Design of 3 000 m3 Liquid Carbon Dioxide Spherical Storage Tank
In China,liquid carbon dioxide spherical storage tanks are mostly 400～2000 m3,and the steel used in the equipment shell is limited to the low-temperature pressure vessel with the lower tensile strength of 16 MnDR,15MnNiDR and 15MnNiNbDR below 530 MPa.The equipment has the thick wall plates,large weight,high construction cost,and difficulty in large-scale development.It summarizes the design of the first 3000 m3 large liquid carbon dioxide spherical storage tank in China,which includes the selection of spherical shell steel plate,pipe forging and supporting welding consumables,the structural design of the spherical tank,overall and local stress analysis,the size control in the manufacturing and installation process,the welding requirements,non-destructive testing and post-weld overall stress relieving heat treatment control indexes,etc.,which is a reference for the localized research and development of the large liquid carbon dioxide spherical tanks of more than 3000 m3.
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