DKN-LFT-1206 is the 1200 mm wide mesh belt model in the Kunning Cryo liquid nitrogen quick-freezing tunnel line: mesh belt 6000 mm (length) × 1200 mm (width), overall lifting-type body, operating temperature -150℃～room temperature, temperature control accuracy ±2℃, no-load cooling 10℃ per minute, total power 9 kW, feed end to discharge end cycle 6～30 minutes adjustable. Suitable for aquatic products, meat and poultry, prepared dishes and other deep low-temperature quick-freezing production lines requiring continuous feeding and stable rhythm.
Technical Parameters
| Item | Parameter |
|---|---|
| Tunnel mesh belt size | 6000 mm (length) × 1200 mm (width) |
| Equipment external dimensions | 6000 mm (length) × 2200 mm (width) × 1750 mm (height) |
| Operating temperature | -150℃ ～ room temperature |
| Temperature control accuracy | ±2℃ |
| Cooling speed | No-load cooling 10℃ per minute, adjustable according to actual conditions |
| Conveying cycle | Feed end to discharge end 6～30 minutes adjustable |
| Total power | 9 kW |
| Power supply specification | 380V/50Hz |
| Refrigerant | 5-8 bar liquid nitrogen (liquid nitrogen storage tank self-provided) |
| Oxygen concentration detection | Set value 19.5% ～ 21.5% |
| Lifting stroke | 550 mm, inner cavity 750 mm |
| Top fan | Air volume up to 6000 m³/h, air pressure 65 Pa |
Processing capacity varies with product type, single-piece weight, spreading thickness and packaging method; specific configuration is determined according to customer materials and capacity requirements.
Frame and Insulation
- Overall lifting-type body, inner and outer cavities made of SUS304 food-grade stainless steel plate by shearing, bending and double-sided welding, with reinforcing ribs at load-bearing positions, no deformation under long-term load.
- Reinforcing ribs are SUS304 stainless steel square tubes, all treated with low-temperature foaming to prevent cold air penetration; insulation layer is multi-layer adiabatic foaming structure, thickness 150 mm.
- Lifting system is mechanical structure, motor plus worm gear transmission, good synchronization, equipped with automatic locking device and manual safety bolt.
- Bottom of the body is shallow V-shaped design with drainage outlet; after lifting, it is convenient to clean the body and mesh belt without dead angles, and easy to replace wearing parts.
Mesh Belt Conveying System
- Conveyor belt is high-elasticity SUS304 stainless steel mesh belt wire, equipped with variable-frequency speed-regulating motor and adaptive tensioning device, maintaining operating tension at low temperatures.
- Transmission power is variable-frequency motor plus reducer, mesh belt speed variable-frequency adjustable, feed end to discharge end cycle 6～30 minutes adjustable, and equipped with independent variable-frequency motor to separately adjust conveying speed.
- Mesh belt runs smoothly, easy to install and replace; for how speed and temperature coordinate, refer to Liquid Nitrogen Quick-Freezing Tunnel Freezing Cycle and Mesh Belt Speed.
Freezing System and Temperature Field
- Cooling system can be selected in liquid nitrogen manual and automatic modes; the system consists of external liquid nitrogen storage tank (self-provided), liquid nitrogen delivery pipe (self-provided) and the equipment’s proportional valve, injection pipeline and nozzles, low-temperature motor fan, exhaust gas extraction fan; exhaust requires self-provided exhaust duct.
- Liquid nitrogen flow is regulated by low-temperature proportional valve dual-valve control system, achieving heat exchange control through independent algorithm, and equipped with manual liquid nitrogen shut-off valve.
- Multiple groups of stainless steel nozzles form uniform and stable liquid nitrogen cold flow, injection devices are installed above and below the conveyor belt, can be fully or independently opened, injection angle adjustable, making quick-freezing more uniform.
- Top of the equipment is equipped with low-temperature explosion-proof moisture-proof fully sealed long-axis motor and nylon axial flow fan, blades light, no frost at low temperature, air volume up to 6000 m³/h, air pressure 65 Pa; fans are arranged at specific angles to maintain uniform temperature field.
