Method for producing clean diesel oil through coal tar hydrogenation, and system for method

A technology for coal tar and diesel oil, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of instability, long-term stable operation and blockage of the slurry bed hydrogenation device, and achieve good product quality. , realize clean and efficient utilization, and improve the effect of liquid yield

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the defects in the existing method of processing coal tar that are easy to coke to generate coke or deposit down to block the internal components of the reactor, resulting in the slurry bed hydrogenation unit not being able to run stably for a long period of time, and to provide a Novel method for hydrogenation of coal tar to produce clean diesel and system for...

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
  • Method for producing clean diesel oil through coal tar hydrogenation, and system for method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Based on the total weight of the coal tar raw material, the dosage of the slurry bed catalyst is 1.5% by weight based on the active metal elements contained therein. After mixing the coal tar raw material in Table 1 with the aforementioned highly dispersed heterogeneous slurry bed catalyst, they enter the slurry bed hydrogenation reactor together with hydrogen for gentle hydrogenation treatment, and the outflow of the slurry bed hydrogenation reactor The product enters the first separation unit for gas-liquid separation, and separates water, and the separated liquid hydrocarbon product enters the first fractionation tower, and is distilled and cut into light distillate, middle distillate and heavy distillate. Wherein the first fractionation tower distills and cuts 7.5% by weight of the heavy fraction out of the device; the remaining heavy fraction is circulated back to the slurry bed hydrogenation reactor for further conversion.

[0117] The raw material of anthracene o...

Embodiment 2

[0122] Present embodiment adopts the similar processing route with embodiment 1 to carry out, and what is not used is:

[0123] In embodiment 2, based on the total weight of coal tar raw material, the consumption of slurry bed catalyst is 2.0% by weight in terms of the active metal elements contained therein; the heavy fraction of 10% by weight cut out by the first separation unit out device to control the solid content in the slurry bed reactor and maintain the activity of the catalyst in the slurry bed reactor is stable, and the rest of the heavy fractions are recycled back to the slurry bed hydrogenation reactor for further conversion; the weight of the anthracene oil raw material is related to the The ratio of the weight sum of the light distillate and the middle distillate is 0.25:1; the first diesel fraction recycled back to the slurry bed hydrogenation reactor accounts for the first diesel fraction cut out by distillation in the second separation unit 35% of the total w...

Embodiment 3

[0128] Present embodiment adopts the similar processing route with embodiment 1 to carry out, and what is not used is:

[0129] In embodiment 3, based on the total weight of coal tar raw material, the consumption of slurry bed catalyst is 1.0% by weight in terms of active metal elements contained therein; the heavy fraction of 5% by weight cut out by the first separation unit out device to control the solid content in the slurry bed reactor and maintain the activity of the catalyst in the slurry bed reactor is stable, and the rest of the heavy fractions are recycled back to the slurry bed hydrogenation reactor for further conversion; the weight of the anthracene oil raw material is related to the The ratio of the weight sum of the light distillate and the middle distillate is 0.15:1; the first diesel fraction recycled back to the slurry bed hydrogenation reactor accounts for the first diesel fraction cut out by distillation in the second separation unit 25% of the total weight...

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 present invention relates to the field of coal tar processing, and discloses a method for producing clean diesel oil through coal tar hydrogenation, and a system for the method. The method comprises: introducing a coal tar raw material into a pretreatment unit; introducing the obtained material into a slurry bed hydrogenation reactor; sequentially carrying out separation and fractionation on the obtained material to obtain a light distillate, a middle distillate and a heavy distillate; throwing out part of the heavy distillate; introducing an anthracene oil raw material, the middle distillate and the light distillate into a refining reactor; recycling the remaining heavy distillate back to the slurry bed hydrogenation reactor; sequentially carrying out separation and fractionation on the effluent from the refining reactor; recycling part of a first diesel oil distillate back to the slurry bed hydrogenation reactor; and introducing the remaining first diesel oil distillate into a hydrogenation modification reactor. With the method of the invention, the yield of the liquid can be maximized, the utilization ratio and the utilization value of coal tar resources are improved, and the operation cycle of the equipment is prolonged.

Description

technical field [0001] The invention relates to the field of coal tar processing, in particular to a method for producing clean diesel oil through hydrogenation of coal tar and a system for producing clean diesel oil through hydrogenation of coal tar. Background technique [0002] With the sustained and rapid development of social economy, my country's demand for petroleum products is also increasing. [0003] However, petroleum is a non-renewable energy source and is facing a crisis of depletion. In contrast, China has relatively abundant coal reserves, so producing liquid fuel from coal has become a basic direction of coal processing and utilization. [0004] With the rapid development of the domestic coal chemical industry, especially the modern coal chemical industry, the output of coal tar is increasing, and the clean processing and effective utilization of coal tar are becoming more and more important. At present, the conventional coal processing method is to cut var...

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): C10G67/02
Inventor 李猛王蕴王卫平吴昊黄放
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