In this webinar, Alex Heino discusses the function of the deaerator and the different types of deaerators with their characteristics. He explains the effect switching from tray type to spray type has on performance, sustainability and potential cost savings. He also provides guidance on your business case for converting from a tray to a spray type deaerator.

1. WEBINAR: IMPROVING
DEAERATOR PERFORMANCE
The webinar starts at 10.00h CET
You can ask questions through the Q&A button in the Zoom menu
During the webinar all participants are on ‘mute’.

2. Energy transition
Circular economy
Decarbonize
existing assets
STORK PROVIDES OPERATIONS & MAINTENANCE SERVICES
ACROSS MULTIPLE INDUSTRIES

3. Alex Heino
Product specialist Deaerators
SUBJECT MATTER
EXPERT SPEAKER
December 7, 2022 Page 3

4. IMPROVE
DEAERATOR PERFORMANCE
STEAM SYSTEM
- Steam system & why do we need a
Deaerator in a steam system
- Types of Deaerators
- Construction of Deaerators
- Tray type / Spray type Deaerator
- Cost of Ownership
- Retrofit to Spray type Deaerator
December 7, 2022 Page 4

5. Page 5
December 7, 2022 Page 5
IMPROVE DEAERATOR PERFORMANCE
“THE LEAST KNOWN COMPONENT IN A STEAM SYSTEM”
STEAM SYSTEM
- Schematic illustration of a
water/Steam system.
- 8: Deaerator
- 1,2,3,9,11: Boiler
- 4,5,6: Turbine Generator set
- 7,10: Condenser and pumps

6. REMOVES GASES that are dissolved in the condensate like:
- Oxygen => Corrosion (oxidation of metals)
- CO2 => Corrosion (dissolving of metals)
- N2, Others
STORAGE OF FEED WATER
- Capacity of the deaerator is about 10-20% of nominal steam production
Example: 100 t/hr deaerator => ~10-20 ton capacity
PRE-HEATING OF THE FEEDWATER TO THE BOILER. (10~20 °C)
Example: condensate 90°C => feedwater ~105°C
ENERGY BUFFER
December 7, 2022 Page 6
IMPROVE DEAERATOR PERFORMANCE
WHY DO WE NEED A DEAERATOR?

7. December 7, 2022 Page 7
IMPROVE DEAERATOR PERFORMANCE
BASIC COMPARISON SPRAY TYPE/TRAY TYPE
Deaerators types
Spray type
• Condensate distribution: “sprayer device”
• Steam distribution: steam rake
• Air vent(s) near the sprayer
Tray type
• Condensate distribution Tray’s
• Steam distribution close to the trays.
• Air vent on the dome

8. Water steam interaction based on
distillation column technology
• Tray technology
• Packed column technology
• Other
Tray type works best in its
nominal design condition.
Steam flow and water flow must
be in “balance”
December 7, 2022 Page 8
DEAERATOR
TRAY TYPE

9. Water steam interaction based on
spraying water in steam environment
• Water distribution by flow regulated
sprayer into small droplets
• Steam distribution by “steam rake”
• Steam flow and water flow relatively
independent, high load range.
• Very high deaerating performance and
hence:
• Very low vent flow
December 7, 2022 Page 9
IMPROVE DEAERATOR PERFORMANCE
SPRAY TYPE

10. Retro fit from Tray type to Spray type Deaerator because:
• Higher and constant deaeration performance: ~7 ppb
• No chemicals (Oxygen scavengers) needed
• Efficiency improvement (90% reduction of vent losses)
• Improved capacity
• Turndown ratio >1:10
• Construction simplified, reduced piping etc
• Low Maintenance => no spare parts, low down time
December 7, 2022 Page 10
IMPROVE DEAERATOR PERFORMANCE
RETROFIT SPRAY TYPE DEAERATOR

11. Improved cost of ownership based on a 500 t/h deaerator (estimates):
• No oxygen scavenging chemicals needed -€ 100.000,- /year
• Reduced steam venting (-90%) -€ 75.000,- /year
• Better performance/less corrosion
Investment on a typical project
• Typical basic Spray type retrofit (500 t/hr) € 200.000,-
(within EU, Vessel conversion only) (€ 100k to 500k)
https://www.stork.com/en/capabilities/equipment/deaerators/deaerator-retrofit
December 7, 2022 Page 11
IMPROVE DEAERATOR PERFORMANCE
COST OF OWNERSHIP REDUCTION ESTIMATE

12. CONVERTING TO SPRAY TYPE
Scope:
• Engineering
• Disconnecting present steam and water
connections to the dome
• Install / replace the steam rake.
(when necessary)
• Install Stork Sprayer
• Re-connect the steam and water
connections when necessary.
• Commissioning
December 7, 2022 Page 12
IMPROVE DEAERATOR PERFORMANCE
RETROFIT SPRAY TYPE DEAERATOR

13. December 7, 2022 Page 13
IMPROVE DEAERATOR PERFORMANCE
RETROFIT SPRAY TYPE DEAERATOR, EXAMPLE
=>

14. • Improve deaerator performance by converting to spray type deaerator
• Conversion will reduce cost significantly due to:
― Removing of oxygen scavenging
― Reduction of vent losses
• ROI often within 3 years
• Conversion relatively straight forward.
• Thank you for your attention !
December 7, 2022 Page 14
IMPROVE DEAERATOR PERFORMANCE
WRAP UP!

15. > QUESTIONS

16. RECORDED WEBINARS
> www.stork.com/recorded-webinars
CONTACT US
> experts@stork.com
NEXT EVENTS
THANK YOU FOR ATTENDING
Fugitive
emissions
14 DEC.
3 x Smart
maintenance
Q1 2023
TIAM 2023
LIVE
(NL)
25 JAN