Dry Ice

Dry Ice

In many cases dry ice can replace hydro jetting, chemical cleaning, brushing, mechanical cleaning
or sand blasting. The cleaning waste is limited to the removed matter, since the dry ice vaporizes
and therefore doesn’t generate any additional waste.

 

Advantages:
• Removal of oxides
• Removal of paint / dirt
• Pretreatment
• Roughening of material surfaces
• Environmentally friendly cleaning solution
• Less waste
• In-door & In-line cleaning without dust
• Stable production quality
• Automated production lines

Dry Ice Blasting Process

The function principle
The dry ice blasting procedure or dry ice cleaning is
nonabrasive contrary to traditional blasting
techniques such as sand blasting meaning no
components of the cleaning surface get removed.
Compressed air accelerates the dry ice pellets to
almost 1000 km/h and they get blasted directly on to
the work piece that needs cleaning. Making contact
with the surface three physical effects immediately
kick off the cleaning impact of the dry ice.

The kinetic effect: the momentum of impact

The kinetic energy being released by the impact of
the dry ice particles on the work piece deforms and
chops the particles. Like that they can enter deeply
into the cracks that have formed due to the cooling.

 

The thermal effect: the selective cooling
The contact of the dry ice pellets with the surface of
the workpiece results in a sudden refrigeration of the
coating or contamination that is to be removed. That
results in the occurrence of tension because of the
different thermal expansion coefficient between
contamination layer and work piece. The layer of
contamination develops micro cracks and so
contributes to the effectivity of the next two effects.

The phase transformation effect: the blasting
power of sublimating dry ice

After deeply permeating the contamination layer, the
dry ice immediately heats up and gasifies. During this
process of the sublimation of dry ice its volume
increases by more than 700 times. The
contamination layer bursts through the force of this
expansion. The surface itself however remains
unharmed

Examples Dry Ice Cleaning Applications in the Oil and Gas Industry:

• Electric motors, electric generators, electric control panels, cables, bus bars, & modules.
• Vessel internals & tube sheets
• Preparation of welds on process vessels prior to non-destructive testing
• Gas and steam turbine rotors, blades, diaphragms, casing, nozzles & other modules
• Boilers, deaerators & other process water related equipment
• External surface of finned and non-finned tubes in furnaces, boilers and HRSG systems
• Tanks Plants & Power Plant Cleaning
• Sulfur removal
• Heat exchangers
• Engines and engine parts
• Valves, piping and other related equipment
• Pipelines
• Production equipment
• Electric production equipment
• Electric motors
• Convection section or re-boilers
• Rotating equipment
• Heat exchangers / radiators / fin-fan coolers
• Electric control cabinets
• Shell side tube bundles
• Circuit breakers and boards
• Reactor screens
• Housings, stators, wiring, windings

The top ten reasons why dry ice blasting with ATS is so superior.

1. Outstanding cleanliness.
2. Equipment can be cleaned with dry ice directly at your site, meaning no complex disassembly and
increasing the productivity of your business.
3. Time is Money!
4. Gentle on surfaces / non-abrasive / non-flammable and not electrically conductive.
5. Prevention of secondary waste.
6. Dry ice blasting is everywhere.
7. Environmentally friendly and easy on resources.
8. User and occupational safety.
9. User efficiency.
10. Yes, in the food industry!