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Successful first commissioning of the air separation unit at Pingmei Shenma Polycarbonate Plant Author/Source: Date: 2021-08-09 Clicks: 5 At 17:16 on July 31, 2021, the air separation unit as part of the 100,000-ton per year polycarbonate production project in the first phase of Henan Pingmei Shenma Polycarbonate Materials Co., Ltd. was successfully commissioned for the first time, producing qualified products; the purity of nitrogen and oxygen reached 99.9999% and 99.9% respectively, completing this milestone 10 days ahead of schedule. This unit is primarily responsible for supplying oxygen and nitrogen to downstream production facilities such as gas generation, PC, and bisphenol A production units. The unit employs the widely used in industrial applications cryogenic air separation technology, including an air compression system, a pre-cooling system, a molecular sieve purification system, and a distillation tower system. It features advanced technical performance parameters, as well as good safety characteristics, high reliability, and significant energy-saving effects. Its designed production capacity is 11,000 Nm3/h of nitrogen and 1,400 Nm3/h of oxygen. To ensure the successful production of qualified products during the first trial run, starting from March 11, 2020, when the first pile was driven for the air separation unit, the numerous employees involved in the project construction gave up their holidays, braved severe cold and scorching heat, and worked together to overcome various challenges such as the pandemic and the rainy season. They successfully completed the preliminary tasks including the commissioning of the air compressor units, the joint testing of the pre-cooling and purification systems, the cooling process using cold boxes, and the filling with perlite sand, thus laying a solid foundation for the smooth operation of the entire air separation unit. At present, the air separation unit is operating smoothly, with all product specifications meeting the required standards.