Talking about the correct use of liquid nitrogen tank
Release time：2018-09-17 Browse：685
Now, the application of liquid nitrogen has become more widespread, and the industry requiring 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. Check before use.
Before filling the liquid nitrogen, 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 liquid media in a liquid nitrogen tank, be sure to close the inlet/drain valve and booster valve. The vent valve must be opened.
4. Transportation of liquid nitrogen in liquid nitrogen tanks.
When liquid nitrogen tank transports liquid nitrogen medium, make sure that the switch status of each valve is the same as that at the time of storage, and please place the base of the package in Under the circle of the container seat, the liquid nitrogen tank container is reliably fixed on the automobile with a rope so that the liquid nitrogen tank does not shake during transportation.
5, liquid nitrogen infusion in 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 When the pressure rises to 0.05 MPa (0.5 kg/cm2), the drain valve is opened, and the liquid can be continuously infused.
6. Check during use.
Always check the condition of the liquid nitrogen tank during use. You can use the eye to observe or touch the shell with your hand. If you find the surface frost, stop it. Use; especially when the inner wall of the neck tube is frosted and icing, it is not advisable to use a knife to scrape it to prevent the inner wall of the neck tube from being damaged, resulting in poor vacuum. Instead, the liquid nitrogen should be taken out to allow it to naturally melt.
