High output tube burner

A burner assembly for combining air and fuel to produce a burn firing into a tube, the burner assembly comprising

• a burner housing formed to include a discharge outlet and an interior region containing combustion air,
• a thin-walled sleeve situated in the interior region, the thin-walled sleeve being formed to include an inlet end, an outlet end, and a mixing region between the inlet and outlet ends, the thin-walled sleeve having a central longitudinal axis and including a cylindrical intake end at the inlet end and a hollow conical transition section mating with the cylindrical intake end and converging toward the outlet end of the thin-walled sleeve,
• means for regulating flow of combustion air from the interior region of the burner housing into the mixing region in the thin-walled sleeve through the inlet end formed in the thin-walled sleeve,
• means for supplying a gaseous fuel into the mixing region in the thin-walled sleeve, the supplying means extending through the interior region of the burner housing and into the mixing region through the inlet end of the thin-walled sleeve,
• means for connecting the outlet end of the thin-walled sleeve to a tube positioned outside of the housing in a liquid-containing tank, the connecting means extending through the discharge outlet formed in the burner housing to fire a burn produced in the mixing region of the thin-walled sleeve into the tube to heat any liquid extant in the liquid-containing tank, the outlet end of the thin-walled sleeve defining an opening having an internal diameter equivalent to the internal diameter of a tube connected to the outlet end of the thin-walled sleeve by the connecting means, and
• means for igniting the combustible mixture in the mixing region of the thin-walled sleeve to cause partial combustion to take place in the mixing region and to fire a burn into the tube coupled to the outlet end of the thin-walled sleeve and extended into the interior solution-containing region of the solution tank so that combustion begins in the mixing region of the funnel, progresses and transitions gradually into the tube, and is completed outside of the mixing region and inside the tube, and wherein the hollow conical transition section has an effective length along the central longitudinal axis of the thin-walled sleeve and the ratio of the effective length of the hollow conical transition section to the internal diameter of the opening defined in the outlet end of the thin-walled sleeve is at least 1.37 and at most 2.58.

A burner assembly for combining air and fuel to produce a burn firing into a tube, the burner assembly comprising

• a burner housing formed to include a discharge outlet and an interior region,
• a thin-walled sleeve situated in the interior region, the thin-walled sleeve being formed to include an outlet end coupled to the discharge outlet formed in the burner housing, an opposite inlet end, and a mixing region communicating with the inlet and outlet ends, the thin-walled sleeve having a central longitudinal axis and including a cylindrical intake end at the inlet end and a hollow conical transition section mating with the cylindrical intake end and converging toward the outlet end of the thin-walled sleeve,
• means for supplying a gaseous fuel into the mixing region in the thin-walled sleeve,
• means for introducing combustion air into the mixing region in the thin-walled sleeve through the inlet end in the thin-walled sleeve, the burner housing being formed to include an air supply inlet coupled to the introducing means,
• means for connecting the outlet end of the thin-walled sleeve to a tube positioned outside of the housing in a liquid-containing tank, the connecting means extending through the discharge outlet formed in the burner housing to fire a burn produced in the mixing region of the thin-walled sleeve into the tube to heat any liquid extant in the liquid-containing tank, the outlet end of the thin-walled sleeve defining an opening having an internal diameter equivalent to the internal diameter of a tube connected to the outlet end of the thin-walled sleeve by the connecting means, and
• means for igniting the combustible mixture in the mixing region of the thin-walled sleeve to cause partial combustion to take place in the mixing region and to fire a burn into the tube coupled to the outlet end of the thin-walled sleeve and extended into the interior solution-containing region of the solution tank so that combustion begins in the mixing region in the thin-walled sleeve, progresses and transitions gradually into the tube, and is completed outside of the mixing region and inside the tube, and wherein the cylindrical intake end has an effective length along the central longitudinal axis of the thin-walled sleeve, and the ratio of the effective length of the cylindrical intake end to the internal diameter of the opening defined in the outlet end of the thin-walled sleeve is at least 0.125 and at most 0.50.