The invention provides method and equipment for gasifying
coal, relating to a
coal chemical industry technique and gasification furnace equipment. The invention is characterized in that a
fluidized bed gasification furnace is designed into a three-section working mode, the upper section is a suspended preheating section, the middle section is a turbulent flow pyrolyzing section, the lower section is a bubbled gasifying section, a
plasma torch is arranged at the bubbled gasifying section, and
water vapor is heated to be greater than 4000 DEG C in the
plasma torch, is decomposed into active chemicals H., O., H2., HO., O2. and then is directly sprayed to carbon
coke of the bubbled gasifying section for
chemical reaction to generate synthesis gas of CO and H2 and release heat; and
pyrolysis gas, the
water vapor and fluidized gas in the furnace are mixed, are discharged out of the furnace through an outlet of the suspended preheating section and then return the bubbled gasifying section of the gasification furnace through a fluidized air
pipe and a fluidized fan, and
soot, gaseous
tar, CmHn and CH4 in the
pyrolysis gas react with the
water vapor to generate the synthesis gas of the CO and the H2. Compared with the conventional
coal gasification technique, the invention reduces the consumption of coal resources and the
discharge of
greenhouse gases.