Method of combustion or gasification in a circulating fluidized bed

A method of combusting or gasifying material containing combustible components in a circulating fluidized bed which has a turbulence chamber for the combustion or gasification, a solids separator connected with the upper region of the turbulence chamber, a recycle from the solids separator of settled solids to the turbulence chamber and a cooling device for the indirect cooling of solids which come from the solids separator, in which the chlorine device includes several fluidized beds through which the solids migrate one after the other, characterized in that the first fluidized bed in which the hot solids arrive initially form the solids separator, whereby with fluidizing gas at temperatures in the range of 700 to 1100° C. and the presence of at least one dechlorination additive in the form of

• a) gaseous SO2 or sulfur-containing material which liberates SO2 in oxidizing atmosphere,
• b) silicates and aluminum silicates,
• c) activated silicates, or
• d) other alkali binding and HCl liberating additives which are supplied in at least stoichiometric quantity, the alkali quantities and metal chlorides of the solids supplied are reactivated.