GB1249967A - Improvements in or relating to waste gas burners - Google Patents

Abstract

1,249,967. Waste gas burner. J. SWITHENBANK. 9 July, 1970, No. 33306/70. Heading F4T. A waste gas burner 1 comprises an elongated tube 2, the lower end of which is provided with a flared air inlet 3 and with two rings of jets 4, 5 for injecting waste gases and steam respectively into the tube; the cross-section of the upper end of the tube is filled with a turbulence controlling matrix 6 and is surrounded by a cowl 7, a series of by-pass holes 8 being provided in the wall of the tube below the matrix. The matrix comprises concentric rings formed alternately of corrugated and plain strip metal, Fig. 2, and the cowl 7 is of truncated conical form with the smaller end sealed round the tube 2 below the by-pass holes 8. The mixture of waste gases, steam and entrained air pass up the tube 2, a fraction of the mixture passing through the holes 8 to burn on the rim of the cowl, thus providing a pilot flame, while most of the gases pass through the matrix and burn quietly. In alternative embodiments each ring of jets may be replaced by one jet, and/or the steam jet may be omitted. The waste gas burner may be supported from the ground on a stand, Fig. 3 (not shown), or alternatively it may be mounted on top of a flare stack burner, the air inlet being formed by a substantially annular gap between the burner and the stack, Fig. 4 (not shown).