Previous in Forum: NDT Requirements and Hydrotest   Next in Forum: Ball Valve Seat Arrangement
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
12 comments
Rating: Comments: Nested
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65

Thin Layer Principle

11/18/2014 3:44 AM

In the Sugar Industry Low Grade Sugar is mxed with water and made as MAGMA and this magma is cured in a CONTINUOUS CENTRIFUGAL MACHINE (Vertical) at a speed of about 1600-1650 RPM in an inclined Basket, of 34 Degree slope.

The magma is fed to the revolving perforated SS basket at the bottom of the basket at the centre and due to centrifugal force the magma raises with a THIN LAYER and dry sugar is thrown out and the viscous liquid known as MOLASSES escaping through the perforations is collected back.

It is said that this type of working is termed as 'WORKING ON THIN LAYER PRINCIPLE"

I tried to google and found a lot , but that talks about CHROMTOGRAPHY.

I request CR4 Members to inform where I can get the details for the working as explained above.

Thanks,

DHAYANANDHAN.S
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Crabtree
Guru

Join Date: Jul 2007
Location: Commissariat de Police, Nouvions, occupied France, 1942.
Posts: 2599
Good Answers: 77
#1

Re: THIN LAYER PRINCIPLE

11/18/2014 3:46 AM

YOU can OBTAIN it FROM the EQUIPMENT manufacturer.

__________________
 Good moaning!
Register to Reply
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#2

Re: THIN LAYER PRINCIPLE

11/18/2014 4:33 AM

Please learn not to shout.

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
adreasler
Guru
Engineering Fields - Electrical Engineering - New Member Fans of Old Computers - Commodore 64 - New Member Popular Science - Evolution - New Member United States - Member - New Member

Join Date: Oct 2013
Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.)
Posts: 3683
Good Answers: 89
#7
In reply to #2

Re: THIN LAYER PRINCIPLE

11/19/2014 9:24 AM

That shouting was a little out of character, even for the 'normally charming' Crabtree.

I suspect that someone swapped his French Roast coffee for English Breakfast, and added some Chicory to the grounds to make it taste like a darker roast.

(With coffee, the darker the roast, the bolder the flavor and the less caffeine. Any coffee blend with 'Breakfast' in the name is a Light Roast, mild flavor, and more caffeine.)

So Crabtree's a bit more irritated because A) he's overcafinated, B) someone switched his French coffee for English coffee, and C) he's still reeling from the horror that he DRANK English coffee.

(Of course, this could all be completely wrong, and little more than ramblings from my own overcafinated mind, but then again, I'm an American, I'm USED to being overcafinated.) ( cue Kubrick Stare ) <-( look it up on tvtropes.com if you're confused)

__________________
 ( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
Register to Reply Off Topic (Score 5)
adreasler
Guru
Engineering Fields - Electrical Engineering - New Member Fans of Old Computers - Commodore 64 - New Member Popular Science - Evolution - New Member United States - Member - New Member

Join Date: Oct 2013
Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.)
Posts: 3683
Good Answers: 89
#8
In reply to #7

Re: THIN LAYER PRINCIPLE

11/19/2014 9:32 AM

Upon further review, I realize that you were referring to the OP's tendency to Caps Lock what he considered important terms, not Crabtree's Caps Locking of every other work.

Crabtree, I apologize if I besmirched your character with my insinuation that you would drink English coffee without realizing it.

__________________
 ( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
Register to Reply Off Topic (Score 5)
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3

Re: THIN LAYER PRINCIPLE

11/18/2014 7:56 AM

<...It is said that...>

Go back to where <...It is said...>, and ask there. Try not to use Caps Lock while asking.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
SHOCKHISCAN
Guru

Join Date: Nov 2007
Location: Eastern Arizona mountains on Route 666 about a mile from God's country
Posts: 1676
Good Answers: 122
#4

Re: THIN LAYER PRINCIPLE

11/18/2014 9:07 AM

Below is a link that may be useful for answering your questions.

As for the "thin layer" catch phrase: It is my understanding that this terminology is referring to the method used for drying the excess sugar extracted during the molasses evaporation process.

http://www.sugar.org/images/docs/refining-and-processing-sugar.pdf

I would also suggest that you do a search on "Thin Layer Molasses Processing" for more information on the subject.

