In the whole process of usingleather dryerto dry raw materials, it is carried out according to different inner and surface temperature differences and different temperatures. If the temperature control is not within the required scope, it will cause some safety accidents. In order to better prevent this kind of situation, as a practical operation staff, we should teach by words and deeds, Carefully complete each process flow without any carelessness or negligence. How to control the temperature difference and temperature of the inner surface of the barrel?

In order to better grasp the harm of the raw material layer of the dryer through the wind to the temperature raising rate and temperature uniformity of the raw material, under the condition that other standards will not change, a single factor experimental scientific research on the harm of the average value of the raw material layer through the wind to the temperature raising rate and temperature uniformity of the raw material layer is carried out to find a suitable category through the wind. During the experiment, the output power of the far-infrared electric heating tube of the dryer is 9kw, and the thickness of the raw material layer is 150mm. Accurately measure the temperature rise of raw materials at the near, medium and far parts from the far-infrared electric heating tube in the raw material layer.

According to the experiment, when the raw material layer ofleather machinerypasses through the wind for more hours, the raw material close to the electric heating tube increases the temperature faster; After heating gradually, the temperature difference between the inner and surface layers expands slowly. After heating for 20 seconds, the temperature rises slowly, and the temperature difference between the inner and surface layers decreases slowly with the increase of time. It is because when heating gradually, according to the basic law of negative quadratic, the kinetic energy of the radiation source decreases with the square meter of the distance between the radiation sources, resulting in a rapid temperature rise in the inner layer of raw materials and a large temperature difference in the inner surface layer; After heating for 20min, the temperature of the inner layer of raw materials gradually tends to the higher temperature that will be heated under this standard. At this time, the key of warm air is to carry out heat exchanger with the middle and high-rise and surface raw materials, resulting in the rise of the temperature of the middle and high-rise and surface raw materials again, and then the temperature difference between the inner and surface layers decreases slowly.

With the increase of the average value of the raw material layer through the wind, the temperature of the inner layer of the dryer increases more and more slowly, and the temperature difference of the inner surface decreases. The key is that when the wind is lifted, the efficiency of the heat exchanger is improved, and the cyclone immediately transfers the heat of the inner layer to the surface raw materials. Therefore, the temperature rise of the inner layer is more and more slow, and the temperature difference between the inner layer and the surface layer is reduced. Obviously, when the wind force is high, the heating of raw materials is symmetrical, but the temperature rise is very slow, which is unfavorable to the development of dryness. Moreover, for the thin and thick raw material layer, the organic waste gas brings more heat, low energy utilization rate and large power energy consumption. If the wind force is small, the raw materials in the inner layer are heated rapidly and are very easy to overheat. Therefore, in comprehensive consideration, the average value of raw material layer should be 0.25-0.45m/s through the wind range