Fine particle agglomeration technique is an effective method to control the air particle pollution

and acoustic agglomeration is considered as one of the most promising techniques.In this study

large size lime seed particles were introduced to the acoustic agglomeration experiment at low frequency (1000—2000 Hz).The distribution of fine particles was measured online by electrical low pressure impactor (ELPI）to investigate the effect of lime seed particles on acoustic agglomeration.The results show that the acoustic agglomeration with lime seed particles can attain higher agglomeration efficiency

with the best efficiency of 70.5%.For the cases with low acoustic agglomeration efficiency

the introduction of lime seed particles improves the agglomeration efficiency significantly

and the highest increment in agglomeration efficiency reaches 15.5%.The agglomeration efficiency depends on the sound frequency

sound pressure level

residence time

amount and size of seed particles.The introduction of lime seed particles can expand the “frequency window” and give a better agglomeration effect even at lower sound pressure level

and decrease the dependence on the size of agglomeration equipment

which improves the performance of acoustic agglomeration and reduces the energy consumption.The results show that the amount of seed particles should be appropriate and excessive seed particles will reduce the agglomeration efficiency.The size of seed particles should be moderate

otherwise the improvement of agglomeration efficiency is limited.