System and process for producing active carbon by virtue of coal gasification and pyrolysis

Abstract

The invention discloses a system and process for producing active carbon by virtue of coal gasification and pyrolysis, and provides a coal base poly-generation process technology. The main body part of the system comprises three process units for coal pyrolysis, coal gasification and active carbon preparation as well as a first steam generator and a second steam generator, wherein the high-temperature gasification gas generated by the coal gasification unit is sequentially used as a heat carrier for the first steam generator and the coal pyrolysis unit, and the carbocoal generated by the coal pyrolysis unit is used as a carbon source for the active carbon preparation unit and a fuel for a main body heat source; and the first steam generator provides steam as a gasification agent (or oxidant) for the coal gasification unit, the steam generated by the second steam generator serves as part of an activator of the active carbon preparation unit, and the high-temperature tail gas generated by the active carbon preparation unit serves as a heat source of the second steam generator. By adopting the system and the process disclosed by the invention, the problem that the conventional pyrolysis process cannot effectively use pyrolysis carbocoal is solved, and a co-production technical route of three coal base products including active carbon, coal gas and tar is realized.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a coal gasification and pyrolysis combined production activated carbon system and process. Background technique [0002] The energy situation of "rich in coal, poor in oil, and low in gas" determines that my country will continue to use coal as the main body of energy consumption for a long time in the future. Coal pyrolysis is a clean and efficient utilization of coal resources, and one of the effective ways to develop high value-added coal chemical industry. [0003] Many countries are developing and researching their own characteristic coal pyrolysis technology. However, the utilization of coal pyrolysis semi-coke has always been a major problem that plagues and restricts the rapid coal pyrolysis process, which is mainly reflected in the following aspects: ( 1) The volatile content of the semi-coke is low, resulting in a decrease in the reactivity of the semi...

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Problems solved by technology

[0004] The invention proposes a coal gasification and pyrolysis combined production activated carbon system and process, which organically combines three process units of coal gasification, coal pyrolysis and coal pyrolysis semi-coke to prepare activated carbon, and solves the problem that the traditional pyrolysis process cannot effectively use heat Solve the problem of semi-coke, and further realize the co-production technology route of activated carbon, gas and tar three coal-based products

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