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1
WELCOME TO
PRESENTATION ON
SUPERCRITICALBOILERBy
OPERATION TEAM
APML,TIRODA
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2
Introduction to SupercriticalTechnology
What is Supercritical Pressure ?
Critical point in water vapour cycle is a
thero!ynaic state where there is no clear!istinction "etween li#ui! an! $aseous state
o% water&
Water reaches to this state at a critical
pressure a"ove ''&( MPa an! )*+ oC.
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Rankine Cycle SubcriticalUnit
3
1 - ! CE" #ork - $ ! L" %eating$ - & ! '(" #ork & - ) ! %" %eating) * + ! Eco, WW+ * !
Superheating * . ! %"T Work
. * / ! Reheating/ * 10 ! I"T Work 10*11 ! L"T Work 11 * 1 !
Condening
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Rankine Cycle Supercritical
Unit
4
1 - ! CE" #ork
* ! Regeneration
- $ ! 'oiler
Superheating
$ * & ! %"T e2panion
& * ) ! Reheating
) * + ! I"T 3 L"T E2panion
+ * 1 ! Condener %eat
re4ection
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5
AbsoluteAbsolutePressurePressure
(Bar)(Bar)
SaturatioSaturatio Te!"erature Te!"erature
((ooC)C)
Latet #eatLatet #eat($ %&$')($ %&$')
55
1515
22
221221
2*42*4
342342
3**3**
3+43+4
1*41*4
1414
5,25,2
56RI6TIO7 O( L6TE7T %E6T
WIT% "RESSURE
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Nu-leate boili' is a t."e o/ boili' t0at taes "la-e 0e t0esur/a-e te!" is 0otter t0a t0e saturate ui te!" b. a -ertai
a!out but 0ere 0eat u is belo t0e -riti-al 0eat uNu-leate boili' o--urs 0e t0e sur/a-e te!"erature is 0i'0ert0a t0e saturatio te!"erature b. betee 4C to 3C
*
8eparture 9ro: 7ucleate'oiling
PRESSURE(ksc)
D E N S I T Y
WATER
ST
EAM
175 224
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+
Supercritical 'oiler Water
WallRi;e Tube 6nd S:ooth Tube
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7atural Circulation 5< OnceThrough Syte:
6
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7ro! CR#Lie
7ro! 7RSLie
BoilerRe-ir-ulatio
E-oo!i8er P0ase 1
E-oo!i8erP0ase 2
LTR#
LTS#443C
7R
#
Plate#eater
9ier#eaer
7S#
To #P Turbie To IP
Turbie
Se"arator
Botto!Ri'
263C
32*C
423C
4+3C
4*2C
534C52*C
5+1C
5*,C
324C
26C
NR:
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1
(eed #ater control
I ;ru! t."e Boiler 7ee ater o-otrol b. T0ree ele!et -otroller1;ru! le1)
3O#;(O
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11
8i=erence o9Subcritical>)00MW? and
Supercritical>++0MW?
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SU' CRITIC6L
DESCRIPTION SUPERCRITICAL
(66MW)
SUB!CRITICAL
(5MW)C"#c$%&'" R&'" 1 Oc*!'+#$,1
Ass"s'*- C"#c$%&'",!4
N&'$#&% c"#c$%&'", 7!/
0**- W&'*# 0% C'#% !W&'*# ' 0$*%R&'"
(71)
!O3DR(22!5 OC)
!L&- D*&-
T+#** E%**' C'#%
!0**- W&'*# 0%
!MS 0%
!D#$ L**%
L&'*' 3*&' A--"'" N"% 3*&' &--"'" #*
S. E'+&%y L M#*
S. C&% cs$'" L 3"+
A"# 8%9 D#y 8%$ &s %ss L 3"+
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Cotiue
DESCRIPTION SUPERCRITICAL
(66MW)
SUB!CRITICAL
(5MW)C&% : As+ +&-%" L 3"+
P%%$'" L 3"+
A$;. P*#Cs$'"
L M#*
O*#&%% E88"c"*cy 3"+
(4!42
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Cotiue
DESCRIPTION SUPERCRITICAL
(66MW)
SUB!CRITICAL
(5MW)
M&'*#"&% @ I8#&s'#$c'$#*
(T&*)
L
752 MT
3"+
>2 MT
S'' $ T"* L*ss M#*
B% - %ss N"% M#*
W&'*# Cs$'" L*ss M#*
14
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15
Water Wall 8eign
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W6TER W6LL6RR67@EME7T
1*
Botto! s"iral ? to"
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1+
S"IR6L 5S 5ERTIC6L W6LL
5ERTIC6L W6LL
Less as0 e"ositio oall
Less !ass o9ore u!ber o/ tubes
9ore boiler 0ei'0t /orsa!e -a"a-it.
