fbc boiler final
TRANSCRIPT
-
8/18/2019 FBC Boiler Final
1/56
An Overview of
FBC BoilerCompiled
BY
S.S.ACHARYA
1
-
8/18/2019 FBC Boiler Final
2/56
INTRODUCTION
Boiler-
As per “THE INDIAN BOILERS(AMENDMENT )ACT!!"
#Boiler$ me%&s % press're essel i& *i+*s,e%m is -e&er%,ed or 'se e/,er&%l ,o i,sel 0 %ppli+%,io& o *e%, *i+* is *oll orp%r,l '&der press're *e& s,e%m is s*', o2
-
8/18/2019 FBC Boiler Final
3/56
BOILER COM3ONENTSBoiler +ompo&e&,$ me%&s
S,e%m pipi&- 4 5eed %,er pipi&-4
E+o&omi6er 4
S'per *e%,er4
%& mo'&,i&- or o,*er 7,,i&- %&d %& o,*ere/,er&%l or i&,er&%l p%r, o % Boiler *i+* iss'08e+,ed ,o press're e/+eedi&- o&e 9ilo-r%mper +e&,ime,er s:'%re -%'-e
;
-
8/18/2019 FBC Boiler Final
4/56
Single Line Diagram
BURNERWATER
SOURCE
CHEMICAL FEED
FUEL
STACK DEAERATOR
PUMPS
BOILER
ECO-
NOMI-
ZER
VENTEXHAUST GASSTEAM TOPROCESS
BURNERWATER
SOURCE
CHEMICAL FEED
FUEL
STACK DEAERATOR
PUMPS
BOILER
ECO-NOMI-ZER
VENTEXHAUST GASSTEAM TOPROCESS
-
8/18/2019 FBC Boiler Final
5/56
-
8/18/2019 FBC Boiler Final
6/56
Fuels used in Boiler
>
-
8/18/2019 FBC Boiler Final
7/56
Types of Boilers1. Fire Tube Boiler
. Water Tube Boiler!. "a#$aged Boiler
%. Sto$er Fired Boiler
&. "ulveri'ed Fuel Boiler
(. Waste )eat Boiler
*. Fluidi'ed Bed +FBC, Boiler
"
-
8/18/2019 FBC Boiler Final
8/56
Fluidi'ed Bed +FBC,Boiler
I&,rod'+,io& o 5BC Te+*&olo-
Ad%&,%-es ? Limi,%,io&s
S+ope
5'el 5le/i0ili,
Cl%ssi7+%,io& o 5BC Boilers
Des+rip,io& o @%rio's Compo&e&,s o C5BCBoiler
-
8/18/2019 FBC Boiler Final
9/56
Fluidi'ed Bed +FBC, Boiler
A& Oerie
5l'idi6ed 0ed +om0's,io& *%s emer-ed %s % i%0le %l,er&%,ie
%&d *%s si-&i7+%&, Advantages oer +o&e&,io&%l 7ri&-
ss,em %&d o2ers m'l,iple 0e&e7,s
+omp%+, 0oiler desi-&4 'el e/i0ili,4
*i-*er +om0's,io& e+ie&+ %&d
red'+ed emissio& o &o/io's poll',%&,s s'+* %s SO/ %&d NO/.
-
8/18/2019 FBC Boiler Final
10/56
Fluidi'ed Bed +FBC, Boiler
Co&,dFF.
T*e 'els 0'r&, i& ,*ese 0oilers i&+l'de +o%l4%s*er
re8e+,s4 ri+e *'s94 0%-%sse ? o,*er %-ri+'l,'r%l%s,es.
T*e 'idi6ed 0ed 0oilers *%e % ide +%p%+i,r%&-e.
1!
-
8/18/2019 FBC Boiler Final
11/56
Mechanism of Fluidized Bed Combustion
• When an evenly distributed air or gas is passed upward
through a finely divided bed of solid particles such as
Sand/Ash/Lime Stone supported on a fine mesh, the particles
are undisturbed at low velocity.
