Liquid Nitrogen Tunnel Freezer Iqf Quick Freezing Machine Quick
Freezing Tunnel
Liquid nitrogen tunnel freezer use liquefied nitrogen (LN2) for
continuous cooling and freezing. The conveyor belt moves the
product along the tunnel. Controlled injection of low temperature
liquefied gas can evaporate instantly and reduce the temperature in
the tunnel. The latent heat of evaporation is the main source of
cold energy. The turbulence fan spreads the gas in the tunnel in a
controlled manner and effectively transfers the cooling to the
product surface. The exhaust pipe removes the residual gas.
Specification
| Equipment material: | Inner and outer are made of SUS304 stainless steel |
| Power distribution: | Distribute according to customer's local voltage situation |
| Working temperature: | -120℃~ Room temperature |
| Temperature control precision: | ±2℃ |
| Cooling rate: | ≥10℃/min |
| Insulation of equipment: | 150mm thickness, foam polyurethane insulation, excellent insulation
performance |
| Food transportation: | SUS304 special food conveyor belt, speed and tightness can be
adjusted automatically |
| Liquid nitrogen control valve: | Combined control of automatic valve and manual stop valve, equipped
with redundant system to ensure adequate safety |
Convection circulation:
| Enhanced axial fan with high-power fan motor, cooling speed is fast
and uniform, with double air lock function at both ends,
effectively reducing cold air leakage |
| Lifting system: | Screw lifter, lifting height: 500mm |
Electrical control:
| Man-machine interface +PLC, easy to operate, intuitive and reliable
control, with temperature monitoring and alarm functions,
electrical interlock, to ensure the safety of equipment and process
operation. |
Equipment maintenance:
| The long-life and low-consumable design, simple replacement of
vulnerable part, excellent maintainability. |
Equipment cleaning:
| Starting from the inclined bottom plate and central drain of the
quick-freezing tunnel, DJL quick freezer is designed to ensure the
sanitation and hygiene of the equipment, and easy to clean: All
internal parts are made of stainless steel or polyethylene. The
modules are full welded connection and be grinded and polished;
With the help of the screw lifter, the roof of the tunnel can be
lifted vertically to facilitate the full cleaning of the tunnel.
There is a drainage outlet at the bottom of the equipment. |
Although there are standard model for DJL IQF Nitrogen Tunnel
Freezer, customized tunnels can be designed to meet the specific
needs of any individual application.
| Model | Tunnel length
(mm) | Wire belt width
(mm) | Power
(Kw) | Freezing output
(Kg / hour) |
| DJL-QFL-1206 | 6000 | 1200 | 10 | 400 ~ 600 |
| DJL-QFL-1209 | 9000 | 1200 | 12 | 800 ~ 1000 |
| DJL-QFL-1212 | 12000 | 1200 | 18 | 1000 ~ 1200 |
| DJL-QFL-1612 | 12000 | 1600 | 22 | 1500 ~ 1800 |
| DJL-QFL-1615 | 15000 | 1600 | 28 | 1800 ~ 2100 |
| DJL-QFL-1618 | 18000 | 1600 | 32 | 2000 ~ 2500 |
| DJL-QFL-1624 | 24000 | 1600 | 44 | 2500 ~ 3000 |
| DJL-QFL-1636 | 36000 | 1600 | 70 | 4000 ~ 4500 |
Liquid nitrogen tunnel freezer have many USES. You can handle any
product flow that must be continuously cooled, refrigerated or
frozen. It is suitable for the industrial production mode of large
batch, continuity, fewer people and larger area, it can be combined
with other food lines to form an automatic line. Mainly used in
food industry. Suitable for high value-added food production line,
such as: processing of fish and shrimp, shrimp meat, seafood,
aquatic products, fresh products, meat products, high-grade fruits,
out-of-season fruits, medicinal materials, etc.
FAQ
1. How fast is DJL liquid nitrogen freezing technology?
DJL reply: There will be differences according to the different
thickness and the packaging and different freezing temperature of
product, when extreme temperature is used, DJL liquid nitrogen fast
freezing speed can freeze naked frozen food with a thickness of 5CM
in 3 minutes at the fastest., However, it is more common to freeze
naked-food which up to 10CM thick within 10-30 minutes, usually
used temperature between -80℃ to -120℃, extreme use of liquid
nitrogen immersion, the temperature can reach -196℃.
2. What are the advantages of liquid nitrogen quick freezing
compared with the traditional freezers and iqf freezer?
DJL Reply: Before answering this question, it is necessary for us
to clarify the standard definition of quick freezing: quick
freezing of food is to place the pre-processed food into a
low-temperature device, pass through the largest ice crystal
formation zone within 30 minutes, and the central temperature drops
from 0℃ to Below -5℃, the diameter of the ice crystals formed is
less than 100μm, and the center temperature of the food after quick
freezing must reach the food freezing technology below -18℃. Due to
its fast speed, the cell integrity of liquid nitrogen quick-frozen
food was much higher than that of traditional freezing method, and
the cell damage rate was nearly 80% less than that of slow-freezing
food, so its taste, nutrition and color are much better than slow
freezing food, In terms of seafood, DJL liquid nitrogen
quick-freezing technology can be comparable to seafood in fresh
state after freezing and thawing. Therefore, liquid nitrogen
quick-freezing technology can better maintain the color, aroma,
flavor and taste of food, and its sales value will also be greatly
improved.
3. What is the dry consumption of liquid nitrogen quick freezing?
DJL reply: For seafood naked freezing with high water content,
after froze by DJL liquid nitrogen freezing technology, its dry
consumption is about 1‰ to 5‰, while the traditional freezing
method is generally within 3~5% . If the product with a relatively
high unit price, alarge part of the loss of economic value can be
avoided by dry consumption weight.
