Tgi Nhd mdy Dien Cd Mau 1, xdy ra hien tUOng dn mdn trong mdi trUdng khi quyen do hdm lugng do xung quanh nhd mdy rit cao.. Trong bdl bdo ndy, nhdm tdc gid dd phdn tich nguyen nhdn gdy d
Trang 1NGHIEN CCrU DANH GlA HIEN TRANG VA o f XUAT GlAl PHAP , CH6NG AN MON CHO MOT SO NHA MAY DIEN KHI
CUA PETROVIETNAM
ThS Pham Vu Dung, KS Nguyen Hoai Nam, ThS Pham Thj HUcfng ThS Phan Cong Thanh, PGS.TS Nguyin Thj Le Hien
Vien Dau khi Viit Nam Emaih dungpv^vpi.pvn.vn
Tom tat
Bdo vi kim logi khdi dn mdn nhdm kio ddi tu6i tho cda cdng trinh vd thiit bj Id vdn di rdt quan trgng ddi vdi moi nen kinh ti Viic theo ddi ddnh gld biin trgng dn mdn tgi cdc nhd mdy, khu cdng nghiip se giup dUa ra cdc gidi phdp kip thdi
vd hiiu qud trong viec bdo ve chong dn mdn cho cdc trang thiit bj cua nhd mdy
Nhdm tdc gld dd tien hdnh khdo sdt, ddnh gid biin trgng dn mdn trong cdc moi trUdng khiquyin, ddnh gid dn mdn bin trong cua cdc nhd mdy diin khi thudc Tap dodn Ddu khi Quoc gia Viit Nam (Petrovietnam), cu thi Id Nhd mdy Diin
Cd Mau 1 vd Nhd mdy Diin Nhan Trgch 2 Tgi Nhd mdy Dien Cd Mau 1, xdy ra hien tUOng dn mdn trong mdi trUdng khi quyen do hdm lugng do xung quanh nhd mdy rit cao Hi thing bdo vi cathode ddng cudng bUc chong dn mdn choH^ thing dudng dng nU&c Idm mdt tgi Nhd mdy Dien Nhan Trgch 2, gid tri diin thi bdo vi chUa dat yeu cdu Trong bdl bdo ndy, nhdm tdc gid dd phdn tich nguyen nhdn gdy dn mdn vd dexudt cdc bien phdp khdc phuc hien tUOng dn mdn tgi Nhi mdy Diin Cd Mau 1 vd he thing bdo ve cathode Nhd mdy Diin Nhan Trgch 2
TUkhda: An mon nhd mdy diin khf, dn man khi quyen, bdo vi cathode sCfdung dong ct/dng bUc
l.T^ngquan
Bdo ve kim loai khdi an mdn nham mue dai tudi thp
eua edng trinh va thiet bi dong vai trd rat quan trpng doi
vdi moi nen kinh t l , Viit Nam cd khi hau nhiet ddi ndng
am, bd bien dai la d i l u kien mdl trudng gay an mdn
kim loai vdi tdc dd cao Tuy chUa ed so lieu thdng k i eu
t h i , nhung nhUng ton that do an mdn gay ra ehac ehan
khdng nhd Dae biet trong nganh edng nghiip san xuat
va c h i bien dau khf, cae t h i l t bi, va cdng trinh thudng
xuyin phdi lam viic va tiep xue vdi mdi trUdng an mdn,
do do viec theo ddi danh gid hien trang an mdn tai eae
nha may, khu cong nghiip la rat quan trpng Viic danh
gid hien trang se giOp dUa ra gidi phap kjp thdi va h i i u
qud trong viic bdo v i chong an mdn eho eae trang t h i l t
bj eCia nha may
2 Nghien cihi danh gi^ hien trang an mon cac nha may
dien khi c^a Petrovietnam
2.1 Nghien cUu ddnh gid hien trgng dn mdn bin ngodi
2.1.1 Ddnh gid hien trgng dn mon trong moi trudng khf quyen
Hai nha may d i i n khf eCia Petrovietnam dupe nghiin
eUu ddnh gld hien trang la Nha may Dien Cd Mau 1 vd Nhd
may D i i n NhPn Traeh 2 Nha may D i i n Ca Mau 1 ndm d
xa Khanh An, huyin U IVlinh,tinh Ca Mau Tinh Ca Mau la
noi giao hdi cua hai t u y l n quoc Id: Quoc Id 1 tUthanh phS CanThO va quoc Id 63 tUtinh Kien Giang.Trung tdmTp.Q Mau cdchTp Hd Chi Minh 350km, edehTp CanThd 180k|| theo dudng bd, cdch Kien Giang 102km va each bd biln khodng 40 - 50km Nha mdy d i i n Nhon Trach 2, vdi c6n| suat lap dat 750MW thupe ap 3 thdn,Tay Khanh, xa PhUdc Khanh, huyin Nhon Trach, tinh Ddng Nai, nam trong khti' cdng nghiep Ong Keo Dja d i l m nha may cdch Tp H6 Chf JVlinh v l phfa Ddng Nam khodng 23km va each qude 1651
