May we introduce you to our new series stars? RooN-SI, the successor of our successful KBK series. The “SI” stands for smart injection – the mixing unit manufactured using metallic 3D pressure produces a gas-air mixture that is so precisely dosed that significantly less nitrogen oxides are produced than with conventional burners. The RooN-SI is our new standard burner for many applications.
In tests with the Gas and Heat Institute in Essen, Germany, we have demonstrated that our mixing unit can be used to build burners with NOx values below 30 mg/Nm³ at 800 °C furnace chamber temperature. The CO values in the flue gas are below 20 mg/Nm³, even in processes where there is an increased risk of CO formation due to low furnace chamber temperature. We achieve these values without secondary measures, such as the injection of urea into the exhaust gas, known as Ad Blue, SCR or SNCR, which is common in the automotive industry. Although secondary measures clean the exhaust gas of nitrogen oxides, they always cost additional resources. We make sure that nitrogen oxides do not even occur in the first place.
In the field of industrial burners, certain dimensions and sizes have become established across manufacturers. We orient ourselves on these sizes. Similar to replacing a light bulb with an energy-saving lamp, many burners in existing systems can therefore be replaced without having to replace the entire system.
Due to the precisely dosed gas mixture, the burner mouth of our burners remains up to 400 °C colder than with conventional burners. Since the burner mouth is usually embedded in the furnace wall, the hot burner mouth heats the furnace wall, not the process. The energy saved by the colder burner mouth is additionally available to the process.
The control range of a conventional burner depends on the flow velocity with which air and gas are mixed, the so-called mixing energy. If air and gas in conventional burners are reduced in the same ratio to each other, the flame will eventually go out, because air and gas are not sufficiently mixed due to the reduced mixing energy. The high number of our gas nozzles ensures that even at very low flow velocities, a combustible gas-air mixture is created and our burner does not extinguish.
Due to the precisely dosed gas mixture, the burner mouth of our burners remains up to 400 °C colder than with conventional burners. High temperatures lead to thermal wear of the hot components, especially the burner mouth. The reduced temperatures significantly increase the service life of our burners.
We optimize the mixing unit to your exact requirements using parameterized CAD models before printing. With an off-the-shelf series burner, for example, you can choose between 150 and 300 KW output. But what if your process requires 190 KW? Thanks to 3D printing, we can tailor the mixing unit exactly to your process at no extra cost. Thanks to our extremely small manufacturing tolerances of 30 µm (micrometers), we can, for example, make the gas nozzles much finer in size than would be possible conventionally with drilled gas nozzles.
The materials we use have been developed and certified for the aerospace industry. They have been used for several years in aircraft engines, power plant turbines and similarly loaded assemblies. The otherwise protracted field testing required for the introduction of new technologies has already been carried out by the aviation industry.
In addition to the 7 good reasons that all burners of the RooN series have in common, there is another argument that speaks for itself in this series: The burners can be operated without modification in systems with central recuperation with up to 600° air preheating, and this within the NOx values guaranteed by us. This is what we mean by future-proof.