What is dry ice?
Dry ice: This fascinating substance is pure white solid carbon dioxide (CO2) maintained at a chilling -78.5 ºC. Typically, it is condensed into a colorless liquid under high pressure conditions of 62.50 bar, rapidly transitioning into a solid state when exposed to reduced pressure and temperature.
Physical properties: With its captivating white crystalline form, dry ice sublimates effortlessly at room temperature. It boasts a high heat of vaporization, allowing it to swiftly cool its surroundings as it sublimates at atmospheric pressure. This process leads to the condensation and even further liquefaction of water in the air, thanks to the cooling power of dry ice.
When dry ice sublimates, it creates a mesmerizing visual of steam, formed as water vapor droplets or delicate ice crystals adhere to dust particles in the air. Its simple cubic crystal structure, which categorizes it as a molecular crystal, stems from individual carbon dioxide molecules intricately assembled.
The unique and captivating arrangement of dry ice crystals involves stacking these carbon dioxide molecules in various orientations at both the vertices and centers of a cube.
Chemical properties: Dry ice is the epitome of chemical stability. It is odorless, non-toxic, non-combustible, and does not support combustion. However, caution is advised, as excessive carbon dioxide in the air can stimulate the respiratory system, potentially leading to accelerated breathing and suffocation risks.
Dry ice also showcases remarkable thermal stability, with only a minimal decomposition of 1.8% at a scorching 2000 ºC. As an acidic oxide, dry ice interacts with water to form carbonic acid, embodying the distinct properties of acidic oxides.
How is dry ice made?
The production of dry ice begins with liquid carbon dioxide extracted from storage tanks, which is then sprayed into the ice pressing chamber of a dry ice machine. Through the nozzle's throttling, a significant amount of gas is released, forming snowflake-like dry ice solids.
Upon reaching a specific quantity, the hydraulic system kicks into action, with the piston compressing the snowflake-shaped dry ice into solid cubes, which are then pushed out from the machine's die end. At this stage, the machine's rotating blade is engaged, breaking the elongated dry ice columns into manageable pieces.
These pieces are then crafted into dry ice pellets of the desired length, ready for various applications.
There are three main principles of dry ice cleaning:
Energy transfer: Dry ice particles hit the surface to be cleaned with tremendous speed, dissipating kinetic energy upon impact. The rapid heat transfer between the dry ice and the surface causes the sublimation of carbon dioxide, which quickly cools, contracts, and renders the dirt brittle.
This cooling effect is powerful enough to dislodge the dirt, effectively washing it away.
Low temperature cracking: When materials with different thermal expansion coefficients are involved, the temperature difference disrupts their bond. As dry ice pellets, at a frigid -78.5 ºC, strike the surface, they freeze the dirt, causing it to become brittle and susceptible to removal.
The freezing action results in 'cracks' that impair the mechanical properties of the adhering dirt, facilitating its detachment.
Micro explosion: Upon penetrating dirt cracks, dry ice particles sublimate in milliseconds, expanding their volume by 600-800 times, effectively peeling away the dirt from the object's surface.
Brief explanation of the industry application of dry ice cleaning
Dry ice cleaning finds its application across various industries, efficiently purging surfaces of stains on metals, molds, production equipment, and even ancient relics. This cleaning method stands out by not requiring cooling or disassembly of molds, thus preventing corrosion and damage caused by chemical cleaners.
Mechanical cleaning methods, while effective, pose risks such as mechanical damage, scratches, and reduced mold precision from repeated handling. Here are practical examples:
1.Petrochemical industry: Embrace the power of dry ice cleaning technology to effortlessly banish rust and dust from critical equipment such as main fans, air compressors, exhaust fans, steam turbines, and blowers in the petrochemical process. Experience the convenience of cleaning without blade removal, eliminating the hassle of recalibration for dynamic leveling.
Embark on a journey of unparalleled cleanliness with our dry ice cleaning technology! It efficiently tackles coking in various heating furnaces and reactors, while meticulously cleaning polyvinyl chloride resin from heat exchangers. Our solution also expertly eradicates oil and rust stains from compressors, storage tanks, boilers, reactors, condensers, and intricate machinery, redefining maintenance with ease.
And dust;
2.Power system: Experience the cutting-edge of cleaning technology! Our system directly and safely cleans indoor and outdoor transformers, insulators, distribution cabinets, wires, and cables with a live load (up to 37 kV). Delicate components like generators, motors, rotors, and stators are impeccably cleaned without any damage, ensuring peak performance.
3.Food production: Unleash the potential of dry ice cleaning in your food production line! It effortlessly removes stubborn baking residue, gelatinous substances, oil stains, and fresh product mixtures before they hit the oven. This powerful cleaning method revitalizes ovens, mixing and stirring equipment, conveyor belts, molded products, and even more.
Packaging equipment, furnace racks, furnace plates, containers, rollers, the inner walls of refrigerators, biscuit grates, and other essential equipment are restored to pristine condition, ensuring impeccable hygiene and efficiency.
4.Automotive and shipping industry: Discover a new horizon of cleanliness! Our dry ice cleaning method leaves car door covers, canopies, carriages, and bottom oil stains sparkling clean with zero water residue, eliminating water pollution risks. It revitalizes car carburetors, removes paint from surfaces, and clears engine carbon deposits on vehicles and ships without harmful chemicals.
Experience a revolution in processing time and safety! Traditional methods take a minimum of 48 hours and involve harmful chemicals, but our dry ice cleaning tackles carbon deposition in just 10 minutes. It slashes time and costs while achieving a descaling rate of up to 100%, elevating efficiency to new heights.
Ensure peak performance by cleaning hulls, seawater intake valves, seawater condensers and heat exchangers, engine rooms, and mechanical and electrical equipment with unparalleled precision and care.
5.Aerospace field: Elevate the aerospace industry with our dry ice cleaning technology. It's integral to pre-production processes for missile and aircraft painting and final assembly. Expertly remove paint from composite molds and special aircraft, efficiently clean engine carbon, and maintain critical areas like the landing gear wheel compartment. Transform paint removal on aircraft shells with ease.
Effortlessly integrate into jet engine conversion systems. Work directly on the body, saving you precious time and ensuring seamless operations.
6.Printing industry: Elevate your print quality with dry ice cleaning! It expertly removes stubborn oil-based and water-based inks, varnishes, oil stains, ink deposits, and dyes from gears, rails, and nozzles. This method ensures your printing equipment remains unworn while guaranteeing the pinnacle of print quality.
Printing equipment is not worn out.
Cultural relic cleaning: Revolutionize the preservation of cultural relics with our dry ice cleaning technology. It efficiently and non-destructively removes soil, soluble salts, mold, and sedimentary films from the surface of cultural relic specimens. Compared to traditional physical and chemical methods, it enhances cleaning efficacy and quality while being environmentally friendly and safeguarding worker health.
Cleaning efficiency and quality are also more friendly to the environment and the health of workers.
Cleaning method and working principle of CHIRUI pellet dry ice cleaning
Our state-of-the-art dry ice blasting medium accelerates dry ice particles in high-pressure airflow, impacting the target surface much like steel sand, glass sand, plastic sand, and baking soda. This method provides a thorough clean.
What sets it apart is the moment of impact when dry ice particles vaporize. Upon impact, the momentum vanishes, and a rapid heat exchange occurs between dry ice particles and the cleaning surface.
Witness the power of solid CO2 rapidly sublimating into gas. Dry ice particles expand nearly 800 times in volume within a fraction of a second, creating a 'micro explosion' at the impact point. The volatile nature of CO2 ensures remarkable cleaning results.
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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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