A2(-2x) MI =x、[A、-42-412(-2x:) A-41-12|>0 (3-27) Vnl+S=L+d (3-28) Lx+Dx D (3-30) y)=x-(x,]+2-x:(x,) (3-31) y 1-(x。)”1-(x,h h=L-(x,)]:vn=V-,片] 3-32) =-x+Dx(,)] (3-33) (x,b≈0 L ()1<(x
( ) ln ln 2 1 A x P P a s 2 s 1 + − = 12 1 (3-25) s 2 s 1 P P 1 1 x = x ( ) ln s 1s 12 2 1 x A A A x 2s s = − − − 1 (3-26) A1s − A2s − A12 0 (3-27) Vn+1 + S = Ln + D (3-28) DxD Vn+1 yn+1 = Ln xn+ (3-29) D x V D x V L y n 1 n n 1 n 1 + + + = + n (3-30) ( ) ( ) ( ) s D n 1 n s n n 1 n 1 s n 1 1- y 1- x xD 1- x V D x V L y = + + + + + n (3-31) ( ) ( ) ( ) s D d s n n n s n 1 n 1 n 1 1- x ; 1- x ; 1- y D x x x y y = = = + + + x ( ) ( ) s n n n s n ln = Ln 1− x ; v =V 1- y (3-32) ( ) s D n 1 n n 1 n 1 xD 1- x v D x v l y = + + + + n (3-33) (x ) 0 s D D x v D x v l y = + + + + n 1 n n 1 n 1 n (3-34) ( ) ( ) s n s n 1 n 1 n 1 n 1- x 1- y : + + + = v l V L n (3-35) ( ) ( ) s n 1 s n y x + : 1 n 1 n 1 n + + v l V L n
n1(y)1+S=Ln(x,)+D(x,) 3-36) Vn+(ys)m+=Ln(xs) S,=L,(xs) Sn=S+Vn(ys) (3-38) Ln=I+S+S Cps(T-T)/AH Vnl=l +D-s L=ln+S+S·Cs(Tm-TH, (3-41) L +s 3-43) Bx y (B-1)x xs (3-45) (1-)L B ys x,+x2 (3-46) aist x2 B>0.05 x 3-47 (1-B)L x 或 (1-B)L 若B=0,,当进料为饱和蒸汽时,则x。=x x <x ()w=S/w
( ) ( ) ( )s D V + S = L + D x n+1 s n+1 n s n y x (3-36) ( ) ( ) n 1 s n 1 n s n V y + S = L x + + (3-37) ( ) n n s n S = L x ( ) n n 1 s n 1 y + + S = S +V (3-38) ( ) n S S C Tn Ts Hv Ln = l + + • P,S − (3-39) Vn+1 = Ln + D − S (3-40) ( ) m S S C Tm Ts Hv Lm = l + + • P,S − (3-41) V = L − (W + S) m +1 m (3-42) Vys + S = Lxs (3-43) ( ) s s s 1 1 x x y + − = (3-44) ( ) − − − = s s 1 1 x D L S x (3-45) 1s 1 2s 2 1 2 s 2 2s s 1 1s s 1 2 s s s s 1 x x x x x x x x x x x 1 x x 1 y y + + = + • + = − − = (3-46) 0.05 ( ) − − + = s s 1 1 x W L S x (3-47) ( ) L S x L S x − s = 或 s 1 s s L x 当进料为 则 s s 若 = 0，， 饱和蒸汽时， x = x s s x x (xs )W = S W
L'>M Pr 1=1 (3-48) P2 (3-49) P`=f(T),P=f2(7) P=Yx,P+r2x,P (3-50) P P1+P2 P-P.< p2 P,=PRix, p2=PSr2x2 Ps(-r x1) 则x1≈1,x2≈1,即 Ps x E P Yix=yixI (-x1)=y(-x2) (3-56) P=Pyx+Psri (-xI (3-57) = Y3 Pi P=Y,,Ps+y, P2+r,x, P3
L W ( )s W s x x 1 2 s 2 1 s 1 12 = = P P （3-48） 12 =1 s 2 s 1 2 1 P P = (3-49) P f (T ) P f (T ) = 1 = 2 s 2 s 1 , s s 1 1 1 2 2P2 P = x P + x (3-50) s s P = p1 + p2 P1 P2 (3-51) P1 − p1 p2 s (3-52) 2 2 2 2 1 1 1 1 1 p P x p P x 2 s 2 s = 1 , = ( ) 1 1 2 2 2 2 1 1 1 1 − P x P x s 2 s 1 (3-53) 1 2 2 1 1 2 2 1 则x1 1，x 1，即 1 2 2 2 = • x x P P E 1 s 2 s 1 (3-54) 1 2 2 1 1 1 1 1 x = x (3-55) ( ) ( ) 2 1 x - x 2 1 2 1 1 2 1 1 − = (3-56) ( ) 1 2 1 1 1 1 P P 1 x P 1 x 1 = 1 + − s 2 s (3-57) 12 =13 = 23 =1 s s 1 1 3 3 P P = (3-58) s s 3 2 2 3 P P = (3-59) s s s 1 1 1 2 2 2 3 3P3 P = x P + x P + x (3-60)