【Ten Years of Rapid Development in Chemical Equipment】Manufacture of Large-Scale Acrylonitrile AN Reactors from 1958 to 2014

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Witness the ten-year rapid development of chemical processing equipment; praise the prosperity and strength of modern China. Replies will be rewarded – discussions are welcome. ------------------------------------------- On December 27th and 28th, 2014, Ningbo Engineering Company built two AN reactors, which were the largest of their kind in China at that time. These two large custom-made devices, which have identical specifications, each weigh 540 tons, have a diameter of 9.5 meters, and their length is approximately 34 meters. On December 1, 2018, two acrylonitrile (AN) reactors, manufactured under the supervision of Nanjing Sifang Chemical Equipment Supervision Co., Ltd., which is an associate member of the China Equipment Supervision Association, were successfully completed. This reactor is the core equipment for the acrylonitrile (AN) unit in Jiangsu Sierbang Petrochemical Co., Ltd.’s acrylonitrile capacity expansion and technological upgrade project. It has an inner diameter of Φ9550 mm, a total length of approximately 33,845 mm, and a total weight of around 482.7 tons. The main material used for its construction is 15CrMoR. The internal components of the reactor have a complex structure, and their installation must be carried out in a specific sequence. The coaxiality between the distribution tubes of the propylene-ammonia distributor, which is one of the core internal components, and those of the air distribution plate must be checked and verified in accordance with the requirements specified in the drawings and technical agreements; as a result, both manufacturing and inspection processes are extremely challenging.