Classification and working principle of vibrating fluidized bed dryer

- May 23, 2018 -

The vibrating fluidized bed dryer has a rapid drying speed during the operation. In use, the temperature inside the fluidized bed is uniform and can be easily controlled and adjusted. The time is relatively easy to select when used, so that water can be obtained. Extremely low dry material.

Classification of vibrating fluidized bed dryers

The vibrating fluidized bed dryer can perform continuous, semi-continuous and discontinuous production to a certain extent, and can be divided into its single layer, multi-layer and horizontal multi-chamber pulse and cone according to its structure during operation. And spray, vibration and inert carriers and other forms. When using this dryer to dry the ammonium oxide, the exhaust temperature is 50-60, the negative pressure is operated, the material particle size is 250-420, and it stays 120S in the machine.

The working principle of vibrating fluidized bed dryer

The vibrating fluidized bed dryer is effective when it is in operation. Its fluid and powdery materials such as powder and granules are placed on a gas flow distribution plate such as a perforated plate, and are directly sent from the lower part into the drying medium with a relatively high speed during the operation. When the velocity of the medium is low, gas flows between the particles of the material and the entire material layer does not move.

In a certain degree, the vibrating fluidized bed dryer gradually increases the air flow velocity. During operation, the material layer begins to expand. During use, the gap between the particles increases, and then the velocity of the air flow increases, and a considerable part of the material is suspended. The formation of a gas-solid mixed bed, ie a fluidized bed, is also referred to as a fluidized bed because the material suspended in the fluidized bed acts much like a boiling liquid.

In a certain degree, the vibrating fluidized bed dryer will effectively exhibit its fluid properties in many aspects, and it needs to maintain its level during operation. If the flow rate of the air is further increased, the particles are almost completely taken away by the air flow. Directly into the gas delivery. Therefore, the gas flow rate is the most fundamental control factor of the fluidized bed dryer. The appropriate gas flow rate should be between the fluidization of the material layer and the outflow of the material.

Fluidized bed heat exchange can be through the outer jacket or bed heat exchanger. When using in-bed heat exchangers, in addition to considering the general requirements of heat exchangers, it must also consider the impact on the flow of the material in the bed, that is, the form and installation of the heat exchanger should be as much as possible to facilitate the normal flow of fluids.