【Ten Years of Rapid Development in Chemical Technology】Evaporation rate tests completed for China’s first batch of 220,000 cubic meter LNG storage tanks from 2016 to 2023

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Ten years of rapid development 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 forum discussions. Be careful with fire risks as the heat increases in July. --------------------------------------------- On July 18, 2023, with the release of the test report showing a daily evaporation rate of 4.18‰ for Tank No. 2 in the first phase of China National Offshore Oil Corporation’s “Green Energy Port” project in Yancheng, China’s first batch of super-large LNG storage tanks with a capacity of 220,000 cubic meters – designed and built domestically – completed their first evaporation rate tests. This marks another step forward in China National Offshore Oil Corporation’s efforts to achieve high levels of technological self-reliance, further solidifying its leading position in China’s LNG industry. This test imposes strict requirements on the tank pressure, the time the tank remains stationary, and the tank liquid level. The daily evaporation rate of traditional LNG storage tanks with a capacity of 160,000–200,000 cubic meters is typically 5 ‱, whereas the daily evaporation rate of the tanks in this project is as low as 4.18 ‱, indicating better insulation performance compared to other large-scale LNG storage tanks in China. The completion of the evaporation rate tests on the LNG tank, with the evaporation rate meeting the design requirements, indicates that the 220,000 cubic meter LNG tank has been used successfully at the Yancheng \"Green Energy Port.\" This will play a positive role in promoting the development of larger LNG tanks in China. The design temperature for LNG storage tanks is -165°C. To ensure that the storage tank has good thermal insulation properties, different insulation materials are used for the tank’s ceiling, walls, and bottom respectively. Fifteen layers of glass wool are installed under the ceiling of the storage tank, which separates the evaporative gases inside the tank from the tank ceiling and reduces convection between them. Three layers of elastic felt are arranged circumferentially around the storage tank, with expanded perlite filled in between; this not only provides insulation but also compensates for the pre-cooling deformation of the inner tank, serving as a buffer and a protective layer. Five layers of foam glass bricks with pressure-bearing capacity are arranged at the bottom of the storage tank; these bricks not only provide insulation but also bear the entire load of the inner tank and the liquid contained within it.