INTEGRATED DRYING AND GASIFICATION PROCESS FOR SIMULTANEOUSLY PRODUCING SYNTHETIC GAS AND HIGH RANK COAL

摘要

The present invention relates to a gasification process for efficiently co-producing synthesis gas and high-grade coal from water-containing coal, and to an integrated drying and gasification system for realizing the same.

主权项

1. A gasification method of co-producing synthesis gas and high-quality coal, comprising the steps of:
a) supplying water-containing coal to a dryer; b) drying the water-containing coal in the dryer, in which thermal energy necessary for drying the water-containing coal is supplied in contact with synthesis gas recycled to the dryer from a gasification step; c) separating dried coal and synthesis gas discharged from the dryer using solid-gas separation and then recovering the separated synthesis gas; d) recovering a part of the separated dried coal and simultaneously transferring the residual separated dried coal to a gasifier in a fluidic state using a loop seal type transfer means to which aeration gas is supplied by a plurality of ports; e) gasifying the transferred dried coal in the gasifier to prepare synthesis gas; and f) directly recycling the synthesis gas of 400 to 1500□ discharged from the gasifier without passing the synthesis gas through a heat exchanger(s), wherein the dryer provides a drying capacity necessary for producing the dried coal separated and recovered from the water-containing coal and the dried coal transferred to the gasification step.