THE IMPACT OF COMBUSTION CONTROLS

摘要

Combustion controls regulate a fuel-fired system's air and fuel inputs to maintain the air/fuel ratio within the limits that are required for proper combustion. These ratios are maintained throughout the operating range as specified by the burner manufacturer for the application, in accordance with demand. When comparing the various control systems available, though, how do you know which system will prove most beneficial for your operations? Do you know if your current system is up to date or accurately controlling the combustion process for your equipment? Learning more about combustion controls can help you sort through these questions as well as improve the operation of your fuel-fired systems. Fuel and air must be delivered to the burner in just the right proportions to produce safe and reliable combustion with the desired amount of excess air. When a burner is operating at the desired air/fuel ratio, it is said to be tuned. This is typically the point where the equipment operates at near peak efficiency, with the best possible emissions for the given burner, and where all of the fuel is consumed. The flame will be stable, and the volume of exhaust gases (and therefore emissions) will be minimized. The exact flame characteristics will depend upon the burner type, but a typical flame will be conical in shape and colored blue with pink or orange tips. If not tested and maintained, combustion controls can cause a system to drift off-ratio.