The invention provides a gasification furnace and a hydrogasification method for
coal to overcome the problem of waste of energy in re-gasification of semi-
coke during hydrogasification of
coal, belonging to the technical field of
coal gasification. The gasification furnace comprises a furnace body, a
coal dust nozzle, a
hydrogen-containing gas
nozzle, an inner reaction cylinder with an open top and a gasification agent inlet, wherein the
coal dust nozzle and the
hydrogen-containing gas nozzle are both installed at the bottom of the furnace body, the inner reaction cylinder is arranged at the lower part in the furnace body, the
coal dust nozzle and the
hydrogen-containing gas nozzle are communicated with the interior of the inner reaction cylinder, the inner reaction cylinder is used for hydrogasification of coal to produce crude gas and semi-
coke, the gasification agent inlet is communicated with the bottom of an annular space located between the inner reaction cylinder and the furnace body, and the gas velocity of a gasification agent introduced via the gasification agent inlet enables the semi-
coke to fall into the annular space and to undergo gasification reaction with the gasification agent again so as to produce crude gas. The gasification furnace and the hydrogasification method for coal provided by the invention are used for hydrogasification of coal and graded conversion of low-rank coal.