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1、 Principle and core advantages of dry ice cleaning technology

Dry Ice Blasting is a technology that uses solid carbon dioxide particles (-78.5 ℃) to impact the surface of an object under compressed air, and achieves cleaning through the triple mechanism of "thermal shock effect", "micro explosion effect", and "sublimation effect". Compared to traditional cleaning methods, its prominent advantages include:

Non destructive cleaning: Will not wear down precision components such as tracks and pantographs

Zero second pollution: After sublimation of dry ice, only stripped dirt remains

Online homework ability: No need to disassemble equipment.

Efficient and energy-saving: a single operation can save more than 60% of working hours

2、 Typical application scenarios

(1) Deep maintenance of track system

Removal of oxide layer on rail welding joints (cleaning efficiency up to 4m/min)

Oil sludge treatment of switch sliding bed board (300% higher efficiency than chemical cleaning)

Live cleaning of contact wire insulators (voltage withstand level restored to over 95%)

(2) Vehicle maintenance revolution

Carbon removal of bogie (saving 18 tons/train compared to steam cleaning)

Bottom brake disc oil pollution treatment (reduced operation time to 1/5 of traditional methods)

Air conditioning unit fin dust removal (air resistance reduced by 40%)

3、 Advantages of dry ice cleaning

Environmental friendliness

Zero chemical residue: completely avoiding chemical agents such as strong acids and alkalis used in traditional cleaning, eliminating the risk of secondary pollution (such as corrosion of track circuits and endangering the health of maintenance personnel)

Water and energy conservation: Single row subway cleaning can save 15-20 tons of water and reduce sewage treatment costs; Energy consumption is only one-third of that of high-pressure water jets

Carbon reduction: Taking the Beijing subway as an example, the comprehensive application of dry ice cleaning can reduce CO ? emissions by about 1200 tons per year (equivalent to planting 65000 trees)

Equipment protection characteristics

Non contact cleaning: By high-speed impact, dirt is peeled off, avoiding mechanical damage to precision components such as signal sensors and pantograph slides caused by traditional brushing

Low temperature safety: Dry ice particles vaporize instantly at -78.5 ℃, without causing thermal deformation of metal parts, especially suitable for processing aluminum alloy vehicle body welds and composite material components

Electrical safety: The insulation characteristics make it safe to use for cleaning live equipment (such as contact wire insulators and transformer cabinets), avoiding power outage losses

Improve operation and maintenance efficiency

Online homework ability: No need to disassemble large equipment such as bogies and air conditioning units, and the cleaning time for a single carriage has been reduced from traditional 4.5 hours to 1-1.5 hours