Claims
- 1. In combination, a compact fluid heater comprising:
- a combustor for generating heat including high temperature combustion products, comprising:
- an essentially cylindrical chamber having oppositely disposed ends;
- a centrally located vent at one said chamber end;
- a burner in the other said chamber end comprising:
- an essentially cylindrical outer shell having inlet and outlet ends;
- means mounting said shell outlet end in said chamber adjacent said chamber burner end, said mounting means and shell outlet end defining secondary air inlet to said burner;
- a gas supply tube coaxially disposed in said shell, said tube having first and second ends, said second tube end adjacent said secondary air inlet,
- means supplying gaseous fuel to said first supply tube end;
- an annular orifice defined by said shell outlet end and gas supply tube second end;
- a plurality of gas ports in said gas supply tube second end, and said orifice, said ports circumferentially disposed in said annular orifice;
- means supplying primary combustion air to said outer shell inlet end; and,
- means supplying combustion air to said primary and secondary inlets;
- a coaxially disposed heat exchanger having internally flowing fluid for absorbing said combustor generated heat by flow of combustion products therethrough, and heating said fluid thereby, said combustion products collected in an outlet;
- stack means in fluid communication with said exchanger outlet for exhausting said gases to the atmosphere;
- means in said stack means capturing a controlled amount of said exhaust gases;
- means injecting said captured gas into said combustor supply means;
- means in said supply means, proportioning said captured gas among said primary and secondary combustion air inlets.
- 2. The fluid heater of claim 1 further comprising:
- a spin cone on said tube second end, said cone axially displaced intermediate said ports and shell outlet end, said cone having a plurality of vanes extending from an inner diameter, each vane having an angular deviation from base plane of said cone;
- wherein said spin cone imparts a helical trajectory to combusting gaseous fuel, primary air and flue gas passing through said shell outlet end.
- 3. The fluid heater of claim 2 wherein said deviation is in a range of 25.degree. to 35.degree..
- 4. The fluid heater of claim 1 further comprising:
- a plurality of gas nozzles extending from said gas supply tube ports, and into said primary air inlet, said nozzles circumferentially disposed in said annular orifice; and,
- a spin cone on said tube second end, said cone axially displaced intermediate said nozzles and shell outlet end.
- 5. In combination, a compact fluid heater comprising:
- a combustor for generating heat including high temperature combustion products, said combustor, having a source of gaseous fuel, and primary and secondary air inlets, comprising:
- an essentially cylindrical chamber having oppositely disposed ends;
- a centrally located circular vent at one said chamber end;
- a burner in the other said chamber end comprising:
- an essentially cylindrical outer shell having inlet and outlet ends;
- means mounting said shell outlet end in said chamber adjacent said chamber burner end, said mounting means and shell outlet end defining a secondary air inlet to said burner;
- a gas supply tube coaxially disposed in said shell, said tube having first and second ends, said second tube end adjacent said secondary air inlet;
- means supplying gaseous fuel to said second gas supply tube end;
- an annular primary air inlet defined by said shell inlet end and gas supply tube;
- a plurality of ports in said gas tube first end;
- means supplying combustion air to said primary and secondary air inlets; and,
- a coaxially disposed heat exchanger having internally flowing fluid for absorbing said combustor generated heat by flow of combustion products therethrough, and heating said fluid thereby, said combustion products collected in an outlet;
- stack means in fluid communication with said exchanger outlet for exhausting said gases to the atmosphere;
- means in said stack means capturing a controlled amount of said exhaust gases;
- means injecting said captured exhaust gas into said combustion air supply means;
- means in said supply means, proportioning said captured gas among said primary and secondary combustion air inlets.
- 6. In combination, a compact fluid heater comprising:
- a combustor for generating heat including high temperature combustion products comprising:
- a combustion chamber having inlet and outlets ends for generating high temperature combustion produces from combusting fuel and air therein;
- a burner mounted at said chamber inlet end for supplying combusting fuel and air to said chamber comprising:
- an essentially cylindrical outer shell having inlet and outlet ends, said outlet end adjacent said combustion chamber inlet;
- a burner secondary air inlet defined by said shell outlet and chamber inlet ends;
- a gas supply tube coaxially disposed in said shell, said tube having first and second ends, said second tube end adjacent said secondary air inlet;
- means supplying gaseous fuel to said first supply tube end;
- an annular primary air inlet defined by said shell outlet end and gas supply tube second end;
- a plurality of gas ports in said gas supply tube second end, said ports circumferentially disposed in said annular orifice;
- means supplying combustion air to said primary and secondary air inlets; and,
- heat exchange means in fluid communication with said combustion chamber outlet end, said heat exchange means receiving combustion products from said chamber and extracting heat therefrom, said exchanger having an outlet for exhausting said combustion products to the atmosphere;
- means capturing a predetermined amount of said combustion products;
- means injecting said captured combustion products into said combustion chamber.
- 7. The fluid heater of claim 6 further comprising:
- a spin cone on said tube second end, said cone mounted intermediate said gas ports and shell outlet end; and
- a serrated conoidal disk having a plurality of vanes extending from an inner diameter, each vane having an angular deviation from the base plane of said cone;
- wherein said spin cone imparts a helical trajectory to combusting gaseous fuel and primary mixtures exiting said shell outlet end.
