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.