PL413250A1 - System of stepped air distribution for counter-current burning for furnaces and the technology of burning in this system - Google Patents

Abstract

The system of graduated air distribution for countercurrent combustion for hearths includes an arched deflector (4) with a dimension of 20 - 100% of the width of the combustion chamber interior, a ceramic profile (6) located in front of it with a cross section similar to the letter L and a swirl (8) located above it cross-section similar to a truncated wedge or rectangle, formed from below into the shape of an arch. It can also be equipped with an arched deflector, tilted at least 3 ° up towards the window (3) batch. The arched straight deflector (4) and the arched deflector under the dish are provided with at least two stages (5). Combustion technology in the above-mentioned system consists in the fact that the air for countercurrent combustion is divided into primary air and air which heats up during the flow through the metal front chamber and introduced above the window (3) as secondary air. Flammable gases released from solid fuel flow from the rear wall of the furnace (2), along a straight arched deflector (4) or deflected arched deflector towards the front of the furnace (2), up to the mixing zone with secondary, after-burning air, and stages (5) of straight arched deflector (4) or deflected arched deflector increases gas flow turbulence by intensifying mixing with secondary air. Then, gasification products collected under the straight arc deflector (4) or deflected arc deflector from the furnace wall areas (2) pass into the central part of the afterburning area, where the temperature is highest, and the swirler (8) in the area above the straight arc deflector (4) or deflected an arched deflector causes swirling and additional mixing of exhaust gas and secondary air escaping from the combustion chamber.