As air velocity is gradually increased, a stage is
reached when the individual particles are suspended in the air
stream G the bed is called “fluidized.
11
-
8/18/2019 FBC Boiler Final
12/56
Mechanism of Fluidized Bed Combustion
With further increase in air velocity, there is bubble
formation, vigorous turbulence, rapid mixing and
formation of dense defined bed surface. he bed of
solid particles exhibits the properties of a boiling li!uid
and assumes the appearance of a fluid " #$ubbling
%luidized $ed&.
1
-
8/18/2019 FBC Boiler Final
13/56
Mechanism of Fluidized Bed
Combustion…
A, *i-*er elo+i,ies4 0'00les dis%ppe%r4
%&d p%r,i+les %re 0lo& o', o ,*e 0ed. T*ereore4 some %mo'&,s o p%r,i+les *%e,o 0e re+ir+'l%,ed ,o m%i&,%i& % s,%0le
ss,em G “Cir+'l%,i&- 5l'idi6edBed.
1;
-
8/18/2019 FBC Boiler Final
14/56
Basics of Fluidized Bed Combustion…
5l'idi6%,io& depe&ds l%r-el o& ,*e p%r,i+le si6e %&d,*e %ir elo+i,.
I s%&d p%r,i+les i& % 'idi6ed s,%,e is *e%,ed ,o ,*ei-&i,io& ,emper%,'res o +o%l4 %&d +o%l is i&8e+,ed+o&,i&'o'sl i&,o ,*e 0ed4 ,*e +o%l ill 0'r& r%pidl
%&d 0ed %,,%i&s % '&iorm ,emper%,'re.
T*e 'idi6ed 0ed +om0's,io& (5BC) ,%9es pl%+e %,%0o',
1<
-
8/18/2019 FBC Boiler Final
15/56
Basics of Fluidized Bed Combustion…
• Since this temperature is much below the ash fusion
temperature, melting of ash and associated problems
are avoided.
• he lower combustion temperature is achieved because of
high coefficient of heat transfer due to rapid mixing in the
fluidized bed and effective extraction of heat from the bed
through in'bed heat transfer tubes and walls of the bed.
• he gas velocity is maintained between minimum fluidization
velocity and particle entrainment velocity. his ensures stable
operation of the bed and avoids particle entrainment in the gas
stream.
1=
-
8/18/2019 FBC Boiler Final
16/56
Mechanism of Fluidised Bed Combustion…
• (ombustion process re!uires the three “s that is
a. ime, b. emperature and
c. urbulence.
)n %$(, turbulence is promoted by fluidization. )mproved
mixing generates evenly distributed heat at lower temperature.
*esidence time is many times greater
than conventional grate firing. hus an %$( system
releases heat more efficiently at lower temperatures
1>
-
8/18/2019 FBC Boiler Final
17/56
Mechanism of Fluidized Bed Combustion…
• As ,*e elo+i, o % -%s oi&- ,*ro'-* % 0ed
o p%r,i+les i&+re%ses4 % %l'e is re%+*ed *e&,*e 0ed 'idi6es %&d 0'00les orm %s i& %0oili&- li:'id.
• A, *i-*er elo+i,ies ,*e 0'00les dis%ppe%r%&d ,*e solids %re r%pidl 0lo& o', o ,*e 0ed%&d m's, 0e re++led ,o m%i&,%i& % s,%0less,em.
1"
-
8/18/2019 FBC Boiler Final
18/56
Mechanism of Fluidised Bed Combustion…
B mi/i&- o sm%ll :'%&,i, o limes,o&ei,* Bed m%,eri%l4 orm%,io& o s'l'rdio/ide is red'+ed.
Ni,ro-e& o/ide orm%,io& is %lso red'+ed i&,*e +om0's,io& +*%m0er d'e ,o loer
'r&%+e ,emper%,'re i,*o', %& %ddi,io&%l+o&,rol e:'ipme&,.
