Catalytic cracking unit-hydrogenation unit combined energy-saving technological process

A technology for a catalytic cracking unit and a process flow is applied in the field of the combined energy-saving process flow of a catalytic cracking unit and a hydrogenation unit, which can solve the problems of large processing capacity and complex flow of the main fractionation tower, and achieves an increase in the overhead circulation of the main fractionation tower of the catalytic cracking unit. Effect of heat output, reduction of cooling load and rich gas compression load, and reduction of throughput

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the existing catalytic cracking unit absorbing and stabilizing the rich diesel oil in the main fractionating tower for re-refining, resulting in complex flow

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
  • Catalytic cracking unit-hydrogenation unit combined energy-saving technological process
  • Catalytic cracking unit-hydrogenation unit combined energy-saving technological process
  • Catalytic cracking unit-hydrogenation unit combined energy-saving technological process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] In this embodiment, a combined energy-saving technological process of catalytic cracking unit and hydrogenation unit, the following improvements are made on the original catalytic cracking unit and technological process:

[0032] The rich diesel oil at the bottom of the reabsorption tower is re-refined from the main fractionating tower and directly fed to the raw material buffer tank of the catalytic diesel hydrocracking unit, and the heat exchanger 11 of the original lean diesel oil to rich diesel oil is canceled, and other pipeline processes remain unchanged.

[0033] Its process flow chart is as figure 2 As shown, the specific process flow is as follows:

[0034] The reaction oil and gas from the reaction unit enters the lower part of the herringbone baffle of the main fractionation tower 1, contacts with the 275°C circulating oil slurry flowing down from the top of the herringbone baffle from bottom to top, and enters the fractionation part after being washed and d...

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 belongs to the technical field of petrochemical engineering, and discloses a catalytic cracking unit-hydrogenation unit combined energy-saving technological process. The technological process has the following improvements on the basis of a conventional catalytic cracking device and a conventional technological process: rich diesel oil at the bottom of a re-absorption tower is directly fed into a diesel oil catalytic hydrocracking device instead of being fed into a main fractionating tower for recycling in the prior art, a conventional poor diesel oil-rich diesel oil heat exchanger is cancelled, and other pipeline flows are not changed. According to the technological process, a rich diesel oil refining process of the catalytic cracking device is omitted; even if the rich diesel oil which is not subjected to refining treatment contains a certain amount of gasoline and LPG components, material balance of a combined device is not affected; and the rich diesel oil from the bottom of the catalytic reabsorption tower is directly subjected to hydrocracking, so the catalysis procedure for the rich diesel oil can be omitted, the processing load of the main fractionating toweris reduced, downstream hydrogenation is not influenced basically, and the method has remarkable innovative significance.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a combined energy-saving technological process of a catalytic cracking unit and a hydrogenation unit. Background technique [0002] Catalytic cracking is one of the main methods of petroleum secondary processing. It is the process of cracking heavy distillate oil under the action of high temperature and catalyst, and transforming it into gasoline, diesel oil and cracked gas. It consists of four parts: reaction regeneration, fractionation, absorption stabilization and flue gas energy recovery. The absorption stabilization includes condensed oil tank, absorption tower, reabsorption tower, desorption tower and stabilization tower. The purpose of reabsorption is to use diesel to secondarily absorb the lean gas from the top of the absorption tower, so that the dry gas product ≥C 3 The content of the components is less than or equal to 3% mol, so as to obtai...

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): C10G69/00
CPCC10G69/00C10G2400/02C10G2400/04
Inventor 李国庆李圣淋卓楷升
Owner SOUTH CHINA UNIV OF TECH
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