What is dry ice?
Dry ice, a fascinating marvel of nature, is essentially white solid carbon dioxide (CO2) maintained at a chilling -78.5 ºC. Typically, it is condensed into a colorless liquid at a remarkable pressure of 62.50 bar and swiftly solidifies through a process of throttling and depressurization under low pressure.
Physical properties: Dry ice, a white crystalline wonder, sublimates effortlessly at room temperature and boasts an impressive heat of vaporization. This property allows it to dramatically lower the surrounding temperature when it sublimates at atmospheric pressure. Consequently, dry ice not only liquefies but also further condenses moisture from the air during sublimation.
As steam forms from water vapor droplets or small ice crystals affixing themselves to airborne dust, a visible white smoke emerges. The crystal structure of dry ice is characterized by a simple cubic formation, classified as molecular crystals. It is composed of single carbon dioxide molecules.
In this structure, dry ice crystals are intricately stacked in various orientations at both the vertices and centers of each cube.
Chemical properties: Dry ice is renowned for its chemical stability, being odorless, non-toxic, and non-combustible. It does not support combustion. However, a high concentration of carbon dioxide in the air can irritate the respiratory system, hasten breathing, and potentially lead to suffocation.
This condition, known as hypoxia, is a risk when carbon dioxide levels are elevated. Carbon dioxide itself exhibits remarkable thermal stability, with only a 1.8% decomposition rate at 2000 ºC. As an acidic oxide, dry ice reacts with water to yield carbonic acid.
How is dry ice made?
In the fascinating production of dry ice, liquid carbon dioxide is carefully drawn from the storage tank and sprayed into the ice pressing chamber of the dry ice machine. The process of throttling through the nozzle generates a significant amount of gas and exquisite snowflake-like dry ice solids. As these solids accumulate,
Once a sufficient quantity is amassed, the hydraulic system springs into action, compressing the snowflake-shaped dry ice into solid cubes. These cubes are then precisely squeezed out from the die end. At this point, the rotating blade of the dry ice machine is employed to skillfully shatter the extended dry ice column into perfectly sized pieces.
The result is dry ice pellets tailored to the desired length, ready for various applications.
There are three main principles of dry ice cleaning:
1. Energy transfer: This principle harnesses the high-speed impact of dry ice against surface areas, dissipating kinetic energy upon contact. The dry ice particles undergo an instantaneous and intense heat transfer with the surface, inciting the carbon dioxide to sublime rapidly. The dirt subsequently cools, contracts, and becomes brittle,
allowing it to be effectively washed away.
2. Low-temperature cracking: When two distinct materials with differing thermal expansion coefficients are exposed to temperature discrepancies, the bond between them weakens. Dry ice pellets, chilled to -78.5 ºC, impact the material's surface, freezing the dirt until it becomes brittle,
forming 'cracks' that impair the mechanical properties of adhering dirt, facilitating its removal.
3. Micro explosion: As dry ice particles penetrate dirt cracks, they sublimate within mere milliseconds, expanding their volume by up to 800 times. This rapid expansion effectively peels the dirt away from the object's surface.
Brief explanation of the industry application of dry ice cleaning
The versatility of dry ice cleaning finds application across various industries, proficiently removing surface stains from metal, molds, industrial equipment, and historical artifacts. This cleaning technique eliminates the need for cooling or disassembling molds, preventing the risks of corrosion and damage that accompany chemical cleaning methods.
Traditional mechanical cleaning methods pose drawbacks, such as causing mechanical damage and scratches to molds, and diminishing mold precision due to recurrent handling. Explore some specific examples:
1.Petrochemical industry: The groundbreaking dry ice cleaning technology is adept at removing rust and dust from critical equipment like main fans, air compressors, exhaust fans, steam turbines, and blowers within petrochemical processes. This method eliminates the need to dismantle blades, ensuring that recalibration for dynamic leveling is unnecessary.
Introducing our comprehensive cleaning solutions: Effectively eliminate coking and residues from diverse heating furnaces and reactors. Expertly cleanse heat exchangers of polyvinyl chloride resin build-up. Our cutting-edge technology also removes oil and rust stains from compressors, storage tanks, boilers, reactors, condensers, and intricate machinery with unmatched precision.
and dust;
2.Revolutionize power system maintenance: Seamlessly clean indoor and outdoor transformers, insulators, and distribution cabinets, even under live load conditions below 37 kV. Our advanced cleaning technology ensures the integrity and longevity of generators, motors, rotors, and stators, delivering a pristine finish without any damage.
3.Elevate food production hygiene: Masterfully remove baking residues, gelatinous substances, and oil stains, while preserving the quality of fresh product mixtures. Our dry ice cleaning solution is ideal for ovens, mixers, stirring equipment, conveyor belts, and molded products, ensuring impeccable cleanliness.
Flawlessly clean packaging equipment, furnace racks, furnace plates, containers, rollers, refrigerator interiors, and biscuit grates with superior efficiency.
4.Transform automotive and maritime industries: Our dry ice cleaning technology eradicates oil stains from car door covers, canopies, and carriages without water residue, preventing water pollution. Clean car carburetors and remove paint with precision. Engine carbon deposits on vehicles and ships are swiftly eliminated, enhancing performance.
Experience the future of cleaning: While traditional methods take up to 48 hours and pose health risks, our dry ice cleaning technology resolves carbon deposition in just 10 minutes. Achieve unparalleled efficiency with a descaling rate of up to 100%, maximizing time and cost savings.
Achieve thorough cleaning of hulls, seawater intake valves, seawater condensers and heat exchangers, as well as engine rooms and electromechanical equipment, for optimal performance and longevity.
5.Pioneering aerospace maintenance: Facilitate pre-production processes for missile and aircraft painting and final assembly with precision. Our solution effortlessly addresses paint removal for composite molds and specialized aircraft, as well as engine carbon cleaning and maintenance, especially in the wheel compartment area.
Our jet engine conversion system works directly on the aircraft body, saving valuable time while ensuring peak performance.
6.Revolutionize the printing industry: Dry ice cleaning effectively removes oil-based and water-based inks and varnishes, tackling ink deposits, oil stains, and dyes on gears, rails, and nozzles. This process not only ensures the exceptional quality of printed products but also safeguards equipment longevity.
Our technology guarantees that printing equipment remains free from wear and tear, maintaining consistent performance.
Cultural relic preservation redefined: Dry ice cleaning technology provides a non-invasive and effective solution for removing pollutants such as soil, soluble salts, mold, and sedimentary films from cultural relic surfaces. It significantly surpasses traditional methods, offering increased efficiency and quality.
Our environmentally friendly solution prioritizes the health of workers while maintaining the integrity of cultural artifacts, setting new standards in preservation.
Discover the innovative cleaning method and working principle of CHIRUI pellet dry ice cleaning
Embrace cutting-edge technology: Similar to traditional abrasive methods, our dry ice cleaning accelerates dry ice particles in high-pressure airflow to impact and clean surfaces. The distinction lies in the instantaneous vaporization of dry ice upon impact.
This rapid transformation results in a unique, efficient cleaning process. Dry ice particles vaporize, causing a significant heat exchange, culminating in a powerful cleaning action.
With solid CO2 rapidly sublimating into gas, dry ice particles expand up to 800 times within mere milliseconds, triggering a 'micro explosion' that efficiently removes dirt without secondary waste.
Our process is environmentally conscious, generating no secondary waste and leaving only the collected dirt, ensuring an eco-friendly and efficient clean.
| 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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