- 8. The fluid heater of claim 7 wherein said angular deviation is within a range of 25.degree. to 35.degree..
- 9. The fluid heater of claim 6 wherein said combustion chamber capturing and injecting means further comprise:
- a wall, intermediate said combustion chamber ends,
- a blower for delivering said captured combustion gases to said chamber;
- an orifice in said chamber wall for injecting said combustion products into said chamber;
- means conducting said delivered combustion gases to said orifice;
- wherein said delivered combustion gases enter said combustion chamber and modify the ongoing combustion process.
- 10. In combination, a compact steam generator comprising:
- a combustor for generating heat including high temperature combustion products, said combustor having a source of gaseous fuel, and supply means for admitting primary and second air, and steam thereto;
- means supplying combustion air to said supply means;
- a coaxially disposed heat exchanger having internally flowing fluid for absorbing said combustor generated heat by flow of gaseous combustion products therethrough, and generating steam thereby;
- means collecting said gaseous combustion products;
- stack means in fluid communication with said exchanger collecting means for exhausting said gases to the atmosphere;
- means in said stack means capturing a controlled amount of said gases;
- means in said heat exchanger for capturing a controlled amount of steam generated therein;
- means supplying said captured gas and steam to said supply means; and
- means in said combustion air and steam supply means proportioning said captured gas and steam among said combustor inlets.
- 11. The steam generator of claim 10 wherein the combustor further comprises:
- an essentially cylindrical combustion chamber having oppositely disposed ends;
- a centrally located circular vent at one said chamber end;
- a burner in the other said chamber end comprising:
- an essentially cylindrical outer shell having inlet and outlet ends;
- means mounting said shell outlet end in said chamber adjacent said chamber burner end, said mounting means and shell inlet end defining a secondary combustion air inlet to said burner;
- a gas supply tube coaxially disposed in said shell, said tube having first and second ends, said first end adjacent said shell outlet end, and said second tube end adjacent said secondary combustion air inlet;
- means supplying gaseous fuel to said first supply tube end;
- an annular orifice defined by said shell outlet end and gas supply tube second end;
- a plurality of gas ports in said gas supply tube second end, said ports circumferentially disposed in said annular orifice;
- means supplying combustion air to said supply means primary and second inlets; and,
- a spin cone on said tube second end, said cone axially displaced intermediate said nozzles and shell outlet end.
- 12. The steam generator of claim 11 wherein said spin cone comprises
- a serrated cone having a plurality of vanes extending from an inner diameter, each vane having an angular deviation from base plane of said cone;
- wherein said spin cone imparts a helical trajectory to combusting gaseous fuels, primary air and steam passing through said shell outlet end and into said chamber.
- 13. The steam generator of claim 12 wherein the serrated cone includes an angular deviation in a range of 25.degree. to 35.degree..
- 14. The steam generator of claim 10, wherein said combustor and proportioning means further comprise:
- a combustion chamber for generating high temperature combustion gases, said combustion chamber having inlet and outlet ends and a side wall, said side wall defining an inlet orifice, said orifice providing fluid communication through said side wall and into said chamber;
- a burner mounted at said chamber inlet end for supplying combusting fuel and air to said chamber;
- means fluid communicating said chamber outlet and heat exchanger;
- means in said proportioning means for injecting said captured combustion products through said inlet orifice;
- wherein proportioned amounts of gaseous combustion products enter said chamber, thereby modifying the ongoing combustion process.
- 15. The steam generator of claim 14 wherein the combustor further comprises:
- a centrally located circular vent in said chamber outlet end;
- a burner in the other said chamber end comprising:
- an essentially cylindrical outer shell having inlet and outlet ends;
- means mounting said shell outlet end in said chamber adjacent said chamber inlet end, said chamber inlet end and shell outlet end defining a secondary air inlet to said burner;
- a gas supply tube coaxially disposed in said shell, said tube having first and second ends, said second tube end adjacent said secondary air inlet;
- means supplying gaseous fuel to said first supply tube end;
- an annular primary air inlet defined by said shell inlet end and gas supply tube second end;
- a plurality of gas ports extending from said gas supply tube second end, said nozzles circumferentially disposed in said primary air inlet;
- means supplying primary combustion air to said primary and secondary air inlets; and,
- a spin cone on said tube second end, said cone axially displaced intermediate said ports and shell outlet end.
- 16. The steam generator of claim 15 wherein said spin cone comprises
- a serrated cone having a plurality of vanes extending from an inner diameter, each vane having an angular deviation from base plane of said cone;
- wherein said spin cone imparts a helical trajectory to combusting gaseous fuels, primary air and steam passing through said shell outlet end and into said chamber.
- 17. The steam generator of claim 16 wherein the serrated cone includes an angular deviation in a range of 25.degree. to 35.degree..
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of copending application Ser. No. 07/760,023, filed on Sep. 11, 1991, U.S. Pat. 5,259,342, the specification of which is incorporated herein by reference.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
760023 |
Sep 1991 |
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