The liquid nitrogen is derived from air. The main gas components contained in the air are oxygen and nitrogen. Among them, nitrogen accounts for about 78.09% of the air. Liquid nitrogen is liquefied nitrogen. Liquid nitrogen is a liquid cooled by nitrogen compression, and its physical and chemical properties are special. The main features are as follows:
1. Ultra-low temperature: The boiling point of liquid nitrogen is -196 °C.
2. Liquid nitrogen is a colorless, odorless, non-toxic liquid.
3. The permeability of liquid nitrogen is very weak, and human skin will be severely frosted when exposed to liquid nitrogen.
4. Swellability: Liquid nitrogen is produced by air compression and cooling, and can be restored to nitrogen when gasified. It is measured that each liter of liquid is nitrogenated, the temperature rises by 15 ° C, and the volume expansion is about 180 times.
5. Asphyxiating: Nitrogen itself cannot cause suffocation, but too much nitrogen in a certain space will block oxygen, and the operator will cause suffocation. It has been determined that 10 kilograms of liquid nitrogen evaporates instantaneously in a 10 cubic meter room, which can suddenly reduce the space oxygen to 13%, resulting in space hypoxia. Under these conditions, it can cause people to suffocate and even die.
Liquid nitrogen needs to be stored in liquid nitrogen tanks. Due to the special physical and chemical characteristics of liquid nitrogen, liquid nitrogen tanks for storing liquid nitrogen also need to be managed. Below, Panshi liquid nitrogen tank workers will simply talk about the storage of liquid nitrogen tanks as follows:
1. Liquid nitrogen tanks should be stored in a cool, well-ventilated place, and should not be exposed to direct sunlight. When using or storing, it is forbidden to tilt, lie horizontally, invert, pile up, collide with each other or collide with other objects, and handle it gently and keep it upright.
2. The liquid nitrogen tank must be placed in the wooden frame to be padded and fixed during transportation. The tank and the tank are separated by a sponge or the like to prevent bumps and impacts and prevent falling. When loading and unloading the vehicle, it is necessary to prevent the liquid nitrogen tank from colliding, and it is not allowed to be dragged on the ground at will, so as not to reduce the service life of the liquid nitrogen tank.
3. Liquid nitrogen tanks are generally used for storage and transportation. They are mainly used for static storage of indoor liquid nitrogen. They should not be used for long-distance transportation under working conditions.
4. When using a small amount of liquid nitrogen in a short time or a short distance, it can also be temporarily stored in a thermos bottle (cup), etc., but when storing it in a thermos bottle (cup), a toothpick must be cut at the edge of the stopper. A small groove of the same size for the safe discharge of nitrogen.
Sales Manager: Amanda Hou