Twin-Drum Spiral Freezer

Lynxcool's twin-drum spiral blast freezer features a high-capacity continuous IQF system. It houses two independent, self-stacking spiral conveyors within an insulated enclosure, each located on a separate rotating drum, sharing a refrigeration system and a common air vent.

The Twin-Drum Spiral Freezer also supports an operating mode not available in single-drum designs: batch operation. In this mode, two different products can be loaded simultaneously onto two conveyor belts—one product rises on drum 1, and the other descends on drum 2—with independent dwell times for each product controlled by a uniform conveyor speed. This allows the Twin-Drum Spiral Freezer to be flexibly applied to multi-SKU production environments.

The refrigeration system of each Twin-Drum Spiral Freezer—including the screw compressor, condenser, evaporator coil array, EC fan system, and PLC control system—is integrated with the dual mechanical conveyor system and insulated housing into a single, factory-tested component.

Standard refrigerants: R404A, R507A, R448A, R449A, and R717 (ammonia).

Technical Parameters

Core Technological Advantages

1. Dual-Drum, Dual-Helix Architecture: A single continuous conveyor belt spirals upwards on drum 1, then transfers to drum 2 via the top and spirals downwards. This achieves double the conveyor belt length and freezing time within a footprint only 30-40% larger than a single-drum system, making it particularly suitable for thick products.

2. Shared Refrigeration for High Efficiency and Energy Saving: A single refrigeration system serves both drums, reducing capital investment and energy consumption per kilogram of product compared to two independent single-drum freezers.

3. Product-Specific Operation Mode: Supports simultaneous freezing of two different products on the same machine, significantly improving equipment utilization in multi-SKU production environments.

4.Hygienic and Easy-to-Maintain Design: Our Twin-Drum Spiral Freezer complies with EHEDG standards, features an open frame, and supports full CIP cleaning. Drum transfer sections and conveyor belt disassembly require no tools, facilitating thorough cleaning.

Application Scenarios

Meat and Poultry: Thick meat patties, bone-in poultry chunks (requires 20-45 minutes freezing time).

Seafood Processing: Shrimp, whole fish chunks, crab chunks.

Ready-to-Eat Meals: Cooked foods packaged in plastic trays, sauce containers.

Baked Products: Filled breads, puff pastry, etc.

Service and Guarantee

Origin and Certification: Designed and manufactured in China, compliant with ISO 9001, CE, EHEDG, and PED standards.

Factory Testing: Each unit undergoes an 8-hour conveyor belt test, refrigeration performance test, and PLC logic verification before leaving the factory.

After-sales Support: Global spare parts support and 48-hour emergency on-site service are provided. An optional 3-year extended warranty is available.

Our Twin-Drum Spiral Freezer offers a cost-effective solution combined with industrial-grade reliability, providing high-throughput food processing plants worldwide with a highly cost-effective freezing solution.

FAQ

Q: What is the difference between a twin-drum and a single-drum spiral freezer?

A: A single-drum freezer winds the belt around one drum. A twin-drum freezer has two drums in series: the belt ascends drum 1 and descends drum 2, roughly doubling freezing time in a slightly larger footprint. Twin-drum units are used for higher throughput, longer freezing times, or split-product operation. Lynxcool manufactures both and recommends the best option based on product and capacity.

Q: What throughput range does the twin-drum design cover?

A:1,000–10,000 kg/h per unit. Below 1,000 kg/h, single-drum is more economical; above 10,000 kg/h, twin-drum units are run in parallel. Selection depends on product properties, freezing time, and footprint. Lynxcool engineers provide detailed capacity analysis for each project.

Q: Can two different products be frozen simultaneously?

A: Yes, twin-drum units support split-product operation. Both products run at the same belt speed but can have different loading densities. PLC controls identification, sequencing, and discharge.

Q: How is the belt transfer between drum 1 and drum 2 managed?

A: A stainless steel bridge guides the belt from drum 1 to drum 2 smoothly, with adjustable rails and tool-free removal for cleaning. Each unit undergoes an 8-hour factory run-in test to ensure stability.

Q: How long does defrost take, and can it be managed without stopping production?

A: Hot-gas defrost takes 45–120 minutes and requires the freezer to be empty. PLC schedules defrost during breaks. Effective utilisation is 85–90%. Two units in lead-lag mode allow continuous operation during defrost.

Q: What sanitation procedures are required for a twin-drum unit?

A: Daily or shift-based wet cleaning. Twin-drum units feature removable panels, a detachable transfer bridge, tool-free belt removal, and CIP spray nozzles for all tiers. Procedures are in the commissioning manual.

Q: Where are these units manufactured, and what quality standards apply?

A: Made in China at Lynxcool’s ISO 9001-certified facility. Units have CE marking, follow EHEDG hygienic principles, and use AISI 304 stainless steel. Every unit undergoes full factory testing before dispatch.