Theoretically speaking, the drying process of materials can be divided into three stages: heating up, constant speed drying and decreasing speed drying. The rotary vane vacuum pump guarantees the balance of heat load of the dryer and the stability of the thermal system, so that the moisture content of the dried materials is uniform, so that the single-stage rotary vane vacuum pump hot blast stove can provide heat, so as to improve the service life of the dryer and the double-stage water ring vacuum pump of the electric dust collector.

On the other hand, the exhaust gas temperature can be easily controlled and controlled. This kind of lifting plate can quickly push the double-stage water ring vacuum pump into the constant speed drying stage from the heating and heating stage to the constant speed drying stage. At this stage, the material forms a thin and uniform material curtain, which increases the battle area between the material and the hot air flow.

In order to extend the service life of the feed pipe of the dryer, the inclined pipe can be changed into the straight pipe and the lower trough plate situation. Some have saved fuel, but increased power consumption; others have improved the thermal efficiency of slide valve vacuum unit, but the output has not been able to keep pace with each other. According to the monitoring of the trading agency, the domestic iron ore production has also been increasing.

The production practice has proved that the same drying production line, after the skill reform, can make the output of the dryer rise significantly, the energy consumption is significantly low, the final moisture of drying single-stage rotary vane vacuum pump is guaranteed, and the comprehensive benefits are very considerable. However, due to the low one-time investment of rotary vane vacuum pump, it was accepted by most small and medium-sized enterprises before its launch.

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