T*is is ,*e m%8or %d%&,%-es o 5BC oerCo&e&,io&%l 0oilers.
1
-
8/18/2019 FBC Boiler Final
19/56
Types of Fluidized Bed Combustion Boilers
here are three basic types of fluidized bed combustion
boilers+ . Atmospheric classic %luidized $ed (ombustion System
-A%$(
. 0ressurised %luidized $ed (ombustion System -0%$(.
1. (irculating %luidized $ed (ombustion system -(%$(
1
-
8/18/2019 FBC Boiler Final
20/56
AFBC / Bubbling Bed
I& A5BC4 +o%l is +r's*ed ,o % si6e o 1 G 1!mm depe&di&- o& ,*e r%&9 o +o%l4 ,pe o'el eed %&d ed i&,o ,*e +om0's,io&
+*%m0er. T*e %,mosp*eri+ %ir4 *i+* %+,s%s 0o,* ,*e 'idi6%,io& %ir %&d +om0's,io&%ir4 is deliered %, % press're *i+* os,*ro'-* ,*e 0ed %,er 0ei&- pre*e%,ed 0
,*e e/*%'s, 'e -%ses. T*e elo+i, o'idi6i&- %ir is i& ,*e r%&-e o 1. ,o ;."m Jse+. T*e r%,e %, *i+* %ir is 0lo&,*ro'-* ,*e 0ed de,ermi&es ,*e %mo'&, o
'el ,*%, +%& 0e re%+,ed !
-
8/18/2019 FBC Boiler Final
21/56
AFBC / Bubbling Bed……..Almost all AFBC bubbling bed boilers
use in-bed evaporator tubes in te
bed of limestone/ sand and fuel fore0tra#ting te eat from te bed tomaintain te bed temperature.
T*e 0ed dep,* is 's'%ll !. m ,o 1.= m
deep %&d ,*e press're drop %er%-es%0o', 1 i&+* o %,er per i&+* o 0eddep,*. @er li,,le m%,eri%l le%es ,*e0'00li&- 0ed G o&l %0o', ,o < 9- o
solids %re re++led per ,o& o 'el 0'r&ed 1
-
8/18/2019 FBC Boiler Final
22/56
$ubbling $ed $oilers
I& ,*e 0'00li&- 0ed ,pe 0oiler4 % l%er osolid p%r,i+les (mostly limestone/ sand/
as and #al#ium sulfate) is +o&,%i&ed o&% -rid &e%r ,*e 0o,,om o ,*e 0oiler. T*isl%er is m%i&,%i&ed i& % ,'r0'le&, s,%,e %slo elo+i, %ir is or+ed i&,o ,*e 0ed rom
% ple&'m +*%m0er 0e&e%,* ,*e -rid. 5'elis %dded ,o ,*is 0ed %&d +om0's,io& ,%9espl%+e.
-
8/18/2019 FBC Boiler Final
23/56
$ubbling $ed $oilers
Norm%ll4 r% 'el i& ,*e 0ed does &o, e/+eed K
o ,*e ,o,%l 0ed i&e&,or. @elo+i, o ,*e
+om0's,io& %ir is 9ep, %, % mi&im'm4 e, *i-*
e&o'-* ,o m%i&,%i& ,'r0'le&+e i& ,*e 0ed.
@elo+i, is &o, *i-* e&o'-* ,o +%rr si-&i7+%&,
:'%&,i,ies o solid p%r,i+les o', o ,*e 'r&%+e
;
-
8/18/2019 FBC Boiler Final
24/56
$ubbling $ed $oilers222
T*is ,'r0'le&, mi/i&- o %ir %&d 'el res'l,s
i& % reside&+e ,ime o 'p ,o 7e (=) se+o&ds. T*e +om0i&%,io& o ,'r0'le&, mi/i&- %&dreside&+e ,ime permi,s 0'00li&- 0ed 0oilers,o oper%,e %, % 'r&%+e ,emper%,'re 0elo
!! de-ree C.A, ,*is ,emper%,'re4 ,*e prese&+e o
limes,o&e mi/ed i,* 'el i& ,*e 'r&%+e%+*iees -re%,er ,*%& !K s'l'r remo%l.
