Experimental study of influence characteristics of flue gas fly ash on acid dew point

[摘要] The long-Term operation experience of a large number of utility boilers shows that the measured value of acid dew point is generally lower than estimated value. This is because the influence of CaO and MgO on acid dew point in flue gas fly ash is not considered in the estimation formula of acid dew point. On the basis of previous studies, the experimental device for acid dew point measurement was designed and constructed, and the acid dew point under different smoke conditions was measured. The results show that the CaO and MgO in the flue gas fly ash have an obvious influence on the acid dew point, and the content of the fly ash is negatively correlated with the temperature of acid dew point At the same time, the concentration of H2SO4in flue gas is different, and the acid dew point of flue gas is different, and positively correlated with the acid dew point.

[发布机构] Guangdong Electric Power Research Institute Energy Technologies Ltd, China^1;School of Energy and Power Engineering, North China Electric Power University, Baoding, Hebei, China^2

[关键词] Acid dew;Estimation formulae;Experimental devices;Measured values;Operation experiences;Smoke conditions;Utility boiler