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Reduced-pressure flash tank and crude oil processing method

A technology of crude oil processing and flash tank, which is applied in the field of decompression flash tank and crude oil processing to improve the extraction rate of crude oil processing, and can solve the problems of limited function of the flash tower, so as to improve the gas-liquid separation effect and increase the evaporation rate. The effect of low rate and pressure

Active Publication Date: 2014-04-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the bottom oil of the atmospheric tower enters the flash tower, since the temperature of the bottom oil of the atmospheric tower is relatively low, and the vacuum degree of the flash tower in front of the furnace is relatively low, the effect of flash vaporization of the flash tower is limited, and the flash The gas phase at the top of the steamer enters the vacuum tower, which is equivalent to segmental feeding of the vacuum tower after flash evaporation, without fundamentally changing the fractionation effect of the vacuum tower

Method used

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  • Reduced-pressure flash tank and crude oil processing method
  • Reduced-pressure flash tank and crude oil processing method
  • Reduced-pressure flash tank and crude oil processing method

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Embodiment Construction

[0037] combined with figure 1 , a kind of technical process of the method of the present invention is: after pretreatment crude oil 1 is heated up to 360 ℃~370 ℃ through atmospheric heating furnace 17, enters atmospheric distillation tower 5, and distills off constant top product 11 and each side stream atmospheric distillate oil 16 . The constant bottom oil 15 and the flash top gas are heated by heat exchange and then enter the decompression furnace 2 to be heated to 380°C-400°C, and enter the decompression flash tank 4 from the feed port 19 of the decompression flash tank through the inlet distributor 18 for gas-liquid separate. The gas phase rises and is discharged from the gas phase outlet on the top of the tank. After the constant bottom oil / flash top gas 6 heat exchange-flash top gas condenser 14 is condensed, the gas-liquid separation is carried out, and the separated liquid phase is used as the flash top product 8, and the gas phase is connected The vacuum system con...

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Abstract

The invention discloses a reduced-pressure flash tank and a crude oil processing method. The reduced-pressure flash tank comprises a tank body and an in-tank membrane, wherein the internal membrane comprises a feed inlet distributor arranged in a gas phase area on the upper part of the reduced-pressure flash tank and a rotating disc arranged above the liquid surface of a liquid phase area on the lower part of the reduced-pressure flash tank; and the rotating disc is fixed on a rotating shaft arranged at a radical axial center position of the tank body. In the crude oil processing method disclosed by the invention, the reduced-pressure flash tank is arranged between a reduced-pressure furnace and a reduced-pressure distillation tower, a reduced-pressure distillation raw material is heated in the reduced-pressure furnace and then enters the reduced-pressure flash tank for evaporation and gas-liquid separation, a liquid phase, namely bottom oil, discharged from the bottom of the reduced-pressure flash tank is introduced into the reduced-pressure distillation tower, and a gas phase, namely flash top gas, discharged from the top of the reduced-pressure flash tank is discharged out of the flash tank and condensed into a liquid phase to be led out of the device. When the reduced-pressure flash tank and the crude oil processing method are used, the drawing rate of a crude oil reduced-pressure distillation process is increased obviously, process energy consumption is reduced, and the economic benefit of the device is increased.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and relates to a decompression flash tank and a crude oil processing method, in particular to a method and a device for improving the extraction rate in the crude oil processing process. Background technique [0002] Crude oil processing is the first process of petroleum refining, which is to divide crude oil into components of different distillation ranges by means of atmospheric and vacuum distillation, so as to meet the technological requirements of products and downstream equipment for raw materials. The level of its light oil yield and the size of energy consumption directly affect the economic benefits of petroleum refining. The conventional atmospheric and vacuum distillation process of crude oil mostly adopts the process of "two furnaces and three towers": the crude oil is pretreated and enters the primary distillation tower (or flash tower), and then is heated in the normal pressure fur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/10C10G7/06C10G53/00
Inventor 张龙姜阳王海波
Owner CHINA PETROLEUM & CHEM CORP
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