The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1998
Filed:
Nov. 06, 1996
ABB Research Ltd., Zurich, CH;
Abstract
In a premix burner for the combustion of gaseous and/or liquid fuel, in which the fuel is injected as secondary flow into a gaseous, ducted main flow, the premix duct (20) through which flow occurs being annular and being defined by an inner (21a) and an outer cylinder wall (21b), and the main flow being guided via vortex generators (9, 9a) which generate longitudinal vortices without a recirculation area and of which a plurality are arranged next to one another over the periphery of the annular duct (20) on at least one duct wall (21), and means for injecting fuel being arranged directly downstream of the vortex generators (9, 9a) on the inner and/or outer duct wall (21a, 21b), the vortex generators (9, 9a) generate such vortices which leave behind a residual vortex after the complete mixing of the fuel with the air of the fuel/air mixture flow. In this case, the annular main flow duct (20) of constant height (H) has a length (L) downstream of the vortex generators (9) and the fuel injection which is in the region of 5 to 20 times its height (H). It subsequently widens to form a circular main flow duct.