Combustion – Separately supplied or controlled – physically related flame... – Coaxial
Patent
1989-10-02
1992-04-21
Dority, Carroll B.
Combustion
Separately supplied or controlled, physically related flame...
Coaxial
60 3955, 60746, 60747, 60748, 60 39826, 431183, 431185, F23Q 900
Patent
active
RE0338966
ABSTRACT:
In a combustion chamber having a substantially cylindrical housing and a flame tube [therein at an annular gap from a housing of the chamber,] with an end face, the flame tube being thermally movable and disposed in the combustion chamber and the flame tube being spaced from the cylindrical housing defining an annular gap therebetween, the improvement includes a burner apparatus having a burner axis and including at least one pilot burner [near an] having a head and being disposed in the vicinity of the end face of the flame tube for generating a pilot flame [from] , the pilot burner operating with at least one fuel from the group consisting of natural gas [and/or] and heating oil, an air supply channel surrounding the head [of the pilot burner], a premixing device for [natural gas] mixing gas and air in the form of a ring channel system surrounding the head, the ring channel system including flow conduction walls defining an inflow cross section at an air inflow side of the ring channel system being open toward the annular gap for conducting a majority of available combustion air in a given flow direction from the annular gap to a combustion zone developing downstream of the burner head in the flame tube, the combustion air having flow vectors with components entering the combustion zone in directions ranging from parallel to the burner axis to an acute angle relative to the burner axis, the combustion air components having swirl components superimposed thereon [tangentially relative] circumferentially to the burner axis [acting] , using the burner axis as a swirl center, [a multiplicity of nozzle tubes penetrating the inflow cross section in a direction substantially transverse to the flow direction, the nozzle tubes each having a side with nozzle openings facing away from the air inflow side of the ring channel system,] a device defining nozzle openings disposed in the ring channel system, and a [natural] gas feeding system [substantially concentrically surrounding the pilot burner and] connected to [one end of each nozzle tube, and a method of operating the same] the nozzle openings for feeding gas thereto.
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U.S. Publication ASME 82-GT-29, article "Alternative Fuels: Burner Concepts and Emission Characteristics of a Silo Combustor", by W. Krockow et al, pp. 1-10; FIG. 1 (date unknown).
Becker Bernard
Maghon Helmut
Dority Carroll B.
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
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