Feed pulverization plays a crucial role in determining the digestibility of feed, animal performance, and the overall quality of the final product. The right particle size can significantly enhance feed conversion rates, reduce fecal output, improve animal growth performance, and make the feeding process more efficient during mixing, pelleting, and extrusion. Below is an overview of the main objectives behind feed grinding.
One of the primary goals of feed processing is to increase the surface area of the feed ingredients. This makes it easier for animals to digest and absorb nutrients. Research has shown that reducing particle size improves the digestion and absorption of dry matter, protein, and energy, while also decreasing the proportion of undigested material in the feces.
Another important objective is to enhance the processing characteristics of the materials. By grinding the feed, the particle size becomes more uniform, which helps minimize segregation after mixing. For trace elements and small components, proper grinding ensures they are evenly distributed, meeting the requirements for consistent mixing. Additionally, in pellet production, the particle size of the ground material must be carefully considered, as it directly affects the durability of the pellets and the stability of aquatic feeds in water.
In addition to these benefits, appropriate grinding also supports better nutrient utilization and reduces waste. It contributes to more effective formulation of feed rations, especially when dealing with complex mixtures containing multiple ingredients. Proper particle size control is essential not only for maximizing nutritional value but also for ensuring the efficiency and consistency of the entire feed manufacturing process. Overall, feed pulverization is a key factor in achieving high-quality feed and promoting optimal animal health and productivity.
Diesel Engine
Diesel engine is an engine that burns diesel fuel to obtain energy release. The working process of a diesel engine is actually the same as that of a gasoline engine, and each working cycle also goes through four strokes: air intake, compression, work and exhaust.
The diesel engine sucks pure air in the intake stroke. When the compression stroke is nearing the end, the diesel fuel is increased to more than 10MPa by the fuel injection pump, and is injected into the cylinder through the fuel injector, and mixed with the compressed high-temperature air in a very short time to form a combustible mixture. Due to the high compression ratio of the diesel engine (generally 16-22), the air pressure in the cylinder can reach 3.5-4.5MPa at the end of compression, and the temperature is as high as 750-1000K (while the mixture pressure of the gasoline engine at this time will be 0.6-1.2MPa, and the temperature will reach 600-700K), which greatly exceeds the autoignition temperature of diesel. Therefore, after the diesel fuel is injected into the cylinder, it mixes with the air in a very short time and immediately ignites and burns on its own. The air pressure in the cylinder rises sharply to 6-9MPa, and the temperature also rises to 2000-2500K. Driven by high-pressure gas, the piston moves downward and drives the crankshaft to rotate to do work, and the exhaust gas is also discharged into the atmosphere through the exhaust pipe.
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