With the needs of social sustainable development, achieving energy saving and emission reduction has become an important goal for plastic pellet manufacturers. This article mainly discusses the energy saving and emission reduction technologies of plastic pelletizing machines from three aspects: motor energy saving, waste heat recovery and production process optimization.

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  1. Motor energy saving technology

The motor power directly affects the energy consumption level of the pelletizer. First, use variable frequency speed regulation motor to match motor speed with load and reduce no-load losses. Second, optimize the motor transmission system and use high-efficiency reducers to reduce transmission losses. Third, install power regeneration devices to recover the electric energy during motor braking.

  1. Waste heat recovery technology

In the operation of the pelletizing machine, a large amount of low-grade heat is generated in the equipment and raw materials. It can be recovered in the following ways: 1 Install barrel jacket water circulation system to preheat the circulating water by using the barrel heat overflow. 2 Adopt heat pipe air heat recovery device to preheat workshop air using exhaust heat. 3 Set up melt residual heat recovery device to produce low-pressure steam for production heating.

  1. Production process optimization

Reasonable production process is an important means to achieve energy saving: 1 Optimize barrel temperature control to prevent overheating and reduce heat loss. 2 Optimize pelletizer speed according to feed quantity within appropriate range. 3 Reasonably arrange production sequence to minimize process switching and reduce debugging loss. 4 Improve die structure to reduce melt stabilization time and increase output.

In summary, energy saving and emission reduction of plastic pelletizing machines should start from various aspects such as design, operation, and comprehensive utilization, so as to reduce energy consumption and pollutant emissions and achieve green manufacturing. This requires the joint efforts of enterprises and researchers to contribute to the sustainable development of the industry.