v l phfa Tay Nam khodng 19,5km
Nha may D i i n Ca Mau 1, tuy each bd bien 40k||, nhUng do dja hinh bdng phang d ddng bang Sdng C ^ Long n i n ham lupng mudi d khu vUc nay van cao 6 ddn'g bang Sdng CUu Long ed nhllu kinh raeh, dp am khdn| khf cao, nhiet dp quanh nam cd gid trj trung binh la ^
- 40°C Mae dCi n h i i t dp eao nhUng eung khdng lam bay
h i t hoi nude t r i n b l mat vat lieu, ngupc Icii edn day nhapb toe do an mon Nlu lay toe dp an mdn d Klin Giang de tham khdo (40Mm/nam) thi toe dd an mdn d Kien Giang
g i n gap ddi Vinh PhUcva gdp 1,5 l l n tai Ha Noi Nhuvdy,
cd the danh gid sd bd tdc dd an mdn vdt lieu d Nha mdy
Dien Cd IVlau 1 vdo loai eao d nude ta Nha may D i i n Ch
Mau 1 sU dung nhiin l i i u la khf, do vay mUe dp d nhilm mdi trudng nhd may trong qua trinh vdn hdnh khdng phdi
la y l u td gdy an mdn ddng quan tdm Tuong tu, Nhd mdy
Trang 2Dien Nhon Traeh 2 cung sU dung nhien l i i u
kh( n i n mUe dp d n h i l m mdi trudng khdng
cao.Tuy n h i i n do khu vUe nha mdy g i n b i l n
hon Tp H6 Chi IWinh, md toe dd dn mdn eCia
Tp H6 Chi Minh la 40pm/nam, ed the d u bdo
toe dd an mon doi vdi vdt l i i u ndi chung vd
kim loai noi rieng d khu vUe nay eao, De xac
thuc mUc dp d nhiem mdl trudng xung quanh
hai nhd may, t i l n hanh xdc dinh eac tap khi
khi quyen bao gom SOx, NOx, H^S va dp muoi
Ham lupng SOx, NOx, H^S dupe do t r i n may
Tempest 100 (Hinh 1), dp muoi dupe xdc djnh
bIng phuong phdp nen am theo Tiiu ehuan
ASTM G140
Kit qud do tap khi khf quyin tai Nhd mdy D i i n Ca Mau 1 vd Nhd mdy D i i n Nhon Traeh 2 dUOc the h i i n trong Bdng 1
Cac k i t qud do dUpc d Bdng 1 cho thay cdc tap khf SOx, NOx, H^S chi la vet, cdn dp mudi 6 Nha may D i i n Ca Mau 1 co ham lupng Idn hOn rdt nhieu dp mudi d Nhd may D i i n Nhon Trach 2
Hdm luong mudi trong khdng khf Nhd mdy D i i n Ca Mau 1 cao Id
do nha mdy sU dung thdp lam mdt, ngudn nude cap la nude sdng Ong Dde ed ham lupng d o rdt cao Khi nUde qua thdp Idm mat dupe gidi
n h i i t va cd quat cdng sudt Idn thoi n i n hoi nUdc bay l i n keo theo mudi lam cho khdng khi xung quanh nhd mdy ed ham lupng do cao Nha mdy Dien Nhon Trach 2 sU dung h i thdng nUdc lam mat chay n g l m
n i n khong gdy ra khdng khi I m trong khf quyIn nha may
Hinb 2 Dung eg xdc dinh hdm liffffig mudi trong khong khi
theo TiSu ehuin ASTM GW
Hinh 4 Btibng Sng nilSe Idm mdt kha vUc Cooling
Tower Diin Cd Maul
Bing 1 Hdm lildng cdc tap khfkhlguyin
Hinh 5 Sirdng Sng nUde Idm mdt khu vi/e ehdm
hydrazine Bien Cd Mau 1
Dja <fi£m
Nhd mdyDi^nC^ Maul
NhdmdyP'i$nNh0nTr?ch2
1
2
1
3
Sau thdp Idm mdt CUa sdnqnliSn nudc Trudc thSp Idm m^t Xiphon GiCfa nhd mdy Sdt sonq
SOx
(mg/l) Vet Vlt V^t Vlt Vlt
NOx
(mg/l) V^t Vet Vet Ve't' Vet
H.S (mg/l) Vlt Vlt Vlt Vlt
06 mudi
(mg Cr/mVngdy) 561,90 140,40 8,66 6,92 ' 1 2,59
Trang 3Hinh 8 Bon ehiio HO tai Nhd mdy Dien Cd Mau 1 Hinh 9 Bifdng ong nadccOu hda tai Nhd mdy Bien Nhdn Trach 2
^•MH
Do ham lUpng muoi trong k h o ^ khi cao nen tai Nha mdy Dien Cd Mau
1, quan sat bdng m i t ed t h i thay rIt nhilu Idp phLi bi bong trde, dudng ong, t h i l t bj bi an mdn, edn tai Nha may Dien NhOn Trach 2 hien tupng nay rat it Mdt sd hinh dnh bong troc idp phu, gi an mdn tai Nha may eien
