Shutdown and major maintenance of the old ammonia synthesis unit at Lutianhua Co., Ltd

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Shutdown and major maintenance of the old ammonia synthesis unit at Lutianhua Co., Ltd. Author/Source: Sichuan Lutianhua Co., Ltd. Date: November 10, 2021. Number of views: 27. In accordance with the company’s major maintenance plan for this winter and next spring in 2021, the load on the old ammonia synthesis unit was gradually reduced starting at 8:20 on November 9, marking the beginning of its annual major maintenance period. This major overhaul of the old system’s ammonia synthesis unit primarily focuses on key maintenance tasks related to the T401B ammonia sphere. In addition, there are 239 major items and 1,657 minor items to be addressed. The planned duration of the maintenance work is 16 days. After a successful restart following a major overhaul on November 27, 2020, the old system ammonia synthesis plant experienced a power fluctuation on the Yanghua line on May 19, 2021, which forced it to shut down. The plant resumed operations at 5:50 on May 20 and continued running until 5:50 on November 9, 2021. In total, it achieved two operating periods lasting 173 days each. To ensure the safe and environmentally friendly shutdown of the old system’s ammonia synthesis plant while minimizing noise pollution, the Production Management Department made meticulous arrangements and planned the shutdown and restart procedures in a rational manner. Technicians in charge were required to remain on-site to oversee the plant’s shutdown process. Shift schedulers coordinated closely both internally and externally regarding utilities such as water, electricity, and steam. Their efforts aimed not only to maintain the stable operation of other ongoing processes but also to ensure a smooth shutdown of the old ammonia synthesis plant, thereby minimizing any impacts caused by fluctuations in utility parameters on those processes. Additionally, they actively cooperated with the company’s environmental protection team in monitoring noise levels around the plant site, providing real-time updates on the shutdown progress. All these measures served to guarantee a seamless transition for maintenance work following the successful shutdown of the old ammonia synthesis plant.