What's the use of dry ice

Although dry ice is not often seen in daily life, there are still many uses for dry ice. Many students don't understand the use of dry ice. Here are some uses for you.

Use of dry ice

1, the cooling temperature is much lower than that of ice, and the use of "dry ice" can produce a low temperature of -78℃. Moreover, after melting, "dry ice" will not become liquid like ice, but directly evaporate into dry carbon dioxide gas with extremely low temperature, so its refrigeration effect is particularly good. "Dry ice" is now used to preserve perishable food.

2. Dry ice will evaporate when heated, and absorb a lot of heat from the surroundings. When the ambient air temperature drops, water molecules in the air condense when they are cold, and solid substances such as dust in the air condense into small water droplets, forming rainfall.

dry ice

3. Produce smoke, such as the phenomenon that dishes on the table use dry ice to cause smoke, and riding clouds on the stage.

4. Add dry ice when making ice cream, and the ice cream will not melt easily. Dry ice is especially suitable for cold storage of takeaway ice cream.

The food on the plane is preserved with dry ice.

6. Living cell specimens in the biological laboratory are transported in cold storage with dry ice, which is simple to operate and safer and more convenient.

7. In the process of preparing nano-powder, dry ice is added with ethane to prepare low-temperature coolant below -70℃, which provides the necessary low-temperature environment for the production of nano-materials.

8, cooling mechanical parts, which is more common in large mechanical equipment processing plants.

dry ice

9. To grow flowers and vegetables in greenhouses, carbon dioxide fertilizer should be applied.

10, dry ice cleaning industrial equipment. Dry ice cleaning can reduce downtime, reduce equipment damage, effectively clean high-temperature equipment and reduce or reduce the use of solvents.

1 1, medical dry ice is also widely used, such as cryotherapy, hospital plasma preservation and medical drugs.

Hotel dry ice storage method

The temperature of dry ice is MINUS 78 degrees, so if you want to preserve it for a long time, you must have low temperature conditions, otherwise it will be difficult to preserve it for a long time. Some customers will ask, is there any way to keep dry ice longer? If there is an ultra-low temperature refrigerator, the fresh-keeping effect will be better. The lower the temperature, the longer the fresh-keeping time and the longer the effective service life. When buying dry ice, it is usually equipped with a foam incubator to keep a small amount of dry ice.

First, find a comfortable home for dry ice.

It is not necessary to store dry ice in a special storage box, but a thick foam incubator can also have a good effect. You can also put the incubator and dry ice in a cool, dry and ventilated place, or put them in a refrigerator or freezer together with the incubator, which can meet the requirements of storing most dry ice in a light-proof, heat-insulating and moisture-proof environment and is convenient to take and use.

Secondly, environmental factors have a great influence on the storage of dry ice.

Especially the change of temperature has the greatest influence on the preservation of dry ice. A lot of dry ice is wasted, because there is no storage box with good insulation effect and correct operation method. For example, when using dry ice, please press the lid tightly after taking it out, and then seal the box. And remember, don't forget to put dry ice in the air-conditioned room in winter, and keep warm with you. If you do that, the loss of dry ice will accelerate. In addition, if there is too much carbon dioxide gas in the greenhouse, people will have difficulty breathing and suffocate.

Third, the use and operation of dry ice are very particular.

How to prolong the storage time of dry ice and how to preserve dry ice can effectively reduce the volatilization rate of dry ice, thus saving costs. Remember that dry ice cannot be stored in a sealed container. Dry ice is volatile and sublimated into gaseous carbon dioxide, which is 1000 times larger than the solid area. Therefore, dry ice cannot be stored in a container with good sealing performance and small volume, and it is easy to explode. For example, if you put dry ice in a coke bottle and tighten the lid, you can make fried Dan with dry ice. In order to let the gas generated by the volatilization of dry ice be released naturally, it must be placed in a place with good air circulation, so as to be safe.

Expand:

1, the preservation of aviation food generally adopts dry ice refrigeration;

2. Adding dry ice to seafood dishes in star-rated hotels and restaurants can create a white smoke landscape and improve the level of banquets, such as making lobster sashimi;

3. Frozen seafood such as lobster, crab and shark fin. Dry ice is insoluble in water and is cleaner and cleaner when refrigerated, so it is widely used in Europe, America, Japan and other countries.

4. It is easier, safer and more convenient to transport living cell samples in the biological laboratory with dry ice than with liquid nitrogen tank.

5. Dry ice is used to create the cloud effect of stage, film and television, and is widely used in literary and art circles;

6. Dry ice is used for industrial cleaning, which can better remove the scale on industrial equipment such as molds. It is one of the biggest uses of dry ice at present and in the future.