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Atmospheric vacuum distillation method and apparatus with vacuum flash vaporizer

A technology of atmospheric and vacuum distillation and flash tower, which is applied in the field of atmospheric and vacuum distillation methods and equipment, which can solve the problems of no significant change in energy consumption of the device and large investment in the device, and achieve the reduction of the scale of the main equipment, small investment in equipment, Effect of reducing heat load

Inactive Publication Date: 2009-03-04
TIANJIN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the new addition of a first-level vacuum furnace and a first-level vacuum tower, the investment in the device is still relatively large, and the energy consumption of the device has not changed significantly.

Method used

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  • Atmospheric vacuum distillation method and apparatus with vacuum flash vaporizer

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Effect test

Embodiment 1

[0027] The method of the present invention is used for the transformation of a certain atmospheric pressure reducing device, and the atmospheric pressure part is the same as that of a common ordinary pressure reducing device, and the pressure reducing part adopts such as: figure 1 As shown in the decompression process of the atmospheric and vacuum distillation apparatus with a vacuum flash column, the main equipment of the decompression part includes a vacuum flash column 2, a vacuum furnace 7, and a vacuum column 9. The normal bottom oil 1 first enters the vacuum flashing tower 2 for flashing, the flash top gas 3 enters the upper or middle part of the vacuum tower 9 through the pipeline, and the flash bottom oil 5 enters the vacuum furnace 7 for heating through the flash bottom oil pump 6, and is heated in the vacuum furnace 7. Partial vaporization in the pressure furnace obtains the vacuum tower feed in a gas-liquid mixed state, and enters the flash section 10 of the vacuum t...

Embodiment 2

[0032] The method of the present invention is used in the design of a new atmospheric and vacuum unit, except that no washing oil is introduced into the upper part of the vacuum flash tower, the rest of the process is the same as the appendix. figure 1 same as shown.

[0033] The processing capacity of the unit is 5 million tons / year of crude oil. The vacuum process mainly includes vacuum flash column, vacuum furnace and vacuum tower. The decompression tower is a fuel type, with a slightly wet operation, with a total of four side-line products. No scrubbing oil is added to the upper part of the vacuum flash tower.

[0034] The operating pressure at the top of the vacuum flash tower is 35 mmHg, and the amount of flash top gas accounts for 32% of the feed amount of the flash tower. The operating pressure at the top of the vacuum tower is 15mmHg, and the flash top gas enters the vacuum tower from above the extraction outlet of the second line; the flash bottom oil is heated to...

Embodiment 3

[0037] The method of the present invention is used for the design of a new atmospheric and vacuum unit, the upper part of the vacuum flash tower does not introduce washing oil, the number of products in the side line of the vacuum is 6, and the side line is added with a stripper, and the rest of the process is the same as the appendix. figure 1 same as shown.

[0038] The processing capacity of the unit is 8 million tons / year of crude oil. The vacuum process mainly includes vacuum flash column, vacuum furnace and vacuum tower. The decompression tower is lubricating oil type, wet operation, and there are 6 side line products in total. No scrubbing oil is added to the upper part of the vacuum flash tower.

[0039]The operating pressure at the top of the decompression flash tower is 200mmHg, and the amount of flash top gas accounts for 4.7% of the feed amount of the flash tower. The operating pressure at the top of the decompression tower is 25mmHg, and the flash top gas enter...

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Abstract

The invention relates to an atmospheric and vacuum distillation device with a vacuum flash tower and a method thereof. The atmospheric and vacuum distillation device with a vacuum flash tower is characterized in that the vacuum flash tower arranged in front of a vacuum furnace is connected with the vacuum furnace and a vacuum tower through a pump and a pipeline. Constant bottom oil (1) is introduced into the vacuum flash tower (2)at first, and the operation pressure at the top part of the vacuum flash tower is higher than the operation pressure at the top part of the vacuum tower (9) by10 to 200mmHg; Flash cap gas (3) is introduced into the upper part or the lower part of an outlet for a side product which is similar to Flash cap gas fraction; flash bottom oil (5) is introduced into the vacuum furnace (7) through a flash bottom oil pump (6); when the flash bottom oil is heated to 350 to 430 degrees, air-liquid mixing vacuum tower feed material is obtained through partial vaporization and is introduced into a flash evaporation segment (10) of the vacuum tower through a transfer line (8); and products with different fractions are drawn from the side of the vacuum tower and vacuum residue is drawn from the bottom of the vacuum tower. Through adding the vacuum flash tower to improve the working process of the atmospheric and vacuum distillation device, the invention achieves the advantages of increasing treatment capacity, increasing vacuum distillation yield, and reducing energy consumption.

Description

technical field [0001] The invention belongs to the field of petroleum refining, in particular to an atmospheric and vacuum distillation method and equipment with a vacuum flash column. Background technique [0002] Atmospheric and vacuum distillation of crude oil is the leading device in petroleum refining. At present, atmospheric and vacuum distillation technology mostly adopts the process of "two furnaces and three towers". The main equipment includes: primary distillation tower (or flash tower), atmospheric furnace, Pressure towers, decompression furnaces and decompression towers. [0003] In recent years, with the rapid development of my country's economy, the demand for fuel oil has grown rapidly, and many old atmospheric and vacuum units need to be expanded and transformed. On the other hand, the variety and properties of crude oil processed by many refining units have undergone great changes, resulting in great changes in the extraction rate of atmospheric pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/10C10G7/06
CPCC10G7/06
Inventor 张吕鸿张道光吴衍兴刘志杰罗铭芳姜斌迟春红王玉斌田爽
Owner TIANJIN UNIV
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