【Ten Years of Rapid Development in Chemical Equipment】The nitric acid absorption tower in Section 6 of Lutianhua from 1981 to 2008
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Witnessing the ten-year rapid development of chemical processing equipment, I praise the prosperity and strength of modern China. Wishing everyone a happy New Year, and may their families enjoy peace and health. By contributing our ideas, we can foster more active participation from everyone; HaiChuan becomes even better with your involvement. Everyone is welcome to join in the discussions on this forum. ------------------------------------------------------------------ On the morning of August 2, 2008, the second large-diameter, high-tonnage nitric acid absorption tower in China, developed independently by Sichuan Lutianhua Hongxu Engineering Construction Company, was successfully installed at the construction site of the energy-saving renovation project for Lutianhua Co., Ltd.’s nitric acid production facility after a careful lifting process that lasted 1 hour and 23 minutes. This achievement contributed to the localization of large-scale nitric acid absorption towers. This is the largest, tallest, and heaviest piece of equipment that Lutianhua Hongxu Company has ever developed, manufactured, and mechanically lifted, marking a new level in its capabilities in equipment manufacturing and installation. At the same time, it also signifies a significant improvement in Hongxu Company’s overall capability and competitiveness in undertaking, manufacturing, and installing large-scale key chemical equipment, thereby laying a solid foundation for its expansion into new markets. This large nitric acid absorption tower is the core equipment of the Lutianhua nitric acid clean production and energy-saving renovation project, which is one of the nine key investment projects under Sichuan Chemical Holding Group’s 11th Five-Year Plan. Under the policy guidance aimed at revitalizing the equipment manufacturing industry, Lutianhua Hongxu Engineering Construction Company took on the task of developing and manufacturing this large-scale nitric acid absorption tower locally, with a value of nearly 20 million yuan. This nitric acid absorption tower was manufactured in 6 sections and assembled on-site; it has a diameter of 4.4 meters, a height of 63 meters, and a weight of 262 tons – making its total weight greater than that of the first nitric acid absorption tower produced in China. During its manufacturing process, this tower incorporated a series of key technologies developed through independent innovation, thereby breaking the foreign countries’ long-standing technological monopoly. Among them, technologies such as internal hole welding, coiled tube bending processes, coiled tube installation tools, and tray riveting processes are all domestically innovative, marking new progress on the path toward independent innovation and localization of large-scale chemical equipment. On June 5, Hongxu Company safely transported the large nitric acid absorption tower in 6 sections to the installation site of Lutianhua’s nitric acid plant energy-saving renovation project for assembly and welding. To ensure the successful overall lifting and erection of the nitric acid absorption tower, Hongxu Company carried out extensive preparatory work, made thorough plans, and developed a lifting scheme to guarantee precision at every stage.
In August 2009, Lutianhua Chemical Co., Ltd.’s plant with an annual production capacity of 135,000 tons of dilute nitric acid was put into operation, producing qualified products. Together with the existing plants that produce 40,000 tons of concentrated nitric acid per year and 135,000 tons of *AO acid per year, all three units of the clean production and energy-saving technology upgrade project for Lutianhua’s nitric acid plants are now operational. The energy-saving technological renovation project for clean production in the nitric acid facility is a major project undertaken by Lutianhua Co., Ltd. to adjust its product portfolio, achieve energy savings and reduced consumption, as well as promote clean production. It is also one of the key projects included in Sichuan Chemical Holding Group Company’s development plan for the 11th Five-Year Plan period. The total investment in this project is 250 million yuan. It adopts the world’s advanced double-pressure production process, and new production facilities will be built with an annual capacity of 135,000 tons of dilute nitric acid, 40,000 tons of concentrated nitric acid, and 135,000 tons of *ao acid an, thereby raising Lutianhua’s nitric acid production to a new level. Lutianhua Hongxu Engineering Construction Company was responsible for the construction and installation of the project, as well as the manufacturing of some of the core equipment. Among them, Hongxu Company overcame numerous technical challenges, broke the foreign countries’ years-long technological monopoly, and through independent innovation it developed and adopted a series of key technologies, successfully completing the manufacturing and installation of China’s second-largest nitric acid absorption tower, with a diameter of 4.4 meters, a height of 63 meters, and a weight of 262 tons ； It was the first in the country to develop advanced technologies and processes such as internal hole welding technology, coiled tube bending techniques, coiled tube installation tools, and tray riveting processes, taking new steps forward on the path toward independent innovation and localization of large-scale chemical equipment. The completion and operation of the energy-saving technological renovation project for clean production in the nitric acid facility will enable Lutianhua’s annual production capacity for dilute nitric acid, concentrated nitric acid, and *ao acid an to reach 225,000 tons, 80,000 tons, and 135,000 tons respectively.
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【Ten Years of Great Development in Chemical Equipment】Ongoing update of the summary post; feel free to join the discussion: https://bbs.hcbbs.com/thread-3576046-1-1.html (Source: Haichuan Network – Chemical Industry Trends)