Coal gasification system, coal gasification method and solid chiller

The invention discloses a coal gasification system, a coal gasification method and a solid chiller, relating to the technical field of coal gasification. The problem that the coal gasification system is low in service performance is solved. The coal gasification system comprises a gasifier with an inner barrel, wherein a solid chiller is arranged on the lower part in the inner barrel; the solid chiller comprises an annular pipe with a feeding hole and a discharge opening; and solid materials enter the annular pipe from the feeding hole of the annular pipe and enter the inner barrel from the discharge opening of the annular pipe, so that raw gas in the inner barrel is cooled. The coal gasification system provided by the invention is used for improving the service performance of the coal gasification system.