Thank you for your answer. However I have one more question..... I try to correlate the configuration in 7:26 with the configuration of 0:28. My question is: You add a compressor in the top of the distillation in order to increase the temperature of the overhead stream and to use this heat in order to heat the reboiler. However I'm struggling a bit about the temperatures. If I see the figure in 0:28, in which the heat exchanger has replaced the condenser and the reboiler, the inlet temperature of the hot stream in the condenser will be the 117oC, which is the outlet temperature of the compressor and the outlet stream of this hot stream will be 80oC. This hot stream will give its heat to the reboiler stream, which is the cold stream. But here is my problem what will be the inlet temperature of the cold stream to the heat exchanger, as it is depicted in 0:28 and what it will be the outlet temperature of this cold stream in the heat exchanger. I would like to mention that as hot stream I mean the stream that is going through the condenser and as cold stream the stream that goes through the reboiler. And my final question the outlet of the heat exchanger will be in the liquid phase??? Thank you in advance!!
Since the bottoms stream is almost a pure substance, the phase change (from liquid to vapor) will occur with almost no change in the temperature of the stream. For more details, please create a user at lvpp.nuvem.ufrgs.br:8080/ and run yourself the last example (called 'Vapor Recopression Distillation'). There you will find this process with industrial data for the propylene/propane separation and you will be able to see all the temperatures, compositions, flows, etc.
First of all thank you for your nice and so practical explanation for the heat integration of a distillation column. But I would like to ask you the top product (distillate) that u add in the compressor is in the vapor phase right? not the stream after the condenser, which is in the liquid phase? Thank you in advance!
Correct, in this case you get the vapor phase leaving the top stage and compress it. When entering the compressor you will have a vapor (saturated or near to that - depending on the pressure drop before the compressor), it will be then overheated during the compression.
First select the distillation column. Then, in the variables panel select the composition you want to plot (either liquid x or vapor y) and press the "View Chart" button. This is also shown in the following video ruclips.net/video/Pqu_OZ5YceQ/видео.html
Sorry, I misread your question. You can create a composite curve by using the liquid and vapor enthalpies combined with the molar flows. Use the "Copy values" button instead of the "View Chart". We just updated the column model so that the enthalpies are exposed to the user. This is now available for testing at lvpp.nuvem.ufrgs.br:8080/
Hai. Curently i am working on a simulation related to MVRC. I would like to know more about your software. Can i have your email so that i can clarify some of my doubts.
Thank you for your answer. However I have one more question..... I try to correlate the configuration in 7:26 with the configuration of 0:28. My question is: You add a compressor in the top of the distillation in order to increase the temperature of the overhead stream and to use this heat in order to heat the reboiler. However I'm struggling a bit about the temperatures. If I see the figure in 0:28, in which the heat exchanger has replaced the condenser and the reboiler, the inlet temperature of the hot stream in the condenser will be the 117oC, which is the outlet temperature of the compressor and the outlet stream of this hot stream will be 80oC. This hot stream will give its heat to the reboiler stream, which is the cold stream. But here is my problem what will be the inlet temperature of the cold stream to the heat exchanger, as it is depicted in 0:28 and what it will be the outlet temperature of this cold stream in the heat exchanger. I would like to mention that as hot stream I mean the stream that is going through the condenser and as cold stream the stream that goes through the reboiler. And my final question the outlet of the heat exchanger will be in the liquid phase??? Thank you in advance!!
Since the bottoms stream is almost a pure substance, the phase change (from liquid to vapor) will occur with almost no change in the temperature of the stream. For more details, please create a user at lvpp.nuvem.ufrgs.br:8080/ and run yourself the last example (called 'Vapor Recopression Distillation'). There you will find this process with industrial data for the propylene/propane separation and you will be able to see all the temperatures, compositions, flows, etc.
Thank you for your help.
First of all thank you for your nice and so practical explanation for the heat integration of a distillation column. But I would like to ask you the top product (distillate) that u add in the compressor is in the vapor phase right? not the stream after the condenser, which is in the liquid phase? Thank you in advance!
Correct, in this case you get the vapor phase leaving the top stage and compress it. When entering the compressor you will have a vapor (saturated or near to that - depending on the pressure drop before the compressor), it will be then overheated during the compression.
How to reduce the amount of vapor at the top of the column? The type of trays, their efficiency? I am asking for an answer and best regards.
Hello I would like to ask you if it is possible to plot also the composite curves for the distillation column?
First select the distillation column. Then, in the variables panel select the composition you want to plot (either liquid x or vapor y) and press the "View Chart" button. This is also shown in the following video ruclips.net/video/Pqu_OZ5YceQ/видео.html
In the video you sent me, I cannot see how the plot T-H (composite curve) is generated.
Sorry, I misread your question. You can create a composite curve by using the liquid and vapor enthalpies combined with the molar flows. Use the "Copy values" button instead of the "View Chart". We just updated the column model so that the enthalpies are exposed to the user. This is now available for testing at lvpp.nuvem.ufrgs.br:8080/
When you press the "Copy values" button the variable data is copied to your clipboard, then you can paste the data in a spreadsheet.
Which of the three videos describe the plot of this graph T-H? Thanks for the answers!!
Also what will be the temperature in the stream 8 when the video starts at 0:27?
This temperature will be around 110 C. Please see the bottom temperature at 3:07.
which software are u use...?
I'm using the iiSE simulator. For testing/academic purposes use the web-based version, check www.iise.ltd/
Hai. Curently i am working on a simulation related to MVRC. I would like to know more about your software. Can i have your email so that i can clarify some of my doubts.
Please contact us at www.iise.ltd