bai word bao cao sua lai roi hoàn chinh

8/3/2019 bai word bao cao sua lai roi hon chinh

1/37

LI NI U

Trong cng cuc xy dng v pht trin ca t nc, ngnh in lc Vit Naml mt ngnh c v tr rt quan trng. Cung cp nng lng v thc y qu trnh sn

xut, kinh doanh ca tt c cc ngnh kinh t khc trong nn kinh t quc dn. S pht

trin ca ngnh in lc cng nh gi s pht trin, tin b ca ton x hi. Vi

nhng c trng ring ca mnh l sn xut v tiu th phi i i vi nhau. Do

p ng tt gia cung v cu th i hi ngnh in phi c s pht trin hp l: Va

c kh nng p ng nhng nhu cu hin ti va phi c s chun b cho tng lai. V

vy khng nhng ngnh in l ng lc cho cc ngnh kinh t khc m chnh ngnh

in cng phi hin i ho qu trnh sn xut sm nht kp thi cung cp cho t

nc nhng ngun in nng c cht lng cao.

Nh my nhit in Ung B l nh may c cng sut ln do Nga gip xy dng,

qua 40 nm sn xut, nh my cung cp cho li in quc gia gn 4 t KWh in

v cng ang trong qu trnh hin i ho sn xut tng khu, tng khu vc ca dy

truyn sn xut in. V cng ton ng, ton dn thc hin mc tiu Dn giu nc

mnh, x hi cng bng dn ch vn minh.

p ng c nhng nhu cu , sau thi gian hc t p trau di kin thc khoa hc

ca trng. Em tm hiu ti:

Sau thi gian 7 thc t p ti nh my nhit in Ung B . Em c Thy gio V

Duy Thun cng vi s gip ca cc Thy C gio kha Cng Ngh T ng , v

s gip ca cc bn ng nghi p n nay bo co thc t p tt nghi p ca em

hon thnh vi y ni dung yu cu v ng thi hn.Tuy nhin do thi gian c hn v kh nng kin thc ca bn thn cn hn ch, v vy

bn bo co tt nghi p ca em khng trnh khi nhng thiu st.

Em knh mong c s ch dn, gip ca cc Thy C gio trong khoa Cng Ngh

T ng, cc bn hc v phng k thut nh my in Ung B.

Em xin chn thnh cm n s gip nhit tnh ca Thy gio V Duy Thun v cc

Thy cc C trong khoa Cng Ngh T ng Trng i hc in Lc .


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NI DUNG BO CO THC TP

Chng 1: TNG QUAN V NH MY NHIT IN UNG B

1.1 Tng quan v nh my nhit in Ung B.1.2 An ton lao ng trong cng ty nhit in Ung B

1.3 Chc nng v nhim v ca nh my.

1.4 C cu t chc v qun l ca nh my.

1.5 iu kin sn xut ca nh my.

1.6 Quy trnh cng ngh sn xut in

Chng 2: QUY TRNH CNG NGH CA NH MY N UNG B

2.1 Gii thiu chung v cng ngh sn xut in nng.

2.2 Quy trnh cng ngh sn xut in nng ca nh my nhit in Ung b.

2.3 Cc h thng v thit b chnh ca nh my.

2.4 H thng iu khin v gim st trong nh my nhit in Ung b.

2.5 H thng iu khin Turbine ca nh my.

2.5.1 Thnh phn iu khin.

2.5.2 H thng trao i tn hiu ca cc chi tit ng.

Chng 3: KHI QUT CHUNG V L HI TRONG NH MY

3.1 Cu to v c tnh k thut ca l hi.

3.1.1 Cc thng s k thut ca l hi.

3.2 H thng cp nc cho l hi

3.2.1 Chc nng ca h thng3.2.2 Thit b v i tng iu khin

3.2.3 Vn hnh ca h thng

Chng 4: GII THIU V H THNG IU KHIN DCS CA NH MY

NHIT IN UNG B

4.1 Gii thiu phn cng ca DCS nhit in Ung B

4.2 Phn mm iu khin- control software


3/37

Chng 1: TNG QUAN NH MY NHIT IN UNG B

1.1 Gii thiu tng quan nh my.

Trong giai on hin nay t nc ta ang thc hin cng cuc cng nghip ho-hin

i ho t nc.Chnh v vy cn rt nhiu nng lng phc vu cho cng cuc ,c bit l nng lng in

Giai on thnh lp, xy dng, sn xut v chin u t 1961-1975: Nh my nhit

in Ung B c khi cng xy dng ngy 19/5/1961 vo dp k nim sinh nht ln

th 71 ca Ch tch H Ch Minh, vi tng cng sut t ban u l 48MW.

Giai on m rng sn xut t III & IV t 1976-2000: Nh my m rng sn xut vi

cng sut 110MW.

Giai on m rng sn xut t nm 2000 n nay :

Trc tnh hnh thc t l thiu nng lng cng nh s lac hu ca mt s nh my

in c xy dng t thp nin 60.Chnh v vy Chnh ph giao cho Tng cng ty

LILAMA lm tng thu EPC d n nh my nhit in UNG B m rng vi cng

sut 300 MW vi hnh thc cha kho trao tay v y l doanh nghip u tin ca

VIT NAM thc hin theo hinh thc ny .

Sau mt thi gian chun b v xy dng (t 2001-2006) nh my c hon thnhtrong nin vui sng ca tp th cn b cng nhn vin tng cng ty LILAMA cng

nh nhn dn c nc. Vi thnh tch ny nh gi s pht trin vt bc ca ngnh

lp my Vit Nam. N c s bin i v cht a Lilama t ngi lm thu ng

ln lm ch v li nhun( tin v kinh nghim tri thc) li VN.

Cng ty nhit in Ung B tip qun, vn hnh t my m rng 1-300MW t ngy

27/11/2009.

Ngy 23/5/2008 gi thu EPC D n Ung B m rng 2-330MW do tng thu

Chengda Trung Quc c khi cng. Theo d kin, n thng cui nm 2011 Nh

thu Chengda s bn giao thng mi cho Cng ty Nhit in Ung B.

Nhit in Ung B s thnh t hp 3 Nh my vi tng cng sut pht in l

740MW

V t chc qun l: T nm 1961 Cng ty mang tn Nh my in Ung B.

n nm 2005 Nh my nhit in Ung B i tn thnh Cng ty nhit in Ung B

hch ton c lp trc thuc Tp on in lc Vit Nam.


4/37

Thng 7/2010, Cng ty chuyn i m hnh sn xut v qun l thnh Cng ty TNHH

MTV Nhit in Ung B trc thuc Tp on in lc Vit Nam

Nh my nhit in Ung b cch th H ni khong 130km v hng ng. Nh

my in c thnh lp t nhng nm 70 ca th k XX. Tng din tch ca nh myl 320.342m2 trong 111.300m2 l dnh cho nh my nhit in Ung B m rng

v cc khu vc thi cng.

