Engineering Value for Export-Grade Agro-Seafood: In export shrimp, pangasius fillets, and frozen tropical fruits, product quality depends strictly on passing the critical ice crystallization zone (0°C to -5°C) within minutes. Tan Long high-speed fluidized mesh belt IQF tunnels engineered with multi-directional high-velocity airflow at -38°C ÷ -42°C flash-freezes each cellular membrane in minutes, completely preventing macro-ice crystals from rupturing myofibrillar cell walls.
4. Proprietary Pneumatic Tapping Mechanism Preventing Product Sticking
When freezing peeled shrimp, squid rings, or diced fruits, product clumping is a critical defect in export contracts. Tan Long eliminates clumping completely utilizing our advanced Pneumatic Mechanical Belt Agitation System:
- Individual Product Separation in Crust Freezing Zone: Upon product entry, pneumatic mechanical agitators vibrate the belt with adjustable frequency, gently separating individual shrimp or fruits in the -42°C fluidized air stream.
- Ultra-Rapid Surface Crust Freezing in 45 Seconds: The outer product membrane freezes solid instantly, halting moisture transpiration and inter-product adhesion, locking in natural nutrients and color.
- US Standard Ashworth SUS304 Stainless Mesh Belt: Precision-woven mesh with smooth planar contact prevents marks on delicate seafood skins and enables rapid CIP spray cleaning.
5. Automated CIP (Cleaning-In-Place) Sanitary Food Safety System
Sanitation downtime is an invisible operational cost. Tan Long’s automated CIP system cuts washdown time from 4 hours to just 45 minutes:
3-Step High-Pressure CIP Sanitization Protocol
- Automated Hot Gas Evaporator Defrost: Clears frost from evaporator aluminum fins completely in just 12 minutes.
- Detergent & Sanitizer Foam Spray: Automated high-pressure pump sprays food-grade sanitizing foam covering top and bottom surfaces of the mesh belt.
- High-Pressure Pure Water Rinse: Wide-angle spray manifolds flush all residue into a 2-degree sloped stainless bottom drain channel.
Pre-Shift Automated Belt Drying
High-velocity warm dry air blowers thoroughly dry stainless mesh links within 15 minutes, completely preventing frozen water droplets from jamming drive chains at the start of the next shift.
1. Aerodynamic Principles & Mechanical Architecture of Tan Long IQF Freezers
- Heavy-Duty Insulated Enclosure Cabinet: Constructed with high-pressure 150mm PU panels with Camlock fasteners (45 kg/m³ density) and double-sided 0.8mm SUS304 stainless steel skins, fully seam-welded against vapor penetration and compatible with hot-water chemical CIP sanitization.
- Specialized SUS304 Stainless Mesh Belt: Imported sub-zero rated stainless mesh with smooth planar contact that avoids marking seafood flesh, steplessly driven via VFD inverter from 5 to 45 minutes retention.
- High-Capacity Evaporator Coils & High-Static Axial Fans: SUS304 stainless tube coils with wide 16mm fin spacing prevent frost bridging. High-static axial fans generate intense updraft convection blowing through mesh apertures between individual shrimp, fluidizing items and flash-freezing them 360 degrees.
- Automated Water Defrost System: Ultra-fast water defrost cycles completing in 30 to 45 minutes, restoring 100% evaporator heat transfer capacity between shifts.
1,000 kg/h SUS304 fluidized mesh belt IQF freezing line commissioned for export seafood plant
2. Technical Specifications Matrix for Tan Long Fluidized Mesh Belt IQF Models
| Equipment Model | Freezing Throughput | Chamber Dimensions (LxWxH) | Refrigeration Capacity (-40°C) |
|---|---|---|---|
| TL-IQF-300M | 250 – 350 kg/h | 8,500 x 2,600 x 2,800 mm | 55 kW (Freon / NH3 Refrigerants) |
| TL-IQF-500M | 500 – 600 kg/h | 12,000 x 2,800 x 3,000 mm | 85 kW |
| TL-IQF-1000M | 1,000 – 1,200 kg/h | 16,500 x 3,200 x 3,200 mm | 165 kW (Recommended central NH3 compressor rack) |
| TL-IQF-1500M | 1,500 – 1,800 kg/h | 21,000 x 3,600 x 3,400 mm | 240 kW |
3. Real-World IQF Commissioning Projects
Tan Long has engineered, fabricated, and commissioned fluidized IQF lines across major aquaculture centers:
- Ca Mau 1,000 kg/h IQF Freezing Line Handover: 1,000 kg/h high-speed line freezing black tiger and vannamei shrimp for EU and US markets.
- VinaCleanFood Soc Trang IQF Project: Integrated fluidized IQF line interfacing directly with automated -25°C clad-rack cold storage.
In-Depth Technical FAQs on Fluidized Mesh Belt IQF Freezers
1. What is the product weight shrinkage (drip loss) through Tan Long IQF freezers?
Thanks to high-velocity forced convection air held at -40°C, product surfaces crust-freeze within 60 seconds. Proven moisture shrinkage across Tan Long IQF tunnels is verified below 0.8% 0.5% (compared to 2% - 3% in conventional batch blast rooms), yielding millions in annual commercial profit preservation.
2. Should an IQF freezing line utilize Ammonia (NH3) or Freon R404A/R507A?
For compact IQF tunnels under 500 kg/h, eco-Freon R507A or R404A with two-stage screw compressors is cost-effective. However, for industrial lines from 500 kg/h upwards, Tan Long recommends 100% deploying Ammonia (NH3) screw compressor systems to achieve 30% electrical power savings and minimal refrigerant operating costs.
