1.Patent product 2.Density: >1.45g/cm3 3. production: 100-130kg/h 4. Original: Self design and manufacture. 5.Yield : >40%
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What is the Dry Ice?
Dry ice, sometimes referred to as "Cardice" or as "card ice" is the solid form of carbon dioxide.
Dry ice is used as a cooling agent. Moreover, for some applications, the convenience of its sublimation "into thin air," in contrast to the melt-water left by warming water ice, may outweigh other costs
Manufacture
Dry ice is easily manufactured.There are common steps taken in producing dry ice. First, gases containing a high concentration of carbon dioxide are produced. Such gases can be a byproduct of some other process, such as producing ammonia from nitrogen and natural gas, or large-scale fermentation. Second, carbon dioxide-rich gas is pressurized and refrigerated until it changes into its liquid form. Next, the pressure is reduced. When this occurs some liquid carbon dioxide vaporizes, and this causes a rapid lowering of temperature of the remaining liquid carbon dioxide. As a result, the extreme cold causes the liquid to solidify into a snow-like consistency. Finally, the snow-like solid carbon dioxide is compressed into either small pellets or larger blocks of dry ice.
Dry ice is typically produced in two standard forms: blocks and cylindrical pellets. A standard block weighing approximately 30 kg is most common. These are commonly used in shipping, because they sublimate slowly due to a relatively small surface area. Pellets are around 1 cm (0.4 in) in diameter and can be bagged easily. This form is suited to small scale use, for example at grocery stores and laboratories.
Applications
Commercial
The most common use of dry ice is to preserve food, using non-cyclic refrigeration.
It is frequently used to package items that need to remain cold or frozen, such as ice cream or biological samples, without the use of mechanical cooling.
Moreover, dry ice can be used to flash freeze food, laboratory biological samples, carbonate beverages and make ice cream.
Dry ice can be used to arrest and prevent insect activity in closed containers of grains and grain products, as it displaces oxygen, but does not alter the taste or quality of such foods. For the same reason, it can prevent or retard food oils and fats from becoming rancid.
When dry ice is placed in water sublimation is accelerated, and low-sinking, dense clouds of smoke-like fog are created. This is used in fog machines, at theaters, discothèques, haunted house attractions, and nightclubs for dramatic effects. Unlike most artificial fog machines, in which fog rises like smoke, fog from dry ice hovers above the ground.Dry ice is useful in theater productions that require dense fog effects.
It is occasionally used to freeze and remove warts. However, liquid nitrogen performs better in this role, since it is colder so requires less time to act and less pressure. However, dry ice has the advantage of having fewer problems with storage, since it can be generated from compressed carbon dioxide gas as needed.
Plumbers use equipment that forces pressurised liquid CO2 into a jacket around a pipe; the dry ice formed causes the water to freeze, forming an ice plug, allowing them to perform repairs without turning off the water mains. This technique can be used on pipes up to 4 in (100 mm) in diameter.
Dry ice can be used as bait to trap mosquitoes and other insects, due to their attraction to carbon dioxide.
An alternative method to cooling computer parts is with the use of dry ice. This purpose is overshadowed by more conventional ways with fans, heat transfer fluids, liquid nitrogen, or phase change cooling.
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