Nh my kt ni vi li in ti sn phn phi 220/110KV v u vi trm bin p

Bc ng trng bch. Ngun nguyn liu chnh cho nh my l than cm 5, than cm 6

c ly t m Vng Danh, du FO c vn chuyn bng thuyn i qua sng Ung

cp cho nh my ti trm bm du t ti ung B.

D n c thc hin theo hnh thc hp ng EPC.

+ i din ch u t: Ban qun l d n nhit in 1(EVN)

+ T vn cho ch u t: Cng ty c phn t vn xy dng in 1.

+ Tng thu EPC: Cng ty LILAMA Vit Nam.

+ T vn tng thu: nh thu Electrowwatekono

thc hin d n ny v c s h tr ca nh thu EE th nh thu LILAMA

tin hnh phn chia d n thnh cc gi thu sau:

CC H THNG CA T MY 300MW

STT H thng Tn gi

thu

Nh thu Xut x

1 L hi v cc thit b ph M1 Powermachine Nga2 Turbine-my pht v cc

thit b

M2 Powermachine Nga

3 H thng iu khin gim

st tch hp

I1 ABB Singapore

4 H thng nc kh

khong, x l nc thi.

M4, 5, 6 Gsukoshan Thi lan

5 H thng cp v d than

ng st

M7 FAM c

6 Trm bm nc tun hon

v h thng sx clorine

M8 Torshima Nht bn

7 Trm kh nn M9 Atlascopco Vit nam- M

8 H thng x l nc tro x M10 CPC Vit nam


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9 H thng kh lu hunh M11 Kawasaki Nht bn10 H thng cu ha M12 Cng ty thng long

Vit nam

Vit nam

11 H thng sn xut hidro M13 Stuard energy Canada

12 H thng ng ng v h

thng du nhin liu

M3&14 Thaitory Thi lan

13 H thng cp hi khi

ng

M18 Vin nhit lnh HBKHN-VN

14 Sn phn phi 220/110KV E1 AVERA Singapore15 My bin p chnh 353 E2 Sumitomo Nht bn16 H thng in thuc phn

cn bng nh my

EB01 ABB Singapore

17 H thng TTLL HTI Vit nam

1.2 Chc nng v nhim v ca nh my.

Nh my nhit in Ung B l mt n v thnh vin thuc tp on in lc Vit

Nam (EVN).

Thc hin ngh quyt i hi ln th III ca ng v xy dng cng nghip nng.

Nh my nhit in Ung B c c th tng Phm Vn ng b nht quc u

tin khi cng xy dng 19/05/1961, ng vo dp k nim 71 nm sinh nht Bc. Vi

tinh thn , ch sau mt thi gian ngn cc t my c a vo vn hnh.

18/01/1964 khnh thnh t 1 v tip khnh thnh t 2. Nh my nhit in Ung

b tr thnh nh my in ch lc ca h thng in min Bc XHCN.

Nh my nhit in Ung b c giao nhim v qun l khai thc, vn hnh thng

mi nh my nhit in 1 & 2 v thc hin cc dch v k thut.

Nh my nhit in Ung b m rng 300MW(giai on 1 ) a vo vn hnh vcng trnh nh my nhit in Ung b m rng 300MW(giai on 2) ang c gp

rt xy dng. Nh vy Ung b s tr thnh trung tm nhit in vi tng cng sut l

710MW, trong mt ngy gn y, gp phn bo m cung cp in n nh cho vng

tam gic kinh t H ni Hi phng Qung ninh.

S CHUNG MT BNG CA NH MY IN UNG B M RNG


6/37

Hnh 1.1 S mt bng chung nh my nhit in

1.3 C cu t chc ca nh my

Phn xngNhin liu

Phn xngL - My

PGDK THUT K TON

TRNG

PGDCHUN B SXUBMR1

PGD QLDAUBMR2

Trng ca

Gim c


7/37

xng

Hnh 1.2: C cu t chc v qun l ca nh my

Khi hnh chnh nghip v, gm: phng gim c, phng t chc hnh chnh, phngti chnh k ton, phng k hoch, phng vt t, phng k thut,

Khi sn xut, gm: phn xng nhin liu, phn xng vn hnh 1 & 2, phn

xng l my, phn xng sn xut vt liu v dch v, phn xng c nhit,

Chc nng ca cc phng ban

Ban gim c.

Gim c lnh o chung nh my, chu trch nhim trc Tp on in lc Vit

Nam v kt qu hot ng v sn xut kinh doanh.

PhngT chc- L

PhngKinh t- khochQLDA

PhngK hoch

Phn xngin kimnhit

Phng kthut

Phn xngHa

Phn xngC nhit

Phng tng hpCBSX

Phn xngSX VL- DV

Phng tichnh k ton

Phng Vt t

Phng bo v

Phn xngVn hnh 1

Phn xngT ng - K

PhngK thut- GS

QLDA

Phn xngVn hanh 2

Vn phng


8/37

Ph gim c k thut: gip cho gim c t chc iu hnh sn xut, ch o trc tip

n cc phn xng, phng ban lin quan trc tip sn xut in.

Phng t chc lao ng

C nhim v tham mu cho gim c xy dng phng n t chc , qun l, tuynchn lao ng, kim tra v thc hin tt nh mc lao ng, cc ch tin lng, tin

thng.

Phng k hoch

C nhim v gip gim c xy dng v qun l k hoch sn xut, trin khai hp

ng trong v ngoi nh my. Tham gia lp k hoch nhu cu vt t, qun l cung cp

y vt t thit b trong v ngoi nc theo ng yu cu k thut cung cp vt t

y v kp thi.

Phng ti chnh k ton.

Phng ti chnh k ton c nhim v gip gim c v qun l ti chnh, m bo

c yu cu hoch ton k ton tp trung theo yu cu ca Tp on.

Phng k thut.

Xy dng k hoch, phng thc vn hnh cho ph hp vi nhim v v tnh hnh

thit b, lao ng m bo kinh t n nh, cht lng, yu cu. chu trch nhim vn

hnh sa cha, nghin cu v tm hiu cc bin php an ton thit b.

Phng tng hp.

Phng tng hp c nhim v gip gim c qun l v gii quyt cc th tc cng vn,

giy t hnh chnh, vn th lu tr, nh my, in n ti liu. Qun l ton b hot

ng n ung phc v cn b cng nhn vin, cc hot dng v nh , t ai, cng

tc tuyn truyn.v.v

Phng bo v.C nhim v gip gim c t chc cc phng n kim tra, bo v kinh t, chnh tr

trong ton nh my cho sn xut c an ton v phng chng chy n.

khi sn xut in:

Phn xng vn hnh 1: vn hnh cc l hi v t hp my pht in thuc dy truyn

sn xut 1.

