Pressure reduction distillation process method

The technology of vacuum distillation tower and vacuum furnace is applied in the vacuum distillation process of crude oil, and the vacuum distillation process field of improving the extraction rate of crude oil vacuum distillation process, which can solve the problem of high load of the top vacuum system and high energy consumption of the device. , complex tower structure and other problems, to achieve the effect of less equipment renovation, low investment and less equipment investment

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This utility model separates the rectifying section of the vacuum distillation tower from the deep drawing section at the lower part through a liquid seal device, which can consider the quality of the oil product and the extraction rate separately, and can relatively increase the vacuum extraction rate, but deep The quality of the extracted oil is difficult to meet the process requirements of the downstream device for raw materials. At the same time, the structure of the utility model is complex, the load of the vacuum system at the top of the tower is high, and the energy consumption of the device will be relatively high.

Method used

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Experimental program
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Effect test

Embodiment 1

[0036] The process of the invention is used in the design of a newly-built crude oil vacuum distillation unit.

[0037] The vacuum distillation process includes a vacuum furnace, a vacuum distillation tower, a gas-liquid separation tank for gas phase production, and vacuuming of the tower top and the tank top. The vacuum distillation tower is a structured packing tower, operated by a wet process, the bottom steam blowing volume is 1% of the tower feed mass, the top operating pressure is 1315kPa, and the pressure drop of the whole tower is 300Pa~500Pa. Using Kuwait atmospheric heavy oil as raw material, the vacuum distillation unit has a processing capacity of 1.2 million tons per year.

[0038] Atmospheric oil is fed into the vacuum distillation unit at a rate of 120 tons / hour, heated to 390℃~400℃ in the vacuum furnace, and then enters the vacuum distillation tower. The side stream product is withdrawn from the vacuum distillation tower. The vacuum residue is discharged from the ...

Embodiment 2

[0044] The method of the present invention is used for the expansion and transformation of a crude oil atmospheric and vacuum unit. The atmospheric part is the same as the conventional atmospheric and vacuum unit. The vacuum part mainly includes a vacuum furnace, a vacuum distillation tower, a gas-phase production gas-liquid separation tank, and a tower Vacuum top and tank top.

[0045] The vacuum distillation tower is a structured packing tower, operated by a wet process, the bottom steam blowing volume is 1% of the tower feed, the top operating pressure is 1.315kPa, and the pressure drop of the whole tower is 300Pa~500Pa. Using Kuwait atmospheric heavy oil as raw material, the vacuum distillation unit has a processing capacity of 1.2 million tons per year.

[0046] Atmospheric oil is fed into the vacuum distillation unit at a rate of 120 tons / hour, heated to 390℃~400℃ in the vacuum furnace, and then enters the vacuum distillation tower. The side stream product is withdrawn from ...

Embodiment 2 approach A

[0049] Table 2 Comparison of Scheme A and Scheme B in Example 2

[0050]

[0051] It can be seen from the table that the use of plan A to expand the capacity of the old device is less than that of plan B to build new equipment, and the amount of engineering renovation is small, so the project investment is less, the renovation period is shorter; the equipment income is also significantly better. Plan A has greater rectification advantages.

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Abstract

The invention discloses a pressure reduction distillation process method, in particular to a pressure reduction distillation process applicable to the pressure reduction deep drawing treatment of crude oil pressure reduction distillation. A gas phase extraction opening is arranged in a gas phase region above at least one side line outlet material liquid phase region, and the gas phase extraction opening is connected with a vacuum pumping system. The pressure reduction distillation process method is characterized in that the in-tower sectional vacuum pumping operation is carried out on the gas phase region above each condensing section in a pressure reduction distillation tower, so the vacuum degree in the pressure reduction distillation tower is improved, and further, the vacuum degree of the flash distillation section and the steam extraction section is improved, so more light ingredients in pressure reduction slag oil are evaporated out, and the drawing rate in the crude oil pressure reduction distillation process is obviously improved.

Description

Technical field [0001] The invention belongs to the field of petroleum refining and relates to a crude oil vacuum distillation process. Specifically, it relates to a vacuum distillation process that improves the extraction rate of crude oil in the vacuum distillation process. Background technique [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 is to divide the crude oil into components with different distillation ranges through distillation to adapt to the products and downstream devices. Process requirements for raw materials. The light oil yield and energy consumption directly affect the economic benefits of petroleum refining. [0003] The vacuum distillation process uses the principle of vacuum distillation to reduce the pressure on the liquid surface by vacuuming, thereby lowering the boiling point of the liquid and vaporizing the relatively lighter compon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/06
Inventor 张龙
Owner CHINA PETROLEUM & CHEM CORP
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