Presentation Start Spraytype Deaerator Stork Thermeq BV Stork

® Presentation Start Spray-type Deaerator Stork Thermeq BV Stork Thermeq B. V.

® Presentation Stork Spray-type Deaerator Stork Thermeq B. V.

® General Construction Conclusion Deaerating process steps (1) Principle Performance Application Step Item 1 Spray-device Function 8 100% heating up 8 Partial deaeration Venting 2 Steam Charging Device (SCD) Comparison - Lay-out - Operation Retrofit 3 Vessel 8 Cooling steam to saturation temperature 8 Steam distribution 8 Feedwater storage (no heating up) 8 Relief of non-condensable gases 8 Finalization of deaeration Stork Thermeq B. V.

® General Application Construction Conclusion Deaerating process steps (2) Principle Performance Venting • sprayer • steam Comparison • vessel - Lay-out - Operation Retrofit Stork Thermeq B. V.

® General Application Construction Conclusion Principle Performance Venting Comparison - Lay-out - Operation Retrofit Stork Thermeq B. V.

® General Application Construction Conclusion Principle Performance Venting Comparison - Lay-out - Operation Retrofit Stork Thermeq B. V.

® General Application Construction Conclusion Comparison; layout Principle Typical layout Performance Cascade or Spray/tray-type Deaerators Venting Comparison - Lay-out - Operation Retrofit Stork Thermeq B. V.

® General Application Construction Conclusion Comparison; layout Principle Stork Spray-type Cascade Spray/tray-type No vent condenser Vent condenser or high losses One vessel: Storage vessel + top tank: • 1 top platform • more platforms • min. insulation • extended insulation • min. piping • balance lines, more length - Lay-out • easy erection • erection both tanks and piping - Operation • low total height • extra total height top tank • earthquake optimal • forces top tank to storage vessel critical for earthquake-design Performance Venting Comparison Retrofit Stork Thermeq B. V.

® General Principle Application Construction Conclusion Comparison; layout Stork Spray-type Cascade Spray/tray-type Performance Venting Comparison - Lay-out - Operation Retrofit Stork Thermeq B. V.

® General Principle Performance Application Comparison - Lay-out Conclusion Comparison; operation Stork Spray-type Cascade Spray/tray-type • heating-up with • additional heating standard steamrake Venting Construction storage tank required • operating range > 1: 30 • operating range max. 1: 4 • no pressure difference in steam area • pressure difference storage vessel and top tank at high loads - Operation Retrofit Stork Thermeq B. V.

® General Principle Performance Venting Comparison - Lay-out - Operation Application Construction Conclusion Comparison; operation Stork Spray-type Cascade Spray/tray-type • water saturated with rising pressure; easy control • water subcooled with rising pressure; sensitive control • simple pressure control • pressure control + feedforward • rate pressure decrease limited by NPSH feedwater pump • rate pressure decrease is a critical item in design top tank Retrofit Stork Thermeq B. V.

® General Principle Application Construction Conclusion Retrofit spray-tray to Stork design Cascade-type Deaerator before retrofit Performance Stork Spray-type Deaerator after retrofit Venting Comparison - Lay-out - Operation Retrofit Stork Thermeq B. V.

® General Application Flow to be deaerated Conventional Conclusion Media Ranges Construction condensate / feedwater make-up / demin. water Heat supply to deaerator superheated steam saturated steam wet steam (. . 90 %) HRSG steam/water mixture (. . 1% steam) hot water (flashing in internals) Vacuum Stork Thermeq B. V.

® General Construction Conclusion Ranges Media 0. 2 – 1. 0 bara Vacuum to 1. 3 bara 1. 2 – 20 bara Overpressure 2 – 120 T/H Type DN 150; spring 7 – 450 T/H Type DN 250; spring 60 – 660 T/H Type 600; disc 120 – 1320 T/H Type 1200; disc 600 – 6000 T/H 5 x type 1200; disc Diameter 1. 6 – 5. 0 m Normal range Length Limits of workshop Site assembly possible Pressure Ranges Capacity Conventional HRSG Vacuum Application Stork Thermeq B. V.

® General Application Conventional Conclusion Stork Media Ranges Construction From CR Bypass operation Condensate HRSG Vacuum To HP- heaters Stork Thermeq B. V.

® General Application Construction Deaerator LP-drum Media Condensate / LP- Steam make-up water Ranges Conventional Conclusion HRSG Evaporator HRSG Heat source: Water / steam mixture Vacuum Economizer To drum Natural / forced circulation Stork Thermeq B. V.

® General Application Construction Conclusion Deaeration by ECO-water Media LP- Steam = 0 Ranges Conventional HRSG Condensate / make-up water Vacuum Heat source: Hot Eco-water Economizer To drum Stork Thermeq B. V.

® General Application Construction Conclusion Vacuum operation with gas Media Vacuum venting LP- Steam = 0 Ranges HRSG Conventional Gas fired 60 °C Condensate / make-up water HRSG Vacuum Economizer To drum Heat source: Steam / Hot Eco-water Stork Thermeq B. V.

® General Application Construction Conclusion Overpressure with oil Media LP- Steam supply Ranges HRSG Conventional Oil fired 135 °C Condensate / make-up water HRSG Vacuum Economizer To drum Heat source: Steam / Hot Eco-water Stork Thermeq B. V.

® General Application Construction Conclusion Material selection Material • Vessel Carbon steel • Steam charging device Carbon steel (principal) PWHT Sprayers Stainless steel (erosion, high water content) Internals • Flow baffles Carbon steel • Spray baffle Carbon steel • Sprayer Stainless steel Stork Thermeq B. V.

® General Application Conclusion Post Weld Heat Treatment Materials Client requirement Quality Saving on maintenance costs PWHT Sprayers Construction Obligation Code requirement Dependent on wallthickness Stork advice Optimal measure against cracking based on worldwide experience Internals Relevant standards NACE, VGB, S 42 Stork Thermeq B. V.

® General Application Disc type Construction Conclusion Spring type Materials PWHT Sprayers Internals Stork Thermeq B. V.

® General Materials Application Disc type Construction Conclusion Spring type (new) PWHT Sprayers Internals Stork Thermeq B. V.

® General Application Conclusion Stork deaerator Materials PWHT Construction Standard design: Y-type steamrake Sprayers Internals Alternative & combination A / H type Vortex beaker Spray baffle Large baffle Small baffle Stork Thermeq B. V.

® 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 Stork Thermeq B. V.

® End of Presentation End Stork Thermeq BV Stork Thermeq B. V.