pulverizer systems

Direct fired systems have exhibited half the explosion frequency of bin storage systems. Because flue gas is used as the pneumatic transport medium in bin storage systems, the plants may assume an inert gas is present. However, load changes, leakage in the system, or malfunctioning dampers can increase oxygen concentrations to levels suitable for explosions.

The experiments show that the size relationship of pulverizer, classifiers, crushers, and fans to coal pipes is crucial in explosion origin and growth. The relative sizes determine whether or not a detonation can occur as well as the magnitude of the resultant forces. Detonation evolution requires a change in volume and must originate in a pulverizer system component other than a coal pipe. While a fire is located in a coal pipe, it cannot trigger a detonation. However, if the fire moves and enters a piece of equipment of different size and venting characteristics, then the probability of an explosion increases. The relocation of a fire to other components of pulverizer systems such as the classifier. Crusher. Fan, or pulverizer can create a detonation.

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