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An Important Milestone in the Progress of the Xiangyu Salt Chemical Industry Upgrade Project – 90% Completion of 3D Model Review Author/Source: Xiangyu Salt Chemical Date: November 8, 2021 Clicks: 29 From November 2 to 5, 2021, in order to meet the requirements of the project’s progress and ensure design quality, China Wuhuan Engineering Co., Ltd. held a meeting to review the 90% complete 3D model for this industry upgrade project. Xie Quanfu, deputy general manager of Wuhuan; Yan Shuanghua, project manager; Peng Jianqiang, member of the Party Committee of Xiangyu Salt Chemicals, deputy general manager and chief engineer; relevant professionals from functional departments and the industrial upgrading project team; as well as patent holders, all participated in this model review meeting via on-site and video conferences. Before the meeting, both parties reached a consensus: the review of 90% of the 3D models represents an important milestone in the project design. All relevant professionals must conduct thorough reviews and optimizations of these 90% of the 3D models, while also addressing each point raised in the reviews of the 60% of the 3D models, to ensure that all requirements for these reviews are met and to create favorable conditions for subsequent on-site construction. During the meeting, the participants grouped themselves according to the requirements and reviewed the 90% scale models of air separation, gasification, purification (conversion, sulfur recovery, cryogenic methanol washing, liquid nitrogen washing, and internal piping systems), synthesis (ammonia synthesis, refrigeration processes), as well as the external piping of the entire plant (including both new and existing plants). They verified one by one the review comments related to 60% of the 3D models, and conducted a thorough review and optimization from the perspectives of process design, electrical systems, instrumentation, water supply and drainage, site layout, and piping. On the basis of meeting the process requirements, they carried out detailed reviews, analyses, and discussions regarding design rationality, operability, plant safety, construction feasibility, operation and maintenance, ultimately reaching a consensus. At this meeting, through the joint review and confirmation of 90% of the project’s 3D models by the owner, patent holders, and design institute, favorable conditions were created for the procurement of bulk materials and the commencement of on-site construction, thereby laying a solid foundation for the steady progress of the project. It marks another significant step forward in the design work for this industrial upgrading project, ensuring that the safety, quality, and timeline of the project are under control, and guaranteeing its successful commissioning from the first attempt. The site selected for the Energy-Saving Technology Upgrading Project of Gasification at Chongqing Xiangyu Salt Chemical Co., Ltd. is Plot B10-05/04 within Management Unit IV of the Longbao Tuituan area in the Wanzhou Salt and Gas Chemical Industrial Park, Chongqing (an open space located to the south of the company’s existing plant). With an investment of 1.5 billion yuan, this project aims to upgrade the existing gasification facilities on this site. Two Jinhua furnaces will be utilized in the project, with a gasification pressure of 6.5 MPaG; the total gas output will reach 80,000 Nm³/h (CO+H₂). This new system will replace the current atmospheric-pressure fixed-bed gasification process. The newly acquired land area for the project is 122,000 m². Additionally, 15,030 m² of existing vacant land within the plant area will be utilized, while the area designated for buildings and structures is 54,820 m² ； An additional plot of land will be created on the south side of the existing plant, where new facilities for coal grinding and slurry preparation, gasification, shift reaction, low-temperature methanol washing, liquid nitrogen washing, ammonia synthesis, and sulfur recovery will be built. An air separation unit will be installed using the existing plant area, and as a result of these upgrades, the total annual production capacity of synthetic ammonia will increase from 200,000 tons to 300,000 tons per year. This project involves technical upgrades to the key machines and equipment that consume the most raw coal and energy, in order to improve their technical performance. High-efficiency catalysts are used, and energy-saving process innovations are applied to existing ammonia synthesis plants to reduce the emission of waste materials, thereby achieving energy savings and reduced consumption. This approach helps to effectively control the overall environmental emissions in the Three Gorges Reservoir area ； This project utilizes advanced international and domestic DCS automation control systems as well as a separate SIS system, which will significantly enhance the level of automation and safety and control, thereby creating favorable conditions for the sustainable development of the enterprise. The project’s technical solution is as follows: for gasification, the advanced 6.5MPa third-generation water-coal slurry pressurized gasification technology developed by Jinhua is utilized; for shift reaction, the most advanced and energy-efficient isothermal sulfur-tolerant shift technology available in China is used ； The purification section utilizes the most advanced low-temperature methanol washing and liquid nitrogen washing processes available both domestically and internationally; the energy-intensive pressure swing adsorption process has been eliminated, as has the copper washing process, whose use is restricted. Ammonia synthesis is carried out using patented technology from Casali in Switzerland, with an operating pressure of ≤15.0 MPa. The compressors are all driven by centrifugal steam turbines, which makes the facility safer, more environmentally friendly, and more energy-efficient.