Experimental Study Of Transmission And Water Treatment Performance Of Ultrasonic

In the industrial heat transfer equipment, fouling not only cause extremewaste of energy but also cause the heat transfer efficiency decreases seriously, thusstudy on the anti-fouling technology will have very important practical significance.With the development of science and technology, ultrasonic anti-fouling technologygradually spring up and was focused by more and more people. This study includeultrasonic transmission theory in the solution and water treatment performance ofultrasonic. The main results are as follows.First of all, micro differential pressure method is adapted to measure theultrasonic transmission and study the ultrasonic pressure、intensity and powerdistribution in the ultrasonic field through the water and CaCl₂solution. As a result,the ultrasonic pressure、intensity and power decrease with the trend of axial andhorizontal abscissa. Ultrasonic change as exponential variation with the trend of axial,with the trend of horizontal abscissa, ultrasonic pressure、density and power isstronger in the core and lighter at the edge and change as two function. At the sametime, the solution density has more important influence to the ultrasonic transmission,more high solution density, more faster decrease.Secondly, we do the ultrasonic water treatment experiment with the Ca（HCO₃）₂and Mg（HCO₃）₂solution which are different density. We analyze the effect factorswhich include the solution temperature、hardness and ultrasonic effect in the form offouling.As a result, the treatment experiment for the fouling show that ultrasonic canspeed up the production of nucleation of calcium carbonate, promote the formation ofcalcium carbonate, reduce the hardness and decrease the electrical conductivity,especially,the ultrasonic can cause more rapid when the solution has more initialhardness. At the same time, the temperature can also speed up the production ofnucleation of calcium carbonate. But in the quasi-static treatment, the ultrasonic cannot significantly effect in the form of nucleation of magnesium carbonate.