METHOD FOR COMBUSTIBLE MASS RECOVERY FROM BOTTOM ASH AND INSTALLATION FOR RECOVERY OF COMBUSTIBLE MASS FROM ASH

摘要

The method for combustible mass recovery from bottom ash, primarily sourced from the burners of power boilers, that is stoker-fired, pulverized fuel or fluidized-bed boilers, especially those fired by fossil fuels, municipal, agricultural, animal or industrial waste or sludge is characterized in that the bottom ash with combustible mass and slag crushed to a size of less than 5 mm being screened through an array of sieves with gradually decreasing mesh sizes, while subsequent sieves are used to capture plus mesh of graining over 1000 μm, preferably over 800 μm and most preferably over 500 μm, which then constitutes the recovered combustible mass. The installation for the recovery of combustible mass from ash characterized in that it consists of multi-sieve vibrating screen (10) equipped with several screens, each mesh size in the range of 5000 μm to 500 μm, while the mesh size of the finest screen is in the range of 1000 to 500 μm and preferably 800 μm; moreover it has a chute connected through a feeder (9) with a fly ash storage area (8) and through another feeder (6) with a hopper of minus mesh of a vibrating screen (5) of a mesh size of 5000 μm to 2000 μm, a chute of which is connected through a feeder (4) with a hopper of the crusher (3), a chute of which is connected through a feeder (2) with a bottom ash storage area (1) and through another feeder (7) with a hopper of plus mesh of vibrating screen (5).