thiết kế tháp đệm để chưng cất hỗn hợp benzen toluen năng suất nhập liệu là 21600 kg trên giờ

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9:>A>4ieg6!>BWUXU59:>Ajb>kHC?lHJ 9:>A>4 m nZ3opp6q 2Z  ! " LỜI CẢM ƠN 7744<5C?C!6arb16; 6kEH2H=/07<BWHV2PC4<==:s6Q2sM <;477<Q2_U<BW74AK tIP4"Ku 2i  ! " CHƯƠNG I: TÔNG QUAN LÝ THUYẾT 1.1 Nguyên vật liệu quá trình chưng cất 1>A7BJA+UXUY7>U>4cW:H":RQ2 H"IJ+UXUvO7OU2>6=27>U;<BWUXU=<D 627 1.2 Sản phẩm 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Các thông số ban đầu `^>7b:>4:PI1>c7b<D>1L `/B>AcW:UXU`7>UJNO2K>4UXU `cW: ‹+UXU^ o  o 5- + nehyq7>z ‹7>U^ e  h 5-  ndZyq7>z ‹lHJ9:>A m nZ3opp6q 23p [...]... quỏ trỡnh thit b Hi + Nng nhp liu: aF GVHD:Th.S Nguyn Quc = 37% (kg Benzen / kg hn hp) + Nng sn phm nh: + Nng sn phm ỏy: aP aw = 97,5% (kg Benzen / kg hn hp) = 1,8% (kg Benzen / kg hn hp) - Cỏc ký hiu: GF, F: sut lng nhp liu tinh theo kg/ h, kmol/h GP, P: sut lng sn phm nh tinh theo kg/ h, kmol/h GW, W: sut lng sn phm ỏy tinh theo kg/ h, kmol/h L : sut lng dũng hon lu, kmol/h aF : nng hn hp u,% khi... 2,778 (kg / s); G x = 21541,082 (kg / h) = 5,9836 (kg / s ) 1 Gx = c Gx + Gx = 15770,88 (kg / h) 2 1 c G y = 17946,3445 (kg / h) = 4,9851 (kg / s ); G y = 5,1906 (kg / s ) Gy = c G 1Y + G C Y = 18316 ,26 (kg / h) 2 l wtb = 0,7381(m / s ), wtb = 0,89464(m / s) wtb = 0,81637 (m / s) Trang 32 ỏn mụn hc quỏ trỡnh thit b Hi GVHD:Th.S Nguyn Quc x c = 786 (kg / m 3 ), x l = 804 ,04 (kg / m 3 ) p x = 795,205( kg. .. on chng v luyn ca h cu t Benzen Toluen vi N=18 Trang 16 ỏn mụn hc quỏ trỡnh thit b Hi GVHD:Th.S Nguyn Quc Hỡnh 4:Phng trỡnh ng lm vic on chng v luyn ca h cu t Benzen Toluen vi N=15 Trang 17 ỏn mụn hc quỏ trỡnh thit b Hi GVHD:Th.S Nguyn Quc Hỡnh 5:Phng trỡnh ng lm vic on chng v luyn ca h cu t Benzen Toluen vi N=14 Hỡnh 6:Phng trỡnh ng lm vic on chng v luyn ca h cu t Benzen Toluen vi N=12 Hỡnh 7:Phng... , rb : n nhit húa hi ca Benzen v Toluen nhit tc = t w + t F 110.6 + 94,89 = = 102,7450 c 2 2 tra bng I-212/254.[I] ta cú : rcB=376635,5785(J /Kg) ;rcT=366743,217(J /Kg) ; c r1 = 376635,5787 0,015 + (1 0.015).366743,217 = 367237,8351( J / kg ) r1 c Vy (3) c g1 = r1 c g1 = 1,0346806721010 = 28174 ,67518 (kg / h) 367237,8351 c G1 = g1 + G w = 28174 ,67518 + 13655 = 41829,67518 (kg / h) (1) Vy lng hi trung... , 018 GW + 0 , 975 GP = 0 , 37 .21600 Gp = 7945 (kg/ h) Gw= 13655 ( kg/ h) Tinh khi lng mol trung bỡnh Trong hn hp u: MF= xF MB+ (1- xF )MT= 0,41 78 +(1- 0,41).92 = 86.26 (kg/ kmol) Trong sn phm nh: MP= xP MB+ (1- xP )MT= 0,979.78 + (1-0,979).92 = 78,29 (kg/ kmol) Trong sn phm ỏy: MW= xW MB+ (1- xW )MT= 0,021.78 +(1- 0,021).92 = 91,71 (kg/ kmol) Lu lng tinh theo kmol/h: F = 21600/ 86,26 = 250,41 kmol/h P =... =7945 (kg/ h) = 101,85(kmol/h) r1 : n nhit húa hi ca hn hộp i vo a th nht ca on luyn rd = rB yd + rT (1 - yd ) rB , rT : n nhit húa hi ca Benzen v Toluen nguyờn cht tl= tF + tP = 87 ,7655 2 nhit tl = 87,7655oC, tra bng I-212/254.