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US 4,667,613 AGranted
Horizontal industrial boiler system with improved ash removal means
OwnerJohn S. Mayockinventor
Life of this patent
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Abstract
There is disclosed a boiler system in which ash-bearing fuels are fired in horizontal suspension and in which provision is made for the removal of the ash without shutting down or reducing the output of the system. The system comprises an upper water and steam drum and at least one lower water drum. A furnace cavity is located substantially between the upper drum and the lower drum, with the cavity being defined by a pair of side walls, a front wall, a rear wall, a ceiling and a floor. Means in the form of openings in the floor of the furnace cavity are located near the rear wall of the furnace cavity for permitting ash to be removed from the boiler system without requiring the shutting down or the reduction of the output of the boiler system.
Claims19
A boiler system in which ash-bearing fuels are fired in horizontal suspension and in which provision is made for the removal of the dry ash without shutting down or reducing the output of the system, said system comprising:
- an upper water and steam drum;
- at least one lower water drum;
- a furnace cavity located substantially between said upper drum and said lower drum, said cavity extending substantially the full length of the boiler and being defined by a pair of side walls, a front wall, a rear wall, a ceiling and a solid floor;
- a plurality of substantially vertical inner water tubes connecting said upper drum with said lower drum, said tubes being longitudinally spaced from said front wall to said rear wall to at least partially form the side walls of said furnace cavity;
- a convection zone disposed outside said substantially vertical inner water tubes and substantially parallel thereto;
- said convection zone having therein a plurality of substantially vertical outer water tubes connecting said upper drum with said lower drum;
- burner means near the front wall of said furnace cavity for firing ash-bearing fuel in horizontal suspension to create a flow of hot combustion gases that is directed horizontally towards the rear wall of said furnace cavity and then through at least a portion of said convection zone;
- means located near the rear wall of said furnace cavity for permitting dry ash to be removed from said boiler system without requiring the shutting down or the reduction of the output of said boiler system;
- and
- means for guiding said flow of hot combustion gases from the rear of said furnace cavity, into said convection zone, and then back towards the front of said convection zone, such that this reversal of the flow of hot combustion gases enhances the degree of dry ash fallout near said ash-removing means prior to said hot combustion gases flowing to an exit located near the front of said furnace cavity.
7 more elements
A boiler system in which ash-bearing fuels are fired in horizontal suspension and in which provision is made for the removal of dry ash without shutting down or reducing the output of the system, said system comprising:
- a furnace cavity extending substantially the full length of the boiler and having a pair of side walls, a front wall, a rear wall, a ceiling, and a solid floor;
- a convection zone disposed outside of and adjacent to said inner vertical water tubes and substantially parallel thereto;
- said convection zone having therein a plurality of substantially vertical outer water tubes connecting said upper drum with said lower drum;
- an upper water and steam drum located near the ceiling of said furnace cavity;
- a pair of lower water drums located near the floor of said furnace cavity, with the first lower water drum being located near one side wall of said furnace cavity and the second lower water drum being located near the other side wall of said furnace cavity;
- a plurality of substantially vertical inner water tubes connecting said upper water and steam drum with said lower water drums, said vertical inner tubes being longitudinally spaced from said front wall to said rear wall in said furnace cavity, some of said inner water tubes extending substantially vertically from said upper water and steam drum downwardly to form one of said side walls and then connecting to one of said lower water drums, and at least some of the remaining ones of said inner water tubes extending substantially vertically from said upper water and steam drum downwardly to form the other one of said side walls and then connect to the other of said lower water drums;
- burner means located near the front wall of said chamber for firing ash-bearing fuels in horizontal suspension to create a flow of hot combustion gases that is directed horizontally towards the rear wall of said furnace cavity;
- means at said rear wall for directing said gases through said convection zone toward the front of said boiler system such that this reversal of the flow of hot combustion gases enhances the degree of dry ash fallout prior to said hot combustion gases flowing to an exit located near the front of said furnace cavity;
- and
- an opening in said floor near the rear of said furnace cavity, whereby the dry ash deposited from said hot combustion gases falls through said opening without requiring the shutting down or the reduction of the output of said boiler system.
7 more elements
A horizontal, industrial boiler system in which ash-bearing fuels are fired in horizontal suspension and in which provision is made for the removal of dry ash without shutting down or reducting the output of the system, said system comprising:
- a furnace cavity extending substantially the full length of the boiler and having a pair of side walls, a front wall, a rear wall, a ceiling, and a solid floor;
- a convection zone concentrically disposed adjacent to and outside of said furnace cavity, said convection zone having therein a plurality of substantially vertical outer water tubes connecting said upper drum with said lower drum;
- an upper water and steam drum located near the ceiling of said cavity;
- a pair of lower water drums located near the floor of said furnace cavity, with the first lower water drum located near one side wall of said furnace cavity and the second lower water drum located near the other side wall of said furnace cavity;
- a plurality of substantially vertical inner water tubes connecting said upper water and steam drum with said lower water drums, said tubes being longitudinally spaced from the front wall to the rear wall of said furnace cavity to at least partially define a wall between said furnace cavity and said convection zone, with at least some of said vertical inner water tubes extending toward one of said side walls, then extending substantially vertically to form said one of said side walls extending down to a location near said first lower water drum, and then extending substantially horizontally and parallel to form the floor of said furnace cavity and terminate in said second lower water drum located on the opposite side wall of said furnace cavity, thus at least partially defining the top, sides and bottom of said furnace cavity;
- burner means located near the front of said furnace cavity for firing ash-bearing fuels in horizontal suspension to create a flow of hot combustion gases that is directed horizontally towards the rear of said furnace cavity;
- an opening in the floor near the rear of said furnace cavity, whereby the dry ash that falls out of said hot combustion gases falls through said opening without requiring the shutting down or the reduction of the output of said boiler system, and
- means for guiding said flow of said hot combustion gases from the rear of said furnace cavity through said convection zone, such that this reversal of the flow of hot combustion gases enhances the degree of dry ash fallout near said ash-removing means prior to said hot combustion gases flowing to an exit located near the front of said furnace cavity.
5 more elements
Dependencies are inferred from the claim text.