Phgm Vdn Tuynh vd Dtg 135(05): 199-206 Tap chi KHOA HQC & C N G NGHE N G H I E N c t r u T H I E T K E D I E U K H i f e N T H U D Q N G C H O L O P H A N iTNG HOA H O C LIEN T U C (CSTR) Ph?m Van Tuynh'*, Ngo Van Hai', Mai Thi Doan Thanh^ ^Truang Bai hoc Bach Khoa HdNpi -Trudng Cao ddng nghe Dd Ndng TOM TAT Lo phan iing hoa hpc lien tuc CSTR dugc sii dung bien nganh cong nghiep hoa chat Cdc nguyen lieu hod chdt dau vao co nong dp CABI dugc ngp lien tuc vao 16 va qud trinh phan iing xay tao nen pham dau co ndng CA dugc lay lien tuc vay CO nang suat rit cao Xet v i khia canh dieu khien, 16 phan iing la d6i tugng phi tuyin, xen kenh, vi vay viec diiu khiin theo luat PID co gidi han lam giam c h i t lugng cua dong san pham dau vd dan den phai chap nhdn giam nang sudt ciia 16 D e khac phuc nhuoc dif m tren cdc nhd nghien ciiu iing dung thuat difu khien phi tuyin va thiit k i diiu khiin phi tuyen cho qua trinh 16 phdn iing Trong ngi dung bai bdo ndy, cac tdc gid se sir dung phuong phap dieu khien phi tuyen thu dgng de img dung dieu khien 16 phan ung hoa hpc lien tuc CSTR Tir khoa: CSTR, bp dieu khien thu dong, cdn bdng, ham du trie, phuong trinh trgng Ihdi DAT VAN DE Phuong trinh can bang phan: Tren hinh I mo hinh 16 phan iing ta co: Luu lugng mdi chat hoa hge dau vao Fm vdi nhiet Tm vd nong dp thdnh phan ban dau CAm dugc dua vao 16 phan ung N h d dgng c a khuay trgn hon hgp moi chat dugc d o n g nhdt vd bdt ddu xdy qua trinh phan ung chuyin doi tao san pham ddu co ndng CA Phdn ling dugc bien doi 16 se la qua Uinh phdt nhiet vi vgy can phai dieu khien de giu nhiet dp phdn iing T khong doi, dieu thuc hien bdi he th6ng ldm mat gpi la jaket Jaket dugc dugc cap lugng nude lam mat co luu lugng Fc nhift dp ddu vao Tcin sau lam mat 16 nhift nude lam mdt co nhiet dp Tj K - ^ - F C , - C , -Vke'""C, (2) dt Phuong trinh cdn bang nang lugng (khong tinh can bdng cdng suat c a khuay trpn): c^,,\-~ = cj,F_(T D~l, VLli -kAT-T) (3) Ddi vdi Jaket t a c o : dT, Phmrag trinh dong bpc 16 phan irng hoa hoc CSTR | i | Phuang trinh can bdng khdi lugng: dpV = pF,„ - pF dt * Tei 0982 835493 Email: pvtbldin(^mail.c (1) Hinh Mo hinh dieu khien 16 phdn iing hoa hoc lien tuc CSTR Pham van Tuynh vd Dtg Tap'chi KHOA HQC & CONG NGHE Trong do: - Nong thdnh phan dau CA (kmol/m^) - The tich dung djch 16 phan iing V (m^) V=h.A, h chieu cao dung dich (m), A dien tich mat dimg dich 16 phan ung (m-) Id khong ddi, - Nhiet 16 phan iing T (K) - Luu lugng dong sdn pham ddu F (mVs) - Luu lugng nude Iam mat vao jacket Fc (mVs) - Luu lugng chat dau vao F^^ (m^/s) - Nhiet dp chat dau vao T^^ {K) - Ndng dp thdnh phan dau vao CADI (kmol/m^) - Nhift dp nude lam mat T^^^ {K) - Nhiet dp ddu jacket T {K) Khoi lugng rieng p(Kgmol/ni') cua dung djch phan ling dugc coi khong doi - Khdi lugng riengp^ (Kg/m^) ciia nude ldm mat khong ddi - Cpc, Cp nhiet dung rieng ciia nude lam mat, vd nhiet dung rieng ciia dung dich phan iing la khong ddi - Tdc dp phan lingki: k^•,.