Horizontal Vibrating Fluid Bed Dryer

  • Granular raw materials can be easily fluidized, conveyed and processed.
  • For drying heat-sensitive products, it can avoid overheating of local materials, and has strong adaptability. It does not degrade the molecular weight of the product and does not destroy the physicochemical properties of the product.
  • It can provide a large contact area between the material and the fluid medium, so that the material can be uniformly mixed and fully heat and mass transfer, so it has a very high thermal efficiency.
  • Tube bundle type or plate type heat exchanger can be set up for indirect heating or cooling, which can make the material get a higher evaporation rate at a lower temperature, obviously save energy consumption and reduce waste gas purification facilities.
  • Drying and cooling can be efficiently carried out in a combined fluidized bed, thus saving investment and reducing production costs.
  • Automatically collect important data such as temperature of drying medium and negative pressure of bed surface in each section, realize computer control, and meet the requirements of drying process.
  • It is suitable for granular, powder and block products with an average particle size of 50μm-5mm.
  • The damage to the surface of the material is small, and it can be used for drying fragile materials; it does not affect the working effect when the material particles are irregular.
  • Good adjustability, adaptable to face width. The thickness of the material layer, the moving speed in the machine and the change of the full amplitude can be adjusted steplessly.
  • The fully enclosed structure effectively prevents the material and the air space from being infected and the working environment is clean.

Working Principle

Vibrating fluidized bed dryer is a very successful modified fluidized bed. Adding mechanical vibration to the fluidized bed is a vibrating fluidized bed. Due to the additional vibration of the bed, the resistance of heat transfer and mass transfer is reduced. The drying rate in the vibrating fluidized bed is 1.5 to 2.5 times higher than that in the convective fluidized bed. Compared with the fixed bed, the drying speed of the constant speed drying stage is increased several times. It is worth mentioning that the critical moisture content is also reduced due to vibration in the drying stage, and the vibration can adjust the resonance frequency of the moisture contained in the solid capillary so that the moisture bound in the molecular form is partially eliminated due to vibration.

Standard vibrating fluidized bed pressure-equalizing bellows, fluidization section and settling section are composed of three parts. The heat energy is transferred from the hot air to the surface of the wet material in a cross-flow manner and is heated and dried in the fluidization section. The wet material is mixed and collided with each other under the action of the hot air flow and the vibration force, so as to ensure sufficient mass transfer and collision between the wet material and the hot airflow. Heat transfer keeps the material layer on the bed in a fluidized state with uniform and directional movement. The entrained particles are separated from the airflow in the expansion section and settle into the fluidized section, and the dried product is discharged from the discharge port. The exhaust gas is purified by a cyclone separator and then discharged.

Application

It is suitable for drying, cooling and humidifying operations of powder, crystal, granular materials and granular materials made of powder in chemical, pharmaceutical, food, dehydrated vegetables, grain, mining and other industries. Such as: citric acid, monosodium glutamate, chicken essence, boric acid, borax, ammonium sulfate, compound fertilizer, soybean meal, distiller’s grains, seeds, slag, sugar, sodium gluconate, sodium fluorosilicate, etc.

Technical Parameters

Model

Fluidized bed area (m2)

Inlet air temperature (℃)

Outlet air temperature (℃)

Dry strength

(kg.H2O/h)

Vibration motor

Model

power

ZLG3×0.3

0.9

70-140

40-70

30-45

ZDS31-6

0.8×2

ZLG4.5×0.3

1.35

70-140

40-70

45-75

ZDS31-6

0.8×2

ZLG4.5×0.45

2.025

70-140

40-70

70-125

ZDS32-6

1.1×2

ZLG4.5×0.6

2.7

70-140

40-70

90-150

ZDS41-6

1.5×2

ZLG6×0.45

2.7

70-140

40-70

90-150

ZDS32-6

1.1×2

ZLG6×0.6

3.6

70-140

40-70

120-200

ZDS41-6

1.5×2

ZLG6×0.75

4.5

70-140

40-70

150-250

ZDS42-6

2.2×2

ZLG6×0.8

4.8

70-140

40-70

160-270

ZDS42-6

2.2×2

ZLG6×0.9

5.4

70-140

40-70

180-300

ZDS42-6

2.2×2

ZLG7.5×0.6

4.5

70-140

40-70

150-250

ZDS42-6

2.2×2

ZLG7.5×0.75

5.625

70-140

40-70

190-315

ZDS51-6

3.0×2

ZLG7.5×0.8

6

70-140

40-70

200-335

ZDS51-6

3.0×2

ZLG7.5×0.9

6.75

70-140

40-70

225-375

ZDS51-6

3.0×2

ZLG7.5×1.2

9

70-140

40-70

300-500

ZDS51-6

3.0×2

ZLG7.5×1.5

11.25

70-140

40-70

375-625

ZDS51-6

4.0×2

ZLG8×1.2

9.6

70-140

40-70

320-535

ZDS51-6

4.0×2

ZLG8×1.5

12

70-140

40-70

400-670

ZDS51-6

5.5×2

ZLG8×1.8

14.4

70-140

40-70

480-800

ZDS51-6

5.5×2

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