The Light Green Machine Institute
Weekly
Check out Nip Impressions weekly
Nip Impressions´┐Ż is Paperitalo Publications' flagship publication.  Published every Thursday afternoon (US Eastern Time), Nip Impressions´┐Ż is eagerly read by pulp and paper professionals around the world.


3 June 15: Back to the future: steel dryers

One of the first topics we ever discussed at the Light Green Machine Institute was steel dryers.  This was way back in 2009.

 

I thought I would give you an update.

 

The superiority of steel (and actually, aluminum would be even better) over cast iron as a dryer shell material is indisputable. Strength, safety and heat transfer are far superior.  Increased heat transfer means fewer dryers and shorter machines which has a multiplying effect on reducing costs.

 

So where are we?

 

Andritz claims to have received their 10th order for a steel yankee.

 

Toscotec claims to have made 100 steel yankees and over 1,000 steel dryer cans since the 1960s.

 

If anyone else has any production records in this area, let us know and we will publish them.  We want to give this subject all the publicity we can.

 

There is no excuse any longer to be using cast iron dryers in new or rebuild applications.  In my opinion, cast iron dryers continue to be produced for new machines solely because of the costs machine manufacturers have sunk in casting facilities.  

 

Think about it, with all the materials we have available today, why on earth would you make a pressure vessel out of cast iron? This is not 21st century technology, it is 19th century technology.

 

Your thoughts? 

We would like to hear from you. Please send an email to [email protected] 

with "LGMI Frontiers" in the subject line. 

  

Comment from last week:

  

 

Interesting approach.  I would add that when a rebuild project is executed, take out the redundant piping , controls and wiring and add them to your inventory of "spares" or sell them.   Far too often, this stuff is left in place "just in case" or to rot.  This complicates any future rebuild and adds unnecessary cost and complication to the next project.  In a lot of cases, the cost of removal can be offset by the scrap value during the execution of the rebuild.

 

Once done, make sure your layouts and process/mechanical documentation is updated by your local college over the next few months.  Having an engineering firm do this as part of the next rebuild is expensive.

 

Regards,


Bryan Creagan
KSH Consulting
Montreal, PQ
Canada
 

 

 

LGMI Design Practices
LGMI DESIGN PRACTICES ARE NOW AVAILABLE! 
  
As always, your comments will be appreciated.
Think light!

 

Brian Brogdon, Ph.D.
Executive Director

 

or

 

Jim Thompson
Founder
_____ 

Send us your comments by emailing Brian Brogdon
or Jim Thompson!

 

Disclaimer


 

LGMI Weekly Ideas are presented for your consideration and inspiration only.  It is solely your responsibility to check for engineering correctness, applicability, standards, insurance policy and local, national or any other legal compliance required before implementing.  Neither The Light Green Machine (TM) Institute, Paperitalo Publications, Talo Analytic International, Inc., nor any individual associated with these entities accepts any responsibility for your application or compliance issues.


 



The Light Green Machine Institute is a stand-alone non-profit Delaware Corporation.  
 
 

Copyright 2015 LGMI All Rights Reserved