What is dry ice?
Dry ice: An extraordinary form of solid carbon dioxide (CO2) that exists at an ultra-cold temperature of -78.5 ºC. Typically, this remarkable substance is condensed into a colorless liquid at an impressive pressure of 62.50 bar, before being rapidly transformed into a solid state under low pressure through a process of throttling and depressurization.
Physical properties: Dry ice exhibits an enchanting white crystalline form, effortlessly sublimating at room temperature. With its substantial heat of vaporization, it dramatically cools its surroundings when it sublimates under atmospheric pressure. This fascinating process causes dry ice to liquefy and even further condense moisture from the air as it transitions from solid to gas.
As steam is formed by water vapor droplets or tiny ice crystals clinging to airborne dust, it creates the mesmerizing effect of visible white smoke. The crystal structure of dry ice is simple cubic, falling under the category of molecular crystals, and consists of singular carbon dioxide molecules.
Dry ice crystals can be creatively stacked in various orientations at both the vertices and centers of the cubic structure.
Chemical properties: Dry ice presents a profile of chemical stability, being odorless, non-toxic, non-combustible, and incapable of supporting combustion. However, an elevated carbon dioxide concentration in the air can irritate the respiratory system, lead to accelerated breathing, and pose a risk of suffocation.
A condition known as hypoxia. Carbon dioxide is endowed with high thermal stability, with only 1.8% decomposition occurring even at 2000 ºC. As an acidic oxide, dry ice reacts with water to form carbonic acid, presenting the intriguing properties of acidic oxides.
How is dry ice made?
Liquid carbon dioxide is meticulously extracted from its storage tank and introduced into the ice pressing chamber of the dry ice machine. Throttling through the nozzle gives rise to a voluminous production of gas, carbon dioxide, and snowflake-like dry ice solids. When these solid particles of dry ice accumulate,
Upon reaching a predetermined quantity, the hydraulic system springs into action, compressing the snowflake-shaped dry ice into compact cubes. These are subsequently extruded from the die end. At this juncture, the rotating blade at the dry ice machine's terminal activates, breaking the elongated dry ice column into smaller, manageable pieces,
Forming dry ice pellets of the desired length and size.
There are three main principles of dry ice cleaning:
1. Energy transfer: Dry ice makes contact with the target surface at high velocity, dispersing the impact's kinetic energy. This rapid interaction causes the dry ice particles to swiftly transfer heat with the surface, leading to immediate sublimation of carbon dioxide. Simultaneously, the dirt cools rapidly, contracts, and becomes brittle,
Ultimately being dislodged and washed away.
2. Low temperature cracking: When two distinct materials, each with unique thermal expansion coefficients, experience a temperature disparity, the bond between them begins to break down. In this process, dry ice pellets at -78.5 ºC collide with the material's surface, freezing the dirt until it becomes brittle,
Resulting in the formation of 'cracks' that undermine the mechanical integrity of the adhered dirt, causing it to detach and fall away.
3. Micro explosion: Once dry ice particles infiltrate the dirt's crevices, they sublimate almost instantaneously-within milliseconds-expanding their volume by 600 to 800 times, thereby forcefully lifting the dirt from the object's surface.
Brief explanation of the industry application of dry ice cleaning
Dry ice cleaning is extensively employed for purifying a broad array of surfaces, including metal, molds, industrial equipment, and even ancient cultural relics. This process negates the necessity for cooling or dismantling molds, thus preventing the damage and corrosion often associated with chemical cleaning methods.
Mechanical cleaning techniques frequently pose drawbacks such as causing mechanical abrasion and surface scratches to the molds. Moreover, repeated assembling and disassembling can diminish mold precision. Consider the following illustrative examples:
1.Petrochemical industry: Experience the innovation of dry ice cleaning technology, expertly crafted to cleanse rust and dust from vital equipment like main fans, air compressors, exhaust fans, steam turbines, and blowers within the petrochemical process. This technology eliminates the need to dismantle blades, thus avoiding the hassle of recalibrating them for dynamic leveling.
