Presentation%20deaearator

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Spray-type Deaerator
Presentation
Stork Thermeq BV
Start
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Presentation Stork Spray-type Deaerator
3
Application
Construction
General
Conclusion
Deaerating process steps (1)
Principle
Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
4
Application
Construction
General
Conclusion
Deaerating process steps (2)
Principle
Performance
Venting

• sprayer
• steam
• vessel

Comparison
- Lay-out
- Operation
Retrofit
5
Application
Construction
General
Conclusion
Principle
Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
6
Application
Construction
General
Conclusion
Principle
Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
7
Application
Construction
General
Conclusion
Comparison layout
Principle
Typical layout Cascade or Spray/tray-type
Deaerators
Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
8
Application
Construction
General
Conclusion
Comparison layout
Principle

• Stork Spray-type
• No vent condenser
• One vessel
• 1 top platform
• min. insulation
• min. piping
• easy erection
• low total height
• earthquake optimal

• Cascade Spray/tray-type
• Vent condenser or high losses
• Storage vessel top tank
• more platforms
• extended insulation
• balance lines, more length
• erection both tanks and piping
• extra total height top tank
• forces top tank to storage
  vessel critical for earthquake-design

Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
9
Application
Construction
General
Conclusion
Comparison layout
Principle
Stork Spray-type
Cascade Spray/tray-type
Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
10
Application
Construction
General
Conclusion
Comparison operation
Principle

• Stork Spray-type
• heating-up with
  standard steamrake
• operating range gt 130
• no pressure difference in
  steam area

• Cascade Spray/tray-type
• additional heating storage
  tank required
• operating range max. 14
• pressure difference storage vessel and top
  tank at high loads

Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
11
Application
Construction
General
Conclusion
Comparison operation
Principle

• Stork Spray-type
• water saturated with rising pressure easy
  control
• simple pressure control
• rate pressure decrease limited by NPSH
  feedwater pump

• Cascade Spray/tray-type
• water subcooled with rising pressure
  sensitive control
• pressure control feedforward
• rate pressure decrease is a critical item in
  design top tank

Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
12
Application
Construction
General
Conclusion
Retrofit spray-tray to Stork design
Principle
Performance
Venting
Comparison
- Lay-out
- Operation
Retrofit
13
Application
Construction
General
Conclusion
Media
Media
Flow to be deaerated Heat supply to deaerator
condensate / feedwater make-up / demin.
water superheated steam saturated steam wet steam
(.. 90 ) steam/water mixture (.. 1 steam) hot
water (flashing in internals)
Ranges
Conventional
HRSG
Vacuum
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Application
Construction
General
Conclusion
Ranges
Media
Pressure 0.2 1.0 bara Vacuum to 1.3 bara
1.2 20 bara Overpressure
Capacity 2 120 T/H Type DN150 spring
7 450 T/H Type DN250 spring
60 660 T/H Type 600 disc
120 1320 T/H Type 1200 disc
600 6000 T/H 5x type 1200 disc
Diameter 1.6 5.0 m Normal range
Length Limits of workshop Site assembly possible
Ranges
Conventional
HRSG
Vacuum
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Application
Construction
General
Conclusion
Stork
Media
From CR Bypass operation
Ranges
Conventional
HRSG
Vacuum
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Application
Construction
General
Conclusion
Deaerator LP-drum
Media
Ranges
Conventional
HRSG
Vacuum
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Application
Construction
General
Conclusion
Deaeration by ECO-water
Media
Ranges
Conventional
HRSG
Vacuum
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Application
Construction
General
Conclusion
Vacuum operation with gas
Media
Vacuum venting
Ranges
Conventional
HRSG
Vacuum
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Application
Construction
General
Conclusion
Overpressure with oil
Media
Ranges
Conventional
HRSG
Vacuum
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Application
Construction
General
Conclusion
Material selection
Material

• Vessel
• Steam charging device
• Flow baffles
• Spray baffle
• Sprayer

Carbon steel Carbon steel (principal) Stainless
steel (erosion, high water content) Carbon
steel Carbon steel Stainless steel
PWHT
Sprayers
Internals
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Application
Construction
General
Conclusion
Post Weld Heat Treatment
Materials
Quality Saving on maintenance costs Code
requirement Dependent on wallthickness Optimal
measure against cracking based on worldwide
experience NACE, VGB, S42
Client requirement Obligation Stork
advice Relevant standards
PWHT
Sprayers
Internals
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Application
Construction
General
Conclusion
Disc type
Spring type
Materials
PWHT
Sprayers
Internals
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Application
Construction
General
Conclusion
Disc type
Spring type (new)
Materials
PWHT
Sprayers
Internals
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Application
Construction
General
Conclusion
Stork deaerator
Materials
PWHT
Standard design Y-type steamrake Alternative
combination A / H type
Sprayers
Vortex beaker
Spray baffle
Internals
Small baffle
Large baffle
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Investing in deaerators you want
Attractive prices Flexible design, minimum
height Minimize the maintenance
budget Satisfaction on your decision for years
and years
Stork spray-type Deaerators
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End of Presentation
Stork Thermeq BV
End