A vertical pulverized coal pyrolysis furnace

Abstract

The invention relates to a vertical type pulverized coal pyrolyzing furnace. The vertical type pulverized coal pyrolyzing furnace comprises a furnace body, wherein heat radiation pipes are mounted in the furnace body; the axial direction of each heat radiation pipe is the same as that of the furnace body; the heat radiation pipes are mounted on the inner wall of the furnace body; multiple heat radiation pipe groups are mounted on the inner wall of the furnace body and are circumferentially distributed in the furnace body; each heat radiation pipe group comprises a plurality of heat radiation pipes which are ]-shaped or [-shaped; the same heat radiation pipe groups are arranged in parallel on the same radial direction; along the direction pointing to the center of the furnace body, the axial length of the heat radiation pipes is gradually increased. According to the pyrolyzing furnace, the heat transfer area is greatly increased; by using the pyrolyzing furnace, the heat transfer area of an upright furnace with the same cross section is increased by 2-10 times, and the furnace output is fold increased; by utilizing pulverized coal pyrolysis, the gas can be smoothly guided, and is not easy to suffocate and convenient for production control; the pulverized coal or semi-coke is used as a heat source, so that the gas is saved, a gas additional value is increased, and the economic benefit is improved.

Description

technical field [0001] The invention relates to pulverized coal pyrolysis technology, in particular to a pulverized coal pyrolysis furnace. Background technique [0002] In the 1970s and 1980s, vertical furnaces were widely used to produce city gas and semi-coke. In recent years, with the development of low-rank coal utilization technology, vertical furnaces are often used for medium-low temperature pyrolysis of low-rank coal to produce semi-coke and gas, and extract coal tar from them. In the prior art, no matter it is the West German Coopers furnace type, the continuous vertical furnace type or the existing vertical semi-coke furnace type, in order to make the coal in the carbonization chamber have a certain degree of air permeability, only Using lump coal larger than 30mm as raw material, for pulverized coal with a diameter smaller than 6mm, the furnace pressure is too high due to the poor air permeability of the material layer, resulting in failure to produce. At the s...

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Problems solved by technology

[0004] Secondly, the heat transfer area of ​​the tank furnace is small, the pyrolysis speed is low, and the pulverized coal pyrolysis time is long. How to increase the heating surface and increase the output is the second problem faced by the vertical furnace pyrolysis pulverized coal

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