A complete overview of what dry ice is and how it is used for cleaning. Covers off what types of soils it can remove and what types of surfaces it can clean.

1. DRY ICEBLASTING:
HOW DOES IT WORK?
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2. 0800 PRESCO | PRESCO.CO.NZ
DryIce Blasting isa ground-breaking,
non-toxic,non-abrasivecleaning
methodthatproduceszero secondary
waste(e.g.sand/glass,dirtywater,dirty
clothsandchemicalcontainers).
WHAT IS DRYICE BLASTING?

3. WHAT IS DRYICE?
• Afrozensolidform ofrecycledcarbondioxide
gas (a naturalpartoftheatmosphere.)
• VERYcold.Atatmosphericpressuredryiceis-
78˚C.
• Odourfree
• Non-toxic
• Non-combustible
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4. • Dry ice doesnot melt,it goesthrougha process called
‘sublimation’anddisappears intothe atmosphere.
• Sublimationis the transformationfromsolid togas without
going througha liquid stage.
• So dryice does NOT produce liquid,whereasregularice
turnstowaterswhenit melts.
WHAT IS THE DIFFERENCE BETWEENDRY ICE AND
NORMAL ICE?
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5. Dryicepelletsare propelledbya jetofcompressed
air andstrikethesoiltoberemovedat velocitiesup
tothespeedofsound.
Cleaningresultsfrom threeeffects:
1. ThermalShock
2. KineticEnergy
3. Sublimation
HOW DOES DRYICE BLASTING WORK?
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6. 1. ThermalEffect:
The low temperature (-79˚C) makes the
soil brittle, cracks it and loosens its
adhesion to the substrate.
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7. 2. Kinetic Effect:
Dry ice pellets are propelled by
compressed air at approx. the speed of
sound creating kineticenergy that
fractures and penetrates the brittle soil
without damaging the substrate.
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8. 3. Sublimation:
On impact, the dry ice turns from solid into gas
(sublimes), expanding its volume by a factor of
700. This rapid expansion acts likean
explosion that lifts the brittle coating off the
surface.
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9. WHAT TYPES OFSOILWILLDRY ICE BLASTING
REMOVE?
• MOULD
• ALGAE
• DIRT/DUST
• SOOTANDCARBON
• MILK PRODUCTS
• FATS ANDGREASE
• FRUIT AND VEGETABLES
• SUGARS ANDSYRUPS
• FLOUR ANDGRAINS
• PATHOGENSANDBACTERIA
• ADHESIVES ANDRESINS
• MANUFACTURING RESIDUE
• HYDROCARBONS
• INK
• CHEWING GUM
• CEMENT ANDPLASTER
• RUST SCALE/STAIN
• PAINT-GRAFFITI
• TAR ANDBITUMEN
• EXPANDEDFOAM
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10. • STAINLESS STEEL
• CARBONSTEEL
• ALUMINIUM
• PAINTEDSURFACES
• POWDERCOATEDSURFACES
• GLASS
• RUBBER
• PLASTIC
• WOOD
• CONCRETE
• BRICKSAND TILES
• FIBREGLASS
WHAT TYPES OF SUBSTRATESCAN DRY ICE
BLASTINGCLEANWITHOUTDAMAGING?
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11. • FOOD PROCESSINGPLANT
• CONVEYORSANDCHAINS
• HEATEXCHANGERS
• CABLERACKS
• GRILLES
• OVENS
• DUCTS
• SILOSANDTANKS
• PRINTERS
• TURBINEROTORS
• BOILERS
• VALVES
• SENSITIVEEQUIPMENT
• SWITCHBOARDS
• TRANSFORMERS
• BUILDINGCLADDING
WHAT TYPES OFEQUIPMENT CAN DRYICE
BLASTINGCLEAN?
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12. DOES DRYICEBLASTING ACTUALLY
SANITISE THE SURFACEDBEING CLEANED?
Yes. Becauseofitsultra lowtemperature (-79˚C),dryicecleaninghasa sanitising
effectonthesurfacesbeingcleaned.Allergencontaminationisremoved,surfaces
are sterilisedandmouldandbacteriagrowthisinhibited.
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13. IS DRYICE BLASTINGSAFE FORTHE
ENVIRONMENT?
Dryiceblastingisrecognizedas anenvironmentallyresponsiblecleaningprocess
becauseitdoesn’tproduceanyhazardous,secondarywaste. Dryiceisharvested
fromCarbonDioxide(CO2) thatwouldnormallyhave beenreleasedintothe
atmosphere.ItgivesCO2emissionsa “secondlife”inperforminga cleaningtask
beforebeingfinallyreleased. Dryiceblastinghasnoadditionalozonedepleting
potential.
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14. WHY USEDRYICE INSTEAD OF
TRADITIONALBLASTMATERIALS?
Mostotherblastmedialeave secondarywastebehind.Dryicesublimates
(vaporizes)uponimpactwiththesurface.Allthatremainsisthesoilthatyouare
removing,whichfallstotheground.Also,sincedryicevaporizesonimpact,the
processcanbeusedtocleancomplicatedcavitieswheretypicalgritblastmedia will
becometrapped.
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15. WILLDRY ICE BLASTINGDAMAGE THE
SUBSTRATE?
No.Thesizeofthedryicepelletsandtheir velocitycanbeoptimizedtoremovethe
contaminantwhileremainingnon-abrasivetothesubstrate.Theprocesscanclean
delicatechromeor nickelplatedtools,softaluminiumor brassalloys,wire
insulationandevencircuitboards–allwithoutcausingdamage.
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16. OPERATIONAL BENEFITS OF DRYICE
BLASTING
• NO chemicals
• NO water
• NOabrasives
• NO fumes/odour
• NO secondary waste to remove
• NO drying out time
• NO residues
• Faster maintenance turnaround
• More thorough clean
• Sanitise while you clean
• Can clean plant while hot
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17. FINANCIAL BENEFITS OF DRYICE BLASTING
• Veryfastcleaning. Upto10timesfasterthanmanualcleaning
• Shortermaintenancedowntime=more productiveuptime
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18. FURTHERQUESTIONS ON DRY ICE
BLASTING?
ContactthePrescoEnvironmentalteam:
sales@presco.co.nz
+6462780712
Free PhoneinNZ:0800PRESCO(0800773726)
www.prescoenvironmental.co.nz
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