Process method for treating oily sludge of oil field

Abstract

The invention discloses a process method for treating oily sludge of an oil field. The oily sludge is decomposed into water, crude oil, tailings and gas through oily sludge screening, oily sludge drying, oily sludge crushing, oily sludge homogeneous feeding, oily sludge preheating, oily sludge pyrolysis and oil gas treatment. Water can be recycled, the crude oil can be stored, the tailings can be used as building raw materials, gas discharge reaches standards and oily sludge resourceful treatment is realized. The oily sludge screening process screens bulk materials and impurities. The oily sludge drying process is used for reducing water content of semi-fluid / fluid oily sludge having water content greater than 40% to 40% or less. The oil gas treatment process is used for transforming gas produced by pyrolysis into water, crude oil and gas satisfying emission standards through condensation, oil-water separation, high-temperature combustion and tail gas desulfurization and denitrification. The process method has the advantages of reasonable design, safety, environmental friendliness, good treatment effect, high treatment efficiency, cost saving, economical efficiency, applicability and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of oil sludge treatment, and in particular relates to a process for treating oilfield sludge. Background technique [0002] At present, the harmless treatment technology of oil sludge includes immobilization treatment, biological treatment, incineration and other technologies. The comprehensive utilization technology includes thermal decomposition, brick making and paving and other uses. There are various treatment technologies for oily mud sand, and each method has its own advantages. Disadvantages and scope of application. [0003] The existing patent document "A Process for Treating Oilfield Sludge" (CN106242205A) introduces a process for treating oilfield sludge. By adding chemicals, water, etc., the oil content is ≤2%, and the water content is about 80%. Sludge, water and crude oil have realized the reduction and recycling of oily sludge, but the disadvantage of this patent is the addition of chemicals...

AI Technical Summary

Problems solved by technology

[0003] The existing patent document "A Process for Treating Oilfield Sludge" (CN106242205A) introduces a process for treating oilfield sludge. By adding chemicals, water, etc., the oil content is ≤2%, and the water content is about 80%. Sludge, water and crude oil, realized oily sludge reduction and resource treatment, but the disadvantage of this patent is that the addition of chemicals increases the secondary pollution of sludge

The treated oil sludge is still a solid waste and has not been treated as a resource

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