No ui/or! 0eati' o/tubes a 0eat tras/eri all tubes o/ ==
S"IR6L W6LL
9ore as0 e"ositio
9ore ui !ass o
Less u!ber o/ tubesLess boiler 0ei'0t
Ui/or! 0eat tras/era ui/or! 0eati' o/
== tubes
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16
(urnace 6rrange:ent
-RTICAL T.P-
SPIRAL T.P-
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1,
Supercritical Sliding "reure'oiler Water Wall 8eign
Co:parion o9 5ertical Walland Spiral Wall
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2
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21
6h accu:ulation on
#all Vertical water walls Spiral water walls
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Super Critical BoilerMaterials
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A!vance! Supercritical Tu"e Materials
/)00 "ar12000c12'00c3
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Material Co:parion
DescriptionDescription 660 MW 660 MW 500 MW 500 MW
Structural SteelStructural Steel Alloy SteelAlloy Steel Carbon SteelCarbon Steel
Water wallWater wall T22T22 Carbon SteelCarbon Steel
SH CoilSH Coil T23, T91T23, T91 T11, T22T11, T22
RH CoilRH CoilT91,Super 304T91,Super 304
HH T22, T91,T11T22, T91,T11
LTSHLTSH T12T12 T11T11
Econoi!erEconoi!er SA10"#CSA10"#C Carbon SteelCarbon Steel
Wel$in% &oint' ()re''ure )art'*Wel$in% &oint' ()re''ure )art'* 42,000 +o'42,000 +o' 24,000 +o'24,000 +o'
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Steam Water CycleChemistry Controls
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2*
S&S&
4o&4o&
Paraeter Paraeter Su" CriticalSu" Critical Super CriticalSuper Critical
((
Type o% 5oilerType o% 5oiler
waterwater
treatenttreatent
LP an! 6P !osin$& Or LP an! 6P !osin$& Or All olatile TreatentAll olatile Treatent
/6y!ra7ine 8 Aonia3/6y!ra7ine 8 Aonia3
4o 6P !osin$4o 6P !osin$ Co"ine! water treatent /CWT3&Co"ine! water treatent /CWT3&
''SilicaSilica 9 '0 pp" in %ee! water an! stea,9 '0 pp" in %ee! water an! stea,
9 ':0 pp" in "oiler !ru9 ':0 pp" in "oiler !ru
Stan!ar! value 9(: pp" in the cycleStan!ar! value 9(: pp" in the cycle
-;pecte! value 9(0 pp" in the cycle-;pecte! value 9(0 pp" in the cycle
))p6p6
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2+
A$anta%e' o- SC Tec.nolo%y
I ? %igher cycle eAciency :ean "ri:arily
@ less /uel -osu!"tio
@ less "er 9= i/rastru-ture i
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26
ECO7OMB
Higher Efficiency (η%)•Less fuel input.•Low capacity fuel handling system.
•Low capacity ash handling system.•Less Emissions.
Approximate improement in !ycle
Efficiency"ressure increase # $.$$ % per &ar
'emp increase # $.$ % per deg
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2,
Increae o9 Cycle EAciency due toStea: "ara:eter
.241
175 5./ @ 5./
5./ @ 566
566 @ 566
5/ @ 6
6 @ 62
2,**
:,*<
),*+
:,*+
+,?(
',*2
+,'2
),++
(,+*
),)*
',2+
0,*:
',+'
(,*?
0
1
2
.
4
5
6
7
/
>
1
6P 1 R6 outlet teperature B!e$& CPressure B"ar
Increase o% e%%iciency BA
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3
Sub< < Supercritical CycleI:pact on E:iion
P%&' E88"c"*cy9
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technology
=ater -0e!istr. is !ore stri'et i su"er-riti-al o-e t0rou'0 boiler
9etallur'i-al C0alle'es
9ore -o!"le i ere-tio ue to s"iral aterall9ore /ee "u!" "oer is reuire ue to
!ore /ri-tio losses i s"iral ater all
9aitea-e o/ tube leaa'e is i-ult ue to-o!"le esi' o/ ater allAs0 sti-i' tee-. is !ore i s"iral ater
all i -o!"ariso o/
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T%67D BOU