Phn xng vn hnh 2: c nhim v vn hnh v qun l t hp my pht in thuc

dy truyn sn xut 2.


9/37

Phn xng in- kim nhit: qun l vn hnh cc thit b in, t ng v o lng

trong dy truyn 1

Phn xng nhin liu: c nhim v tip nhn than theo tuyn ng sng, ng st

t cc m vo kho d tr v cung cp than ln l.1.4 iu kin sn xut ( thun li, kh khn)

Thun li.

- i ng nhn vin tr tui, nhit huyt.

- Cng ngh sn xut hin i.

- Nh my nm ti khu vc c v tr a l thun li pht trin.

- Ngun nguyn liu di do.

Kh khn.- Cng tc bo dng sa cha kh khn.

- kh thu ht c nhn ti.

Chng 2: CC THIT B CHNH CA NH MY UNG B

2.1 Cc h thng v thit b chnh trong nh my.

- L hi v cc thit b ph

- H thng in nh my.


10/37

- H thng o lng iu khin.

- Turbine my pht v cc thit b ph

- H thng x l v vn chuyn than.

- H thng x l v vn chuyn vi.- H thng x l v vn chuyn tro x.

- H thng cp nc v x l nc.

- H thng du t.

- H thng nc thi.

2.2 Quy trnh cng ngh sn xut in nng ca nh my nhit in Ung b.

Kho nhin liu dng d tr v pha trn than trc khi cp ln l. H thng cung cp

nhin liu cho l. Thit k h thng bng ti cung cp cho l, hai h thng ny lm

vic c lp k c phn cung cp in m bo lun lun cung cp than cho l

trong trng hp s c bng ti hoc s c mt in.

5

1

2

3

413

10

14

16 Khng kh

Ti ngkhi

17

12

11

96

7

8

Hnh 2.2 S khi qu trnh sn xut in nng ca

nh my

15


11/37

H thng nghin than : c thit k kiu l hi t than trc tip ( khng c than bt

trung gian). Mi l bao gm 4 my nghin than bng bi, than cp vo my nghin qua

my cp than nguyn v n c sp nng bi gi cp 1v sau dc thi thng vo

l.L hi ca dy truyn l l hi kiu tun hon t nhin, c kt cu xung quanh l cc

gin ng sinh hi, trong l than c t chy sinh nhit trao i vi nc ngng

trong cc gin ng sinh hi to ra hi bo ha tch t trong bao hi, sau hi ny

c ua qua cc phn ly dng xyclon v c a qua cc gin qu nhit to ra

hi qu nhit kh c nhit v p sut yu cu ca Turbine.

Turbine c thit k gm 3 cp p lc. Hi t l c a vo Turbine cao p, sau

khi gin n sinh cng cao p n li c a qua gin qu nhit trung gian nng

nhit ng p, sau c a vo Turbine trung p v sang Turbine h p v bnh

ngng. Cng sinh ra trn trc Turbine quay my pht in, my pht in s bin nng

lng c thnh nng lng in pht ln li.

Bnh ngng : c nhim v ngng hi thot t Turbine h p thnh nc ngng

Bm tun hon: dng cung cp nc lm mt t sng cho bnh ngng, nc lm

mt u ra bnh ngng mt phn cung cp cho h thng x l nc, cn li ra knh

thi ra sng.

Bm ngng: Bm ngng dng cung cp nc ngng cho kh kh.

H thng gia nhit h p: dng nng nhit nc ngng trc khi vo kh kh.

Bnh kh kh: s nhn hi trch t Turbine trung p gia nhit nc ngng ti trng

thi gn bo ha tch kh khng ngng.

Bm cp: dng cung cp nc cho bao hi.

H thng gia nhit cao: dng nng nhit nc cp.B hm: b hm c tc dng nhn nhit trong khi thot sau cc gin qu nhit

nng nhit nc cp gn bng nc trong nhit bao hi

B sy khng kh kiu quay: b sy khng kh kiu quay dng sy khng kh t cc

qut gi trc khi vo l.

Qut gi cp 1: dng cung cp gi i sy than v vn chuyn than vo l.

Qut gi chnh: cung cp gi cho qut gi cp 1 v cung cp oxi cho l.

Qut khi: dng ht khi thot ca l v duy tr chn khng bung la.


12/37

Nguyn l hot ng

T kho nhin liu (than, du, vi), qua h thng cung cp nhin liu 2 c a v

l 3. Nhin liu than t kho nhin liu (1) qua h thng cung cp nhin liu (2), sau

c a vo h thng nghin than (3). Ti y than c sy bi gi nng cp 1 tqut gi cp 1(15), qua b sy khng kh(14) v thi trc tip vo l (4).

Nc c xr l ha hc, qua b hm 13 a vo bao hi ca l. Trong l xy ra phn

ng chy to ra nhit nng. Khi thot ra c nhit cao c qua cc dn qu nhit,

qua b hm v b sy khng kh tn dng nhit sau thot ra ngoi ng khi nh

qut khi (17).

Nc trong bao hi c cp xung cc gin ng sinh hi xung quanh l, trao i

nhn nhit ca l bin thnh hi c thng s cao v c dn n Turbine (5). Ti y

hi gin n sinh cng quay Turbine_ my pht. My pht in s bin cng sut c

nhn trn trc Turbine thnh cng sut in pht ln li. Hi sau khi sinh cng c

thng s thp thot v bnh ngng (6). Trong bnh ngng hi nc ng thnh nc

nh h thng nc lm mt tun hon ly t sng.

Trong bnh ngng(6), nc ngng c qua cc bnh gia nhit h (9) sau c a

n bnh kh kh (!0) nh bm ngng (8). Nc sau khi c kh kh s c bm

cp (11) bm qua cc bnh gia nhit cao(12), qua b hm sau a vo bao hi.

Ngi ta dng hi trch t Turbine cung cp cho cc bnh gia nhit cao, gia nhit h

v bnh kh kh.

Chng 3: L HI NHIT IN UNG B

3.1 Cc thit b chnh v thit b ph ca l hi

ng khithot

ng khi thotB hm

H2O t gia nhit

cao n

Bao hi

b qu nhit

VI TDU VVI TTHAN

t turbine caop n

n turbine

trung p


13/37

Hnh 3.1 hnh v m phng l hi

L hi En-920-17,6-543 kiu AT c cp t than anthracite ca Vit Nam

vi hm lng cht chy l 20770 kJ/Kg, hm lng tro 27,7%, m 9,4% cht bc

u ra 3,11%.

