Safe handling of liquid nitrogen, liquid nitrogen containers
Editor:adminClick：
Time:2019-03-15 13:20
we are China manufacturer of vacuum frozen liquid nitrogen containers and liquid nitrogen sprayer for low temperature semen, cell, sperm, sample storage, widely used in hospital, lab and vets, biology company, cryothorapy treatment, liquid nitrogen ice cream food . If any interests, please contact me! ivy@pchaoinstrument.com Thank you!
(1) Precautions for use of liquid nitrogen:
1 Liquid nitrogen is a low-temperature product, and it is necessary to prevent frostbite during use.
2 in liquid nitrogen operate and access frozen items quickly, pay attention to light handling, so as not to thaw the items, causing unnecessary losses.
3 In a room where liquid nitrogen is used and stored, it should be well ventilated to avoid space anoxia and cause suffocation.
Safe handling of liquid nitrogen,liquid nitrogen containers
Liquid nitrogen is a special industrial product widely used in precision instrument manufacturing and medicine and food.
Industrial and agricultural production, daily life, mainly frozen storage media. Liquid nitrogen is derived from air, the main gas contained in the air
The composition is oxygen and nitrogen, wherein nitrogen accounts for about 78.09% of the air. Liquid nitrogen is liquefied nitrogen.
1. Liquid nitrogen characteristics: Liquid nitrogen is a liquid cooled by nitrogen compression, and its physical and chemical properties are special. Main features such as
under:
1 ultra-low temperature: liquid nitrogen has a boiling point of -195.8, and it can absorb 48 calories per kilogram when the liquid is nitrogenized.
2 liquid nitrogen is a colorless, odorless, non-toxic liquid.
3 The permeability of liquid nitrogen is very weak, but when the human skin is exposed to liquid nitrogen, it will be severely frostbitten.
4 Expansibility: Liquid nitrogen is made by compression and cooling of air, and it can be restored to nitrogen when it is vaporized. It is measured that each liter of liquid nitrogen Gasification, temperature rise of 15 ° C, volume expansion is about 180 times.
5 asphyxiating: Nitrogen itself cannot cause suffocation, but in a certain space, if there is too much nitrogen to isolate oxygen,
The author also causes suffocation. It has been determined that 10 kg of liquid nitrogen evaporates instantaneously in a 10 m3 room, which makes the space oxygen burst.
However, it fell to 13%, causing space hypoxia. Under these conditions, it can cause people to suffocate and even die.
Safe handling of liquid nitrogen,liquid nitrogen containers
Safe handling of liquid nitrogen,liquid nitrogen containers
2, liquid nitrogen storage: liquid nitrogen storage types can be generally divided into storage tanks, transport tanks. Storage tanks are mainly used for indoor liquids
The static storage of nitrogen should not be used for long-distance transportation under working conditions; in order to meet the transportation conditions, the transportation tanks are mainly specialized.
The shockproof design, in addition to static storage, can also be used for transportation under the condition of filling liquid nitrogen, but should avoid violent collision and
Vibration; in addition, when using a small amount of liquid nitrogen in a short time or a short distance, it is also possible to temporarily use a thermos bottle (cup) or the like.
Put, but when storing with a thermos (cup), etc., a small toothpick-sized groove must be cut at the edge of the stopper for nitrogen.
The safety of gas is discharged.
3. Safe use of liquid nitrogen: Under normal circumstances, when liquid nitrogen is stored in a sealed tank, care should be taken to retain the liquid nitrogen tank.
There must be a certain gap, otherwise the gas will not be discharged in time when the liquid is nitrogenized, which is very likely to cause an explosion accident. Generally, the lid of the liquid nitrogen tank is left.
There are certain gaps, and don't block them when you use them.
(1) Precautions for use of liquid nitrogen:
1 Liquid nitrogen is a low-temperature product, and it is necessary to prevent frostbite during use.
2 in liquid nitrogen operate and access frozen items quickly, pay attention to light handling, so as not to thaw the items, causing unnecessary losses.
