What is dry ice?
Dry ice: This fascinating compound is solid carbon dioxide (CO2) at a chilly -78.5 ºC. Typically, it is derived from a colorless liquid state at a substantial pressure of 62.50 bar, then swiftly solidified by a process of throttling and depressurization under lower pressure conditions.
Physical properties: Dry ice appears as white crystals that readily sublimate at room temperature, showcasing a high heat of vaporization. This unique property allows it to drastically lower the ambient temperature upon sublimation at atmospheric pressure, leading it to liquefy and even condense airborne moisture.
Steam, when mixed with dry ice, transforms into visible white smoke composed of water vapor droplets or minute ice crystals mingling with dust in the air. Dry ice boasts a simple cubic crystal structure, aligning with molecular crystals, and is made up of singular carbon dioxide molecules.
The unique stacking of dry ice crystals occurs in varying orientations at each vertex and center of its cubic structure.
Chemical properties: Dry ice is noted for its chemical stability, being odorless, non-toxic, non-flammable, and incapable of supporting combustion. However, an elevated concentration of carbon dioxide in the atmosphere may stimulate the respiratory system, leading to increased breathing and potentially resulting in suffocation.
(i.e. hypoxia). Carbon dioxide exhibits remarkable thermal stability, only decomposing by 1.8% even at a scorching 2000 ºC. As an acidic oxide, dry ice reacts with water to form carbonic acid, showcasing the properties inherent to acidic oxides.
How is dry ice made?
The creation of dry ice begins with the extraction of liquid carbon dioxide from its storage tank. This liquid is then sprayed into the ice pressing chamber of a dry ice machine, where it undergoes throttling through a nozzle to generate a large volume of gas, resulting in carbon dioxide and snowflake-like dry ice solids.
Once the solid dry ice reaches a specific quantity, the hydraulic system activates. The piston compresses the snowflake-shaped dry ice into solid blocks, which are then expelled through the machine's die end. At this point, a rotating blade comes into action, breaking the elongated dry ice column into smaller segments.
These segments are then crafted into dry ice pellets of the required length.
There are three main principles of dry ice cleaning:
Energy transfer: As dry ice particles strike a surface at high speed, they dissipate their kinetic energy, resulting in instantaneous heat transfer with the surface. This causes the carbon dioxide to sublimate, rapidly cooling the dirt, which contracts and becomes brittle.
The dirt is washed away effectively.
Low temperature cracking: With varying thermal expansion coefficients between materials, temperature differences can disrupt their adhesion. Dry ice pellets at -78.5 ºC impact surfaces, freezing dirt until it becomes brittle.
Once frozen, dirt begins to melt and burst, producing 'cracks' that alter the mechanical integrity of adhering dirt, leading it to detach from surfaces.
Micro explosion: As dry ice penetrates the fissures in dirt, it sublimates within milliseconds, expanding its volume by a staggering 600-800 times, effectively dislodging the dirt from surfaces.
Brief explanation of the industry application of dry ice cleaning
Dry ice cleaning is extensively applied across industries to eliminate surface contaminants on metals, molds, production equipment, and even historical artifacts. This cleaning method eschews the need for cooling or disassembling molds, thereby avoiding the corrosive harm of chemical cleaning methods.
Mechanical cleaning methods, in contrast, can cause damage such as scratches and mechanical wear on molds, as well as reduced mold precision due to repeated handling. Here are some illustrative examples:
1.Petrochemical Industry: Experience the transformative power of dry ice cleaning technology in the petrochemical sector. Our solutions expertly tackle rust and dust on critical equipment, such as main fans, air compressors, exhaust fans, steam turbines, and blowers, all within petrochemical processes. The ingenuity of this technique means there's no need to dismantle blades, thus eliminating the laborious process of recalibrating blades for dynamic leveling. This ensures optimal performance and efficiency every time.
Streamline operations with our advanced solutions for removing coking in heating furnaces and reactors. Our technology effortlessly cleans polyvinyl chloride resin residues from heat exchangers, ensuring seamless operations. Additionally, it effectively removes oil and rust from compressors, storage tanks, boilers, reactors, condensers, and intricate machinery, ensuring your equipment runs smoothly and reliably.
And dust;
2.Power System: Harness the power of dry ice cleaning for your electrical needs. Clean indoor and outdoor transformers, insulators, distribution cabinets, wires, and cables safely even under live load (below 37 kV). Our non-damaging cleaning method is perfect for generators, motors, rotors, stators, and other components, maintaining their integrity while delivering superior cleanliness.