Ca Mau 1 (Hinh 3 - 8) Nhd mdy filen NhonTraeh2{Hinh9-12) Bin canh viee quan sat bdng m3t
thudng, tien hanh do chieu ddy vi
kiem tra khuylt tat Idp phO theo thcd gian, hai dot do cdch nhau 4 than^ Ket qua do dupe t h i hien tren Bdng4
va 5 Cae vi tri do dupe khao sdt danh gid va xdc djnh la nhUng ^ I m e6 nguy
CO an mdn cao nhat Chilu ddy mang son dupe do t r i n may Positector 6000 cua hang DeFelsko va khuyet tat dUOc
do tren mdy Holiday Detection cua hang Elcometer
Hinhll.BifcmgSngddnkhi
Hinh W Oitdng ong ddn ddu tai aha mdy Dien Nhan Trach 2
Hiah 12 Budng ong m/dc idm mdt Nhd mdy Bien Nhan Tmch 2
Trang 4Cac k i t qud tai Bdng 4 va 5 eho thay da s6 chieu day
Idp son tai hai nhd mdy sau hai dot kiem tra mUc dd suy
gidm khdng ddng k l , va khong phat h i i n khuyet tat Idp
phu tai vj tri nao, duy chi cd dudng dng dan NaOH tai Nhd
may D i i n Ca Mau 1 Idp sdn bj bong trde
2.1.2 Ddnh gid hien trgng dn mdn trong moi trudng ddt
Oi xde djnh mUc dp an mdn trong mdi trudng dat tien
hanh do d i i n trd suat d i t tai hai nha may bang thiet bj Miller 400D eua hang MC Miller, k i t qud dUpe the hien tai Bdng 2 va 3
Bing 2 Biin trd suStdSt khu vi/cHhd mdy Biin Cd Maul
D i ^ n t r d suat dSt {0.em)
Vi t r i 1 (qan t h a p lam mdt) 489,84
Vi t r i 2 ( g i n eCfa song) 339,12
Vi t r i 3 {nhd dieu hanh) 8553,36
Bdng 3 Biin trd sudt dat khu virc Nhd mdy Bldn Nhan Trgch 2
P i $ n t r d suat dat (n.cm)
Bdng 4 Chiiu ddy mdng san vd khuyit tdt Nhd mdy Biin Cd Mau 1
TT
2
3
4
5
6
Ten dirdng 6ng
0Udng6ngddn dlu
Oudng dng nUdc lam
mdt kfn
Dudng dng nUdc idm
mdt khu vUc Cooling
Dudng dng nUdc thdi
Dudng dng dSn NaOH
(SS304)
Dudng dng nUdc Idm
mdt cum chdm do
DUdng ong tSi tuSn
hodn nude ngUng(c6
chdm hydrazin)
L6hdil2(HRSG12)
Bin HCI
Dilm DAU 01 (E) DAU 02 (E) DAU 03 DAU 04 NKOl (E) NK02 (E) NK03 NCOl (E) NC02 NC03 (E) NC04 NCOS NC06 NC08 NCIO
N C l l NCI 2 NCI 3 NTOl (E) NT02Cn NT03 (E) NT04CD XOl
N C 1 6 ( D NCI 8(E) NNOl (E)
C o 0 1 { l n g k h 6 i )
Co02 (thdnh 16)
1
3
Chilu ddy m^ng son (Mm) (ddt 1)
378
246
228
240
228
460
655
654
622
664
588
640
650
648
640
388
466 San bi bong tr6c
515
466
468
290
233
240
438
358
Khuylt tat (d<ni) Khong Kh6ng Khdng Khdng Khdng Khdng Khdng Kh6ng Khdnj Khdng Khong Khong Khong Khong Khong Khfing Kh6ng Kh6ng
Khong Khdng
Khdng Kh6ng Khfing Khong
Chilu ddy mang sdn (Mm) (dot 2)
375
230
^ 225'
220
215
224
453
452
648
604
615
656
660
580
608
633
651
642
403
635
383
460 Son bj bong trde
510
461
465
288
230
348
350
354
Khuyet t | t (dtft2) Khong Khong Khong Khong j Khong ' Kh6ng Khong ' Khdng Khong Khdng Khdng Khong Khong Khong Khong Khdng Khdng Khfing
Khdng Khdng
Khong Kh6ng Kh6ng Khdng Kh6ng
Trang 5TT T6n dudng ong
2
5
7
8
Dudng dng nUde Idm mdt
tuSn hoan (supply)
DUdng 6ng nudc Idm meit
tuSn hoan (return)
Dudng ong nudc Idm mdt
phu {AUX.CWS)
Dudng ong nUdc Demi
Dudng dng tai tuin hodn
nudc ngUng (co cham
hydrazin)
Dudng dng dan dSu
Du6ng 6ng dan khf
Dudng 6ng nudc cUu h6a
Thdnh 16 hoi
Bing S Chiiu ddy mdng son vd khuyit tdt Nhd mdy Bien Nhan Trgch
Diem Chilu day m&ng sdn (Mm) (dot 1) N.TH01 (E) 464 N.TH03 (E)
N,TH02 N,TH04 N.TH05 (E) N.TH06 (E)
N.TH07 (J)
I^,TH08 (E) N.TH09 (E) N.THIOO") N.TH 11(E) N.TH 12(E) N.TH 13(E) DOOl (E) DO02 (E) D003 (E) DO04 (E) DO05 (E) D006(D D007(D D008CT)
282
430
