Processing unit for reclaiming dirty oil from united station in oil field

Abstract

The invention relates to recovering and processing device for sump oil created in oil field. It is for resolving the problem that sump oil containing black solid particles in liquid mined from oil field is difficult to treatment. The divece consists of sump oil single screw lift pump, pipe mixer, three-phase centrifuge, sewage recovering tank, sewage recovering pump, heat buffer separator, sump oil lift pump, solid dregs recovering tank, sewage recovering pump, dregs cleaning tank and lift pump. the pipe mixer is connected with entrance of single-screw lift pump and centrifuge, the sewage exit of centrifuge is connected with and end of sewage recovering tank, crude oil exit of centrifuge is connected with entrance of heat buffer separator.

Description

Technical field: [0001] The invention relates to a device for recovering and treating the waste oil produced in the production fluid treatment facility of an oilfield combined station. Background technique: [0002] In recent years, sewage oil containing black solid particles has successively appeared in the production fluid treatment facilities of some joint stations in many oil fields. Among them, the sewage oil in the upper part of the sewage settling tank and deoiling tank, due to the enrichment of a large number of black solid particles, It has caused great difficulties in the treatment of production fluid and oily sewage, which not only deteriorates the water quality of oily sewage after treatment, but also can lead to pollution of oily sewage filters and sewage reinjection systems in severe cases; if the sewage settling tank and deoiling tank When the dirty oil containing black solid particles enriched in the upper part is recycled to the crude oil dehydration system ...

AI Technical Summary

Problems solved by technology

[0002] In recent years, sewage oil containing black solid particles has successively appeared in the production fluid treatment facilities of some joint stations in many oil fields. Among them, the sewage oil in the upper part of the sewage settling tank and deoiling tank, due to the enrichment of a large number of black solid particles, It has caused great difficulties in the treatment of production fluid and oily sewage, which not only deteriorates the water quality of oily sewage after treatment, but also can lead to pollution of oily sewage filters and sewage reinjection systems in severe cases; if the sewage settling tank and deoiling tank When the dirty oil containing black solid particles enriched in the upper part is recycled to the crude oil dehydration system for treatment, an intermediate transition layer is easily formed in the electric dehydrator, which often causes the electric dehydrator to cross the electric field, seriously affecting the normal production of the crude oil dehydration system run

In order to ensure the normal treatment of the produced fluid and oily sewage in the combined station system, when there is too much sewage oil enriched in the sewage settling tank and oil removal tank, it is often necessary to directly discharge it, which not only loses a lot crude oil, which also caused serious environmental pollution

Images