Combined process method of lightening residual oil/ medium and low temperature coal tar

A low-temperature coal tar and combined process technology, applied in the fields of oil refining, coal chemical industry, and petrochemical industry, can solve the problems of low gasoline yield, large heat energy loss, and high equipment investment, and achieve improved cracking performance, increased yield, and simplified process flow Effect

Active Publication Date: 2013-09-18
SINOPEC NANJING ENG & CONSTR +1
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two combined processes of hydrotreating and catalytic cracking have disadvantages such as low gasoline yield, large heat energy loss, and high equipment investment.

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
  • Combined process method of lightening residual oil/ medium and low temperature coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]In this embodiment, the vacuum residue A is used as the raw material, and the operation is carried out by organically combining the four units of residue hydrotreatment-delayed coking-catalytic cracking-PSA purification. After the vacuum residue passes through the hydrotreating unit, all products of the hydrotreating are directly sent to the delayed coking unit without separation. In the delayed coking unit, the residual oil after hydrogenation first enters the waste heat recovery device to exchange heat with the flue gas from the heating furnace, and then enters the coking heating furnace, coke tower and fractionation system in sequence after the heat exchange. All the wax oil obtained from the fractionation system enters the catalytic cracking unit, and the catalytic cracking unit only has a reaction-regeneration system. The oil and gas obtained from the reaction enter the fractionation system, and are fractionated together with the oil and gas from the coke tower.

[...

Embodiment 2

[0051] In this example, the vacuum residue B is used as the raw material, and the process method adopted is the same as in Example 1. The operating conditions, product distribution and coke properties are shown in Tables 3, 4 and 5, respectively.

[0052] Comparing the results of the invention, it can be seen that by adopting the method of organically combining the four units of residual oil hydrotreating-delayed coking-catalytic cracking-PSA purification, the raw material oil can be converted into finished gasoline and diesel oil and high-quality coke to the greatest extent, and the raw material utilization rate is 100%. Compared with the conventional residual oil hydrogenation-delayed coking-catalytic cracking process, the process can save energy by 40%, save new hydrogen consumption by 50%, and save equipment investment by 40%.

[0053] Table 1 Properties of vacuum residue

[0054] Raw oil number

Vacuum residue A

Vacuum residue B

Density at 20°C, g / c...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a combined process method of lightening residual oil / medium and low temperature coal tar. Raw material oil enters a hydrotreating unit after being mixed with hydrogen to perform a hydrogenation reaction in the presence of a hydrogenation catalyst; all hydrogenation products enter a delayed coking unit without being separated to perform a thermal cracking reaction so as to prepare high quality coke; tower top oil gas obtained by a coke chamber of the delayed coking unit enters a fractionating system to be fractionated so as to separate out dry coking gas, gasoline, diesel oil, wax oil and heavy distillate oil; all wax oil enters a catalytic cracking unit to perform a catalytic cracking reaction, the catalytic cracking unit and the delayed coking unit share one fractionating system, and the oil gas obtained by catalytic cracking enters the fractionating system; and the dry coking gas enters a PSA purification unit after being desulfurized, and the obtained hydrogen is recycled in the hydrotreating unit. The method can be used for maximizing the production of light oil, obtaining clean finished product oil, producing high quality coke, simplifying the process procedures, saving the consumption of new hydrogen and reducing overall energy consumption.

Description

technical field [0001] The invention belongs to the fields of oil refining, petrochemical industry, and coal chemical industry, and relates to a new process for lightening residual oil / medium-low temperature coal tar, more specifically, a four-stage process for hydrogenation treatment, delayed coking, catalytic cracking, and PSA purification. A process for lightening residual oil / medium-low temperature coal tar by organically combining the above processes. Background technique [0002] Coke is a black or dark gray porous solid with metallic luster, the main component of which is carbocyanine. In recent years, due to the wide use of high-quality coke in metallurgy, non-ferrous metals, national defense, medical treatment, aerospace and atomic energy, the status of coke as a by-product of delayed coking has been changed; at the same time, higher requirements have been put forward for the quality of coke. [0003] Delayed coking process is simple, mature technology, low investm...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14
Inventor 张凤娇郑战利陈金樑崔保顺王楠芦霄然史锡才
Owner SINOPEC NANJING ENG & CONSTR
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