TAPCHlDJUKHl So 5 2020, trang 43 50 ISSN 2615 9902 DauKhi l PHUC HOI ROTOR VA NANG CAO DO TIN CAY CHO M A Y NEN KHI Le Thanh Hdi, IriSang Anh Tuan, Nguyin Van Hien, Nguyen Thanh TiJng, N g u y i n Anh[.]
TAPCHlDJUKHl So 5-2020, trang 43-50 ISSN 2615-9902 DauKhil PHUC HOI ROTOR VA NANG CAO DO TIN CAY CHO MAY NEN KHI Le Thanh Hdi, IriSang Anh Tuan, Nguyin Van Hien, Nguyen Thanh TiJng, N g u y i n Anh Khoa Cong ty Co phan Phan bdn Dau khiCa Mau Email: hailt@pvcfc,com.vn Tom tilt May nen khong iy tam la thiet bi quan trong cac nha may hda chat, Igc hoa dau, tin cay cua thiet bi anh htrcfng den van hanh an toan va on dinh cua ca nha may Chu dong tmng cong tac bao duong, sifa chiJa va tif phuc hoi sira chifa b^ng nguon life Irong nddc dang difdc thuc hien tai cac cong trinh/nha may ciia Tap doan Dau Viet Nam (PVN), giup tiet kiem thdi gian va chi phi san xuat Bai bao gidi thieu giai phap phuc hoi mtor may nen ly tam tai Nha may Dam Ca Mau, difoc thtfc hien bang nguon Ittc ni/dc tren co sd danh gia hif hong, phan tich, dinh lifong life dpc true va ben dia chan cua rotor Dong thcfi, Cong ty CP Phan bdn Dati Ca Mau (PVCFC) da tinh toan cong suat thiet bi sau phuc hoi de dam bao thiet bi van hanh toi ifu nhat Tir khoa: Dp tin cay thiet bi, may nen !y tam, phuc hoi mtor, hoc may nen, Nha may Bam Ca Mau 1.GiG(i thieu Hien tucfng hoc may nen hay tang ap dau xa mo hinh hoa cac su co, tranh cac hu hong van hanh binh thudng cung nhUqua trinh difng khan cap [2- 5] gay dpi ap (surge) la moi nguy doi vdi may nen ly tam; CJViet Nam, cac nha may hoa chat, dau co van hanh la sU dao dong ciia ap suat tai dau may nen, van toe cac cum may nen ly tam, viec cai tien he thong dieu khien dong va hien tuong diio nguoc dong chay IVloi may dang duac quan tam nhU: mo phdng hien tUong hoc nen ly tann co gidi han ap suat van hanh toi da va dong toi de toi Uu cong tac van hanh [6] hay thay doi vat thieu Ngoai diem nay, hien tUOng hoc se xay Khi lieu thiet bj luu luang, thay doi dUdng ong nham nang ap suat, van tdc dong dau may nen dao dong, dan cao dp tin cay cho bo dieu khien may nen [7] denrotordaodong theo hudng doc true, gay cpxat manh Doi vdi viec khac phuc hU hdng rotor qua trinh giQa chi tiet quay va chi tiet tinh, pha hiiy ve mat ca may nen bi hoc gay hu hong, can ctr theo tinh dac biet la chan, dia chan tren rotor bj va dap iUc doc trang thiet bi seed phuong an khac phuc hay thay mdi cac triJc(Hinh5), cothegay pha huy nghiem trgng [1] bo phan quan nhU: rotor, bp phan Iam kin, truot, De dam bao an toan cho may nen khi, he thong dudng chan, Phuc hoi rotor co the tuan theo cac tieu chi ong ket noi vdi may nen se dUOc lap dat cac van tuan tieu chuan Vien Dau My (API) ve sCfa chQa rotor [8] tieu hoan hoac van xa hoac ket hap ca hai (van xa chi ap dung chuan ISO [9] doi vdi nen khong anh hudng den moi trudng nhu khong khi, CO^, } ket noi vdi bg dieu khien se tU dong kich hoat cac van theo tuan tu de dam bao giam ap suat dau cua may nen ve gia tri cho phep (Hinh 1) - Toe toi aa Hoac CO the giam toe dp van hanh cum thiet bi de giam Gidi han cong sual luu luang va ap suat dau x^ cua may nen Tren the gidi da co cac nghien cCfu ve toi Uu he thong ^.