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A method for producing anthracite by pyrolysis of pulverized coal in rotary furnace with gas circulation

A technology for pyrolysis of anthracite and coal, used in coke ovens, indirect heating dry distillation, special forms of dry distillation, etc., which can solve the problems of poor utilization of heat and low system energy efficiency.

Active Publication Date: 2017-11-21
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat released during the blue coke quenching process of this method is also not well utilized, and the energy efficiency of the system is not high

Method used

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  • A method for producing anthracite by pyrolysis of pulverized coal in rotary furnace with gas circulation
  • A method for producing anthracite by pyrolysis of pulverized coal in rotary furnace with gas circulation
  • A method for producing anthracite by pyrolysis of pulverized coal in rotary furnace with gas circulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Send 2 tons of Shenfu pulverized coal (0-30mm) to the dedusting rotary drying furnace continuously, and the flue gas from the rotary pyrolysis furnace with a temperature of 600°C is introduced into the jacket as a heat source, and the dust is dedusted in the rotary drying furnace at the same time The clean flue gas (O 2 Content 3%) is used as dedusting gas. In the dedusting rotary drying furnace, the pulverized coal is heated to 250°C, and the water content after being treated is 0wt%. After dedusting, the pulverized coal enters the rotary pyrolysis furnace through the discharge valve for pyrolysis, producing high-temperature oil gas and anthracite: the anthracite enters the rotary cooling passivation furnace, recovers high-level heat and conducts medium-low temperature passivation, and then sends it to the spiral cooler Spray water to further cool and humidify, and the humidified anthracite (H 2 O content 7wt%) sends out as the product. The high-temperature oil and ...

Embodiment 2

[0087] 6 tons of Shenfu pulverized coal (0-30mm) are continuously sent to the dedusting rotary drying furnace, and the clean flue gas (O 2 Content 2%) as dust removal gas and heat source. In the dedusting rotary drying furnace, the pulverized coal is heated to 200°C, and the water content after treatment is 1.5wt%. The pulverized coal after dust removal enters the rotary pyrolysis furnace through the discharge valve for pyrolysis to produce high-temperature oil gas and anthracite: the anthracite enters the rotary cooling passivation furnace, recovers high-level heat and passivates, and sends it to the spiral cooler for further cooling by spraying water , humidification, humidified anthracite (H 2 O content 7wt%) sends out as the product. The high-temperature oil and gas enter the oil and gas recovery system, and perform unit operations such as dust removal, cooling, and separation to obtain coal tar, pyrolysis gas and pyrolysis water; among them, part of the pyrolysis gas is...

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Abstract

The invention provides a method for pyrolysis production of anthracite in a coal powder rotary furnace. The method relates to a coal powder dust removing rotary drying furnace system, an external-heating rotary furnace pyrolysis system with a coal gas circulation function, a rotary cooling passivation system with a heat recovery function, and an oil gas recovering system, wherein the coal powder dust removing rotary drying furnace system is used for heating coal powder to 110 to 280 DEG C and removing coal dust of which the particle size is smaller than 0.2 mm; drying water is recovered and fed to a downstream spiral cooling machine to be used for anthracite cooling and humidification; the coal dust obtained after separation is fed to a coal gas generating system to generate fuel, namely coal gas; after dust removing, coal is sent to a downstream rotary pyrolysis system for pyrolysis; high-temperature anthracite is generated, and cooled; the cooled anthracite is passivated at a middle-low temperature; the passivated anthracite is cooled in the spiral cooling machine; water is sprayed on the cooled passivated anthracite for humidification; the humidified anthracite is sent out; high-temperature oil gas produced in the process enters the oil gas recovering system to obtain coal tar, pyrolyzed water and coal gas. Part of the produced pyrolyzed coal gas returns to the pyrolysis furnace after preheating in a circulating manner, while the other part of the produced pyrolyzed coal gas is sent out.

Description

technical field [0001] The invention relates to a new process technology for producing anthracite by pyrolysis of industrialized low-rank pulverized coal, in particular to an industrial technology and equipment for pyrolysis upgrading of low-rank pulverized coal by using a rotary furnace, belonging to a new type of coal chemical industry technology field. Background technique [0002] my country is rich in coal resources, among which low-rank coal accounts for more than 50% of my country's total coal. However, low-rank coal usually has the characteristics of high oxygen content, high moisture, poor stability, and low calorific value. Therefore, this type of coal is difficult to be used as a raw material for large-scale industrial gasification, and more is only used as a power fuel in local areas. Through the pyrolysis and upgrading of low-rank coal, its pore structure can be changed to a large extent, its moisture and volatile content can be reduced, its calorific value and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B47/30
CPCC10B47/30C10B53/04
Inventor 王守峰山秀丽常景泉贺鑫平李万飞王淑岩李锦涛吴莹莹吕子胜刘艳军李万善
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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