Dalian Rubber & Plastics Machinery Co., Ltd. has recently revealed that its 200,000-ton large-scale plastic granulator is now in the manufacturing phase. This marks a significant milestone as China's first large-scale plastic granulator moves into official implementation. The project was designated as a key national debt project by the National Development and Reform Commission, highlighting its strategic importance. According to the schedule, the first domestically produced 200,000-ton unit is expected to be completed by early 2009 and will then be deployed at Yanshan Petrochemical Company.
A plastic granulator plays a crucial role in the post-processing stage of polyethylene and polypropylene production lines. It combines mechanical, electrical, and instrumentation technologies, featuring high levels of automation. As one of the essential components in large-scale ethylene projects, it is a critical piece of equipment. Currently, only a handful of global companies, such as Germany’s W.P., possess the full technical capabilities for design, manufacturing, installation, and commissioning. In China, while some 70,000-ton units have been built through joint ventures with foreign firms, these efforts have not achieved complete success.
Large-scale granulation units require a production capacity of over 50 tons per hour, translating to an annual output of 300,000 to 400,000 tons. Their design and manufacturing are complex, and their international market price ranges from $5 million to $7 million per unit. Despite this, demand for such equipment has surged in recent years, leading to a supply shortage. This gap continues to drive reliance on foreign suppliers.
Industry experts emphasize that the future of large-scale plastic granulators lies in achieving greater precision, advanced control systems, and improved mechanical stability. Users increasingly prioritize energy efficiency and reduced consumption. With global polyolefin production lines now reaching up to 500,000 tons per year, granulation units must not only scale up but also ensure operational reliability. Precision extrusion is required for certain specialized plastics, which necessitates the development of melt gear pumps. Additionally, next-generation granulators should integrate intelligent systems that enhance performance, material utilization, energy efficiency, and environmental sustainability.
In developed countries, plastic granulators typically feature online process parameter monitoring and closed-loop computer control, ensuring stable operation and product quality. In contrast, China’s domestic technology still lags behind. Most current efforts focus on small and medium-sized equipment, while large-scale extrusion granulators for polyolefins remain heavily imported.
It is worth noting that Dalian Rubber & Plastics Machinery Co., Ltd. has made significant progress in recent years. The company has successfully designed 70,000- to 100,000-ton granulation units and has mastered the manufacturing processes and special technologies for major components through independent research and the introduction of advanced techniques. This development marks a step forward in China’s push for self-reliance in critical industrial machinery.
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