<
-
8/18/2019 FBC Boiler Final
25/56
$ubbling $ed $oilers222
I&+omple,e +om0's,io& res'l,s i& ,*e
orm%,io& o +%r0o& mo&o/ide (CO) pl's'&0'r&e, +%r0o& i& ,*e solid p%r,i+les le%i&-,*e 'r&%+e.
Boiler e+ie&+ is ,*e per+e&,%-e o ,o,%l
e&er- i& ,*e 'el ,*%, is 'sed ,o prod'+es,e%m.
Com0's,io& e+ie&+ is ,*e per+e&,%-e o+omple,e +om0's,io& o +%r0o& i& ,*e 'el.
=
-
8/18/2019 FBC Boiler Final
26/56
$ubbling $ed $oilers222
I& % ,pi+%l 0'00li&- 0ed 'idi6ed 0oiler4
#ombustion e#ien#y #an be as ig as23. Tis is a good 4gure/ but is lower tantat a#ieved by pulveri'ed #oal or #y#lone-4red boilers.
I& %ddi,io&4 some 'els ,*%, %re very low involatile matter #annot be #ompletely burnedwitin te available residen#e time inbubbling bed-type boilers.
>
-
8/18/2019 FBC Boiler Final
27/56
Features of bubbling bed boiler
5l'idi6ed 0ed 0oiler +%& oper%,e %, &e%r %,mosp*eri+ orele%,ed press're %&d *%e ,*ese esse&,i%l e%,'res
Dis,ri0',io& pl%,e ,*ro'-* *i+* %ir is 0lo& or 'idi6i&-.
Immersed s,e%mr%isi&- or %,er *e%,i&- ,'0es *i+*
e/,r%+, *e%, dire+,l rom ,*e 0ed.
T'0es %0oe ,*e 0ed e/,r%+, *e%, rom *o,
+om0's,io& -%s 0eore i, e&,ers ,*e 'e d'+,.
"
-
8/18/2019 FBC Boiler Final
28/56
(irculating %luidized $ed (ombustion
-(%$(• T*e &eed ,o improe +om0's,io& e+ie&+
(*i+* %lso i&+re%ses oer%ll 0oilere+ie&+ %&d red'+es oper%,i&- +os,s)%&d te desire to burn a mu# widerrange of fuels as led to tedevelopment and appli#ation of te
CFB boiler.• T*ro'-* ,*e e%rs4 0oiler s'ppliers *%e
0ee& i&+re%si&- ,*e si6e o ,*ese *i-*e+ie&+ s,e%m -e&er%,ors.
-
8/18/2019 FBC Boiler Final
29/56
(irculating %luidized $ed (ombustion
-(%$(
A CFBC #ould be good #oi#e if tefollowing #onditions are met.
1. C%p%+i, o 0oiler is l%r-e ,o medi'm
. S'lp*'r emissio& %&d NO/ +o&,rol is
impor,%&,;.T*e 0oiler is re:'ired ,o 7re lo-r%de 'el or
'el i,* *i-*l '+,'%,i&- 'el :'%li,.
-
8/18/2019 FBC Boiler Final
30/56
(irculating %luidized $ed (ombustion
-(%$(222C5BC ,e+*&olo- ',ili6es ,*e 'idi6ed 0ed
pri&+iple i& *i+* +r's*ed (> G1 mm si6e)'el %&d limes,o&e %re i&8e+,ed i&,o ,*e'r&%+e or +om0's,or. T*e p%r,i+les %res'spe&ded i& % s,re%m o 'p%rdl oi&-%ir (>!"!K o ,*e ,o,%l %ir)4 *i+* e&,ers
,*e 0o,,om o ,*e 'r&%+e ,*ro'-* %irdis,ri0',io& &o66les. T*e 'idi6i&- elo+i,i& +ir+'l%,i&- 0eds r%&-es rom ;." ,o mJse+. T*e 0%l%&+e o +om0's,io& %ir is
%dmi,,ed %0oe ,*e 0o,,om o ,*e 'r&%+e ;!
