The present invention is to prevent the bottom of plugging the gasifier to prevent fouling (fouling) symptoms by inhibiting the adhesion of the recycle stream of the synthesis gas in the gasifier generates the particles and enhance the operation efficiency of the device, of good quality synthesis gas the gasifier at the same time increases the conversion efficiency can be obtained and, to a partial fusion of pulverized coal pulverized coal gasifier and gasification methods that can increase the refractory life.
According to the present invention, the gasifying unit; Pulverized coal burners which are provided on an upper part of the gasification feed unit; And it melts ash solidification prevention means is configured to prevent a solidification of the molten ash generated in the gasifying unit; there is provided a pulverized coal gasifier comprising a pulverized coal / oxidant input step to inject pulverized coal and an oxidizing agent into the gasifier; It injected oxidation step to oxidize the pulverized coal and an oxidizing agent; Induction melt comprising a molten ash components occurring in the oxidation process leads to a lower ash melting component to prevent coagulation is applied to the inner wall surface gasifier; There is provided a coal gasification process comprising the; and synthetic exhaust gas comprising: discharging the resulting synthesis gas from the gasifier interior.