Agglomeration removal of fine particles at super-saturation steam by using acoustic wave

An experimental installation was set up for investigating experimentally agglomeration removal of dust particles under various steam super-saturation degrees by using acoustic wave.The results show that the acoustic wave entrainment coefficient for these fine particles goes up with increase of the super-saturation degree,leading to improvement of the removal efficiencies.When the super-saturation degree is below 1.0,the total removal efficiency of dust particles has almost no increase with it,and is quite low,about 10%.However,when the super-saturation degree is bigger than 1.0,the total efficiency can be promoted and goes up rapidly with the increase of super-saturation degree.For example,when the super-saturation degree increases from 1.0 to 1.5,the removal efficiency rises about 50%.The removal efficiency of dust particles increases also with rising sound pressure level.Even if at high sound pressure steam condensational growth can not occur yet at 0.3 of low steam super-saturation degree,hence,only low removal efficiency,less than 20%,is observed.But at 1.2 of high steam super-saturation degree,the removal efficiency can be significantly improved,for example at 130dB of lower sound pressure level,about 70% high efficiency can be obtained.These facts indicate that removal of dust particles can be effectively improved if acoustic wave is used,i.e.their agglomeration with steam can be enlarged.