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US 2003/0145768 A1Published application
Overfire air port and furnace system
OwnerJoel Vatskyinventor
Life of this patent
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Abstract
An Overfire Air (OFA) port design and method for use in a furnace system is disclosed. The OFA port design effectively reduces the amount of harmful pollutants emitted into the atmosphere upon discharge from an associated furnace.
Claims29
A furnace comprising:
- (a) a housing including sidewalls;
- (b) at least one burner defining a combustion zone arranged within said housing, a plurality of vertical lanes defined by space between said sidewalls and opposing sides of said combustion zone;
- and
- (c) a plurality of overfire air (OFA) ports arranged in said housing located above said combustion zone, said OFA ports arranged in a plurality of rows including an upper row and a lower row, said upper row having more of said OFA ports than said lower row, said upper row being arranged at a greater vertical distance than said lower row from said combustion zone than said lower row, at least one of said OFA ports in said lower row arranged in at least one of said vertical lanes.
1 more element
An overfire air (OFA) port for use in a furnace, said OFA port comprising:
- (a) an inner barrel having inlet and outlet ends, said inner barrel defining an inner passageway extending between said inlet and outlet ends thereof through which air is permitted to flow;
- (b) an outer barrel having inlet and outlet ends, said outer barrel surrounding at least a portion of said inner barrel, said outer barrel defining an outer passageway extending between said inlet and outlet ends thereof through which air is permitted to flow;
- and
- (c) at least one baffle arranged between said inner and outer barrels to interrupt the flow of air as it exits said outlet end of said outer barrel.
1 more element
An overfire air (OFA) port for use in a furnace, said OFA port comprising:
- (a) an inner barrel having inlet and outlet ends, said inner barrel defining an inner passageway extending between said inlet and outlet ends thereof through which air is permitted to flow, said inner barrel further comprising an inner inlet section, an inner transitional section, and a geometric section;
- (b) an outer barrel having inlet and outlet ends, said outer barrel surrounding at least a portion of said inner barrel, said outer barrel defining an outer passageway extending between said inlet and outlet ends thereof through which air is permitted to flow, said outer barrel further comprising an outer inlet section and an outer transition section;
- and
- (c) at least one baffle arranged between said inner and outer barrels to interrupt the flow of air as it exits said outlet end of said outer barrel.
1 more element
A furnace comprising:
- (a) at least one burner defining a combustion zone;
- (b) at least one overfire air (OFA) port including:
- (i) an inner barrel having inlet and outlet ends, said inner barrel defining an inner passageway extending between said inlet and outlet ends thereof through which air is permitted to flow;
- (ii) an outer barrel having inlet and outlet ends, said outer barrel surrounding at least a portion of said inner barrel, said outer barrel defining an outer passageway extending between said inlet and outlet ends thereof through which air is permitted to flow;
- and
- (iii) at least one baffle arranged between said inner and outer barrels to interrupt the flow of air as it exits said outlet end of said outlet end of said outer barrel.
3 more elements
A furnace comprising:
- (a) a housing;
- (b) at least one burner comprising a combustion zone;
- (c) a plurality of overfire air (OFA) ports arranged in said housing located above said combustion zone, said OFA ports arranged in a plurality of rows including an upper row and a lower row, said upper row having more of said OFA ports than said lower row, said upper row being arranged at a greater vertical distance than said lower row from said combustion zone than said lower row, at least one of said OFA ports in said lower row arranged in at least one of said vertical lanes;
- and
- (d) at least one OFA port including
- (i) an inner barrel having inlet and outlet ends, said inner barrel defining an inner passageway extending between said inlet and outlet ends thereof through which air is permitted to flow;
- (ii) an outer barrel having inlet and outlet ends, said outer barrel surrounding at least a portion of said inner barrel, said outer barrel defining an outer passageway extending between said inlet and outlet ends thereof through which air is permitted to flow;
- and
- (iii) at least one baffle arranged between said inner and outer barrels to interrupt the flow of air as it exits said outlet end of said outer barrel.
6 more elements
A method of efficiently operating a furnace, the method comprising:
- (a) removing a portion of the combustion air from a combustion zone through use of an overfire air (OFA) system;
- (b) reinjecting said portion of combustion air into the furnace above said combustion zone by directing said portion of combustion air through OFA ports arranged in at least two rows in at least one upper row and at least one lower row located above the combustion zone;
- (c) further directing air through at least one OFA port located in a row closest to the combustion zone in at least one vertical lane located between the outermost edge of the combustion zone and the furnace sidewall.
Dependencies are inferred from the claim text.