Patent ID: 6301875
Filing Date: 2001-10-16
Classification: F23C,F23D

Abstract:
A heater for heating a gaseous stream flowing in a downstream direction through a duct bounded by duct walls, the heater comprising a flame shield extending along a line at least partially across the duct and including a plate having end edges which are spaced from and substantially parallel to the line and a plurality of spaced-apart slits arranged between and substantially parallel to the line and respective end edges of the plate, the edges being spaced apart from proximate duct walls; a heating gas supply pipe connected with the plate and extending along the line at least partially across the duct, the pipe including a plurality of spaced-apart orifices for discharging heating gas jets substantially parallel to the downstream direction past the flame shield; and a baffle plate extending from respective duct walls towards the line and ending in baffle edges which are spaced apart from and aligned with the plate edges.