Quick-Frozen Vegetable Production Line

The difference between quick-freezing and slow-freezing

Key Indicators for Quick-Freezing

The quality of quick-frozen vegetables depends on two core indicators:

Freezing Speed: Vegetables are quick-frozen in a cold air environment at -33℃ to -40℃ for approximately 45 minutes (the exact time varies depending on the vegetable variety).

Ice Crystal Control: Vegetables are rapidly passed through the maximum ice crystal formation zone at -1℃ to -5℃ to ensure the formation of small, uniform ice crystals.

Main Equipment List

Based on the actual production project configuration, the main equipment of the quick-frozen vegetable production line includes:

Asphalt Pretreatment Equipment

(1) Vibrating Screen

Function: Effectively removes soil and impurities mixed in with vegetables through high-frequency vibration

Application: Suitable for preliminary cleaning of granular vegetables such as beans and corn kernels

(2) Color Sorter

Function: Uses optical recognition technology to distinguish defects on vegetables such as insect holes and color spots, and automatically removes unqualified products

Technical Features:

High-speed camera recognition

Compressed air nozzle removal

Multiple sorting modes can be set

(3) Bubble Washer

Function: Uses high-pressure bubbles and water flow impact to make vegetables roll in water, fully removing surface dirt

Working Principle: A bubble generator is arranged at the bottom to generate a large number of microbubbles. The impact force generated by the bursting of bubbles peels dirt off the surface of vegetables.

Blanching Equipment

Spiral Blanching Machine

Function: Allows for continuous blanching of vegetables by adjusting blanching temperature and time according to processing needs.

Technical Features:

Spiral propulsion structure ensures continuous movement of materials in the blanching solution.

Adjustable temperature (typically 80-100℃).

Adjustable time (30 seconds - 5 minutes).

Equipped with a temperature control system to ensure even blanching.

Suitable Varieties: Green beans, broccoli, cauliflower, corn kernels, green peas, etc.

Quick-freezing Equipment

Individually Quick-Frozen (IQF) machine

The fluidized bed freezer is currently the mainstream equipment for quick-freezing vegetables. It can achieve individual quick freezing (IQF), ensuring that vegetable particles do not stick together.

Working principle: Vegetables are suspended in a fluid-like state under the action of a strong cold airflow, and each particle is cooled evenly, achieving rapid freezing.

The quick-frozen vegetable production line processes fresh vegetables into products that can be stored at -18℃ for six months to a year through a core process of "washing → cutting → blanching → cooling → draining → quick-freezing → packaging". Core equipment includes bubble washing machines, spiral blanching machines, fluidized bed freezers, and automatic packaging machines. The fluidized bed freezer is the key equipment for achieving individual quick-freezing (IQF). It uses a strong cold airflow to rapidly freeze vegetables in a suspended state, forming tiny ice crystals, thus maximizing the preservation of the vegetables' color, aroma, flavor, shape, and nutrients. With the development of ultra-low temperature quick-freezing technology and intelligent control technology, quick-frozen vegetable processing is continuously progressing towards greater efficiency, energy saving, and better preservation.

Shandong TCA Intelligent Technology Co., Ltd. is a global manufacturing supplier specializing in comprehensive solutions for food processing projects. Its core focus is on the research and development and sales of complete sets of equipment for processing potatoes, fruits and vegetables, and meats. With its strong technological R&D capabilities, comprehensive end-to-end service system, and global footprint, it has become a leading enterprise in the fruit and vegetable processing equipment field. Its quick-frozen vegetable production line, with its high degree of automation, stable equipment performance, and excellent cost-effectiveness, is suitable for medium to large-scale food processing enterprises with large-scale production needs, plans to expand into international markets, or those requiring complete solutions.