Pretreatment system and pretreatment method for oily sludge

Abstract

The invention discloses a pretreatment system and a pretreatment method for oily sludge. The pretreatment system comprises an oily sludge pretreatment device and a two-phase horizontal screw centrifugal dehydrator. The pretreatment system and the pretreatment method for the oily sludge have the advantages that few devices are used, each device is safe and reliable, the operation is convenient, the occupied area is small, the operation load is proper, and on-site rapid pretreatment and reduction of a large amount of oily sludge generated in the construction operation and ground production process of an oil well with high oil content, high water content and high solid content in a dispersed block can be realized; meanwhile, the environmental protection problem and the penalty problem caused by environmental pollution due to on-site discharge of the oily sludge are solved; the pretreatment system is convenient to transport, equipment is combined and integrated, can be moved in a skid-mounted mode and assembled on site, and the requirement for sludge pretreatment construction operation of an oil field at any time is met.

Description

Technical field [0001] The present invention relates to the field of oil-containing sludge treatment, in particular to a pretreatment system and a pretreatment method of oil-containing sludge, wherein the oil-containing sludge is produced during oil field development and production. Background technique [0002] Oilfield development operations and ground production will result in a large amount of oil-containing, such as sludge produced by the sewage treatment system, oil tank joints, sludge, drilling mud, pressing, drilling mud, pressing oil after all types of pipeline equipment Fracture, etc. [0003] For the sludge and tank sewed in the sewage treatment system, if it is not cleaned up in time, it will not only reduce the processing efficiency and effect of the equipment, but also increase the operation load of the device itself. For example, if the sludge and tank joints generated in the oil water sedimentation separation equipment in the sewage treatment system are not cleane...

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Problems solved by technology

However, the oily sludge pretreated by the existing treatment system and process may exceed the standard due to the oil content, which will cause pollution during the incineration of the oily sludge and it is difficult to meet the requirements of the national environmental protection standard, which means that the production enterprises will face Pressure to pay huge sewage charges and environmental penalties

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