Novel efficient high-ash coal gasification spiral reactor

The invention relates to a novel efficient high-ash coal gasification spiral reactor which comprises an ash collector, a feeding pipe is arranged at the upper part of the ash collector, a high-ash coal inlet and an active substance inlet are formed in the feeding pipe, and a high-temperature and high-pressure water inlet is further formed in the feeding pipe; a spiral reaction tank is arranged inthe ash collector, the upper end of the spiral reaction tank is in butt joint with a discharging port of the feeding pipe, the lower end of the spiral reaction tank extends out of the ash collector oris communicated with an outlet in the ash collector, and the spiral reaction tank is of a spiral sliding way structure with an arc-shaped cross section and a horizontally-formed tank opening. A slagoutlet is formed in the lower end of the ash collector. High-ash coal enters the feeding pipe; active substances are used for modification to improve the activity of the high-ash coal, semicoke with high ash content is thrown o