CHNG TRNH U-1100

CC NI DUNG CHNH:I/ KHI QUT CHUNG

II/ THUYT MINH DY CHUYNIII/ KHNG CH CNG NGH

IV/ QUY TRNH THAO TCV/ AN TON CNG VI/KHI QUT CHUNG:

H thng nghin sy kh than (CMD) bao gm 3 dy chuyn cng ngh ca 3 h thng cung cp cho hai h thng nn p v cung cp than. Trong qu trnh hot ng bnh thng c hai h thng hot ng v mt h thng d phng.

Trong m t cng ngh ny ch c h thng nghin A ca U1100 c m t.

M hnh h thng CMD c la chn p ng hai yu cu chnh:

vn hnh an ton v lu kho than bt nghin vi mt bu khng kh tr.

Gim thiu nng lng tiu thu, ngha l s dng tun hon kh vn chuyn v sy gim lng tn tht qu mc kh t.

Kho than bt kh i hi la chn mt h thng kho phu np liu cung cp than cho b kh ho ngoi ra n cng tng cng kh nng sn sng cung cp than.

Than v bt vi c lu gi mt cch ring bit trong cc bunker cha. Bunker than c cng sut nghin 8h sn xut. Bunker vi c cng sut 150 m3.

Trong my nghin (A-1101A) than nguyn liu c nghin v sy kh di p sut thp trong iu kin tr.

Nhit cho sy c cung cp bi kh t nng t thit b pht sinh kh tr F-1101A.

Cc kh cng ngh v than nghin c tch ra trong b lc bng vi phng lc than bt S-1103A. Nng cht rn trong kh sch l di 20mg/Nm3. Hu ht cc kh sch c ti ch duy tr bu khng kh tr.

Than bt c vn chuyn qua mt h thng vn chuyn v phn phi t cc phng lc than bt ti b phn nn p v cung cp than U1200.

II/ THUYT MINH DY CHUYN

1) S b tr h thng:

2) Thuyt minh dy chuyn:

Than bt c lu tr trong cc bunker than V- 1101A.

Bt vi c lu tr trong bunker vi V- 1102.

Than c nh lng theo trng lng t bunker bng thit b cung cp trng lng X-1101 v my nghin than. Bt vi c cung cp t nh my in vo bunker vi V-1102 v sau vn chuyn bng vt ti X-1106 A v cung cp kiu quay X-1107A vo thng ng lng V-1103A. T vi c ng lng t l trng lng vi dng chy than thng qua vt ti cung cp X-1106A, tip n cung cp kiu quay X-1107A v thit b lm ti X-1108A vo cc my nghin.

Than cung cp c gi lin tc di dng nit sch. Bunker than c thng vi qut K-1104A qua b lc S-1101A.

Khi lu tr lu di, cc ca ra ca b lc than cn c theo di thng xuyn nng CO hm lng s bo hiu vic than chy m . Cc bunker than c trang b mt vng phn phi nit dp tt cc m chy than.

Than v vi sau khi vo my nghin c nghin v sy kh bng dng kh nng tr. Lung kh tr vo my nghin c nhit ti a l 300oC v ra vi nhit ti a l 120oC.

Dng kh tr vn chuyn than nghin n thit b phn loi kiu quay S-1102A , m t cc ht th c quay li my nghin. Dng kh tr ti cc ht mn n phng lc ti than bt S-1103A. Hm lng than bt ca dng ny l khong 400g/m3.

ngn chn than bt bt kn trc v vng bi th ta lp qut bt kn bng nit nng thp p..Than bt v kh tr c phn tch nhau trong phng lc ti. Hiu sut lc c khng ch bng cch gim p sut trong ti lc. Ti ca ra ca ti lc my phn tch CO c lp pht hin than chy m , cc phng ti lc s c kim tra trnh ngng t. Kh tr c cha t hn 20mg/Nm3 c tun hon nh qut tun hon K-1102A.

Than bt thu gom c tho ra nh b cp kiu quay X-1102A, sng quay X-1103A/B v vt x X-1109, X-1110A, X-1111A.

III/ KHNG CH CNG NGH1.Cc yu t cng ngh cn khng ch bao gm c:

Kch thc than sau khi nghin m than

Vng tun hon kh tr p sut h thnga).Kch thc than sau khi nghin:

Yu cu c ht: 90 % Khi lng < 90 micron

Nhiu nht 10 KL% < 10 micron Nu c ht qu b th to nhiu tro bay

Nu c ht qu ln th kh khn cho vn chuyn

C ht than cng ph thuc vo hot tnh ca than b). m than:

- m than < 2% khi lngc).Vng tun hon kh tr:

- Vng tun hon kh tr c mc ch gi nng xy v hm m thch hp.

