The tunnel freezer generates extremely low temperature through refrigerant, allowing food to reach the ideal frozen state in a short period of time. This rapid freezing method can effectively lock in the moisture and nutrients of food, preserving its original flavor and quality to the greatest extent possible.
1. Application Fields
Tunnel freezer is widely used for quick freezing processing of seafood, meat, fruits and vegetables and other foods. For frozen shrimp, the tunnel freezing function ensures the independence and integrity of the product during the freezing process, avoiding adhesion and damage.
2. System composition
2.1 Cooling section
The tunnel freezer is composed of multiple cooling sections inside, each responsible for different cooling tasks. By segmented cooling, ensure a smooth transition of the product from room temperature to the final freezing temperature.
2.2 Conveyor System
The conveyor belt is an important component of the tunnel freezer, responsible for transporting products from the inlet to the outlet. A well-designed conveyor belt can avoid mutual contact between products and ensure the independence of each product.
2.3 Temperature Control System
The temperature control system adopts PLC (Programmable Logic Controller) for precise adjustment, real-time monitoring of temperature changes inside the tunnel, ensuring consistency and stability of the freezing process.
2.4 Exhaust System
To prevent water vapor generated during the freezing process from affecting product quality, the tunnel freezer is equipped with an efficient exhaust system to promptly remove moisture and maintain a dry environment.
3. Technical parameters
3.1 Freezing capacity
• Freezing temperature: -35 ° C
• Freezing time: 30 minutes
• Capacity: 2 tons/hour
3.2 Refrigeration System
• Refrigerant type: Environmentally friendly refrigerant
• Compressor power: 37kW
3.3 Conveyor Belt Design
• Material: Stainless steel
• Speed: adjustable, ranging from 1m/min to 5m/min
3.4 Energy Efficiency
• Electricity demand: average power consumption of about 37kW/h
Water resource demand: Each ton of product requires approximately 1.1 cubic meters of water
4. Implementation process
4.1 Production Process
1. Raw material preparation: Clean and pre cool fresh shrimp.
2. Entering the tunnel: Place the shrimp evenly on the conveyor belt and feed it into the tunnel freezer.
3. Rapid freezing: Gradually reduce the temperature to -35 ° C through multi-stage cooling sections.
4. Finished product output: After freezing is completed, the product is sent out from the export end and enters the packaging process.
4.2 Key Control Points
Temperature monitoring: Ensure stable temperature in each cooling section.
Humidity management: Maintain a dry environment through the exhaust system.
Product spacing: Reasonably set the product spacing on the conveyor belt to avoid adhesion.
5. Comprehensive benefit analysis
5.1 Improving Production Efficiency
The tunnel freezer adopts automated operation, greatly improving production efficiency. Compared to traditional freezing methods, its freezing time has been reduced by over 60%, significantly improving the overall operational efficiency of the production line.
5.2 Ensure product quality
Through rapid freezing technology, the tunnel freezer can effectively lock in the moisture and nutrients of shrimp, maximizing the preservation of its original flavor and texture. In addition, the independently frozen design avoids adhesion between products and improves the appearance quality of the products.
5.3 Environmental Protection and Energy Conservation
The use of low GWP (Global Warming Potential) environmentally friendly refrigerants reduces the impact on the environment. Meanwhile, an efficient energy management system reduces energy consumption, meeting the requirements of sustainable development.
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