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System and method for pyrolyzing coal

A technology for pyrolysis and pyrolysis reactors, which is applied in special forms of dry distillation, petroleum industry, coke ovens, etc. It can solve the problems of difficult comprehensive utilization, easy dusting and flammability of pulverized coal, and achieve less secondary reactions and lighter weight. The effect of high content of qualitative components and high quality of tar

Active Publication Date: 2016-05-11
SHENWU TECH GRP CO LTD
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Problems solved by technology

Pulverized coal has problems such as dust, flammability, and explosion, and it is difficult to comprehensively utilize it.

Method used

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  • System and method for pyrolyzing coal
  • System and method for pyrolyzing coal

Examples

Experimental program
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Embodiment

[0126] use Figure 1-5 The pyrolysis coal system processes lignite, the industrial analysis of lignite: Mad%: 6.75%, Vad%: 31.59%, Aad%: 5.41%, Fcad%: 56.25%.

[0127] Process parameters: The temperature of the drying and dehydration zone in the moving bed pyrolysis reactor is 580°C, the temperature of the pyrolysis reaction zone is 605°C, the temperature of the semi-coke maturation zone is 594°C, the outlet temperature of the second cyclone separator 1100 is 565°C, and the heat storage type The internal pressure of the radiant tube reactor is 2.51Kpa.

[0128] Distribution of pyrolysis tertiary products: tar 17.4%, pyrolysis gas 12.8%, semi-coke 69.8%.

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Abstract

The invention discloses a system and method for pyrolyzing coal. The system comprises a moving bed pyrolysis reactor and a spray tower; the reactor comprises a coal material inlet, a semicoke outlet, regenerative radiant tubes, oil gas exporting pipelines, a stirring device and gas collecting tubes; the regenerative radiant tubes are arranged in the reactor in the height direction of the reactor for multiple layers, and multiple regenerative radiant tubes which are parallel to one another in the horizontal direction are arranged on each layer; through holes are formed in the pipe walls of the oil gas exporting pipelines; the stirring device comprises a stirring shaft and multiple stirring rods connected to the stirring shaft; the gas collecting tubes comprise the gas collecting header tube and the gas collecting branch tubes, and the gas collecting header tube is connected with the spray tower. According to the system, powdered coal can be effectively treated, and the treatment efficiency is high; meanwhile, oil gas resources generated through pyrolysis can be quickly exported, secondary reactions are few, the tar oil quality is high, and the content of light components in tar oil is high; in addition, due to the fact that the regenerative radiant tubes are adopted in the pyrolysis reactor and rotatable inner elements are arranged in the regenerative radiant tubes, heat transfer among particles and between the particles and the radiant tubes is increased, and the heat transfer efficiency is high.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular, the invention relates to a system and method for pyrolyzing coal. Background technique [0002] my country's energy structure is characterized by rich coal, poor oil, and little gas. As the world's largest coal producer and consumer, coal resources will remain unshakable as my country's leading energy source for a long period of time. According to statistics, my country's proven coal reserves are 114.5 billion tons, of which medium and low-rank coal (lignite, low-modified bituminous coal) account for about 55.15% of the country's retained resources. Because low-rank coal has the characteristics of high moisture content, easy weathering, difficulty in sorting, and unsuitable for long-distance transportation and storage, its comprehensive utilization is greatly restricted. Among them, direct combustion power generation is one of the most common utilization methods. According to inco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/00
CPCC10B53/04C10B57/00
Inventor 梅磊陈水渺姜朝兴薛逊吴道洪
Owner SHENWU TECH GRP CO LTD
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