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PETROVIETNAM Cong nghe boc chong dn mon cho cac duong ong ddu khi tgi Nhd mdy boc ong PVID Hien trgng vd cdc cai tien, hgp ly hoa ddy chuyen cdng nghe TS Chu Chit Chfnh, KS Tran DCTc Minh, ThS NguySn[.]
PETROVIETNAM Cong nghe boc chong dn mon cho cac duong ong ddu tgi Nhd mdy boc ong - PVID: Hien trgng vd cdc cai tien, hgp ly hoa ddy chuyen cdng nghe TS Chu Chit Chfnh, KS Tran DCTc Minh, ThS NguySn PhUdrc Toin Cdng ty CP Ddu tU vd Xdy Idp (PVID) Nhd mdy Bgc dng Ddu f trift thude Cdng ty CP Odu tU vd Xdy idp - Tdng edng ty Khi Viet Nam - CTCP) id nhd mdycakhibge dng ddu ddu tiin tgi Viit Nam Cdng tdc chi tgo, Idp ddt, chgy thd ddy chuyen mdy mdc thiit bi Nhd mdy nhd thdu chinh - Tdp dodn Bauhuis international B.V cua Hd Lan thuc hiin Ban ddu, Nhd mdy dUgc trang bi hai ddy ehuyin thiit bj tlin tiin, hiin dgi nhd't trin thi gidi, dd id ddy ehuyin ddng bd bgc chdng dn mdn eho cdc dudng dng, sd dung phuang phdp bgc ba Idp 3LPE/PP (Poiyethylene/Polypropylene) kit hgp vdi Idp Idt FBE (Fusion Bonded Epoxy) vd ddy chuyin dong bd bgc bi tdng gia tdi cho dudng dng, dugc sddgng cdng nghi phun vdng (Impingement) liin tgc ed lUdi thip gia cUdng cho bi tdng, cho ede logi dng cd dudng kinh tU6-48 inch, edng sudt trung binh diiu kiin Idm viic mdt ea Id 240km dng bge/ndm [1], Ndi dung bdi bdo gidi thiiu vi hiin trgng cdng nghe bgc chong dn mdn Idp tgi Nhd mdy Bgc dng Ddu khi, sUcdn thiit phdi nghien cdu dixudt d^g dgng gidi phdp ddy ehuyen cdng nghi bgc idp tgi Nhd mdy vd gidi thieu tdng thi ddy chuyen cdng nghi bgc Idp PViD dixuat nghiin cdii, thiet kevd Idp ddt tgi Nhd mdy Bgc dng Ddu khL Gidi thieu chung Hien nay, t r l n the gidi thudng sd dung b i l n phUdng phap bpc chdng i n mdn cho dudng dng gdm: phUPng p h i p bpc Asphalt Enamel (AE), phuong phip bpc Fusion Bounded Epoxy (FBE) va phuang phip bpc Idp Polyethylene/ Polypropylene (3LPE/PP) ket hpp vdi Idp Idt FBE Phuang p h i p bpc AE d i cd td k h i l i u va l i phuang phap bpc chdng i n mdn phd bien nhat thap niln 60 - 80 cua the ky XX, nhien d i n nay, phUong p h i p n i y hau nhu khdng cdn dugc sd dung d cic nudc p h i t trien Nguyen n h i n bdi chi phi bpc AE.phu thupc nhilu Hinh I.Sodo tong the ddy chuyen cong nghe boc chong dn mon va boc be tong N Bgc dng Dau vao g i i dau md; dudng ong bpc AE cung ed ehi phi t h i l t ke, bao tri Anode eao hPn dung loai vat lieu bpe ong Phuang phap bpc tudi thp t h i p han so vdi eac phuang p h i p bpc t i l n tien chdng i n mdn duac trien khai tai Nhi m i y Bpc dng Dau khac; hPn nda AE edn dMc xac djnh l i v i t lieu g i y t i e cda PVID la phuong p h i p bpc Idp Polyethylene/ hai ddi vdi moi trUdng v i nhieu nUdc khdng cho phep sd Polypropylene ket hpp vdi Idp Idt FBE Day la edng nghe DAU KHf-sd 9/2012 51 • ONG NGHE - CONG TRINH D A U KHI mdi n h i t h i l n nay, dang dUpc sd dyng rdng rii t r l n t h i keo l i l n kit) v i ldp PE-PP (Idp dun q u i n - topcoat), c^c gidi Sa bd v l h i thdng bpe cic Idp tai Nhi m i y g6m: nguyin ll|u n i y t d cic m i y dUpc phun/dCin v l phia dng H I thdng bpc mdt Idp (Mono-layer system) g6m Idp Idt Fusion Bonded Epoxy (FBE), d i y 60 - 750|jm H I thdng bpe Idp (Dual-layer system) gdm Idp Dual Fusion Bonded Epoxy (DFBE), d i y 300 - 750|im 6ng dugc xoay trdn v i di chuyin tinh tiln vg phia trUdc Sau cic edng doan boc, 6ng se dupc lim mit b i n g nudc v i k i l m tra khuylt t i t n h i m p h i t hiln nhdng k h i l m khuylt t r l n