Accident Handling 39: What are the causes of damage to the economizer in a circulating fluidized bed boiler?
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What are the causes of damage to the economizer in circulating fluidized bed boilers?
1. Wear caused by flue gas and dust particles, 2. Flue gas corrosion, 4. Unqualified water quality, 5. Water hammer, 6. Manufacturing defects, installation defects.
I agree with the correct answer above; moreover, the material quality is substandard
The reasons for the damage to the economizer in circulating fluidized bed boilers are: (1) Since the economizer tubes are exposed to a high-concentration flue gas environment, their windward surfaces are prone to wear. (2) The material of the economizer tubes or the installation and maintenance procedures are substandard. (3) The economizer recirculation valve was not opened in time after the water supply was stopped. (4) Debris is blocking the pipe, preventing water circulation within it. (5) The water supply quality is substandard, resulting in scaling and corrosion inside the pipes.
The points mentioned on the 4th floor are quite comprehensive; they include factors such as material quality, improper installation, incorrect operation, chemical corrosion inside the pipes, and wear and corrosion outside the pipes.
Dew point corrosion in the economizer is very critical.