Reduction and resourceful treatment process and equipment for oily sludge and emulsified sump oil

Abstract

The invention discloses a reduction and resourceful treatment process and equipment for oily sludge and emulsified sump oil. The equipment comprises a raw material pump, a material homogenizing tank, and a variable-frequency electric field modification and electric field separation refining tank, and is used for separating the oily sludge and the emulsified sump oil, and the homogeneous water-containing and oil-containing sludge is subjected to variable-frequency electric field modification and electric field separation, so that the sludge, water and oil can be quickly and efficiently separated, the recycling of crude oil, the reduction of hazardous wastewater and the harmlessness of the subsequent treatment of the sludge are realized, the environmental protection concept is met, and the requirements of recycling, harmlessness and resourceful treatment of the crude oil are met; anddifferent types of high-voltage electric fields are introduced into treatment of oily sludge and emulsified dirty oil, so the crude oil recovery rate reaches 98% or above, and the purposes of crude oil recovery and hazardous waste reduction are really achieved.

Description

technical field [0001] The invention relates to the technical field of oily sludge treatment, in particular to a process and equipment for resource reduction treatment of oily sludge and emulsified waste oil. Background technique [0002] At present, no matter in the oil field or in the refinery, because the crude oil is driven out of the ground, especially in the late stage of the oil field, some forced extraction methods are adopted, a large amount of oily sludge and emulsified sludge will be generated in the process of crude oil refining, equipment maintenance and transformation. Oil, these oily sludges and emulsified oils are hazardous wastes, which are stored in waste oil tanks. After a long period of time, the waste oil tanks are also difficult to store, and they have to entrust a qualified third party to handle them, which costs a lot of money. A refinery with an annual processing capacity of 5 million tons is expected to spend 80 million yuan per year, not only a lar...

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Problems solved by technology

[0002] At present, no matter in the oil field or in the refinery, because the crude oil is driven out of the ground, especially in the late stage of the oil field, some forced extraction methods are adopted, a large amount of oily sludge and emulsified sludge will be generated in the process of crude oil refining, equipment maintenance and transformation. Oil, these oily sludge and emulsified dirty oil are hazardous wastes, which are stored in dirty oil tanks, accumulate over time, and it is difficult to store dirty oil tanks, so we have to entrust a qualified third party to handle them, which costs a lot of money

A refinery with an annual processing capacity of 5 million tons is expected to spend 80 million yuan per year, not only a large amount of economic investment, but also these hazardous wastes have an impact on the environment, and even qualified third parties often use incineration for disposal , also caused pollution to the atmosphere, and did not fundamentally solve the problem

[0003] At present, domestic and foreign methods for treating oily sludge and emulsified waste oil include: incineration, biological treatment, hot washing, solvent extraction, thermal cracking, etc. Although there are various treatment methods, they all have their own disadvantages. The incineration method consumes a lot of energy and will cause secondary pollution; the biological treatment method can only treat oily sludge with a low oil content, and the cycle is long; the oily sludge treated by the thermal washing method is not thorough, and the residue after treatment still needs to be treated twice Treatment; most of the organic solvents used in the solvent extraction method are toxic and volatile, and the treatment is not thorough; the thermal cracking method consumes less energy than incineration, but it is still high energy consumption, and the thermal cracking oil produced is complex and cannot be used rationally And it is easy to cause secondary pollution, and the oily sludge after simple dehydration needs to be dried

[0004] The above-mentioned equipment has various shortcomings, and has not really realized the resource recovery and utilization of crude oil. Some of them burn crude oil at high temperature to become organic VOC gas that pollutes the atmosphere, and some modify crude oil into solid waste. It is difficult to separate other extractants after they are miscible. Even though it is theoretically feasible, the treatment costs are high and the cycle is long, which cannot be accepted by oilfield and refinery owners.

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