HOW DOES CLEANING WITH DRY ICE WORK?

The pellets are transported from the hopper by means of a dosing mechanism to the hopper exit. The sub-pressure created in the blast gun causes the pellets to be sucked in gently and then accelerated to a speed up to 300 m/s. This process is done by using a specially developed high performance nozzle onto the surface to be cleaned. On contact, the deposition, because of the extreme low temperature of CO2 (-79ْc), is contracted. As a result of the tension caused by the very low temperature, the deposition layer is loosened. The high speed of the following pellets finally removes the deposition. Therefore the success is based on two factors; the thermal effect and the mechanical effect. However, the original surface is not damaged unlike the sand blasting process. The dry ice pellet, immediately sublimate completely into gas and are released into the atmosphere from where they initially came. So, no residues will be left. The only thing remaining is the removed dirt – this way, waste reduced considerably and time is saved.

What Is Dry Ice?

"Dry Ice," the trademark name for solid carbon dioxide, reaches its solid state when cooled liquid carbon dioxide is put under pressure. Dry ice is pure, solid carbon dioxide (CO2). As a gas, CO2 exists naturally in our environment. It's called "dry ice" because it does not melt. Dry ice goes directly from a solid to a gas in a process called sublimation. Dry ice pellets are made by taking liquid carbon dioxide (CO2) from a pressurized storage tank and expanding it at ambient pressure to produce snow. The snow is then compressed through a die to make hard pellets.

Dry Ice Blasting System

Dry Ice Blasting is known since the seventies in the field of paint stripping from aircrafts. First attempts were made to relieve the aircrafts from old layers of varnish, which were cleaned conventionally through sandblasting. The problematic of the sandblasting technology was, on the one hand, the damage of surface and on the other hand, the enormous high waste disposal costs of the contaminated blast media.

Thanks to the Dry-Ice Cleaning technology, aluminum foundries annually saved millions only due to the fact that expensive moulds could be cleaned without being dismounted and without any damages.

With increasing official requirements regarding working security and healthcare, conventional cleaning processes, like sandblasting, chemical and high-pressure water cleaners could not keep up with the innovative dry ice cleaning technology. Combined with increasing awareness of cost and environment, there’s nothing in the way of the break-through of this high tech cleaning technology.

After three years of research and development work as well as sufficient practice tests under extreme conditions the young and visionary Green Tech team succeeded in developing a dry ice blasting system, which is appropriate for the requirements of the market and industry especially concerning reliability, quality and profitability.

Today the applications are growing day by day. You can clean nearly anything from fine electronics to heavy machinery, from shipyards to tire moulds in the rubber industry and also ovens and production lines in food industry, nuclear power stations and automotive companies benefit already from this environmental friendly and cost saving cleaning technology.

We strongly believe that GREEN TECH achieve market leadership within the next 5 years, because there is an urgent need for:

• Effective,
• Cost and time saving and
• Environmental friendly,

GREEN TECH has licensees all over the world. The company’s 200% growth in each of the last five years proves that this technology provides the perfect solution for the huge demand of most famous industries in the world. Companies like Mercedes, BMW, VW, Audi, Bridgestone, Continental, Siemens and Fererro are already using the GREEN TECH technology.