Thng s v vn hnh l hi :

Cng sut nh mc u ra, t/h 920

Cc thng s danh nh ca hi:

p sut, Mpa 17.6


14/37

Nhit ca hi chnh v hi qu nhit trung gian, C0

543

Nhit ca nc cp, C0

254

Lung nhin liu rn vo l, t/h 137,6

p sut bao hi , kgf/cm2 194,7

Nhit hi h p u vo ca l hi, C0

337

Nhit khng kh ra ngoi, C0

122

Nhn t kh tha ca lung kh ra ngoi 1,3

Hiu sut l hi th % 87,7

Kch thc bung t l 21,8x12,8x58m, dung tch bung t l 11806 m3

. Cao

ca bao hi l 68 m. ng sut nhit ca dung tch bung t l 60000 kcal/m 3 h.

Bung t dng kn kh vi thit b vn chuyn tro kh pha di . phn trn

ca bung t (t bn ngoi), cc ng gp hi qu nhit v cc ng lin thng c

bao che bng cc hp nhit. Khng kh i vo cc hp ny b ht qua cc l trong cc

hp nhit do p sut m ca khng kh to ra t hp nhit i vo gia cc ng gi

u vo ca lc bi. y ca bung t, vch l trc v vch l sau to thnh mt

phu nghing.

khoang t c bao quanh bng cc tm vch l kn kh, c s b tr ca cc ng

v c 16 vi t c b tr vch truc v vch sau to thnh 2 lp cao 18,7 m

v 22,47 m. trn nh ca mi vi t bn trn cao 25,87m c b tr cc vi x,

to thnh mt gc 450 nghing so vi ng nm ngang. C b tr cc ca nh v cc

l thm.

Cc vi t c cu hnh xon vi hai khoang ng kh th cp. Khoang gia

c cp chun b cho vic t du nhin liu vi cc trc xoy v cc cnh qutthng. Hn hp khng kh c cun vo u vo ca vi t bng cc ng xon.

Cc ng c lp t khoang kh trung tm. lp t vi du nhin liu, cm ng

iu khin ngn la ca du nhin liu, thit b nh la v vi t. ng lp cm

ng iu khin ngn la t than mn ca vi t than uc gn trong khu vc ming

vi t than. Vi t bao gm thit b gim st ngn la t than v thit b phun m

c kh s 6 ca vi t c cp nh la phn nhin liu chnh.


15/37

Bung t c hnh lng tr vi cc cnh c kiu dng kh ng hc theo hng

i ln phn vch l sau.

C mt khu vc gm cc ng to thnh vch l bao quanh chu vi ca bung t

t cao 10,470 m (Phn trn ca phu tro) ln n cao y ca phn ti nhitnng. Trong khu vc ny c rt nhiu cc ng cao t cc vi t gia mc

10,670 m v 24,670 m bung t c lt gch chu la xung quanh.

B qu nhit bc x cao p c b tr gia cao 31,720 v 42,760 m dc

theo vch l sau ca bung t cng nh phn bn phi v tri ca vch l, phn m

tip gip vi vch l sau ca bung t. B qu nhit bc x c treo trn vch l

ca bung t bng cc thanh treo c bit v cc kp.

B qu nhit bc x h p uc b tr gia cao 38,200 m v 60,940m dc

theo vch trc ca bung t cng nh phn bn phi v tri ca vch l ni tip gip

vi vch trc ca bung t. C 16 b t vch trc v 5 b t vch cnh ca

bung t. Loi thp s dng l thp hp kim 442x .

Dc theo vch trc v bn cnh c s phn b ca cc ng n cc thit b thi

bi. B qu nhit mnh c b tr u ra ca bung t v bao gm 32 hng thng

ng vi khong cch cch nhau 642mm. Cch ng thp c gia cng ch to bngng thp Dn 42x7 mm.

Phn y bung t c lm sch bng cch phun nc ra ln n cao

35,7m. H thng phun nc ra gm 8 thit b lm sch bng nc chuyn dng.

Cc b mt gia nhit ca bung t c t cao 44 m phn ng gi v

phn pha sau c lm sch bng cc thit b thi bi co rt c hnh trnh ngn. Cc

mng v cc b mt gia nhit i lu phn ng gi c lm sch bng cc thit b

thi bi co rt c hnh trnh di vi mc co rt 10,6m. B hm nc c lm schbng cc thit b thi bi vi chiu su co rt 2,5 m. cc ch ngot ca ng gi dc

theo cc bc vch l c b qu nhit trn.

Dc theo ng khi ch ngot ca ng gi c cc thit b c lp nh sau:

B qu nhit i lu cao p II, kiu chuyn ng trc lu.

B qu nhit i lu cao p III, kiu chuyn ng trc lu.

B qu nhit i lu h p II, kiu chuyn ng dng ngc.

B qu nhit i lu h p I, kiu chuyn ng dng ngc.


16/37

Dng kh pha sau c chia ra lm hai dng khc nhau v i qua u ra ca

b sy khng kh kiu ng, b hm nc v tng th nht ca b sy khng kh kiu

ng.

Ti u ra ca b sy khng kh cc dng kh c kt hp vo ng khi ngang.Hai lung khi t ng gi ngang ny s cp kh cho lc bi tnh in. Cc van l

c lp t trn cc ng gi u ra v u vo ca lc bi. Sau , gi c kt

hp vo trong ng gi ngang v t y khi s c x theo cc ng ng gi v

qut ID. Ti u vo ca qut ID

mi ng gi c chia lm hai, cc van v cc np bt s c lp t cc ng gi

ny. Cnh dn hng s c lp trc tip vo qut ID. Cng sut ca qut ID c

iu khin bng cc khp ni thy lc cc trc gia motor, hp s v cnh dn

hng. Cc np bt sa cha v cc van c b tr theo dy trn cc ng gi u

ra ca qut ID. Sau cc lung khi c cp thng qua h thng FGD ra ng khi .

3.2. Chu trnh gi

Hnh 3.2 Chu trnh giGi lnh c hai qut FD ht t khng kh thng qua ng ht gi. Cc cnh

dn hng c lp trc tip phn ht gi, cc van c lp t u thi ca qut.


17/37

Lung gi sau qut c kt hp li ng gi ngang vi hai lung song song t mt

qut khc na. C s trch kh t ng gi ngang thng qua cc van n cc thit b

chuyn hng (4 ng), vic trch gi cho my nghin cng c chia lm 4 ng

vo 4 my nghin tung ng. T ng gi ngang ng gi chnh s c cp vo bsy khng kh v mi nhnh i qua mt tng ring bit ca b sy khng kh.

u ra ca b sy khng kh lung gi nng s c chia v pha l hi. Phn

gi nh hn s c cp qua van v thit b o n cc vi dn gi. Ti u vo ca l

hi gi s c chia v cp vo hai ng gp.

