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2.3 闪蒸过程的计算 PowerPoint PPT Presentation


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2.3 闪蒸过程的计算. 节流阀. 加热器. 冷凝器. 顶部产物 V , y. 底部产物 L , x. 2.3.1 等温闪蒸和部分冷凝过程 2.3.2 绝热闪蒸过程. 闪蒸过程描述. 闪蒸是连续单级蒸馏过程。 它使进料混合物部分汽化或冷凝得到含易挥发组分较多的蒸汽和含难挥发组分较多的液体。 普通精馏塔中的平衡级就是一简单绝热闪蒸级。. 闪蒸过程的计算方程( MESH ). C 个. ( 1 )物料衡算 —M 方程:. ( 2 )相平衡 —E 方程:. C 个. 2C + 3. 2 个. ( 3 )摩尔分率加和式 —S 方程:. 1 个.

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2.3 闪蒸过程的计算

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2 3

2.3

Vy

Lx

2.3.1

2.3.2


2 3


2 3

MESH

C

1M

2E

C

2C3

2

3S

1

4 H


2 3

2C+3

3C+8

F,TF ,pF ,T,p ,V,L,Qzi ,yi ,xi

C5

F,TF ,pF ,zi

C+3

2


2 3

2-4

p,T

Q, V, L, yi, xi

*

p,Q=0

T, V, L, yi, xi

p,Q0

T, V, L, yi, xi

p,L()

Q, T, V, yi, xi

p(T),V()

Q,T(p),L,yi,xi


2 3

Kizi=1,Kizi>1,

T>TB

(ziKi)=1,(ziKi)>1,

T<TD

TB<T<TD

Kizi<1,

(ziKi)<1,


2 3 1

2.3.1

p T

Q, V, L, yi, xi

Ki2C+3


2 3

E

M-

yi ,

L

=

F

V

-

=


2 3

(2-66)


2 67 2 68 s

2-672-68S

2-69

2-70

2-702-69

2-71


2 3

2-71

2-67

2-68

2-65

2-64


2 3

2-712-672-68xiyi2-64V L2-65Q


2 3

2-71

f()

Newton-Raphson

2-72

P602-8


2 3 11

2.3.1

xy

p632-9


2 3 2

2.3.2

p Q0

T, V, L, yi, xi

MESH

T

T


2 3

1

T

T

2

T

T


2 3

T


2 3

A


2 3

BRK


2 3


2 3

AVan-Laar Equ

1

2


2 3

AVan-Laar Equ

3

4

A


B margules equ

BMargules Equ


C wilson equ

CWilson Equ.


2 3

AMargules Equ.

1

2

3


B wilson equation

BWilson Equation

2-1,2-2


2 3

1,,()200004

2. 1988 (01)

3,,, 200104


2 3

4199904

5. , 2004 02

6 ., 2004 03

7.(),2002 03


2 3

8., 200003

9-.,2006 03

10 NaOH-NaAl(OH)4-H2O., 2006 03


2 3

11.;2005

12PSRK., 2005 11

1319913208


2 3

141995152

15[J].(C1),1999,(5)

16., 2004 05

17,,..,2004,


2 3

18 ., 2002 01

19., 2002 01

20913208

2119933170


2 3

221988174217

23,,,,.-. , 199401

24. ., 2004 04


2 3

1

2

1

2

3

4


2 3

3

4TP

5


2 3

122-3

760mmHg

760mmHg

26111213714


2 3


2 3

P-T-KK


2 3


2 3

2


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