| 摘要 |
PROBLEM TO BE SOLVED: To effectively blow a soot in a heat exchanger for an exhaust gas. SOLUTION: The method for blowing the soot of the heat exchanger for the exhaust gas having a first heat exchanging unit 7 and a second heat exchanging unit 8 including a plurality of heat transfer tubes 6 disposed in multi-stages in such a manner that the units 7 are provided in a rising flow duct 1, the units 8 are provided in a falling flow duct 2, and a soot blowing means 15 provided above the units 7, 8 comprises the steps of blowing the soot only in the units 8 when the exhaust gas flows, and blowing the soots of the units 7, 8 when the gas does not flow.
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