Fluidized bed dryer, also known as fluidized bed dryer, is used to dry wet materials by fluidization technology.There are many kinds of fluidized bed dryers, which can be roughly divided into the following types: single-layer fluidized bed dryer, multi-layer fluidized bed dryer, horizontal multi chamber fluidized bed dryer, pulse fluidized bed dryer, rotary fast dryer, vibrating fluidized bed dryer, centrifugal fluidized bed dryer and internally heated fluidized bed dryer.[1]
The fluidized bed dryer is composed ofAir filter, boiling bed hostcyclone separator 、Bag type dust removerHigh pressure centrifugal fan and operating platform.Due to the different properties of dry materials, when supporting dust removal equipment, it can be considered as required, and either cyclone separator, bag filter or one of them can be selected at the same time.Generally speaking, the cyclone separator is only needed for drying the granules and granular materials with large specific gravity.Small granular and powdery materials with light specific gravity need to be equipped with bag filter, and equipped with pneumatic feeding device and belt conveyor for selection.
Classification:
According to the dried materials, they can be divided into three categories: (1) suitable for granular materials;(2) Applicable to paste materials;(3) It is suitable for materials with fluidity such as suspension and solution.
According to different operating conditions, it can be divided into two types: continuous and intermittent.
According to the structure state, it can be divided into general fluidization type, stirred fluidization type, vibration fluidization type, pulse fluidization type and collision fluidization type.
working principle:
The granular solid materials are added into the fluidized bed dryer by the feeder, and the filtered clean air is heated and sent to the bottom of the fluidized bed by the blower. The distribution plate contacts the solid materials, forming a fluidized state to achieve gas-solid heat and mass exchange.The dried materials are discharged from the discharge port, and the waste gas is discharged from the top of the fluidized bedCyclone dust collectorGroup andBag type dust removerEmpty the solid powder after recovery.
Steam, electricity and hot blast stoves can be matched (according to user requirements).
characteristic:
It can implement automatic production and is a continuous drying equipment.The drying speed is fast, the temperature is low, the production quality can be guaranteed, and the GMP requirements for drug production can be met.
Scope of application:
It is applicable to the drying of granular materials, such as raw materials, tablet granules and traditional Chinese medicine;Drying and dehumidification of plastic resin, citric acid and other powdery and granular materials in medium dosage, chemical raw materials, and food and beverage;Chinese medicine, grain processing, drying of corn germ, feed, mineral powder, metal powder and other materials.The maximum particle size of the material can reach 6mm. The best is 0.5-3mm.
Dehumidification/drying bed
Announce
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Make the heated outside air flow over the moisture saturated dehumidification/drying bed,
To complete dehumidification/moisture absorbed by the drying bed will be released,
When the dehumidification/drying bed is dry enough, it will be cooled,
The water in another drying bed reaches saturation and is replaced in the closed loop[2]
