Cracks in nitrogen storage tank
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This post was last edited by jocysong on 2019-3-13 09:27. I would like to ask about the criteria for selecting air-cooled vaporizers and the factors that influence such choices. I recently encountered a strange incident: a nitrogen storage tank at 0.80 MPa suffered from brittle fracture. See the simplified flowchart for details. I would like to ask the experts under what circumstances a vaporizer fails, allowing liquid nitrogen to enter the gas storage tank and resulting in the rupture of that nitrogen storage tank. Thank you!
1. Is the vaporization volume of the air-temperature type carburetor low? 2. There is a pressure regulator connected between the liquid nitrogen tank and the carburetor, used to adjust the volume of vaporization
Destroy! Pressure and temperature cause low-temperature brittle fracture! Danger! !
How can we determine that it was liquid nitrogen that entered the storage tank? For example, if liquid nitrogen bypasses the vaporizer and pressure reducer, it will rapidly vaporize as it passes through uninsulated pipes, causing the pressure in those pipes to rise sharply. The vaporization of liquid nitrogen absorbs a large amount of heat, which leads to severe icing on the outer walls of the pipes. Has this kind of issue occurred in your system?
Q The pipeline from the carburetor to the storage tank is very short, only about 5 meters. In the event of an accident, on-site operators observed white gas coming from the break in the storage tank, and the pipeline was also frozen over.
Yes. I know it’s low-temperature brittle fracture; what I want to know is the circumstances! If the vaporizer does not vaporize properly, liquid nitrogen will quickly enter the storage tank. The carburetor works fine under normal conditions of use. This device has been in use for many years. Moreover, the factory has several such systems. Are there any standard requirements for selecting a carburetor, and how is it calculated? ?
Severe icing in the vaporizer reduces heat transfer efficiency, resulting in some liquid nitrogen failing to vaporize and ending up in the gas storage tank.
I don’t know how to choose a carburetor; it needs to have a large margin, and according to the label, the capacity should be somewhat higher than that required by the engine.
Freezing only happens when there’s a problem! There isn’t any under normal circumstances! !
Could it be that the ferrite content in the welds or heads of the nitrogen tank is too high?