Mt phn ln gi c cp vo cc vi t thng qua thit b o, lung gi ny

c chia lm hai ng. ng gi th nht s c nhim v cp kh th cp vo hai

vi t bn di v cc phn trn nh ca vch trc l hi, ng gi th hai

cp kh cho cc vi t phn sau ca l hi. Trong cng cc ng gi s c cc phn

chn, hai ng chn cho qut gi s cp v mt cho ng gi nng n cc my

nghin. Mi qut gi s c nhim v cp gi cho 4 vi t, mt hng ca phn trc l

hoc sau l.

3.3.Chu trnh nhin liu

Hnh 3.3 Chu trnh nhin liu

L hi bao gm 4 h thng nghin than (khp kn, n) vi hai bunker cha

than mn. Than c sy v nghin than trong my nghin kiu 370/ 850, my nghin


18/37

than cha khong 82,9 tn bi thp. Hai h thng nghin cp than cho 1 bunker than

mn, vn hnh n nh cc my cp than mn th mc than mn trong bunker t nht

phi l 4 m.

mi u ra ca bunker c b tr 8 my cp than. mn ca than theo thitk l R905%. Nng sut ca my cp than mn c iu khin bng cch thay i

din tch ca c van iu khin cc mc t 1,8 n 8,5 (t/h), tng ng vi vic m

van t 20 n 100%. Phng tin vn chuyn than mn c m c cao l s dng

khng kh ngoi tri, khng kh ny c ht qua ng ht kh ca tuabin nn kh

ca l hi. H thng cp gi vn chuyn than vo h thng cp than mn c m

c cao gm hai tuabin nn kh kiu TB-80-1,8 mt chic vn hnh v mt chic d

phng. Cng sut ca tuabin nn kh l 8x103 3m /h, p sut l 7500 kpa, tiu th in

nng 150 kW, tc vng quay n 3000 vng/pht.

Cc ng gi t tuabin nn kh c kt hp vo mt ng gi loi 8325x vi

cc thit b o lu lng, p sut v nhit ca gi. Khng kh c phun t ng gi

ny vo mt h thng bao gm 6 ng gp c b tr bn di hai bunker than mn.

T mt trong cc ng gp kh c cp vo cc my cp than mn qua cc van tng

ng v cc thit b o lu lng n mi my cp than mn. T hai ng gp cn likhng kh c cp vo b phn trn gi vn chuyn than mn c m c cao

thng qua cc van v thit b o lu lng ln n thit b trn tip theo u ra ca

vi t vi lung gi nng s cp. phn trn cui cng than mn c m c cao

s c trn thm vi dng kh s b sau c lm nng ln v thng qua ng cp

than mn n s dn dn c nng hn, sau c cp vo phn xon ca vi t vi

nhit lc ny khong 300 C0

.

Trm bm du nhin liu l kiu trm bm truyn thng vi cc bm kiu trc

ti th nht v th hai cng vi cc b gia nhit v c cc b lc du nhin liu gia

chng. Du nhin liu c cp vo l hi t ng gp p sut chung ca cc bm kiu

trc ti th nht thng qua ng c ng knh Dn = 100mm, y phi c thit b o

lu lng du v chng phi c cc van cng vn hnh bng tay cch ly khi tin

hnh sa cha.


19/37

Cc van l vn hnh bng motor, cc np bt, cc thit b o lu lng du vo

l hi, cc van cch ly ng du nhin liu v cc van iu khin lu lng du vo

l hi s c lp t dc theo ng ng du nhin liu gn l hi. ng hi du

nhin liu t cc vi t ca l hi s c thc hin qua ng ng c ng knhDn = 50 mm, chng c lp t cc van v cc thit b o lu lng du. ng hi

du nhin liu s c a trc tip vo cc bn du nhin liu v vo cc bm ht

th hai.

Ngun hi c cp n cc b gia nhit, du nhin liu s c ly t ng gp

hi t dng ca t my vi cc thng s hi l p = 14 kgf/cm2

v t = 250 C0

3.4 H thng cp nc cho l hi

Hnh 3.4 H thng cp nc

Chc nng ca h thng

Cp nc vo bao hi ng thi cp nc vo h thng gim n iu chnh nhit

ca hi.


20/37

Bo Co Thc Tp Sn Xut B Mn T ng Ha

Chng 4: TUABIN CA NH MY NHIT IN UNG B

4.1.H thng Turnine.Theo s ca nh my 300MW, tuabin kiu K-300-170-1P s c lp t

phc v cho vic chuyn ng my pht in ACTBB-320-3T3. Tuabin c 3cylinders, kiu trc n v ngng t vi mt b gia nhit hi, cng sut danh nh l

303 MW v tc quay l 3000v/ph.

Cc thng s chnh ca tuabin cp in nng danh nh (khng trch hi

ti tun hon).

Lu lng hi chnh: 848,2 t/h

Nhit hi chnh: 538C0

p sut tuyt i: 171kgf/cm2

Cc thng s u ra ca xilanh cao p:

p sut tuyt i: 41 kgf/cm2

Nhit : 329,7C0

Cc thng s u vo ca xilanh cao p:

p sut tuyt i: 37,8 kgf/cm2

Nhit : 538 C0

p sut tuyt i bnh ngng: 0,065kgf/cm2

Hi chnh t l hi vi cc thng s c xc nh s c cp vo hai khi

van cao p. Mi khi bao gm 1 van chn v hai van iu khin. T cc khi van, hi

s c phn phi n phn trn v phn di ca xi lanh cao p thng qua 4 ng lin

thng cao p. Vic phn phi hi tuabin s do cc vi phun thc hin, cc thnh

phn ca vi phun c b tr cc hp cha vi phun nm trong phn thn bn trongca xilanh cao p.

Xilanh cao p gm hai phn, phn thn ngoi v phn thn trong. Lu lng

hi xilanh cao p l kiu dng ngc. ng hi ca xilanh cao p c tng iu

khin ch ng v 17 tng phn hi. T tng iu khin v 9 tng p sut c b

tr phn thn trong v to thnh dng hi bn tri ca xilanh cao p, 8 tng hi bn

phi c b tr phn thn ngoi ca xilanh cao p. Xilanh cao p khng c trch hi

ti tun hon.


