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| Bioenergy Archive for January 2001 |
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| 74 messages, last added Tue Oct 22 18:31:41 2002 |
[Date Index][Thread Index]
Re: Biogas demisting before combusion
Date: Tue, 9 Jan 2001 13:40:26 -0000
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Biogas demisting before combusionChris,
Designing biogas pipelines has my bread and butter work for a couple of =
decades. The problem you are facing occurs in about a quarter of all =
digesters I am called to rescue!
You may need to look further than your spec. below suggests - can you =
please call me on my mobile cellphone in the UK +44 07831 728 418 =
(I am not sure if you need to drop the zero before the number). There =
is an answering machine on this line which will be switched off if I am =
on a digester roof.
Best Regards
Dr. Les Gornall
Director
Practically Green Environmental Services
www.practicallygreen.com
Currently commissioning Ford Works 29Megalitre/day WTW, headworks, =
sludge treatment centre, 6000 m3 mesophilic digesters and sludge drying =
plant for Paterson Candy PLC.
----- Original Message -----=20
From: Attwood, Chris=20
To: 'bioenergy@crest.org'=20
Sent: Monday, January 08, 2001 1:14 AM
Subject: Biogas demisting before combusion
Hi All,=20
Wonder if anyone can give me some help with a small problem we are =
having with our biogas boiler.=20
We have recently completed a 1ML/day anaerobic/aerobic industrial =
effluent treatment plant. We are currently using a portion of the biogas =
produced to fuel a hot water boiler to maintain the main reactor temp at =
+35=BAC.
The biogas is scrubbed by a caustic scrubber but still has a small =
residual H2S component of around 0.1%.=20
What seems to be happening is that the biogas is carrying a large =
amount of entrained liquid, either from the scrubber or condensate =
dropping out from the biogas as it cools in the pipeline after being =
heated by the reaction in the caustic scrubber.
The entrained liquid despite a line drain is apparently causing the =
boiler to "flame out" occasionally, at least that is what the boiler =
supplier is insisting.
What I need is a liquid / gas separator or demister for a gas flow of =
around 80m3/hr. Preferably with a mechanical automatic drain to prevent =
any complications with hazardous area certification. The materials =
should be able to handle the small H2S component without corrosion.
So if anyone can point me to a supplier or designer I would appreciate =
it.=20
Thanks in advance=20
Best regards,=20
Chris Attwood=20
Senior Project Manager.=20
Burns Philp=20
Technology & Development=20
ABN 85 003 994 241=20
chris.attwood@burnsphilp.com=20
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Chris,
Designing biogas pipelines has my bread = and butter=20 work for a couple
of decades. The problem you are facing occurs in = about a=20 quarter of
all digesters I am called to rescue!
You may need to look further than your = spec. below=20 suggests - can you
please call me on my mobile cellphone in = the=20 UK +44 07831 728
418 (I am not sure if = you need=20 to drop the zero before the
number). There is an answering = machine=20 on this line which will be
switched off if I am on a digester = roof.
Best Regards
Dr. Les Gornall
Director
Practically Green Environmental=20 Services
<3d.htm>www.practicallygreen.<3d.htm>com
Currently commissioning Ford Works = 29Megalitre/day=20 WTW, headworks,
sludge treatment centre, 6000 m3 mesophilic digesters = and sludge=20
drying plant for Paterson Candy PLC.
----- Original Message -----
Attwood, Chris
To: <3d.htm>'bioenergy@crest.<3d.htm>org'
Sent: Monday, January 08, 2001 = 1:14=20 AM
Subject: Biogas demisting = before=20 combusion
Hi All,
Wonder=20 if anyone can give me some help with a small problem we are
having = with our=20 biogas boiler.
We have recently = completed a=20 1ML/day anaerobic/aerobic industrial
effluent treatment plant. We are=20 currently using a portion of the biogas
produced to fuel a hot water = boiler to=20 maintain the main reactor temp
at +35=BAC.
The biogas is scrubbed by a caustic = scrubber but=20 still has a small
residual H2S component of around 0.1%. =
What seems to be happening is that the biogas is = carrying a=20 large
amount of entrained liquid, either from the scrubber or = condensate=20
dropping out from the biogas as it cools in the pipeline after being =
heated by=20 the reaction in the caustic scrubber.
The entrained liquid despite a line = drain is=20 apparently causing the
boiler to "flame out" occasionally, at least = that is=20 what the boiler
supplier is insisting.
What I need is a liquid / gas separator = or demister=20 for a gas flow of
around 80m3/hr. Preferably with a mechanical = automatic drain=20 to
prevent any complications with hazardous area certification. The =
materials=20 should be able to handle the small H2S component without =
corrosion.
So if anyone can point me to a supplier = or designer=20 I would appreciate
it.
Thanks = in=20 advance
Best regards, =
Chris Attwood =
Senior Project Manager.
Burns Philp =
Technology & Development
ABN 85 003 994 241
chris.attwood@burnsphilp.com=20
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