deaerator in a thermal power plant

7/24/2019 Deaerator in a thermal power plant

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BASICS OF DEAERATOR&

CONSTRUCTIONAL DETAILS


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Purpose is Deareator


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DEAERATOR


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DESIGN CONCEPT OF DEAEARATOR

7PPB


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CEP

Main ejectorGSC

Drain

cooler

LPH3

LP heater1LPH-2

FST

BFP

D/A

Boiler

-0.9Ksc

LPT

HPH6

HPH5

FRS

HPT IPT

Feed ater line

conden!ate

20ksc

51De

5!." De

#$."

11#.9D5%!t&'r

1$! D

$.5ksc

1#0ksc&1$#.%D

1%!ksc&5%0D

1$%ksc&"%0 D

199.9D

2%1.2D

Location of

deaerator


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Principe of Deaeration

!enr"s a#$ gas solubility in a solutiondecreases as the gas partial pressureabove the solution decreases .


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Principe of Deaeration$

Sou%iit" La#$ Solubility of gasesdecreases with increase in solutiontemperature .


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TEMPERATURE EFFECT


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Why / What of Regerative Heaters?

! a si"#$e Ra!%i!e &y&$e' heat is a((e( tothe &y&$e at re()&e( average te"#erat)re *

To i!&rease the average te"#erat)re of

heat a((itio! e+tra&ti!g strea" fro" thet)r,i!e is )se( to heat the fee( -ater* This

#ro&ess is &a$$e( rege!eratio! *

The heat e+&ha!ger -here heat istra!sferre( fro" stea" to fee( -ater is

&a$$e( a rege!erator' or a fee( -ater

heater*


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Rege!erative Ra!%i!e Cy&$e


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Ty#e of Heater

There are a&t)a$$y t-o "ai! ty#es of fee(

-ater heaters*

f the stea" "i+es -ith the -ater' it is a!

o#e!fee( -ater heater*

f the stea" (oes !ot "i+ -ith the -ater '

it is a &$ose( fee( -ater heater*


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O#e! heater

A! o#e! fee( -ater heater is ,asi&a$$y a"i+i!g &ha",er' -here the stea" e+tra&te(

fro" the t)r,i!e "i+es -ith the -ater e+iti!g

the #)"#* ! a! i(ea$ &o!(itio!' the -ater i!the heater is a sat)rate( $i.)i( at the heater

#ress)re gases re"ove( o)t thro)gh ve!t*

DEAERATOR is a! o#e! heater* The "i+t)re #)"#e( ,y BFP a!( se!( to

,oi$er E&o!o"iser*


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0ove",er 12' 1345PM Revisio! 33 42

O#e! 6Dire&t Co!ta&t Fee( Water Heater


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Ty#e of (eaerator

Tray ty#e (eaerator

8#ray ty#e (eaerator


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The fee( -ater is s#raye( i! thi! fi$"s i!to a stea" at"os#here

a$$o-i!g it to ,e&o"e .)i&%$y heate( to sat)ratio!* 8#rayi!g fee(

-ater i! thi! fi$"s i!&reases the s)rfa&e area of the $i.)i( i!&o!ta&t -ith the stea"' -hi&h' i! t)r!' #rovi(es "ore ra#i( o+yge!

re"ova$ a!( $o-er gas &o!&e!tratio!s* This #ro&ess re()&es the

so$),i$ity of a$$ (isso$ve( gases a!( re"oves it fro" the fee(

-ater* The $i,erate( gases are the! ve!te( fro" the (eaerator

Deaeration process

CO0DE08ATE

Tra" t"pe Deaerator


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TRA TPE DEAERATOR


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Spra" t"pe Deaerator


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8te# te"

4 8#ray9(evi&e

1 8tea"

Chargi!g

Devi&e 68CD: ;esse$

F)!&tio!Partia$ (eaeratio!

Coo$i!g stea" to sat)ratio! te"#*

8tea" (istri,)tio!

Fee(-ater storage 6!o heati!g )# Re$ief of !o!9&o!(e!sa,$e gases Fi!a$i


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Deaerator o)t #)t

LOSS


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DEARATOR

F( STORAGE TAN)


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D t fi ti


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Deaerator configuration


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DEAERATOR


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Deaerator No**e


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PEGGING STEA+ PIPE LINE


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FWST CAPACITY


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Materia$ se$e&tio!;esse$

8tea"

&hargi!g

(evi&e

F$o- ,aff$es

8#ray ,aff$e

8#rayer

Car,o! stee$

Car,o! stee$ 6#ri!&i#a$

8tai!$ess stee$

6erosio!' high -ater &o!te!t

Car,o! stee$

Car,o! stee$

8tai!$ess stee$


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D/A =;=

C=R C;

CEP R/C

C;

H/W =;=

CR=

!,( & D,A LE-EL CONTROL

DEAERATOR SPECIFICATIONS


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DEAERATOR SPECIFICATIONS


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TRA -S SPRAP DEAERATOR


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DEAERATOR TROUBLE S!OOTING


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DEAERATOR TROUBLE S!OOTING


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DEA

ERATO

R+ODIFICATION


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deaerator in a thermal power plant

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