Are fluidized bed dryers and bubbling bed dryers the same type of equipment?
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Our sulfuric acid an drying unit uses a fluidized bed dryer; in actual operation, the bed height is practically negligible. The drying performance is acceptable, but there is a significant amount of dust at the top of the dryer. It seems that a bubbling bed dryer is different from a fluidized bed dryer; a fluidized bed dryer does not require maintaining a certain height for the dry bed layer, whereas a bubbling bed dryer needs to maintain such a height, which helps ensure proper drying and results in less dust being carried along by the airflow. Excuse me, are a fluidized bed dryer and a bubbling bed dryer the same thing? Please give me some advice, thank you!
In fact, the fluidized bed dryer is also known as a bubbling bed dryer! The two are the same!
In fact, a bubbling bed and a fluidized bed are the same thing; it’s just a difference in terminology. In China, it was commonly referred to as a bubbling bed in the past, while in recent years the term fluidized bed has become more common. However, there is a common term in use in the market at present; although it is not scientific, it is popular in some areas, such as Jiangsu. There, an intermittent-operating fluidized bed dryer (which was widely used in the pharmaceutical industry in the past) is called a boiling bed, while a vibrating fluidized bed is referred to as a fluidized bed. The first term is acceptable, but calling a vibrating fluidized bed a fluidized bed is incorrect. Although these two types of equipment have certain similarities, they are not the same kind of dryer, and there must be differences in their operation methods. As mentioned on the first floor, “a fluidized bed dryer does not require maintaining a certain height for the dry bed layer.” . . ”It probably refers to a vibrating fluidized bed; it’s not that there is no need to maintain the bed height, but generally speaking, the bed height in a vibrating fluidized bed is low, the depth of the fluidized bed layer is high, and the wind speed is also relatively high.
The term \"boiling bed\" generally refers to a single-layer circular fluidized bed, while \"fluidized bed\" generally denotes a horizontal bed. In principle, a bubbling bed is a fluidized bed, with the material in the bed in a state of bubbling fluidization. But in whatever form, including vibrating fluidized beds, the material must have a certain thickness; otherwise, the system air will create a short circuit and fail to achieve cooling or drying effects