Carbon dioxide liquefied storage tanks are double-walled vessels composed of inner and outer containers, featuring vacuum powder insulation. They are categorized into vertical and horizontal types. The inner container is typically made of 16MnDR material, while the outer container uses Q235-B or 16MnR depending on regional requirements. The interlayer between containers is filled with insulating material (pearlite sand) and vacuum-sealed.
Equipped with a ‘combo safety valve system’, these tanks utilize two safety valves operating simultaneously. During periodic maintenance, one valve can be closed while the other remains operational, ensuring continuous safety. Currently, three primary types are prevalent in the market:
1. Atmospheric Pressure Tanks:
Standard storage vessels for liquid CO₂ under normal pressure conditions.
2.Mother-Child Tanks:
Outer tank: Flat-bottom dome structure.
Inner tank: Comprises multiple cylindrical sub-tanks (pre-fabricated and inspected before on-site installation).
Advantages: Flexible configuration and easier installation.
3.Spherical Tanks:
Both inner and outer tanks are spherical (or outer cylindrical/inner spherical), enabling pressure resistance.
Benefits: High storage capacity, uniform stress distribution, superior load-bearing capacity, and excellent insulation performance.
Note: More complex construction and higher installation requirements compared to other types.
