Dry Ice (C02) Blast Cleaning

Dry ice cleaning is a revolutionary cleaning technology that involves the acceleration of dry ice (CO2) pellets in a pressurised jet air stream at the speed of sound, to impact a substrate requiring cleaning. Dry ice pellets are a solid form of Carbon Dioxide (CO2), which is at a temperature of -78.5°C, with a 3mm diameter. The dry ice pellets are inert (non-combustible), non-flammable, non-conductive (making it electrically safe), odourless and non-toxic and is a recycled man-made bi-product of hydrocarbon and ammonia production.

Being a phase change material, the dry ice pellets clean as a solid and sublimates into harmless CO2 gas. This process performs a scrubbing and rinsing action, flushing away all residues. No other cleaning technology currently exists that is able to mimic this action.

During the cleaning process three scientific principles are applied:

  1. Kinetic Effect: Impact Flushing Action of Dry Ice Particles  Uses kinetic energy and sublimates on impact.
  2. Thermal Effect:  On impact the impurities on the surface cool down tremendously, shrink and loosen from the surface. Surface temperatures may fall below the freeze point of the impurities, causing the impurities to lose adhesion.
  3. Sublimation Effect: When dry ice particles strike the surface, they immediately phase from solid into gas. The effect increases the gas volume approximately 800 times. The sudden increase in volume assists in moving the brittle fragments of impurities away from the surface.

Environmental impact

It has been established by EPA studies that CO2 emissions are contributory to the global warming problems of the world. Dry ice cleaning technology uses CO2 that would otherwise be vented to the atmosphere. Therefore, the dry ice cleaning technology does not add any additional CO2 emissions, as the technique uses recycled waste product, then converts it into a usable phase. It is applied as a replacement for traditional hazardous material such as solvents and chemicals which are often linked to environmentally unfriendly results.

Advantages of Dry Ice Cleaning:

  • No damage to the substrate
  • High degree of cleaning with no residue
  • It generates no waste stream
  • It is 100% carbon neutral and environmentally friendly
  • It is completely dust free and moisture free
  • It sterilises the substrate during the cleaning action
  • Cleaning of plant and equipment is undertaken in-situ

Dry Ice Cleaning is ideal for situations where there is concern for the following:

  • Surface abrasion
  • Avoidance of drainage into watershed and storm drains
  • Avoidance of sand and grit entrapment
  • Difficult or excessive clean-up
  • Complexity of the surface to be cleaned
  • Critical production downtime
  • Elimination of rinsing and drying
  • Delicate electrical wiring

Dry Ice Cleaning has a number of industrial applications including:

  • Aerospace
  • Automotive manufacturing
  • General manufacturing
  • Energy and nuclear plants
  • Packaging
  • Food and agriculture
  • Foundry and smelting
  • Construction
  • Marine
  • Oil and petrochemical industries
  • Printing and publishing
  • Semi-conductors

Themba 11kV Indoor Panel and 2 x Panels

Project description: 1kV indoor panel and 2 x panels adjacent at a 33kV/11kV Substation. Project value: Quoted Value R 33 335.00 Project duration: 4 hours spend Dry Ice blasting and another 2 ho

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Substation in Randfontein

Description: After late winter rain fall water seeped through the substation roof and leaked on to main incomer and resulted in a 22x 11kV panel flash Project Value: Quoted value for work complet

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