1034
468
430
380
446
302
460
430
310
316
390
385
380
378
360
320
320
380 GAOl (E) ' 380 GA02 (E)
GA03 (E) GA04 (E) GA05 (E) GA06 (E) GA07 (E) GA08 (E) GA09 (E) N.CHOI CoOl Co02 Co03 Co04
380
360
336
290
460
270
270
380
246
506
440
410
400
Khuyet tat (ctdtl) Khonq Khdng Kh6ng Kh6ng Kh6ng Khong Kh6ng Khong Khonq Khong Khong Kh6ng Khong Khong Khdng Khdng Kh6ng Khong Kh6ng Khong Khonq Khdng Khonq Khdng Khong Khong Kh6ng Khong Khdnq Khdng Son phong r6p Khdng Khonq Khong Kh6ng
Chieu day mdng Sdn ! Khuyet tdt (Mm) (ddt 2) (ddt 2)
460
280
425
1030
460
425
377
440
300
458
425
306
310
385
380
375
370
352
310
312
374
377
375
356
330
288
459
270
268
378
240
504
438
410
400
Khdnq Kh6nq Khdnq Kh6ng Kh&ng Khong Khonq Khong Khong Khong Kh6nq Khonq Khong Khflng Khdnq Khdng Khdng Khong Khflng Khong Khflng Khong Khdng Khong Khflng Khflng Khflng Khong Khflng Khflng Son ph6ng r^p Khflng Khflng Khflng Khflng
Biog 6 Miicdd dn mdn thip difii trin dien trd suit 35t
e i f n Xrdsuit dSit (n.cm)
0-500
500-1.000
1,000-2,000
2.000-10.000
Trin 10.000
IVIUcd^jinmdn
An mfln manh C6an mfln
An m6n trung binh
An mdn nh?
An mon khdng ddng k l
Hgii6n: NACCamosloa basia
Ap dung mUc dd an mdn t h i p trong dat dUa vdo d i i n
trdcCia d i t theoTiiu ehuan cilia NACE (National Assodation
of Corrosion Engineers) (Bdng 6) vd ket qud do di^n trd sudt
ddt tai hai nhd may (Bdng 2,3) cd the thay gld trj dien trd
suit d i t dupe chia 1dm hai viJng Ung vdi hai mUe dd dn mdn khdc nhau VUng cd mUe dp an mdn cao tai vj trl 1,
2 eCia Nhd mdy Dien Ca Mau 1 vd vUng cd mUc do an mdn trung blnh tai vj trf 2,3 cCia Nha may D i i n Nhon Trach 2 Liin quan d i n an mdn trong moi trUdng dat tai NhS mdy Dien Nhon Tr^ch 2 ed sU dung h i thong bdo v$
cathode dong cudng bUc di bdo v i eho h i thdng dUdng
dng nude 1dm mdt H i thong dudng dng nudc 1dm mdt gdm: DUdng dng nude Idm mdt cung cap (supply) vd dudng dng nudc 1dm mdt tuan hodn (return) Qua khdo sdt cho thay d i i n t h i bdo v i tai hai b i l n dp chfnh luu I&
Trang 6-432mV va -817mV {so vdi d i i n cue Cu/
CuSO^), vdi d i i n the bao v i nay he thong bdo
v i cathode hoat ddng chUa h i i u qud Theo
Tieu ehuan NACE Rp 0169, dien the bdo ve
phdi dat gid tri -850mV den -1.050mV (so vdi
diin cue Cu/CuSO^) thi h i thong dudng dng
mdi dupc bao v i phu hpp
2.2 Nghiin cUu ddnh gid hiin trgng dn mdn
ben trong
Dua theo mdi chat b i n trong eae h i
dudng 6ng, thiet bj ed nguy cd an mdn trong
nhd mdy, chpn lUa ra cde vj tride do chieu day
M6i vi tri do t r i n dudng dng thue h i i n phep
do d bdn hudng 12,3,6 va 9 gid Nguyen t i e
lUa chon cde diem khdo sat Id: Hinh 13 Diin the bdo ve eho difdng ong mfdeldm mdt Nhd mdy Bien Nhan Trach 2
Bing 7 Cbiiu ddy duimg ong, (ft/^ 6/ Nhd mdy Biin Cd Mau 1 {dot 1)
TT T e n dUcfng o n g
D u d n g d n g d a n d a u
D u d n g o n g ni/dc lam m d t kfn
D u d n g o n g n u d c lam m a t k h u vUe
t h a p lam m a t
I
4
5
6
D u d n g 6 n g nudc thdi
D u d n a 6 n q dan NaOH (SS304)
D u d n g 6ng nudc Idm m a t c u m
c h d m d o
D U d n g 6 n g tdi t u a n hodn nudc
n q u n a ( c 6 cham hydrazin)
Bfln HCI
D i e m
Ddu 1 (E)
Dau 2 (E)
Dau 3 Dau 4 'NKOl (E) NK02 (E) NK03
' N K 0 4
NCOl (E)
" N C 0 2
NC03 (E) NC04 NCOS NC06 NC07
N C 0 8 " "
NC09"
NCIO
N C l l NCI 2
NCI 4 "
