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Method for treating ageing oil

A treatment method and technology for aging oil, which is applied in the direction of multi-stage serial refining process treatment, etc., can solve the problems of harmfulness, serious chemical pollution of oilfield sewage, toxic chemicals, etc., and achieve the effect of improving treatment efficiency

Inactive Publication Date: 2011-09-14
李宏亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual treatment method for aging oil is to add chemicals for treatment, and the chemicals themselves are usually poisonous and harmful. At the same time, the oilfield sewage obtained after chemical treatment is seriously polluted by chemicals, which will inevitably have a great impact on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Heat the aging oil to 96°C, add demulsifier P992X and mix evenly. The amount of demulsifier added is 0.01% of the weight of the aging oil. Use a horizontal centrifuge to separate the two phases. Centrifuge at 3600RPM for 5 seconds to obtain the oil phase and Slag phase, discard the slag phase located in the lower layer. The type of horizontal centrifuge is a horizontal screw discharge filter sedimentation centrifuge, which has a good separation effect for separating liquids with an impurity content greater than 1%. The obtained oil phase is pressurized by a centrifugal pump at a temperature of 95°C, and then enters a butterfly separator with a pressure of 0.5 kg for three-phase separation. It is centrifuged at a speed of 6400 RPM for 3 seconds, and the oil phase, water phase and slag phase are separated and discarded. Remove the water phase located in the middle layer and the slag phase located in the lower layer, and recover the oil phase.

[0030] In the two separati...

Embodiment 2

[0032] The specific scheme is the same as in Example 1, the difference is that: heat the aged oil to 90°C, add a demulsifier and mix evenly, the amount of the demulsifier added is 0.005% of the weight of the aged oil; the rotational speed of the two-phase separation is 3300RPM; the two-phase separation The obtained oil phase was pressurized to 1 kg by a centrifugal pump at a temperature of 97° C. and then entered into a disc separator for three-phase separation. The rotation speed of the three-phase separation was 6700 RPM.

Embodiment 3

[0034] The specific scheme is the same as that in Example 1, the difference is that: heat the aged oil to 95°C, add a demulsifier and mix evenly, the amount of the demulsifier added is 0.008% of the weight of the aged oil; the rotational speed of the two-phase separation is 3400RPM; the two-phase separation The obtained oil phase was pressurized to 0.8 kg by a centrifugal pump at a temperature of 96° C. and then entered into a disc separator for three-phase separation. The rotation speed of the three-phase separation was 6500 RPM.

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Abstract

The invention belongs to the technical field of waste recycling and relates to a method for treating ageing oil. The method comprises the following steps of: (a) heating the ageing oil to 90-97 DEG C and then adding an emulsion breaker to the heated ageing oil to be uniformly mixed, wherein the adding quantity of the emulsion breaker is 0.005-0.01%; (b) primary separation: carrying out two-phase separation on the ageing oil obtained in the step (a) in a horizontal centrifugal machine to obtain an oil phase and a slag phase, wherein the rotation speed is controlled at 3300-3600 RPM; and (c) secondary separation: carrying out three-phase separation on the liquid phase obtained in the step (b) in a disc type separator at a rotation speed of 6400-6700 RPM so as to obtain an oil phase, an aqueous phase and a slag phase; and discarding the aqueous phase and the slag phase and recycling the oil phase. In the invention, by using a two-step separation method, the slag in the ageing oil is removed and the ageing oil is dehydrated; and the minimum water content of the treated oil phase can reach 0.1% and is far less than a general outward water content standard 0.5 percent. Therefore, the ageing oil can be directly sold after being recycled so that the defect of serious environment pollution caused by using chemicals in treatment at present is solved.

Description

technical field [0001] The invention belongs to the technical field of waste recovery and relates to a treatment method for aging oil. Background technique [0002] In recent years, due to the use of polymers in oilfields, the production of sediment, and the generation of sulfate-reducing bacteria, it is difficult to treat oil and water in oilfields, and eventually lead to the generation of aged oil. 1) The accumulation of aging oil occupies a large amount of storage capacity, which directly affects the production of the oil field; 2) The crude oil contained in the aging oil cannot be recovered, resulting in a waste of resources; 3) Some aging oil that is difficult to recover can only be accumulated in the sludge pool or filled Burial treatment will cause serious pollution to the water and soil environment in the area. Therefore, aging oil has become an important factor restricting oil field safety production and environmental protection. Aged oil is usually treated by add...

Claims

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Application Information

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IPC IPC(8): C10G53/02
Inventor 李宏亮
Owner 李宏亮
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