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Derek Stuart, Global Product Manager – Power, looks at why early detection of potential spontaneous heating and combustion locations in coal milling is essential to plant safety.

All coals oxidise during storage, but sub-bituminous coals (such as those from the Powder River Basin), due to their friability and porosity, are especially prone to spontaneous combustion. The increasing use of sub-bituminous coals throughout the world has therefore increased the risks of grinding mill incidents. Avoiding spontaneous combustion in the milling process is essential for personnel safety and asset protection.

The greatest risk of spontaneous heating and subsequent fire occurs when the mill is shut down under load, as this leaves a large amount of pulverised fuel inside a hot mill. The large surface area of the pulverised coal and the high temperature inside the mill can lead to the rapid oxidation of the coal. This results in further heat build-up and the potential for a fire.

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AMETEK Land

AMETEK Land (Land Instruments) is the world’s leading manufacturer of monitors and analysers for industrial infrared non-contact temperature measurement, combustion efficiency and environmental pollutant emissions

AMETEK Land (Land Instruments) is the world’s leading manufacturer of monitors and analysers for industrial infrared non-contact temperature measurement, combustion efficiency and environmental pollutant emissions.

Through our trusted range of leading-edge technologies, we are chosen the world over to deliver the highly accurate measurement solutions that precisely meet every customer’s process needs.

Our comprehensive product range includes:

– Fixed Spot Non-Contact Thermometers / Pyrometers – Flexible solutions, customisable for diverse processes and specialised applications.

– Portable Non-Contact Thermometers– Trigger-operated for easy use, our handheld thermometers provide spot temperature measurements with precise target viewing and on-board data storage.

– Fixed Thermal Imagers & Line Scanners– Setting the industry standard for performance. Backed by advanced software support, they supply the information you need to keep your process running safely and efficiently.

– Calibration Sources – A comprehensive range of blackbody calibration sources enabling high-precision calibration of radiation thermometers under on-site and laboratory conditions.

– Combustion Efficiency Monitors – We offer precision measurement solutions to measure oxygen, carbon monoxide and sulphuric acid dewpoint, which can help improve combustion efficiency, lower energy use, reduce emissions and prevent plant corrosion.

– Opacity and Dust Monitors– The most advanced range of opacity, dust and particulates monitors available, use patented technology to deliver highly accurate results. With no moving parts, they combine high reliability with low maintenance.

– Portable Gas Analysers – Offering up to nine gas measurements on a single analyser, we have solutions for all combustion monitoring and environmental compliance.

– Carbon Monoxide Detectors – Providing early warning of combustion in process and storage areas, our highly sensitive CO detectors monitor the entire process. This gives the best chance of early detection, allowing rapid action to prevent fire.

– Specific Industry Applications – We design systems specifically to solve critical temperature measurement problems industrial applications. Our specialised solutions provide optimised performance in challenging processes.

With unrivalled applications knowledge, choosing AMETEK Land ensures the highest standards of process safety, process control and product quality are reached.

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