^ -k^e^ ko: hdng so toe phan iing; E: nang lugng cho phdn iing (J); R: hang sd chat 8.134 J/(kmol.K) (hinh 2) k(Tr Hinh Do thi sy phu thudc ciia C^ theo T vd k(T) theo T Phan tfeh qua trinh 135(05): 199-206 Tir cdc phuong trinh ddng hpc ciia 16 phan ling ta di phdn tich vd xay dung md hinh dieu khien (tren hinh 3) nhu sau: Ta CO bien cai difu khien h(V) dam bdo can bang khdi lugng cd hai khd nang dieu khien Fm hoac F chpn F vdi van dieu khien Vi la co cau chap hanh Myc tieu dieu khien Id ndng san phdm ddu 16 CA, nhien CA Id ham ciia nhift dp T CA(T) (xem hinh 2) Vi vay neu dieu khifn nhiet phan irng khdng ddi ta co ndng dp mong muon De dieu khien nhiet dp phdn iing ta dieu khifn cdng suat lam mat thdng qua luu lugng Fc Vay ta co bien dieu khien Id Fc vd van dieu chinh V? la ca cdu chap hanh Cau triic dieu khien dugc trinh bay tren hinh I CO mach vong: mach vdng dieu khien miic h(V) va mach v6ng dieu khien ndng dp (nhift dp), Cdc dgi lugng nhifu: nhieu dau vdo Fm, Tm, CAH, Tcm Bien Tj la bien ty khdng can dieu khien Mach vong ddm bdo can bang khdi lugng co tac ddng xen kenh vdi mach vong dam bdo can bang thdnh phan, can bing ndng lugng Do ddp ling ciia mgch vong dieu khien miic nhanh [1] ngi dung bdi bdo chi di thilt ke mgch v6ng dieu khien ndng dp (nhiet dp), liic dd coi h(V) Id dai lugng nhieu Phutmg trinh trang thai ciia qud trinh nong (nhiet do) Tir phuong trinh (2) dat cac biin trang thai xi Id CA; X2 la T; X3 la Tc Bien ddi, ta co phucmg trinh trang thai cua qud trinh (5) Gia thiit van dieu khien luu lugng nude ldm mdt V2 la van tuyin tinh: Fe=kv.u Vdi he sd khuich dgi ciia van: kv=F/Fma.;, u: goc md van (%) (5) Hinh Md hinh dieu khien 16 phan iing Pham Vdn Tuynh vd Dig Tgp chi KHOA HOC & CONG NGHE Nhan xet he p h u a n g trinh (5) la he p h u a n g trinh phi tuyin thupc dang chuin ailne: }x=f(x)+g I X u (6) y = h{x) De thiet ke md hinh dieu khiin dang afine co the sii dung duge nhieu giai p h ^ thift k i : p h u a n g phap cudn chieu (Backstepping), dieu khien phan hdi trgng thdi, difu khiin thy dgng, difu khiin logic md, n a r o n Trong ngi dung bdi bdo sii dung phucmg phap thiet k i difu khifn phi tuyin thu dpng [4], vi ddng hge qud trinh hod hge dfu dua tren cac phuong trinh can bdng phii hpp vdi difu khifn thu ddng LY THUYET T H I E T K E DIEU THU DQNG KWEN Mpt he duge gpi thu ddng neu tdn tgi ham trii nang lugng V(x) xac dinh duang, thoa man[3] dv(x) _dv (8) - f + gu ^y'n dt ~ dx Thu dgng chdt neu: dV{x) _ dv - f + gu m Ngdy nhdn bdi:27/4/2015; Ngdy phdn bien-18/5/2015; Ngdy duy?t ddng:'31/5/2015 Phdn biin khoa hpc: PGS TS Lgi Khde Ldi - Dgi hpc Thdi Nguyen ... ben ngoai cung cap vdo cho he Ap dyng dinh ty KYP (Kalman Yakubovich Popov): Mgt h e thdng (6) vdi cdc vector / g A n e u ton tai mgt hdm Hen tuc duong Vix-'' R vdi V(0)=0 cho: L,V{.x)