Buhler Ag

Abb Research Ltd.

Lothar Reh

Beat Hani

Arthur Ruf

Marc Tesch

Yunhong Wang

Klaus Dobbeling

Klaus D&ouml;bbeling

Frank Goedicke

Thomas Meili

A method and apparatus for operating a gas turbine installation combustion chamber with liquid fuel, by means of which the NO,are similar to those for gaseous fuels. The liquid fuel (,) is evaporated in two steps in an evaporative reactor (,). The liquid fuel (,) is first atomized to a fuel vapor/liquid fuel mixture (,) by direct heat exchange with a first heat exchange medium (,). The evaporation of the remaining residue of the liquid fuel (,) takes place by indirect heat exchange with a second heat exchange medium (,). An evaporative reactor (,) is arranged which accommodates, at its inlet end, a dual-fluid nozzle (,) connected both to a liquid fuel line (,) and to a supply line (,) for a first heat exchange medium (,).

Appliance for operating a gas turbine installation combustion chamber with liquid fuel

The object of the invention is to produce a method, for operating a gas turbine installation combustion chamber with liquid fuel, by means of which the NO.sub.X figures obtained when liquid fuel is employed are similar to those for gaseous fuels. The size of the burner is then also reduced. It is also an object of the invention to provide a corresponding appliance for carrying out the method. This is achieved in accordance with the invention in that the liquid fuel (38) is evaporated in at least two steps in a separate evaporative reactor (12). In this arrangement, the liquid fuel (38) is first atomized to a fuel vapor/liquid fuel mixture (61) by direct heat exchange with a first heat exchange medium (21) and is instantaneously evaporated in this process. The evaporation of the remaining residue of the liquid fuel (38) then takes place by indirect heat exchange with a second heat exchange medium (51). For this purpose, an evaporative reactor (12) is arranged vertically upstream of the combustion chamber (2) and is connected to it, which evaporative reactor (12) accommodates, at its inlet end, a dual-fluid nozzle (22) connected both to a liquid fuel line (19) and to a supply line (20) for a first heat exchange medium (21).

Method and appliance for operating a gas turbine installation combustion

A method for metering solid present in the gas/solid stream of a fluidized-bed apparatus, in which gas and solid are present as a prehomogenized, free-flowing mixture in a fluidized bed and in which at least one outlet orifice for removal of the gas/solid stream is provided in an outflow pipe. The method provides for feeding a particulate phase and a gas phase, homogenizing the two phases in a fluidized bed, discharging the two-phase flow via a discharge pipe and injecting gas into the discharge pipe.

Method for dosing a particulate phase in a gas/particle flow in a

A dosing apparatus provides for dosing a particulate phase within a free flowing two phase flow of a gas phase and the particulate phase, wherein the two phase flow leaves a fluidized bed. The apparatus includes, at its bottom, a gas inlet mechanism to supply the gas via an orifice, and an outlet orifice with a discharge pipe. Control of the gas flow to maintain a predetermined level of the bed is attained by weighing the contents of the bed or by use of sensors within a treatment space of the apparatus. Widening mechanism may be located subsequent to the outlet orifice for widening the stream of particulate phase for exposing an enlarged surface area of particles for treatment.

Apparatus and method for dosing

Apparatus meters solid present in the gas/solid stream from a fluidized-bed apparatus, in which gas and solid are present as a prehomogenized, free-flowing mixture in a fluidized bed and in which at least one outlet orifice for removal of the gas/solid stream is provided in an outflow pipe. The metering apparatus has a discharge pipe with a gas injection nozzle for establishing a time-constant, emerging mass flow and for establishing the homogeneity of the emerging gas/solid stream. The pipe and nozzle are coordinated with an outlet orifice of the bed apparatus, and/or at least one device for influencing the prehomogenization.

Growing community of inventors

Zumikon, Switzerland

Lothar Reh