21/37


Hnh 4.1 H thng iu khin TURBINE

Hi u ra ca xilanh cao p c cp n phn ti nhit ca l hi. Sau ti

nhit, hi c cp vo hai khi van trung p, mi khi van gm mt van chn v mt

van iu khin. Hi xilanh trung p c phn phi thng qua van tit lu. Cc vaniu khin xilanh trung p ch vn hnh bnh thng ca tuabin s c m hon

ton v khng tham gia vo vic iu chnh mc in nng. Xilanh trung p l kiu

xilanh trc lu, ng hi ca n c 15 tng ch ng. Xilanh trung p cng c 3

ng trch hi gia nhit nc ngng v nc cp l hi. Ti u ra ca xilanh

trung p, hi qua hai ng lin thng cp n phn gia ca xilanh h p. Xilanh h p

c ch to theo kiu xilanh hai dng, mi ng ng bao gm hai tng. Xilanh h

p c hai ng trch hi gia nhit nc ngng, ti u ra ca xilanh h p hi c

cp vo bnh ngng.

Tt c cc rotor ca tuabin c lm bng thp rn t loi thp hp kim chu

nhit, cc rotor cao v trung p c l khoan gia cn rotor h p c ch to m

khng c l khoan gia.

Tt c cc khp ni ca tuabin c lm theo kiu khp ni cng, na khp ni

c rn cng vi trc.


22/37


Cc giong cui ca Tuabin v cc giong gia ca xilanh cao p, xilanh trung

v h p c lm theo kiu giong hi labirinth. Ti xilanh cao v trung p c s

dng loi giong labirinth thoi.

Mi rotor ca tuabin c trn hai , cc phn chn ca trc cgia cng ch to nh l cc ming chn ( c 6 ming chn). Cc thn ca

Tuabin c t trn v gn c nh vo cc khung mng. Phn x ca xilanh h p

cng c t trn cc khung mng. Trn thn ca tt c cc Tuabin c cc im

neo ring.

Cc phn dn n do nhit c thc hin theo cch l gia nhit phn thn

ca xilanh cao p y theo hng ca trc v cc phn ca xilanh trung v h

p.

Phn thn ca c neo vo cc im neo ca rotor. Tuabin cn c cp

km vi hp s, n c lp v hp s s 4 v h thng thy lc nng rtor. Hp s

ny c cp quay trc bng tay v vn hnh h thng thy lc nng rotor. Ti

tuabin cn c cp cc bch xilanh cao p v trung p. Hi gia nhit c cp t

ng ng ti nhit nng.


23/37


4.2. Bnh ngng

Hnh 4.2 H thng bnh ngng

Theo s ca h thng Tuabin c mt bnh ngng kiu 300K -18200 - 4.

Bnh ngng l kiu hai dng lp n pha trc v l loi ph hp vi vic vn hnh

bng nc bin. Din tch b mt lm mt ca bnh ngng l 17900m 2 v c to

thnh bi cc ng titanium vi chiu di l 14000m v ng knh ngoi l 19,05mm.

Bnh ngng l thit b chn khng, p sut thit k bn trong lp v kh s c

duy tr da vo dng hi cp n bnh ngng, nhit v lu lng nc lm mt i

qua cc ng cng nh cc iu kin vn hnh v cc thit b ca h thng tuabin: H

thng lm sch ng bnh ngng, h thng chn khng kn kh v cc thit b x kh

bnh ngng.


24/37


V bnh ngng c gia cng ch to v hn t cc tm thp cacbon, pha tip

xc vi nc ca cc gin ng c ph mt lp titanium. Cc ng bnh ngng c

kt hp thnh cc dn ng ln bng cch hn cc u ng vo cc bng titanium.

Nhnh ni ca bnh ngng c hn vo cc u vi x ca xilanh h p catuabin. gii quyt vic dn n do nhit v bnh ngng c lp t trn cc gi cn

bng, chng c thit k t cn bng ti trng ca bnh ngng khi khng c nc.

Nc a vo bnh ngng trong qu trnh vn hnh Tuabin s c thng qua cc

phn x ca xilanh h p v ti trng ca lng nc ny c chuyn n khung

mng ca xilanh h p.

Nc lm mt s i qua bnh ngng bng hai ng. mi ng trc tin n

s cp nc vo khoang nc c p ca bnh ngng, i qua cc ng vo khoang x

nc ca bnh ngng v t s c a vo ng x. Vic ny cng to iu kin

cho php dng v lm v sinh bt c dn ng no trong khi ang vn hnh Tuabin.

Ti phn bn trn ca bnh ngng c b tr cc thit b nhn hi nhn hi t

ng r nhnh h p. Hi ny s c lm mt bng vic phun nc ngng vo cc

thit b nhn hi thng qua cc bm nc ngng v cc tuyn ng. Bnh ngng cng l

mt b phn nhn hi v nc to s vn hnh bnh thng cho h thng Tuabin

thi im khi ng t my, ngng t my v vn hnh t my.

4.3 Cc bnh gia nhit h p

phc v cho vic gia nhit ti tun hon cho nc ngng chnh ca Tuabin th

trong s ca h thng c ba bnh gia nhit h p. Tt c cc bnh gia nhit h p u

c kiu nm ngang.


25/37


Hnh 4.3 Gia nhit h p

Cc c tnh vn hnh ca bnh gia nhit :

Bnh gia nhit h p s 1 :

Kiu15,203400 H

B mt trao trao i nhit 400m2

p sut thit k nc ngng 25 kgf/cm2

p sut thit k hi 3,0 kgf/cm2


Kiu 15,206500 H

B mt trao i nhit 500m

2

p sut thit k nc ngng 25kgf/cm2

p sut thit k hi 6,0 kgf/cm2


Kiu 15,206600 H

B mt trao i nhit 600m2

p sut thit k nc ngng v p sut thit k hi tng t bnh gia nhit h p s 2


26/37


Cc thnh phn c bn ca bnh gia nhit l v bnh v h thng ng. V bnh c

ch to t thp Cacbon v h thng ng c lm bng thp khng r.

B mt trao i nhit ca bnh gia nhit trng ging nh cc b ng n c to bi

cc ng hnh ch U ng knh Dn = 16mm vi chiu dy ca thnh ng l 0,8 mm.Cc ng c gn vo cc tm thp v nghing v pha vch ngn trung gian. Vic s

dng cc ng hnh ch U to iu kin m rng tng i din tch trao i nhit.

Bnh gia nhit h p s 2 v s 3 c cc bnh ngng hi gia nhit t xa kiu nm

ngang. Th tch ca bnh nc ngng ca bnh gia nhit s 3 khong 13m v bnh gia

nhit h p s 2 l 5,53m .

Hi gia nhit cho bnh gia nhit h p c trch t hi ca Tuabin. Hi c psut tuyt i 0,26 kgf/

2cm v m l 5% s c cp vo bnh gia nhit s 1. Hi

c cp vo bnh gia nhit s 2 c p sut 1 kgf/2cm v nhit 100 C

0v hi c

cp vo bnh gia nhit s 3 c p sut 4,3 kgf/2cm v nhit 243 C

0.

