Real-time online thermographic analysis
June 2012
Temperature Measurement
The video based D-VTA 100-10 thermography system from Durag supplies online information directly from the combustion chamber to assist the operator in adjusting the complete combustion process optimally. The system provides a real-time video image as well as a real-time online thermographic analysis of the temperature distribution inside the combustion chamber.
The thermographic system is an optical pyrometer based on advanced video data processing technology. A high quality picture with a wide angle of view and a small sensor diameter are obtained with a boroscope lens. The CCD camera is mounted in the cold part of the lance, thus allowing sensitive equipment to be mounted outside the combustion chamber for continuous use at high temperatures. A sapphire lens and air flushing are used to protect the boroscope tip from slag and ash particles.
In addition to the video image, the system allows thermal analysis of the spatial temperature distribution inside the combustion chamber. It can determine the temperature within freely definable areas along the region of interest (ROI) and line of interest (LOI). The system is also capable of continuous parallel temperature analysis in all ROIs with continuous display of the absolute temperature on the screen. Other capabilities include the ability to perform continuous temperature analysis along all LOIs with continuous display of the absolute temperature profile through the combustion chamber, and the detection of the actual thermal position of the combustion zone.
To guarantee the largest and unobstructed observation range, the sensors, along with their optical systems, are directly moved into the combustion chamber. To withstand high temperatures between 700°C and 1600°C (typical for these furnaces) the sensors are air or water cooled. All parts which may be affected by the flue gases are made of special stainless steel to cope with the chemical reactions and high temperatures of the flue gas.
For more information contact Colwyn Savings, OEN Enterprises, +27 (0)11 675 4447, [email protected], www.oenenterprises.co.za
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