Reduced pressure distillation method and device

A distillation method and vacuum distillation tower technology, applied in the field of petroleum refining, can solve the problems of thermal stress safety design and installation difficulty, unfavorable vacuum distillation tower operation, etc., to improve the gas-liquid separation of feed and save equipment investment , Reduce the effect of condensation and vacuum load

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • 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 beneficial to improve product quality and the extraction rate of the vacuum tower), the large-diameter and long-distance oil transfer line occupies a large part of the investmen

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reduced pressure distillation method and device
  • Reduced pressure distillation method and device
  • Reduced pressure distillation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The method of the invention is used in the design of a new crude oil atmospheric and vacuum device.

[0036] The processing capacity of the decompression unit is 1.2 million tons per year, and the decompression process includes a decompression furnace, a flash tower, and a decompression tower. The decompression tower is a structured packing tower, which adopts wet process operation. The steam blowing volume at the bottom of the tower is 1% of the tower feed, the operating pressure at the top of the tower is 1.315kPa, and the pressure drop of the whole tower is 600Pa~750Pa.

[0037] The normal bottom oil is fed into the vacuum distillation unit at a rate of 150 tons per hour, heated to 390°C to 400°C by a vacuum furnace, and then enters the vacuum flash tower. The oil transfer line is canceled, the flash tower is directly connected with the vacuum tower, and the pressure of the flash tower is 10kPa. After adiabatic flash evaporation, the flash top gas accounts for 45.67...

Embodiment 2

[0043] The method of the present invention is used for the expansion and transformation of a certain crude oil atmospheric and vacuum device. The normal pressure part is the same as the conventional atmospheric and vacuum device, and the decompression part mainly includes a decompression furnace, a flash tower and a decompression tower.

[0044] The decompression tower is a structured packing tower, the operating pressure at the top of the tower is 1.315kPa, and the pressure drop of the whole tower is 600Pa~750Pa.

[0045] The normal bottom oil enters the vacuum distillation unit, is heated to 390°C to 400°C by a vacuum furnace, and then enters the vacuum flash tower. Cancel the oil transfer line, the flash tower is directly connected with the vacuum tower, the pressure of the flash tower is 10kPa, the flash top gas accounts for 45.67% of the feed after the adiabatic flash, the flash bottom oil enters the vacuum tower 15, and the side line of the vacuum tower The products 10, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a reduced pressure distillation method and a reduced pressure distillation device. A flash tower is arranged between a reduced pressure furnace and a reduced pressure distillation tower, an oil transfer line is canceled, a reduced pressure distillation raw material is heated in the reduced pressure furnace and then directly enters the flash tower, and gas-liquid separation is performed in the flash tower; the liquid phase, namely flash bottom oil, discharged from the bottom of the flash tower is introduced into the reduced pressure distillation tower; and the gas phase, namely flash top gas, discharged from the top of the flash tower is condensed into liquid phase, and the liquid phase is led out of the device. According to the reduced pressure distillation method and the reduced pressure distillation device using the flash tower in back of the reduced pressure furnace, on the one hand, the yield of reduced pressure distillate is improved; and on the other hand, the conventional reduced pressure oil transfer line is canceled, the operation load of the reduced pressure tower is reduced, and the diameter of the reduced pressure tower can be properly reduced so that the equipment investment is saved and the operation cost is lowered.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a process and device for vacuum distillation of crude oil, and more specifically to a vacuum distillation method and a method for improving extraction rate, reducing energy consumption, and saving investment. device. technical background [0002] Atmospheric and vacuum distillation of crude oil is the first process of petroleum refining. It divides crude oil into components with different distillation ranges by distillation to meet the process 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D3/10C10G7/06
Inventor 张龙王海波齐慧敏刘忠信
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap