Fouling prevention orders in May: Acoustic cleaning for Biofuel and WtE

May resulted in orders of infrasound cleaning for four boilers within the biofuel and waste incineration sectors. Two of these orders are for smoketube boilers in Sweden burning biofuel and one order is for cleaning the back pass, i.e. economizer and air preheater, of a large CFB boiler in Sweden burning recycled wood. The operator of the CFB boiler ordered infrasound cleaning for this new built boiler, being taken in operation 2020, after experiencing the benefits of infrasound cleaning on their existing WtE CFB.

The fourth order is for the air preheater on a waste to energy boiler in Germany. This order was also taken partly based on good experience of infrasound. This client has been operating infrasound cleaning on a coal fired CFB for more than 20 years.

General about infrasound (low frequency sonic cleaning)

Typical applications for Infrasound cleaning are economizers, air preheaters, catalysts and smoke tube boilers. Our optimizing rebuild of steam soot blowing is used for saving soot blowing steam or increasing cleaning effect, mainly in warmer areas such as superheaters.

Some of the benefits our cleaning systems:

  • Reduced steam consumption for steam soot blowing. Saved soot blower steam is used for increasing heat or electricity production.
  • Lower fuel consumption. Cleaner tubes means increased heat transfer and efficiency.
  • Lower and more stable differential pressure. Infrasound cleaning reaches areas that are not accessible to conventional soot cleaning systems. This means higher availability of the boiler and lower load on ID/FD fans.
  • Fewer and shorter outages for manual cleaning. With improved cleaning effect you can obtain higher availability and fewer man-hours spent.
  • Increased lifetime of heat exchangers. By reducing or eliminating steam soot blowing or shot cleaning, the lifetime of heat exchangers is prolonged. Infrasound cleaning is a non-abrasive cleaning method that does not wear on heat exchange surfaces or catalyst elements and does not contribute to corrosion or erosion. Using our optimized steam soot blowing also reduces wear since steam is supplied only half the time.

Fouling prevention

Infrasound cleaner on smoke tube/ fire tube boiler