Workshop on Electrostatic Atomization of Electrically Insulating Liquids : Principles and...
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Transcript of Workshop on Electrostatic Atomization of Electrically Insulating Liquids : Principles and...
Workshop onElectrostatic Atomization of Electrically
Insulating Liquids : Principles and Applications
Applications of Electrostatic Atomization in Industry
Presented by
Rudolf J. Schick and Michel Thenin,
Spraying Systems Co.
Who is Spraying Systems Co.?
• World Leader in Spray Technology— Headquarters in Wheaton, IL— 10 manufacturing facilities in the Americas, Europe, Asia— 85 local sales engineering offices around the world
• In attendance— Michel Thenin – General Manager and Life Science Global Director— Rudolf J. Schick – Vice President
Spray Performance Factors
Spray Pattern Types
Performance Considerations
• Specific Gravity• Viscosity• Surface Tension• Temperature• Abrasion/Corrosion
• Solid Stream• Flat Spray• Hollow Cone • Full Cone • Fine Spray
— Hydraulic Atomization— Two-fluid Atomization (Air)
• Nozzle Flow Rate/Pressure• Spray Angle/Coverage• Drop Size• ImpactLiquid & Environmental Considerations
Automation & Control Requirements • Intermittent Timing Control• Flow Control• Batch Control• Installation restrictions• Nozzle positioning • Headers & lances
Adaptability
Optimizing spray performance
Spray System
Optimization
Spray Coating• Most Popular Spray Application
• Covers many industries
— Paper
— Steel
— Food
— Pharma
• Generally involves depositing a chemical on a moving target
APPLICATION OF INTEREST
Keys For Success
Optimization of spray distribution/patternation
A B C
D1 D2 D3
SPRAY ANALYSIS
Keys For Success
Optimization of drop size distribution
SPRAY ANALYSIS
Current Practice• General Industrial Applications
— Traditional Flat Fan Nozzles
— Hydraulic Atomization
— Low Cost
— Overlap (Ideal – optimized)
— Drop size (adequate)
— Transfer Efficiency (optimized)
— Adaptability (rigid)
• Higher Precision Industrial Applications
— Two Fluid Nozzles
— Pneumatic Atomization
— High Cost
— Overlap (adequate)
— Drop Size (Ideal – optimized)
— Transfer Efficiency (adequate)
— Adaptability (flexible)
Flat Spray (Tapered)
General Spray Characteristics• Hydraulic Atomization • Usually installed on a header
—Provides uniform coverage - entire target—Overlapping distributions
• Wide range of low rates (.1 – 10 l/min)• Wide range of spray angles (15º – 110º)
Typical Applications
– Spray Coating– Product Washing– Sheeting or Plate Cooling– Moistening
SPRAY PATTERN
Flat Spray Nozzles
Deflector
High Impact
Standard
Hydraulic app to come
Two-Fluid Nozzles
General Spray Characteristics• Pneumatic Atomization (Internal/External Mix)
—Some feature mechanical assist• Usually installed on a header
—Provides uniform drop size distribution• Wide range of flow rate (.1 – 5 lit/min)
Typical Applications• Humidification• Evaporative Cooling• Coating• Moistening• Greenhouse Applications
SPRAY PATTERN
Two-Fluid Nozzles Internal Mix
SPRAY PATTERN
LIQUID
GAS
Air Caps
Round Flat
Air Cap Fluid Cap
AIR
LIQUID
AIR
LIQUID
Two-Fluid NozzlesExternal Mix
SPRAY PATTERN
LIQUID
GAS
Air Caps
Flat Round
AIR
LIQUID
AIR
LIQUID
Current Practice – what we like• General Industrial Applications
— Traditional Flat Fan Nozzles
— Hydraulic Atomization
— Low Cost
— Overlap (Ideal – optimized)
— Drop size (adequate)
— Transfer Efficiency (optimized)
— Adaptability (rigid)
• Higher Precision Industrial Applications
— Two Fluid Nozzles
— Pneumatic Atomization
— High Cost
— Overlap (adequate)
— Drop Size (Ideal – optimized)
— Transfer Efficiency (adequate)
— Adaptability (flexible)
Technology Premise• General Industrial and Higher Precision
applications
— Flat Fan Nozzles
— Efficient Atomization
— Low Cost
— Overlap (Ideal – optimized)
— Drop size (Ideal – optimized)
— Transfer Efficiency (optimized)
— Adaptability (Flexible)
Targeted Spray Deposition
Minimal Waste
Pan Lube System
APPLICATIONS
Chain Lube System
APPLICATIONS
Conclusion
TO COME
• TO COME