There are many types of insulation layers for cryogenic containers, which are mainly selected according to their thermal insulation effect, cost, application environment and other factors. Here are some common types of cryogenic container insulation:
Vacuum layer
This is the most common insulation layer for cryogenic flasks. By creating a vacuum insulation between the bottle and the shell, heat transfer is reduced, which lowers the temperature. At the same time, the vacuum layer protects the contents of the bottle from external influences.
Foam layer
The foam layer is a thermal insulation material that expands the solid foam and fills it between the bottle shell and the bottle body to form a thermal insulation layer. Its thermal insulation effect is better, and the price is lower than that of the vacuum layer.
Atmosphere:
The atmosphere refers to the insulation layer formed by filling the shell and the body of the bottle with air. But usually, the insulation effect of the atmosphere is poor, its structure is simple, and the price is low.
Aluminum silicate fiber insulation felt:
This is a high-temperature insulation material made of alumina, silicate, etc. as the main raw materials, with excellent thermal stability, low thermal conductivity, good performance stability and fire performance.
Polyurethane foam insulation material:
Polyurethane foam insulation material is a high-efficiency and energy-saving insulation material, with low thermal conductivity, good sound insulation effect and waterproof performance, as well as good corrosion resistance and mechanical strength.
Fiber insulation materials such as rock wool, glass wool, and composite silicate:
These materials are widely used in high-temperature insulation projects because they have the characteristics of high temperature resistance.
In addition, thermal insulation materials can also be used for the insulation layer of cryogenic containers, such as foam thermal insulation materials, fiber insulation materials, powder thermal insulation materials, etc. Among them, the foam insulation material is to add a foaming agent to the material to make it foam, form a void inside the material, and achieve the purpose of thermal insulation by changing the thermal conductivity medium from a solid with a large thermal conductivity to a gas with a small thermal conductivity.
The above are just some of the common types of insulation for cryogenic containers, and there may be other types of insulation in practical applications. When choosing the insulation layer, it is necessary to consider the specific use environment, insulation requirements, cost and other factors.
