What is dry ice?
Dry ice is the solid form of carbon dioxide (CO2), appearing as a white, opaque compound at a chilling temperature of -78.5 ºC. This marvel of nature is usually formed by converting gaseous CO2 into a colorless liquid under the immense pressure of 62.50 bar, and then rapidly solidifying it through a controlled process of throttling and depressurization, creating a uniquely fascinating element.
Physical properties: Dry ice, a striking white crystalline substance, sublimates seamlessly at room temperature, releasing a high heat of vaporization. This transformative process dramatically lowers the ambient temperature, causing dry ice to condense and capture moisture from the air, manifesting as a captivating fog or mist.
Steam, a result of water vapor droplets or icy crystals clinging to airborne dust, contributes to the ethereal white smoke associated with dry ice. With its simple cubic crystal structure, dry ice is categorized as a molecular crystal, comprised of singular carbon dioxide molecules, enhancing its stability and aesthetic appeal.
These distinct dry ice crystals are strategically stacked, aligning at the vertices and centers of a cube, forming a robust and intriguing lattice.
Chemical properties: Dry ice stands out for its remarkable chemical stability, being odorless, non-toxic, non-flammable, and non-supportive of combustion. However, an elevated presence of carbon dioxide in the air can irritate the respiratory system, potentially accelerating breathing and posing a suffocation hazard. Therefore, handling it safely is paramount.
At temperatures as extreme as 2000 ºC, carbon dioxide showcases high thermal stability with minimal decomposition (1.8%). Classified as an acidic oxide, dry ice exhibits properties common to such compounds, readily reacting with water to produce carbonic acid, highlighting its versatile chemical interactions.
How is dry ice made?
The creation of dry ice begins with extracting liquid carbon dioxide from its storage tank, channeling it into the ice pressing chamber of specialized dry ice machines. Here, it undergoes a rapid transformation through nozzle throttling, producing an expansive burst of gaseous carbon dioxide and snow-like solid dry ice particles, marking the inception of dry ice.
Upon amassing these snowflake dry ice particles to a specific volume, the precision-engineered hydraulic system is engaged. This system's piston compresses the delicate snowflake forms into robust dry ice cubes, efficiently extruding them from the machine's die end. In tandem, the machine's rotating blade is activated, slicing the elongated dry ice column into practically-sized pieces,
Transforming them into uniform dry ice pellets tailored to required lengths, ready for versatile applications.
There are three main principles of dry ice cleaning:
1. Energy transfer: This principle involves dry ice particles colliding with surfaces at tremendous speed, whereupon they dissipate kinetic energy. The resulting instantaneous heat transfer causes them to sublime, leading to rapid cooling and contraction of dirt, rendering it brittle and susceptible to easy removal.
As the dry ice sublimates, the dirt is efficiently dislodged and washed away.
2. Low temperature cracking: This technique exploits the differing thermal expansion coefficients of materials. When dry ice pellets impact a surface, the frigid temperature induces brittleness in the dirt, breaking the bond between materials.
This creates minuscule 'cracks,' affecting the dirt's mechanical integrity and facilitating its detachment.
3. Micro explosion: Once within dirt fissures, dry ice particles rapidly sublime, causing an explosive expansion-up to 600-800 times their size-peeling dirt from the object's surface.
Brief explanation of the industry application of dry ice cleaning
Dry ice cleaning's versatility makes it invaluable across industries-from cleansing metallic surfaces, molds, and production equipment to preserving ancient relics. This method's non-intrusive nature eliminates the need for mold cooling or disassembly, avoiding corrosion and damage associated with chemical cleaners.
Mechanical cleaning, by contrast, risks scratching and diminishing mold accuracy due to mechanical stress. Here, dry ice cleaning provides a gentle yet powerful alternative, preserving precision and integrity in various applications.
1.Petrochemical Industry: Experience the cutting-edge innovation of dry ice cleaning technology, an advanced solution designed specifically for the petrochemical sector. This technology effortlessly removes rust and dust from critical equipment such as main fans, air compressors, exhaust fans, steam turbines, and blowers. By eliminating the need to dismantle blades, it significantly reduces downtime and prevents the necessity of recalibrating blades for dynamic leveling.
