Ash and coke on the boiler and heat exchanger raised the temperature of theflue gas in the boiler, which led to the results that the heat exchange rate was decreased and the temperature of process medium did not meet the requirements. .

• 锅炉及热交换器的结灰、结焦使锅炉排烟温度上升，导致换热效率下降，工艺介质温度达不到要求，并引起受热面发生高温腐蚀。