Heat Integration without Condenser and Reboiler

[nur faiqa]

Salam/Hi,

Attached is the heat integration files after not considering reboiler and condenser as part of the heat integration.

If I remember correctly, madam did suggest to do heat integration with the utility stream.

But the one attached is just reboiler and condenser stream being omitted.

Please check and advice. 

Thank you :)

[nur faiqa]

as tamil has point out the reactor 2 should have higher temperature,
so the HEN posted is not the final one

but more or less is should look like that..

[Balqees Zailani]

Ouh ok. I didnt notice that the reaction took place at 135 degc. ok so we have to add it into HI. 

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[TAMILARASAN MUNIANDY]

dear faiqa n balqees 

plz refer to the hysys file for the stream reference... ans also plz notice the excel file... in that file i have suggestion on wat stream to be included as energy stream to be integrated.... plz gtalk me if there is any doubt

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Warm Regards

Tamilarasan Muniandy

Tel: (6017) 457 1573

Email: ara...@gmail.com

Bachelor of Engineering (Hons) Chemical
Universiti Teknologi PETRONAS
Perak Darul Ridzuan
Malaysia.

[TAMILARASAN MUNIANDY]

Stream Cold 4 is not applicable.... plz omit them.... 

[TAMILARASAN MUNIANDY]

btw going for painball now .. anything caal me... will be around at night 9 pm

[nur faiqa]

i don't know how to figure out the temperature of hot utility.

need to look at the condenser temperature?

[TAMILARASAN MUNIANDY]

refer to the hysys print out for stream information.. i did some calcuation plz refer it n let me know.. thanks

[nur faiqa]

dear team members :)

please check the data. any suggestion or justification for heat integration? HEN is yet to be completed because i'm not sure if everything is correct.

based on the attached file, we have a threshold problem, with pinch at 929.9 deg C with no hot utility and around 55051.9 kW cold utility.

tamil, i can't find the area of heat exchanger, so for easiness i just choose cooling water due to availability of data. or we must use chilled water?

for hot utility of reboiler, i choose LP steam as according to the references i found, they use LP steam.

[nur faiqa]

can not consider utility for reboiler and condenser as part of the heat integration

- heat duty of the utility has already been used up for heating/cooling in the reboiler/condenser

reactor cooling

- the reactor is exothermic resulting in temperature of 934.9 C, but this needs  to be cooled down to 350 C for safety/material specification so need cold utility. 

- Due to the nature of the reactor, if we directly include this ‘stream’ to be cooled down into the heat integration, it will be very complicated later in the equipment design stage. 

- Usually reactor has its own cooling system, like a molten salt loop. However, if the molten salt loop is to be included in the heat integration, then that is possible. But, this can only be known after the design stage is completed. So maybe no need to put in heat integration? (Refer example 19.1, pg 435 Robin Smith)

[TAMILARASAN MUNIANDY]

dear guys as per HEN this is the revised PFD.... any comments plz suggest

[General Grievous]

there is a lot of problems with this thread.
I guess most of the disagreement comes from the stream data extraction(including me).
I believe we need to agree on the data extraction then u guys can make energy targeting.

Felisberto Muchapa
Universiti Teknologi PETRONAS
Chemical Engineering Department
H/P No:+60149048782
Proudly MY_MOZ.