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回复 simpro 的帖子
PRODUCTS
------------- TOTAL STREAM RATES -------------
MOLES WEIGHT LIQUID VOL NORM VAPOR(1) NUM
STREAM + PHASE KG-MOL/HR KG/HR M3/HR M3/HR SECTION TRAYS
------------ - ---------- ---------- ---------- ---------- ------- -----
S2 L 50.00 3911.36 4.43 1120.70 1 15.85
S3 L 50.00 4601.48 5.28 1120.70
TOTALS 100.00 8512.84 9.71 2241.40 15.85
SPECIFICATIONS
PARAMETER COMP. SPECIFICATION SPECIFIED CALCULATED
TYPE NUM TYPE VALUE VALUE
----------------- ------- ------------- ---------- ----------
STRM S2 MOL RATE 5.000E+01 5.000E+01
STRM S3 2 MOL FRACTION 9.900E-01 9.920E-01
SUMMARY OF UNDERWOOD CALCULATIONS
MINIMUM REFLUX RATIO 1.94533
FEED CONDITION Q 1.62801
FENSKE MINIMUM TRAYS 15.85193
OPERATING REFLUX RATIO 2.00 * R-MINIMUM
TOTAL FEED R/R-MIN M/M-MIN REFLUX DUTY, M*KCAL/HR
TRAYS TRAY RATIO CONDENSER REBOILER
----- ---- ------- ------- ------ ---------- ----------
27 14.08 1.500 1.713 2.918 -1.253E+00 1.697E+00
25 13.04 1.750 1.581 3.404 -1.409E+00 1.853E+00
24 12.31 2.000 1.490 3.891 -1.564E+00 2.009E+00
23 11.78 2.250 1.422 4.377 -1.720E+00 2.164E+00
22 11.36 2.500 1.370 4.863 -1.875E+00 2.320E+00
(1) NORMAL VAPOR VOLUME IS 22.414 M3/KG-MOLE (0 C AND 1 ATM)
NUM 15.85 最小理论板数
M/M-MIN 理论板数与最小理论板数比
回流比越大当然理论板数越小
设计时根据实际情况自己确定,当然还是稍微保险点好
以上为个人意见
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