Most conventional air systems suffer from inadequate combustion and poor gas flow patterns in the lower furnace, resulting in poor heat transfer and high carry over.
This causes many recovery boilers to plug their superheater or generating bank sections, resulting in reduced production and costly downtime for cleaning.
Anthony-Ross Company solutions improve recovery boiler runtime - typically achieving 12 months without a waterwash.
Pluggage is usually caused by excessive carry over and high upper furnace temperatures. If the gas temperatures are too high (above the “sticky ash” temperature), the ash carry over fuses to the boiler tubes and is very difficult to remove by sootblowing. Anthony-Ross can help you to extend the run time of your recovery boiler by correcting the root cause of the problem: poor combustion air system and liquor spray system performance.
The Anthony-Ross Stacked Air System™ (patent pending) greatly improves the mixing and combustion in the lower furnace, resulting in improved heat transfer to the furnace walls and reduced carry over.
~ Improved heat transfer absorbs some of the heat from the gases, reducing upper furnace temperatures below the “sticky ash” temperature. This improves the ability of the sootblowers to remove the ash.
~ The improved gas flow patterns entrain far less carry over than conventional air systems, resulting in less smelt and ash traveling to the upper furnace.
To get the most benefit the black liquor spray system must be integrated into the combustion air system. Anthony-Ross Company tailors the liquor spray pattern to match the combustion air system, optimizing combustion in the furnace for minimal carry over and improved temperature profiles throughout the furnace.
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