What is dry ice?
Dry ice: This is the pure white, solid form of carbon dioxide (CO2), maintained at a chilling -78.5 ºC. Typically, it starts as a colorless liquid, condensed under a pressure of 62.50 bar. When released into lower pressure, it rapidly solidifies, captivatingly transforming into dry ice.
Physical Properties: A marvel of nature, dry ice appears as a crystalline white solid that sublimates effortlessly at room temperatures. It carries a high heat of vaporization, enabling it to dramatically drop ambient temperatures. When dry ice transitions from solid to gas at atmospheric pressure, it can condense and liquefy moisture in the air, forming fascinating fog effects.
The visible mist or 'smoke' we often see is a collection of water vapor droplets or minuscule ice crystals clinging to airborne dust. Intriguingly, the dry ice structure forms a simple cubic crystal, a testament to its molecular composition of singular carbon dioxide molecules.
The architectural structure of dry ice sees its crystalline formations strategically positioned at cube vertices and centers, manifesting in various orientations that lend to its unique properties.
Chemical Properties: Dry ice reigns as a chemically stable, odor-free, non-toxic, and non-flammable substance. It doesn't support combustion but in high concentrations, the carbon dioxide it releases can stimulate respiratory activity, increasing breathing rates and posing a potential suffocation risk.
This risk, known as hypoxia, underscores the importance of proper ventilation. Displaying high thermal stability, carbon dioxide is resilient, decomposing a mere 1.8% at a scorching 2000 ºC. As an acidic oxide, dry ice reacts with water to form carbonic acid, reiterating its acidic oxide nature.
How is dry ice made?
The creation of dry ice begins with liquid carbon dioxide sourced from holding tanks. It is then channeled into a dry ice machine's ice pressing chamber. Through a nozzle, rapid throttling occurs, converting some of the liquid into gas and snow-like solid dry ice, an awe-inspiring sight.
Once a sufficient volume of snowflake-like dry ice is accumulated, the machine's hydraulic system springs into action. A piston compresses the snowflake forms into solid dry ice blocks, which are then extruded from the die. At this juncture, rotating blades whir into action, shattering the elongated dry ice columns into desired-sized pellets.
These are then customized into dry ice pellets of the specified length.
There are three main principles of dry ice cleaning:
Energy Transfer: Harnessing the power of velocity, dry ice particles impact surfaces at high speeds, disbursing kinetic energy. This rapid energy exchange causes the dry ice to sublime instantly, cooling and contracting dirt swiftly, leaving it brittle and easy to dislodge.
Ultimately, the dirt is deftly washed away.
Low Temperature Cracking: By exploiting the variance in thermal expansion coefficients, dry ice pellets at -78.5 ºC effectively target the bonds between different materials. As dirt on treated materials becomes frigid and brittle, it fractures, a testimony to the power of temperature-induced separation.
This results in the material melting away and creating 'cracks,' which impair the mechanical integrity of the attached dirt, causing it to detach.
Micro Explosion: In a dynamic feat, dry ice particles penetrate dirt fissures and within milliseconds, sublime. This expansion, increasing volume by 600-800 times, results in a forceful action that strips dirt from surfaces, a remarkable and efficient cleaning mechanism.
Brief explanation of the industry application of dry ice cleaning
The versatility of dry ice cleaning spans across various industries, effortlessly removing stains from metals, molds, production equipment, and even ancient relics. Unlike chemical methods, it avoids mold corrosion or damage, eliminating the need for cumbersome cooling or mold disassembly.
Mechanical cleaning can often lead to mold scratches and decreased accuracy due to repeated handling but dry ice cleaning sidesteps these drawbacks. Here are a few compelling examples:
1.Petrochemical industry: Harness the advanced power of Dry Ice Cleaning Technology to effortlessly eliminate rust and dust from critical equipment like main fans, air compressors, exhaust fans, steam turbines, and blowers in petrochemical processes. This innovative method allows you to clean without removing blades, thus eliminating the hassle of blade recalibration for dynamic leveling.
Experience unparalleled efficiency with our technology: seamless removal of coking in various heating furnaces and reactors. Enjoy effortless cleaning of polyvinyl chloride resin on heat exchangers. Erase oil and rust stains from compressors, storage tanks, boilers, reactors, and condensers, as well as intricate machinery, ensuring peak performance and longevity.
And dust effortlessly and efficiently.
2.Power system: Revolutionize your cleaning process with our Dry Ice Cleaning Machine, capable of directly cleaning live load transformers, insulators, distribution cabinets, wires, and cables (below 37 kV) without disruption. Achieve damage-free cleaning of generators, motors, rotors, stators, and more, ensuring operational integrity.
3.Food production: Enhance the hygiene and quality of your food production line. Our Dry Ice Cleaning effectively removes baking residues, gelatinous substances, oil stains, and fresh product mixtures pre-baking. Perfectly clean ovens, mixing equipment, conveyor belts, and molded products, ensuring immaculate conditions.
Meticulously clean packaging equipment, furnace racks, plates, containers, rollers, refrigerator interiors, biscuit grates, and more, maintaining production excellence.
4.Automotive and shipping industry: Achieve superior cleanliness in cars and ships by removing door covers, canopies, carriages, and bottom oil stains without leaving water residue, preventing pollution. Efficiently clean car carburetors and remove paint from surfaces, ensuring pristine condition. Resolve engine carbon deposits swiftly, saving time and costs.
Traditional methods are lengthy and harmful, while our Dry Ice Cleaning resolves carbon deposition issues within 10 minutes, offering a descaling rate of up to 100%. This method drastically reduces processing time and costs, enhancing operational efficiency.
Ensure thorough cleaning of hulls, seawater intake valves, seawater condensers, heat exchangers, engine rooms, and electromechanical equipment.
5.Aerospace field: Perfect for pre-production processes like missile and aircraft painting and final assembly. Achieve precision in paint removal for composite molds and special aircraft, as well as engine carbon cleaning. Ideal for maintenance and cleaning, especially within landing gear wheel compartments, ensuring operational efficiency.
Efficiently work directly on jet engine conversion systems, saving valuable time without compromising on quality.
6.Printing industry: Our Dry Ice Cleaning ensures the removal of various oil-based and water-based inks and varnishes, effectively cleaning oil stains, ink deposits, and dyes from gears, rails, and nozzles. This not only guarantees superior printed product quality but also preserves the longevity of your printing equipment.
Keep your printing equipment in top condition, free from wear and tear, ensuring optimal performance.
Cultural relic cleaning: With Dry Ice Cleaning Technology, efficiently and non-destructively clean pollutants like soil, soluble salts, mold, and sedimentary films from cultural relic surfaces. Unlike traditional methods, it enhances cleaning efficiency and quality, promoting environmental and worker health.
Achieve superior cleaning efficiency and quality with methods that are environmentally and health-friendly.
Cleaning method and working principle of CHIRUI pellet dry ice cleaning
Embrace the power of dry ice blasting, akin to the precision of spraying steel, glass, plastic, and baking soda. This technology accelerates dry ice particles in high-pressure airflow, effectively impacting and cleaning surfaces. What sets dry ice cleaning apart is its unique process.
The innovation lies in the vaporization of dry ice particles upon impact, where their momentum ceases instantly. A rapid heat exchange occurs between dry ice particles and the surface, initiating an efficient cleaning process.
Solid CO2 sublimates into gas rapidly, expanding nearly 800 times in volume within milliseconds, causing a 'micro explosion' on the impact site. This process, driven by the volatility of CO2, ensures thorough and efficient cleaning every time.
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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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