Spiral belt freezer

Designed for quick freezing of portioned products, such as fish fillets, and chicken pieces, as various semi-finished products, cakes, pizza, and hamburgers. Structurally, the conveyor of such equipment is made in the form of a spiral that moves around a large-diameter drum. The unique distribution of the airflow in the spiral freezer minimizes the loss of product mass during its freezing. At the same time, thanks to the optimization of the product’s contact surface with cold air, the product’s freezing time has been significantly reduced. Spiral freezers do not take up much space and 50% less than the area of tunnel freezing chambers of the same performance. Depending on the type of product undergoing the freezing process, it is possible to control the speed of the conveyor, as well as the intensity of the airflow.

The main advantages and benefits of the freezer:
1) The original design of the conveyor belt prevents sticking and damage to the frozen products.
2) A special design that reduces the time and facilitates the washing and cleaning procedure of the spiral freezer.
3) Well-thought-out design of the freezer conveyor belt of inlet and outlet conveyors that reduces the formation of snow and ice inside the unit.
4) The specifics of the design, which improves air recirculation, allow to reduce the freezing time as much as possible with a 20% reduction in the airflow power. This results in energy consumption savings of up to 40%.
5) The total cost of freezing 1 kg of products is much lower compared to tunnel freezers.

Specifications
Purpose — freezing
Products – dumplings, varenyky, khinkali, chebureks, benderyks (pancakes with meat), nuggets, cutlets, etc.
Product position and orientation on the tape – arbitrary
The product`s laying on the tape – single-layer
Productivity — up to 1000-2000 kg/h (projected, depends on the product)
Time of defrosting, washing, drying, hours — 6-8
Nozzles for belt and drum washing machines – yes
Freezing time, min — 22…40
Product temperature at the input, °C — +10
The temperature of the frozen product at the outlet (after stabilization), °C — -12º … -18º
The product loading and unloading system – a conveyor system
The product supply direction – from bottom to top
Product input and output angle — 180°
The material of the conveyor – AISI 304 stainless steel
Modular tapes (Italy) — Habasit
The tape material – polyacetal
The total width of the tape, mm — 559
The effective width of the tape, mm — 500
The gap between turns, mm – 150
Useful gap between turns, mm — 90
Number of turns – up to 13
Unloading height, mm — 3250
Chamber height, mm — 3750
The thickness of the chamber insulation, mm — 150
The inner surface of the chamber panels – AISI 304 stainless steel
The external surface of the camera panels – a profiled galvanized steel sheet with a Food Safe coating
The floor of the freezer – a hermetic floor of the spiral freezer, made in the form of a tub with drains for draining water after defrosting – AISI 304 stainless steel.
The panel insulation material -polyurethane foam
Freezer doors – 800×2000 mm with heating
The material of spiral freezer panels and control panels – AISI 304 stainless steel
Soaking of the tape – yes
An air chamber is provided at the entrance of the product to the spiral freezer, which blocks the flow of cold air from the freezer – yes
The spiral freezer stops when the edges of the conveyor belt lift. The location of protective devices – 120° distribution along the drum diameter – yes
Spiral conveyor drive type — Electromechanical SEW – Eurodrive (frequency control).
Power: 400V, 50Hz.

The air cooler (fast freezer) provides circulation and cooling of the air in the chamber. Air is a cooler that ensures timely heat removal from the product by discharging it while passing through the air cooler. Thus, fast freezing is carried out due to low temperature, high air-circulation rate, and optimal airflow scheme. To increase the operation duration between defrosts, the air cooler system is equipped with a finned heat exchange unit with a variable pitch of the ribbed fin. It is equipped with fans that provide the required speed of air circulation. The air cooler can be made in various defrosting system options: electric, water, or hot steam refrigerant. Circular (peripheral) fan heating can also be provided. Fan motors are designed to operate at low temperatures (-38°C) and do not require maintenance. The air cooler body is made of galvanized steel.