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AssigneesEnel S.p.A., Ansaldo Energia S.p.A.
InventorsMarco Alberti, Roberto Rizzi, Marcello Martano, Gennaro De Michele, Sergio Ligasacchi
Estimating the term…
A nozzle for the injection of solid fuel in dust form into a combustion chamber, to be installed in correspondence with the outlet of a burner coaxially to the longitudinal axis of the burner, comprising a stationary annular part divided into coal ducts of a circumferential width that decreases towards outlet section to form coal-dust-rich air streams, a central duct for a coal-dust-poor air stream sideways delimited by the coal ducts and having an outlet end, a central member that is axially mobile within the central duct, for varying the cross section of a central passage delimited by the stationary annular part at the outlet end. Air ducts for the coal-dust-poor air stream are formed between each pair of adjacent coal ducts in the stationary annular part communicating with the central duct and having a circumferential width increasing toward the outlet end. Deflectors for the coal-dust-poor stream are provided at the outlet from the ducts to direct the stream from each air duct in a direction diverging radially from the central duct.
A nozzle for the injection of solid fuel in dust form into a combustion chamber, to be installed at the outlet of a burner coaxially to the longitudinal axis of the burner, comprising a stationary annular part divided into coal ducts, each of a circumferential width that decreases towards an outlet section to form coal-dust-rich air streams, a central duct for a coal-dust-poor air stream radially delimited by said coal ducts and having an outlet end, a central member that is axially mobile within said central duct, for varying the cross section of a central passage delimited by said stationary annular part at said outlet end, air ducts for the coal-dust-poor air stream formed between each pair of adjacent coal ducts in said stationary annular part, said air ducts communicating with said central duct, said air ducts having a circumferential width that increases toward said outlet end, and deflector means for said coal-dust-poor air stream provided at the outlet from said air ducts to direct said coal-dust-poor air stream from each air duct in a direction diverging radially from said central duct.
Dependencies are inferred from the claim text.