Vibration Analysis Vibro Fluidized Bed Dryer Using Finite Element Method

Nowadays, the vibrating fluidized bed dryer is one of the most popular kinds of tea drying equipment available. The water content is lowered to 2.8–3.8 by applying the heat generated by the heater, which stops the enzyme-based oxidation process. The objective is to investigate how vibration affects a vibro-fluidized bed dryer's inherent frequency, structural integrity, and tea mass loading on the device. Tea powder is sprayed onto beds using vibro-fluidized bed dryers, which use an eccentric motor to create vibrations. Hot air flows from tiny holes in the bed into the tea powder that is circulating on it. After leaving the heating furnace, the hot air is directed through air ducts beneath the vibro-fluidized bed drier by the main fan. A cyclone extracts the tea powder and evaporates moisture, which is then released from the vibro-fluidized Bed dryer. Once disturbed, a system is allowed to vibrate on its own without external stimuli, oscillating at its natural frequency. As per the early analysis of the vibro-fluidized Bed Dryer, the dryer structure's normal frequency in the first three modes was 5.8876 Hz, followed by 9.5267 Hz and 10.512 Hz. The vibro-fluidized bed dryer structure's stress is within acceptable bounds when the safety factor for each loading variation is FS>1. The vibro-fluidization frequency of the bed dryer with a tea mass of 695 kg matches to the excitation frequency under real-world conditions. The tea mass supplied to the system increases with the natural frequency of the vibro-fluidized bed dryer. Static structure studies show that the von Misses stress of the vibro-fluid layer drying structure increases with the mass of tea added to the system. The largest von Mises stress was seen at a tea mass of 695 kg.