A vacuum film evaporation device for aging oil
A vacuum film and evaporation device technology, applied in evaporation, chemical instruments and methods, separation methods, etc., can solve the problems of secondary emission pollution, poor fluidity, and high operating costs, and achieve high purification efficiency, long service life, and operating costs. low effect
Active Publication Date: 2022-03-29
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology
[0002] During the exploitation and transportation of offshore oilfields, a considerable part of the crude oil is transformed into aged oil due to various reasons. The physical and chemical quality of the oil changes, making it unusable. Due to the electrical conductivity of mechanical impurities and mud sand contained in the aged oil, it may be stored for a long time. Cause serious discharge accidents of electric dehydration equipment. In addition, aging oil will breed a large number of sulfate-reducing bacteria. If the sterilization is not thorough and enters the equipment and pipelines, it will corrode oilfield equipment and pipelines
[0003] The difficulties in the treatment of aging oil are as follows: First, the aging oil is a water-in-oil (W / O) emulsion with complex components and high stability, with an average water content of more than 30%. According to the crude oil export standard, The moisture content of crude oil exported shall not be higher than 0.5%, so the treatment of aging oil has extremely high requirements on the dehydration rate, which is difficult to achieve by general technical means; second, aging oil contains a large amount of colloid, asphaltenes and mechanical Impurities, these components are adsorbed on the oil-water interface film, resulting in difficulty in demulsification, which is not conducive to the oil-water separation of aging oil; third, colloids and asphaltenes make aging oil viscous and have extremely poor fluidity, which is not conducive to large-scale batch processing
[0004] Foreign countries adopt the method of establishing large-scale centralized processing stations and centrifugal sedimentation to process aging oil. Although this method has very high efficiency, it also has some shortcomings, such as high operating costs, long processing time, complex equipment structure, and occupied area. Large size and high operation and maintenance requirements
The domestic petrochemical industry uses traditional chemical processes to treat aging oil, and uses thermochemical sedimentation to separate oil from water. This not only takes a long time to process, consumes a lot of energy, and costs a lot, but it is also very likely to cause secondary discharge pollution.
The most important thing is that the above method is only suitable for the treatment of aging oil in onshore oilfields, but not for the online treatment of aging oil in offshore production platforms
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[0022] In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. As far as people are concerned, other embodiments can also be obtained according to these drawings on the premise of not paying creative work.
[0023] Such as figure 1 Shown:
[0024] The device 11 is in the shape of a tank body with a top end cover 4 and a bottom end cover 8 of the tank body. The top end cover 4 of the tank body and the bottom end cover 8 of the tank body are connected to the tank body 11 by bolts and sealed with a high temperature resistant sealing ring.
[0025] The device 11 is connected to the preheating tank 1 through an oil inlet pipeline provided with an oil inlet, a valve 2 and a gear oil suction pump 3. The end of the pipeline located in the de...
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The present invention is a vacuum thin film evaporation device for aging oil, which is characterized in that it is a device in the form of a tank, the device has an oil inlet and an oil outlet, and the device is equipped with a hollow hollow disk formed by stacking multi-layer hollow disc structures. Cylindrical degassing element, the hollow disc has a conical hole connecting the upper surface and the lower surface, and the degassing element is connected by a conical through hole to form a conical different-hole structure; the hollow cylinder of the degassing element is set in the heating On the sleeve; the air suction port on the device is connected with a gas-liquid separation tank through a pipeline, and the gas-liquid separation tank is connected with a vacuum pump. The invention can efficiently break the emulsified state of the aging oil and realize rapid and large-scale dehydration, so that the aging oil can be regenerated into crude oil that can be exported.
Description
technical field [0001] The invention relates to an oil-water separation device, in particular to a vacuum film evaporation device for aging oil. Background technique [0002] During the exploitation and transportation of offshore oilfields, a considerable part of the crude oil is transformed into aged oil due to various reasons. The physical and chemical quality of the oil changes, making it unusable. Due to the electrical conductivity of mechanical impurities and mud sand contained in the aged oil, it may be stored for a long time. Cause serious discharge accidents of electric dehydration equipment. In addition, aging oil will breed a large number of sulfate-reducing bacteria. If the sterilization is not thorough and enters the equipment and pipelines, it will corrode oilfield equipment and pipelines. [0003] The difficulties in the treatment of aging oil are as follows: First, the aging oil is a water-in-oil (W / O) emulsion with complex components and high stability, with ...
Claims
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IPC IPC(8): B01D1/22
CPCB01D1/22
Inventor 柳忠彬孙兆略王欢张海周
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING