Coal full-grain size grading pyrolysis and active coke preparation coupling process and system in coal gas circulating

A technology of graded pyrolysis and preparation process, applied in the field of coal chemical industry, can solve the problems of high powder content of pyrolysis gas, large water consumption, large pollutant discharge, etc., so as to improve tar recovery rate, reduce production cost, and improve tar quality effect

CN104164244AInactive Publication Date: 2014-11-26BEIJING QIANHAI ENVIRONMENTAL PROTECTION TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-11-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a coal full-grain size grading pyrolysis and active coke preparation coupling process and system in coal gas circulating. The process comprises the following steps: dividing raw coal into slack coal and pea coal through a raw coal preheating and grading system and drying the raw coal by utilizing high temperature flue gas discharged by a coal gas heating furnace; with the obtained steam-containing tail gas as an activating agent and pyrolysis coal gas generated by the coal gas heating furnace per se as an activating agent heating flue, enabling the obtained high temperature activating agent to be in direct contact with high temperature semicoke from a slack coal pyrolyzing furnace and a pea coal pyrolyzing furnace to activate the semicoke. The process provided by the invention has the advantages that raw coal pyrolysis is coupled with active coke preparation and the coal gas generated by the pyrolysis is utilized to serve as the energy of active coke activation, so that the production cost is low; water carried by the raw coal per se serves as the source of a steam activating agent, so that water is saved in the production process; the high temperature semicoke from the pyrolyzing furnaces is in direct contact with the high temperature activating agent to be activated and the sensible heat of the high temperature semicoke is utilized, so that the production energy consumption is low; gas containing combustible components generated by activation serves as the compensatory fuel of the pyrolysis, so that the energy recycling efficiency is high.
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Description

Technical field

[0001] The invention relates to the technical field of coal chemical industry, in particular to a process and system for preparing coal gas circulating coal full particle size classification pyrolysis coupled activated coke.

[0002] Background technique

[0003] Activated coke is an activated carbon adsorption material with a relatively developed pore structure and a large specific surface area produced by a special production process with coal as the main raw material. It has the characteristics of strong adsorption capacity and good chemical stability, and is widely used. In the field of environmental treatment such as sewage treatment, flue gas desulfurization and denitrification.

[0004] Activated coke and activated carbon are both carbonaceous materials with special adsorption functions, but the most obvious advantage of activated coke over activated carbon is its low price. At present, the traditional method for preparing coal gas circulating coal full parti...

Examples

Embodiment Construction

[0044] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] Such as figure 2 As shown, the gas cycle coal full particle size classification pyrolysis coupled activated coke preparation system of the present invention includes: raw coal preheating classification system 100, granular coal pyrolysis furnace 200, semi-coke activation furnace 300, fine coal pyrolysis furnace 400, activator A heating furnace 500, a pyrolysis gas processing system 600, and a gas heating furnace 700. The raw coal preheating classification system 100 further includes a dust collector 110 and a desulfurization device 120, and the pyrolysis gas processing system 600 includes a fine dust collector 610 and a gas cooling device 620.

[0046] The raw coal preheating and grading system 100 uses raw coal as a raw material and is provided with three outlets for fine coal, granular coal and low-temperature dry gas. The outlet of the ...