Cooling system for dry extraction of heavy bottom ash for furnaces during the storing step at the hopper

Abstract

The present invention relates to a cooling system for dry extraction of heavy bottom ash output from furnaces for solid fuel during storing step at hopper, characterized by suitable air intakes (), placed on the sidewalls of the hopper () at the hopper bottom, through which a controlled amount of cooling air passes sucked up in the combustion chamber () by the depression value therein, capable to achieve an uniform and balanced distribution system for such air during storing step at hopper () which optimizes the cooling of the falling ash, leaving the total amount of the air entering the furnace unchanged. The distribution header of the intakes () is connected to the extractor environment () by the lid () through a suitable conduit () provided with automated valve () being open during the storing step allowing the cooling air through to pass said intakes () placed on the sidewalls of the hopper (). A more efficient cooling may be obtained by any addition of water input by nozzles () suitably placed within the hopper (). The water amount may be adjusted such that the ash cooling improvement function is actuated without humidifying it.