4.4 Cc bnh gia nhit cao p

Hnh 4.4 Gia nhit cao p


27/37


Hai bnh gia nhit cao p s c lp t theo s ti tun hon cao p (bnh

gia nhit cao p s 5 v s 6). Bnh gia nhit s 5 c b kh qu nhit t xa. Bnh gia

nhit cao p l kiu B-2-100-24-2,0 T3 v b kh qu nhit hi kiu O-2-

200-24-2,0 T3 l cc thit b kiu khoang nm ngang c gia cng bng phng phphn. Mi thit b c mt khoang nc v cc v b tr ngang c ni vo khoang ny.

Nc cp cp vo phn di ca bnh gia nhit v hi gia nhit c cp vo phn

trn ca bnh gia nhit. Cc b phn c bn ca cc bnh gia nhit l v v h thng

ng. B mt trao i nhit l cc on ng hnh ch U c gia cng ch to t cc

ng c ng knh Dn = 16mm v chiu dy thnh ng l 1,4 2mm. Vt liu ch to

ng l thp khng g, thp Austenit.

Tt c cc b kh qu nhit ca bnh gia nhit cao p s 5 v s 6 u c thit

k c th ngng hot ng v c cc thit b bo v kch hot nhanh, mc ch l

ngng h thng v r nhnh ng nc cp trong trng hp mc nc ngng tng

ln mt cch khn cp mt trong cc bnh gia nhit cao p. Hi gia nhit ca bnh

gia nhit cao p c ly t ng hi trch ca Tuabin.

Hi vo bnh gia nhit cao p s 6 c cp t cc ng ti nhit lnh vi cc

thng s nh sau :

p sut tuyt i 40,8kgf/cm2

Nhit 328,2C0

Hi vo bnh gia nhit cao p s 5 c trch t ng trch s 2 ca Tuabin vi

cc thng s nh sau :

p sut tuyt i 17,8 kgf/cm2

Nhit 426,5C0

Kh ngng t v khng ngng t ca phn hi gia nhit trong bnh gia nhit h

p c x t thn v bnh s c thc hin theo s cng ngh c chp nhn.

bo v bnh gia nhit cao p s 5 khng b tng p n mc qu cao s c cc van

an ton c lp m bo an ton.


28/37


Chng 5: GII THIU V H THNG IU KHIN DCS

CA NH MY NHIT IN UNG B

Cc qu trnh cng ngh trong nh my c iu khin bi h thng iu khin phn

tn DCS (gm l hi v cc thit b ph nh bm cp, my nghin...), h thng iu

khin PLC (gm h thng x l nc, nc thi, than, lc bi, kh lu hunh...) v h

thng iu khin MarkV iu khin Tuabin, my pht. Tt c cc h thng ny u

c ni vi h thng DCS qua cc ng truyn d liu tc cao, to thnh 1 mng

iu khin phn cp. Ngi vn hnh s vn hnh nh my thng qua cc giao din

vn hnh Ngi - My (HIS) ca h thng DCS t ti phng iu khin trung tm,hoc thng qua cc mn hnh my tnh PC hay Panel iu khin ti ch.

H thng iu khin DCS dy chuyn 2 nh my in Ung B l h thng iu khin

DCS: iu khin t my ca ABB: Symphony harmony sn xut Singapore

5.1 Gii thiu phn cng ca DCS nhit in Ung B

5.1.1.Gii thiu chung v AC 800M

AC 800M c th c hiu nh mt cu trc phn cng m cc n v phn cng

(hardware units) ring l c ni vi nhau ph thuc vo cu trc ca cc unit v hiu hnh c chn c th lp trnh thc hin nhiu chc nng khc nhau. Mt khi

cu trc phn cng c xc nh th n tr thnh mt AC 800M Controller.

- Cc Processor unit (PM851/PM856/PM860/PM861/PM864/PM865).

- Bxlchnhxccao(HighIntegrityProcessorunit)(PM865/SM801).

- Cc giao tip truyn thng cho cc phng thc khc nhau

(CI851/CI852/CI853/CI854/CI854A/CI855/CI856/CI857/CI858/CI80)

- n v kt ni CEX-Bus (BC810).

- Cc n v cung cp cc mc nng lng khc nhau.

(SD821/SD822/SD823/SS822/SS823).

- Ngun d phng (SB821).

Mt khi c thm phn mm iu khin (Control Software) th AC 800M Controller s

hot ng hoc nh mt b chu trnh iu khin ng mt mnh, hoc nh mt

Controller thc hin nhng nhim v iu khin ti mt mng iu hnh bao gmnhiu Controller ni vi nhau, cc trm vn hnh (Operator Station) v cc Server.


29/37


Cc h thng vo/ra c th c ni vi AC 800M Controller, trc tip vi (S800I/O)

hoc qua PROFIBUS DP hoc bus trng FOUNDATION Fieldbus. AC 800M

Controller th c cp pht khng c Control Software. to ra Controller v

Control Software th trc ht cn thit phi ti phn sn (Filmware) v to ra nhngng dng c bit lm cng c thit k Control Builder M. AC 800M Controller l s

t hp nhiu phn t (unit) c gn trn cc thanh ray nm ngang (DIN-rail).

B iu khin AC 800M c thit k to ra nhng ng dng mang li hiu qu

cao, bo dng thun li cho nhng gii php ng dng t cc b iu khin kh trnh

(PLC) c nh n nhng ng dng iu khin phn tn DCS (Distributed Control

System), t hp cc iu khin phn tn DCS v nhng ng dng iu khin cc h

thng c tnh ton vn cao (High Integrity

Hnh 5.1 V d v mt AC 800M Controller v mt n v S800 I/O


30/37


Hnh 5.2 Cu to bn ngoi ca mt n v b x l (PM861)

H thng DCS c phn thnh 4 cp:

- Cp qun l, gim st

- Cp giao din vn hnh

- Cp iu khin

- Cp chp hnh

Cp qun l gim st:

Gim st ton b qu trnh hot ng ca nh my, gm:

- SUPERVISORS PC : Gim st chung.

- HISTORIAN : L cc my tnh c dung lng ln dng lu tr cc thng

tin vn hnh ca nh my, s dng phn mm qun l d liu PI (Plant Information).

Cc HISTORIAN ly thng tin t cc FCS thng qua cc OPC SERVER, t b ghi

tun t SOE.

- OPC SERVER l cc my tnh qun l truyn d liu qua cc giao thc mng

khc nhau, t FCS qua VNET n OPC SERVER ri qua mng ETHERNET v a

n HISTORIAN. mi phn c 2 my OPC SERVER , mt cho thu nhp tn hiu

tng t , mt cho tn hiu s.


31/37


- EWS (Engineering WorkStation): Trm thc hin cc cng vic k thut nh :

+ Phn quyn cho cc trm giao din.