NTOl (E) NT02(T)
N T ' 0 3 (E)
NT'O4TT) XOl NC16(T) NCI 7(E) NCI 8(E) NNOl (E)
^ "" 1
2
V j t r i S
9,23 7,88
9,75 10,25 10,95 9,44
9,75 10,01
10,65
1 0 , 5 4 ' 10,71
10,44 10,6 10,68
10,5 10,14 7,38 10,07 8,16 10,75 2,85 8,56 6,24 6,65 9,13 6^78
6,94
C h i l u day d u d n g cfng ( m m )
V i t r i e V i t r f 9
9,15 9,08
9,61 9,9
9,64
9,64 ; 10,15 I 9,55 9,9 10,06 9,48 10,08 10,76
9,85 10,6 10,94
10,45
10,57
10,83 1 10,79 10,65 10,95 10,6 10,56
10,53 10,52
10,66
10,61 9,76
10,2 10,4 10',69 10,2 7,7 7,6 10,09 10,02 8,6
10,75 2,16 8,59
8,78 10,38 2,28 8,21 6,74 6,75 6,38 8,6 i 9,12
" 6 ^ 9 9 1 6 , 9 5 ~ 7,71 6,76 6,75 7,62
V | t r i 1 2
9,7 " 8,01
9,77 10,88 ' 1 1 , 1 5 '
" 9 , 2 5 ' "
"9;25 10,53 10,12 11,2 11,04 f 11,02 f 10,78 i
10,68 J 10,48 10,37
10,67 10,94
~10,43 ~ j
7",28 i
7,79
6,28 6,8 8,53
Trang 7TT
4
5
8
Bing 8 Chieu ddy diidng ong Nhd mdy Biin Nhdn Trgch 2 (Sat 1}
T6n dudng j f n g
D u d n g d n g nude lam m a t tuSn hodn (supply)
D u d n g d n g nu6c Idm mdt t u a n hoan (return)
D u d n g dng nUdc Idm mdt p h u (Aux ,CWS)
DUdng 6ng nUdc Demi
D u d n g ong tdi t u i n hodn nUde ngUng (co
chdm hydrazin)
D u d n g d n g dan dSu
D u d n g d n g dSn khi
D u d n g d n g nude cUu hfla
Dilm
N.TH01 (E) N.TH02 N.TH04 N.THOS (E) N.TH06(E)
N.TH07 (J)
N.TH08 (E) N.THIOfT) N.THl 1 (E) N.TH 12(E) DOOl (E) DO02 (E) DO03 (E) DO04 (E) DO05 (E) D007(T) GAOl (E) GA02 (E) GA04 (E) GA05 (E) GA06 (E) GA07 (E) GA08 (E) N.CHOI
^
Chieu d^vduflrna 6 n q ( m m )
V | t r f 3
15,97 21,93 12,48 12,96 11,28 12,86 9,6 9,48 9,1
9 9,3 9,25 10,66 14,41 13,59 17,33 15,96 15,88 17,33 13,18
1 5 , 8 ' 8,8
Vitr(6
16,54 22,35 21,71 11,4 12,25 12,92 10,97 10.8
9 , 8 2 "
9,12 8,S 8,96 9,54 13,54 13,94 14,96 14,6 15,66 16,06 13,07 15,38 9,1
V i t r i 9
16,27 15,95 21,29 22,35 12,81 12,76 10,7 13,18 9,02 9,08 10,12
" 8,67 9,06 9,28 "
9,55 10,71 13,76 16,07 17,13 15,16
13,8 13,15 15,08 8,7
V i t r i U 16,58 18,81 21,74 12,36 11,25 10,68 11,8 9,22 9,6 9,55 8,96 9,26 8,94 10,01
15,41 15,72 15,3 15,23 12,73 14,62 8,48
Quan sdt tong the trong nhd mdy cung nhu tham
khdo kinh nghiem eua ede nhan vien trong nha mdy d l lUa
chpn vCing cd khd nang bj an mdn manh nhat
Lifa chpn eae nhdm dudng dng dai d i i n eho tUng
khu VUc
Chpn cde vi trf chuyin ddng ehdy nhu elbow/ (khue
udn), tee (chia ba) dupc du bdo c6 tde do an mdn b i n trong
cao n h l t v i cde dUdng dng van chuyin chat Idng cd dp suat
Cdc d l l m khdo sdt duac ddnh dau tren bdn v i P&ID
Thilt bj sUdyng Id thiet bj siiu dm 37DLcua Hang Olympus
Tien hdnh do chilu ddy hai dpt, m6i dot cdch nhau 4 thang,
k i t qud duoc t h i hien t r i n Bdng 7-10:
Qua hai dot do chilu day dudng dng vd t h i l t bj tai
Nhd mdy D i i n Cd Mau 1 va Nhd mdy D i i n Nhon Trach 2
nhdn thay su suy gidm chieu ddy khdng ddng ke, khdng
cd hiin tupng dn mdn Idn xdy ra b i n trong dudng 6ng vd
t h i l t bj giUa hai l l n kilm tra
3 De xuat cac bien p h i p theo dot vh chtfng an mdn 3.1 Nhd mdy Diin Cd Maul
Qua khdo sdt ddnh gid h i i n trang dn mdn ed t h i thay Nha mdy D i i n Cd Mau 1 gap v i n de an mdn trong mfll trudng khf quyIn kha n g h i i m trpng, rat nhilu vj tri bj an mdn gdy bong troc Idp phU Nguyen nhan chfnh gdy an mdn tai nha mdy Id do hdm lupng do trong khf quyIn khu VUe xung quanh nhd mdy rIt cao S61,9mg CI"/mVngdy (cao gdp 30 l l n trong khf quyIn b i l n thdng thudng, vi dv tai Nha Trang), Nhd mdy sU dung nUdc sdng Ong Ddc d l Idm mdt, tuy nhiin, ham luong mudi trong nude sdng ndy eijng rIt eao 4.267,84mg/l Khi nudc Idm mdt quay Iai thdp