Control System and Safety Design
- Control system has automatic and manual refrigeration modes; touch screen input, PLC intelligent control, with PID automatic adjustment; 10-inch color screen, can store multiple freezing processes, one-key operation.
- Temperature measurement uses PT100 platinum resistance (Class A), temperature measurement range 200℃ ～ -200℃, one main control, one monitoring; contactors, buttons and other electrical components use imported parts, integrated electrical cabinet located on the right side of the feed inlet.
- Safety design: dual temperature sensors and feedback system, over-temperature alarm; emergency stop switches at discharge end, electrical cabinet and receiving end; oxygen concentration detector interlocked with equipment; equipment with grounding wire, circuit breaker and phase sequence protector.
Applicable Scenarios
| Scenario | Description |
|---|---|
| Aquatic processing | Fish, shrimp, shellfish continuous IQF, requiring rapid passage through ice crystal formation zone |
| Meat and poultry processing | Continuous line quick-freezing of cut meat, poultry IQF and block freezing |
| Prepared dishes and conditioning packs | Multi-category switching, calling different mesh belt speeds and temperature programs according to process |
| Central kitchen and group catering | Continuous quick-freezing coordinated with front and rear sub-packaging and packaging rhythm |
For batch production, DKN-LFC series liquid nitrogen quick-freezing cabinets are available; for the choice between cabinet and tunnel types, see Liquid Nitrogen Quick-Freezing Cabinet and Liquid Nitrogen Quick-Freezing Tunnel.
Installation Conditions
- Site: reserve operating and maintenance space according to external dimensions 6000 × 2200 × 1750 mm.
- Power: 380V/50Hz, wire and ground according to total power 9 kW and on-site power distribution capacity.
- Liquid nitrogen: on-site liquid nitrogen storage tank and delivery pipeline required (user self-provided), supplied at 5-8 bar.
- Exhaust: equipment exhaust gas extraction port needs to be connected to high-flow exhaust fan, ventilation set according to on-site conditions, coordinating with the use conditions of oxygen concentration detection.
Warranty and After-Sales
Complete machine warranty one year; after receiving the request, provide a solution within 2 hours, arrive on site within 24 hours, eliminate the fault within 72 hours; provide one free on-site service per year, lifetime technical support.
Frequently Asked Questions
How is the capacity of DKN-LFT-1206 calculated, and what does the mesh belt size represent?
Mesh belt 6000 mm (length) × 1200 mm (width) is the effective conveying surface size; actual hourly capacity is related to the freezing cycle, which can be adjusted within 6～30 minutes; when calculating, single-piece weight, spreading thickness, target center temperature and shift output requirements need to be provided.
What are the cooling speed and loaded freezing time of this equipment?
No-load cooling 10℃ per minute, adjustable according to actual conditions. Loaded freezing time depends on material thickness, initial temperature, moisture content and packaging method; the thinner the spreading, the faster the freezing, calculated according to specific products.
Does the equipment come with a liquid nitrogen storage tank, and at what pressure is liquid nitrogen supplied?
The equipment does not come with a liquid nitrogen storage tank; liquid nitrogen is supplied by the user’s on-site storage tank through low-temperature delivery pipeline (storage tank and delivery pipe are both self-provided), working pressure 5-8 bar, flow controlled by proportional valve.
What is the overall lifting and 550 mm stroke used for?
Overall lifting-type body, lifting stroke 550 mm, inner cavity 750 mm. After lifting, it is convenient to clean the body and mesh belt without dead angles, replace parts and perform maintenance; the lifting system has automatic locking and manual safety bolt.
What is the oxygen concentration detection used for?
Liquid nitrogen vaporization can cause local oxygen deficiency; the equipment is equipped with an oxygen concentration detector, set value 19.5%～21.5%, interlocked with the equipment to protect operator safety.
To verify the model according to materials and capacity, you can go to Contact Us to provide single-piece weight, target center temperature and shift output requirements, and we will calculate according to parameters.