Vapor generator for fuels having different flame radiation intensities
AssigneesSulzer Brothers Limited, Mitsubishi Heavy Industries, Ltd.
InventorsTomotsuchi Kawamura, Hisao Haneda
Life of this patent
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Abstract
The vapor generator employs a convection heating surface in the gas flue upstream of the superheater heating surface in the exhaust gas flow. The burners for the different fuels are disposed in a common horizontal plane in the combustion chamber. In one embodiment, one water separator is disposed between the evaporator and convection heating surfaces while a second water separator is disposed between the convection and superheater heating surfaces. In another embodiment, one separator only is used with a change-over circuit means to connect the separator either between the evaporator and convection heating surfaces or between the convection and superheater heating surfaces.
Claims8
A vapor generator comprising
- an evaporator heating surface for a working medium defining a combustion chamber and an exhaust gas flue above said combustion chamber;
- at least one burner in said combustion chamber for burning a high flame radiation fuel to produce a flame and a flow of exhaust gas;
- at least one burner in said combustion chamber for burning a low flame radiation fuel to produce a flame and a flow of exhaust gas, said burners being disposed at a common level in said combustion chamber;
- a plurality of tubes defining a convection heating surface for the working medium within said exhaust gas flue and above said combustion chamber for passage of a flow of an exhaust gas thereover in heat exchange relation with the working medium therein;
- a superheater heating surface in said flue downstream of said convection heating surface relative to the flow of working medium and a flow of exhaust gas;
- and
- a water separator connected between said convection heating surface and said superheater heating surface for conducting the flow of working medium therebetween.
A vapor generator comprising
- an evaporator heating surface for a working medium defining a combustion chamber and an exhaust gas flue above said combustion chamber;
- at least one burner in said combustion chamber for burning a high flame radiation fuel to produce a flame and a flow of exhaust gas;
- at least one burner in said combustion chamber for burning a low flame radiation fuel to produce a flame and a flow of exhaust gas, said burners being disposed at a common level in said combustion chamber;
- a plurality of tubes defining a convection heating surface for the working medium within said exhaust gas flue and above said combustion chamber for passage of a flow of an exhaust gas thereover in heat exchange relation with the working medium therein;
- a superheater heating surface in said flue downstream of said convection heating surface relative to the flow of working medium and a flow of exhaust gas;
- a first water separator connected between said evaporator heating surface and said convection heating surface in the flow of working medium;
- and
- a second water separator connected between said convection heating surface and said superheater heating surface in the flow of working medium whereby during operation of said burner for high flame radiation fuel, said convection heating surface acts as a pre-superheater for the working medium and during operation of said burner for low flame radiation fuel said convection heating surface acts as a post-evaporator for the working medium.
Dependencies are inferred from the claim text.