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习题1：

1、 求某一物流的泡、露点

已知LPG的质量分数为：乙烷5％、丙烷65％、异丁烷10％，正丁烷20％，求P为4×105Pa时的该LPG的露点温度，13kg/cm2时该LPG的泡点温度。 2、

项目

Total Flow t/h D（20℃） kg/m3

镏程 BP 10v% 20 v % 30 v % 40 v % 50 v % 60 v % 70 v％ 80 v %

90 v % EP

粗汽油 75 0.7178 ℃ 44 45 54 67 80 92 105 119 136 160 194

该汽油在0.7Mp时的泡点。

某年考试题：如表所示的40℃、75t/h的汽油，需在反应器进行气相降烯烃改质反应以满足汽油排放的环保要求，反应系统压力0.7MPa，现有两股工艺热物流加热汽油，分别是10t/h 的3.5Mpa的中压蒸汽，中压蒸汽的焓值为52.4×104kcal/t，另一物流是温度为180℃，热负荷为650×104Kcal 的化工轻油，请问现有条件能否实现汽油的气相进料，完成降烯烃改质反应。

某年考试题：已知LPG的质量分数为：丙烷25.5％、异丁烷15.0％，正丁烷49.5％，正戊烷10.0%，供气压力为0.15MPa，有些企业为牟取利益，在该LPG中掺混低廉的二甲醚25%出售，当有液体存在时，就会腐蚀垫片，问在该供气压力下掺混二甲醚后的LPG什么条件下会出现腐蚀垫片现象。

某年考试题：下表是我国第二个LNG接收站福建莆田LNG的组成，该LNG来自印尼东固气田，此天然气组成的临界压力PC为50.55bar，求该组成的临界温度。

福建莆田 LNG 组成

组分 Mol%

CH4 96.64 C2H6 1.97 C3H8 0.34 i-C4H10 0.07 n-C4H10 0.08 N2 0.9 某年考试题：1000 kg/hr的纯二氯乙烷(CH2CL-CH2Cl)高温裂解反应生成氯乙烯单体(CHCl=CH2)和氯化氢(HCl)，从反应器出来的裂解气组成：氯乙烯为35.5 mol％、HCl 35.5 mol％，原料二氯乙烷为29 mol％，压力为27kg/cm2的热气体需过冷（过冷度为10℃）经精馏塔来提纯氯乙烯，问该裂解气进分馏塔的温度为多少? 3、

OVHDFEEDCOLUMBTMS

Part A

Perform a rating calculation of a methanol tower using the following specifications:

Feed to column: ? 36.8 wt% methanol ? 63.2 wt% water

? Total flowrate of 120000 lb/hr ? Saturated liquid at 18 psia Column specifications:

? Column tray=38 （exclude condenser & reboiler） ? Feed tray=23

? Liquid distillation and bottoms ? Top-stage pressure=16.1 psia ? Pressure drop per stage=0.1 psia ? Distillate flowrate=1245 lbmol/hr ? Molar reflux ratio=1.3 Part B

Perform a design calculation for the above column. Set up design specifications within

the column so that the following objectives are met:

? 99.95 wt% methanol in the distillate; ? 99.90 wt% water in the bottoms.

To achieve these specs, you can vary:

? The distillate rate from 800 lbmol/hr to 1700 lbmol/hr; ? The reflux ratio from 0.8 to 2. Part C

Perform the same design calculation after specifying a 65% Murphree efficiency for each tray. Assume the condenser and reboiler have stage efficiency of 90%.

How do these efficiencies affect the condenser and reboiler duties of the column? Part D

Perform a tray sizing calculation for the entire column, given that buttle cap tray are used. Number of passes=1;

Tray spacing= 2ft

Fractional approach to flooding less than or equal to 0.8 Part E

Perform a tray rating calculation for the entire column, given that buttle cap tray are used. Number of passes=1; Column diameter=7.5ft Tray spacing= 2ft Part F

Draw heating/cooling curves in the condenser and reboiler.