What is dry ice?
Dry ice is a fascinating substance made of solid carbon dioxide (CO2), which takes a pristine white form at the chilling temperature of -78.5 ºC. Normally condensing into a colorless liquid under a high pressure of 62.50 bar, it undergoes rapid solidification when exposed to lower pressures, creating a uniquely cool phenomenon.
Physical properties: This captivating white crystalline form of dry ice is known for its tendency to sublimate easily at room temperature. It holds a high heat of vaporization, allowing it to dramatically reduce the ambient temperature as it transitions from solid to gas at atmospheric pressure. During this process, it has the ability to liquefy and even further concentrate water in the air, resulting in a visible transformation.
As dry ice sublimates, it creates steam-an enchanting plume formed by water vapor droplets or fine ice crystals mingling with dust particles in the air, resulting in the iconic white smoke. The crystal structure of dry ice is categorized by a simple cubic formation that belongs to the family of molecular crystals, involving individual carbon dioxide molecules.
The remarkable arrangement of dry ice crystals involves stacking these molecules in diverse orientations at both the vertices and centers of the crystalline cube.
Chemical properties: Dry ice boasts a profile of remarkable chemical stability. It is odorless, non-toxic, and non-combustible, also lacking any propensity to support combustion. However, elevated carbon dioxide concentrations can stimulate the respiratory system, inducing rapid breathing and posing potential suffocation risks.
This phenomenon, known as hypoxia, underscores the high thermal stability of carbon dioxide, with only 1.8% decomposition taking place even at the extreme temperature of 2000 ºC. As an acidic oxide, dry ice possesses characteristics typical of acidic oxides, reacting with water to form carbonic acid.
How is dry ice made?
The creation of dry ice starts with the extraction of liquid carbon dioxide from its storage tank, which then gets sprayed into the press chamber of the dry ice machine. The throttling effect via the nozzle results in a significant expansion of gas, producing carbon dioxide, alongside snow-like dry ice solids. As these accumulate,
Once a sufficient quantity is reached, the hydraulic system springs into action, with the piston compressing the snowflake-shaped dry ice into solid cubes. These cubes are extruded through the die end, where the machine's rotating blade comes into play, delicately breaking the elongated dry ice column into desired segments.
These segments are fashioned into dry ice pellets of the required length.
There are three main principles of dry ice cleaning:
Energy transfer: As high-speed dry ice strikes the surface to be cleaned, it expends its kinetic energy, facilitating an ultra-rapid heat exchange with the target surface. This causes the dry ice to sublime instantaneously, with the dirt undergoing swift cooling, contraction, and brittleness,
leading to it being efficiently washed away.
Low temperature cracking: When different materials possess distinct thermal expansion coefficients, temperature variations can disrupt the adhesion between them. Dry ice pellets, at a frigid -78.5 ºC, impact the treated material's surface, freezing the dirt until it becomes fragile,
and subsequently melting and bursting. This process induces 'cracks' which alter the mechanical properties of the adhering dirt, causing it to detach and fall away.
Micro explosion: As dry ice particles infiltrate dirt cracks, they sublimate in mere milliseconds, explosively expanding their volume by 600-800 times. This dynamic reaction effectively dislodges the dirt from the object's surface.
Brief explanation of the industry application of dry ice cleaning
The versatility of dry ice cleaning is reflected in its widespread use across various applications. It efficiently eradicates surface stains from metals, molds, production equipment, and even ancient artifacts. This cleaning approach eliminates the need for cooling or disassembly, thereby preventing corrosion and damage that might occur with chemical cleaning methods.
Traditional mechanical cleaning methods often come with drawbacks such as potential mechanical damage or surface scratches, and a decrease in mold accuracy due to repeated handling. In contrast, dry ice cleaning mitigates these issues. Here are some examples:
1.Petrochemical industry: Harness the revolutionary power of dry ice cleaning technology to effortlessly eliminate rust and dust from essential equipment such as main fans, air compressors, exhaust fans, steam turbines, and blowers within the petrochemical process. This method requires no removal of the blades, thereby obviating the need for recalibration due to dynamic leveling. Enjoy the benefits of maintenance that is as efficient as it is incisive, with maximum uptime and minimal hassle.
