[Haichuan Chemical News] Hoisting of isothermal shift reactor for Fujian gasification project funded at 2.85 billion yuan
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The isothermal shift reactor for Fujian’s coal gasification project, an investment of 2.85 billion yuan, was successfully hoisted into place on April 8. The isothermal shift reactor for Donghua Technology’s large-scale coal gasification project was also installed successfully on that day. At present, the equipment and materials for the fluorination gas project have largely arrived and are ready for use, while the installation work related to pipelines, electrical systems, and instrumentation is also in full swing simultaneously. The isothermal transformation furnace (521R0002) is the core patented equipment of the transformation unit; it has an inner diameter of 3.4 meters, a height of 14.7 meters, and a weight of around 277 tons, making it the heaviest piece of equipment in the transformation unit.
At 11:40 a.m., the isothermal transformation furnace was slowly lifted with the close coordination of a 400-ton crawler main crane and a 500-ton tail truck crane; approximately 30 minutes later, the tower body was made vertical and the tail crane’s hook was released. Subsequently, the isothermal transformation furnace was slowly lifted, moved, and lowered under the traction of a 400-ton main crane, and settled firmly on the frame foundation around 6 p.m. This is another milestone achieved in the project, following the successful installation of the CO cryogenic separation cryostat on March 31.
The large-scale coal gasification project of Fuhua Tianchen Gas Co., Ltd. has a total investment of 2.85 billion yuan. It will enable an annual production of 690,000 tons of ammonia, and water-coal slurry gasification technology will be used for this purpose. The project is scheduled to be completed by the end of December 2020. Once completed, it will supply basic chemical raw materials such as hydrogen, carbon monoxide, and liquid ammonia to various enterprises in the Jiangyin Chemical Park, including Fujian Southeast Electrochemical Co., Ltd. for its new TDI production facility, Fujian Cornell Polyurethane Co., Ltd. for its MDI project, and Fujian Tianchen Yaolong New Materials Co., Ltd. for its new CPL project.
Fujian Fuhua Tianchen Gas Co., Ltd. is located in the Funeng (Jiangyin) Chemical Park within the Fujqing Jiangyin Industrial Cluster in Fuzhou City. It was established as a joint venture among Fujian Petrochemical Group Company, China Tianchen Engineering Corporation, and Fuzhou Yaolong Chemical Group Company, and is engaged in the investment, development, and construction of large-scale coal gasification projects. In addition to the large-scale gasification units, the construction project also includes a large-scale air separation unit that supplies gas products such as nitrogen, oxygen, compressed air, and instrument air to other projects in the park.
On October 16, 2019, at 9:18 a.m. on October 8, with the pouring of the last batch of concrete completed, the main structure of the gasification unit for the Fuhua Tianchen large-scale gasification project, constructed by Sinochem Third Construction Fujian Branch, was successfully completed, achieving the scheduled milestone two days ahead of schedule. Whether the main structural framework of the gasification plant can be completed on schedule plays a crucial role in controlling the overall project timeline and in securing contracts for subsequent works. Through the joint efforts of all employees, 3,600 cubic meters of concrete was poured, 31,000 square meters of formwork was used, and 1,200 tons of steel bars were fabricated and tied. The project met the scheduled milestones two days ahead of schedule and passed the inspection on the first attempt. The main frame of the gasification unit is an 8-story reinforced concrete frame structure, 54 m in height and 51.5 m in length. The concrete strength grade for the frames on the 1st floor is C45, while that for the frames on the 2nd to 4th floors is C40. The concrete strength grade for the structures above the 5th floor is C35. The maximum cross-sectional dimension of the frame columns is 1300 mm × 1300 mm, and the maximum cross-sectional dimension of the frame beams is 800 mm × 1600 mm. The main structural framework of the gasification plant has been completed ahead of schedule, laying a solid foundation for subsequent construction work.
