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.
回转干燥设备
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.
尽管旋转干燥机出口侧材料的温度在上升，但此时热空气的温度已经降低，因此产品的温度上升并不太大。因此，选择更高的热空气进气温度不会影响产品的质量。这种对热敏材料的干燥包括那些含有挥发性材料的材料，例如肥料行业中氨盐的干燥。然而，对于氨盐的干燥，材料的温度应低于90°C，以避免燃烧。
此外，对于高粘附性材料，采用并行干燥也是非常有利的。在逆流模式下，热空气流动的方向与材料运动的方向相反。对于耐高温材料，采用逆流干燥，热能利用率高。在并行模式下，干燥机的空气出口温度一般应比材料出口温度高约10-20°C。在逆流类型中，空气出口温度没有明确的定义，但使用100°C作为出口温度是合理的。
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