Why Is a Fluidized Tunnel Freezer Suitable for Small Food Products? How Can Product Clumping Be Prevented During IQF Freezing?

Individual Quick Freezing (IQF) is widely used in the deep processing of fruits, vegetables, seafood, and other small food products. Traditional freezing methods can easily freeze products into solid blocks, while the goal of IQF is to freeze each individual piece separately, making products easier to store, transport, portion, and use.

For products such as green peas, sweet corn kernels, diced carrots, and diced onions, a fluidized tunnel freezer provides a continuous freezing solution.

Understanding the working principle of fluidized freezing helps food processing companies improve product separation, freezing consistency, and production efficiency.

1. What Is a Fluidized Tunnel Freezer?

A fluidized tunnel freezer uses a vibration system to suspend products and move them along the conveyor belt, helping prevent sticking and achieve individual quick freezing.

When food products enter the freezing chamber, high-speed airflow in the fluidized bed lifts and moves the products, allowing their surfaces to come into rapid contact with cold air and achieve quick freezing.

This fluidization effect helps reduce prolonged contact between individual food pieces, making the equipment particularly suitable for small-sized and loose food products.

Fluidized tunnel freezers can be used for:

• Green peas, sweet corn kernels, diced carrots, and diced onions.

• Fruits and vegetables.

• Certain seafood products.

• Other granular, sliced, and diced food products.
  

2. Why Is Fluidized Freezing Suitable for Small Food Products?

1. Achieving Individual Quick Freezing and Reducing Product Sticking

Individual Quick Freezing means that each food piece remains relatively separate after freezing.

Under appropriate airflow conditions and with properly prepared products, fluidization allows individual pieces to move within the product layer, reducing prolonged contact between them and lowering the risk of sticking during freezing.

2. Supporting Continuous and Large-Scale Production

Fluidized tunnel freezers adopt a continuous feeding and discharging design, making them suitable for large-scale food processing operations.

For small products such as peas, corn kernels, and diced vegetables, this design helps maintain high production efficiency and consistent freezing quality.

Products enter the freezing zone through a conveyor belt, complete the freezing process, and then move on to subsequent processing or packaging operations.

3. Ensuring Uniform Freezing and Stable Product Quality

The equipment uses a specialized cold air circulation system and mechanical vibration to keep small food products moving on the conveyor belt.

As individual pieces are suspended and continuously turned over, cold air can reach the products more evenly, helping reduce localized freezing inconsistencies.

3. Why Do Food Products Clump Together During Quick Freezing?

Product clumping refers to individual food pieces sticking together during preprocessing, freezing, or conveying, eventually forming larger frozen lumps.

Common causes include the following:

1. Excessive Moisture on Product Surfaces

After washing, blanching, or other pretreatment processes, food products may retain excessive surface moisture.

When wet pieces come into contact with each other, the moisture between them can create a connection. As freezing begins, this moisture may form ice bridges, causing individual pieces to stick together.

2. Uneven Feeding and Excessive Product Layer Thickness

When products accumulate in certain areas of the conveyor belt, the local product layer may become too thick.

Overloaded areas can restrict airflow, extend freezing time, and increase the risk of products sticking together.

4. How Can Product Clumping Be Prevented During IQF Freezing?

1. Control Surface Moisture Before Freezing

Before products enter the quick freezer, use vibrating dewatering equipment or air drying methods to remove excess surface moisture.

This helps prevent excessive water from entering the freezing zone with the products.

2. Maintain Uniform Product Distribution

Ensure that products are evenly distributed at the feeding end of the conveyor to prevent piling and localized accumulation.

A uniform product layer helps cold air pass through the products more consistently.

3. Adjust Conveyor Belt Speed According to Product Requirements

Conveyor belt speed determines how long products remain inside the freezing zone.

If the belt moves too quickly, products may not reach the required core temperature. If it moves too slowly, production capacity may decrease and operating costs may increase without necessarily delivering a corresponding improvement in product quality.

5. Small Food Products Suitable for Fluidized Freezing

1. Fruits and Vegetables: Peas, corn kernels, green beans, diced carrots, and other small fruit and vegetable products.

2. Seafood: Shrimp meat, diced scallops, and other small seafood products.

3. Meat Products: Diced chicken, diced beef, and other small-sized meat products.

6. Conclusion: Use Fluidized Freezing to Reduce Clumping and Improve Product Quality

Fluidized tunnel freezers are suitable IQF freezing equipment for certain small-sized food products with good flowability.

If you are looking for an IQF freezing solution for green peas, diced vegetables, corn kernels, or small-sized seafood products, please feel free to contact us. Our team can evaluate your production requirements and recommend a suitable fluidized tunnel freezer configuration for your processing line.