Coal Mill Fire Detection Early detection of fires in coal pulverising mills is essential to avoid catastrophic damage to plant and to avert the threat of injury to personnel. Detection and measurement of carbon monoxide levels produced by combustion within the mill is a proven method of detection of coal mill fires. Any such system must be capable of detecting CO in the mill whether the mill is idle or in operation and must do so with absolute integrity, for long periods and with minimal maintenance. CO Analysing System Because of the hostile environment and dust-laden nature of the gas, conventional extractive systems are generally inadequate in conditioning and transporting the gas prior to analysis. The CODEL system samples the gas content of the mill outlet through a steel sintered filter mounted in the wall of the mill outlet duct. infrared gas analyser with stainless steel measurement chamber low maintenance operation high dust loading operation automatic zero calibration remote data display unit; data in ppm Coal Mill - CO Gas Analysing System Product Data Sheet Total Solutions - Total Confidence Doc i/d : 080019 Issue : A Rev. : 4 Date : 17/3/09 © 2007 CODEL International Ltd. We reserve the right to modify designs without prior notice. The sample gas requires no pre-conditioning and is carried by a sample line and pump to a measurement chamber equipped with a compact infrared gas analyser; the measurement chamber is trace-heated to avoid corrosive condensation. Integral valves provide automatic calibration and filter cleaning routines. The CODEL mill fire prevention system incorporates a rugged, industrial-quality analyser, close-coupled to a dedicated point of analysis, to provide measurement confidence in this demanding application. Alternative Mounting Arrangement Sample Line (maximum length 20m) Air Outlet Compressed Air In 48V DC Input Outputs Comms to DDU DDU Measurement Chamber Transmitter (Tx) Receiver (Rx) Sintered Filter & Mounting Flange Assembly

Operating Principle Span Accuracy Repeatability Calibration Calibration Period Response Analogue Output Contact Outputs Serial Digital CODEL International Ltd. Station Building, Station Road Bakewell, Derbyshire DE45 1GE England Tel: +44 (0) 1629 814 351 Fax: +44 (0) 8700 566 307 e-mail: [email protected] web site: www.codel.co.uk Distributor : System Layout Specification Power Requirement Compressed Air Requirement Display Keypad Construction Compliances EMC Low Voltage Coal Mill - CO Gas Analysing System CODEL 600mm 600mm 300mm Front Rear Alternative (remote) mounting holes for 4 x M8 bolts...