Previous in Forum: project   Next in Forum: Directed Light Beams
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
11 comments
Rate Comments: Nested
L.Ramamurthy
Associate

Join Date: Jul 2009
Posts: 42

Triple Effect Evaporator

08/06/2009 11:44 PM

We have a Tripple effect evoperator for evoperating and concentrating Effuluent.We are not getting the desired evoperation. the efficiencey is only about25%. Can anybody help me in improving the operation. does anybody have O&M Manual of similar operation?. Need your help
Register to Reply
Pathfinder Tags: Evoperator
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
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
#1

Re: Tripple effect evoperator

08/07/2009 3:32 AM

Please describe the fall-off of effectiveness over time.

__________________
 "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
L.Ramamurthy
Associate

Join Date: Jul 2009
Posts: 42
#2
In reply to #1

Re: Tripple effect evoperator

08/07/2009 5:33 AM

This is a new plant commisioned in Dec 2008. It is observed that lot of scaling and corsion in parts of pipelines and heatexchangers ue to high flourides in the effuluent
Register to Reply
2
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
In reply to #2

Re: Tripple effect evoperator

08/07/2009 7:33 AM

Then the scaling and corrosion issue needs to be dealt with:

  • Is the equipment still under warranty? What comeback does the operation have on the equipment supplier and its reputation, and how will the supplier protect it?
  • Have the wetted materials been selected correctly for the current process fluids?
  • Have the process fluids changed since the original design?
  • Was the scaling/high fluoride issue available to the designers?
  • Is enough of the pressure-containing materal surviving to make continuation with this equipment worthwhile or does it need renewing with equipment in other materials?
  • Is the scaling as a result of "pushing" the plant operating conditions outside the safe operation envelope available to the design team: i.e. is the heating medium too hot/has someone turned up the voltage applied to electric heaters/etc.?
  • Etc.
__________________
 "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 Good Answer (Score 2)
No more Good Answers.
bioramani
Guru

Join Date: Jun 2009
Location: Bangalore, India
Posts: 725
Good Answers: 24
#4
In reply to #2

Re: Tripple effect evoperator

08/08/2009 3:23 AM

If there is scaling heat transfer will decrease. So does the heat input. The efficiency in terms of energy may not change. Only the throughput will come down.

The other problem may be that evaporation will lead to accumulation of contaminants (Fluorides?) in the bottoms, which can accelerate corrosion.

bioramani

__________________
 bioramani
Register to Reply
L.Ramamurthy
Associate

Join Date: Jul 2009
Posts: 42
#5
In reply to #4

Re: Tripple effect evoperator

08/08/2009 3:32 AM

Thank u Mr Ramani for your comments
Register to Reply
s.udhayamarthandan
Guru

Join Date: Feb 2009
Location: Tamilnadu, India
Posts: 836
Good Answers: 42
#6

Re: Triple Effect Evaporator

08/08/2009 12:22 PM

L.Ramamurthy,

Let me know where is your plant placed. Added to the valuable suggestions of Pwslack and Bioiramani, I would like to ask for more details.

* What is the nature of your effluent water, in terms of type of industry, organic,inorganic contents, pH , TDS levels etc. Do you directly evaporate without neutralizing?

*Is the effluent viscous?

*You are using direct steam out put from boiler for evaporation or combined with production- possible pressure drops.

* What is your boiler fuel.

More the inputs we can sort out collectively.

__________________
 Nature is so graceful and naked. Human possession is ridiculous.
Register to Reply
L.Ramamurthy
Associate

Join Date: Jul 2009
Posts: 42
#7
In reply to #6

Re: Triple Effect Evaporator

08/09/2009 11:51 PM

Dear Mr Active member,

-The effuluent is coffee Effuluent.

- PH 7.

- TDS levels at effecct 1 - 35000

effect 2 - 100000

effect 3 - 500000 and direct discharge to solor evoperation pond.

-The effuluent is Viscous

- Steam line is provoided with Pressure regulating station.

Thanks and regards

L.Ramamurthy
Register to Reply
bioramani
Guru

Join Date: Jun 2009
Location: Bangalore, India
Posts: 725
Good Answers: 24
#8
In reply to #7

Re: Triple Effect Evaporator

08/10/2009 1:41 AM

For a similar application with tea, we used a simple shell and tube heat exchanger and a large spray pond where we arranged a grid of polypropylene shower heads. The heated effluent was sprayed down from a height of about 3 meters above the liquid level. The tea estate had considerable prevailing wind through the year. We got excellent concentration with minimal equipment and low maintenance.The pond fluid was recirculated continuously.

By covering the (separate) solar pond we could achieve an evaporation rate of about 5 ltrs/sq.mtr/normal day in South India.

bioramani

__________________
 bioramani
Register to Reply
L.Ramamurthy
Associate

Join Date: Jul 2009
Posts: 42
#9
In reply to #8

Re: Triple Effect Evaporator

08/10/2009 2:55 AM

Dear Mr.ramani,

Is it possible to share moreproject details like vendor for shower heads etc.

Thankfully your,s

L.Ramamurthy.
Register to Reply
bioramani
Guru

Join Date: Jun 2009
Location: Bangalore, India
Posts: 725
Good Answers: 24
#11
In reply to #9

Re: Triple Effect Evaporator

08/14/2009 2:39 AM

Polypropylene shower heads are available from metroplastech, Coimbatore:

http://metroplastech.com/bathroomaccessories.html

I have sent a msg on your msg board.

bioramani

__________________
 bioramani
Register to Reply
Anonymous Poster
#10

Re: Triple Effect Evaporator

08/13/2009 3:46 PM

necesitas una bomba de vacio para bajar la presion y aumentar la eficiencia de de evaporacion
Register to Reply
Register to Reply
Have a Different Question?
11 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); bioramani (3); L.Ramamurthy (4); PWSlack (2); s.udhayamarthandan (1)

Previous in Forum: project   Next in Forum: Directed Light Beams

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Engineering Projects:
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 (102 right now)
Show Members
Advertisement