shigang steel - company case study (vietnamese)

CNG TY TNHH ST & THP SHIJIAZHUANG: Nghin cu cng ty in hnh

CNG TY TNHH ST & THP SHIJIAZHUANG

M T CNGTY

Cng ty TNHH st & thp Shijiazhuang (di y gi l Shigang) c tr s t ti thnh ph Shijiazhuang, th ph ca tnh Hebei, Trung Quc. y l mt doanh nghip nh nc c quy m ln, sn xut thp trn kt cu cacbon cht lng cao, vi 8300 cng nhn vin. T mt doanh nghip sn xut thp thng, Shigang chuyn i sang doanh nghip sn xut thp cho t. c xy dng nm 1957, Shigang hin ti c kh nng sn xut 2,6 triu tn thp mi nm, v sn lng hng nm t khong 2 triu tn. Sn phm ca cng ty ch yu c bn cho th trng trong nc, v doanh s hng nm t gn 800 triu USD. Shigang nh gi cao tm quan trng ca d n GERIAP, v h mong mun ci thin nng lc ca cng ty v sn xut sch hn, v v vy gim chi ph sn xut v trnh nhng tc ng xu i vi mi trng.

M T QUY TRNH Hin ti, Shigang lin kt cc nh my thiu kt, luyn gang, luyn thp v cn thp v cc xng cn nh ca l h quang in (EAF) v cn thp. Quy trnh sn xut bao gm: Thu mua nguyn liu th: Tt c nguyn liu th c thu mua t th trng trong v

ngoi nc, bao gm bt thp tinh ch c sn xut trong nc, qung nhp khu, than cc sn xut trong nc, than c hm lng lu hunh thp,vvQung st cht thnh ng v c che ph gim bi.

Thiu kt: C bn my thiu kt, qung thiu kt c l cao s dng. Thit b kh bi in t hiu sut cao c lp t gim bi. Kh than l cao c s dng nh la nhm tit kim nng lng.

Luyn gang: C bn l cao, v sn lng gang thi hng nm l 1,7 triu tn. Tt c gang mui tiu c s dng cho quy trnh luyn thp. Mt ti lc c lp t ti l cao ht bi. Tt c lng kh than t l cao c ti ch ci thin vic s dng nng lng hiu qu.

Luyn thp: C hai l chuyn v mt l in trong quy trnh sn xut ny, v sn lng thp hng nm l 2,07 triu tn thp. Cc sn phm chnh bao gm thp kt cu cacbon cht lng cao, thp kt cu hp kim, thp lm bnh rng, thp l xo, thp lm bi. Cc thit b ht kh than, np chp kh l chuyn cho h thng lm mt nh bay hi c lp t ti l chuyn tit kim nng lng. Bi s b ht vo ti lc.

Cn thp: C bn dy chuyn sn xut. Xng cn thp th ba c mt dy chuyn cn thp thanh lin tc vi cng sut l 600 nghn tn, v cc sn phm chnh l thp thanh v thp cun. Cng ngh t chy v ti ch nhit d vi s h tr ca qu trnh lm nng s b khi thi c s dng trong quy trnh cn thp, gip tit kim nng lng.

Quy trnh sn xut c minh ha nh sau:

1 Hng dn s dng nng lng hiu qu trong cc ngnh cng nghip khu vc chu www.energyefficiencyasia.org

-{}-

Nh my thiu kt 2x 28m2 my thiu kt 2x 50m2 my thiu kt Bt st tinh

ch thu mua Than cc thu mua 800000 tn

Kho nguyn liu c gii ha

Qu

ng th

kim cao v thp qung thiu kt 2,6 M tn

Nh my luyn gang 1x230m3l cao(B.F.)

2x 300m3B.F. 1x 420m3B.F.

gang thi 1,5 M tn

Nh my luyn thp bng l chuyn 1x 300tFERCALK l nung vi hai chm tia

2x 50t l thi oxy (BOF) 3 my 12 b phn my c lin tc

120x120, 150x150 phi c lin tc 1,5 M tn

Nh my luyn thp bng l in 1x 30t l in nng thng thng

1 my 3 b phn c lin tc R9M2x 2 220x300 thp cn th lin tc hnh ch nht

300.000 tn

Nh my sn xut oxy

2x 6000m3/h my sn xut oxy 1x 15000m3/h my sn xut oxy oxy; nit; agon

Xng cn s 3 RR464-HSx6/ RR455-HSx6/ RR445-HSx6 Dy chuyn sn xut cn lin tc 1 triu tn thp thanh mi nm.

