Fire and Explosion Prevention in Coal Pulverizing Systems

tration of coal in air below which an explosion does not occur), but do not have an upper explosive limit as long as the coal/ air mixture can be considered a cloud In practice, a fire occurring during normal pulverizer operation does not result in an explosion The rich coal/ air mixture has been shown to absorb the heat of the

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During 1981 the Electric Power Research Institute (EPRI) began a research project to study pulverized coal fires and explosions in the US utility industry via an industry wide survey and explosion experiments The survey indicates that explosion events are occurring at a rate of approximately one every three years for each boiler The trends show that although coal type has a positive

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APPLICATION PROFILE Fire Protection Technologies

can use coal safely Coal has been the fuel of choice for the cement industry around the world for many years and the technology is well developed to prevent fires and explosions EXPLOSIONS IN CEMENT PLANTS • Coal is fed into a pulverizer where it is crushed and dried using hot air at approximately 300°F The pulverized coal is then

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Undetected fires are a major cause of mill explosions A report by EPRI (in the USA), claimed there was at least one pulverizer explosion every day in the USA It is also known that fires are on the increase In order to deal with the increasing threat of fires and explosions, fire detection early warning systems are proving vital to plant

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