+ Lp v sa i chng trnh cho cc trm iu khin khu vc.

+ Backup/RestoreCp giao din vn hnh (HIS):

- Gm 10 trm giao din HIS kiu mn hnh kp cho khi 1 v khi 2 mi khi 5 trm

- Phn chung c 2 trm giao din.

Giao din HIS thc cht l cc my tnh vi bn phm c thit k ring cho vic

iu khin nh my. Cc my tnh ny chy trn h iu hnh WindowsNT trn c

ci t phn mm iu khin CENTUM CS3000. Trn mn hnh vn hnh s cung cp

tt c cc s cng ngh, thng s vn hnh, ca s iu khin, cc im t, th,

bo ng...

Cp iu khin:

Thc hin iu khin cc qu trnh ca nh my, mi khi c 12 trm iu khin

LFCS v 2 trm PFCS.

Phn chung c 3 trm iu khin kiu LFCS v 6 trm PFCS.

Vic x l tnh ton ca h thng DCS c thc hin thng qua cc FCS. Trn FCS

c cc khi vi x l, khi thng tin lin lc, khi ngun v cc khi vo/ra. Tn hiu

lin lc gia b vi x l v cc khi vo/ra c thc hin thng qua ng truyn d

liu RIO BUS c tc truyn tin l 1Mb/s.

Cp chp hnh:

Bao gm ton b cc thit b ca hai khi v cc h thng iu khin khc nh:

- H thng iu khin Mark V.

- Cc trm iu khin PLC- Cc trm iu khin ti ch

- Cc c cu chp hnh khc.

H thng DCS gm c 2 mng :

- Mng Ethernet

- Mng Vnet

Mng Ethernet :


32/37


H thng mng Ethernet dng kt ni thng tin gia cc thit b ca cp gim st v

cp giao din vn hnh s dng giao thc truyn tin TCP/IP. Cc h thng iu khin

PLC cng c ni vi h thng DCS thng qua mng Ether net s dng cp ng

trc hoc cp quang.Mng Vnet :

Mng Vnet s dng kt ni gia cc trm iu khin FCS vi nhau v gia cc FCS

vi cc giao din HIS. Mng ny s dng giao thc truyn tin Token passing vi thi

gian truyn tin l 100m/s v tc truyn tin l 10Mb/s.

Cc phn t ca h thng :

- SOE (Sequence of Event): L h thng thu thp s liu trnh t ca cc s kin, sau

c gi v h thng PI c 1 ms qut mt ln. Mi khi c 1 b ghi tun t.

- YNT511D-V l cc b khuych i tn hiu dng cp quang, c s dng truyn

thng tin i xa. Vic s dng b lp ny c th truyn thng tin qua cp quang vi

khong cch ln. Vi b YNT511D-V th khong cch ln nht c th truyn l 4Km.

- Dual RS422/485 Modbus l h thng lin lc ni tip d phng kp thng qua cng

RS422/485 gia h thng DCS vi cc h thng iu khin ph tr khc nh Mark V,

PLC.

- HUB hoc System HUB ghp ni mng Ethernet theo kiu hnh sao.

H thng iu khin DCS c trang b vi tin cy cao bi h thng d phng kp

cho tt c cc b phn x l, thng tin lin lc, ngun cung cp.

- Master Clock l ng h thi gian chun ly tn hiu t v tinh t thi gian chun

cho h thng iu khin.

Ti phng iu khin trung tm ngi vn hnh c th la chn ch iu khin

AUT hoc MAN. Vi bt k ch iu khin no th mi thng s v tnh trng hinthi ca thit b u c th truy cp t c 2 ni: Giao din vn hnh HIS ti phng iu

khin trung tm v giao din vn hnh ti ch.

5.2 Phn mm iu khin- control software

Phn mm s dng trong AC 800M Controller c tn l Control Software. Tn

ny khng c dng thay th cho mt b phn mm ng dng c bit l mt tn

chung cho phm vi ca nhng chc nng c dng trong b iu khin. Cc chc

nng ny th c cung cp bi:


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cc thit b ph ,iu khin phi hp l hi tua bin ,bo v l hi tua bin my pht

iu khin v gim st cc h thng ph tr thuc phn cn bng nh my

Cu trc ca h thng iu khin v gim st tch hp bao gm cc trm iu khin

c b tr phn tn da trn c s cc b iu khin loi vi x l do hng ABB cpv cc h thng iu khin c lp v s dng b iu khin logic kh trnh

H thng iu khin gim st (ICMS-intergrated control monitoring system) h

thng ny bao gm

+ h thng iu khin gim st khi t my c gi l (UCMS- unit control

monitoring system)

+ h thng iu khin gim st phn chung ca nh my c gi l (SCMS-

station control monitor system)

Cc h thng hot ng c lp vi khi t my c iu khin v gim st c lp

hon ton t cc t iu khin c lp s dng b iu khin logic kh trnh PLC c

th nh sau h thng x l nc v kh khong v x l nc thi ,h thngs cp

than ,h thng x l tro x ,h thng x l hidro trm kh nn ,h thng thi bi l .

Ton b vic iu khin v gim st qu trnh vn hnh nh my c thc hin t

phng iu khin chnh t ti nh iu khin trung tm .Trong phng iu khin

chnh ny c b tr cc thit b chnh sau :

+ 5 trm lm vic vn hnh vi mn hnh i iu khin v gim st cc h

thng thit b thuc khi t my

+ 2 trm lm vic vn hnh vi mn hnh i iu khin v gim st qu trnh

vn hnh cc h thng thuc phn chung ca nh my dng thit b chnh khi h

thng iu khin h thng

+ h thng truyn hnh mch kn theo di ngn la bung t v qu trnh vnhnh cc h thng

Cc bng iu khin ph :ngoi ra ti mt s nh my c b tr mt trm lm vic

vn hnh vi mn hnh n t ti phng iu khin ti ch vic iu khin v gim

st qu trnh vn hnh ca h thng cng ngh ny c thc hin t mn hnh MMI

ca cc trm vn hnh ,chi tit c th nh sau :

stt Tn h thng S lng trm lm vic

1 H thng x l nc ,kh 4 trm (2 mn hnh n )


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khong ,x l nc thi2 H thng cp than 3 trm (3 mn hnh n )3 H thng d than ng st 2 trm (2 mn hnh n)4 H thng kh lu hunh v

kh bi tnh in

2 trm (2 mn hnh n)

5

6

H thng x l tro x

H thng sn xut hidro

2 trm (hai mn hnh n)

2 trm (hai mn hnh n)

Hnh 5.4 Gim st tng quan ca nh my


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Hnh 5.5 H thng ch bin than

Hnh 5.6 H thng du nhin liu


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Hnh 5.7 H thng gi

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