-
8/18/2019 FBC Boiler Final
31/56
(irculating %luidized $ed (ombustion
-(%$(222
T*e +om0's,io& ,%9es pl%+e %,
mi+ro&s) %re el',ri%,ed o', o ,*e'r&%+e i,* 'e -%s elo+i, o mJs. T*e p%r,i+les %re ,*e& +olle+,ed 0
,*e solids sep%r%,ors %&d +ir+'l%,ed0%+9 i&,o ,*e 'r&%+e. Solid re++le is%0o', =! ,o 1!! -m per 9- o 'el 0'r&,.
;1
-
8/18/2019 FBC Boiler Final
32/56
(irculating %luidized $ed (ombustion
-(%$(222
I& C5BC 0oiler4 s,e%m -e&er%,io& ,'0es%re &o, proided i& ,*e 0ed. T*e
'idi6%,io& o 0ed is desi-&ed ,o moem%/. solids o', o ,*e 'r&%+e %re% %&d ,o%+*iee mos, o ,*e *e%, ,r%&ser o',side
,*e +om0's,io& 6o&e +o&e+,io& se+,io&4%,er %lls4 %&d %, ,*e e/i, o ,*e riser.Some +ir+'l%,i&- 0ed '&i,s ee& *%ee/,er&%l *e%, e/+*%&-es.
;
-
8/18/2019 FBC Boiler Final
33/56
(irculating %luidized $ed (ombustion
System-(%$(222
T*e p%r,i+les +ir+'l%,io& proides
e+ie&, *e%, ,r%&ser ,o ,*e 'r&%+e%lls %&d lo&-er reside&+e ,ime or+%r0o& %&d limes,o&e ',ili6%,io&.
T*e +o&,rolli&- p%r%me,ers i& ,*e C5B+om0's,io& pro+ess %re ;Ts o&l i.e.,emper%,'re4 reside&+e ,ime %&d,'r0'le&+e.
;;
-
8/18/2019 FBC Boiler Final
34/56
(irculating %luidized $ed (ombustion
-(%$(222
• 5or l%r-e '&i,s4 ,*e ,%ller 'r&%+e
+*%r%+,eris,i+s o C5BC 0oiler o2ers 0e,,ersp%+e ',ili6%,io&4 -re%,er 'el p%r,i+le %&dsor0e&, reside&+e ,ime or e+ie&,+om0's,io& %&d SO +%p,'re4 %&d e%sier
%ppli+%,io& o s,%-ed +om0's,io&,e+*&i:'es or NO/ +o&,rol ,*%& A5BC-e&er%,ors.
;<
-
8/18/2019 FBC Boiler Final
35/56
(irculating %luidized $ed (ombustion
-(%$(222
C5BC 0oilers %+*iee 0e,,er +%l+i'm ,o s'lp*'r',ili6%,io& (G 1.= ,o 1 ) s. (;. ,o 1) or ,*e A5BC
0oilers4 %l,*o'-* ,*e 'r&%+e ,emper%,'res %re %lmos,,*e s%me.
C5BC 0oilers %re -e&er%ll +l%imed ,o 0e moree+o&omi+%l ,*%& A5BC 0oilers or i&d's,ri%l%ppli+%,io& re:'iri&- more ,*%& "= G 1!! TJ*r os,e%m
C5BC re:'ires *'-e me+*%&i+%l ++lo&es ,o +%p,'re%&d re++le ,*e l%r-e %mo'&, o 0ed m%,eri%l4 *i+*re:'ires % ,%ll 0oiler.
