| 摘要 |
The burner is in the form of a muffle burner in order to complete combustion before entry of the flue gas into the duct and thus create a zone of intense heat at the forward portion of the duct. Open-ended tubes are positioned in the duct transverse to the flue gas flow to conduct the water therethrough while the first few tubes have the feed water injected therethrough from a source of feed water.
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