Most boilers produce steam to be used at saturation temperature; that is, saturated steam. Superheated steam boiler vaporizes the water and then further heats the steam in a superheater. This provides steam at much higher temperature, but can decrease the overall thermal efficiency of the steam generating plant because the higher steam temperature requires a higher flue gas exhaust temperature. There are several ways to circumvent this problem, typically by providing an economizer that heats ...

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