1. Overview
The Feedstuff Grease/Liquid Adding Machine is a critical pre-pelleting device in feed production, specialized in adding liquid ingredients—such as grease, L-Valine, and other nutrients—to feed powder. It solves three core pain points in feed processing: improving pellet nutrition, reducing dust during pelleting, and minimizing wear on pellet mill ring dies and rollers.
Notably, this machine is designed for pre-pelleting batch mixing with a liquid addition limit of 0–3% of the mixer’s total volume (exceeding 3% requires post-pelleting grease spraying to avoid affecting pellet formation). With high automation, precise dosing, and broad adaptability, it is an essential piece of equipment for commercial feed factories and intensive breeding bases aiming to upgrade feed quality.
2. Core Value: Why Pre-Pelleting Liquid Adding Matters
Adding liquids like grease at the pre-pelleting stage delivers unique value that complements post-pelleting spraying, making it indispensable for standard feed production:
2.1 Enhance Feed Nutrition & Pellet Quality
Grease and liquid nutrients (e.g., L-Valine) integrate evenly with feed powder, ensuring each pellet contains consistent nutrition. Grease also acts as a binder, resulting in finished pellets with smooth surfaces, higher density, and reduced powder loss during transportation.
2.2 Protect Equipment & Reduce Waste
Dust generated during feed powder mixing and pelleting accelerates wear on ring dies and rollers. Grease coats powder particles to suppress dust, extending pellet mill service life by 15–20% and reducing raw material waste from dust dispersion.
2.3 Lay the Foundation for Pelletizing
Controlled liquid addition (≤3%) improves powder flowability and binding, preventing blockages in the pellet mill and ensuring stable pelleting efficiency—avoiding soft, easily broken pellets caused by excessive moisture.
3. Working Principle
The machine realizes automated, precise liquid addition through a 7-step closed-loop workflow, controlled by an intelligent system:
- Raw Liquid Filtration: Grease or liquid nutrients are drawn from the oil sump, first passing through a coarse filter to remove impurities (e.g., debris, particles ≥50μm).
- Heating & Melting: The filtered liquid enters the oil tank, where a steam heating coil automatically heats it to 60–80℃ (adjustable based on liquid viscosity) to ensure smooth flow (critical for high-viscosity grease).
- Precise Dosing: The programmable PLC panel sets the required liquid volume; a high-precision gear pump pushes the liquid through a one-way valve (preventing backflow) and fine filter (removing impurities ≥10μm).
- Flow Monitoring: A high-precision flowmeter real-time tracks liquid output, feeding data back to the PLC to correct deviations (ensuring ±1% accuracy).
- Uniform Spraying: The liquid is delivered to a spraying pipe above the batch mixer, atomizing into fine droplets that evenly coat the feed powder.
- Residue Removal: After adding, the optional air-blowing system purges the pipe and nozzle to eliminate liquid residue—avoiding cross-contamination between different liquids.
4. Core Features & Advantages
4.1 Ultra-Precise Dosing for Consistent Quality
Equipped with a high-precision flowmeter (error ≤0.5%) and programmable PLC system, the machine achieves an adding accuracy of ±1%. This ensures uniform nutrient content across batches, avoiding nutritional imbalance in feed.
4.2 Dual Filtration & Anti-Residue Design
- Dual Filter System: Coarse + fine filtration removes impurities at two stages, protecting the gear pump, flowmeter, and nozzles from clogging and extending equipment life.
- Air-Blowing Residue Removal: Automatically purges pipes after shutdown, eliminating liquid buildup (critical for switching between grease and other nutrients to avoid cross-contamination).
4.3 High Automation & Anti-Disturbance Performance
The PLC control panel allows one-click setting of adding volume and speed; the system resists voltage fluctuations and electromagnetic interference, ensuring stable operation even in industrial environments. No manual monitoring is required during addition.
4.4 Wide Adaptability to Liquids & Feed
Suitable for adding grease (soybean oil, animal fat), amino acids (L-Valine), and other liquid nutrients. Compatible with diverse feed raw materials: soybean meal, cereal, fish meal, whey powder, and more—meeting needs for aquatic, poultry, livestock, pet, and ornamental fish feed.
5. Application Scenarios
5.1 Feed Raw Material Compatibility
Works with all common feed substrates, including:
- Protein sources: Soybean meal, fish meal, meat and bone meal;
- Energy sources: Cereal, whey powder;
- Roughage: Green fodder (dried and powdered).
5.2 Target Animal Categories
- Livestock: Pigs, cattle, sheep (add grease to improve energy content);
- Poultry: Chickens, ducks, geese (add amino acids to boost growth);
- Aquatic Animals: Fish, shrimp (add omega-3-rich oil to enhance palatability);
- Pets & Ornamental Fish: Customized nutrient addition for specialized diets.
6. Maintenance Guidelines
Proper maintenance ensures long-term stable operation and precise dosing: