Rajamane & Hegde Services Pvt.Ltd
CRYOGENIC CLEANING FOR ELECTRICAL ROTATING MACHINES
Cryogenic Cleaning Method
Traditional Cleaning Methods
Cryogenic Cleaning:
  • Cryogenic cleaning is a process in which particles of solid carbon dioxide are propelled at a high velocity to impact and clean a surface
  • Traditional cleaning methods like bead blasting and sand blasting clean through a chiselling action, much like using an ice pick often damaging the substrate.
  • Cryogenic cleaning on the other hand might be compared to a spatula as it lifts the contaminant away.
How it works ….
  • Step # 1 - Energy Transfer : Dry ice is propelled outside the blasting at high speeds to impact the surface. The force of this impact is the primary means of cleaning.
  • Step # 2 - Micro Thermal Shock : The cold temperature of the dry ice hitting the contaminant creates a micro thermal shock at -79 degrees centigrade thereby breaking the bond between the surface contaminant and the substrate.
  • Step # 3 - Gas Pressure : Sublimation of the dry ice on impact forces off the contaminant from behind because of expansion form the solid to gaseous state.
Illustration of the cleaning:
  • The dry ice penetrates below the pollutant and instantly expands because of conversion from the solid to the gaseous state.
  • This sublimation creates a wave of compression tension between the contaminant and the substrate.
  • The carbon dioxide evaporates relocating the pollutant, which typically falls to the ground.
The advantages:
  • Post dry out not required
  • Not abrasive in nature does not damage the substrate
  • Ideal for in position cleaning – reduced down time
  • Environmentally Friendly
  • Provides a cleaner Clean
  • Insulation values improve immediately on cleaning
  • Non-flammable and nonconductive
Solvent Cleaning
  • Affects the insulation
  • Not environmentally friendly
  • Post dry out required
Steam Cleaning
  • Abrasive in nature
  • Moisture Ingress
  • Post Dry out in an oven mandatory
 
 
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