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Project Case: Installation and Commissioning of Vibrating Fluidized Bed Dryers

Apr 09,2026

Installation and Commissioning of Vibrating Fluidized Bed Dryers

1. The vibratory fluidized-bed dryer must be installed on a level foundation, with the bed frame and support structure securely fastened. Upon completion of the lower casing installation, the horizontal alignment of the perforated plate shall be within the permissible tolerance. Flexible connecting ducts between the upper and lower casings, as well as between the upper casing and the exhaust pipe, must be tightly sealed to prevent air leakage and material spillage.

2. During installation of the cyclone separator and the reverse-air bag filter, ensure that the central axis is vertical and securely fasten the anchor bolts of the supporting structure to prevent any rocking or vibration. The clearance between the upper and lower valve plates of the discharge device should be as small as possible to ensure a tight seal, thereby minimizing entrainment of material by the exhaust airflow during discharge. If the cyclone separator and the reverse-air bag filter are installed outdoors, the outer casing must be thermally insulated (insulation to be provided by the user).

3. The screw feeder shall be installed on a sturdy platform, ensuring that, during rotation, the screw blades do not rub against or impact the inner wall of the feed housing. The reducer and the electromagnetic speed-control motor must be securely mounted on the platform, and the platform supports must be firmly anchored with foundation bolts to ensure smooth operation of the reducer and the electromagnetic speed-control motor.

4. Each fan shall be securely fastened to the foundation using anchor bolts to ensure stable operation and the absence of abnormal impact noises.

5. The heat exchanger shall be installed on a foundation, with the steam inlet end positioned higher than the drain end to ensure smooth condensate discharge.

6. When flange connections are made on steam pipelines, a high-temperature-resistant asbestos gasket or a PTFE gasket shall be placed in the joint; expansion bends or expansion joints shall be provided to accommodate thermal expansion and contraction. For ductwork flange connections, an asbestos rope gasket or a rubber-asbestos gasket shall be used as the interposed packing. All bolts for pipeline flange connections must be tightened securely to ensure there are no steam or air leaks.

7. Verify that the power supply voltage and frequency are 380 V (or 220 V) and 50 Hz, respectively. Once you have confirmed that the power supply is correct, connect it to the electrical control cabinet and all powered equipment.

8. Adjust the rotational speed of the screw feeder’s screw shaft to achieve the required feed rate under steady feeding conditions.

9. Adjust the excitation force of the vibration motor to regulate the bed amplitude, ensuring that the amplitude is matched to the material properties and the hot-air velocity so as to quickly bring the material to the fluidization state.

10. By adjusting the position of the bolt connection holes on the vibration motor base plate and the lower housing flange, the vibration direction angle can be changed, thereby regulating the drying time of the material within the vibratory fluidized-bed dryer and ensuring that the final moisture content of the product meets the specified requirements.

11. Adjust the steam valve of the heat exchanger to ensure that the steam supply matches the required hot-air temperature and airflow for the drying process.

12. While ensuring that the required drying heat is supplied, adjust the valves on the air inlet ducts of the fan and the vibrating fluidized-bed dryer so that, when no material is being fed, a slight positive pressure is maintained above the orifice plate, and when material is being fed, a slight negative pressure is maintained above the orifice plate, thereby achieving uniform fluidization.