The invention relates to a method of destroying and vaporizing refuse, primarily household waste. The material is fed into a shaft furnace, in which the material is subjected to a vaporization and combustion process in at least three zones, said zones being produced by the supply of blast air at least at three different levels in the shaft furnace which blast gas completely or partly is supplied with controlled quantities of thermal energy by means of electricity, preferably by using at least one plasma generator. The gas produced by the process is withdrawn through an annular drum, arranged about two thirds of the way up the shaft furnace. The gas leaving can be used as combustion gas e.g. for district heating plants and steam power stations with varying thermal requirements.
展开▼