[I ]v bng phng phỏp ni suy : Ta cú : rB87,7655 = 387869,5(J /Kg) ; rT 87,7655 = 374585,2086(J /Kg) Vy rd = rB yd + rT (1 - yd )= 387869,5.0,979+(1-0,979).374585,208 =387590,53(J /Kg) ... (phn mol) : nht ca Benzen v Toluen 87,7655oC, c tra bng I-101/91.[I] v bng phng phỏp ni suy ta cú : à1 = 0,2946449.10 3 à 2 = 0.3003628.10 3 3 à x = 0,2964.10 Tinh lu lng lng, hi trung bỡnh i trong on luyn: GX = G1 + G R 2 G R = G P R x = 7945.2,36 = 18750 ,2 (kg / h) = 5,208388 (kg / s ) Trang 27 ỏn mụn hc quỏ trỡnh thit b Hi GVHD:Th.S Nguyn Quc G1 = 1252,489 (kg / h) = 0,3479136 (kg / s) Gx = Gy =... phn Lu lng Nng khi lng phn mol Trang 13 Lu lng (kg/ h) (kmol/h) ỏn mụn hc quỏ trỡnh thit b Hi GVHD:Th.S Nguyn Quc Hn hp u 0,37 0,41 21600 Sn phm 0,975 0,979 7945 101,48 0.018 0.021 13655 148,9 250,41 nh Sn phm ỏy 2.2.2 Cỏc phng trỡnh lm vic - T s liu bng 1 ta xõy dng th cõn bng pha ca h Benzen- Toluen ỏp sut 1atm: Hỡnh 2: th cõn bng pha ca h Benzen- Toluen ỏp sut 1atm - Vi xF = 0,41ta ni suy t ... 0.34).92 ].273 = 2,83 (kg / Vtb = 2 g tb c ytb c = m3 ) 18686 ,082 = 6602,85583 (m 3 / h) 2,83 Vy Khi lng riờng trung bỡnh i vi pha lng on luyn 1 c xtb = c atb1 = a c tb1 1 a c tb1 + xb xT a F + a w 0,37 + 0.018 = = 0,194 2 2 xB , xT : khi lng riờng ca Benzen v ca Toluen nhit trung bỡnh ca on chng 102,745oC xtb = 789 ,706 (kg / m 3 ) xT = 785 (kg / m 3 ) c xtb = 786 (kg / m 3 ) Suy ra: Tinh... àT ; xtb = xw + xF = 0,2156 2 à B , àT (phn mol) : nht ca Benzen v Toluen nhit 102,745oC : à B = 0,2552355( Ns / m 2 ) à T = 0,26551( Ns / m 2 ) 2 à x = 0,26326( Ns / m ) c Tinh lng lng, hi trung bỡnh GX, GY : C Gx C G + G1 1252,489 + 41829,67518 = 1 = = 21541,082 (kg / h) = 5,9836 (kg / s) 2 2 c G y = g tb = 18686 ,082 (kg / h) = 5,1906 (kg / s ) Do ú: G' lg ' 2 = A 1,75 x S G' y 1 1 4 ' . đường làm việc đoạn chưng và luyện của hệ cấu tử Benzen– Toluen với N=14 Hình 6:Phương trình đường làm việc đoạn chưng và luyện của hệ cấu tử Benzen– Toluen với N=12 Hình 7:Phương trình đường làm. trình đường làm việc đoạn chưng và luyện của hệ cấu tử Benzen– Toluen với N=13 Hình 9 : Đồ thị mối quan hệ giữa R và N*(R+1) Ta xác định được RTH=2,36 Số ngăn lý thuyết của tháp chưng là: 14 Số ngăn. 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