Erection of three gasification units at Fujian Fuhua Tianchen Gasification Project 08:30, December 4, 2019 According to Shaanxi Yanchang Petroleum, on December 1–2, 2019, Shaanxi Yanchang Petroleum Construction and Lifting Company successfully installed three 270-ton gasification units at the Fujian Fuhua Tianchen Gasification Project. The gasifier (512R101) has a diameter of 3.2 meters and a height of 20 meters; its net weight per unit is 270 tons. The main structure is made of SA387Cr11CL2+S31603 material via surfacing, and it can process 1,500 tons of coal per day. The Fuhua Tianchen large-scale coal gasification project uses Shenhua coal as raw material and adopts GE coal slurry gasification technology, with an annual production capacity of 600,000 tons of total ammonia (444,700 tons per year of liquid ammonia, 20,000 m3/h of carbon monoxide, and 40,000 m3/h of hydrogen). Among them, carbon monoxide is used to produce phosgene in the Southeast Electrified Toluene Diisocyanate (TDI) plant ； Hydrogen and nitrogen obtained from air separation are supplied to the ammonia synthesis plant. Part of the liquid ammonia produced by the ammonia synthesis plant is used in the caustic soda and ammonium chloride production plants, another part is supplied to the nitric acid plant, and still another portion of the liquid ammonia, along with hydrogen, is used in the caprolactam plant.
In early June, the first batch of tower equipment for the air separation unit of Fujian Fuhua Tianchen Gas Co., Ltd.’s large-scale gasification project was successfully delivered to the project site. This batch consisted of 4 tower sections supplied by Hangzhou Hangyang Company, namely the upper section of the upper tower, the lower section of the upper tower, the lower tower, and the upper section of the crude argon tower. The largest dimensions of the first batch of tower units delivered were Φ4850*28200 mm, with the heaviest individual unit weighing 113 tons. Fujian Fuhua Tianchen Gas Co., Ltd. is affiliated with Fujian Petrochemical Group Co., Ltd. and was officially established in January 2017. Located in the chemical industry park in the western part of Fuqing Jiangyin Industrial Zone, it is carrying out a project to build a gasification facility with an annual capacity of 690,000 tons of ammonia. As the key project in the planning of the Jiangyin Chemical Park and a major development project for Fuhua Group during the 13th Five-Year Plan period, this large-scale gasification project will, upon completion, supply basic chemical raw materials such as hydrogen, carbon monoxide, and liquid ammonia to the chemical enterprises located downstream in the park. The company has also built a large-scale air separation unit in the Jiangyin Chemical Park, which produces gases such as nitrogen, oxygen, compressed air, and instrument air. Once operational, this facility will help reduce the operating costs of various manufacturing enterprises in the Jiangyin industrial zone and enhance the competitiveness of the products produced there. Large-scale gasification projects utilize state-of-the-art process technologies; the gasification process makes use of the internationally advanced and mature pressurized coal slurry gasification technique. These projects feature high levels of production control, are safe and reliable, allow for easy implementation of process automation and computer control, and involve simple waste treatment methods, thus being environmentally friendly ； PSA hydrogen production utilizes advanced domestic technology, features a high level of automation, and is capable of automatically detecting faults and switching towers accordingly, ensuring safe and reliable operation ； The air separation unit utilizes first-class complete set equipment technology. It adopts a process flow that features low-pressure molecular sieve adsorption, refrigeration through booster turbine expansion, full distillation for argon production, and dual internal compression for oxygen and nitrogen separation; this technology is mature, ensures safe operation, and facilitates easy handling.
The cryogenic tank is one of the key components of an air separation unit, and its installation is of great significance for the entire unit. At present, the construction of Fujian Fuhua Tianchen Gas Co., Ltd.’s project has entered the intensive equipment installation phase. At the site of the air separation unit, the air-cooled towers, water-cooled towers, and molecular sieve adsorbers have been installed; the pipes inside the cryogenic tank have also been prepared in place, and three 1500 m³ liquid storage tanks are being installed one after another. Faced with challenges such as high-position butt welding of the main tower in the cryogenic tank, concurrent operations, and a compact layout, the project team took active measures to coordinate and overcome these difficulties, and on November 2, 2019, the main cryogenic tank of the 75,000 Nm³/h air separation unit was successfully completed. Since the top plate of the cold box is to be lifted as a single unit, this task is quite challenging. The on-site workers made thorough preparations before lifting, and the safety officer set up warning barriers around the lifting area and provided instructions regarding safety procedures before carrying out the work at height.