Xng cn s 2 530x1/400x3 bng ln theo chiu ngang 30-50mm thp thanh trn, v 32mm thp vn v 90x90-20mm thp thanh dt 400.000 tn

Xng cn s 1 650x1/530x3 bng ln theo chiu ngang 50-130mm thanh trn v 50x50-90x90mm phi 400.000 tn mi nm

P DNG PHNG PHP LUN

D tho Phng php lun s dng nng lng hiu qu ti cng ty c s dng lm c s nh gi nh my nhm xc nh v thc thi cc gii php gim thiu nng lng, nguyn liu v cht thi. Sau y l mt vi kinh nghim b ch: Nhim v 1b Thnh lp i v thng bo vi i ng cng nhn vin

Hng dn s dng nng lng hiu qu trong cc ngnh cng nghip khu vc chu www.energyefficiencyasia.org

2Cc vn mi trng v nng lng c nhng phng ban khc nhau x l. Vn nng lng chu s qun l ca phng K thut & Thit b, trong mi phng c b nhim mt

CNG TY TNHH ST & THP SHIJIAZHUANG: Nghin cu cng ty in hnh Gim c Kim tra nng lng (nh my st, nh my thp, ba xng cn, nh my in, nh my oxy, v cc b phn khc). Vn v mi trng thuc trch nhim ca Phng An ton v Sn xut Sch hn. m bo nhng nh hng ca c hai phng s c xem xt trong qu trnh nh gi, i din ca hai phng cng tham gia vo i. Bi hc kinh nghim: Khi cc vn mi trng v nng lng thuc trch nhim ca nhng phng ban khc nhau ti cng ty, cn c cc i din ca c hai phng tham gia i m bo nhng kha cnh v mi trng, chi ph/ sn xut c xem xt trong qu trnh nh gi.

Nhim v 1d La chn khu vc trng im Nh my thp c t ti thnh ph Shijiazhuang. V thnh ph ang m rng, nh my phi xt n vn dn c quanh nh my v a ra sng kin nhm lm gim tiu th ti nguyn m chnh nhng ngi dn xung quanh cng c nhu cu ngy cng tng. iu ny c bit c p dng vi ngun nc ngm, v theo bo co mc nc ngm ca tng ngm nc thnh ph h t m 30 mt xung m 70 mt trong vng 20 nm qua! Do nh my c nhu cu tiu th ln (600.000 m3/thng) v gi ca nc ngm l 1,5 rmb/m3 so vi 3 rmb/m3 i vi nc thnh th, cng ty mun tip tc s dng nc ngm nhng ng thi c gng gim tiu th nc. V vy, vic tiu th nc l mt tiu chun quan trng lc chn khu vc trng im v thp lm mt c chn l khu vc trng im do tiu th nhiu nng lng v nc. Bi hc kinh nghim: Ngoi nng lng, cc ngun ti nguyn khc nh nc cng ng vai tr quan trng khi la chn khu vc trng im, c bit nu ti nguyn c chi ph cao, ang thiu ht hoc l u tin trong chnh sch ca chnh ph. Nhim v 2d nh gi v k thut, kinh t v mi trng ca cc gii php Cng ty nh lp t h thng ng pht nhng v gi thnh qu t nn kh nhn c lng vn u t cn thit. Cng ty a ra gii php thc hin vic lp t trong vng 3 nm, nh vy chi ph c th a vo ba ngn sch ti chnh. Ngoi ra, cng ty cng tm hiu v ESCOs (Cc Cng ty Dch v nng lng) Trung Quc, cc cng ty ny c th h tr trong vic cho vay vn v i ly phn trm li nhun thu c. Bi hc kinh nghim: Khi vic tm vn cho nhng gii php tn km l mt tr ngi th c th ko di vic thc hin gii php trong mt vi nm. Gii php khc l tm kim s gip ca ESCOs, nhng cng ty c thnh lp ti mt s nc chu cung cp chi ph u t cho cc d n nng lng i ly phn trm tin tit kim trong vng vi nm. Bc 6 Ci thin lin tc Cng ty s tip tc thc hin Sn xut Sch hn v tit kim nng lng thng qua h thng qun l nng lng bng cch t ra cc ch s tiu th nng lng cho mi phng sn xut v c ch thng pht i vi nhng hot ng tit kim v lng ph nng lng. iu ng ch l cng ty c Phng An ton v Sn xut Sch hn nhm ch r cho nhn vin thy rng Sn xut Sch hn nm trong nhm u tin ca cng ty. Bi hc kinh nghim: Lp mt phng ban ring c tn l Sn xut Sch hn v/hoc Tit kim nng lng s gip nhn vin cng ty nhn thc r hn rng Sn xut Sch hn nm trong nhm u tin ca cng ty.


GII PHP

Khu vc trng im c la chn cho d n l (1) l chuyn, (2) thp lm mt. i xc nh c tng s chn gii php cho vic tit kim nng lng v gim thiu

lng ph, trong tm gii php c thc thi. Thng tin vn tt v cc gii php c cung cp bng pha di.

Tng vn u t cho cc d n thc thi l 9,75 triu RMB (khong 1,17 triu USD) Tit kim hng nm l 11,48 triu RMB, tng ng khong 1,39 triu USD. Thi gian hon vn kt hp l 10 thng

Cc d n thc thi gim 2711 tn CO2 mi nm (0,3 % ca tng lng CO2 ca nh my). Bn cnh , tiu th nit gim c 3,7 triu m3/nm, tiu th oxy gim 0,667 m3/nm v in gim 3,5 triu kWh/nm. Lng tiu th nc vn l vn mi trng quan trng nht ti thnh ph Shijuazhuang gim c 650.000 m3 mi nm.

