Apparatus for removal and cooling of ash from the bed of a fluidized bed furnace

An arrangement for extracting and cooling ash from a fluidized bed, comprising:

• a floor in said fluidized bed with at least one extraction pipe in said floor;
• a cooled conveyor operably connected to said extraction pipe, said cooled conveyor comprising a drag conveyor with two spaced chains and having means for separating said chains;
• a housing surrounding said cooled conveyor and having a plurality of cooled floors therein, said drag conveyor traveling over said cooled floors and pushing the ash over said cooled floors to bring the ash to be cooled in direct contact with said cooled floors, each of said plurality of cooled floors being located one above another to form a plurality of levels, each of said plurality of cooled floors also being divided into a plurality of tables separated by spaced slots extending transversely across the direction of travel of said cooled conveyor, each of said plurality of tables on any one level being displaced in said direction of travel relative to the tables of a neighboring level which is disposed below said any one level so that a rear end, relative to said direction of travel, of each of said plurality of tables on said any one level is above a front end, relative to said direction of travel of a corresponding table on any one neighboring immediately level.