At present, most feed mills in our country use ring-molded pelleting to produce aquatic feed. The hard pellets produced by ring-molded pelleting sink into the bottom for 10-20 minutes and then disintegrate, with poor feedability, and some remain in the water environment, which seriously pollutes water quality; while extruded feed undergoes high temperature and high pressure, it is a kind of low pollution , Environmentally friendly feed with less waste and high conversion rate. Therefore, aquatic extruded materials have gradually replaced hard pellets to become the mainstream of aquatic feed. The production process of aquatic extruded feed generally includes raw materials crushing, mixing, secondary micronization, extrusion, drying, cooling and other processes. Among them, extrusion has a very important position in the entire process and has a greater impact on feed quality and production efficiency. Big. For this reason, this article discusses the working characteristics and reasonable selection of single and twin-screw aquatic feed extrusion extruders, and provides references for manufacturers to correctly apply aquatic feed extrusion extruders, so that extrusion technology can really play a role in production. To achieve the purpose of increasing production, reducing consumption, and improving nutrient digestibility and energy utilization during feeding.
The twin-screw extruder has the advantages of strong adaptability, sliding conveying and self-cleaning, but its structure is complicated, the investment cost is high, and the corresponding maintenance and operation costs are also high. Therefore, the twin-screw extruder is generally used in the production of high-value-added aquatic products and pet feed, such as the production of eel, turtle and juvenile feed, because the price of these products on the market is sufficient to repay the twin-screw technology. The cost of manufacturing products; other special aquatic feeds, such as fine aquatic feeds (0.8-1.5mm in diameter), high-fat aquatic feeds, and feeds with small production volumes but often changing formulations also need to be produced with twin-screw extruders.
இரட்டைஸ்கிரூ எக்ஸ்ட்ருடரின் வளர்ச்சி சீனாவில் எவ்வளவு தாமதமாக உள்ளது. நடுத்தர அளவிலான இரட்டைஸ்கிரூ எக்ஸ்ட்ருடரின் கच्चு பொருள்களின் கேள்விகள் பரந்த அளவிலானதாவதால், ஸ்கிரூ வேகத்தை அதிக அளவில் சரிசெய்யவேண்டும், ஏனெனில் அதன் வேலை குறியீடு எளிய ஸ்கிரூ எக்ஸ்ட்ருடரின் வேலை குறியீட்டிலிருந்து மாறுபடுகிறது. குறிப்பாக, பருத்தை, ஸ்கிரூ, துருக்குநிரல் மற்றும் கியர் பெட்டி ஆகியவற்றின் அமைப்பு மிகவும் சிக்கலானது, இது உபகரண செலவின் மேம்பாட்டுக்கு வழிவகுக்கிறது.