AV Sootblower has developed the next generation of sonic soot blowers. Much of the development work has been spent on finding the ultimate sound wave for sonic soot blowing. Tests have shown that the shape and frequency of the sound curve is critical. An optimized frequency and sound wave could provide up to 90 times more energy than traditional sonic soot blowing when it hits the soot particle and blows it away.
How sonic soot blowing works
Soot cleaning is performed using low frequency, high energy sound pulses. Sonic soot blowing acts in two ways. The blast from the sound wave hits the coating and vibrates/shakes it loose. The sound wave’s oscillating movement along the surface reduces the boundary layer above the dust-coated surface. This allows the gas stream to pass much closer to the surface and ‘blow’ so that the particles can be transported away. The cleaning efficiency diminishes at high temperatures and reduced viscosity in the air. It is therefore desirable for the resonator to be able to change frequency so as to hit the dust particles with maximum force. Low frequency sound is 3-dimensional and bounces in all directions, enabling it to reach the whole cavity of the application. The range depends on the frequency of the sound pulse.
Our products refine an old concept into a high technological, high performance product.
· Infra Dynamic – dynamic infrasound that covers 10 – 50 Hz automatically during operation
· Up to 90 times greater pressure gradient when the sound wave hits the soot particles
· Low harmonic sound levels outside of the application < 70 dB(A)
· Omnidirectional sound – covers and cleans all the boiler surfaces with a long action radius (up to 15 metres)
· Cleaning every other minute
· Low operational cost, roughly < $ 600 a year
· Fire tube and water tube boilers
· Electrical filters
· Air preheaters
· Gas flues