年产24万吨的苯-甲苯混合液筛板(6)

提馏段：

由u0,min?V0,min/A0?4.4C0(0.0056?0.13(hw?how)?hc)ρL/ρV ，

?LA?hOW?2.84/1000*E??l??

?W?Vs,min?4.4C0A02/3?????lh2.84???hlρl/ρV??E???0.0056?0.13?hw???1000??lw??????2β?4.4?0.772?0.101?6.02??2.84?Ls?3600????0.0056?0.13?0.038??????10002.1???????2.0652.63?13.56Ls2/32/3???792.1?0.002??3.09????

表9漏液线

Ls /(m3/s) Vs /(m3/s)

0.00179 3.47

0.01978 3.93

0.04042 4.25

0.0622 4.50

8.2雾沫夹带线

精馏段：

3.25.7?10?6ev?ζL?ua???H?h??f??T5.7?10?6?20.72?10?3??Vs??1.13?0.0873??HT?Hf????????3.2

ua?VsVs??0.155Vs

AT?Af7.07?0.622HT?hf?0.4?2.5?hw?how?0.305?1.31Ls2/3?2.84?0.4?2.5?0.038??1?1000???3600Ls???1.44????2/3?????

ev?5.7?1020.72?10?3?6?0.155Vs??0.305?1.31L2/3s?2/3????3.2?0.1

Vs?12.42?53.35Ls

表10雾沫夹带线

Ls /(m3/s)

0.00179

0.02346

0.04572

0.0622

Vs /(m3/s) 10.613 7.053 4.324 2.978

提馏段：

5.7?10?6ev?ζL?ua???H?h??f??T3.25.7?10?6?20.72?10?3??Vs??1.13?0.0873??HT?Hf????????3.2

ua?VsVs??0.155Vs

AT?Af7.07?0.622HT?hf?0.4?2.5?hw?how?0.3125?1.31Ls2/3?2.84?0.4?2.5?0.035??1?1000???3600Ls???1.44????2/3?????

ev?5.7?1019.36?10?3?6?0.155Vs??0.3125?1.31L2/3s?2/3????3.2?0.1

Vs?12.46?52.23Ls

表10雾沫夹带线

Ls /(m3/s) 0.00179 0.01978 0.04042 0.0622

Vs /(m3/s) 10.726 7.045 4.021 2.876

8.3液相负荷下限线

精馏段：

对于平直堰，取堰上液层高度how?0.006mm作为最小液体负荷标准

how2.84?1000?3600Ls??E??L?w??2/3a取E=1

3/2Lsmin?0.006?1000??????2.84???2.1?0.001793600

对于平直堰，取堰上液层高度how?0.006mm作为最小液体负荷标准

提馏段：

how2.84?1000?3600Ls??E??L?w??2/3取E=1

3/2Lsmin?0.006?1000??????2.84???2.1?0.00179 36008.4液相负荷上限线

精馏段：

以θ?4s作为液体在降液管中停留时间的下限

θ?AfHT0.622?0.4?0.0622 Lsmax?4Ls

提馏段：

以θ?4s作为液体在降液管中停留时间的下限

θ?AfHT0.622?0.4?0.0622 Lsmax?4Ls8.5液泛线

提馏段：

令HD?KHT?hw

由Hd?hp?hl?hd hp?hc?hl?hζ

??hl?βhL hL?hw?how

联立得KHT?K?β?1hw?β?1how?hc?hd?hζ 忽略ho，将how与Ls，LC与Vs的关系代入上式

????a?Vs?b??c?Ls2?d?Ls2/3 a??0.051?ρV?2??Aolo??ρL?0.051????0.101?6.02?2.1?2??2.88???808.6???0.00012 ??2b??KHT??K?β?1?hw?0.22?0.4??0.22?0.59?0.1?0.038?0.0359

c??0.153/?loho??0.153/2.1?0.22?0.089??4.38

22?3600??3?d?2.84?10E?1?β???L???w?

代数得0.00012Vs222/3?2.83?10?3?3600??1??1?0.59???2.1????2/3?0.645?0.0359?4.38Ls2?0.645Ls2/3

Vs?299.177?36500Ls2?5375Ls2/3

表11 液泛线

Ls /(m3/s)

0.00179

0.02346

0.04572

0.0622

Vs /(m3/s) 14.83 12.49 11.502 10.96

做出筛板负荷性能图

图1 筛板负荷性能图

151413121110987液泛线液相负荷下限线雾沫夹带线654321漏液线0.000.010.020.030.040.050.06Ls(m3/s)提馏段：

令HD?KHT?hw

??液相负荷上限线0.07Vs(m3/s)由Hd?hp?hl?hd hp?hc?hl?hζ

hl?βhL hL?hw?how

联立得 KHT?K?β?1hw?β?1how?hc?hd?hζ 忽略ho，将how与Ls，LC与Vs的关系代入上式

????a?Vs?b??c?Ls2?d?Ls2/3 a??0.051?ρV?2??Aolo??ρL?0.051????0.101?6.02?2.1?2??3.09???792.1???0.000115 ??2b??KHT??K?β?1?hw?0.238?0.4??0.238?0.62?1?0.035?0.0468

c??0.153/?loho??0.153/?2.1?0.024??60.23

22?3600?d??2.84?10?3E?1?β???L???w?

代数得0.000115Vs222/3?2.83?10?3?3600??1??1?0.62???2.1????2/3?0.657?0.0468?60.23Ls2?0.657Ls2/3

Vs?406.95?523739Ls2?5713Ls2/3

表11 液泛线

Ls /(m3/s)

0.00179

0.01978

0.04042

0.0622

Vs /(m3/s) 19.92 17.25 14.56 11.72

做出筛板负荷性能图