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MITSUBISHI HEAVY INDUSTRIES, LTD.MITSUBISHI HEAVY INDUSTRIES, LTD.
The Latest Supercritical CoalThe Latest Supercritical Coal--Fired BoilerFired Boilerandand
CustomerCustomer’’s Requirements s Requirements for Utility Power Boilersfor Utility Power Boilers
1.1. High Performance High Performance (High Efficiency and Low Emission)(High Efficiency and Low Emission)
2.2. Operability Operability (WSS, DSS and 2 shift operation)(WSS, DSS and 2 shift operation)
3.3. Less and Easy MaintenanceLess and Easy Maintenance
4.4. Wide Fuel Range (Wide Coal Range)Wide Fuel Range (Wide Coal Range)
Trend of Steam ConditionTrend of Steam ConditionTe
mpe
ratu
re (℃
)
200
300
500
400
600
0
20.0
30.0
TemperaturePressure
Pres
sure
(MPa
(g))
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
538℃ 566℃
600℃
593℃
16.5MPa(g)
24.1MPa(g)
24.5MPa(g)31.0MPa(g)
10.0
History of Steam Pressure and Operation in History of Steam Pressure and Operation in Japanese Utility Power PlantJapanese Utility Power Plant
0
20
40
60
80
100
120
140
1960
1965
1970
1975
1980
1985
1990
1995
2000
C om m erc ia l O peration Year
Uni
t Out
put (
GW
)
V ariab le P ressure O peration Supercritica lC onstant P ressure O peration Supercritica lSubcritica l
Sliding Pressure Supercritical Unit is mainstream.
2.2. Boiler Design FeaturesBoiler Design Features
Furnace Water Wall ConfigurationFurnace Water Wall Configuration&&
Operation ResultsOperation Results
What is required to the Latest boiler design? What is required to the Latest boiler design?
(4)Middle Load Operation
(5)Partial Load Efficiency(2)Easy maintenance
(3)Easy Construction
Supercritical Pressure with high steam temperature
(1) Higher Plant Efficiency
Sliding Pressure OperationSimple Structure
Less Welding point
TARGET
Furnace Waterwall DesignFurnace Waterwall DesignSpiral Water WallVertical Water Wall
(with Rifled Tube)
Velocity: HigherVelocity: BASE
Tube: LessTube: BASE
(1)Simple Structure- Easy Manufacturing and Construction- Shorter Installation Period- Less Thermal Stress
(2)Low Pressure Drop of Water Wall- Low Auxiliary Power Consumption- Low Temperature Imbalance
(3)Easy Removal of Slag- Less Slag Accumulation- No Local Concentration of Slag
Merits of Vertical WW to Spiral WWMerits of Vertical WW to Spiral WW
Mitsubishi Super Critical and Supercritical Coal Fired Boiler wiMitsubishi Super Critical and Supercritical Coal Fired Boiler with Vertical th Vertical Water WallWater Wall
Gross Calorific Value (Moist,Mineral-Matter-Free Basis,btu/lb)
Fixe
d C
arbo
n (D
ry/M
iner
al-M
atte
r-Fr
eeB
asis
, %)
Meta-anthracite
Anthracite
Semianthracite
Low VolatileBituminous
Medium VolatileBituminous
High VolatileA Bituminous
High VolatileB Bituminous
High VolatileC BituminousorSubbituminous A
LigniteSub-BituminousB,C
Various Sources of CoalVarious Sources of CoalAustralia Australia USAUSACanadaCanadaIndonesiaIndonesiaSouth AfricaSouth AfricaChinaChinaColumbiaColumbiaRussiaRussiaNew ZealandNew Zealand
Operation Results of Maizuru #1 BoilerOperation Results of Maizuru #1 Boiler-- Boiler Efficiency Boiler Efficiency --
85
90
95
150 300 450 600 750 900Boiler Load (MW)
Boi
ler E
ffici
ency
(%)
Guarantee
Test Result
Boi
ler e
ffici
ency
as
HH
V b
asis
(%)
Operation Results of Maizuru #1 BoilerOperation Results of Maizuru #1 Boiler-- NOx Emission NOx Emission --
Performance of Commercial PlantPerformance of Commercial Plant
42
45
48
ConclusionConclusion1.1. We can supply and construct We can supply and construct whole coal whole coal
fired plantfired plant and and IGCC plantIGCC plant with single with single responsibility.responsibility.
2.2. Reliability and high performance of MHIReliability and high performance of MHI’’s s latest design for supercritical boiler latest design for supercritical boiler (600/600C) with vertical water wall have been (600/600C) with vertical water wall have been confirmed. confirmed.
3.3. Air blown IGCC achieves higher plant Air blown IGCC achieves higher plant efficiency.efficiency.MHI will be ready for the design of MHI will be ready for the design of commercial plant immediately after 250MW commercial plant immediately after 250MW demonstration run in 2007.demonstration run in 2007.