^^Storewall or dieu khien may nen, logic, lap dat cac van dieu khien, thuat toan xac djnh gidi han van hanh, gidi han hoc va ^ — Toe So toi Ihieu Vung van hanh thirc te Ngiy nhdn bai 22/4/2020 Hgdyphon biin ddnh gia nd sda chOa: 23/4 - 6/5/2020Ngaybdibaodmduyiliang S/5/2020 Vung van hanh cho phep LUu iL/ong may nen Hinh I.Sothi von hanh cdo DAU KHI SC) 5/2020 43 j Gtm han van tunh tnay nen Gioi han ffi£u kN^-suTDe- Hinh Bo dieu khien ddm bao may nin khdng bi hoc i.hirtualien coc thong s Hinh Da thi gidi han diem von honh va dieu khien hoc may nen Luuluong luang (FJ) op ml ddu hut va ddu xo (PI) Ap suat T h i g i a n (giay) Hinh LiTu luang nen dao dong qua tnnh may nen bi hoc Thai gian (giay) Hinh S Ap sudt dao dong guo ninh mayn^n khibi hoc Hlnh Dao dong rotor may nen khibi hoc Hinh Nhiet dong nen tdng Irong guo trinh may nen khibi hoc N h a m a y D a m Ca M a u d a n g v a n h a n h c u m m a y n e n c h e d p v a n h a n h k h o n g tai D o t h i e t ke logic d d n g m d c a c k h i d a n g ly t a m la t h i e t bi c h i n h c u n g c a p k h o n g k h i c h o v a n d i e u k h i e n chUa p h i i h o p d a n d e n m a y n e n k h i bj h i e n c u m c o n g n g h e c r a c k i n g va c o n g d o a n h y d r o h d a t u a n g h o c k h i g a y h u h o n g r o t o r m a y n e n k h i c a p va D o loi c o n g n g h e c i i a c o n g d o a n k h a c t r o n g n h a m a y , Vl vay, c a n p h i i sifa c h u a m a y n e n k h i d u a v a o v a n t h e o l o g i c m a y n e n k h i se dUOc t U d p n g t a c h k h o i h e h a n h lai v d i t h d i g i a n d i f n g m a y n g a n , d a m b a o s a n x u a t t h o n g va d u y tri v a n h a n h c h e d p k h o n g t a i T r o n g q u a k h d n g b i g i a n d o a n t r e n e o s d n g u o n lUc t a i c h o Viec h u y t r i n h nay, k h o n g k h i n e n d d a u cua m a y n e n k h i t h e o d o n g e h u y e n g i a va h o t r o t u nha san x u a t t r o n g t r u d n g n g u y e n t i c se d u q c xa t h a i t r u e t i e p m o i t r u d n g v d i t h d i g i a n n g a n n h a t d e d a m b a o m a y n e n k h i k h d n g bi h o c k h i h a y d p i a p , n h u n g n e u xa q u a Idn c u n g se g a y t i n h t r a n g q u a t a i T h e o t h i e t ke h e t h d n g d a u d u o c l i p d a t cae v a n h p p n a y k h o n g t h e t h a t hiPr d u o c d o g i d i h a n ve d i a ly va t h d i g i a n T i / t h u c t r a n g d o , PVCFC da n g h i e n c i f u , d e x u a t cac g i a i p h a p k y t h u a t n h S m p h y c h o i r o t o r va t h a y d o i l o a d i e u k h i e n se k i c h h o a t xa k h i t u a n t u d e d a m b a o d u y t r i d i e u k h i e n t h i e t b i n h S m d u a t h i e t b i v a o jan h a n h I • t h i e t bi o n d i n h t r o n g q u a t r i n h t a c h t a i va d u a t