Low-rank coal anaerobic upgrading, grading and grading system

Abstract

The invention discloses a low-rank coal anaerobic upgrading, grading and grading system, and belongs to the technical field of raw coke oven gas production. The technical problem to be solved is to provide the low-rank coal oxygen-free upgrading, grading and grading system, low-rank coal is subjected to oxygen-free cracking to generate raw coke oven gas, the production cost is saved, and the production quality is improved. The adopted technical scheme is as follows: the system comprises a heat exchange furnace, a cooler, a rotary kiln, a raw coal preheater, a cyclone dust collector, a main fan, a desulfurizing tower, a raw coal conveyor and a carrier output fan. The heat of the high-temperature combustion gas is transferred to the raw coke oven gas carrier in a heat conduction manner; theraw coke oven gas carrier enters the rotary kiln in a closed oxygen-free environment and is subjected to cracking reaction with the low-rank coal to generate a large amount of raw coke oven gas, and the heat carrier is the same product and is doped with few impurities, so that the influence of burning coal impurities and air impurities on the product is avoided, the low-rank coal on the market isconsumed, and enterprise benefits are formed.

Description

technical field [0001] The low-rank coal anaerobic quality-grading and quality-separating system of the invention belongs to the technical field of raw gas production, and specifically relates to a complete system for generating raw gas by anaerobic cracking of low-rank coal. Background technique [0002] The direct combustion of low-rank coal is more polluting and has more impurities. In response to the national environmental protection policy in recent years, most production companies have not allowed the use of low-rank coal, so a large amount of low-rank coal resources have accumulated in the market. The clean gas used in the combustion of our company's production system needs to be purified from raw coal gas. In order to consider the production cost, we are committed to the use and development of low-rank coal production raw gas. In the past, low-rank coal was used to produce raw coal gas by anaerobic combustion. However, due to the low calorific value of low-rank coal ...

AI Technical Summary

Problems solved by technology

In the past, raw coal gas produced by using low-rank coal was mostly an oxygen-deficient combustion method, but due to the low calorific value of low-rank coal and too many impurities, the produced raw coal gas can only be burned once, and the internal elements are wasted

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