Paper 19 Boiler Membrane Online Ge

8/14/2019 Paper 19 Boiler Membrane Online Ge

1/16

Boiler Chemistry Management using coordinated approach of Chemicals, Membranes & Online Monitoring Page 1 of 16Authors: Rajendra Prasad Kalakodimi*, Mel J. Esmacher+

! " #$%% & '%

()'*+,,++&-. /++/01123,456-.

7! 8! 99 (( :(:;)8 & 877:8 ?(:877 :! 897=:! 8:! ( ! (: 8 &7 88 7 :8!887:777?"6!@()

A:"8!788(: 8 7:! ( : 87(: (7 (:8:898(:(887(897!((:8888:!: 97( (7 7! 9! (( : 79 ( :7977:7:(:: 9:!(88>:B 7 : : : =:8 9:'9 (( 8 8 : ( :!B '7:7?(:( ( ! : : (: ;) : !(8!7!89(F799:(9! : :9 ( :


2/16


((97!@8:!):E8: 9(:> : 8FG88 8 8 : (:"(::8:::8:(:&8!7978!8((: : =: ( > 8 (=::9!8::(:!:(77:8?((7&887:77H7?"!@(7

!( @ 7 :789!7:99@8;888:!88;G!9

J,,,1

1As a general rule, the requirements for attemperation spray water quality are the same as those for steam purity. In

some cases boiler feedwater is suitable. In all cases the spray water should be obtained from a source that is free ofdeposit forming and corrosive chemicals such as sodium hydroxide, sodium sulfite, sodium phosphate, iron, and copper.The suggested limits for spray water quality are:


3/16


!"#$!%!$!&'&'&(&

&'&'&(&

88;G


4/16


% KF"?2 O F6 K%"?2 O "?% ;89(!!@ 8: ! -68 ( (( >89(!!@8:!-"?% ;! : ( ! ?>! ( ::

((88(78:89(>!:9::&8(>! 898 ;$>988%-I ;F"?2


5/16


Figure 2 Oxygen pitting in a boiler tube

)778:!8:9::@:87:(7

&)9:+*,87(9@(7::(8F79(:7!((888(:((78>%,,G(%

Figure 3 Creep Blister Rupture, External View

Figure 4 Waterside Deposit Build-up, around Failure

97 ( 8 (7 (@ :8;>:87:9>(%88;(7:


6/16


88>8:(8(5'A06887 8 ! ' 88 ( 8:!

Figure 5 SEM View of Deposit Cross Section

Figure 6 SEM-EDXA Map of Cu Concentration


7/16


Figure 7 SEM-EDXA Map of Fe Concentration

&8 ( ! 8 8 =: ( 9-

:: : (7 ! ( >: 7 !(888(::8:8"9( (888 : 8 ( (7 889((7

*+

:8::99>!9 (7 "! : 9 : !@

!@!=: )!@!=:9798 8 ( !@ :8 885(9>!9!8(88H9 >(9 : :9 ( ( (89:((!F8:!(7 !7: 9 >! 8 89 89 98F9(/,/+@:((7:!8 ( :(: 7 9 9! : (8>9:8!%,

6 : ( 7 8 : ! (

778(888:8(F79:(7!:7"=:!8 ! 7! 97997!8!>!8:(78!9(7:>@ :8 7 8 ::! =: ! 9!8:! (78 !( !


8/16


:!9 >! 9 (8F'9;6Q:

'8: : 7 8:! (7 : 88' 8 ( 9:(88' (789(7=:!9(@:887 : 88::!>!8 7 (: :9 ! 7: 77 @7 ! : ( 887 8! (88:(( :(( ( 88 7 @ 8 ( : 8 ( :( ! @ :'8 A8 @ (7 8!8 ) : : 9 (:8 8! ( :7 8 9

::(6:(::(88@9

Coordinated and Congruent Phosphate(:(88!8IG*(!$/I, 7 : 98 88G8F ( ( :(!-K?FOK%F?IK2?IOF%?6 7 9 (7 : 7 7 :88 7( : 88 & ( (7 8 7 7:88(:88(7-F"OK2?IK%F?IOK")! ! 88 ;: 88 2, $


9/16


: 8!8:8 :8 &8(! :'8 : 88 : ! 7 :!)!::8:::88:379(:8*/,R;2$,R"


10/16


Figure 8. Relative corrosion of carbon steel by HCI and NaOH at 590F (310C). (Berl and

vanTaack, 1930; Partridge and Hall 1939)