Idp bpc d l t i l n h i n h sda chda, hoan t h i | n cdng do?n bpc chdng i n mdn - H I thdng bpc Idp (Polyolefin's three-layer system) 04 thye hl|n tdt v i d i m b i o c h i t lUpng k i t qui quS gdm Idp Polyethylene (PE)/Polypropylene (PP), chilu d i y trlnh bpc Idp, h i thdng d i y ehuyin cdng n g h i bpc 3L t d 1,5-20mm PE/PP duac trang b| cic t h i l t bj do, dupe l i p d i t tai cic - DUdng kinh 6ng bpe - 48 inch m i y d mdi cdng doan chinh n h i m k i l m tra v i hien thi cie thdng sd c i n k i l m soit sudt q u i trinh bgc Chilu d i i mdi dng 8,5 - 12,2m SP dd tdng t h i d i y ehuyin edng n g h i bpc ehdng i n Ddng thdi, PVID bd tri ddi ngu QA/QC true t i l p kilm tra c h i t lupng s i n p h i m tai mdi cdng doan cda q u i trinh mdn v i boe b l tdng Nhi may Bpc 6ng DSu dUpc t h i bpc n h i m d i p dng y l u c i u c h i t luang d i t theo yeu h i l n t r l n Hinh [2] c i u ky t h u i t cda mdi dy i n Tai m6i edng doan, cic ky su/cdng n h i n ky t h u i t v i n h i n h v i g i i m s i t q u i trinh Hien trang cdng nghe boc ch6ng i n mdn tai PVID bpc d l kjp thdi p h i t h i l n / x d ly nhijmg b i t thudng (neu 1.1 Gidi thiiu tdng thi ddy chuyin bgc Idp x i y ra) q u i trinh s i n xuat Hinh i n h tdng the hifei trang day ehuyin eong nghe bpc ehdng i n mdn cho cac H | thdng boc chdng an mdn la mdt d i y chuyen ban t u d d n g lam nhilm vu bpc cae Idp chdng an mdn FBE v i Idp PE/PP de b i o v l mat ngoai ong n h i m chong tac dpng ca hoc eho Idp FBE (5ng tran (bare pipes) dupc dUa vao he thdng bpc b i n g xe nang va eie b i n g chuyen ehuyin dung Tai eie bang chuyen, ong se dupe di chuyen, nang/ha qua eac bang ehuyen v i gidi han hanh trinh cda ong nhd eie can ning/ha va cic t h i l t bj ddng dng d i n ddng bang cic md to va xy lanh thCiy luc Trudc bpc, dng dupc dua v i o khu vUe lam sach b i n g phuang p h i p phun nudc cao i p de rda sach d i t , bui b i m t r l n ong q u i trinh b i o q u i n v i v i n chuyin dng t r i n v i g i i m ndng dd mudi cd t r l n b l m i t dng ( n l u ed) Sau dd ong dupe l i m ndng so bd (Preheating) b i n g dot (LPG) trudc chuyin vao l i m sach be mat ngoai b i n g phuang p h i p phun bi (blasting) d l tang b i m dinh gida b l mat dng v i Idp san chong an mdn FBE Sau dng dupe b i n Blasting, bd p h i n kiem tra chat lUpng s i n pham (quality control - QC) s i t i l n hanh c i c budc kiem tra nhU sau: k i l m tra nong dd mudi (salt test), hinh d i n g (profile) b l mat dng, dd byi (dust test) Kiem tra b i n g m i t thudng cae k h u y l t t i t tren b l mat dng ( n l u cd khuylt t i t , se t i l n hanh sda chda dng) Sau dd ong dupc gia nhiet c i m dng (induction coil) den khoang 220 - 245°C Tai eac edng doan bpe ba Idp (3L) gom: ldp FBE (Idp son chong an mdn), Idp Adheshive (Idp 52 dudng dng tai N h i m i y Bpc ong D i u dupe the hiln t r l n Hlnh PETROVIETNAM 1.2 Cdc logi cdng nghi bgc Idp Ve cdng nghe bpc chdng an mdn Idp hien d i u theo mpt nguyin ly chung nhU sau: dng dupe gia nhiet den nhilt dd thich hpp, sau dupc dua qua bpc cic Idp: Ldp 1: FBE - Phun tmh d i l n - Ldp 2: Adhesive - Phun bdt hoie extrusion (tdy Sa dd quy trinh bpe Idp (3 Layer application pocess) duac t h i hiln t r l n Hinh Cac noi dung c i i t i l n day chuyen cong nghe hoc chdng an mdn 31 2.1 Cdc ddc diim ehUa phu hgp cua ddy ehuyin cdng nghi bgc 3L theo dp day) Cdng suit eua may dun nhd (extruder) diJng cho Ldp 3: Topcoat - Ddn q u i n PE/PR bpe adhesive, khdng dd de dung cho bpc topcoat