[Chemical Equipment Powerful Equipment] 080-Lums Process designs and manufactures domestic polymerization reactors
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The past ten years have been an era of great development for China's chemical industry. The emergence of many new processes, new products, and new equipment has also led to a great development in my country's chemical equipment, which has also promoted the rapid development of the petrochemical industry. Here we have collected and sorted out some of the achievements and breakthroughs made by my country's equipment companies in the large-scale and localization of equipment. Welcome everyone to share, discuss, and exchange, cheer for Made in China, and cheer for chemical equipment! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * On July 20, 2021, the 300,000-ton polypropylene polymerization reactor with an annual output designed and manufactured by Tianhua Chemical Machinery and Automation Research and Design Institute Co., Ltd. was delivered for use. This marks the completion and localization of the country's first Lummus process polypropylene polymerization reactor, and at the same time fills the gap in the design and manufacturing of domestic polypropylene reaction equipment.
The gas-phase polymerization reactor of the Lummus process on CNOOC's Ningbo Daxie project is the core equipment of the unit. The equipment of the domestic units in service are all imported. Through the joint efforts of the owner and other parties, the first domestic polymerization reactor designed and manufactured using the Lummus process was manufactured and delivered. The CNOOC Daxie Petrochemical Polymerization Reactor Project is the first domestic polymerization reactor designed and manufactured using the Lummus process. The Lummus process is a gas-phase polypropylene process. Because it can flexibly arrange the reactor layout, two reactors can be connected in series or parallel as needed. It has great production flexibility and can produce homopolymers, random copolymers, terpolymers, impact copolymers and other polypropylene products at the same time. The polymerization reactor is a key equipment in the Lummus process. Previously, the patentee believed that there was no domestic equipment manufacturer that could meet the processing requirements of this equipment. Currently, all projects that have been put into production use imported equipment.
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The Lummus process is a gas phase polypropylene process. Because it can flexibly arrange the reactor layout, two reactors can be connected in series or parallel as needed, and a variety of polypropylene products can be produced at the same time. Among them, the polymerization reactor is the key equipment in the Lummus process, and the projects currently in production use imported equipment. CNOOC Daxie Petrochemical Polymerization Reactor Project is the first domestic polymerization reactor designed and manufactured using the Lummus process. Tianhua Institute is a well-known enterprise in the field of chemical equipment research and development, design and manufacturing in my country. It has profound technical reserves in equipment design and manufacturing, provides excellent technical services to major domestic polypropylene production companies, and has been recognized by domestic and foreign chemical companies. After many investigations, CNOOC Daxie Petrochemical experts believed that the comprehensive strength of Tianhua Institute met all the requirements for the design and manufacturing of polymerization reactors, and it was finally determined that Tianhua Institute would undertake the localized design and manufacturing tasks for the polymerization reactor of CNOOC's 300,000-ton polypropylene project. In order to ensure the smooth completion of the project, Tianhua Institute quickly established a project team to develop a detailed design plan based on the use needs of CNOOC Daxie petrochemical equipment, and put forward higher design and manufacturing requirements for key processing parts of the reactor. Focusing on the characteristics and difficulties of polymerization reactor design and manufacturing, 3D laser scanning technology was innovatively used to control the reactor butterfly head accuracy to 0.5mm, which is far lower than the 1mm required by the patentee. With the joint efforts of the owners, licensors, design institutes and Tianhua Institute, after three years, Tianhua Institute finally completed the domestic design and manufacturing of the first domestic Lummus process polypropylene polymerization reactor.
On May 15, the "domestic application of 300,000 tons/year polypropylene extrusion and granulation unit" passed expert review and was in line with the "three new and three modernizations" (i.e.: New ideas, new technologies, new methods ； Simplification, standardization, and localization) project establishment and demonstration. The extrusion granulation unit is one of the key equipment of the polypropylene plant. At present, large-scale extrusion granulators for domestic polypropylene plants are mainly imported. Daxie Petrochemical adheres to the guiding ideology of "three new and three modernizations" and follows the principle of reducing costs, improving quality and increasing efficiency. After many investigations and technical discussions, it was finally decided to use domestic large-scale rubber extrusion granulation. In addition, the polypropylene project also uses domestically produced equipment in many large-scale key equipment such as reactors, carrier gas compressors, circulating gas condensers, and agitators. This has contributed to promoting the localization of Daxie Petrochemical and breaking the industry monopoly of foreign manufacturers on large-scale extrusion granulation units of polypropylene units, and achieved the equipment in place.