Method for recovery of heat from combustion gases from a rotary dryer and the installation for recovery of heat from combustion gases from a rotary dryer

摘要

The notification shall cover the recovery of heat from the crankcase exhaust and the installation for the recovery of heat from the crankcase exhaust. The method is that the gases produced by burning the gas in the combustion chamber (10) are mixed with the cooling air in the mixing chamber (2),where cooling air is added to the exhaust gas up to the mixing temperature of the exhaust gas from 280'c to 900'c, then the hot mixture is directed to the drying drum (1) and at the same time through the heating exhaust gas path (9) to the heat exchanger (5),where the exhaust is heated for combustion and the cooled exhaust is routed through the cooling air path (3) to the combustion chamber (10),and the combustion air heated to temperature from 200oC to 600oC is fed by the combustion air path (11) to the gas burner (8),where the hot air mixes with the gas and burns the hot mixture. The installation has a gas burner (8) located in the combustion chamber (10),combined with the mixing chamber (2),which is connected by the combustion air heater (9) path with the heat exchanger (5),Whereas the heat exchanger (5) is connected to the cooling air path (3) and the combustion air path (11) to the burner (8) to the gas path (7),in addition, the cooling air path (3) is connected to the combustion chamber (10).