Date: Tue, 10 Feb 1998 14:01:24 -0800
I am seeking advice from someone who may have discovered a way to effectively control emissions from a HAL. We have a horizontal unit which is exhausted to an electrostatic precipitator (ESP) and then through a water fume scrubber. We are having a very difficult time with keeping the ESP operational because the acid in the flux deteriorates the collection cells, causing electrical shorts in the unit. The networking we have done indicates that others are having similar problems. Does anyone have a success story to share? I can also be contacted at 619.513.2200
Thanks for the assistance,
Date: Wed, 11 Feb 1998 07:16:37 -0500
WE RUN OURS THROUGH A SIMPLE WATER SCRUB AT A SLIGHTLY ELEVATED pH AND
HAVE HAD NO PROBLEMS. WE DO NOT USE AN ESP. YOU MIGHT WANT TO TRY
BYPASSING THE ESP UNIT WITH THIS PARTICULAR AIRSTREAM.
Date: Wed, 11 Feb 1998 07:21:38 -0800
We have only a water scrubber installed on our HASL line. We put it in
several years ago. We haven't source-tested it, but it seems to be
working very effectively, judging by the condition of the roof.
Date: Wed, 11 Feb 1998 10:27:06 -0500
Steve and others:
In the October, 1996 issue of Circuitree, Mostafa Pournejat and Kenneth Schifftner wrote an article entitled, "Opacity and Odor Control for Hot Air Solder Leveling Operations." The article addressed new pollution prevention control options for that process. Zycon had been using wet electrostatic precipitatirs and found that the units were not effective at eliminating odors. They switched to a patented fluidized bed gas absorber followed by a fiberbed filter which was successful at dealing with emission and odor problems.
Steve -- I will fax you the article.
Regards,
Holly Evans
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From: Steve Ward
Subject: Hot Air Leveling and emissions control
Steve Ward
Hallmark Circuits, Inc.
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From: "Brown, Cyndi"
Subject: Re: Hot Air Leveling and emissions control
X-To: Steve Ward steve_ward@HALLMARKCIRCUITS.COM
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From: "Sharp, John"
Subject: Re: Hot Air Leveling and emissions control
Steve,
John Sharp
Merix Corporation
Forest Grove, OR
503-992-4351 Telephone
503-359-1040 FAX
john.sharp@merix.com
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From: Holly Lynch
Subject: Re: Hot Air Leveling and emissions control
Director of Environmental and Safety Programs
IPC
1400 Eye St., N.W., Suite 540
Washington, D.C. 20005-2208
ph: 202-638-6219
fx: 202-638-0145
e-mail: HollyEvans@ipc.org