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Nanjing Guochang Chemical Technology held a meeting to review the low-pressure ammonia synthesis process package for Shandong Hualu Hengsheng and to initiate the engineering design. Author/Source: Date: May 18, 2016. Views: 17. On May 3, 2016, a meeting was held at the company to review the 600,000-ton/year low-pressure ammonia synthesis process package and to start the engineering design work. Representatives from Shandong Hualu Hengsheng Chemical Co., Ltd., Nanjing Guochang Chemical Technology Co., Ltd., and Sinopec Nanjing Engineering Co., Ltd. attended the meeting. Lü Zhongming, chairman of Guochang Company, expressed his gratitude to all the representatives who attended the meeting, and stated that he intended to turn this ultra-large-scale low-pressure ammonia synthesis system with independent intellectual property rights into a benchmark project for the industry, thereby driving the development of domestic large-scale low-pressure ammonia synthesis technology. Wei Hongpeng, director of the Engineering Department at Shandong Hualu Hengsheng Chemical Co., Ltd., introduced the company’s two 300,000 tons per year low-pressure ammonia synthesis units. He called for further optimization of the design of these units, building on the GC-HS 1000t/d low-pressure energy-saving ammonia synthesis system, in order to improve their operational parameters and bring them to an internationally leading level. Wang Genbao, deputy chief engineer at Sinopec Nanjing Engineering Co., Ltd., said that by combining the respective strengths and successful experiences of Hualu Hengsheng, Guochang Company, and the engineering firm, this project will be turned into a high-quality one. Moreover, leveraging Sinopec’s platform, domestic ultra-large-scale low-pressure energy-saving technologies will be introduced to international markets. At the meeting, Liu Qijun, the deputy general manager of Guochang Company, provided a detailed introduction to the contents of the process package. The design ammonia purity for this project exceeds 17.5%, while the system resistance is less than 0.8 MPa. For the first time, self-balancing of the steam generated as a by-product, as well as the steam required for the synthesis gas compressors and ice makers, has been achieved. The ammonia synthesis plant essentially achieves “zero power consumption,” representing another significant breakthrough in the development of ammonia synthesis technology! After a thorough review of the process package, the participants from all parties submitted suggestions for improvement, and further clarified the scope, content, depth, and timeline requirements for the engineering design, laying the foundation for the comprehensive engineering design in the next phase.
The turbine is driven by high-pressure superheated steam generated as a by-product of synthesis; more than one ton of steam is produced per ton of ammonia. If the pressure of the purified gas is above 3 MPa and the pressure in the synthesis system is below 15 MPa, it is possible to approach the steam consumption required by the turbine. Of course, in practical engineering applications, boiler steam is also needed to maintain stability