| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam system of a steam air preheater outlet air duct for enabling the temperature difference of the element at the low-temperature end of a regenerative air preheater to be reduced. SOLUTION: Though air for combustion to be supplied to a boiler furnace 1 consists of the mixed air between the heat air having passed a regenerative air preheater 5 and the cold air having bypassed the regenerative air preheater 5 and passing through a duct 11, an air agitation means is installed in the air duct 4 at the outlet of a steam type air preheater so as to reduce the temperature difference within the air duct 4 at the outlet of the steam air preheater, whereby the temperature difference of the air for combustion can be reduced. This way, the suppression of the corrosion of an apparatus such as the low- temperature element, etc., of the regenerative air preheater becomes possible. |
