Knowledge

Here our soot cleaning solutions are described and compared to other cleaning sloutions.

Why infrasound is more efficient than audible sound in preventing soot build-ups

The video below shows how the grade of turbulence increases with lowered frequency. Increased turbulence reduces the areas with low gas velocity.

White paper

Comparison of infrasound and steam soot blowing as soot cleaning methods in boilers

Steam soot blowing is a cleaning method best suited for cleaning of heat transfer surfaces in high temperature areas such as superheaters, where deposits are created due to melted components in the ash. In economizers, air preheaters, catalysts and other parts of the boiler where the flue gas temperature is lower infrasound can be used for eliminating or at least reducing drastically the need for steam soot blowing, which means big savings due to the following disadvantages with steam soot blowing: Read the white paper here

 

Why infrasound is more efficent than audible sound in preventing soot build-up in boilers

Infrafone’s infrasound technology used low frequency sound, infrasound, around 20 Hz to prevent soot build-up on heat transfer surfaces and other surfaces. The infrasound has several advantages compared to audible sound when it comes to cleaning a surface. Read about sonic horns versus infrasound technology, click here

 

Infrasound for duct cleaning

Thanks to the infrasound’s unique properties, infrasound has proven to be a powerful tool in controlling build-up in ducts, soot pockets and silos. The infrasound’s properties makes it possible to clean all types of ducts, regardless of its dimensions. Read more and download the whole report.

 

Reducing emissions using infrasound

In the SCR, economizer, air preheater, ESP or other parts of a boiler, where the flue gas temperature is relatively low, Infrasound cleaning is a method that can result in substantial economical savings and reduced emissions. In this white paper we focus on the emissions, which can be reduced e.g by replacing steam soot blowing or by keeping heat exchangers, SCR or ESP cleaner. Download the white paper.

 

Infrasound cleaning for catalysts (SCR)

To meet future emission levels it is important to keep the catalyst as clean as possible to maximize its efficiency. In catalysts, where the flue gas temperature is relatively low, Infrasound soot cleaning is a method that can result in substantial savings due to its physical properties. The major advantage is that the infrasound technology keeps the low temperature applications cleaner due to its global cleaning effect compared to conventional cleaning methods since these methods only provide a local cleaning effect. Read more here

 

Infrasound acoustic cleaning for economizer

Infrafone Sonic Cleaning can be used to keep economizers clean in different types of boilers, using different types of fuels. By applying Infrafone Sonic Cleaning on economizers the use of conventional cleaning systems can be reduced or even eliminated. Read the white paper here

 

Infrasound cleaning technology for Rotary (Ljungström) air preheaters

The operation and maintenance costs of the conventional steam soot blowers for rotating air preheater are relatively high as they consume valuable steam for operation, they only provide a local cleaning effect and will therefore need regular stops for manual cleaning. Read the report here

 

Comparison of infrasound and shot cleaning

Shot cleaning uses shots or clips, made of steel or aluminium, which are dropped into a heat exchanger and thereby removes deposits from the heat transfer surfaces. For economizers, air preheaters and other areas with rather low flue gas temperature, and thereby dry deposits, infrasound technology is a better choice. Read more about shot cleaning versus infrasound cleaning here

 

Differences between infrasound and high pressure air as a soot cleaning method

Infrasound is oscillations in gas (air) so both high pressure air soot blowing and Infrasound technology is based on the principle of keeping a surface clean by exposing it to air moving with high velocity. There are however several large differences between compressed air soot blowing and Infrasound technology. Read more here

Business Case

Read about a more profitable biomass-fired boiler

This Business Case describes how the profitabillity for a biomass-fired boiler was increased by lowering the fuel cost and reduced wear of the boiler when a solution based on infrasound technology was implemented. This was done at the same time as the ekonomizer was changed for the third time for this power plant. Read more about the savings that the customer realized. For downloading the report please click here.

Savings for a waste-to-energy plant

This report describes an example of how the profitability for a waste-fired boiler was increased by lowering the fuel costs and reduced wear of the boiler when a solution based on infrasound technology was implemented. Read more about what the result was and the cost savings. Read more here

Increasd profits for a coal-fired boiler!

This report describes an example of how the profitability for a coal-fired boiler was increased by lowering the fuel costs and reduced wear of the boiler when a solution based on infrasound technology was implemented. Read more about what the result was and the cost savings. Downloading your report here

Publications

Report about soot cleaning methods from the Swedish institute Värmeforsk Feb 2009

The ÅF made together with the Swedish institute Värmeforsk year 2009 a report that would describe different soot cleaning methods at black liquor recovery boilers, and there availability and efficiency. The report describes two of Infrafones references: Korsnäs AB at Frövi and Smurfit Stone at Stevenson, Alabama. The report is only available in Swedish, click here!

Case Studies

If you are interested in reading Case Studies about our references click here.

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