NOVELTY - The solid-fuel gasification system has thermal decomposition region (11) to which air is not supplied, char combustion zone (21), steam heating apparatus (3), dust removal apparatus (4) and combustion unit.    USE - For thermally decomposing solid-fuel and manufacturing synthesis gas containing carbon monoxide and hydrogen supplied to power generation equipment and hydrogen production installation.    ADVANTAGE - The solid-fuel gasification system generates synthesis gas of high calorific value, and inhibits the need of char recycle unit.    DETAILED DESCRIPTION - The solid-fuel gasification system has thermal decomposition region to which air is not supplied, char combustion zone, steam heating apparatus, dust removal apparatus and combustion unit. Char (F) from the thermal decomposition region is combusted in the presence of combustion air in the char combustion zone and a combustion gas is generated. Steam is heated by heat exchange with the combustion gas, in the steam heating apparatus. The combustion gas is purified by the dust removal apparatus which is provided between the char combustion zone and steam heating apparatus. The purified combustion gas from the dust removal apparatus is reheated by the combustion unit and sent to steam heating apparatus, and thus the temperature of the combustion gas is raised. The steam heating apparatus is equipped with heat exchanger which heats the steam to 600degreesC or more high temperature by heat exchange with the combustion gas. The high temperature steam (G) is supplied to the thermal decomposition region and the solid fuel (13) in the thermal decomposition region is thermally decomposed to generate thermal decomposition gas containing hydrogen and carbon monoxide as main components.    DESCRIPTION OF DRAWING(S) - The figure shows the block diagram of a heat-source structure of the solid-fuel gasification system. (Drawing includes non-English language text).    steam heating apparatus (3)    dust removal apparatus (4)    thermal decomposition region (11)    char combustion region (21)    solid-fuel (13)    char (F)    high temperature steam (G)