This fire accident usually occurs in the drying chamber interior,it is difficult to discover and prevent for the operator.Once the drying machine fires, it causes sand burning and losing its use value; or even scraps the sand dryer machine, this will cause great economic loss of the sand library and bad social impact. To make the hidden trouble of fire nipped in the bud, not adding a temperature alarm system is not feasible.

Virgin sand, when the drying medium temperature or ambient temperature, sand moisture before drying and other parameters for long time vary greatly,the operator still can not change the original speed of sand machine. When the motor temperature is too high or low, we must seek the reason of temperature deviation to adjust the temperature to the best state.

Rotary dryer in working process has easily temperature deviation, experts analyze the reason of sand dryer temperature deviation.Expansion joint of heat exchanger and fire-proof walls,heat exchanger end plate and the expansion joint, the end plate and heat exchange tube, heat exchanger and heat exchanger, long-time burning, corrosion and aging will generate holes and cracks, if the pressure of drying medium outside heat exchange tube is less than flue gas pressure inside heat pipe, the fire in flue gas through the holes and cracks will be sucked into the drying medium, and then as the drying medium is brought to the drying machine,causing the sand firing.

As we all know,sand drying machine is a good drying equipment in mining industry. And every part of rotary dryer can affect the production of rotary dryer. For the all parts of rotary dryer machine, the rotary dryer engine is the most important part for rotary dryer working. So analysis the engine part become an important work. Here we analysis the importance of the engine temperature for rotary drum dryer production.

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