Figure 9 Coordinated Phosphate/pH Control Chart

%,,)"4:!9(::!8::::(&(7((9789:!(788::7(78:(::8!(79!(:>%8((((:7::8:A8(:>!: 8: &( >98 :: : 8:8(::F!8( 7 8: ;7/,,8


11/16


9!)7778(8!>8F'%77:889!: $,7 9 8:8(66666F'% @666678((:8!76678!F'%79:!:(6:$,7 F'% 9 7 :! 66 66 =:96

Figure 1 Research Economizer: Relative Iron Transport

: ( 8 - $*,,'8 $%*,'8 88 $*,,'88$*,,'8:!&(:( F'%7 : ! :9 8 878:(:(78!(((79888F7:7788(7!((:88( ( 8 ! 7 8 : 8! 88788 : 7 & 77(J%*883,,88(:(8!&77(J*,882,,88&7(J$88$+887(:7(J$,88$*,88

Improve Feedwater Chemistry with RO ( 9 ;? :8(!7!8(9!?(7!(:! @!77! 8 9 7 8 =: ( 8 6 ?! 8 7 : ( @ 8 (! 89 8:! 8: 8

F


12/16


(7 ( 8 :8 9:(?98?(:87:!898:!(!(:8(:!7&)!-$

6457(!897(7(*,P1*P'@(:87%*P*,P:8: +,,I*,%%, $%* 8>: 777:9!(!2,,,S5G(+,,8*,,,S5G(I*,878:)77(*,8(9(!H7'8:=:777(:(:'(((7!":9!(77!:$,,,S5G%,,, S5G: ( :'(( 7 A:

7 8 77 : 87:9!7 8( A8 ( 7 ( :8 9 (7!9::85:(::(7!9:77=: 9! (7 7 6! 77 ( : 7 ((9 (8 7 ( 77 !7:9!:877:"=:!7779((7'8:(:(:(98& 78 87 :: 7799787:9!7:77997 ( 8 8 : 7 :9! ?8 7 :7799::!8:7:::77'((7::9(:8:&?!((:8789:(:?8 :9! !8! ( $* 2, S5G 898(7)779:!79!(%P$,P((78=:!((7!'8?!!9(7779%*,,,,)48!6! :;


13/16


88 8: : (7 7 )8(!8:8(:(:&8 7 (7 : ( 8 :8 8:(7!(899::8(: 8 ( ! 8 :@ ;5N K6


14/16


$6(?:>5((7':'8:%6(?:((>9A!:&>!(:''8:248:? 8>F5( (:''8:I?8:A&9:&>8:8:!7('8:

Online monitoring of boiler feedwater6!(9!8:8&(:!(8((!&8F":9!:8()!;?":(?"(7 7 988: ( !8! 7 8: 7 8:! =: & > 8! 8 :(9!(8:(::!758:79=:8(9:.#%$&,,+$/6!&:99?"!(:89:!@(((:H?"6!@97 9 )! : :'(( 5:8?> ;5"?::(78::!7!88 ?" !@88 (8 7> =:7>@8(9!8: 8 >@ 7 8:( 9 8: : > : ! 89 ( 8 : :8:!8:(?"

)!::'((5:8?>;5"?::(78::!7! 8 8 4 > 8 :8 7:8?"9(8:8:8: 7 8 9 8 88 8: 7 ! : 8 89 ' !8("?"87888:(9((( 6! &: :(: ! ?" : 7 65'889

(';A*//1


15/16


Figure 2 .0&,1223$4$5/

: 7 7 (79 > 8 ?" 9

7 : =: : 8( ! 8&3,88?"&(?">98=:!89:

Figure 3 TOC Recoveries in Boiler Water

58888(!87:(=:!(::(::9778:(H(:(88:((9!=::9:( :(;!8!:!:


16/16


!$C&8("!)::D8%*::!!78:9!(&456!%,,*

% "9 : : CK9 ) " " & 7 A66889D%,,1K6"""(>8

2:"C65F! ( 75!D65!($/3/I:C?8@F'8:!5!D?:&%,,1*)! 5 " 5 88 5 C ( 9 ? &>D886"FH/IK9/'$$$//I

+F! C ! ( " 5 "D &: %I;2

Paper 19 Boiler Membrane Online Ge

Documents

Transcript of Paper 19 Boiler Membrane Online Ge