Fuel system for premix burner of a direct-fired steam generator

Details Fuel system for premix burner of a direct-fired steam generator Fuel system for premix burner of a direct-fired steam generator

2006-03-07

2006-03-07

Wilson, Gregory (Department: 3749)

Liquid heaters and vaporizers

Automatic control of fluid fuel and water

C122S446000

Reexamination Certificate

active

07007636

ABSTRACT:
A direct-fired, propane powered steam generator is provided with a carburetor, which receives vaporized propane from a converter arrangement which converts liquid propane to vapor, receives pressurized air and feeds a mixture of vaporized propane and air into the combustion chamber of the steam generator. The amount of air delivered to the carburetor is variable, with the amount of vaporized propane entering the carburetor being determined by the position of a metering valve which varies in accordance with the amount of air passing through the carburetor. The converter arrangement receives liquid propane and is coupled to process water heated in the water jackets of the combustion chamber and adjacent structure, the converter arrangement being designed so that heat from the water is transferred for effecting vaporization of the liquid propane. The flow of liquid propane for combustion in a pilot burner and for combustion in the main combustion chamber may be controlled using various arrangements of solenoid-operated lock off valves and/or vacuum-operated fuel lock off filters and/or air pressure balance control valves.

REFERENCES:
patent: 4211071 (1980-07-01), Wyatt
patent: 4462342 (1984-07-01), Welden
patent: 4508064 (1985-04-01), Watanabe
patent: 5685707 (1997-11-01), Ramsdell et al.
patent: 6135063 (2000-10-01), Welden

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