Combustion chamber with two-stage combustion
AssigneeAsea Brown Boveri AG
InventorYau-Pin Chyou
Life of this patent
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Abstract
A combustion chamber with two-stage combustion has primary burners (110) of the premix type of construction, in which the fuel injected via nozzles (117) is intensively mixed with the combustion air inside a premix space (115) prior to ignition. The primary burners are of flame-stabilizing design, i.e. they are designed without a mechanical flame retention baffle. They are provided with tangential inflow of the combustion air into the premix space (115). Arranged downstream of a precombustion chamber (61) are secondary burners (150) which are designed as premix burners which do not operate by themselves.
Claims12
A combustion chamber with two-stage combustion, comprising:
- at least one wall defining a first stage combustion chamber and a second stage combustion chamber;
- at least one primary premixing burner having means for introducing combustion air into a burner premixing space in a tangential direction, and fuel injection nozzles to inject fuel into the combustion air, an outlet of the primary premixing burner connecting to the first combustion chamber, wherein the tangentially directed flow of combustion air into the premixing space produces a flame-stabilizing swirl in a flow exiting the outlet of the primary premixing burner;
- and
- at least one secondary burner which is disposed with an outlet downstream of the first stage combustion space, the secondary burner having means to introduce a premixture of fuel and combustion air into the second stage combustion chamber for auto-ignition of the premixture in the second stage combustion chamber.
Dependencies are inferred from the claim text.