excess air coefficient
Thread Content
What is the meaning of the excess air coefficient? In operation, how is the excess air coefficient controlled?
The excess air coefficient is an important indicator of the quality of combustion. Excessively large coefficients lead to waste, while excessively small ones result in incomplete combustion.
Excess air factor: the ratio of actual air volume to theoretical air volume. It is usually denoted by: a, with a range of: 1.05 to 1.35. Control: It is generally controlled based on the oxygen content in the flue gas. Oxygen content determination: One method involves extracting the flue gas and measuring it using a magnetic flux oxygen analyzer. Another method is to use a zirconia oxygen analyzer for online analysis. The excess air coefficient is determined based on the measured oxygen content (with the oxygen content in air being approximately 21%).
If the excess air coefficient is too high, more heat is carried away by the air; if it is too low, combustion is incomplete； A preliminary judgment can be made based on the flue gas temperature