| 摘要 |
In a plant for natural gas furnaces and furnaces with other sulphur-free materials, with a boiler (4) heated by a burner (3) and an air pre-heater (2) for pre-heating the combustion air, the boiler is followed by a heat exchanger (6, 12) heated by flue gas and this is followed by a flue gas condensation heat exchanger (8) supplying heat via a heat transfer medium to the air pre-heater.The efficiency of the plant is thereby increased.<IMAGE> |
