A refuse incineration system comprising:
- (a) a first combustion housing defining a first combustion chamber having an upper and a lower first combustion chamber section;
- (b) a second combustion housing defining a second combustion chamber, said first and second combustion chambers in fluid communication each to the other by a gas passageway, a flue gas chamber formed in said second combustion housing in fluid communication by a stack gas passageway to a wash tower and a chimney;
- (c) refuse distribution means located at said upper section of said first combustion chamber for receiving refuse conveyed from a refuse storage housing on a refuse conveyor;
- (d) a plurality of screw pushers positioned below said refuse distribution means in said first combustion housing for delivering said refuse to said first combustion chamber;
- (e) a furnace grate located in said lower section of said first combustion chamber;
- (f) a refuse roller located adjacent said furnace grate for displacing said refuse to said furnace grate, said lower section of said first combustion chamber having an air distributor conduit mounted therein for supplying air to said furnace grate, a screw conveyor mounted below said furnace grate for removal of combusted refuse residue from said incineration system, a spray nozzle mounted in a side wall of said first combustion chamber lower section for spraying fuel therein to ignite said refuse on said furnace grate;
- (g) an air preheater mounted in an upper section of said second combustion chamber;
- (h) a high pressure superheated steam heater located in said second combustion chamber;
- (i) a high pressure saturated steam generator having an outlet fluidly coupled to said steam heater within said second combustion chamber, said steam heater fluidly coupled to a turbine external said second combustion chamber, said turbine being coupled to an electric generator and fluidly coupled to a waste steam condenser for insert of condensed water to said lower section of said first combustion chamber;
- and,
- (j) a gridiron structure located within said first combustion chamber extending between said lower and upper section of said first combustion chamber, said gridiron structure being formed of a plurality of gridiron tubular members for forming a structure to capture said refuse and form columnar walls of said refuse within said first combustion chamber and direct hot combustion gases upwardly from said lower section to said upper section along a first side of said columnar walls, over an upper end of said columnar walls and then downwardly along a second side of said columnar walls before flowing through said gas passageway, said gridiron tubular members including a through passage coupled on a first end in fluid communication with an inlet of said steam generator and coupled on a second end in fluid communication with the waste steam condenser for (1) transporting said condensed water therebetween, (2) cooling said gridiron structure, and (3) preheating said condensed water.