How to choose a suitable liquid nitrogen tank

In recent years, the low-temperature liquid market has become increasingly prosperous. The sales of liquid oxygen, liquid argon, liquid nitrogen, liquid carbon dioxide and LNG natural gas have increased significantly. Therefore, the profit of oxygen generator by-products is very considerable, and it has become an important part of the non steel commodity income of iron and steel enterprises. The production, storage and transportation of cryogenic liquids cannot be separated from cryogenic storage tanks, which are widely installed and used.

The thermal insulation storage tank is divided into vacuum powder insulation type and atmospheric pressure powder insulation type. Powder insulation uses powder, fiber or foam materials with low thermal conductivity to reduce heat transfer. There are two ways: one is to use general powder insulation (stacking insulation) under atmospheric pressure. The insulation layer is thick, and dry nitrogen is filled to maintain positive pressure to prevent moisture from entering and condensing. It can be applied at least above the liquid nitrogen temperature; Another kind of vacuum powder insulation is to vacuum the space filled with powder, which reduces the heat transfer of gas. At the same time, the powder particles also weaken the radiation heat transfer, making the insulation effect very good.

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Development of cryogenic storage tanks

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Development of cryogenic storage tanks

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Detailed structural explanation of natural gas storage tank

The natural gas storage tank is a double-layer structure tank for storing cryogenic liquid to bear the pressure of medium and the low-temperature tank is made of low-temperature resistant alloy steel (0Crl8Ni9) shell. A certain distance is maintained between the protective layer of the tank and the tank to form an insulation space to bear the gravity load of the tank and medium and the vacuum negative pressure of the insulation layer. The shell is made of vessel steel without contact with low temperature, and the insulation layer is mostly filled with pearlescent sand for high vacuum pumping. The evaporation rate of low-temperature storage tank is generally lower than 0.2%.

Development of cryogenic storage tanks

As an important container for storing liquefied natural gas, the rigor of the structural design of LNG cryogenic storage tank is very important. These close mechanisms are not successful in one step, but developed through continuous exploration and improvement. What about the discovery of cryogenic tanks?

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