The process seamlessly handles the weighing steps, efficiently removes coking and buildup from various heating furnaces and reactors, and effortlessly cleans polyvinyl chloride resin from heat exchangers. It also effectively eradicates oil and rust stains from intricate equipment, including compressors, storage tanks, boilers, reactors, condensers, and complex machinery, ensuring optimal performance and longevity.
Achieve dust-free environments;
2.Power System: Revolutionizing maintenance with the ability to clean indoor and outdoor transformers, insulators, distribution cabinets, wires, and cables even while under live load (up to 37 kV). This method guarantees pristine cleanliness for generators, motors, rotors, stators, and other components without causing any damage.
3.Food Production: Elevate your food production processes with dry ice cleaning, which adeptly removes baking residue, gelatinous substances, oil stains, and fresh product mixtures pre-baking. It ensures thorough cleaning of ovens, mixing and stirring equipment, conveyor belts, molded products, packaging equipment, furnace racks, furnace plates, containers, rollers, inner walls of refrigerators, biscuit grates, and other vital culinary machinery.
Experience comprehensive cleaning solutions for all your food production needs, enhancing hygiene and operational efficiency.
4.Automotive and Shipping Industry: Enjoy the benefits of superior cleaning for car door covers, canopies, carriages, and bottom oil stains without leaving water residue, effectively preventing water pollution. This innovative solution cleans car carburetors, removes paint from car surfaces, and eradicates engine carbon deposits on vehicles and ships, often necessitating chemical agents.
With a cleaning duration reduced to a mere 10 minutes, this method not only solves carbon deposition challenges swiftly but also reduces costs, achieving a remarkable descaling rate of up to 100%.
Ensure comprehensive cleaning of hulls, seawater intake valves, seawater condensers and heat exchangers, engine rooms, and other mechanical and electrical equipment quickly and effectively.
5.Aerospace Field: Unleash innovation in aerospace production processes with this method tailored for pre-production stages of missile and aircraft painting and final assembly. It offers efficient paint removal for composite molds and specialized aircraft, engine carbon cleaning, and thorough maintenance and cleaning, particularly in the crucial landing gear wheel compartment area. This technique also facilitates paint removal from aircraft shells seamlessly.
Experience enhanced efficiency with the jet engine conversion system, capable of working directly on the body, ultimately saving valuable time.
6.Printing Industry: Experience unparalleled cleaning precision with dry ice technology, adept at removing a variety of oil-based and water-based inks and varnishes. It excels at eliminating oil stains, ink deposits, and dyes from gears, rails, and nozzles, ensuring the highest quality of printed products while preserving the integrity of printing equipment.
Achieve superior print quality without the wear and tear of equipment.
Cultural Relic Cleaning: Dry ice cleaning technology offers a non-invasive, highly efficient method for removing pollutants like soil, soluble salts, mold, and sedimentary films from the surfaces of cultural relic specimens. Compared to traditional physical and chemical methods, this approach not only enhances cleaning efficiency and quality but is also environmentally friendly and safe for workers' health.
This eco-conscious approach ensures preservation quality and promotes a safer working environment.
Cleaning Method and Working Principle of CHIRUI Pellet Dry Ice Cleaning
Much like techniques such as spraying steel sand, glass sand, plastic sand, and baking soda, dry ice blasting medium propels dry ice particles in a high-pressure airflow, targeting the surface to be cleaned with precision. The revolutionary aspect of dry ice cleaning lies in the distinctive way dry ice particles vaporize instantaneously upon impact.
This immediate vaporization causes the momentum of dry ice particles to vanish instantly, facilitating rapid heat exchange between the particles and the surface. This phenomenon induces
the solid CO2 to rapidly sublimate into gas, expanding nearly 800 times its original volume within milliseconds, resulting in a 'micro explosion' that effectively cleans the surface. The volatility of CO2 ensures a thorough and efficient cleaning process.
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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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