;=
-
8/18/2019 FBC Boiler Final
36/56
(irculating %luidized $ed (ombustion
-(%$(222
;>
-
8/18/2019 FBC Boiler Final
37/56
(irculating %luidized $ed (ombustion $oiler
-(%$(222
;"
-
8/18/2019 FBC Boiler Final
38/56
;
-
8/18/2019 FBC Boiler Final
39/56
Advantages of Fluidized Bed Combustion Boilers
)ig 5#ien#y
5BC 0oilers +%& 0'r& 'el i,* % +om0's,io& e+ie&+ ooer =K irrespe+,ie o %s* +o&,e&,. 5BC 0oilers +%&oper%,e i,* oer%ll e+ie&+ o
-
8/18/2019 FBC Boiler Final
40/56
Advantages of Fluidized Bed Combustion
BoilersFuel Fle0ibility
5BC 0oilers +%& 0e oper%,ed e+ie&,l i,* % %rie, o 'els. Ee&'els li9e o,%,io& slimes4 %s*er re8e+,s4 %-ro %s,e +%& 0e 0'r&,
e+ie&,l. T*ese +%& 0e ed ei,*er i&depe&de&,l or i& +om0i&%,io&i,* +o%l i&,o ,*e s%me 'r&%+e.
Ability to Burn 7ow 8rade Fuel
5BC 0oilers o'ld -ie ,*e r%,ed o',p', ee& i,* i&erior :'%li,'el. T*e 0oilers +%& 7re +o%ls i,* %s* +o&,e&, %s *i-* %s >K %&d*%i&- +%lori7+ %l'e %s lo %s 4=!! 9+%lJ9-. Ee& +%r0o& +o&,e&, oo&l 1K 0 ei-*, +%& s's,%i& ,*e 'idi6ed 0ed +om0's,io&.
-
8/18/2019 FBC Boiler Final
41/56
Advantages of Fluidised Bed Combustion
Boilers………
Ability to Burn Fines
Co%l +o&,%i&i&- 7&es 0elo > mm +%& 0e 0'r&, e+ie&,l i&5BC 0oiler4 *i+* is er di+'l, ,o %+*iee i& +o&e&,io&%l7ri&- ss,em.
"ollution Control
SO orm%,io& +%& 0e -re%,l mi&imised 0 %ddi,io& olimes,o&e or dolomi,e or *i-* s'lp*'r +o%ls. ;K limes,o&e isre:'ired or eer 1K s'lp*'r i& ,*e +o%l eed. Lo+om0's,io& ,emper%,'re elimi&%,es NO/ orm%,io&
-
8/18/2019 FBC Boiler Final
42/56
Advantages of Fluidised Bed Combustion
Boilers……….
7ow Corrosion and 5rosion
T*e +orrosio& %&d erosio& e2e+,s %re less d'e ,o loer+om0's,io& ,emper%,'re4 so,&ess o %s* %&d lo p%r,i+le elo+i,(o ,*e order o 1 mJse+).
5asier As 6emoval 9 :o Clin$er Formation
Si&+e ,*e ,emper%,'re o ,*e 'r&%+e is i& ,*e r%&-e o "=! G!!o C i& 5BC 0oilers4 ee& +o%l o lo %s* 'sio& ,emper%,'re +%&0e 0'r&, i,*o', +li&9er orm%,io&. As* remo%l is e%sier %s ,*e%s* os li9e li:'id rom ,*e +om0's,io& +*%m0er. He&+e lessm%&poer is re:'ired or %s* *%&dli&-.
-
8/18/2019 FBC Boiler Final
43/56
Advantages of Fluidised Bed Combustion
Boilers……….7ess 50#ess Air 9
Hi-*er CO i& 5l'e %s T*e CO i& ,*e 'e -%ses ill 0e o ,*e order o
1< G 1=K %, 'll lo%d. He&+e4 ,*e 5BC 0oiler +%& oper%,e %, lo e/+ess
%ir o&l ! G =K.