Effortlessly tackle the challenge of coking and reclaim the efficiency of your heating furnaces and reactors with precision. This remarkable technology also cleans polyvinyl chloride resin off heat exchangers and swiftly eliminates oil and rust stains from compressors, storage tanks, boilers, reactors, condensers, and complex machinery, ensuring your equipment remains in optimal condition.
and dust with unparalleled efficiency.
2.Power system: Revolutionize the way you maintain power systems with dry ice cleaning. It allows for the safe, direct cleaning of indoor and outdoor transformers, insulators, distribution cabinets, wires, and cables, even when they are live up to 37 kV. This method also ensures delicate components like generators, motors, rotors, and stators are impeccably cleaned without sustaining any damage.
3.Food production: Elevate your sanitation standards with dry ice cleaning, which adeptly removes baking residue, gelatinous substances, oil stains, and product mixtures, ensuring pristine ovens, mixing equipment, and conveyor belts. It guarantees your equipment remains clean before the next production run.
Packaging equipment, furnace racks, furnace plates, containers, rollers, inner refrigerator walls, biscuit grates, and more are meticulously cleaned, maintaining hygiene and efficiency in your production line.
4.Automotive and shipping industry: Witness the transformative power of dry ice cleaning on car doors, canopies, carriages, and undercarriages. This method leaves no water residue, preventing water pollution. It effectively cleans carburetors, removes paint, and tackles engine carbon deposits on vehicles and ships, all without harmful chemicals.
Traditional methods require extensive time and involve harmful substances, whereas dry ice cleaning resolves carbon deposition issues in a mere 10 minutes, offering a 100% descaling rate, thus saving time and reducing costs significantly.
Effortlessly maintain your fleet with thorough cleaning of hulls, seawater intake valves, condensers, heat exchangers, engine rooms, and mechanical and electrical equipment, ensuring peak performance and longevity.
5.Aerospace field: From pre-production processes to painting and final assembly of missiles and aircraft, dry ice cleaning is indispensable. It expertly removes paint from composite molds and specialized aircraft, cleans engine carbon, and maintains critical areas like landing gear compartments, ensuring aerospace equipment is handled with precision.
The jet engine conversion system benefits immensely, as it allows direct application on aircraft bodies, significantly saving time and resources.
6.Printing industry: Dry ice cleaning offers a revolutionary solution by removing oil-based and water-based inks and varnishes. It efficiently cleans oil stains, ink deposits, and dyes from gears, rails, and nozzles, ensuring the integrity of printed products and prolonging the lifespan of printing equipment.
This method guarantees that printing equipment remains unscathed, preserving its efficiency and functionality.
Cultural relic cleaning: Dry ice cleaning technology offers a gentle yet effective method to clean soil, soluble salts, mold, and sedimentary films from cultural relic surfaces. Compared to traditional methods, it enhances cleaning efficiency and quality while being environmentally friendly and safeguarding the health of workers.
This innovative approach not only boosts efficiency and quality but also promotes a healthier and more sustainable working environment.
Cleaning method and working principle of CHIRUI pellet dry ice cleaning
Harnessing the principles similar to using steel sand, glass sand, plastic sand, and baking soda, dry ice blasting medium employs high-pressure airflows to accelerate dry ice particles, impacting surfaces with precision. This method is unique due to its impressive ability to vaporize dry ice particles upon impact, ensuring thorough cleanliness.
The uniqueness of this method lies in the instant vaporization of dry ice particles. Upon impact, these particles lose momentum, initiating rapid heat exchange with the surface, leading to
Solid CO2 rapidly sublimates into gas, expanding nearly 800 times in volume within mere milliseconds, creating a 'micro explosion' effect at the impact point. The volatile nature of CO2 is harnessed to ensure maximum cleaning effectiveness and efficiency.
b54ae310
| 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 |
){kind=link}