtering device and a method thereof. The device comprises a filtering unit, a filtering water inlet unit, a filtering water outlet unit, a backwashing water inlet unit, a backwashing water outlet unit, a pollution discharge unit and a control unit; wherein the filtering water inlet unit, the filtering water outlet unit, the backwashing water inlet unit, the backwashing water outlet unit andthe pollution discharge unit are connected with the filtering unit, and a controller controls the filtering unit, the filtering water inlet unit, the filtering water outlet unit, the backwashing water inlet unit, the backwashing water outlet unit and the pollution discharge unit. The number and the layout of the filter units and the number of the filters can be determined according to the size and the shape of a test site, and the problem that field installation and layout of the filters are limited is solved; backwashing of the filter unit and replacement of the filter screen and a filter material are carried out independently, filtration of other filter units is not affected, and continuity of whole sewage treatment is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an oilfield produced water treatment system, in particular to a pipeline-type combined sewage automatic filtering device and method. Background technique [0002] Most oilfields in China have entered the stage of high water-cut development, the rate of increase of water cut is obviously accelerated, and the production decline is obvious. More than 95% of the oil fields have a water content of production fluid greater than 90%. Therefore, the amount of sewage that needs to be treated is increasing year by year. In the prior art, the sewage treatment filter usually adopts a tank structure, which usually has the following problems: the cross-sectional area of ​​the filter material is large, the volume is large, and the backwashing is easy to cause uneven cleaning of the filter material and the filter screen, thereby affecting the filtering effect It is troublesome to replac...

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Problems solved by technology

The number and layout of the filter units of the present invention and the number of filters of each filter unit can be determined according to the size and shape of the test site, which solves the problem that the available areas such as offshore drilling and production platforms and oil well metering stations are relatively narrow due to space constraints , The on-site installation and layout of the filter are limited, which affects the amount of sewage treatment and cannot meet the needs of oilfield production and operation

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