Talking about the correct use of liquid nitrogen tank
Nowadays, the application of liquid nitrogen has become more and more extensive, and the industry that needs liquid nitrogen is also increasing. However, liquid nitrogen cannot be preserved under normal circumstances and needs to be stored and transported in a special container, which is a liquid nitrogen tank. So, what is the correct way to use liquid nitrogen tanks?
1. Inspection before use.
Before filling the liquid nitrogen tank, the liquid nitrogen tank should first check whether the outer casing is recessed or not, and whether the vacuum exhaust port is intact. If it is damaged, the degree of vacuum will decrease. In severe cases, the intake air will not be insulated, so that the upper part of the tank will be frosted, the liquid nitrogen loss will be large, and the value of continued use will be lost. Next, check the inside of the tank. If there is any foreign matter, it must be taken out to prevent the inner tank from being corroded.
2. Filling of liquid nitrogen.
Be careful when filling liquid nitrogen. For new tanks or tanks that are in a dry state, they must be slowly filled and pre-cooled to prevent the liner from being damaged too quickly and reducing the service life. Do not pour liquid nitrogen on the vacuum vent when filling liquid nitrogen to avoid a drop in vacuum. The stopper is made of heat-insulating material, which can prevent liquid nitrogen from evaporating and can also act as a fixed lifting cylinder, so the wear should be minimized during the switch to prolong the service life.
3. Storage of liquid nitrogen in liquid nitrogen tanks.
When storing the liquid medium in the liquid nitrogen tank, be sure to close the inlet/drain valve and the pressure increasing valve. The vent valve must be opened.
4. Transportation of liquid nitrogen in liquid nitrogen tanks.
When the liquid nitrogen tank transports the liquid nitrogen medium, it is necessary to ensure that the opening and closing state of each valve is the same as that during storage, and the base of the packing box is placed under the circle of the container seat, and the liquid nitrogen tank container is reliably fixed on the automobile by the rope. The liquid nitrogen tank will not be shaken during transportation.
5. Infusion of liquid nitrogen in a liquid nitrogen tank.
If you want to output liquid nitrogen from a liquid nitrogen tank, please follow the procedure below: close the vent valve; open the booster valve; observe the pressure gauge; open the drain valve when the pressure rises to 0.05 MPa (0.5 kg/cm2) , that is, continuous infusion.
6. Inspection during use.
During the use, the condition of the liquid nitrogen tank should be checked frequently. You can use the eye to observe or touch the shell with your hand. If you find that the surface is frosted, stop using it. Especially when the inner wall of the neck tube is frosted, it is not advisable to use a knife to scrape. The inner wall of the neck tube is damaged, resulting in a vacuum, but the liquid nitrogen should be taken out to allow it to naturally melt.
