How does the coater achieve zero-waste, precise spraying of oils and fats in aquatic feed?
Publish Time: 2025-08-21
In modern aquaculture, the nutritional profile and processing technology of feed are directly related to the growth rate, health, and profitability of farmed animals. Oils and fats, as a high-energy nutrient source, play a crucial role in aquatic feed. However, traditional spraying methods often suffer from uneven oil distribution, surface buildup, loss, and low utilization rates. This not only wastes resources but also affects feed stability in water. The emergence of vacuum coating machines, particularly advanced equipment like the coater, through innovative structural design and intelligent control, has truly achieved "zero-waste, precise spraying" of oils and fats in aquatic feed. This effectively prevents pellet breakage and significantly improves feed quality and production efficiency.
1. Vacuum Environment: Deep Oil Penetration, Eliminates Surface Waste
The coater's core advantage lies in its "vacuum coating" technology. Within a sealed chamber, the equipment first creates a vacuum, reducing the pressure inside the pelleted feed and extracting air from the feed's micropores. Oil is then injected. Utilizing the principle of pressure differential, the oil rapidly penetrates the pellets under negative pressure, rather than simply adhering to their surfaces. This "inside-out" coating method significantly improves oil absorption. Even with just 1% oil added, even and thorough coating is achieved, truly achieving "low oil, high efficiency" and fundamentally avoiding the drawbacks of traditional spray coating, such as oil loss, oxidation, and low oil utilization.
Aquatic feed pellets (especially extruded feed and shrimp feed) are relatively fragile. Traditional mixing equipment can easily cause pellet breakage, affecting feed quality and animal consumption. The coater utilizes a twin-screw rotor structure with scientifically designed spiral blades for smooth operation. During mixing, the feed pellets are subjected to gentle tumbling and propulsive forces, rather than violent impacts. This gentle mixing method ensures even oil distribution while minimizing the breakage of large feed pellets, preserving feed integrity and appearance, and enhancing product value.
To achieve uniform application of even trace amounts of grease, the Coater features eight sets of high-precision nozzles evenly distributed around the machine body. These nozzles, combined with a high-pressure atomization system, atomize the grease into extremely fine particles, creating a uniform oil mist environment. The combined effects of vacuum and agitation allow the oil mist to be rapidly absorbed and penetrated by the feed particles. Even with a dosage as low as 1%, every grain of feed is uniformly coated, achieving truly uniform coating and eliminating areas of over- or under-oiling.
4. Flat-Bottom Gate Discharge Design: No Residue, No Leakage, Clean and Efficient
Conventional coating machines often suffer from poorly designed discharge ports, leading to residual material, grease leakage, and difficulty in cleaning. The Coater features a fully enclosed flat-bottom gate discharge structure. The gate opens smoothly during discharge, allowing the material to be discharged smoothly under the force of gravity and the rotor, eliminating any dead corners. Furthermore, the tight sealing design effectively prevents grease and particle leakage during operation, ensuring a clean production environment and minimizing material loss.
5. Corrosion- and moisture-resistant design throughout: Durable, reliable, and easy to maintain.
Designed for the high-oil, high-humidity production environment of aquatic feed, the coater has been comprehensively optimized in terms of material and structure. The internal chamber is treated with corrosion- and moisture-resistant materials, offering oil and corrosion resistance, extending the life of the equipment. The top cover features a rust-resistant, non-stick coating, effectively preventing grease and dust from adhering, making it easy to clean. The upper and lower surfaces of the rotor screw are also specially designed to minimize material buildup, ensuring long-term stability and sanitation.
6. Intelligent Operation and Easy Maintenance
The equipment is equipped with a user-friendly control system that allows for preset parameters such as batch size, oil volume, and mixing time, enabling automated operation. The user interface is simple and intuitive, and maintenance points are strategically located, making daily cleaning and maintenance extremely convenient, reducing labor costs and downtime.
With multiple technical advantages such as vacuum penetration, gentle twin-screw mixing, 8 sets of atomizing nozzles, flat-bottom gate discharging, and anti-corrosion design of the entire machine, coater not only achieves "zero waste and precise spraying" of aquatic feed oils, but also sets a new industry benchmark in protecting particle integrity, improving coating uniformity, and ensuring equipment durability.
