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29. The products of combustion of marine fuels include sulfur dioxide, which, when combined with
water vapor, forms acids such as the sulfurous acid and sulfuric acid. These acids cause cold-end
corrosion if allowed to condense on boiler components of flue-gas ducting. Therefore, in order to
prevent the cold-end corrosion, which action is not to be taken?
(A) To ensure the temperature of exhaust gas is always above the condensation temperature level.
(B) To install more heat exchangers in the flue-gas ducting so that the temperature of exhaust gas
is further reduced.
(C) To prevent any chemical process that formulates the acid within the boiler components of fluegas ducting.
(D) To ensure there is no water-vapor condensate formed within the flue gas by controlling the flow
temperatures in the flue-gas ducting.
答案：登入後查看
統計： A(115), B(405), C(128), D(102), E(0) #3247644
統計： A(115), B(405), C(128), D(102), E(0) #3247644
詳解 (共 2 筆)
阿峰
#7450874
The products of combustion of marine fuels include sulfur dioxide, which, when combined with water vapor, forms acids such as the sulfurous acid and sulfuric acid. These acids cause cold-end corrosion if allowed to condense on boiler components of flue-gas ducting. Therefore, in order to prevent the cold-end corrosion, which action is not to be taken?
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船舶燃料的燃燒產物包含二氧化硫，當其與水蒸氣結合時，會形成亞硫酸與硫酸等酸類。若允許這些酸類在鍋爐組件或煙道（Flue-gas ducting）中凝結，將會造成冷端腐蝕（Cold-end corrosion）。因此，為了防止冷端腐蝕，下列哪一項措施「不應該」被採取？
(A) 確保排氣溫度始終保持在露點（凝結溫度）之上。
(B) 在煙道中安裝更多的熱交換器，以便進一步降低排氣溫度。
(C) 防止在鍋爐組件或煙道內發生任何形成酸類的化學過程。
(D) 藉由控制煙道內的流體溫度，確保煙氣中不會形成水蒸氣凝結水。
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