What are the main pieces of equipment in a fresh-cut vegetable processing line?

The fresh-cut vegetable processing line is an integrated equipment system that achieves standardized processing of vegetables from raw materials to finished fresh-cut products through coordinated operations across multiple stages. The core equipment can be categorized into the following types based on the processing workflow:  
Ⅰ. Raw Material Pre-processing Equipment  
Conveying Equipment: Such as belt conveyors and screw conveyors, which transport raw vegetables (e.g., leafy vegetables, root vegetables, and fruit vegetables) from the raw material area to the processing line, reducing manual handling and improving efficiency.
Manual sorting tables: Equipped with conveyor belts and lighting systems, these tables allow manual removal of rotten, spoiled, or insect-damaged vegetables while performing preliminary grading of raw materials (e.g., size and appearance sorting) to ensure the quality of raw materials for subsequent processing.
Ⅱ. Washing Equipment
Washing is a core process in fresh-cut vegetable processing, and different equipment must be selected based on vegetable type. Common types include:
Bubble Washing Machine: Generates a large number of bubbles via a bottom-mounted air pump, causing vegetables to roll and collide in water. Combined with high-pressure spray rinsing to remove surface dirt and debris, it is suitable for leafy vegetables (e.g., spinach, lettuce) and fruit vegetables (e.g., tomatoes, cucumbers) with softer textures, minimizing mechanical damage.
Vortex Washing Machine: Utilizes high-speed water flow to create a vortex, causing vegetables to rotate and friction, thoroughly cleaning dirt in crevices while settling mud and sand. Suitable for root vegetables (e.g., potatoes, carrots) and vegetables with heavy mud content. Some models can integrate an ozone generator to achieve sterilization and degradation of pesticide residues.
Bristle roller washing machine: This machine uses rotating bristle rollers to friction the surface of vegetables, removing surface dirt, fuzz (e.g., carrots), or lightly peeling (e.g., potatoes). It is suitable for root vegetables with rough surfaces.
High-pressure spray washing machine: This machine uses high-pressure nozzles to direct water streams at vegetables, commonly used for secondary washing after cutting (e.g., removing juice and debris from cutting) to ensure cleanliness.
Ⅲ. Cutting/Peeling Equipment
Multi-Function Vegetable Cutter: Adjusts blades according to requirements to achieve slicing, shredding, dicing, and segmenting, such as dicing carrots or segmenting celery. Suitable for most vegetables, with precise adjustable cutting dimensions (e.g., 3-30mm).
Peeling Machine: Designed for root vegetables (e.g., potatoes, sweet potatoes), it removes the skin efficiently using steam peeling, mechanical friction peeling (e.g., bristle rollers), or chemical peeling (food-grade alkaline solution, requiring subsequent neutralization and rinsing), thereby reducing labor costs.
Ⅳ. Blanching/Sterilization Equipment
Blanching Machine: This machine uses hot water or steam to briefly heat vegetables (e.g., 60-95°C), inactivating enzymes to prevent oxidation and browning (e.g., potatoes, yams), while also removing some oxalic acid. It is suitable for vegetables that require color retention.
Pasteurization Machine: Uses low-temperature sterilization (60-80°C) to eliminate microorganisms on vegetable surfaces, extending shelf life. Commonly used for ready-to-eat vegetables to avoid nutrient and texture degradation caused by high temperatures.
Ozone Sterilization Machine: Integrates an ozone generator during the washing process, utilizing ozone's strong oxidizing properties to eliminate bacteria and viruses while degrading pesticide residues. Suitable for broad-spectrum sterilization of various vegetables.

Ⅴ. Dehydration Equipment  
Vibrating Screen Dehydrator: Removes excess moisture from the surface of vegetables through high-frequency vibration, suitable for leafy vegetables and small pieces of vegetables after cutting, preventing excessive moisture from causing mold growth.  
Air-Drying Line (Air-Drying Machine): Removes moisture from the surface of vegetables using strong airflow (at room temperature or low temperature), combined with a conveyor belt for continuous operation, ensuring uniform dehydration without damaging the material. Commonly used for final moisture control before packaging fresh vegetables.
Centrifugal Dehydrator: Uses centrifugal force to quickly spin off moisture, offering high efficiency. Suitable for large-volume vegetables that can withstand mechanical force damage (e.g., radish cubes, potato chunks).  
Ⅵ. Sorting and Inspection Equipment  
Weight Sorter: Sorts cleaned vegetables based on pre-set weight ranges to ensure uniform product specifications, suitable for scenarios requiring standardized packaging (e.g., premium cleaned vegetables for supermarkets).
Metal detector: Detects metal contaminants (such as tool debris) that may be mixed in during processing to ensure food safety, typically located at the final stage before packaging.
Color sorter: Uses optical recognition technology to remove vegetables with abnormal colors (such as yellowed leaves or spotted potatoes) to improve product appearance.
Ⅶ. Packaging equipment
Vacuum Packaging Machine: Vacuum-seals packaging to reduce oxygen exposure, extending shelf life (e.g., root vegetables can be stored for 7–15 days), suitable for products requiring long-distance transportation or long-term storage.
Modified Atmosphere Packaging Machine: Injects a mixture of gases such as nitrogen and carbon dioxide to inhibit microbial growth, maintaining vegetable freshness and color, commonly used for leafy vegetables and fresh-cut vegetables, extending shelf life by 3–5 days.
Automatic weighing and packaging machine: Integrates weighing and packaging functions to automatically complete quantitative portioning (e.g., 200g/bag, 500g/bag), improving packaging efficiency, suitable for retail scenarios such as supermarkets and e-commerce.
Ⅷ. Auxiliary Equipment
Water Circulation System: Filters and recycles wastewater for reuse, conserving water resources, reducing production costs, and meeting environmental requirements.
Control System: Achieves automated control of the entire production line via a PLC touchscreen, allowing adjustment of parameters such as speed, time, and temperature, suitable for processing multiple product varieties, and easy to operate.