lam mdt di ha nhiit, nudc bdc hoi theo edc cdnh qu?t eOa
thdp Idm mdt kio theo lUpng mudi bdc hof, dan den hdm lupng mudi trong khdng khf tdng cao Mdt nguyin nhdn khac khiln Idp son bj bong troc, dn mdn cd t h i do quy trlnh thf edng mdng son Mdt s6 t h i l t bj, dudng dng Idp son tU khi di vdo hoat ddng d i n nay vdn tdt, ehua cd hiin
Trang 8Bing 9 Chieu ddy dudng ong, thiet bi Nhd mdy Bien Cd Mau 1 (dot 2)
Ten tfuemg dng Diem
Dudng ong dan dSu
Di/dng ong nUde Idm mat kin
Paul (E)_
p^u2(E) ' _ j ) ^ u 3 _ D a u 4 _NK01 (E) _NK02 (E) _ NK03 _ NK04 NC02 NC03 (E) NC04
Ncds"
Dudng ong nude Idm mat
khu vUc Cooling
_NC06 N'C07 "
" N C O ' 8 ' "
Dudng dng nUde thdi
^NC09 _ _ N C 1 0 " J _ ' N C T I ' _ NCI 2 _NC1_3
~_ NCI 4 _
NTOl (E) NT02fD
Vj tri 3 9.2 _ 7,85 _ 9,42 9,71 _ 10,22 J0,9 9,4 9,5 _ 9 , 7 I
10 10,5 10,6
J 0,9
_]Q,S
_ia66_
1 0 ^ 10,4 10,55 10,62"
11
Dudng ong dan NaOH (S5304)
Dudng ong nUde Idm mdt cum
cham d o
Dudng ong tai tuan hodn nudc
ngUng (co cham hydrazin)
_NC17[E) _NC1_8JEr
10,72 9,8 10,55_
1 o,g_
10,8
10,6 10,'56 '10,3 10,5 ""
10^4 10,61 10,7 10^55 9,7 7,65
Chieu day d u d n g 6ng (mm)
V i t r i e
9,13 6,96 9,59
9,6
10,1 9,82
9,4
V i t r i 9 '
9,04
7 9,6 9,6 | _
9,5 '~~
10
V i t r i 1 2
9,65 7,97 9,9 9,72 10,82 11,1 9,2 10,4
10,32 10,5
11
107
"10,9"
" 16,5
10,71 _1_0,82 10,61 10,48
10,75
1 10,12 10,33 10,61
1 9,9 7,53
10,42 10,7 10,6 10,9 10,4 7,2
10
tupng bong trde, khuylt tdt Idp phu va suy gidm ehieu day
Idp phu (nhuthanh lo hoi, ong khdi) ehUng td Idp son tai
nhUng vj tri do ehiu dUpc dd muoi cao va cung dupe son
trong d i l u k i i n tdt, b l mat lam saeh dat ehuan, dieu kiin
phun son tot, d d i l u k i i n n h i i t dp, dp am cho phep Trong
qua trinh thi edng sdn, neu be mat khdng dxiac lam saeh
d i n t i i u ehuan can t h i l t thi sau mot thdi gian ngdn Idp
son s i bi bong troc Mat khae, trong qua trlnh thi cdng
mang sdn trong f ' e u kien dd I m khf quyen cao, mu6i theo
am s i len v: ~ d i cfi be mat Idp son va phd hdy dan d i n ,
chi cdn 1 cho bi 'ong se keo theo bong trde, dn mdn md
rpng dan
j^ , i n nhan gay n i n h i i n tuong an mdn trong
mdi t ' dng 'i quyen cd the thay bien phdp hOu hieu
nhat de 9 ^^^'""g la sU dung Idp phu tdt, thich hpp
b i n trong mdi trudng cd ham lupng muoi cao, vd quy trinh thi edng son ehuan, ed quy dinh va giam sat theo ddi chat ehe edng doan lam sach be mat; dieu kien nhiet dp
va dd am khi phun son eung can dupe theo ddi gidm sat, yeu eau phai each ly mdi trUdng am va mudi khi phun son Ngoai ra tai nhUng mat bich Id nhUng vi trf khd tiep can ed
t h i dCing Idp phu nhiit d i o bao bpc hoac dung son phCi
k i t hpp he Ue ehe bay hoi Phuong phap sU dung chat Uc
c h i bay hoi dd dUde Trung tam Nghien eUu Ung dung va Chuyen giao edng n g h i (CTAT) - Vien Dau khf Viet Nam thU nghiim va eho hieu qua tdt tai Nha may Dien Cd Mau
1 trong d l tai "Nghiin eUu ddnh gia hieu qua ehat Ue e h i bay hoi trong mot sd nha may khdu sau cua PVN" Trong de taE"NghiincUuxaydUng hudng dan quan ly kiem soat dn mdn cho cde edng trinh c h i bien dau khi"CTATthUe h i i n nam 2012 eiJng neu hudng dan xay dung quan ly bien