Embrace a seamless cleaning process that tackles every challenge in the petrochemical sector. From the removal of coking and its residues in diverse heating furnaces and reactors, to the meticulous cleaning of polyvinyl chloride resin on heat exchangers, this dry ice cleaning solution excels. Extract stubborn oil and rust deposits from critical equipment including compressors, storage tanks, boilers, reactors, condensers, and intricate machinery, ensuring optimal performance and longevity.
Efficiently eradicates dust,
2.Power system: Revolutionize your maintenance routine with a cleaning solution that safely and directly cleans both indoor and outdoor transformers, insulators, distribution cabinets, wires, and cables under live load conditions below 37 kV. This advanced technology ensures that generators, motors, rotors, stators, and other components are meticulously cleaned without damage, enhancing reliability and extending service life.
3.Food production: Elevate food safety and quality with dry ice cleaning that adeptly removes baking residues, gelatinous substances, and oil stains. Prior to baking, efficiently cleanse ovens, mixing and stirring equipment, conveyor belts, and molded products. These capabilities are complemented by the cleaning of packaging equipment, furnace racks, furnace plates, containers, rollers, refrigerator interiors, biscuit grates, and more, ensuring hygienic standards are consistently met.
Optimize kitchen operations with this versatile solution, which also addresses the needs of packaging equipment, furnace racks, furnace plates, containers, rollers, and the inner walls of refrigerators.
4.Automotive and shipping industry: Experience the power of dry ice cleaning that leaves no water residue, thereby eliminating the risk of water pollution. This innovative solution efficiently cleans car door covers, canopies, carriages, and bottom oil stains. It also excels in cleaning car carburetors, removing paint from vehicle surfaces, and eradicating engine carbon deposits on both vehicles and ships. Unlike traditional methods, this process involves no harmful chemicals, reducing processing time from 48 hours to a mere 10 minutes while achieving a descaling rate of up to 100%.
This method significantly outperforms traditional techniques, offering a remarkable reduction in time and cost. With a descaling rate of up to 100%, it completely resolves carbon deposition issues in just 10 minutes.
Clean every aspect of your maritime assets, from hulls and seawater intake valves to seawater condensers and heat exchangers, engine rooms, and mechanical and electrical equipment, ensuring peak performance and longevity.
5.Aerospace field: Elevate aerospace maintenance and production with dry ice cleaning, ideal for pre-production processes in missile and aircraft painting and final assembly. This solution efficiently removes paint from composite molds and special aircraft, cleans engine carbon deposits, and performs maintenance in critical areas like the landing gear wheel compartment. Experience swift paint removal from aircraft shells and enjoy seamless operations and time savings when working directly on the body.
Optimize your processes with the jet engine conversion system, designed to work effortlessly on the body, ensuring time and resource efficiency.
6.Printing industry: Redefine print quality with dry ice cleaning that removes a range of oil-based and water-based inks and varnishes, while also cleaning oil stains, ink deposits, and dyes on gears, rails, and nozzles. This method not only ensures the superior quality of printed products but also prolongs the life of printing equipment by preventing wear and tear.
Preserve the integrity of your printing equipment, ensuring it remains free from wear and tear, while maintaining exceptional product quality.
Cultural relic cleaning: Transform how you care for priceless artifacts with dry ice cleaning technology. This method effectively and non-destructively cleans pollutants such as soil, soluble salts, mold, and sedimentary films from cultural relic specimens. Compared to traditional cleaning methods, it significantly improves both cleaning efficiency and quality, while being more environmentally friendly and safer for workers.
Experience an eco-friendly approach that enhances cleaning efficiency and quality, nurturing both the environment and the health of workers.
Unlock the cleaning potential of CHIRUI's pellet dry ice cleaning method, a marvel of modern engineering.
Similar to the dynamics of sandblasting with steel, glass, plastic, or baking soda, this method propels dry ice particles via high-pressure airflow, impacting the target surface with precision. This dry ice cleaning technique is unprecedented.
The uniqueness of dry ice cleaning lies in its ability to vaporize dry ice particles instantly upon impact. The momentum dissipates as dry ice particles rapidly exchange heat with the cleaning surface, leading to an effective cleaning action.
Solid CO2 sublimates swiftly into gas, with dry ice particles expanding nearly 800 times in volume within milliseconds, creating a 'micro explosion' on impact. This property of CO2 is pivotal.
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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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