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:
Sep. 08, 1992
Filed:
Apr. 22, 1991
Giuseppe Ancona, Sesto San Giovanni, IT;
Giancarlo Benelli, Empoli, IT;
Gennaro De Michele, Pisa, IT;
Sergio Ligasacchi, San Giuliano Terme, IT;
Gianni Mascalzi, Como, IT;
Giancarlo Scavizzi, Milan, IT;
Giuliano Trebbi, Pisa, IT;
Aldo Zennaro, Milan, IT;
Ente Nazionale Per l'Energia Elettrica, Rome, IT;
Ansaldo Componenti s.r.l., Genova, IT;
Abstract
An improved burner (4) for fuel oil and fuel gas with low NOx production, wherein the combustion air is subdivided in three streams and with flow rate control swirlers in each air streams. The stream of primary air is intercepted by a swirler comprising an array of radially fixed tabs (15) mounted in correspondence to the outlet section in the combustion chamber (3), while the secondary and tertiary air swirlers comprise tabs (18, 19) turnable around axes disposed perpendicular and parallel to the central axis of the burner, respectively. The primary and secondary air inlets have a variable, continuously adjustable section. Furthermore, there are provided mass rate meters (24, 25) near the outlet section of the secondary and tertiary air streams in the combustion chamber (3) substantially unaffected by the vorticity induced by said swirlers.