Continuous Chemical Withering – Tray Type

The conveying surface is high strength, spiral mesh belt OR Tray chain to handle leaf loading up to 400 Kgs/mrtr².

The conveying surface is made of food grade perforated SS. All contact parts with the leaf is in SS 304. All side panels, bottom panels, partition panels, end panels are made of SS 304, 2 mm thick.

The feeding of leaf into the Continuous Chemical Withering (CCW) tank is using a full width feeding conveyor.

The system will guarantee that there is no temperature build-up during the chemical withering stage. This is ensured by blowing humidified air at 85 to 90% RH through the leaf stack height. (Humidification technology is a special feature which is supplied at extra cost).

Our humidification system includes the pressure regulator, pressure switch, pressure relief valve, and high pressure hose. Pump station is skid mounted. All nozzle mounting arrangement and nozzles is part of supply. There are isolation valves and flexible connections for each nozzle.

The equipment is supplied with specially designed double impeller fans (two impellers on a single shaft motor) of high. This is a unique arrangement to ensure the aeration is consistent up to a stack height of 1.8 mtrs. We guarantee the exit velocity of air through the leaf stack height at top to be 12 ft / minute.

The feeding arrangement is through 2 Vibratory Green Leaf Sifters feeding a full-width PVC Belt Conveyor 3 mtr wide. This PVC Belt Conveyor 3 mtr wide will drop the teas into the Mesh Belt OR Tray chain 3 mtr wide. There is a VFD on the PVC feeding conveyor also to match the ratio of linear speeds of the PVC belt and the Mesh Belt OR Tray chain within the tank.

Equipment is supplied with Humidity & Temperature Sensors positioned at various intervals to monitor leaf temperature, air temperature and RH conditions.

We guarantee ‘zero-level bruising of leaf’ during the feeding of leaf in the Continuous Chemical Withering (CCW), since the raw material is evenly fed through appropriately designed conveyors.

Further, we have provided a unique doffer system for discharge of leaf from the Continuous Chemical Withering (CCW). This will ensure zero bruising of leaf, thereby, retaining the leaf in its original texture and form – before it moves into the physical withering stage.

Variable Frequency Drive on the drive to increase / decrease linear speeds to adjust loading and unloading rates of green leaf input into the tank.

The central console is positioned on top of the cat-walk for easy access & supervision of leaf, while operating the equipment. The cat-walk is also part of supplier’s scope.

All MS steel framework will be finished with food grade quality epoxy paint system. In our Continuous Chemical Withering (CCW), there is NO wetting of leaf. Gem is the 1st company in the industry to introduce humidification system in the Continuous Chemical Withering (CCW).

The equipment has double impeller fans of high SP 65 mm. This is a unique arrangement to ensure the aeration is consistent up to a stack height of 2 mtrs, if required.

The equipment is supplied complete in all respects including PLC and HMI on the central console.