Drying equipment

China Drying Network News Recently, Daqing Refining & Chemical Co., Ltd. came to the news that the imported 300,000-ton/year large extrusion granulation unit reduction gear box repaired by Dalian Rubber & Plastics Machinery Company has been running smoothly. Imports of large-scale extrusion granulator transformation of old equipment Group core devices borne by domestic enterprises for the first time, marking China's full realization of localization in large-scale extrusion granulator unit production and transformation.

As a key equipment for polyolefin industrial production, large extrusion granulation units have become a long-term pain in the Chinese plastics industry and even in the Chinese petrochemical industry. A large-scale polyolefin pelletizing system has been hit by hundreds of millions of yuan, but the Chinese petrochemical industry has to rely on imports for a long time. In 2007, the National Development and Reform Commission formulated a special plan for the medium and long-term development of the ethylene industry, and proposed to speed up the process of localization and industrialization of major technical equipment in the ethylene industry, and strive to achieve key breakthroughs and developments in key technologies and equipment. As the core equipment in the downstream process of ethylene production process, the large-scale extrusion granulation unit is an important part of China's realization of large-scale production of key equipment for ethylene.

With the joint efforts of countries and enterprises, breakthroughs have been made in the research and development of large-scale extrusion granulation units. Large-scale polypropylene mixing extrusion granulation units and polyethylene large-scale mixing units have been successively domesticated. The first domestic 250,000-ton/year high-density polyethylene (HDPE) mixing extrusion granulation unit developed and manufactured by Dalian Rubber Plastics Machinery Co., Ltd. successfully completed its final empty load test and began to dismantle and leave the factory.

At the same time, the technological level of small and medium extruders in China is also rapidly progressing. Extruder important indicators, such as torque, speed, output, etc. are almost equal to the international mainstream level. For example, the Nanjing Satoshi SAT52 twin-screw extruder exhibited at K2010 uses a self-developed high-speed, high-torque gearbox with a torque of 11Nm/cm3, which is currently the leading level of the world's mainstream twin-screw technology; The twin-screw extruder with a torque of 8.9Nm/cm3 was exhibited at the K2010 with a speed of up to 800rpm. Nanjing Keya Company directs the twin-screw technology's positioning to the international leading level. Its new twin-screw extruder series is equipped with German imported gearboxes, and the torque can reach 12Nm/cm3. Control technology, feeding technology, automatic Network-changing technology is equipped with the highest level of technology at home and abroad.

In spite of this, it is not difficult to see from the latest developments in China's extrusion industry that the full breakthrough and advancement of China's extrusion granulation technology will be in the near future.

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