Carbonization process of high-volatilize content coal

Abstract

The invention relates to a carbonization process of high volatile coal, a direct heating process that heats and distills high volatile coal by using high temperature cycle gas in a shaft furnace as a carrier. Lump coal that moves up and down in the shaft furnace is heated by rising hot gas and the discharged volatiles form char; the char is cooled by cold gas that is introduced by the furnace bottom from the lower part of a furnace and then discharged outside the furnace; the rising gas is introduced outside finally by the furnace top, washed, purified and cooled; one part is taken as a cycle cooling medium, one part is taken as a cycle heat carrier after being per-heated and the rest is taken as a gas external supply and the calorific value is equal to that of a coke oven gas.

Description

Technical field: [0001] The invention belongs to the field of dry distillation production of coal, and belongs to a direct heating process for heating dry distillation of high-volatile coal with high-temperature circulating gas as a carrier. Background technique: [0002] The dry distillation process of coal is a process of converting high-volatile coal, such as lignite and other young coals, into semi-coke, and at the same time can obtain by-products such as tar and gas. The traditional dry distillation process uses indirect heating to ensure that the coal will not be burned. , there is also a direct heating method using a solid heat carrier, but the equipment is more complicated and has low efficiency and high investment. However, a large number of domestic dry distillation uses simple direct heating, which is not only inefficient, but also gas and tar cannot be recovered, especially polluted environment. [0003] The present invention adopts shaft furnace circulating hig...

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Problems solved by technology

[0004] In order to overcome the indirect heating of the traditional dry distillation process which makes the equipment complicated, the present invention adopts a direct heating process with high-temperature circulating gas as the carrier, and the counter-flow heat of the shaft furnace adopted has the advantage of high efficiency, and the equipment structure is simpler than the traditional dry distillation , thus saving investment

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