求助，aspen吸收问题
最近做了氨水吸收SO2的例子，总是出现问题，总是显示Block: ABSROBER Model: RADFRAC
*** SEVERE ERROR
A LIQUID FEED/PUMPAROUND TO THE TOP STAGE IS REQUIRED WHEN
"Q1=0" IS SPECIFIED IN "COL-SPECS"; REQUIRED FEED/PUMPAROUND
HAS ZERO FLOW.
* WARNING
REST OF BLOCK BYPASSED DUE TO SEVERE ERROR.
Block: MIXER1 Model: MIXER
Block: FSPLIT Model: FSPLIT
* WARNING
OUTPUT STREAM "PRODUCT1" HAS STREAM ORDER (1) SPECIFIED,
BUT THE SUM OF SPLIT REACHES 1. THE SPECIFICATION IS TREATED AS
A LIMIT FLOW, AND THE REST OF STREAMS WILL NOT BE PROCESSED.
> Loop $OLVER01 Method: WEGSTEIN Iteration 1
# Converged Max Err/Tol 0.00000E+00
* WARNING IN PHYSICAL PROPERTY SYSTEM
ATTEMPT TO USE MODEL ELECNRTL WITHOUT A SOLVENT.
ACTIVITY COEFFICIENT OF UNITY IS USED
* WARNING IN PHYSICAL PROPERTY SYSTEM
ATTEMPT TO USE MODEL ELECNRTL WITHOUT A SOLVENT.
ACTIVITY COEFFICIENT OF UNITY IS USED
* WARNING IN PHYSICAL PROPERTY SYSTEM WHILE PERFORMING INITIAL ENTHALPY
CALCULATIONS FOR STREAM: "AIR"
ATTEMPT TO CALCULATE ENTHALPY FOR ELECNRTL MODEL WITHOUT A SOLVENT.
Block: OXITATER Model: RSTOIC
Block: SEP Model: FLASH2
Block: MIXER2 Model: MIXER
->Simulation calculations completed ...
***Summary of Errors***
Physical
Property System Simulation
Terminal Errors 0 0 0
Severe Errors 0 0 1
Errors 0 0 0
Warnings 3 0 2
都改了好多次了，就是不知道怎么回事，不知从何下手啊。希望各位高手帮忙看下。
*** SEVERE ERROR
A LIQUID FEED/PUMPAROUND TO THE TOP STAGE IS REQUIRED WHEN
"Q1=0" IS SPECIFIED IN "COL-SPECS"; REQUIRED FEED/PUMPAROUND
HAS ZERO FLOW.
这是你的错误，大概是塔顶回流比的问题，你应该是没有设置。 这只是根据翻译得到的结果啊
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