Verfahren zur Vormischung von Luft mit gasförmigem Brennstoff und Brenneranordnung zur Durchführung des Verfahrens

Details

Veröffentlichungs-Nr.

EP2933560

Aktenzeichen

EP14165191

Anmeldetag

17. April 2014

Veröffentlichung

6. Dezember 2017

Erteilung

6. Dezember 2017

Rechtsraum

EP

IPC

F23R3/28F23R3/14F23C7/00

Abstract

A method for premixing air (33) with a gaseous fuel for being burned in a combustion chamber (12) comprises the steps of: guiding said air (33) in an air stream along a burner axis (13) through a coaxial air tube (11) into a combustion chamber (12) arranged at an end of said air tube (11); impressing a swirl on said air stream by passing it through a first swirl device (14) concentrically arranged within said air tube (11) and comprising a plurality of radially oriented first blades (29); injecting gaseous fuel into said air stream at said first swirl device (14); and mixing said air in said air stream with the injected gaseous fuel in a first mixing zone (15) arranged just after said first swirl device (29) An improved fuel/air premixing and low pressure drop is achieved by taking the further steps of: sending the mixed fuel/air stream leaving said first mixing zone (15) through at least one second swirl device (16) concentrically arranged within said air tube (11) and comprising a plurality of radially oriented second blades (30) to reduce the swirl of the mixed fuel/air stream; injecting gaseous fuel into said mixed fuel/air stream at said second swirl device (16); and further mixing said mixed fuel/air stream with the injected gaseous fuel in a second mixing zone (17) arranged just between said second swirl device (30) and said combustion chamber (19).

Anmelder

Firmen

Ansaldo Energia Switzerland AG
General Electric Technology GmbH
ALSTOM Technology Ltd

Land

🇨🇭 Schweiz

Fachgebiete