Low-temperature pyrolysis device for coal

Abstract

A low-temperature pyrolysis device for coal is characterized by comprising a feeder, a reactor, a dust remover and a separating tower according to the reaction sequence, wherein the feeder is used for providing raw coal for the reactor; the reactor is used for conducting pyrolysis on the raw coal; the dust remover is used for conducting dust removing treatment on volatile substances generated during the pyrolysis of the reactor, and is heated all the time during the working process; and the separating tower is used for separating the volatile substances treated with dust removing. The low-temperature pyrolysis device has the advantages that pipeline blockage can be reduced, so as to ensure stable and efficient low-temperature pyrolysis for the coal; and as the comparatively purer volatile substances treated by the dust remover are prevented from being heated again, the purposes of energy conservation, environmental protection and very high efficiency are realized.

Description

technical field [0001] The invention belongs to the technical field of coal heating cracking, and in particular relates to a coal low-temperature pyrolysis device. Background technique [0002] Coal thermal cracking (coal dry distillation, coal pyrolysis) is one of the important processes of coal chemical industry. It refers to the process in which coal is heated and decomposed under air-isolated conditions to produce coke (or semi-coke), coal tar, crude benzene, gas and other products. According to the difference in the final heating temperature, it can be divided into three types: 900-1100°C is high-temperature pyrolysis (high-temperature dry distillation), that is, coking; 700-900°C is medium-temperature pyrolysis; 500-600°C is low-temperature pyrolysis. [0003] At present, the low-temperature pyrolysis of coal generally adopts the internal heat method of solid heat carrier. The method firstly mixes the preheated small pieces of raw coal with the catalyst in the feeder...

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Problems solved by technology

[0007] In order to solve the problem that the existing coal low-temperature pyrolysis device is prone to pipeline blockage and low production efficiency, the present invention provides a low-temperature coal pyrolysis device that does not require secondary heating, is energy-saving and environmentally friendly, is not prone to pipeline blockage, and has high production efficiency.

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