Simple Operation/ ;ui#$ Start-
-
8/18/2019 FBC Boiler Final
44/56
Advantages of Fluidised Bed Combustion
Boilers……….:o Slag Formation in te Furna#e-:o Soot Blowing
I& 5BC 0oilers4 ol%,ili6%,io& o %l9%li +ompo&e&,s i& %s* does &o,
,%9e pl%+e %&d ,*e %s* is &o& s,i+9. T*is me%&s ,*%, ,*ere is &osl%- orm%,io& *e&+e &o re:'ireme&, o soo, 0loi&-.
"rovisions of Automati# Coal and As )andling System
A',om%,i+ ss,ems or +o%l %&d %s* *%&dli&- +%& 0e i&+orpor%,ed4m%9i&- ,*e pl%&, e%s ,o oper%,e +omp%r%0le ,o oil or -%s 7redi&s,%ll%,io&.
.
-
8/18/2019 FBC Boiler Final
45/56
Advantages of Fluidized Bed Combustion
Boilers
"rovision of Automati# =gnition System
Co&,rol ss,ems 'si&- mi+ropro+essors %&d %',om%,i+ i-&i,io&
e:'ipme&, -ie e/+elle&, +o&,rol i,* mi&im'm m%&'%ls'perisio&
)ig 6eliability
T*e %0se&+e o moi&- p%r,s i& ,*e +om0's,io& 6o&e res'l,s i&
% *i-* de-ree o reli%0ili, %&d lo m%i&,e&%&+e +os,s.
6edu#ed >aintenan#e
Ro',i&e oer*%'ls %re i&re:'e&, %&d *i-* e+ie&+ ism%i&,%i&ed or lo&- periods.
-
8/18/2019 FBC Boiler Final
46/56
Advantages of Fluidised Bed Combustion
Boilers……….
;ui#$ 6esponses to Canging ?emand
A 'idi6ed 0ed +om0's,or +%& respo&d ,o +*%&-i&- *e%, dem%&dsmore e%sil ,*%& s,o9er 7red ss,ems. T*is m%9es i, er s'i,%0le or%ppli+%,io&s s'+* %s ,*erm%l 'id *e%,ers4 *i+* re:'ire r%pidrespo&ses.
)ig 5#ien#y of "ower 8eneration
B oper%,i&- ,*e 'idi6ed 0ed %, ele%,ed press're4 i, +%& 0e 'sed ,o-e&er%,e *o, press'ri6ed -%ses ,o poer % -%s ,'r0i&e. Tis #an be#ombined wit a #onventional steam turbine to improve tee#ien#y of ele#tri#ity generation and give a potential fuelsavings of at least %3.
-
8/18/2019 FBC Boiler Final
47/56
eneral Arrangements of FBC Boiler
5BC 0oilers +omprise o olloi&- ss,ems
i) 5'el eedi&- ss,em
ii) Air Dis,ri0',or
iii) Bed ? I&0ed *e%, ,r%&ser s'r%+e
i) As* *%&dli&- ss,em
M%& o ,*ese %re +ommo& ,o %ll ,pes o 5BC 0oilers
i, Fuel Feeding system
5or eedi&- 'el4 sor0e&,s li9e limes,o&e or dolomi,e4's'%ll ,o me,*ods %re olloed '&der 0ed p&e'm%,i+eedi&- %&d oer0ed eedi&-.
-
8/18/2019 FBC Boiler Final
48/56
eneral Arrangements of FBC Boiler
-
8/18/2019 FBC Boiler Final
49/56
eneral Arrangements of FBC Boiler…. . Air ?istributor
T*e p'rpose o ,*e dis,ri0',or is ,o i&,rod'+e ,*e 'idi6i&- %ir ee&l,*ro'-* ,*e 0ed +ross se+,io& ,*ere0 9eepi&- ,*e solid p%r,i+les i&
+o&s,%&, mo,io&4 %&d pree&,i&- ,*e orm%,io& o de'idi6%,io& 6o&esi,*i& ,*e 0ed. T*e dis,ri0',or4 *i+* orms ,*e 'r&%+e oor4 is &orm%ll+o&s,r'+,ed rom me,%l pl%,e i,* % &'m0er o peror%,io&s i& % de7&i,e-eome,ri+ p%,,er&. T*e peror%,io&s m% 0e lo+%,ed i& simple &o66les or
&o66les i,* 0'00le +%ps4 *i+* sere ,o pree&, solid p%r,i+les romoi&- 0%+9 i&,o ,*e sp%+e 0elo ,*e dis,ri0',or.
