Burner for a fluid fuel
AssigneeSulzer Brothers Limited
InventorHermann J. Janssen
Life of this patent
Estimating the term…
Abstract
The burner is constructed with three concentric annular spaces which terminate in a ceramic muffle and a plurality of straight passages which extend coaxially through the muffle. The innermost space surrounds a burner lance and is supplied with fresh air while the other annular spaces and passages are supplied with a flue gas/air mixture from a distribution chamber. This latter chamber is connected to a take-off line of the combustion chamber in order to receive the flue gas and various means can be used to mix fresh air into the flue gas before entry into the distribution chamber.
Claims24
A burner for a fluid fuel, said burner comprising a fuel supply;
- means defining a first inner annular space for connection to a source of fresh air and having a plurality of swirl-inducing elements therein;
- means defining a second annular space for connection to a source of flue gas/air mixture about said first annular space and having a plurality of swirl-inducing elements therein;
- means defining a third annular space about said second annular space for connection to a source of flue gas/air mixture;
- and
- means defining a plurality of circumferentially distributed straight passages disposed around said third annular space and connected to a source of flue gas/air mixture.
A burner for a fluid fuel comprising
- means defining a first annular space;
- a plurality of swirl-inducing elements in said space;
- a burner lance for connection to a fuel source extending through said space to deliver fuel therethrough;
- means defining a second annular space about said first annular space;
- a plurality of swirl-inducing elements in said second annular space;
- means defining a third annular space about said second annular space;
- means defining a plurality of circumferentially distributed straight passages disposed coaxially around said third annular space;
- a connection for supplying fresh air from a fresh air source to said first annular space;
- and
- a distribution chamber connected to said second and third annular spaces and said passages for supplying a flue gas/air mixture thereto from a flue gas/air mixture source.
In combination with a steam generator having a combustion chamber and a flue gas channel;
- a burner for delivering a flame to said combustion chamber, said burner comprising means defining a first annular space;
- a plurality of swirl-inducing elements in said space;
- a burner lance extending through said space to deliver fuel therethrough;
- means defining a second annular space about said first annular space;
- a plurality of swirl-inducing elements in said second annular space;
- means defining a third annular space about said second annular space;
- a plurality of circumferentially distributed straight passages disposed coaxially around said third annular space;
- a connection for supplying fresh air to said first annular space;
- and a distribution chamber connected to said second and third annular spaces and said passages for supplying a flue gas/air mixture thereto;
- a fresh air blower connected to said connection to deliver fresh air thereto;
- a take-off line connected to said flue gas channel to remove a portion of flue gas therefrom;
- a duct connecting said line to said distribution chamber of said burner;
- a circulating blower between said take-off line and said duct;
- and
- means connected to one of said take-off line and said duct to deliver fresh air thereto for mixing with the flue gas therein.
Dependencies are inferred from the claim text.