3.Food Production: Enhance your food production processes with dry ice cleaning. Our method efficiently removes baking residues, gelatinous substances, oil stains, and fresh product mixtures before they enter the oven. Achieve pristine cleanliness for ovens, mixing and stirring equipment, conveyor belts, and molded products, ensuring hygiene and quality in your production line.
Optimize the cleanliness of packaging equipment, furnace racks, furnace plates, containers, rollers, refrigerator inner walls, and biscuit grates. Our advanced technology guarantees impeccable hygiene and efficiency across your equipment.
4.Automotive and Shipping Industry: Discover the convenience of dry ice cleaning for the automotive and shipping sectors. Remove dirt from car door covers, canopies, carriages, and bottom oil stains without leaving behind water residue, thereby preventing water pollution. Efficiently clean car carburetors and strip paint from car surfaces, while our rapid engine carbon deposit cleaning for vehicles and ships eliminates chemical agent use. Solve carbon deposition issues in just 10 minutes, dramatically reducing processing time, cost, and achieving a descaling rate of up to 100%.
Minimize downtime with our quick and effective cleaning solutions, enhancing your operational efficiency.
Maintain pristine cleanliness for hulls, seawater intake valves, seawater condensers, heat exchangers, engine rooms, and mechanical and electrical equipment, ensuring the longevity and functionality of your maritime assets.
5.Aerospace Field: Elevate aerospace operations with pre-production cleaning processes tailored for missile and aircraft painting and final assembly. Our technology facilitates efficient paint removal for composite molds and special aircraft, engine carbon cleaning, and vital maintenance and cleaning, especially within landing gear wheel compartments. Achieve flawless paint removal for aircraft shells with ease, while our jet engine conversion system allows for direct body work, saving valuable time.
Our dry ice cleaning solutions ensure operational excellence, supporting the aerospace industry's high standards.
6.Printing Industry: Revolutionize your printing processes with our dry ice cleaning solutions, capable of removing both oil-based and water-based inks and varnishes, and cleaning oil stains, ink deposits, and dyes on gears, rails, and nozzles. This not only guarantees pristine quality of printed products but also preserves the integrity and lifespan of your printing equipment.
Extend the longevity of your printing machinery while maintaining impeccable product quality.
Cultural Relic Cleaning: Transform cultural relic preservation with our non-destructive dry ice cleaning technology, effectively removing pollutants like soil, soluble salts, mold, and sedimentary films from artifact surfaces. Compared to traditional methods, our innovative solution offers enhanced cleaning efficiency and quality, while being environmentally friendly and safeguarding the health of conservation workers, thereby preserving precious history for future generations.
Our approach ensures a cleaner, safer, and more sustainable preservation process.
Cleaning Method and Working Principle of CHIRUI Pellet Dry Ice Cleaning
Emulating the precision of spraying steel sand, glass sand, plastic sand, and baking soda, our dry ice blasting medium accelerates dry ice particles in a high-pressure airflow, striking the surface with precision. This innovative dry ice cleaning method
exploits the unique property of dry ice particles vaporizing at impact. The instant disappearance of momentum allows for rapid heat exchange between the dry ice and the surface, causing
the solid CO2 to rapidly sublimate into gas. This expansion, nearly 800 times in volume within milliseconds, triggers a 'micro explosion' at the impact point. The inherent volatility of CO2 ensures thorough and efficient cleaning, setting a new standard in cleaning technology.
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| Model |
GT05 |
GT10 |
| Compressed air flow rate |
> 1.1³ /min |
> 2.5³ /min |
| air supply pressure |
0.4-1.0Mpa |
0.6-1.0Mpa |
| Dry ice blasting rate |
0-0.5KG/min |
0-1.0KG/min |
| Dry ice capacity |
5-7.5KG |
12-15KG |
| Dry ice state |
3mm granular |
3mm granular |
| Motor power |
0.37kw |
0.37kw |
| Dimensions (L x W x H) |
512 * 643 * 800 (mm) |
650 * 693 * 900 (mm) |
| Equipment weight |
65KG |
80KG |
| Power supply equipped with |
AC220V/50HZ |
AC220V/50HZ |
| Standard accessory 1 (air connection pipe) |
8m Φ 12mm compressed |
8m Φ 12mm compressed |
| Standard accessory 2 |
Gun handle |
Gun handle |
| Standard accessory 3 |
straight nozzle |
straight nozzle |
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