VIBRO FLUID BED DRYER

VIBRO FLUID BED DRYER (VFBD) is highly efficient using latest UK technology fans and specially designed plenum with controlled velocity of air at all the point, improves high thermal efficiency and saves in fuel cost. The grid plate configuration is specially designed to produce denser, blacker, bloomier Teas with excellent liquoring properties. The Unique flow control damper system enables to fire the Teas at a lower temperature and movement of Tea is fully controllable.

PROCESS

The fermented tea is spread over the perforated bed through a mechanical feeder & spreader. The tea is fluidized by hot air pushed into the drying chamber through an aerodynamically designed plenum chamber & the mechanical vibrator which moves the teas forward. The tea is dried uniformly & the moist air is discharged in the atmosphere. The exhaust air from the last zone is recirculated into the air heater for improving fuel efficiency.

PLENUM CHAMBER

The Profile of Plenum Chamber is designed aerodynamically to achieve desired fluidization velocity & pressure for better drying of tea.

GRID PLATE

This is made of heavy duty AISI – 304 grade stainless steel. The design, profiles configuration & nos of holes per sq. mtr. are so engineered to ensure better & even fluidization & moisture evaporation.

EXCITATION

Through articulated design & vibration system, the tea fluidizes angularly and then circulates and this sequence follows to attain perfect drying of tea particles uniformally.

DUST EXTRACTION SYSTEM

The cyclone system with automatic refiring of wet & fly off, design is uniquely designed to dry teas uniformally. Only hot air is blown out. No fly off around the dryer. The fans cyclone & ducts are made of S.S.Hence, no rusting. The cyclone fans are specially developed on UK Technology for higher efficiency.

VIBRATION SYSTEM

Through a heavy duty double crank, oscillating vibration is caused to plenum, which is supported by special spring fitted, to cause excitation to the plenum chamber for better movement & fluidization of Tea.

ADDITIONAL SPECIAL FEATURES OF “ZEST”

The additional special features added  outdates all VFBD in use and makes it a class A part and leaves no choice to the user to think other than METKRAFT VFBD.

THREE STAGE TEMPERATURE DRYING ZONES

Main Advantages of three stage temperature drying are:- Initial drying at high temperature zone ensures immediate arresting of fermentation process along with removal of moisture. This is followed by drying at low temperature zone for balanced removal of moisture. This whole process ensures proper enzymic and chemical reactions in the tea and optimizes prevention of losses of important organic compounds.

FLOW CONTROL DAMPERS

Unique design of air flow control dampers system incorporated help in controlling the thrush-put time of Tea in dryer. Thus residence time of tea in the plenum chamber can be controlled as per the condition of Tea being dried for perfect drying.

PLUG FLOW TYPE FLUIDIZATION

This system ensures thorough mixing of solids with even & uniform drying and eliminates case hardening.

DOUBLE CRANK

We have incorporated the double crank system for effective trouble free runner with long life of crank bearings. This has added to the efficiency of the system.

CRITICAL STUDY HAS BEEN DONE IN RESPECT OF THE MAJOR POINTS

Temperature & Moisture Loss – relation between two & relative pattern.
The residence time distribution in different stages.
Handling of soft withered leaves to produce better rate.
Constant rate period of drying – Specific drying rate.
Higher & smooth throughput without interruption.
Fuel efficiency & conservation.