How to save dry ice?

Dry ice is also called solid carbon dioxide, which is 78.5 degrees below zero. It can directly sublimate non-toxic and odorless carbon dioxide gas. At the same time, very low-temperature carbon dioxide gas encounters air at room temperature, and immediately forms a white dense mist, which is beautiful and moving.

"Dry ice" is a common name for solid carbon dioxide. It can obtain an ultra-low temperature of -78.9 ℃ (otherwise). Compared with ordinary ice cubes (0 ℃), it has the characteristics of smaller volume and better cooling effect. It does not produce any water. At the same time, "dry ice" has a bactericidal effect, which can effectively prevent the breeding of bacteria in food and maintain food freshness. At present, "dry ice" is widely used in the preservation, transportation, and storage of fresh food, aquatic products, and processed meat, as well as in the pharmaceutical industry and low-temperature processing of cold-inserted metals.

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How to save dry ice?

Dry ice must be stored in a special freezer, so that dry ice can be stored for 5-10 days. After the storage period has expired, the dry ice begins to form ice masses and even vaporize, and the use effect will be significantly reduced. After each use, be sure to remove the remaining dry ice from the machine and put it in the freezer.

● Never take dry ice directly by hand. Dry ice is extremely cold. Direct contact with the human body for a long time may cause frostbite of human skin tissue.

● Do not store dry ice in tightly sealed, small containers. Dry ice is extremely volatile and generates a gas 1000 times larger than the solid area, which creates huge pressure on the sealed container.

● It is best to dispose of the dry ice directly to make it naturally volatilize, so as to avoid danger of improper storage. If it must be stored, a more commonly used method is to store it in a dry vacuum flask. There is a vacuum insulation between the thermos bottle bladder and the outer bottle wall. The gas generated by the volatilization of dry ice can be released from the gap between the stopper and the bottle wall. To reduce internal pressure. But scientific experiments show that using this method can only save one day and one night.