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US 5,474,442 AGranted
Vaporizing diesel burner
AssigneeAdvanced Mechanical Technology, Inc.
InventorsJoseph Gertsmann, Elia P. Demetri, Jordan N. Jacobs, Donald W. Pickard
Life of this patent
Estimating the term…
Abstract
Diesel fuel is vaporized and then burned on a cylindrical screen flame holder. The fuel is vaporized in a finned, vertical tube vapor generator and directed through a superheater tube past the flame to a flow control valve and nozzle. A flow restriction is provided between a liquid fuel supply and the vapor generator. The flame holder is vertically supported over a mixer and the nozzle. A flame deflector about the flame holder and a reservoir about the nozzle collect fuel condensate during start-up.
Claims25
A vaporizing liquid fuel burner, comprising:
- a nozzle issuing vaporized fuel;
- a flame holder, aligned along a vertical axis, receiving the vaporized fuel from the nozzle for combustion to generate a radially flowing flame;
- a vaporizer converting liquid fuel into the vaporized fuel received by the nozzle, the vaporizer including:
- a vertically extending elongate tube positioned adjacent to and spaced apart from the flame holder, and
- fins formed on a portion of the elongate tube laterally adjacent to the flame holder to be exposed to the flame;
- a liquid fuel source providing the liquid fuel to the vaporizer under pressure;
- and
- a mixer positioned between the flame holder and the nozzle enabling combustion air to be entrained by the vaporized fuel issuing from the nozzle, the flame holder, mixer, and nozzle being oriented on the same vertical axis such that the flame holder is above the mixer and the mixer is above the nozzle.
5 more elements
A vaporizing liquid fuel burner, comprising:
- a nozzle issuing vaporized fuel;
- a flame holder, aligned along a vertical axis, receiving the vaporized fuel from the nozzle for combustion to generate a radially flowing flame;
- a vaporizer converting liquid fuel into the vaporized fuel received by the nozzle, the vaporizer including:
- a vertically extending elongate tube positioned adjacent to and spaced apart from the flame holder, and
- fins formed on a portion of the elongate tube laterally adjacent to the flame holder to be exposed to the flame;
- a liquid fuel source providing the liquid fuel to the vaporizer under pressure;
- and
- a preheat torch for vaporizing fuel in the vaporizer during start up.
5 more elements
A method of vaporizing and burning liquid fuel comprising:
- providing a liquid fuel supply, a flame holder, a vaporizer comprising unrestricted elongated tubes each having a long axis oriented substantially in the vertical direction, a bottom end for receiving liquid fuel from the liquid fuel supply and a top end for directing vaporized fuel to the flame holder, and a vapor flow limiting means for limiting the flow of vaporized fuel from the vaporizer to the flame holder;
- pressurizing the liquid fuel supply;
- directing pressurized liquid fuel to the vaporizer and directing vaporized fuel from the vaporizer to the vapor flow limiting means;
- exposing the tubes of the vaporizer to a flame on the flame holder;
- and
- controlling the restriction of the vapor flow limiting means to balance a pressure of the vaporized fuel with a pressure of the liquid fuel and maintain a liquid fuel/vaporized fuel interface within the tubes substantially below the top end of the tubes due to a lower coefficient of heat transfer of the vaporized fuel relative to the liquid fuel such that in response to a high vaporized fuel pressure the liquid fuel/vaporized fuel interface is lowered in flame region thereby decreasing heat transfer to the vaporized fuel and the liquid fuel causing a decrease in vaporized fuel pressure and thus allowing the liquid fuel/vaporized fuel interface to return back to an equilibrium level.
3 more elements
A vaporizing liquid fuel burner, comprising:
- a nozzle issuing vaporized fuel;
- a flame holder, aligned along a vertical axis, receiving the vaporized fuel from the nozzle for combustion to generate a radially flowing flame;
- a vaporizer adjacent to and spaced apart from the flame holder to be exposed to the flame to convert liquid fuel into the vaporized fuel and balancing a pressure of the liquid fuel and a pressure of the vaporized fuel so that a liquid fuel/vaporized fuel interface is vertically stabilized within a portion of the vaporizer directed exposed to the flame by automatically changing heat transfer from the flame to the vaporized fuel and the liquid fuel in response to changes in the vertical position of the liquid fuel/vaporized fuel interface;
- a liquid fuel source providing the liquid fuel to the vaporizer under pressure;
- and
- a preheat torch for vaporizing fuel in the vaporizer during start up.
3 more elements
A vaporizing liquid fuel burner, comprising:
- a) a pressurized liquid fuel supply;
- b) a flame holder which receives vaporized fuel from the pressurized liquid fuel supply;
- c) a vaporizer coupled between the pressurized liquid fuel supply and the flame holder for providing the flame holder with vaporized fuel, the vaporizer comprising unrestricted elongated tubes each having a long axis oriented substantially in the vertical direction, a bottom end for receiving liquid fuel from the pressurized liquid fuel supply, a top end for directing vaporized fuel to the flame holder, fins formed along a portion of each elongated tube defining a flame region of the tube exposed to a flame on the flame holder, liquid fuel within the flame region of the tubes being vaporized to form a liquid fuel/vaporized fuel interface within the flame region;
- and
- d) a vapor flow limiting means for limiting the flow of vaporized fuel from the vaporizer to the flame holder, the vapor flow limiting means being sized such that a pressure of the vaporized fuel is balanced with a pressure of the liquid fuel to maintain the liquid fuel/vaporized fuel interface stabilized within the flame region of the tubes substantially below the top end of the tubes due to a lower coefficient of heat transfer of the vaporized fuel relative to the liquid fuel such that in response to a high vaporized fuel pressure the liquid fuel/vaporized fuel interface is lowered in flame region thereby decreasing heat transfer to the vaporized fuel and the liquid fuel causing a decrease in vaporized fuel pressure and thus allowing the liquid fuel/vaporized fuel interface to return back to an equilibrium level.
2 more elements
Dependencies are inferred from the claim text.