Babcock-Hitachi Europe GmbH Babcock-Hitachi Europe GmbH Manufacturers’ know how on advanced capture technologies Manufacturers’ know how on advanced capture technologies - Higher efficiency towards zero emission - 02.12.2005 Dr. Andreas Reidick Klaus-Dieter Rennert [email protected][email protected]
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Babcock-Hitachi Europe GmbHBabcock-Hitachi Europe GmbH
Manufacturers’ know how onadvanced capture technologiesManufacturers’ know how onadvanced capture technologies
• Steam parameters:SH: 600 °C / 272 barRH: 605 °C / 55.3 bar
• Commissioning: 2010/2011
Babcock-Hitachi Europe GmbH
HARAMACHI POWER STATION UNIT No. 2
Unit Capacity 1,000 MWel
Evaporation 2,890 t/h
Steam Pressure 25.9 Mpa
Steam Temperature 604 / 602 °C
Fuel Bituminous Coal
Commissioning 1998
Utility:
TOHOKU ELECTRIC POWER CO.
Japan
Babcock-Hitachi Europe GmbH
flue gas
s = f (allowable stress)
corrosion layer
Superheater/ Reheater Tubes
steam
tube wall
Inner Oxide layer
OuterOxide layer
steam oxydation
corrosion
Babcock-Hitachi Europe GmbH
Magnetite Scale in an Elbow
Spalling of outer oxide layer
Babcock-Hitachi Europe GmbH
Tube Internal Surface Shot Blasting Procedure
Tube
Shot Particle
Compressed Air including shot particle
material
Circumferential Blasted Nozzle
Shot Blasting Conditions (BHK Facility)
Shot Particle Material : SUS304 particle Φ 0.5 x 0.5L
Max. Blasting Pressure : 7 bar
Nozzle Movement Velocity : 100~800mm/min
Air Flow : max. 9m3/min
Babcock-Hitachi Europe GmbH
The effect of the shot blastingThe effect of the shot blasting
MetalMetal
Schematic
Grain boundary
Shot blasted50µm
・Step1: The crystal grains are collapsed ・Step2: Cr2O3 is formed with the result that the oxidizing velocity is very slow ・Step3: The scale growth is suppressed.
(Fe,Cr)3O4
Cr2O3
Fe3O4
Effect of Shot Blasting after 34412 Operating h Super 304 H, 586 °C Steam
Outer Scale
Inner Scale
Original MaterialMetal
50µm
Thin Cr2O3layer
Outer Scale
Inner Scale
Metal
(Fe,Cr)3O4
Fe3O4 O2-
Fe2+
Grain boundary
Schematic
and the supply of Cr to the scale is promoted.
Diffusion of Cr
The layer where the crystal grains were collapsed.Cold worked
layer
Babcock-Hitachi Europe GmbH
National and European Research Programs
Babcock-Hitachi EuropeSuperheaterTubing Sheets
Influence of Coldforming on CreepBehaviour of Austenitic Steels and Nickel Base Alloys
3.2003 – 2.2006VGB-
FDBR-AiFProgram
V & MHeader, PipingCriteria for Demage Evaluation in High Temperature Components of martensitic9-11 % Cr-Steels
1.2005 – 12.2007A 229
SZMFHeader, PipingOptimization of Welding Joints and Prevention of HAZ – Creep by Means of Strength Properties
7.2004 – 6. 2007A 221
V & MHeader, PipingEvaluation of Scatterband of HeatresistingMaterials Concerning Creep Behaviour withData-Mining-Methode
1.2005 – 6.2006A 198
Babcock-Hitachi EuropeHeader, PipingLongitutinal Welded PipesCompletely new heattreated P 91 and E 911