Gasifier of entrained-flow bed with single nozzle

The invention discloses a gasifier of an entrained-flow bed with a single nozzle. The gasifier is characterized by comprising a gasifier body, wherein a chilling conversion chamber is arranged below the gasifier body, and a washing deslagging chamber is arranged below the chilling conversion chamber. The gasifier body, the chilling conversion chamber and the washing deslagging chamber are coaxially arranged. The gasifier body is internally provided with a technical nozzle chamber. The chilling conversion chamber is internally provided with a chilling ring. The gasifier provided by the invention has the characteristics of easiness in amplified application in a large scale, stable and reliable operation, environmental friendliness, energy conservation and the like.