In the specific type of dryer, the specific type of blade dryer will be studied and understood below, so that you can also know different dryers to broaden your knowledge. Therefore, this work is of practical significance. Everyone should take it seriously and carry out it. Then, know how to use and use the paddle dryer properly.
1. A paddle dryer, what kind of dryer is it?
A paddle dryer, which is one of the dryers, is professionally provided with a stirring slurry inside the device, so that the wet material can be fully contacted with the heat carrier and the hot surface under the stirring of the blade. And, in turn, achieve the purpose of drying. In terms of specific types, there are horizontal, vertical, and two-axis or four-axis. In addition, it can be divided into hot air type and conductive type.
2. The working principle of the paddle dryer
The working principle of the paddle dryer is:
On the heating medium of the dryer, there are steam, hot water, heat transfer oil, etc., and a rotary joint for introducing and discharging the heat medium is installed at the shaft end. The heating medium enters the jacket of the dryer casing and the inner cavity of the blade respectively to heat the material by heat conduction, thereby evaporating the water in the material to achieve the purpose of drying. When the material is dried, it is output from the discharge port.
3. The structure and characteristics of the paddle dryer
The blade dryer is structurally composed of two to four blade shafts, a base, a transmission portion, and a jacketed W-shaped housing.
The characteristics of the paddle dryer are mainly the following:
(1) Since the entire drying process of the material in this type of dryer is carried out in a closed environment, organic volatile gases, odorous gases, etc. generated during the drying process can be sent to the exhaust gas treatment device for treatment. It is then discharged to the atmosphere so that it can avoid polluting the air.
(2) The paddle dryer has a compact structure, a small footprint, and a large heat transfer area per unit volume, so that the basic investment can be effectively reduced and the equipment cost can be reduced.
(3) This kind of dryer has high heat energy utilization rate, because it can effectively reduce heat loss, so it can reach more than 90% in heat utilization.
(4) In the paddle dryer, the blade is a wedge-shaped blade, so it has the function of self-cleaning, and can effectively improve the heat transfer performance and heat transfer effect of the blade. In addition, since the blade can be reverse-rotated and alternately staged, and expanded and agitated, uniformity can be achieved in heat transfer, thereby improving the heat transfer effect of the paddle dryer and improving the drying of the dryer. effect.
