【Ten Years of Great Progress in Chemical Technology】099-2023: Commissioning of the first phase of China’s first LNG receiving station with a capacity of 10 million tons

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This post was last edited by Desert Fish on 2023-6-28 at 08:24. Ten years of remarkable progress in chemical technology – praise for China’s prosperity and strength! This is just a starting point; more participation from everyone will make things even more lively. Haichuan becomes even better with your involvement; we welcome everyone to join in the discussions on this forum. Everyone should pay attention to safety and know how to handle emergencies. ********************************************* On June 25th, as the LNG carrier LIJMILIYA slowly left the dock, the Tangshan LNG receiving station project, which is under the overall management of CNOOC Engineering, completed the receipt of its first shipment of liquefied natural gas. This marked the commissioning of the first phase of China’s first LNG receiving station with a capacity of ten million tons. The Tangshan LNG project calls for the construction of 20 storage tanks with a capacity of 200,000 cubic meters each, as well as a receiving terminal with a processing capacity of 12 million tons per year and related facilities. At the time it was approved, it was the LNG project in China with the largest designed storage capacity. Phase 1 of the project includes 4 storage tanks with a capacity of 200,000 cubic meters each, a processing plant at the reception facility with an annual handling capacity of 5 million tons, as well as supporting facilities. Once fully operational, the project will become China’s largest LNG receiving and storage center, holding significant practical importance for optimizing the energy structure of the Beijing-Tianjin-Hebei region. 　　During the project construction phase, CNOOC Engineering made full use of its advantages in the entire EPC (design, procurement, and construction) value chain. By leveraging design and construction technologies covered by its own intellectual property rights, and through measures such as design improvements, advancing procurement tasks, and innovating fully automated welding techniques for LNG storage tanks, it ensured smooth project progress; as a result, the construction time for the first storage tank was reduced by nearly a month compared to similar-sized LNG projects in China. For the first time in the country, this project adopted a dual-control-room design scheme, allowing the control-room space for the first-phase and second-phase projects to be shared. This approach solved the problem of streamlining and optimizing multiple professional systems. Through repeated evaluation of the design schemes, an \"optimal solution\" was found from the perspective of intrinsic safety design to address the issues of excessive water hammer forces along the 73-kilometer pipeline network throughout the plant, as well as to balance costs and construction timelines. As a result, a remarkable performance of 8.67 million work hours without any accidents was achieved. 　　During the debugging phase, the project team, through repeated simulations, successfully completed the unloading of the first ship on its own in just 5 days, setting a record for the shortest time required for such an operation in China. For the longest and largest-diameter unloading pipeline in the country, the project adopted a liquid nitrogen spraying-assisted pre-cooling process to successfully overcome the technical challenges associated with commissioning in this industry. It also utilized independently developed simulation technology for pre-cooling large storage tanks, enabling precise control over the pre-cooling rate and thereby reducing operational risks.