Crude oil deep vacuum distillation process and system
A process method and deep drawing technology are applied in the crude oil vacuum deep drawing process method and system for improving the extraction rate, and the crude oil distillation method and system field, which can solve the problems of unfavorable vacuum distillation column operation, safety design and installation difficulty, etc. problems, to improve the effect of gas-liquid separation, optimize process design, and improve the effect of flash evaporation
A process method and deep drawing technology are applied in the crude oil vacuum deep drawing process method and system for improving the extraction rate, and the crude oil distillation method and system field, which can solve the problems of unfavorable vacuum distillation column operation, safety design and installation difficulty, etc. problems, to improve the effect of gas-liquid separation, optimize process design, and improve the effect of flash evaporation
CN102443420BActive Publication Date: 2014-03-05CHINA PETROLEUM & CHEM CORP +1
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[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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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, and in particular relates to a crude oil distillation method and system, and more specifically to a crude oil vacuum deep-drawing process method and system for improving the extraction rate. technical background [0002] Atmospheric and vacuum distillation of crude oil is the first process of petroleum refining, and it is the "leading" device of the refinery. The process is to divide crude oil into components of different distillation ranges through the principle of distillation, so as to adapt to products and downstream devices. Process requirements for raw materials. The conventional atmospheric and vacuum distillation process of crude oil mostly adopts the process of "two furnaces and three towers": crude oil enters the primary distillation tower (or flash tower) after pretreatment, and then enters the atmospheric distillation tower after being heated in the normal pressure furnace, and the b...
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Patent Timeline
05 Mar 2014
Publication
CN102443420B
- IPC
- C10G53/00; C10G7/06
- Inventors
- 张龙; 王海波