There are many types of dryers we sell, and rotary dryers are one of them. There are seven models of rotary dryers we currently sell. Each model has been well received by users. Below I will introduce the working principle of the machine.
回転乾燥機の設備
The rotary dryer equipment is mainly composed of a heat supply source, a loading machine, a feeder, a rotary drum, a discharge machine, an induced draft fan, a discharger, and a power distribution cabinet; after the dehydrated wet material is input from one end of the dryer, Under the flipping of the inner tube uniformly distributed, the material is evenly distributed and dispersed in the dryer, and is in full contact with the co-current (countercurrent) hot air, which accelerates the drying heat transfer and mass transfer driving force. In the drying process, under the action of the inclined plate and the hot air flow, the material can be controlled to move to another star-shaped discharge valve of the dryer to discharge the finished product.
The rotary dryer has a large processing capacity, simple operation, good drying effect, and the dried material is in direct contact with the hot air, and is dried by convection heat transfer. According to the flow direction between hot air and material, it is divided into the parallel flow and counter flow. In the concurrent flow, the hot air moves in the same direction as the material, and the hot air at the inlet is in contact with the higher moisture content. Since the material is in the surface vaporization stage, the product temperature still substantially maintains the wet bulb temperature.
回転乾燥機の出口側の材料の温度は上昇していますが、この時点での熱風温度は低下しているため、製品の温度上昇はそれほど大きくありません。したがって、より高い熱風入口温度の選択は製品の品質に影響を与えません。この熱に敏感な材料の乾燥には、肥料産業におけるアンモニウム塩の乾燥のように揮発性の材料を含むものが含まれます。しかし、アンモニウム塩の乾燥の場合、材料の温度は90 °C未満でなければならず、燃焼を避ける必要があります。
さらに、接着性の高い材料に対しては、同時乾燥を使用することが非常に有利です。逆流モードでは、熱風の流れの方向が材料の移動方向と反対になります。高温耐性材料には逆流乾燥が使用され、熱利用率が高いです。乾燥機の空気出口温度は、同時モードでは一般的に材料出口温度より約10-20°C高いべきです。逆流型では、空気出口温度は明確に定義されていませんが、出口温度として100°Cを使用するのが合理的です。
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