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Chlorine Compressors

10/22/2007 3:54 PM

We run 3 chlorine compressors in a pulp mill that we have a lot of trouble with. After an overhaul we have to run them on dry air for 2 or 3 days as you cannot put them on chlorine with any moisture in the system. Even with careful checks we still miss some minor leaks that are unacceptable with chlorine. Does anyone know of a a non organic aromatic we could introduce in the dry air stage of start up to pick up these leaks. Thanks, Rex Devantier.

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#1

Re: Chlorine Compressors

10/22/2007 11:08 PM

Ahh, Woody Rapson's old CLO2 paper bleaching agent, that has a tendency to explosively decompose to such a degree that you build the plant to take it. I was a student at Chem Eng when it was developed. It was good and whitened very well.

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#2

Re: Chlorine Compressors

10/22/2007 11:31 PM

the term 'non organic aromatic' is an oxy-moron---tain't no such thing.

First thing is to get all the air out and use dry nitrogen. Chlorine and oxygen react pretty explosively. Now--about how to find small leaks? Pressurize to full operating pressure , apply good 'duct' tape around each bolted flange joint, punch a single hole and put shaving cream foam over the hole, repeat for all potential leaks --use foam alone around any screwed joints (should not be any/many of those.) Any leaks will cause the foam to bubble bubble.

Successful commissioning of these systems requires attention to these kinds of details. NEVER use water inside the system. Get all the rust dust and scale out--acidize and pickle the piping if required to get it clean and debris free. Then keep it that way. Pockets of debris will retain moisture--enough to eat things up.

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#3
In reply to #2

Re: Chlorine Compressors

10/23/2007 3:53 PM

There are several leak detectors that are used for large refrigeration systems. Those refrigerants are usually a chlorine or florine base so there should not be much compatibility issues.

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#4
In reply to #3

Re: Chlorine Compressors

10/23/2007 7:43 PM

Refrigerattion systems use chlorinated andand /or fluorinated hydrocarbons. Mosture there is a grit that wears/plugs at some temperatures.

ClO2 can decompose when in liquid form

http://www.hss.energy.gov/deprep/facrep/workshop2003/presentations/CLO2Explosion-JeffWilliams.ppt

more here.

http://www.google.ca/search?hl=en&safe=off&q=clo2+%2Bliquid+%2Bexplosion&btnG=Search&meta=

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