【Ten Years of Rapid Development in Chemical Equipment】The first trial run of the 150,000-ton/year nitric acid production plant – a four-in-one unit built under the EPC contract by Shaanxi Gas Turbine Power – was successful, with the steam turbine being replaced by domestic high-speed motors

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Give praise and encouragement to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Great Development in Chemical Engineering Equipment】Continuous updates and summaries available – feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** Overcoming key technical challenges! The national-scale localization renovation project for the nitric acid production facility’s first set of equipment was put into operation on 2025-12-04. The successful implementation of this project not only helped us address long-standing issues such as high energy consumption, difficult maintenance, and reliance on external steam sources in the original turbine-driven system, but it also enabled energy savings, improved control capabilities, and lower-carbon operation through the use of domestically produced variable-frequency drive systems. Here, I would like to express my sincere gratitude and high praise to the SHANGGU team! This is a letter of thanks sent by a user from the northwest. On December 3, following 72 hours of continuous operation testing, the project to replace the turbine in the user’s 150,000 tons per year nitric acid production plant with a domestic high-speed motor – a project that was overseen by Shaanxi Gas Turbine Power – was successfully tested for the first time; the unit went into operation smoothly and reached full production capacity as planned. It marks a significant breakthrough in China’s efforts to achieve full domestic production of high-speed motor drive systems for nitric acid quad-combined units, demonstrating Shaanxi Gas Turbine’s strong capabilities as a key industrial enterprise in the innovation of advanced equipment technologies. Against the backdrop of the further advancement of the \"dual carbon\" strategy, users have expressed a demand for converting gasoline vehicles to electric ones. However, what users need is not a regular modification, but a fully domestic high-speed motor direct-drive solution with better technology and lower costs. Faced with the practical challenge of having no precedents in the domestic market, Shanggu stepped forward with technical confidence to achieve new breakthroughs in domestic alternative technologies. As the first demonstration project in China’s nitric acid industry to achieve full domestic production of high-voltage variable-frequency motors through the conversion from steam drive to electric drive, this project presents high technical challenges, a tight renovation timeline, and complex system integration; it carries the important mission of promoting the use of domestic equipment and facilitating a green, energy-saving transformation. From the initial joint evaluations and technical coordination to equipment manufacturing and on-site commissioning, SHANGU collaborated with customers and other partners to carry out more than 20 in-depth technical discussions, overcoming challenges such as critical speed matching, shafting torsional vibration calculation, and control system integration one by one. A task force was quickly assembled, with project manager Yao Xinyu and technical lead Liu Yuhang at its core. In the severe cold of minus 10 degrees Celsius, the Shaanxi Blower Team remained at the work site, successfully carrying out key tasks such as the installation of motors and frequency converters, the alignment of the units, and the joint testing of individual units and the overall system, thereby using their professional skills to ensure the high-quality progress of the project. Through relentless efforts, the SHANGGU team took practical actions to meet the customer’s needs; it not only successfully completed the conversion of China’s first set of nitric acid production units to use domestically produced high-speed motor drives, but also helped the customer reduce its reliance on steam, thereby cutting both investment and operating costs while enhancing both economic and environmental benefits.