Previous in Forum: Missing Manual   Next in Forum: Diesel Engines and Regenerative Power
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
2 comments
Rate Comments: Nested
Anonymous Poster

Cryogenic Cold Box

06/28/2009 11:02 AM

We have a cold box in hydrogen recovery unit. Its performance has declining trend and we want to inspect heat exchangers inside the cold box. If you have experience of their inspection and maintenence pl share.
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
jana_subrata
Associate

Join Date: Jan 2009
Posts: 25
#1

Re: cryogenic cold box

06/29/2009 7:11 AM

Firstly which type of problem you are noticing??

Check the dp. of the Heat exchanger.

write the bottom col. & top col. Pr. diff. , if possible plz. mfg. Co. of the Distilation column with Heat Exchanger ???
Reply
betomachine
Power-User
United States - Member - New Member Engineering Fields - Chemical Engineering - New Member

Join Date: Apr 2007
Location: Austin, TX
Posts: 367
Good Answers: 10
#2

Re: cryogenic cold box

06/29/2009 9:22 AM

Without knowing any details of your process, it will be difficult to suggest anything. Is it a brazed aluminum heat exchanger? Usual suspects in poor heat exchanger performance in a cold box (which I think you are suggesting) would be frozen components plugging the tiny passages in the heat exchanger. These are usually water or CO2 in my experience, but I don't know what your inlet conditions are like. As another poster is suggesting, check the DP across the exchanger as this is a dead giveaway.

Are you not meeting spec on the outlet gas? Are you noticing any car-sized ice balls on the outside of the cold box?

Could you warm it up with dry N2 and run a moisture and/or CO2 analyzer on the nitrogen discharging the unit?

__________________
 Money doesn't talk, it screams in your face.
Reply
Reply to Forum Thread
Have a Different Question?
2 comments

Previous in Forum: Missing Manual   Next in Forum: Diesel Engines and Regenerative Power

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 (75 right now)
Show Members
Advertisement