- m kh tr trong vng tun hon thng thay i < 30 % th tch- Nng xy < 8 %

d). p sut h thng:

p sut h thng c duy tr bi s kim sot p lc ti ca ra ca my nghin.

2. iu khin cng ngh:

a) iu khin c ht than da vo:

- Tc phn loi kiu quay:

+ iu khin chnh

+ Ph thuc vo than

+ Do ngi vn hnh ci t- p lc mm nghin: l mt gi tr c nh do ngi vn hnh ci t.

- Vn tc kh tr:

+ iu chnh bng ca vo cnh qut ca qut tun hon

+ Tc v lu lng nh truc da theo ph ti

b) iu khin m than da vo:

* iu chnh nhit ca ra my nghin:

- iu chnh lu lng kh tr vo my nghin

- T l khng kh v lu lng cht tKhi nhit ca ra my nghin cao ( TC-H ) s tc ng n van iu van iu khin lu lng ( FV ) gim t l khng kh v lu lng cht t. Khi thp th ngc li

c) Vng tun hon kh tr: Kh tr tun hon li khong 80 %

m kh tr trong vng tun hon:

Khi hm m trong vng kh tun hon cao ( QR-H, H2O) n s tc ng n van iu chnh lu lng khng kh pha long ca ra ca qut K-1105A

Nng xy trong vng tun hon kh tr: Thng thay i tu thuc vo tng loi than, nu qu cao ( QR-H,O2 ) s tc ng n van ( FC ) b xung lng nit thp p vo.

d) p sut ca h thng ( ca ra my nghin): Khng ch p sut c nh, khi p sut ca ra my nghin cao (PC-H) s iu chnh m van phng khng.

e) iu khin tc cp than v vi: Da vo tc bng ti cung cp, tc do ngi vn hnh ci t, tc cp vi ph thuc vo lu lng than.

IV/ QUY TRNH THAO TC1) KHI NG:

a) chun b khi ng v khi ng cc h thng ph tr: Kim tra mc than bt trong bunker U1200, bunker than nghin, bunker vi. M tt c cc van cch ly. Lm sch bng nit cho cc thit b v trang thit b Lm sch bng nit cho h thng lm sch b lc. M van nc lm mt cho cc thit b, h thng du bi trn.b) Chun b tr ho v gia nhit: Bt qut tun hon lu lng kh ti thiu.

Kim tra nng xy

Sy nng h thng, nu cn thit khi ng u t ca thit b pht sinh kh tr h tr sy phng lc ti.

Bt thu lc/h thng kh nn cho cc trc nghin.

Bt cc h thng du bi trn

Khi ng b phn loi kiu quay v iu chnh tc thit lp cho s phn b kch c ht theo yu cu.

Bt cng tc vt x v vt ti cng nh b cp kiu quay.

Cho lp liu u tin vo bn nghin.

c) Khi ng my nghin v cung cp than:

Khi ng qut bt kn Khi ng u t chnh thit b pht sinh kh tr Khi ng bn nghin Khi ng thit b cp than v vi xc nh trng lng tc cp nh nht Chuyn i khng ch nhit nghin t gia nhit n sy Khi ng qut pha long Tng dn tc cung cp than n cng sut mong mun Khi ng a khng kh tun hon vo.2) DNG MYa) Ngng my thng thng:

Cc th tc tt my v c bn theo th t o ngc ca trnh t khi ng:

ng van ca ra ca bunker.

Thng qua vic iu chnh thi gian, u tin my cp liu v h thng cp vi c dng Thit b pht sinh kh tr ngng hot ng hoc dng do nhitt qu cao ti ca ra ca my nghin.

Sau mt thi gian cc a nghin c ngng li Thit b phn loi kiu quay, qut pha long khng kh v qut bt kn dng li; nit bt kn c cung cp cho n khi h thng ngui hon ton Qut tun hon v h thng lm sch phng lc ti than bt c duy tr hot ng t nht 20 pht. H thng lm sch phng lc ti c chuyn t kim sot gim p sang kim sot thi gian lm mt.

Trong khi lm mt hn lng O2 v im sng vn phi kim sot v nu cn thit nit s c b xung thm.

Sau khi hon thnh lm ngui hu ht h thng ph tr tt.

b) Ngng my khn cp:

T ng ngng my khn cp khi cc qut tun hon khng p ng iu kin cng ngh T ng ngng my khn cp khi hm lng xy > 11 %

T dng ngng my khn cp khi hm lng CO sau phng lc ti > 0,05 % hoc trong bunker than bt > 0,1 %

3) VN HNH BNH THNG

Khi vn hnh bnh thng h thng nghin sy than c kim sot nh m t sau:

a) H thng nghin sy than:

Cc bunker c t trn mc (LS-H/L cho cc bunker than, WA-H/L cho cc bunker vi. Mc bunker c th dao ng gia mt ga tr ti thiu v ti a. Mc ti thiu l cn thit m bo bt kn kh i vi my nghin. mc ti a vic cung cp than nghin c ngng li.

