There is a certain amount of air inside the mill in the production process, and it is helpful to the production of the mill when the air volume is appropriate, but once the air volume exceeds the required amount, it will have certain side effects on the production of the mill. Therefore, in the process of production, the operator should always pay attention to the internal operation of the mill, and it is necessary to eliminate the excess air volume in the mill in time. So where does all this extra air come from? Today Xiaobian will discuss with you.
First of all, the word negative pressure is more common in life, especially in the process of people breathing, in fact, there is such a negative pressure state. The definition of negative pressure is: "The absolute pressure (pressure) of the air flow is less than the atmospheric pressure (pressure) of the same elevation outside the well or outside the duct, and its relative pressure (pressure) is negative." For the mill as a loop production system, there is negative pressure for a period of time, but when the equipment in the negative pressure area is not tightly sealed, air will be sucked into the mill.
Then, in the process of processing materials, because the material itself has certain pores, it will bring a part of the air into the inside of the mill. In addition, due to the large amount of friction between the material and the parts of the mill, the temperature of the material rises, and some water existing in the original material will be evaporated to form water vapor.
Finally, due to continuous production, the temperature inside the mill will continue to rise, which will lead to gas expansion.
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