What is dry ice?
Dry ice is the solid form of carbon dioxide (CO2), appearing as a pristine white solid at a chilling -78.5 ºC. It is typically converted into a colorless liquid under a hefty pressure of 62.50 bar before being swiftly solidified via low-pressure throttling and depressurization.
Physical properties: As white as snow, dry ice sublimates effortlessly at room temperature. Its high heat of vaporization means that as it sublimates at atmospheric pressure, it dramatically reduces the surrounding temperature. During this transition, dry ice causes surrounding moisture to liquefy and even condense more water from the air.
Steam, the product of water vapor droplets or tiny ice crystals clinging to airborne dust, gives rise to visible white smoke. The crystal configuration of dry ice is a simple cubic form, categorized under molecular crystals, composed of individual carbon dioxide molecules.
The dry ice's unique structure involves stacking its crystals in diverse orientations at both the vertices and centers of the cube.
Chemical properties: Dry ice is a marvel of chemical stability. It is odorless, non-toxic, and non-flammable, offering no support for combustion. However, a high concentration of carbon dioxide in the air can stimulate the respiratory tract, leading to rapid breathing and potential suffocation risks.
Carbon dioxide showcases outstanding thermal stability, decomposing only 1.8% at an intense 2000 ºC. As an acidic oxide, dry ice interacts with water to form carbonic acid, integrating the characteristics of acidic oxides.
How is dry ice made?
The journey of dry ice creation begins with liquid carbon dioxide, drawn from its storage tank and released into the dry ice machine's pressing chamber. As the liquid passes through a nozzle, throttling action produces a burst of gas, carbon dioxide, alongside snowflake-like dry ice solids.
Upon amassing a sufficient quantity, the hydraulic system springs to life, pushing the piston to compact the snow-like dry ice into solid cubes, which are then extruded through the die end. At this juncture, the machine's rotating blade swings into action, breaking the elongated dry ice column into pieces.
These pieces form the desired length of dry ice pellets.
There are three guiding principles of dry ice cleaning:
Energy transfer: At high velocity, dry ice slams onto the surface, dissipating kinetic energy. With rapid heat exchange, dry ice sublimates instantly, causing dirt to chill rapidly, contract, and become brittle, priming it for removal.
Dirt is subsequently washed away.
Low temperature cracking: With distinct thermal expansion coefficients, two materials can experience weakened bonds due to temperature variance. When dry ice pellets (-78.5 ºC) strike the treated material's surface, they freeze dirt until it brittles,
causing cracks which compromise the dirt's mechanical properties, ensuring its detachment.
Micro explosion: As dry ice particles infiltrate dirt cracks, they sublimate within mere thousandths of a second, explosively expanding their volume by 600-800 times, effectively stripping dirt off the object's surface.
Brief explanation of the industry application of dry ice cleaning
Dry ice cleaning excels in purging various surfaces of stains, whether on metal, molds, production gear, or even ancient artifacts. This cleaning marvel circumvents the need for cooling or mold disassembly, preventing the corrosive and damaging effects of chemical cleaning.
Contrasting mechanical methods, dry ice cleaning avoids potential mechanical damage or scratches to molds, as well as accuracy loss from repeated loading. Some illustrative examples include:
1.Petrochemical industry: In petrochemical processes, dry ice cleaning is adept at removing rust and dust from equipment like main fans, air compressors, exhaust fans, steam turbines, and blowers, eliminating the need to disassemble blades or recalibrate them for balance.
Explore the multifaceted cleaning prowess of our machine: Effortlessly remove coking from heating furnaces, reactors, and more; Clean polyvinyl chloride resin on heat exchangers. Eliminate oil and rust stains from compressors, storage tanks, boilers, reactors, condensers, and intricate machinery, ensuring they operate at peak efficiency.
Additionally, it tackles dust with remarkable efficiency.
2.Power system marvel: Safely and effectively clean transformers, insulators, distribution cabinets, wires, and cables in live conditions (below 37 kV); Tackle generator, motor, rotor, and stator components without inflicting any damage, guaranteeing spotless results and uninterrupted operation.
3.Food production sector: With precision, dry ice cleaning erases baking residue, gelatinous substances, oil stains, and fresh product mixtures pre-baking. Achieve superior hygiene with effective cleaning of ovens, mixers, stirring equipment, conveyor belts, and molded products.
Efficiently clean packaging equipment, furnace racks, plates, containers, rollers, refrigerator interiors, biscuit grates, and much more, ensuring impeccable sanitary conditions.
4.Automotive and shipping industry excellence: Clean car doors, canopies, carriages, and undercarriages without water residue, preventing water pollution. Achieve pristine car carburetors and paint surfaces. Remove engine carbon deposits from vehicles and ships effectively, without the long processing times and harmful chemicals of traditional methods.
Drastically reduce cleaning time from 48 hours to just 10 minutes with dry ice cleaning, offering up to 100% descaling efficiency, maximizing time and cost savings.
Thoroughly clean hulls, seawater intake valves, seawater condensers and exchangers, engine rooms, and mechanical equipment, ensuring peak performance.
5.Aerospace field innovation: Optimize pre-production processes for missile and aircraft painting and assembly. Efficiently remove paint from composite molds and special aircraft, clean engine carbon, and conduct maintenance, especially in critical areas like landing gear compartments. Achieve pristine paint removal from aircraft shells.
Enable seamless jet engine conversion directly on the body, saving valuable time and resources.
6.Printing industry refinement: Effortlessly eliminate oil-based and water-based inks, varnishes, oil stains, ink deposits, and dyes on gears, rails, and nozzles with dry ice cleaning, ensuring superior print quality.
Protect printing equipment from wear and tear, extending its lifespan.
Cultural relic cleaning revolution: Utilize dry ice cleaning to non-destructively and efficiently remove pollutants like soil, salts, mold, and sediments from cultural relics. It's kinder to the environment and the health of workers, surpassing traditional cleaning methods in both efficiency and quality.
Experience enhanced cleaning efficiency and environmental friendliness, safeguarding both artifacts and health.
Unveiling the cleaning method and working principle of CHIRUI's pellet dry ice cleaning.
Akin to abrasive techniques like steel sandblasting, dry ice cleaning propels dry ice particles in a high-pressure airflow to impact the targeted surface. However, the magic of dry ice cleaning lies in its ability to vaporize instantaneously upon impact.
This unique process involves a rapid heat exchange between the dry ice and the surface, causing dry ice particles to sublimate into gas almost instantaneously, resulting in a powerful 'micro-explosion' that effectively cleans without residue.
The dramatic volume expansion of solid CO2 into gas, nearly 800-fold within milliseconds, facilitates thorough cleaning without secondary waste. It leaves only the dislodged debris behind, ready for easy collection.
Thus, the dry ice cleaning process is an environmentally conscious choice, eliminating secondary waste and ensuring only the targeted dirt is removed and collected.
| 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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