Coal pyrolysis reactor

Abstract

The invention discloses a coal pyrolysis reactor, which comprises a pyrolysis reactor. An upper part of the pyrolysis reactor is provided with a raw material coal pipe for leading a coal raw material in and a leading-out pipeline for leading a coal pyrolysis gas-phase product out; the bottom of the pyrolysis reactor is provided with a discharging opening for leading a semi-coke out; a pipeline structure for leading a high temperature grain medium out is arranged in the pyrolysis reactor; and an outlet of the pipeline structure is extended to the middle part or the middle lower part of the pyrolysis reactor. The pyrolysis reactor is provided with the pipeline structure for shunting the high temperature grain medium, and the pipeline structure is extended to the middle part or the middle lower part of the pyrolysis reactor; and the raw material coal is pyrolyzed by adopting a combined method of indirectly pre-heating or directly heat exchanging, so that the use ratio of the heat energy is increased, the coal raw material on the upper part of the pyrolysis reactor plays a role in filtering dusts, and the structure reduces the content of the dust carried in the product to the largest extent.

Description

technical field [0001] The invention relates to the field of producing products such as coal tar, crude benzene, gas and semi-coke by pyrolysis of coal, in particular to a coal pyrolysis reactor. Background technique [0002] The process of thermally decomposing coal by using the sensible heat of solid heat carrier is an important coal thermal conversion method, especially when a stable solid heat source can be obtained, direct heat exchange between heat carrier particles and coal particles is used, which has a high heat transfer rate. Fast, high thermal efficiency, uniform heating and other advantages. [0003] In the past two decades, with the development of circulating fluidized bed boiler technology, researchers have paid more attention to the process of coal pyrolysis using the high temperature hot ash of circulating fluidized bed boiler. Ash is used as heat carrier to pyrolyze coal, and coal gas and tar are precipitated. Pyrolysis semi-coke and circulating ash are ret...

AI Technical Summary

Problems solved by technology

[0004] The Chinese utility model patent with the application number 200820033524.0 discloses "a single-bed self-heating pyrolysis gasification combustion reactor", which uses a partition plate to solve the technical problem of ash in the oil, but due to the particle size of the dust Generally less than 0.1mm, if the gap between the partition plates is too small, the pyrolysis reaction of coal will not be sufficient, and the reaction cannot be completed smoothly; if the gap between the partition plates is too large, the technical problem of ash in the oil cannot be solved

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