Method for coal hydrogenation pyrolysis and gasification coupling
A technology for coal hydrogenation and pyrolysis of coal gas, which is applied in gasification process, combustible gas purification, direct heating and dry distillation, etc., can solve the problems of low tar yield, single synthesis gas component, and inability to extract naphthalene coal chemical products, etc. Achieve the effect of improving tar yield and light component content
Active Publication Date: 2013-01-09
北京锦泰诚瑞科技发展有限公司
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Problems solved by technology
[0003] In the existing technology, the tar yield of coal pyrolysis technology is low, and the content of light components is small; the rapid hydropyrolysis technology of coal can increase the tar yield and obtain methane-rich high calorific value gas at the same time, but the raw coal Some carbon still exists in the form of low-value-added semi-coke, and the total carbon utilization rate of raw materials is low
Coal gasification technology can obtain syngas with different gas components by selecting different gasification agents, but as far as the specific gasification medium is concerned, its syngas components are relatively single, and at the same time, it is impossible to extract naphthalene, benzene, phenol, etc. valuable coal chemical products
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[0025] Taking the production scale of coal processing capacity of 2t / h as an example, the industrial analysis before and after the upgrading of raw coal is shown in Table 1. After the raw coal with an average particle size of 0.6mm is dried and preheated in the coal drying preheating system (1), the preheating temperature is 270°C, and 60% of the raw coal first enters the coal hydro-pyrolysis furnace (2), and then Under the conditions of pressure 1.0MPa and temperature 600°C, hydropyrolysis is carried out, and the pyrolysis gas phase product enters the pyrolysis gas purification and separation system (5) for purification and separation, wherein the yield of pyrolysis gas is 19.68% (52% containing methane gas), tar The yield is 14.63%, and the yield of naphthalene, benzene, phenol, etc. is 4%. The solid product semi-coke all enters the coke hydrogenation gasification furnace (3), and is hydrogenated and gasified under the conditions of pressure 1.0 and temperature 327 ° C, and t...
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Abstract
A preparation method of coal hydropyrolysis and gasification coupling with high utilizing rate of total carbon of raw material and system thereof are provided. The method comprises the following steps: A, drying and preheating raw material coal with granularity less than or equal to 2mm in a coal drying and preheating system (1); B, After drying and preheating, putting 60-80% of raw coal into coal hydropyrolysis furnace (2) to carry out hydropyrolysis reaction, then the pyrolyzed gas phase product was purified and separated; C, putting all the semicoke generated by the coal hydropyrolysis furnace in a coke hydrogasification furnace to carry out hydrogasification, then gasification gas phase product was purified and separated; D, After drying and preheating, putting 20-40% of raw coal and high temperature coke particle from coal hydropyrolysis furnace into hydrogen-rich reactor (4) under interaction of mixed gasification agent of oxygen and water vapor to carry out gasification reaction. The generated hydrogen-rich gas is used as fluidized reaction gas of coal hydropyrolysis furnace.
Description
technical field [0001] The invention relates to a comprehensive utilization technology of coal resources, in particular to a method for coupling coal hydropyrolysis and gasification. Background technique [0002] In the 21st century, with the rapid economic growth, the demand for chemical raw materials has also increased sharply. In the structure of chemical raw materials, coal accounts for more than half. consensus. In order to realize the graded and efficient utilization of coal resources, the academic community has proposed a process idea of "coal topping", which fully extracts gases, liquid fuels and fine chemicals from coal. [0003] In the existing technology, the tar yield of coal pyrolysis technology is low, and the content of light components is small; the rapid hydropyrolysis technology of coal can increase the tar yield and obtain methane-rich high calorific value gas at the same time, but the raw coal Some of the carbon still exists in the form of low-value-a...
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IPC IPC(8): C10B53/04C10B49/10C10B57/10C10K1/00C10G1/06C10J3/46
CPCC10J2300/093C10J3/62C10B49/10C10B53/04C10J3/463
Inventor 吴道洪王五一王其成
Owner 北京锦泰诚瑞科技发展有限公司