초록 ▼

In a combustion chamber having a flame tube therein at an annular gap from a housing of the chamber, a burner apparatus including at least one pilot burner near an end face of the flame tube for generating a pilot flame from natural gas and/or heating oil, an air supply channel surrounding the head

In a combustion chamber having a flame tube therein at an annular gap from a housing of the chamber, a burner apparatus including at least one pilot burner near an end face of the flame tube for generating a pilot flame from natural gas and/or heating oil, an air supply channel surrounding the head of the pilot burner, a premixing device for natural gas in the form of a ring channel system surrounding the head including flow conduction walls defining an inflow cross section at an air inflow side of the ring channel system open toward the annular gap for conducting a majority of combustion air 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 from parallel to the burner axis to an acute angle to the burner axis, the combustion air components having swirl components superimposed thereon tangentially relative to the burner axis acting 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, 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.

대표청구항 ▼

In a combustion chamber having a substantially cylindrical housing and a flame tube with an end face, the flame tube being thermally movable and centered in the combustion chamber and the flame tube being spaced from the cylindrical housing defining an annular gap therebetween, the improvement compr

In a combustion chamber having a substantially cylindrical housing and a flame tube with an end face, the flame tube being thermally movable and centered in the combustion chamber and the flame tube being spaced from the cylindrical housing defining an annular gap therebetween, the improvement comprising a burner apparatus having a burner axis and including at least one pilot burner having a head and being disposed in the vicinity of the end face of the flame tube for generating a pilot flame, said pilot burner operating with at least one fuel from the group consisting of natural gas and heating oil, an air supply channel surrounding said head, a premixing device for the combustion of natural gas in the form of a ring channel system surrounding said head, said ring channel system including flow conduction walls defining an inflow cross section at an air inflow side of said 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 said burner head in the flame tube, the combustion air having flow vectors with components entering said combustion zone in directions ranging from parallel to said burner axis to an acute angle relative to said burner axis, said combustion air components having swirl components superimposed thereon tangentially relative to said burner axis, using said burner axis as a swirl center, a multiplicity of nozzle tubes penetrating said inflow cross section in a direction substantially transverse to said given flow direction, said nozzle tubes each having ends and having a side with nozzle openings facing away from said air inflow side of said ring channel system, and a natural gas feeding system substantially concentrically surrounding said pilot burner and being connected to one of said ends of each of said nozzle tubes.