cda 5LPP Do chlnh lech d i u v i d i u v i o bpe 3LPE/3LPP V I edng nghe bpe Idp thd (Adhesive), phd b i l n ed loai edng n g h | boc: cdng n g h i bpc dung h i thdng sung la khoing 5mm, nhUng ddi vdi bpc 5LPP la khoing 10 15mm phun (Spray gun) va edng n g h i boc dung h i thdng dun H | thdng bing ehuyen khdng phd hap de bpc Idp (Extrusion) day t r l n 12mm 1.2.1 Cdng nghi boc dung hi thong dim (Extrusion system): - He thdng l i m mat khdng dd d i p dng cho Idp bpe day Uu diem: H I thdng cap lilu chua phu hpp cho vile bpe vat -i- Cdng suit cao, thich hpp cho Idp bpc day; lieu nhilu thinh phin + Tinh on djnh cao Roller bpc (Applycation roller) khdng dd dp mem Nhupc diem: de tao Idp boc cd ty trpng thap -I- Khd kiem soit chieu day Idp bpe; Thilu he thdng gia nhiet ben ngoai Idp bpc + Dp bam dinh gida eie Idp khdng eao 1.2.2 Cong nghe boc diing he thdng sung phun (Spray gun): Uu d i l m : Thilt bi cut-back khdng tao dupe bac (PP Toe) tai doan cut-back eda d i u dng (phuc vy cho cdng t i e bpe mdi h i n tai edng trUdng) 2.2 Cdc noi dung PVID dixudt vd dd edi tiin + Gpn nhe, cd the l i p dat khong gian nhd; - Lap d i t m i y dun mdi vdi edng suit Idn hon de bpc + Oe k i l m soit chilu day Idp bpe, thich hap cho eie Topcoat Idp boc c6 chieu d i y < mm; + Dp bam dfnh gida eie Idp eao; Thiet k l , c i i t i l n he thdng bang chuyen, cd t h i d i l u chlnh linh hoat theo chieu day Idp bpe -I- J^ le ong bi Idi eua ldp bpc thap Ndi d i i h i thdng lam m i t Bo sung them h i thdng lam m i t ben ong Nhupc diem: + Dd bui t h i i ngoii moi trudng eao; (internal quench) + Gii cao han Lip d i t t h i m miy tron vat lilu v i o he thdng cap lilu B9C Idp chfing in mdn Hinh Sado quy trinh boc Idp (S Layer application pocess) tgi Nhd mdy Bgc ong Ddu DSUKHI-SO 9/2012 53 •NG NGrif CONG TRJNH D A U KH[ Gia cdng roller bpe (Applycation roller) cd dd cdng dupc nghiln cdu, t h i l t k l hpp \^ v i sing tao v l b5 tri cic t h i l t b| d i y chuyin, chpn Ida cic t h i l t bj, d i l u ddng linh thip ho?t cic t h i l t b| nhu: h | thdng b i n g chuyin linh hoat, c6 Thilt ke, l i p d i t cP c i u gia nhi|t hdng ngo^i t h i d i l u chinh tdc dO, b l r^ng d l phu hpp vdi dilu k U i Thilt k l , l i p d i t t h i m m i y cut-back 5LPR m i t b i n g , n h i xudng hl|n tai cda N h i m i y v i vdi chi phi SU cSn thiet p h i l n g h i l n cihj, d l xujft g l i l p h i p d i y t h i p nhit Diy chuyin cdng n g h | bpc Idp bao gdm cic bd c h u y i n cong n g h i boc Idp p h i n , t h i l t bj chlnh: Do mdi tham gia v i o thj trudng bpc dng vdng + H | thdng m i y dCin vdi cdng suit 1.200kg/gidvi nam g i n diy, PVID da ehju nhdng i p li/c n h i t djnh tham gia d i u t h i u trye t i l p vdl cic doanh nghi|p bpc 750kg/gid dng h i n g d i u t r l n t h i gtdi Diy chuyin bpe Idp l i d i y chuyin chl dung d l bpc chdng i n mdn b i n g FBE mdt Idp + H | thdng b i n g chuyin linh ho?t, cd t h i dilu chlnh tdedd, b l r ^ n g p h d h p p v d i b p c L P R hay nhilu Idp hoic boc Idp PE/PP (FBE + Adhesive + + Ca c i u c i p l i l u vdi t^ I I pha tr^n chinh xic dSt PE/PP).Tuy nhiln, t r l n thye t i c h u d i u tumdt sSdUin ddi hdi khong chi ein sin p h i m bpc chdng i n mdn m i cdn 0,02% boc cich nhilt (bio dn) eho dudng dng, die b i l t p h i i d i p dng cic d i l u k i l n khie nghilt nhU: chiu duoc nhilt dd ^ •f- Cym m i y cutback dupc t h i l t k l gpn nhe phiJ h m vdi m i t b i n g d i y chuyin vdl tfnh h i l u q u i cao I cao v i n hinh (tdi 150'