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Paddle drier form and classification
Paddle drier form and classification
Set in a desiccator various structures and shapes of blades to agitate the material to be dried, so that the material in the mixing paddle flip, continuing with the dryer or heat carrier contacts the wall heat transfer, accelerate the speed of microwave heating and moisture evaporation, to achieve the purpose of drying. Such devices are called mixing paddle type dryer or dryer.
Itself is not due to the solid material flow, the solid material in the dryer entirely on the blade and push the combined effect of gravity. Therefore, for all the flow of solid material within the dryer, it is necessary to set more blades. According to process requirements, the majority of paddle dryer microwave equipment horizontal placement, the material from one end of the join, discharged from the other end, can reduce back-mixing, the material residence time distribution narrows, nail conducive uniform drying.
In order to meet a variety of material properties and drying process conditions. Paddle dryer is a lot of structure and form. Because paddle dryer has many advantages, today there have also been new paddle dryer appears. Some of the dryer and then set in a traditional stirring blades as in a fluidized bed dryer and then set the heat carrier can pass into the hollow shaft and hollow blades to increase the heat transfer surface inside dry operation to reduce the amount of fluidizing gas , increase the heat utilization. If Dahua Chemical Machinery and Automation Research Institute based sauce with the invention of the internal returns paddle dryer has begun for the dry material viscosity and high humidity.
Depending on the device structure and the different heat carrier, mainly divided into the following three categories
① indirect heating paddle dryers;
② hot air paddle dryer;
③ vacuum paddle dryer.
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