When an afterburner is used on a shuttle kiln in needs to be designed and sized carefully to be sure to remove the organic volatiles during the specific times that they are released from the product.
The afterburner normally operates at 700°-1000°C and it is important that the retention time in the afterburner is enough to remove the organics to the required level.
The process often starts slowly as soon as the kiln temperature starts to increase; it reaches a peak between 300°C and 500°C and then reduces until all the organics are removed by 700°- 800°C. In a shuttle kiln it is now possible to turn off the afterburner to save fuel.
As the energy needed heat the exhaust to the required temperature is high, NUTEC Bickley often include a heat exchanger to pre heat the exhaust flow and also to capture as much waste heat as possible for pre heated combustion air for both the kiln and the afterburner. This heat recuperation improves the overall efficiency of the system.
