A coal pyrolysis method that comprehensively utilizes coal pyrolysis products and heat
A technology of coal pyrolysis and heat, applied in the field of coal pyrolysis, can solve the problems of high cost, difficult recycling industry, low enrichment degree, etc., and achieve the effect of reducing investment cost, improving comprehensive economic benefits, and reducing investment
Active Publication Date: 2020-06-23
INNER MONGOLIA UNIVERSITY
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Problems solved by technology
However, since the enrichment of each component in coal tar is very low, and there are almost no components with a content of more than 1%, it is very difficult and costly to recover these products industrially.
Method used
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Embodiment 1
[0031] Embodiment 1: technical process such as figure 2 shown.
[0032] (1) Firstly, the coal used for high-temperature coking, such as gas coal, coking coal, lean coal, fat coal and a small part of low-rank coal, is blended according to the conventional ratio to prepare the blended coal raw material for high-temperature pyrolysis;
[0033](2) Put the prepared raw coal into the carbonization chamber of the high-temperature coking oven at room temperature; at the same time, put the medium-low temperature pyrolysis gas and air (about 1000°C) produced by pyrolysis and undergoing detarring and heat exchange treatment It is introduced into the combustion chamber of the high-temperature coke oven together, ignites the medium and low-temperature pyrolysis gas, and transfers the heat generated by the combustion to the coal in the carbonization chamber, so that the coal is heated by the heat flow from the furnace wall and the furnace bottom under the condition of isolating the air. D...
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The invention discloses a coal pyrolysis method comprehensively using coal pyrolysis products and heat. Hydrogen-rich coke oven gas and flue gas generated by high-temperature pyrolysis are used as a hydrogen source and a heat source for medium-and low-temperature pyrolysis of coal; a part of gas generated by the medium-and low-temperature pyrolysis is preheated by high-temperature red coke to formheating raw gas for the high-temperature pyrolysis process; and the remaining part is used for hydrogen production, and is used as a hydrogen source for pyrolysis tarhydro-treatment to produce high value-added oil. The optimized combination process is simple, and can save a regenerator, a ramp and other devices in a high-temperature coke oven, save a heating device in the medium-and low-temperature coking process, and reduce the investment cost; the method can reasonably utilize various kinds of sensible heat generated by the high-temperature coke oven, so as to improve the energy efficiencyof the whole pyrolysis process; and the whole system realizes hydrogen source self-feed, comprehensively uses the heat, and is of great significance for reasonable utilization of various coal resources in China.
Description
technical field [0001] The invention belongs to the technical field of coal pyrolysis, and relates to a pyrolysis process that combines high-temperature pyrolysis of coal with medium-low temperature pyrolysis of coal, and comprehensively utilizes coal pyrolysis products (coke oven gas, tar) and heat, and by-product tar A method for hydrogenation to produce high value-added oil products. Background technique [0002] Coal is an important energy base and chemical raw material in my country, providing an important support for national economic development and social stability. Coal is also the most abundant energy resource in my country, accounting for about 94% of the total proven fossil energy resources in my country. It is the most abundant and basic energy resource in China. Compared with other energy resources, coal is also the most economical energy resource in my country. In 2017, my country's coal consumption was 3.5 billion tons, and it is predicted that by 2020, the...
Claims
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IPC IPC(8): C10B53/00C10B57/00C10B57/16C10B57/14C10G1/00
CPCC10B53/00C10B57/00C10B57/14C10B57/16C10G1/002
Inventor 郝海刚张军宫聚辉高瑞
Owner INNER MONGOLIA UNIVERSITY