Analytical Instrumentation & Environmental Monitoring


Coal fire detection system

November 2010 Analytical Instrumentation & Environmental Monitoring

Codel International has introduced a new coal fire detection system into the market. The early detection of fires in coal handling systems on coal fired power stations is essential to prevent catastrophic damage to expensive plant and serious injury to personnel. The most reliable and accurate method of detecting coal fires or smouldering is to monitor the carbon monoxide levels within coal handling plant areas such as silos and mills to detect rapid increases in concentration of the gas. The system is designed for use on coal silos, coal mills, coal bunkers, grinding plants, coal bag houses and conveyors.

The unit features a rugged, infra-red cross-correlation analyser capable of measuring rapid changes in CO concentration accurately with the minimum of maintenance required. The analyser can be re-calibrated automatically using integral valves to ensure ongoing drift free performance.

The CO monitor samples the gas content of the critical area through a non-intrusive steel sintered filter mounted in the wall of the mill outlet duct or hopper. This removes the need for intrusive sampling probes which are prone to wear and are expensive to replace. Furthermore, the filter is back flushed with compressed air at regular intervals to ensure an uninterrupted flow of sample gas and to minimise maintenance.

Extensive field trials of the system in the UK, Poland and China have shown the new monitor to be extremely reliable, accurate and to require minimal maintenance.



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