h i e t bi v e t h d i g i a n t o i U u , t a n g d o t i n c a y c h o t h i e t b| t r o n g q u s t r 44 DAU KHI 5/2020 •• van hanh binh thucing va xay su CO Giai phap giam duoc chi phi thay mdi rotor, rut n g i n thdi gian phuc hoi, sda ehUa thiet bj, khdng phai thue chuyen gia, toi Uu ngudn luc thUe hien Ly thuyet tinh toan GT070L5K1 ' C6ng suat (KW) ApsuatdSuraclip Smg dpc true HM:| S yuotquagtaf"! cho pher 6]; Thay doi logic kich hoat t d tach t i i may nen ^^ sang dimg ''-•oat dpng xay su c d Tin hieu dieu khien dimg khan cap se dapc kich hoat may ren ehuyen sang ^^ che dung theo logic nen dau dupc xa moi m/cmg, may nen giam dan tdc dp va dimg hSn 06 he dung Ong nghe whgic: Ngoai ra, theo dieu tra nguyen nhan dimg khan cap de tach tai may nen kni -.-z hp tieu thu, cac van dieu khien cd lap 04FV20n, 04FV2016 (Hinh 16} he thong dUpc kich hoat ddng lap tdc, 10 giay sau van xa 04UV2012 duoe kich hoat de xa ap cho dau miy nen khi, ddng thai van dieu khien 04UXV2211 ddng HMU.lapd&doudodkhdvyaiaJanjIamcaihKliiahtthAigpaiiidt lai, cac van IGVl, IGV dieu chinh luu lupng vao may nen dong, Iuc Tinh toan dp ben dia ehan giam chieu day 4,5 mm, dam bao cho may van 04FV4203 se dieu khien luu nen van hanh binh thudng eung nhu cd sU cd, nhdm tac gia da de xuat lupng may ner • " dua theo tin hieu giai phap phyc hoi va thay doi logic nham tang dp tin cay d>o cym thiet bi cua FT4209 Tuy nhien, theo logic lUu Cu the, ve phucmg an thuc hien phuc hoi, sua chOa rotor cap - bi hu hdng lupng tai FT2011 cung dung de dieu theo cac budc: khien m i y nen bd tri sau van Xir ly vet xudc tai vi tri dia chan sd (giam xuong 4,5 mm : xa 04FV4203, dan den may nen se tang tdc va mo van IGVl, IGV de bu Them vdng dem vao dd chan de dam bao khe hd da chan so n i m tieu chuan 0,23 - 0,31; Oieu chinh lai tam rotor sd va tam banh rang chinh so bSng each chinh dd chan binh rang chinh (neu lech); £)ieu chinh t h i n m i y nen so va sd de dam bao khe hd rotor cap va cap ^ nam gia tn cho phep; Can bSng dpng rotor theo tieu chuan 150 1940-1:2003 i;9: 2.4 Thay doi ve logic De dam bao m i y nen van hanh an toan va tin cay tranh sU co tucmg t J nhom rac gia de xuat thay doi logic nhu sau: luu luong tai vi tri luu lupng giam dan ve khdng dan den tinh trang hoc Oe d i m bao an toan can thay doi logic, cd su co, may nen se tach tai khdi hp tieu rnu bang each ddng cae van eo lap dau 04FV2011, 04FV2016, md van xa 04UV2012 va sH dung FT4209 de dieu khien may nen kich hca: /er xa 04FV4203, dong thdi gia lip tin hieu FT2011 luu lupng toi d a - se dong van dieu chinh luu luong da , vac Glim sd lan dem xung hdc kich hoat ddng may nen de tranh bi va dap dimg neu bi hdc khi; Tao cac canh bao can thiet cho may nen -^ - tren he thong dieu khien phan tan va dieu khien PLC Lip cac dau vdi dp p h i n giii la 0,001 mm de theo doi djch 48 he thorg -: e._ kich hoat dung n^ tai may nen IT • van hanh an t o ; ' -•^'"^-"'-gtren ''^'-, t - e o s u c o s e ".en r i hay tach ^"^^5-.ay nen •_~