Jump to content



Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

- - - - -

Pinch Analysis In A Batch Process

pinch analysis batch

This topic has been archived. This means that you cannot reply to this topic.
1 reply to this topic
Share this topic:
| More

#1 chemeng_student_stream

chemeng_student_stream

    Brand New Member

  • Members
  • 7 posts

Posted 27 February 2017 - 01:34 PM

Hello, I am currently designing a batch process for production of whisky. I am performing pinch analysis to find ways to optomise heat integration. As you probably already are aware, the dynamic nature of these streams makes the pinch analysis different froma continous processes. I am using the Time slice model but I have a question. To heat the still we are using HP steam in coils, we cant use other streams for this task due to high stream temperature requirment and othe operational concerns such as clogging if using processes streams. My question is that HP steam from coils will come out at high temperatures ( above 70 or 80 deg C), is it worth while using this as to heat other process streams (i.e include it as a  stream in pinch analysis) or should this stream be sent back to the boiler?.

 

The reason I have this doubt is because the boiler load will be lower with a higher input feed temperature of water which i assume will counteract the point of using HP outlet steam to heat other process streams since this will increase the boiler load by the same amount as the heat saved. In such cases, if what I am thinking is right, should I just use HP steam to heat other process streams (i.e not include HP steam outlet as a stream in pinch analysis) and just sent the HP outlet steam back to boiler. Sorry for the long text; any help or expertise on this matter is highly welcomed and appreciated. Thanks 



#2 pavanayi

pavanayi

    Gold Member

  • ChE Plus Subscriber
  • 258 posts

Posted 28 February 2017 - 02:24 AM

Please furnish a PFD for us to understand your process?
In such dynamic instances (Another classic one is dehydrator regeneration), the best possible (and efficient) way to recover energy is a feed-effluent heat exchanger. Its applicability in this particular instance can only be determined from a PFD.
Please include all relevant details in the PFD like temperatures for us to understand available driving forces




Similar Topics