What is dry ice?
Dry ice is the white, solid form of carbon dioxide (CO2), boasting a frigid temperature of -78.5 ºC. It is typically condensed into a clear, colorless liquid under a pressure of 62.50 bar, and swiftly transforms into a solid state through a process of throttling and depressurization.
Physical properties: This fascinating white crystalline substance sublimates effortlessly at room temperature, releasing a high heat of vaporization that dramatically chills its surroundings when exposed to atmospheric pressure. As it sublimates, dry ice may even liquefy and further condense moisture from the air.
The ethereal steam, a blend of water vapor droplets or minute ice crystals clinging to airborne particles, gives rise to the visible white smoke. Dry ice exhibits a simple cubic crystal structure, identified as molecular crystals, with lone carbon dioxide molecules elegantly poised.
The unique structure is achieved by arranging dry ice crystals in varied orientations, meticulously placed at the vertices and centers of the cubic form.
Chemical properties: Dry ice stands out for its chemical stability, being both odorless and non-toxic, as well as non-combustible. However, excessive carbon dioxide levels in the air can irritate the respiratory system, causing rapid breathing and a potential risk of suffocation.
In instances of hypoxia, the thermal stability of carbon dioxide proves significant, with only 1.8% decomposing at an intense 2000 ºC. As an acidic oxide, dry ice exhibits classic acidic oxide properties, reacting with water to yield carbonic acid.
How is dry ice made?
Liquid carbon dioxide, obtained from dedicated storage tanks, is channeled into the ice pressing chamber of a dry ice machine. Throttling via the nozzle creates a surge of gas and snowflake-like dry ice solids, which steadily accumulate.
Once a sufficient quantity is gathered, a hydraulic system springs into action, compressing the snowflake-shaped dry ice into solid cubes and guiding them through the die end. Here, a rotating blade engages, shattering the elongated dry ice column into manageable fragments.
These fragments form into dry ice pellets of the desired length, ready for use in a variety of applications.
There are three main principles of dry ice cleaning:
Energy transfer: At remarkable speeds, dry ice impacts the target surface, transferring kinetic energy. The particles facilitate rapid heat transfer, causing immediate sublimation of carbon dioxide. This results in the dirt swiftly cooling, contracting, and becoming brittle.
Facilitating the effective removal of the dirt.
Low temperature cracking: Distinct materials with varying thermal expansion coefficients develop a temperature-induced separation. Dry ice pellets, at a chilling -78.5 ºC, hit the material surface, freezing the dirt until it shatters.
This leads to melting and bursting, creating cracks that alter the mechanical integrity of the adhering dirt, causing it to detach.
Micro explosion: Following their penetration into dirt fissures, dry ice particles sublimate in mere milliseconds, expanding dramatically by 600-800 times, effectively lifting and removing dirt from the object's surface.
Brief explanation of the industry application of dry ice cleaning
Dry ice cleaning is a versatile solution for eliminating surface stains on various materials, including metals, molds, industrial equipment, and even ancient artifacts. It eliminates the need for mold cooling or disassembly, thus preventing corrosion and damage from chemical methods.
Mechanical cleaning often results in mold damage, scratches, and reduced accuracy from repeated handling. Here are a few notable examples:
1.In the petrochemical industry, our top-of-the-line dry ice cleaning technology offers a state-of-the-art solution for meticulous cleaning of rust and dust on pivotal equipment. This includes main fans, air compressors, exhaust fans, steam turbines, and blowers within the petrochemical processes. Our advanced method eliminates the need to remove blades for cleaning, thus foregoing the tedious and time-consuming recalibration for dynamic leveling.
Our cutting-edge technology simplifies weighing steps, effortlessly tackles coking and debris in various heating furnaces and reactors, and provides an immaculate cleanse for polyvinyl chloride resin on heat exchangers. It proficiently removes oil and rust stains from an array of equipment including compressors, storage tanks, boilers, reactors, and condensers, ensuring spotless performance for complex machinery.
and dust with precision.
2.In the power system sector, our machine offers an unparalleled cleaning solution. It deftly cleans indoor and outdoor transformers, insulators, distribution cabinets, wires, and cables even under live load conditions (up to 37 kV). Our technology guarantees non-damaging cleaning for components such as generators, motors, rotors, and stators, ensuring peak operational efficiency.
3.In food production, our dry ice cleaning machine is a trusted ally. It effectively eradicates baking residues, gelatinous materials, and stubborn oil stains, preempting contamination before baking in ovens. It ensures thorough cleaning of ovens, mixing and stirring equipment, conveyor belts, and molded products, delivering unyielding hygiene and sanitation.
Our machine excels in cleaning packaging equipment, furnace racks, furnace plates, containers, rollers, inner walls of refrigerators, and biscuit grates, ensuring immaculate cleanliness across the board.
4.Within the automotive and shipping industry, our specialized cleaning machine offers superior cleanliness for car door covers, canopies, carriages, and oil-stained vehicle bottoms, all without leaving water residues or causing pollution. It also expertly attends to carburetor cleanliness and excels in the swift removal of paint from car surfaces, ensuring engines, cars, and ships are pristine and primed.
Traditional methods suffer from prolonged processing times, often exceeding 48 hours, and harmful chemical exposure risks. Our dry ice cleaning technology overcomes these challenges, resolving carbon deposits efficiently within a mere 10 minutes. This not only conserves time and slashes operational costs but also guarantees a staggering descaling rate of up to 100%.
The machine is adept at cleaning ship hulls, seawater intake valves, condensers, heat exchangers, engine rooms, and various mechanical and electrical equipment, ensuring comprehensive marine maintenance.
5.In the aerospace field, our machine streamlines pre-production cleaning for missiles and aircraft, including painting and final assembly. It excels in paint removal for composite molds and special aircraft, engine carbon cleaning, and meticulous maintenance, particularly in sensitive areas like the landing gear wheel compartment. It also facilitates efficient paint removal from aircraft shells.
Our jet engine conversion system operates directly on the body, drastically saving time without compromising the integrity of the surface.
6.In the printing industry, dry ice cleaning is a revolutionary approach for removing oil-based and water-based inks and varnishes. It adeptly cleans gear oils, ink deposits, and dyes on gears, rails, and nozzles, not only ensuring the superior quality of printed products but also prolonging the lifespan of printing equipment.
Our technology ensures that printing equipment remains free from wear and tear, maximizing operational longevity.
In the field of cultural relic cleaning, dry ice technology offers an efficient, non-destructive method for removing pollutants like soil, soluble salts, mold, and sedimentary films from cultural relic surfaces. This method surpasses traditional physical and chemical cleaning by enhancing cleaning efficiency and quality, while also being more environmentally friendly and safe for workers.
Our approach not only boosts cleaning efficiency and quality but also aligns with environmental safety standards, safeguarding worker health.
The method and working principle of CHIRUI's pellet dry ice cleaning system
Operating akin to spraying steel sand, glass sand, plastic sand, and baking soda, our dry ice blasting medium accelerates dry ice particles in a high-pressure airflow, impacting and cleansing the target surface with precision. The unique edge of dry ice cleaning
Lies in the instantaneous vaporization of dry ice particles upon impact. The momentum of these particles dissipates effectively, and a rapid heat exchange occurs between the particles and the surface, resulting in an efficient cleaning process.
As solid CO2 sublimates swiftly into gas, the dry ice particles expand nearly 800 times in volume in mere thousandths of a second, creating a 'micro explosion' at the impact site. The volatility of CO2
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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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