__________________
 They said; "Brain size?" I heard; "Train size?" so I said: "I'll take a small one, thank you."
Register to Reply
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#5
In reply to #4

Re: THIN LAYER PRINCIPLE

11/18/2014 10:29 AM

Dear Mr. SHOCKHISCAN

Thank you for your response.

I am a member in the www.sugar.org and the link given by you gives a simple detail about sugar process/production.

However, the thin layer principle is purely of Engg. aspect.

Let me wait and see.

DHAYANANDHAN.S
Register to Reply
Snel
Power-User

Join Date: Jan 2009
Posts: 250
Good Answers: 7
#6

Re: Thin Layer Principle

11/19/2014 7:23 AM

Hi dhayanandhan

http://books.google.com.br/books?id=LacV6eM2NXMC&pg=PA204&lpg=PA204&dq=thin+layer+flow+sugar&source=bl&ots=q1wfBMO8NY&sig=5FHksLngZpu4-PRjxTkjWNp1LGc&hl=pt-BR&sa=X&ei=O4psVLSCNMHMgwTF_oIg&ved=0CBkQ6AEwAA#v=onepage&q=thin%20layer%20flow%20sugar&f=false

page 204 - a static process is described, but the thin layer concept is clear:

Filtration proceeds by several phases / mechanisms:

phase 1 - sugar xtals in mother liquor, which drains thru gaps between xtals

phase 2 - liquor recedes; xtals covered by thin layer of liquor

phase 3 - thin film drainage

brgds

Snel
Register to Reply
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#9
In reply to #6

Re: Thin Layer Principle

11/20/2014 3:24 AM

Dear Mr.Snel,

Thank you for your reply. Indeed, it is good to read the book.

Any doubt, I will come back to you.

Thanks,

DHAYANANDHAN.S
Register to Reply
James Stewart
Guru
Safety - Hazmat - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Chemical Engineering - Old Hand

Join Date: Mar 2011
Location: Lubbock, Texas
Posts: 14331
Good Answers: 162
#10

Re: Thin Layer Principle

11/20/2014 4:41 PM

The thin layer principle: a thin layer of moisture laden product is faster drying than a big fat gob of it. Can it really be all that hard?

__________________
 If it ain't broke, don't fix it. Just build a better one.
Register to Reply
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#11
In reply to #10

Re: Thin Layer Principle

11/21/2014 3:34 AM

Dear Mr.James Stewart,

Thank you for your response.

It is NOT drying of the mixture. It is the requirement of SEPERATING THE SUGAR CRYSTAL and the LIQUID MOLASSES which is viscous.

DHAYANANDHAN.S
Register to Reply
James Stewart
Guru
Safety - Hazmat - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Chemical Engineering - Old Hand

Join Date: Mar 2011
Location: Lubbock, Texas
Posts: 14331
Good Answers: 162
#12
In reply to #11

Re: Thin Layer Principle

11/21/2014 11:57 AM

Then it is just the centripetal force acting on viscous liquid and solids (crystals) that is at play, with the liquid being squirted out through a mesh? I don't really see this as much more complicated than the spin cycle in your home washing machine.

I suppose things the operator needs to be concerned with is (1) temperature of the mixture you referred to as magma, (2) humidity in the air above the magma, and (3) relative amounts of crystals/molasses in the magma. Once those are more or less nailed down into place, it is just a matter of finding process controls that keep these in balance.

All in all, it sounds like a point in the process that is looking for a reason to become a big sticky mess. Glad I am not working on that.

__________________
 If it ain't broke, don't fix it. Just build a better one.
Register to Reply
Register to Reply
Have a Different Question?
12 comments
Copy to Clipboard

Users who posted comments:

adreasler (2); Crabtree (1); dhayanandhan (3); James Stewart (2); PWSlack (1); SHOCKHISCAN (1); Snel (1); Tornado (1)

Previous in Forum: NDT Requirements and Hydrotest   Next in Forum: Ball Valve Seat Arrangement

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (89 right now)
Show Members
Advertisement