The device comprises the opposed firing boiler, a flue and a chimney at the tail end of the flue, an air preheater is arranged on the flue, a closing-to-wall air nozzle is arranged on a water wall of the sidewall of the opposed firing boiler, the inner end of the closing-to-wall ...
The waste heat recovery system uses a heat exchanger coil (6) which matches the shape of the chimney and which is installed inside immediately above the junction with the flue gas duct. The coil can be made up of sections added one after the other, installed by insertion into the top of...