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In 2003, China's first set of 270,000 tons/year large-scale double-pressurization domestic nitric acid plant was built in Shanxi Tianji Group. Before this device was put into operation, the Tianji Group had an annual output of 540,000 tons of nitric acid equipment, and all equipment and technology were imported from abroad. In the case that the device could not meet production, it decided to build a new plant with an annual output of 270,000 tons of nitric acid. It is estimated that if a new set of nitric acid plant is introduced from abroad, it will need to invest 320 million yuan, if the investment in the use of localization equipment is about 208 million yuan, compared with the Houtianji Group, it will decide to adopt domestic technology.
After comparing five kinds of production processes, Tianji sees the dual pressure technology that has been listed as a chemical cleaner production technology by the country. Through the implementation of localization technologies, we have developed practical technologies for reducing the absorption of large absorption towers and improving the operational flexibility. We have taken the lead in trials of new types of ammoxidation catalysts and have independently developed a set of manufacturing processes for large-scale tower containers.
The successful operation of the 270,000-ton/year large-scale double-pressurization domestic nitric acid plant resulted in a new annual sales income of RMB 159.84 million for the Tianji Group. At the same time, it will play a positive role in promoting the promotion of dual-pressure technology in China and comprehensively upgrading the technical level of China's nitric acid industry.
The first large-scale domestic nitric acid plant has accumulated rich experience in the international level
On October 14, the industry experts summarized the operation of Shanxi Tianji Group's first large-scale homemade nitric acid plant in China. According to the operation data of more than two years, the main technical and economic indicators of the plant and energy recovery , Automation control, exhaust emissions, etc. have reached or exceeded the world's advanced level, and have accumulated rich and successful experience in building large-scale nitric acid plants in China.