LPS Vacuum Freeze Dryer for Food

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The vacuum freeze dryer is used to freeze and dry the materials, to freeze the materials in a low temperature at first, and then to dehydrate and sublime under the vacuum condition. Use the condensation method to capture the sublimation vapor, to attain the goal of drying the materials.

We can design multiple FDs of parallel combination according to the customers’ batch and varieties, for example 125 square meters X2 or 3 or 4.
Matching cold storage makes fruit and vegetables, plant frozen for reference that pre-freeze time is about 6-8 h and special requirements can be determined in consultation.
We can provide arrangement plan of FD equipment confirmed by the customers according to the HVCCP standard requirement.

Dry case is designed according to vacuum vessel of international standard. Case shape is horizontal cylinder. Exterior has multi-track stiffener to strengthen. Test the vacuum air impermeability after welding. Silicone rubber is used to seal between the drying case and the case door. Sight glass with light is set on the door. The hanger rail is set on the drying case to take the products get in and out.
Structure horizontal cylinder with stiffener Design standard vacuum vessel design
Material SUS or Q235A Leakage rate 25Pa×L/S

Heating plies made of D31 (6363) aluminium alloy sections are set on the both side of case. The top one is upper radiant shelf. Plies with products are between two heating plies. The surface of heating plies is after anodizing and the true color process. The function of heating plies is to give enough heat to the products.
Structure aluminium alloy sections Design pressure 0.6 MPa
Material D31 (6363) Design temperature 120℃

Condenser is a device for collecting steam after sublimation and is connected with drying case to decline motion-resistance force of water vapour. Condenser pipes made of stainless steel are formed after the machinery curving, jointed by automatic welder, tested according to 1.6MPa and leakage checking. Sight glass is on the rear end of condenser.
Structure horizontal cylinder with stiffener Design standard GB150-1998
Material SUS or Q235A Leakage rate 25Pa×L/S