3 In a room where liquid nitrogen is used and stored, it should be well ventilated to avoid space anoxia and cause suffocation.
4 due to Liquid nitrogen is not bactericidal, so utensils that come into contact with liquid nitrogen should be disinfected. 5 liquid nitrogen tanks must be fixed during transportation. To prevent vibration and reverse. 6 liquid nitrogen tanks should be carefully replenished with liquid nitrogen when storing items for a long time.
(2) Maintenance and use of the container:
1) During the use, the use of the tank should be checked every day and the tank bottle should be found.
1) During the use, the use of the tank should be checked every day and the tank bottle should be found.
There are water drops and frosting on the top or upper part, indicating that there is a problem with the quality of the tank. Stop using it immediately; no water drops or knots in the tank. In the case of frost, you can touch the outer casing by hand. If the upper part is cold and the lower part is hot, this also indicates that the quality of the tank has certain problems. That is, the daily increase of liquid nitrogen is large, it should be observed to prevent liquid nitrogen loss, it is best to stop using it; at the same time, in daily use, Also refer to the relevant pressure vessel safety technical inspection regulations, and regularly check the liquid nitrogen tank and safety equipment instrument accessories. Check to make sure it is safe and sound.
2) Carefully check the safety instruments and accessories related to the container before use, when the instrument and accessories are Under normal conditions, the required pressure and capacity can be properly grasped and adjusted; if the appearance of frost is found, it should be immediately stopped using, timely inspection and repair.
3) liquid nitrogen tank before filling liquid nitrogen, first check the shell for recession,
3) liquid nitrogen tank before filling liquid nitrogen, first check the shell for recession,
Whether the vacuum exhaust port is intact; if it is damaged, the vacuum will be lowered. In severe cases, the intake air cannot be insulated, so that the upper part of the tank will form frost, the loss of liquid nitrogen will be large, and it will lose the value of continued use; when filling liquid nitrogen, it is impossible to pour liquid nitrogen into the vacuum exhaust port. In order to avoid a decrease in the degree of vacuum; at the same time, a small amount of liquid nitrogen in the tank before the filling of the liquid nitrogen is kept in a pre-cooled state.
4) liquid nitrogen tanks to be stored
Keep in a cool, well-ventilated place and do not expose to the sun. Due to its precision and inherent properties, it is used or when storing, it is strictly forbidden to tilt, cross, invert, stack, collide with each other or collide with other objects. The tank is upright.
5) For long-term storage, it is necessary to replenish liquid nitrogen regularly. When replenishing, the residual amount of liquid nitrogen should generally be
One third of the quantity is appropriate. 6 When putting in or taking out frozen items, try to make the opening time of the tank opening as short as possible to reduce liquid nitrogen consumption. Consumption, do not put the lifting tube completely. 7 It is strictly forbidden to place objects on the container lid and seal the neck. 8 It is strictly forbidden to use hard objects. In addition to the frost inside the neck tube, so as not to damage the neck tube. 9 liquid nitrogen tanks are only used to hold liquid nitrogen, and no other liquids or mixed storage is allowed.
Safe handling of liquid nitrogen,liquid nitrogen containers
Safe handling of liquid nitrogen,liquid nitrogen containers
(3) Transportation: 1 When transporting, use liquid sponge or other padded items to fix the liquid nitrogen tank to prevent it from falling over. 2 correct
The use of transport tanks (YDS-XB) prohibits the use of storage tanks for transport tanks.
| liquid nitrogen | liquid nitrogen container | liquid nitrogen tank |
| liquid nitrogen | liquid nitrogen container | liquid nitrogen tank |
| liquid nitrogen | liquid nitrogen container | liquid nitrogen tank |
| liquid nitrogen | liquid nitrogen container | liquid nitrogen tank |
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