Bng: V D V CC GII PHP THC HIN V IU TRA


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KHU VC TRNG

IM/GII PHP

K THUT SXSH

TNH KH THI V KINH T

LI CH MI TRNG

GHI CH

L chuyn/Lp t np chp kh trn l chuyn tn thu nhit (xem nghin cu in hnh)

Cng ngh/thit b mi

u t: 720000 USD Tit kim chi

ph: 900000 USD/nm Thi gian hon

vn: 10 thng

Tit kim hi: 148000 t/nm Tit kim than:

cha c cung cp Gim thiu pht

thi GHG: cha c cung cp Tit kim nc

c thc thi

L chuyn/my o lu lng nit, iu tra v sa cha r r (xem nghin cu in hnh)

Qun l ni vi tt u t: rt thp Tit kim chi

ph: 150000USD/nm Thi gian hon

vn: gn nh ngay lp tc

Tit kim in: 150000 kWh/nm Gim thiu pht

thi GHG: 115 tn CO2/nm Tit kim nit

3,7 triu m3

Vic i tu c thc hin vo thng 6 nm 2004. Nhng thng tin ny l c tnh da trn d liu thng 7 nm 2004.

L chuyn/My o lu lng oxy, iu tra v sa cha r r

Qun l ni vi tt u t: rt thp Tit kim chi

ph: 35000 USD Thi gian hon

vn: gn nh ngay lp tc

Tit kim in: 600000 kWh/nm Gim thiu pht

thi GHG: 470 tn CO2/nm Gim thiu

oxy: 677000 m3/nm

Vic i tu c thc hin vo thng 6 nm 2004. Nhng thng tin ny l c tnh da trn d liu thng 7 nm 2004.

L chuyn/ iu tra v sa cha r r kh nn

Qun l ni vi tt u t: thp/khng cn chi ph Thi gian hon

vn: ngay lp tc

Gim thiu r r kh nn Gim tiu th

nng lng

thc thi nhng cha tnh c th hiu qu

Qut ca thp lm mt/ Ci tin quy trnh tt qut mi vo ma ng

Qun l ni vi tt u t: khng Tit kim chi

ph: 160000 USD

Tit kim in: 2,75 triu kWh/nm Gim thiu pht

thc thi v c p dng cho khong 30 qut

CNG TY TNHH ST & THP SHIJIAZHUANG: Nghin cu cng ty in hnh

KHU VC TRNG

IM/GII PHP

K THUT SXSH

TNH KH THI V KINH T

LI CH MI TRNG

GHI CH

khi khng cn thit (xem nghin cu in hnh)

Thi gian hon vn: ngay lp tc

thi GHG: 2126 tn/nm

Thp lm mt/ Sa cha bm phun nh lng bixit ti thp lm mt (xem nghin cu kh thi)

Qun l ni vi tt u t: khng

c thc thi Gim s pht trin ca to

Thp lm mt/Tng s tp trung ca chu k nng cao hiu sut ca thp lm mt

Cng ngh/thit b mi

Khng c thc hin C th tng tp trung ca chu k thm 1,5 n 2,5, nhng vic tng thm 4,5 5,5 l khng kh thi xt v mt k thut.

H thng ng ng nc/Bo ton v thu hi nc (xem nghin cu in hnh)

Cng ngh/thit b mi

u t: 450000 USD Tit kim chi

ph: 300000 USD/nm Thi gian hon

vn: 1,5 nm

Tit kim nc: hn 650000 m3/nm Gim nhim

nc gin tip Tit kim nng

lng v gim thiu pht thi GHG cha nh lng

D n Khng x nc tip tc tn ti

BIT THM THNG TIN

GERIAP National Focal Point for China Mr. Wang Xin, Project Management Division I, Foreign Economic Cooperation Office of State Environmental Protection Administration No. 115, Xizhimennei Nanxiaojie Beijing 100035, the Peoples Republic of China Tel: +8610 66532316, E-mail: [email protected] GERIAP Company in China Mr. Wang Lumin Department of Engineering and Equipment Shijiazhuang Iron & Steel Co., Ltd No. 363, Hepingdong Road Shijiazhuang, Hebei Province, the Peoples Republic of China Tel: +0311-6912930 Email: [email protected]


Khuyn co: Nghin cu in hnh ny c thc hin l mt phn ca d n Gim Pht Thi Kh Nh Knh t Hot ng Cng Nghip Khu vc Chu v Thi Bnh Dng (GERIAP). Mc d c gng nhiu m bo ni dung ca bo co ny l chnh xc, UNEP khng c trch nhim v tnh chnh xc hay hon thin ca ni dung v s khng chu trch nhim v bt k mt mt hay thit hi m c th lin quan trc tip hay gin tip cho vic s dng hay da vo ni dung ca bo co ny gy ra. UNEP, 2006.


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CNG TY TNHH SAT & THEP SHIJIAZHUANGM T? CNGTY

M T? QUY TRNHP D?NG PHUONG PHP LU?N

B?ng: V D? V? CC GI?I PHP A~ TH?C HI?N V

shigang steel - company case study (vietnamese)

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