Working principle of vibrating fluidized bed dryer

Technical summary:

The precision-cast vibrating fluidized bed dryer is an enhanced special-purpose drying device, which is usually used for the final drying of the material. Since the material is fluidized by mechanical vibration during the drying process, it not only facilitates boundary layer turbulence, enhances heat and mass transfer, but also ensures that the drying equipment operates under relatively stable flow mechanics conditions. In addition to having a very dry function, this device can also be based on

Vibrating fluidized bed dryer

The process needs to be accompanied by processes such as material granulation, cooling, sieving and conveying. It has been widely used in industrial sectors such as sugar, medicine, fertilizer, chemical, plastics, dairy, salt, and mining and metallurgy. This technology is basically mature and has been serialized.

working principle:

Working principle of vibrating fluidized bed dryer

At present, Zui Guang's horizontal vibrating fluidized bed dryer is similar in shape and basic structure to the conventional horizontal fluidized bed dryer. The difference is that the entire body of the vibrating fluidized bed is supported on the base by a spring, the perforated plate is slightly inclined toward the discharge end, and a vibrating motor is mounted on one side or both sides of the body. The material is fluidized by the action of mechanical vibration and perforated airflow, and moves forward under the action of vibration.

The machine is excited by the vibration motor to generate the exciting force. The material jumps forward under the action of the exciting force in a given direction. At the same time, the hot air input under the bed causes the material to be in a fluidized state, and the material particles are in full contact with the hot air, thereby achieving the desired effect. . The material enters the machine from the inlet, and under the action of the vibration force, the material is thrown forward and continuously in the horizontal direction. The hot air passes through the fluidized bed and the wet material heat exchange, and the humid air is discharged by the cyclone after being removed by the cyclone, and the dry material is discharged from the discharge port.

It has very outstanding advantages:

(1) Uniform fluidization at very low gas velocities, which greatly reduces energy consumption, interparticle wear and dust entrainment;

(2) The material residence time is evenly distributed, which can be considered as “piston flow”, and the residence time is easy to adjust and control, so that a very ideal product moisture content can be obtained.

Features:

1. The object is evenly heated, the heat exchange is sufficient, the drying strength is high, and the energy saving is 30%-50% than that of the ordinary dryer;

2. The vibration source is driven by vibration motor, which is balanced in operation, convenient in maintenance, low in noise and long in life;

3, uniform fluidization, no dead space and blow through phenomenon, can obtain uniform drying, cooling, humidification products;

4, good adjustability, adaptable surface width, material layer thickness and moving speed in the machine and full amplitude change can achieve stepless adjustment;

5, the surface damage to the material is small, can be used for the drying of fragile materials, and the material particles are irregular, and the working effect is not affected;

6. It adopts a fully enclosed structure to effectively prevent cross-infection of materials and outside air, and the working environment is clean;

7. Vibration helps the material to be dispersed. If the appropriate vibration parameters are selected, the materials that are easy to agglomerate or produce channel flow in the ordinary fluidized bed can be fluidized and dried smoothly;

8. Because there is no intense back mixing, the airflow speed is lower than that of the ordinary fluidized bed, and the damage to the material particles is small. In the drying process, it is required to not destroy the crystal form, or the material zui which is required for the surface luminosity of the particles is suitable.

Application areas:

1. Pharmaceutical industry: various kinds of granules, boric acid, borax, benzenediol and other additives. :

2, food and building materials industry: distiller's grains, monosodium glutamate, sugar, salt, slag, watercress seed and so on. :

3. It is suitable for the drying, cooling and humidification of crystals and powder mixtures of various granular materials in chemical, pharmaceutical, food, beverage, seed, slag and other industries.

4. Others: mineral powder, metal powder, steel sand, bait, furfural, silica sand, toner, pottery, glutamic acid, quartz, abrasive, fertilizer, pasture, bone powder, mica asbestos, etc.

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