Core safety operating procedures and key protection points. Strict adherence to operating procedures is essential to mitigate safety risks: First, pre-start inspection: Confirm that the equipment's protective cover, emergency stop button, and leakage protection device are intact. Clean up debris around the equipment and check that the raw materials are free of metal, stones, or other impurities. Before starting the dry fish feed production equipment, run it unloaded for 5-10 minutes to check the screw rotation, temperature control, and hydraulic system for normal operation. Feed materials only if no abnormalities are found. Second, during operation: Do not open the equipment's protective cover or touch high-speed rotating parts or the high-temperature extrusion chamber. Disassembly and repair are strictly prohibited while the equipment is running. If material jamming or oil leakage occurs, immediately stop the machine, disconnect the power, and allow it to cool down before addressing the issue. Operators must wear protective gloves and goggles to avoid burns from hot raw materials and oil. Third, post-shutdown procedures: Turn off the power and wait for the equipment to completely stop and cool to room temperature before cleaning up any remaining raw materials and maintaining the equipment to prevent accidental restarts.
Practical techniques and control methods for energy saving and consumption reduction. Energy consumption can be reduced by 15%-20% through optimized operation and parameters: Firstly, parameter optimization: During dry fish feed pellet extruder production, avoid blindly increasing speed and temperature. Precisely adjust according to feed requirements; for example, when producing sinking feed, reduce speed and steam addition to decrease energy consumption. Rationally combine raw materials to improve utilization and reduce ineffective processing energy consumption. Secondly, equipment optimization: Install a frequency converter on the extruder drive motor to dynamically adjust speed according to production capacity requirements, avoiding energy waste caused by constant speed operation, especially suitable for small-batch, multi-batch production. Regularly clean the cooling system and steam pipes to improve thermal efficiency and reduce heating and cooling energy consumption. Thirdly, production planning: Rationally arrange production batches to achieve continuous production and avoid frequent start-ups and shutdowns (energy consumption during equipment startup is 1.5 times that of normal operation). Recycle processed debris and substandard particles for secondary crushing and processing to improve raw material utilization and reduce waste.
Special safety and energy-saving points for extruders. Due to the high temperature and pressure characteristics of wet pet food processing machines, two points require extra attention: First, pressure and temperature protection. The overload alarm device must be sensitive, automatically alarming and shutting down when the extrusion chamber pressure exceeds 6MPa or the temperature exceeds 160℃, preventing equipment damage and safety accidents. Second, steam recovery and utilization. The high-temperature exhaust gas from the extruder outlet is introduced into the raw material preheating chamber to preheat the raw material to 40-50℃, reducing heating energy consumption. Simultaneously, waste heat from the cooler is recovered for workshop heating, improving energy efficiency. For example, a feed mill installed a frequency converter and waste heat recovery device on its twin-screw extruder, saving over 50,000 yuan annually in electricity and gas costs. Furthermore, through standardized and safe operation, it achieved zero safety accidents throughout the year.
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