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Crude oil deep vacuum distillation process and system

A process method and deep drawing technology, which are applied in the field of crude oil vacuum deep drawing process method and system for improving extraction rate, crude oil distillation method and system, and can solve unfavorable vacuum distillation column operation, safety design and installation difficulty, etc. problems, to achieve the effect of improving gas-liquid separation effect, optimizing process design and reducing yield

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

AI Technical Summary

Problems solved by technology

Since the oil transfer line must be more than 15m (to ensure that the gas-liquid phase has a certain stratification time, which is conducive to improving product quality and the extraction rate of the vacuum distillation tower), the large-diameter and long-distance oil-transfer line occupies a large part

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  • Crude oil deep vacuum distillation process and system
  • Crude oil deep vacuum distillation process and system
  • Crude oil deep vacuum distillation process and system

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Embodiment Construction

[0043] combined with figure 1 , The technical process of the crude oil vacuum deep drawing process of the present invention is that the constant bottom oil 1 and the circulating vacuum residue 4 are mixed into the first-stage flash tower 7 . Under the stripping action of high-temperature hydrogen, the relatively lighter components flash out, and the gas phase, that is, a flash gas enters a flash gas liquid separation tank 12 after heat exchange, condensation and cooling, and the liquid phase of the liquid separation tank is used as the flash top product 16 discharge; the gas phase of the liquid separation tank is connected to the vacuum system 15 to control the pressure of the primary flash tower at 5kPa~20kPa. The liquid phase at the bottom of the primary flash tower is heated to 390°C to 420°C and enters the secondary flash tower 6. The gas phase at the top of the tower enters the secondary flash gas liquid separation tank 13 after heat exchange, condensation and cooling, an...

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Abstract

The invention discloses a crude oil deep vacuum distillation process and a system, a first-stage flash column is arranged between an atmospheric distillation column and a vacuum furnace, a vacuum transfer line from the outlet of the vacuum furnace to a vacuum distillation column is eliminated, a second-stage flash column is arranged between the vacuum furnace and the vacuum distillation column, the heavy oil on the bottom of the atmospheric distillation column, i.e. bottom oil, is mixed with cyclic vacuum residue and then the mixture enters into the first-stage flash column; the bottom oil of the first-stage flash column enters into the second-stage flash column with special structure after being heated by the vacuum furnace, the bottom oil of the second-stage flash column is introduced into the flash section of the vacuum distillation column for vacuum distillation. Gas phase producing is performed on the gas phase region upon at lease one liquid phase side line of the vacuum distillation column, and a vacuum pumping system is connected. Compared with the prior art, with the invention, on the one hand, the yield of vacuum residue can be reduced, and economic benefit of the device can be improved; and on the other hand, the load of the vacuum furnace and the vacuum distillation column can be reduced, the equipment investment can be saved, and the energy consumption of the device can be reduced.

Description

Technical field [0001] The invention belongs to the field of petroleum refining, specifically relates to a crude oil distillation method and system, and more specifically, a crude oil vacuum deep drawing process method and system that improves the extraction rate. technical background [0002] The crude oil atmospheric and vacuum distillation process is the first step in petroleum refining and is the "faucet" device of the refinery. The process uses the principle of distillation to divide crude oil into components with different distillation ranges to suit the products and downstream devices. Process requirements for raw materials. The conventional crude oil atmospheric and vacuum distillation process mostly adopts the "two furnaces and three towers" process: the crude oil enters the initial distillation tower (or flash tower) after pretreatment, and then is heated by the normal pressure furnace and enters the normal pressure distillation tower. The bottom of the normal pres...

Claims

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Application Information

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IPC IPC(8): C10G53/00C10G7/06
Inventor 张龙王海波齐慧敏
Owner CHINA PETROLEUM & CHEM CORP
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