Industrial Food Freeze Dryers

While a large numbers of material trays need to be handled. The FDR adopt auto loading unloading system to minimize the employees and labor time.

Raw products are placed in trays on trolleys which are hanged on overhead monorail. By slide the trolleys, operator can quickly transfer products to areas they want. For example IQF room, freeze dryer, harvest area and trays clean room.

Water circulates inside sandwich type heat-plates, the water is heated by steam and transfer heat to frozen products for sublimation. Water based heating system ensures maximum shelf temperature uniformity, and prevents products pollution due to heat transfer fluid leakage.

An extra heat-plate is installed on top of shelf module to provide extra energy for thermal balance. And temperature sensors are installed in both fluid inlet and return pipe, to control and monitor shelves temperature. Temperature variation between the heat-plates is < +/-2C.

Trolleys slide into drying chamber, the material trays will be suspended between 2 heat-plates. During freeze drying, heat energy transfer from heat-plates to frozen products are by radiation. The heat-plates are made of aluminum alloy that has very high heat conductivity coefficient.

The fluid channels in heat-plates adopt special ‘internal welding’ technology to ensure the surface flatness, and delicate designed fluid circuits to ensure the good temperature uniformity. Leak test for every heat-plates and entire shelf module to ensure the air tightness. Temperature variance between heat-plate points is < +/-2C.

Subsystems such as vacuum pumps, refrigeration compressors, fluid pumps and heating modules are placed besides the product chamber. Each sub-system as an individual module and linked together by the PLC. This design guarantees easy to produce, transport, install and maintain.

The components that installed in FDR freeze drying systems are from international brands or under international standards. Solidly built and high performance.

An individual IQF room is supplied together with the freeze dryer to perform products pre-freezing. Since there are 2 suits materials trays and trolleys, while 1 suit in product chamber for freeze drying, another 1 is in IQF room for pre-freeze. By this, per batch can save 3~4hrs pre-freeze time.