Vic cp than cho my nghin c iu khin bi tc ca thit b cp than trng lng ( FC ) v cp vi theo t l khng ch. Ngi vn hnh chn tc cp than v t l ( vi/ than).

Cc mc nguyn liu c lu gi 1 % t mc t trong vng 40 % n 100 % ph ti.

Kch c ca than bt c kim sot bi lu lng kh tr tun hon, p lc ca con ln trn bn nghin v tc quay ca thit b phn loi kiu quay.

Bnh thng 2 thng s u tin l hu nh khng i v kch thc c ht c iu khin bi s kim sot tc phn loi kiu quay.

Nhit ca ra ca my nghin iu khin my to kh tr. Mch kim sot gi nhit ca ra lin tc n nh.

Vc kim sot chnh xc nhit ca ra my nghin m bo kim sot chnh xc m.

b) H thng kh tr:

Kh nhin liu v lu lng kh t chy c kim sot v t l bi b iu khin lu lng ( FC) trong ng cung cp. Lu lng khng kh t chy cao hn 10 % so vi t l cn thit m bo t chy hon ton. Lu lng kh nhin liu c iu khin thng qua kim sot nhit ca ra my nghin. Lu lng kh tr ra khi my nghin c iu khin bi b iu khin lu lng ( FC ) ca qut tun hon. Tc lng kh iu chnh trn c s dng than a vo.

Vic kim sot p lc ( PC ) gi n nh p sut ca h thng. Cc cm bin ca mch ny c t ti ca ra ca my nghin v iu khin van x kh tr ra mi trng. Nu p sut thp nit thp p c cung cp vo h thng. Lc p sut qu cao bo ng c kch hot v cui cng ngng my h thng.

Hm lng xy c theo di pha sau phng lc ti ( QR, O2 ) v sau my pht sinh kh tr, nu mt trong hai v tr a ra mt gi tr cao nit s c b xung vo.

Cc im sng ca kh tr c gim st sau phng lc ti ( QR, H2O). Nu cn thit khng kh pha long c thm vo gi im sng trong khong mong mun.c) H thng lc than bt:

Hai h thng bo ng nhit cao ( TA-H ) v bo mc cao ( LA-H ) bo v phng lc ti chng li iu kin hot ng qu ti.

Van gim p bo v phng lc ti chng li vt p qu cao.

B iu khin chnh p ( PdC ) pha trn ti lc tc ng xung kh lm sch h thng. Nhng nguy him cho phng lc ti c bo hiu bng my phn tch bi ( QA-H,bi). Phn tch CO ( QA-H, CO ) cnh bo vic than chy m .

4) CC S C C TH XY RA

Khu vc nghin sy than b dng c th do nhiu nguyn nhn, quan trng nht l cc nguyn nhn i hi phi i vo h thng kim tra sa cha: Cc h thng cung cp b trc trc: Tu theo tng trng hp m c cc bin php s l ph hp.

Ti lc b r r: pht hin hin tng ny ngi ta lp cc thit b phn tch bi ca ra ti lc. Cn kim tra thng xuyn tnh trng cc van thi ngc, tu tnh hnh thc t m s l cho ph hp. Chy than: c th xy ra trong khu vc lu tr than cc khng c silo (ngoi phm vi sn xut B.L). C th trnh c iu ny bng cch gim st nhit than (khong 50-75 cm di b mt) v kp thi ti than v ti nn. Trong trng hp m chy xut hin, cn trin khai k thut chng chy tiu chun. Than ang chy m khng cho php vn chuyn n bunke trong h thng nghin sy than. Cn lp t van gim p chng li trng hp rt him khi xy ra l qu p do nit, do tc nghn mt trong nhng ng ng chnh. Vn hnh khng an ton khi hm lng xy cao: Nghin sy than c thc hin trong mi trng kh tr, nng oxy c lin tc gim st v t ng ngng my nghin v h thng kh tr nu O2 vt qu mc ti a cho php. Hin tng tnh in: Cc my nghin cn c ni t trnh hin tng tnh inV/ AN TON CNG V1) Nhng bin php an ton quy nh hot ng ca xng:

m bo hot ng xng an ton, cn thc hin cc thao tc sau y:

Chun b cc quy trnh vn hnh v bo tr chi tit v r rng .

