CTL Sliding Sleeves for Burner Air Control
One of CTL's products is the retrofit SLIDING SLEEVE for single or dual register
burners. Most older burner designs use the burner register vanes to perform two major
jobs: control the quantity of air flow and control the combustion air turbulence. A vaned
register is only capable of doing one of these at a time, so when you have the right
"spin" on a burner you typically do not have the right amount of air. CTL's
sliding sleeve provides the means to balance windbox air between the burners without
changing the turbulence crated by the burner's register vanes.
The sliding sleeve can be retrofit to any wall-fired burner design. The sleeve rides on a trolley in the windbox and slides over the burner register, opening to provide the proper balance of air flow between burners. This leaves the register vanes free to control the burner air turbulence. The arrangement can be set up for manual or automatic operation, depending on your needs. An air measurement device is used to quantify the amount of air flow in each burner during the commissioning of the sliding sleeves.
CTL has retrofit sleeves on many boilers throughout the United States. In these applications the sliding sleeves provided for an air flow balance of +/-5% per burner. Considering that the uncontrolled air balance ranged up to 75% difference in air flow from burner to burner, the air balance provided by the sliding sleeve has solved many combustion-related problems.