T*e dis,ri0',or pl%,e is pro,e+,ed rom *i-* ,emper%,'re o ,*e 'r&%+e 0
i) Rer%+,or Li&i&-
ii) A S,%,i+ L%er o ,*e Bed M%,eri%l or
iii) P%,er Cooled T'0es.
-
8/18/2019 FBC Boiler Final
50/56
eneral Arrangements of FBC Boiler……..
Bed @ =n-Bed )eat Transfer Surfa#e
a, Bed
T*e 0ed m%,eri%l +%& 0e s%&d4 %s*4 +r's*ed rer%+,or or limes,o&e4i,* %& %er%-e si6e o %0o', 1 mm. Depe&di&- o& ,*e 0ed *ei-*,,*ese %re o ,o ,pes s*%llo 0ed %&d deep 0ed.
A, ,*e s%me 'idi6i&- elo+i,4 ,*e ,o e&ds 'idi6e di2ere&,l4 ,*'s%2e+,i&- ,*e *e%, ,r%&ser ,o %& immersed *e%, ,r%&ser s'r%+es. As*%llo 0ed o2ers % loer 0ed resis,%&+e %&d *e&+e % loer press'redrop %&d loer %& poer +o&s'mp,io&. I& ,*e +%se o deep 0ed4 ,*epress're drop is more %&d ,*is i&+re%ses ,*e e2e+,ie -%s elo+i, %&d%lso ,*e %& poer.
=!
-
8/18/2019 FBC Boiler Final
51/56
eneral Arrangements of FBC Boiler….b, In-Bed Heat Transfer Surface
I& % 'idi6ed i&0ed *e%, ,r%&ser pro+ess4 i, is&e+ess%r ,o ,r%&ser *e%, 0e,ee& ,*e 0ed m%,eri%l%&d %& immersed s'r%+e4 *i+* +o'ld 0e ,*%, o % ,'0e0'&dle4 or % +oil. T*e *e%, e/+*%&-er orie&,%,io& +%&0e *ori6o&,%l4 er,i+%l or i&+li&ed. 5rom % press're drop
poi&, o ie4 % *ori6o&,%l 0'&dle i& % s*%llo 0ed ismore %,,r%+,ie ,*%& % er,i+%l 0'&dle i& % deep 0ed.
=1
-
8/18/2019 FBC Boiler Final
52/56
eneral Arrangements of FBC Boiler…..
T*e *e%, ,r%&ser i& ,*e 0ed depe&ds o& &'m0ero p%r%me,ers li9e
i) 0ed press're
ii) 0ed ,emper%,'re
iii) s'per7+i%l -%s elo+i,
i) p%r,i+le si6e
) He%, e/+*%&-er desi-& %&d
i) -%s dis,ri0',or pl%,e desi-&.
=
-
8/18/2019 FBC Boiler Final
53/56
eneral Arrangements of FBC Boiler….. %. As )andling System
a) Bottom ash removal
I& ,*e 5BC 0oilers4 ,*e 0o,,om %s* +o&s,i,',es
ro'-*l ;!
%oid %++'m'l%,io& %&d +o&se:'e&, de'idi6%,io&.P*ile 7ri&- *i-* %s* +o%l s'+* %s %s*er re8e+,s4,*e 0ed %s* oero dr%i& :'%&,i, is +o&sider%0leso spe+i%l +%re *%s ,o 0e ,%9e&.
=;
-
8/18/2019 FBC Boiler Final
54/56
-
8/18/2019 FBC Boiler Final
55/56
-
8/18/2019 FBC Boiler Final
56/56
FBC Boiler- O56 =5W
THANQS