Trang 9Bing 10 Chieu ddy dudng Sng Nhd mdy Bien Nhon Trach 2 (dot 2)
Chieu daydirdng ong (m ' VitriS Vjtrie Vjtri9 16,51 Ten dudng ong
j Dadng ong nUde lam mat
I tuan hoan (supply)
Dudng ong nUdc lam mdt
tuan hoan (retum)
• DUdng dng nUdc lam mat
! phu (Aux ,CW5)
4 Dudng dng nUdc Demi
Dudng ong tai tuan hoan
5 I nU6c ngUng (co cham
'jHydrazin) ^
6 Dudng dng dan dau
7 Dudng ong dan khi
Dudng ong nUdccUu hoa
phap giam dn mdn bang Idp phu va hudng dan xay dung qudn ly dang an mdn
trong mdi trUdng khi quyen Hiin tai Nha may Dien Ca Mau 1 t h u i Iai Cong ty
bdo dudng d i i n Ca Mau di sUa ehUa, theo ddi bdo dudng an mdn cho nhd mdy,
nha may cd t h i khuyen eao Cdng ty nay tham khao cac hudng dan xay dUng
qudn ly eua de tai
Trong qua trinh khao sat nhdm tae gia da xae djnh dUdc 30 vj tri theo ddi
chilu day eae dUdng dng, t h i l t bj cd nguy cd an mdn eua nhd may Nha may
nen tien hdnh do ehieu day dinh ky hang nam di theo ddi dUpc su suy gidm
chilu day, tU dd danh gia ve toe dp an mdn eung nhu thdi gian hoat ddng cdn
Iai eua dudng dng thiet bj
3.2 Nhd mdy Dien Nhan Trgch 2
Van di xuat h i i n tai Nha mdy Dien Nhon Trach 2 la h i thong bdo ve
cathode bang ddng eUdng bUc chong an mdn cho dUdng dng nUdc lam mat
di ngam dudi dat Viic theo ddi va duy tri hoat ddng eho h i thong bdo ve
cathode cua nha may chUa thUe sU bdm sat, khi gia trj d i i n t h i chua dat hieu
qud can phdi ed sU d i l u chfnh ngay may bien dp chinh luu Tuy nhiin, sau khi
d i l u ehinh phdi kiem tra d i i n t h i bdo ve tai edc tram k i l m tra khdc, xem gia tn
dien the bdo ve ed qua cao khdng, n l u vUpt gid trj -1,1 OOmV cd t h i se gdy h i i n
tupng "qua bdo v i " gay an mon gion hydro Idm gidm eo tinh eua vat lieu dudng ong
E>i duy tri he thong bao vg
cathode hoat ddng mdt each hiiu qud can phdi khao sdt do diin thi tai cac tram kiem tra djnh ky hang thang Hang ndm phdi c6 mot dot khdo sat tong the toan bd h i thong bdo v i cathode tU may b i l n dp chinh luu, anode trd, cHin cUc so sanh, eac junction box (hop ndi), tram kilm tra, d i i n the bao ve dpe theo tuyln ong, each 1 m i t do 1 gia trj diin the bao ve theo Tiiu ehuan cGa NACE,
n l u ed phan ndo bi hdng h6e can phdi ehinh sUa ngay
TUOng t u Nha may Diin Ca Mau
I, Nha may D i i n Nhdn Trach 2 co the tham khdo hudng dan xay dUng quan ly bien phap gidm an mon bang Idp phu va do chilu ddy tai 30
vi tri ed nguy cd an mdn
4 Ket luan Qua khao sat va danh gid hiin trang an mdn trong eae mdi trUdng khi quyen, dat, an mdn ben trong tai hai nha may: Nha may Diin Ca Mau
1 va Nha may Dien Nhon Trach 2 eho thay;
Tai Nha mdy D i i n Ca Mau 1 van d l an mdn trong mdi trUdng khf quyIn do ham lupng elo trong khdng khf cao Cdn tai Nha may
D i i n Nhon Trach 2 he thdng bao ve cathode ddng eUdng bUe eho he thong dudng dng nude Idm mat bdi gia trj d i i n the bao v i ehUa dat yeu cau theo Tieu ehuan cua NACE Nhdm tac gid da phdn tfch
nguyin nhdn gay an mdn vd de xuat
bien phap sUa chUa ddi vdi hien tupng an mon trong moi trudng khi
quyen Nha may Dien Cd Mau 1 vd di
xuat b i i n phap khae phuc, theo doi, kh3o sdt danh gid ddi vdi h i thdng