Chun b cc quy nh r rng v trng hp khn cp (bao gm c cc h thng/ hng dn thng tin lin lc ra bn ngoi v ni b; trch nhim, quy trnh cha chy, vv).

o to m rng tt c cc quy trnh cho ngi vn hnh.

Thnh lp mt t chc phn ng nhanh cho xng.

Thnh lp mt i cu ho ca xng ( c cc thao tc chng chy ban u) v o to ca tt c cc nhn vin vn hnh nguyn tc cha chy u tin.

o to nh k cho tt c cc nhn vin v cc quy trnh khn cp.

Khi ng ban u ton xng di s gim st ca cc chuyn gia.

Thu kim nh vin bn ngoi nh gi an ton nh k.

2) Cc bin php gim thiu ri do v gim thiu nh hng ca s kin bt thng:

a) Qu p thit b

Khng th loi tr hon ton tnh hung ny. Bin php phng chng u tin l c mt thit k hp l. Bin php phng chng th hai l lp t h thng cnh bo p sut v (nu khng c hnh ng c thc hin) l cng tc ngng my p sut. Hng phng th cui cng l lp t h thng gim p c kh (trn thng thch hp / ng ng hoc trn cc h thng cung cp ca chng). Vn cng c th xy ra do thit b hot ng nhit cao qu v hay n mn (cc b). Thit b vn hnh nhit qu cao c x l bng cc cnh bo nhit v cng tc ngng my sau cng . Cn nh k kim tra, v ghi kt qu kim tra xem xt, d on tui th ca thit b, vv, nu c th, trong qu trnh vn hnh hoc trong thi gian kim tra/ bo dng theo lch trnh nhm gim thiu nguy c xy ra li thit b do b n mn (cc b) . (Lu : ngoi ra, iu ny thng khng dn n hng ton b thit b).

b) N bi

Cc khu vc c th xy ra hin tng n bi l cc khu vc lu tr than. gim thiu nguy c n bi, bn cnh mt thit k hp l (bao gm c cc thit b x p trn silo lu tr ), cn c cc bin php sau y :

1) X l than bt "nng" (trn 60 C) trong mi trng kh nit.

2) Phun than khng c lu gi trong silo ngn khng cho n tr thnh "bi".

3 Gi gn v sinh nhng ni c x l than ( xut lp t mt h thng lm sch chn khng trung tm, tip t ng cch v c bo v) .

Nu tun th cc hng dn trn, cc v n bi s khng xy ra.

c) Chy lin hon cht lng v cc cht khc

Thnh phn duy nht s dng trong xng c th gy ra mt m chy lin hon l kh nhin liu, c s dng trong thit b to kh tr.

Cc thnh phn khc c th chm ngi / duy tr s chy l:

Kh tng hp

Than Kh nhin liu.

xy c th gy ra ha hon, thm ch mt v n trong "thng" , bn trong ng ng / thit b ca n nu khng c thit k ng v / hoc lm sch ng (ban u hoc sau khi bo tr), hoc do li thit b cu thnh h thng. Hn na, oxy cn thc y chy mnh hn. Cn thc hin ng cc quy trnh bo tr ngn chn iu ny. Ngoi ra, cc thit b c nguy c li c hc cao cn c bo v bi tng la.

Trong trng hp chy do oxy chm ngi, qu trnh chy s kt thc sau vi giy (chp chy), v ch gy ra thit hi cho mi trng ln cn.d) H thng cnh bo v thng bo chy:

Cn lp t h thng thng bo cnh bo chy gm c mt bng iu khin v ch bo, mt s hp cnh bo chy v mng cp kt ni.

Bng iu khin v ch bo cn th hin cc tn hiu cnh bo c v trc quan v m thanh trn cc cnh bo n. Bng iu khin v ch bo cn c lp t trong phng iu khin.

Bng iu khin cng gip gim st lp t ton b cc cnh bo b sung khc nhau cho cc iu kin lm vic khng ng nh: gin on ng dy dn, dy dn cch in khng thp, in p cung cp thp, vv.

Cn trang b thm cc thit b kim tra mch. Bng iu khin cn c cung cp in ngun xoay chiu (A.C) v trang b pin d phng cho 5 gi hot ng bnh thng.

Cc hp cnh bo chy cn l kiu bng tay bao gm mt nt bm hot ng t ng khi lp knh bo v ca n b v. Chng phi chu c thay i thi tit v / hoc chng n theo phn loi khu vc. Hp bo chy cn c lp t ti cc im trng yu trong cc khu vc cng ngh. mt s khu vc cn lp t cc h thng t ng pht hin v / hoc h thng cha chy t ng (v d nh: cc bng ti than), c thng bo khi h thng c kch hot.