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content: Dear Cheresources;
I am currently trying to do a plant test on switching process water to stripper bottom to do solid scrubbing in an absorber. Previously, it was believed that using stripper bottom will create foaming in hte absorber. I would like to know how can the operations tell from the DCS or the control panel if foaming is happening during the test run? THis is to enable them to know there is foaming in advance before its too late. Is there something that will show in the pressure or temperature data if foaming has occured?
Hope you can help me with this. Thanks.
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Foaming In Absorber
Started by Guest_kongsl_*, Jun 12 2003 09:12 PM
5 replies to this topic
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#2
Guest_sudeb_*
Guest_sudeb_*
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Posted 15 December 2003 - 02:25 AM
hii
in any gas liquid mass transfer phenomena foaming is bound to happen..
anyway, that can be easily tracked from increse in Differential pressure (DP) reading in DCS. for excessive foaming occurences a continuousaddition of antifoam can be kept
in any gas liquid mass transfer phenomena foaming is bound to happen..
anyway, that can be easily tracked from increse in Differential pressure (DP) reading in DCS. for excessive foaming occurences a continuousaddition of antifoam can be kept
#3
Guest_Ash_*
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Posted 21 January 2004 - 09:11 AM
Hi
The increase in pressure drop is very sudden and erratic. The pressure drop flutuates violently and if no action is taken you can have a serious carryover problem.
Apart from addition of antifoam, the first action is to back-off from the feed rate to control the foaming.
The increase in pressure drop is very sudden and erratic. The pressure drop flutuates violently and if no action is taken you can have a serious carryover problem.
Apart from addition of antifoam, the first action is to back-off from the feed rate to control the foaming.
#4
Scanguy
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Posted 02 February 2004 - 12:29 PM
You can perform a towerscan on it while performing your test. This can give you real time data as to the extent of the foaming during the test which can be relayed to the control room. The following is a real sample of a foaming tower. Similar information can be seen in packed beds as well.
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Foaming.JPG 319.66KB
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#5
Kameswara Rao
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Posted 28 April 2004 - 01:43 PM
In any gas liquid mass transfer phenomena foaming is bound to happen..
anyway, that can be easily tracked from increse in Differential pressure (DP) reading in DCS. for excessive foaming occurences a continuous addition of antifoam can be kept through metering pump.
The overhead knock out drum also should have raising and high level alarms.
anyway, that can be easily tracked from increse in Differential pressure (DP) reading in DCS. for excessive foaming occurences a continuous addition of antifoam can be kept through metering pump.
The overhead knock out drum also should have raising and high level alarms.
#6
doolie
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Posted 09 November 2004 - 02:38 AM
greetings. our co2 absorber has delta p transmitters across each packed bed and tray section. as well as over-all delta p's. additionally, the quench and wash water streams we use to cool/clean the process gas with are monitored for conductivities.
yes i realize there is a long time gap between now and the last post.
yes i realize there is a long time gap between now and the last post.
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