Sinopec Shanghai Engineering Co., Ltd., Shanghai Jinshende Powder Engineering Co., Ltd., and Yangzi Petrochemical Co., Ltd. recently completed a large-scale PTA (purified terephthalic acid) long-distance conveying engineering research and development project, which was organized by Sinopec Joint Stock Company. The project has passed technical identification and is now being applied in real industrial settings.
PTA is a key raw material for the chemical fiber industry, typically produced as a powder. However, transporting it over long distances using air flow has been a major technological challenge, especially for new installations and plant upgrades. To address this issue, in 2003, Sinopec's Ministry of Science and Technology invited experienced German experts to provide technical guidance. Based on their recommendations, Shanghai Engineering Co. designed and Shanghai Jinshende Powder Engineering Co. constructed a large-scale pneumatic conveying test facility for powder pellets. This advanced system features high integration and flexibility, with its technical level, functionality, and scale ranking among the best globally.
In 2004, during the gas transmission reconstruction project at the Shanghai Petrochemical PTA plant, this technology was successfully implemented. Compared to foreign contractors' bids, the project saved nearly 25% in investment while achieving excellent performance. The success of this project marked a significant step forward in domestic PTA transportation technology.
In 2006, during the expansion of Yangzi Petrochemical’s 450,000-ton-per-year PTA plant, the distance between the PTA production area and the new packaging plant reached 1,100 meters. To solve the long-distance air conveying challenge, all parties involved in the research and development collaborated to refine and optimize the entire PTA long-distance conveying system. After eight months of dedicated work, the project was completed in November 2006 and put into operation. Since then, the system has operated smoothly, proving the reliability and effectiveness of the newly developed technology. This achievement not only enhanced operational efficiency but also set a benchmark for future projects in the industry.
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