Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process technology for non-caking coal or weak caking coal

A technology of weak caking coal and processing technology, applied in the field of coal chemical industry, to achieve the effect of improving utilization rate, improving raw material utilization rate and protecting equipment

Inactive Publication Date: 2009-11-18
CHINA COAL ENERGY HEILONGJIANG COAL CHEM +1
View PDF0 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, for non-caking or weakly caking coals such as lignite, long-flame coal, and gas coal, there is still a lack of a processing technology that can make good use of non-caking or weakly caking coals.

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
  • Process technology for non-caking coal or weak caking coal
  • Process technology for non-caking coal or weak caking coal
  • Process technology for non-caking coal or weak caking coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The Nanning lignite is sent to a fluidized bed dry distillation reactor for dry distillation reaction at a pressure of 0.1 MPa and an operating temperature of 500° C. to produce coal gas, coal tar and semi-coke. The properties of coal tar are shown in Table 1. After purification, the coal gas enters the pressure swing adsorption device, passes through the adsorption bed composed of zeolite molecular sieve, etc., and the operating pressure is 2MPa. The hydrogen in it is extracted, and the carbon monoxide component is also produced by reacting with water by the medium-shift technology. In addition to hydrogen, the pressure swing adsorption technology is used together with the hydrogen produced by coal retort to propose the feed for the coal tar hydrocracking unit. The semi-coke is sent to the fluidized bed coal gas generator, where it reacts with oxygen and water vapor to produce syngas and coal ash. During the gasification of semi-coke, the semi-coke reacts with oxygen and wat...

Embodiment 2

[0073] The ylang coal is sent to a medium fluidized bed dry distillation reactor for dry distillation reaction, the pressure is 0.12MPa, the operating temperature is 600°C, and coal gas, coal tar and semi-coke are generated. The properties of coal tar are shown in Table 2. After the dry distillation gas is purified, it enters the pressure swing adsorption device, passes through the adsorption bed composed of silica gel, etc., the operating pressure is 2.45MPa, and the hydrogen in it is extracted, and the carbon monoxide component in it is also reacted with water by the medium change technology. Hydrogen is generated, and the pressure swing adsorption technology is used together with the hydrogen produced by coal retorting to propose the feed for the coal tar hydrogenation unit. The semi-coke is sent to the fluidized bed coal gas generator, where it reacts with oxygen and water vapor to produce syngas and coal ash. During semi-coke gasification, semi-coke reacts with oxygen and wat...

Embodiment 3

[0077] The ylang-ylang lignite is fed into a fluidized bed dry distillation reactor for dry distillation at a pressure of 0.18MPa and an operating temperature of 650°C to generate dry distillation gas, coal tar and semi-coke. The properties of dry distillation coal tar are shown in Table 3. After the dry distillation gas is purified, it enters the pressure swing adsorption device, passes through an adsorption bed composed of carbon monoxide adsorbent, etc., with an operating pressure of 1.2MPa, and the hydrogen in it is extracted for the feed of the coal tar hydrogenation device. The semi-coke is sent to the fluidized bed coal gas generator, where it reacts with oxygen and water vapor to produce syngas and coal ash. During the gasification of semi-coke, the semi-coke reacts with oxygen and water vapor (the volume ratio of water vapor and oxygen is 5:1) to produce synthesis gas (carbon monoxide and hydrogen) and coal ash; the reaction pressure of the gas generator is 1.6MPa, and th...

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 process technology for non-caking coal or weak caking coal, which comprises the following steps: firstly non-caking coal or weak caking coal is carbonized at low-and-medium temperature to generate semicoke, coal gas and coal tar; then the three carbonization products are respectively processed: first, the semicoke is gasified into synthesis gas which is then subjected to Fischer-Tropsch synthesis to prepare paraffin hydrocarbons; second, the hydrogen in the coal gas is extracted by using the pressure varying adsorption technology; and third, the coal tar is fractionated to obtain phenolated oil, tower top oil and tower bottom oil, the phenolated oil is extracted to obtain phenols and dephenolized oil, the tower bottom heavy oil and the dephenolized oil are subjected to delayed coking to obtain coking gas, coking naphtha, coking diesel fuel, coking wax oil and coke; and then the extracted hydrogen is used to conduct hydrotreatment on the paraffin hydrocarbons, coking naphtha, coking diesel fuel and coking wax oil; finally the hydrogenation products respectively obtained are mixed.

Description

Technical field [0001] The invention relates to a coal processing technology, in particular to a processing technology of non-caking coal or weakly-caking coal, and belongs to the field of coal chemical industry. Background technique [0002] Non-caking coal or weakly caking coal includes lignite, long-flame coal and gas coal. Lignite is the coal with the lowest degree of coalification. It has high moisture, low specific gravity, high volatile content, non-bonding, strong chemical reactivity, poor thermal stability, low calorific value, and contains varying amounts of humic acid. It is mostly used as fuel. The raw material for gasification can also be used to extract montan wax and humic acid to produce sulfonated coal or activated carbon. The long-flame coal also has a high volatile content, has no or only small cohesiveness, is easy to burn, and has a long flame when it burns, hence the name long-flame coal. Long flame coal can be used as a raw material for gasification, as wel...

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): C10B53/04C10J3/66C10K1/32C10G2/00C10G7/00C10G69/06C10G67/02
CPCY02E20/18
Inventor 姜殿臣秦利彬沈和平赵长林韩雪冬杨承强李增文
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com