Principle of air transport liquid nitrogen tank
For example, the liquid nitrogen biological container biological transport series has liquid nitrogen adsorption materials in the tank. When liquid nitrogen is poured in, these materials can adsorb the liquid nitrogen. Even if the tank is tilted or tipped during transportation, it will not cause liquid nitrogen to overflow, thus ensuring the safety of the sample.
Preparations before using air transport liquid nitrogen tanks
Before using air transport liquid nitrogen tanks to store samples, you need to prepare. First, take out the bucket from the container, then weigh and record the weight. Then inject liquid nitrogen into the container until the liquid level reaches the bottom of the neck tube. After standing for 12 hours, inject liquid nitrogen into the container again until the liquid level reaches the bottom of the neck tube. After standing for another 12 hours, pour out the remaining liquid nitrogen, weigh it, and record the weight. Subtract the first weighing weight from the last weighing weight, and then divide it by 0.808 to get the actual liquid nitrogen storage adsorbed by the liquid nitrogen adsorbent. Compare the calculated actual liquid nitrogen adsorption value with the theoretical liquid nitrogen adsorption value. If the deviation between the two is not large, it can be determined that the liquid nitrogen adsorbent is saturated. If the deviation between the two is large, it is necessary to inject liquid nitrogen into the container again. When the liquid level reaches the bottom of the neck tube, let it stand for another 2 hours, then pour out the remaining liquid nitrogen, and it can be used normally.
Precautions for using liquid nitrogen tanks for air transportation
In order to ensure the safety of air transportation, liquid nitrogen tanks must meet the dangerous goods rules formulated by ICAO and be properly packaged and marked. During transportation, liquid nitrogen tanks should be placed vertically to avoid shaking, and should be fully inspected before loading to ensure that the tank is not damaged or leaking. In addition, liquid nitrogen tanks should also avoid adverse conditions such as high temperature, humidity, and vibration to maintain their good performance. Airlines also need to take a series of safety measures when transporting liquid nitrogen tanks, such as formulating special safety management plans, training relevant employees, and re-inspecting liquid nitrogen tanks before flights take off. These measures together ensure the safety and reliability of liquid nitrogen tanks for air transportation. Liquid nitrogen tanks for air transportation are an efficient and safe sample transportation tool that can ensure the freezing quality of samples during transportation, providing great convenience for scientific research, medical and other fields.