Tunnel freezer, cryogenic system: coolant N2 (with a boiling point at -196 ° C), is sprayed directly on the products in the tunnel
The tunnel contains 3 zones with nozzles for spraying the coolant
Conveyor length 5 m, width 0.6 m
Adjustable conveyor speed determines the residence time, often about a few minutes
Tunnel temperature adjustable from -40 ° C to -120 ° C. Temperature control by means of ventilation and gas inlet
Scope
Cryogenic cooling and freezing allows the temperature to drop quickly
Application for:
Making IQF products (individually quick frozen products) such as peas, strawberries, ham cubes
Not damaging cell structures, to maintain texture with meat, vegetables, fruits and prepared meals
Crust freezing, by freezing only the product surface, to maintain shape (with corrugated ice cream), avoid moisture loss (with meat) and finer slicing (salami or cake).
Better hygiene through faster inhibition of growth micro-organisms
