Highly efficient and clean gasification apparatus for carbonaceous dry powder and method thereof

摘要

A gasification apparatus for solid fuel, especially an apparatus for producing syngas by pressurized gasification of coal powder, is provided, which includes a gasification chamber (II) and a syngas cooling chamber (III). The inner wall of the gasification chamber is a water-cooled wall (4). The inner side of the water-cooled wall is uniformly coated with a layer of fireproof material (16). There is an annular cavity between the water-cooled wall and the furnace body. There are syngas cooling device, descending pipe (22), gas distribution device (24), defoaming device and dewatering and deashing device (21) in the syngas cooling chamber. Said syngas cooling device is connected with a conical tray at the bottom of the gasification chamber. The descending pipe (22) is connected with the syngas cooling device. The bottom of the descending pipe (22) is connected with the trumpet-shaped gas distribution device (24) by a smooth transition. Over the gas distribution device (24), there is provided a baffle device over which a defoaming device is arranged. The apparatus has a simple structure and can be easily operated. A high temperature gasification method for carbonaceous dry powder includes jetting flammable material and oxygen into the gasification furnace and followed by ignition.