GB819964A - Improvements in or relating to burner - Google Patents

Abstract

819,964. Liquid fuel burners. BLOOM ENGINEERING CO. Inc. Feb. 17, 1956 [April 26, 1955], No. 4991/56. Class 75(1) [Also in Group XII] In a burner construction for furnaces with a chamber having an admission means for combustion air and gaseous fuel and a discharge end for the combustion air wherein the chamber is closed by a perforated baffle fastened adjacent the burner discharge end and penetrated by a central fuel feed passage supplied by a fuel admission tube the passage terminates close to the forward face of the baffle and is surrounded at its terminal part by air openings which penetrate the baffle with their axis extending in the direction of the fuel admission tube, the baffle has a flush surface on the discharge side thereof and the openings have length sufficient to direct the combustion air, are radially spaced outwardly of the fuel admission tube towards the baffle periphery and are separated peripherally from each other. In the arrangement shown in Fig. 1 air admitted to a channel 13 passes through apertures 25 in a baffle 23 of refractory material into a combustion zone 33 formed by a refractory member 32. The leading edges of apertures 25 are rounded and have a length to diameter ratio of about 3:1. Fuel is fed to the combustion zone 33 through a pipe 14 the forward end of which passes through the baffle 23 and is provided with apertures 31 which direct fuel outwardly between the air streams issuing from the apertures 25. The refractory member 32 may be outwardly, Fig. 1, or inwardly, Fig. 5 (not shown), tapered and the outlet may be of circular or rectangular cross-section. In a modification the tube 14 is open ended at its forward end. Oil atomized by steam or air may also be used. In the arrangement shown in Fig. 3 the burner 10, 32 is located at the top of a soaking pit 34 to uniformly heat ingots 37 and the flue 40 is at the bottom. In a further arrangement shown in Fig. 8 work-pieces 44 are pushed through heating zones 48, 49, 50 and the products of combustion from the burners 10<SP>11</SP> pass in the opposite direction, the movement of the work-pieces 44 and out through a flue 51.