Burners 

Burners that set the standards
Innovation and technology are the keys to Callidus burners. For over two decades, our team has been on the leading edge in designing burner equipment. The burner design group has worked in cooperation with our customers to develop the technology and solutions to some of the greatest challenges in the reduction of NOx. Callidus set the standard with the patented low emission (LE) burner achieving NOx levels of 20 ppm. More recently, Callidus again demonstrated its technical expertise and leadership with the introduction of the next generation Ultra Low NOx CUBL burner

The Callidus Ultra Blue (CUB) reduces thermal NOx in the combustion zone, achieving 10 -15 ppmv in most natural draft fired process heaters.
In a Conventional burner, the fuel and air needed for combustion are mixed in the throat of the burner where ignition and oxidation reaction occurs. There is a single flame zone. In contrast, Low NOx burners typically use multiple flame zones.
Low NOx burners incorporate a mechanism for reducing the peak flame temperature relative to premix and conventional burners. This reduction in peak flame temperature results in lower NOx emissions.
In a Premix burner, the fuel and air needed for combustion are drawn together and mixed prior to discharge from the burner tip.
Among the many various process heater types and configurations, there are a few which are so unique in design and required performance that a very specialized burner is required. One of our areas of expertise at Callidus is the development of high-quality burners for these unique furnaces.
Ultra Low NOx burners incorporate two key technologies to lower burner peak flame temperature and NOx emissions. These technologies include combustion Staging and Flue Gas Recirculation.
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