化工原理 塔计算流程 (最终)

气相密度ρv 27.9kg/m 3液相表面张力σ 4.09液相密度ρ

l

449.8

kg/m 3摩尔质量

43.96

计算过程

气相流量q vvs 0.24m 3/s 863.916液相流量q vls

0.0154

m 3/s

55.267

两相流动参数F LV 0.257642262

a.粗估塔径

初选板间距H T 0.45m C 200.06

气体负荷因子C 0.043680733

泛点率取值0.8液泛气速u f

0.169860569m/s

操作气速u 0.135888

气体流道截面积A 1.766154454m 2

1.766154454

A d /A T =0.12

A/A T =0.88

塔板截面积A T = 2.006993697m 2

塔径D= 1.598556782

取实际塔径为

D=1.6

m

所选塔板尺寸为

塔板截面积A T = 2.010619264m 2

降液管截面积A d =0.241274气体流道截面积A 1.769344952m 2

实际操作气速u 0.135643

泛点率0.798557433

液泛气速uf 0.169861

0.08边缘宽度b c =0.05

0.16

故降液管b d =0.271

x=0.449

r=0.75

1.261537

取筛孔直径d 0=0.0060.024

开孔率υ=0.0566875

0.071513393筛孔气速u 0= 3.356014735筛孔个数n=2529

选取塔板厚度δ＝0.0040.07

0.75

堰长l w =1.2

溢流强度=

液头高度h ow =0.036566185m 取底隙h b =0.04

c.塔板校核

取堰高h w =由A d /A T =0.12，查图得l w /D=b.塔板布置和其余结构尺寸的选择

1.80MP ，326.15K 下的物性参数：

选取单流型、弓形降液管塔板筛孔总截面积A 0=取进出口安定区宽度bs=bs`=根据A d /A T =0.12,可查得b d /D=有效传质区面积Aa=筛孔中心距t=

1.液沫夹带量e v

flv

0.007

0.257642262

0.8

e v =0.007292451kg 液体/kg 气体

由式（6.10.16）有

e v =0.000529117kg 液体/kg 气体

2.塔板阻力h f

(1)h 0的计算因为，d 0/δ=1.5

0.80所以，h 0=0.055635692m 液柱

(2)h 1的计算

由u a =0.157060802m/s

气体动能因子Fa ＝0.829602

查得充气系数β＝0.7

所以，h 1=0.07459633

m 液柱

(3)h δ的计算

h δ＝0.000617936所以，h f ＝

0.130849958m 液柱

h d ＝

0.015643406

m 液柱

则，H d =0.253059549m 液柱取降液管中Φ=0.6则：

H`d =0.421766τ＝7.050223393s >5s

3-3严重漏液校核

h`0=0.0188356681/k=0.581854k= 1.718645216> 1.5-2.0u o `= 1.952709439m/s

d.负荷性能图1.过量液沫夹带线

q vvh =24207.61221 * (0.275－q vvh =6657.093357

－

152.2028571

* q vlh 2/3

2.液相下限线

q vlh =

3.684

m 3

/h

3.严重漏液线

a ＝3661.62033b=0.014082

c=0.000326768q vvh =502.365823

4.液相上限线

q vlh =78.17287698

5.降液管液泛线

a`=7.45529E-08

b`=0.193

由F lv =0.258和泛点率＝0.799，得ψ＝所以查得C 0=h 0+h 1+h δ ＝

3-1降液管液泛校核

m < H T +h w =

3-2液体在降液管中的停留时间τ

c`= 5.12153E-06d`=0.00427543 q vlh 1.q vvh 2.qvvh 3.qvvh 4.qvvh 5.qvvh 06657.093357502.36581608.965 56212.049503502.36581555.43 105950.630275502.36581521.747 155731.364836502.36581491.479 205535.653118502.36581462.446 255355.777234502.36581433.707 305187.590929502.36581404.726 355028.541841502.36581375.137 604324.403656502.36581209.355 704071.928967502.36581130.533 803831.241029502.36581041.332 903600.405128502.3658938.4098 1003377.982205502.3658816.2622

3.6840

3.6841800q vlh q vvh

78.17287698055.267863.916

78.17287698130000

kg/kmol

hl0.075 m/s

lw/D0.75

m2Ad/AT=0.12 m/s Array

46.05583

0.52

0.006287 * q vlh2/3)

$C$72*(F72+C73*A81^(2/3))^(1/2)

C72*(F72+C73*(C7*3600)^(2/3))^0.5

434.5167 449.0159 457.3184 464.1677 470.1969 475.6709 480.7328 485.4711 505.9157 513.0479 519.756 526.1091 532.159