Trang 10bdo ve cathode dong eUdng bUc bdo ve chong an mdn
eho h i thong dudng dng nUdc 1dm mat Nhd may D i i n
Nhon Trach 2,
Tai l i i u t h a m khSo
ASTM Handbook, K ;3 Corrosion, NY 1992
2 Trjnh Xudn Sen GIdo trinh an mon vd bdo vi kim
loai Dai hpc Quoe gia, 2006
3 Bdo cdo tong ket de tdi 48-08-01
(l981-l986)vd48D-01 (1986-1990).Vien Ky thudt Nhiit ddi 1987,1992
i Bdo cdo tong kit de tai KC-02 (1996-1998) Vien
Khoa hpc Vdt liiu 1998
5 Vij Dinh Cu va nnk Co sd Ky thudt Nhiit ddi Nha
xuat ban Thdng tin Ha Ndi 2002
6 FinalReportofAustralia-AseanScientificCooperatlon
Program "Degradation and Corrosion of Building Materials
in Tropics" IMS-VN 2001
7 Cole Harmonization, of building standard in South
East Asia CSIRO Project 1999
8 I.Cole and N.V.Hue Steel Corrosion map of Vietnam
Corrosion science and technology 2013; 23: p 4 - y
9 I.S.Cole, N.V.Hue 14'^ International Corrosion
Conference Cape Town, South Africa 26 September to 1
October, 1999: p 1223
10 N.Q.Tri vd nnk Sdn do phdn bo do muoi trong khi quyen Viet Nam Ja\ lieu Vien Kythuat Nhiet ddi 1988
11 I.Cole, N.V.Hue, et al Mechanism and rates of zinc corrosion in tropical countries, Corrosion Science and
Technology 2002; 31 (6): p 454 - 460
12 S.Syed Atmospheric corrosion of materials
Emirates Journal for Engineering Research 2006; 11(1): p
I -24
13 Zuhair M.Gasem Atmospheric corrosion and rebar corrosion Corrosion Forms III, ME 472, Seminar at ME,
KFUPM,2012
14 I.Groysman Corrosion for Everybody, Chapter 3, Corrosion in natural and industrial environments Springer
2010
15 K.Natesan High-temperature corrosion in power-generating systems U.S Department of Energy, Advanced
Research Materials Program, under Contract W-31-109-Eng-38.1990
16 K.Dragomiret al Research Into the effect of corrosion on damaging thermalpov\/er plant equipment 15"^
International Research/Expert Conference "Trends in the Development of Machinery and Associated Technology" Prague, Czech Republic, 12-18 September 2011
Assessment of corrosion situation and proposed solutions for
gas power piants of Petrovietnam
Pham Vu Dung, Nguyen Hoai Nam, Pham Thi Huong Phan Cong Thanh, Nguyen Thi Le Hien
Vietnam Petroleum Institute Emaih dungpv@vpi.pvn.vn
Summary
Protection of metal from corrosion to increase the lifetime of structures is a very important issue in the economy The monitoring and evaluation of corrosion situation will help factories and industrial zones devise timely and effec-tive measures to protect their facilities from corrosion
The authors have investigated the corrosion status in atmospheric conditions and evaluated internal corrosion in Petrovietnam's ^vv^f" Plo^fs, including Ca Maul Power Plant and Nhon Trach 2 Power Plant In Ca Maul Power Plant, atmospheric osion has occurred due to a high ievel of chloride in the environment around the plant
-d current cathodic protection system applied for the cooling system of Nhon Trach 2 Power Plant has
•J potentiaL In this paper, the authors analysed the causes of corrosion and proposed several
solu-70 problems In Ca Mau 1 Power Plant and for the cathodic protection system of Nhon Trach 2 Power
The in-i)
shown I'' '
tions tr
Plant
Key •-•.'-•rrosion in gas power plant, atmospheric corrosion Impressed current cathodic protection