<font color='black' size='2' face='Arial, Helvetica, sans-serif'>I gave up on any solid or liquid spray cooling/cleaning systems decades ago and developed an electrostatic precipitator that has virtually zero maintenance or pressure drop and insignificant power consumption in comparison to other systems. It has been patented and last checked, no one referred to it in subsequent patent actions. It has unique properties that allow it to operate in a combustible gas stream, low temperature without fouling, and only requires any attention every several thousand hours. it's function can be seen in the video; <a href="http://www.youtube.com/watch?v=h2l05eycnDQ">DOE Tire video</a>
<div>where it is used to clean tire derived gasification gas. There are thousands of hours of operating time on these devices over several sizes and applications,. </div>
<div> To those who want to have success in gasification, this plus the use of specialized gas cooling systems which do not foul is necessary, or else you spend a great deal of time trying to solve problems that already have been solved. <br>
<br>
<div style="clear:both"><font class="Apple-style-span" face="arial">Sincerely,</font><br>
<div><font class="Apple-style-span" face="'Comic Sans MS', sans-serif">Leland T. "Tom" Taylor</font></div>
<div><font class="Apple-style-span" face="Arial, Helvetica, sans-serif">Thermogenics Inc. </font></div>
<div><font class="Apple-style-span" face="Arial, Helvetica, sans-serif">+001-505-463-8422 </font></div>
<div><font class="Apple-style-span" face="Arial, Helvetica, sans-serif">www.thermogenicx.com</font></div>
<div>Skype: </div>
</div>
<br>
<br>
<div style="font-family:helvetica,arial;font-size:10pt;color:black">-----Original Message-----<br>
From: Björn <kuntze@mastergas.de><br>
To: 'Discussion of biomass pyrolysis and gasification' <gasification@lists.bioenergylists.org><br>
Sent: Tue, Oct 31, 2017 6:00 am<br>
Subject: Re: [Gasification] Candle filter experiences<br>
<br>
Dear James,<br>
<br>
I can´t say anything to the flue gas system, but I may be able to<br>
contribute to the filtering of product gas from gasification processes:<br>
<br>
In Germany nowadays most projects use bag filters with working temperatures<br>
of 120 - 160°C. Others use hot gas filtration at around 400°C using<br>
stainless steel mesh filter materials. Wet gas cleaning with oil scrubbers<br>
or electrostatic filters is used in older projects but not common at all for<br>
new projects.<br>
<br>
For fifteen years there were (and there still are) people advertising their<br>
high temperature filter systems (candles like Herding, or BWF and metal<br>
mesh). They claim that these filters can handle tar load. But, according to<br>
my experience, with tar in the gas you will never get happy at all. It is<br>
not even an issue of the filter concept. Due to harmful substances in the<br>
tar you cannot even organize maintenance of such system when following<br>
health and safety regulations. So such filter won´t help you either.<br>
Furthermore, as already stated, once condensing conditions appear, the whole<br>
thing is gone.<br>
<br>
The candles (no matter who is the manufacturer) typically do have a problem<br>
when the dust in the gas is very fine (soot...). In the past the<br>
"overdesigned" filters typically turned out to be "underdesigned" in the<br>
real project with the filter manufacturer saying: "we did not expect that<br>
there is so much fine dust...". So they start with precoating. At the end<br>
some projects had to order a second filter of same size to run in parallel.<br>
I know a few projects where this was the recommended solution. <br>
<br>
So, if you go for that, increase the filter surface right from the beginning<br>
no matter what the manufacturer tells you.<br>
<br>
You might also consider the German company Calida Cleantech GmbH<br>
(<a href="http://www.calida-cleantech.de/en/" target="_blank">http://www.calida-cleantech.de/en/</a>) (formerly LignoGen GmbH). They also<br>
provide hot gas candle filter systems. I know one of their projects in<br>
Germany where they filter product gas quite well. I know that they are<br>
interested in projects filtering pyrolysis gas. You might contact them.<br>
<br>
<br>
Mit freundlichen Grüßen / with best regards<br>
Björn Kuntze<br>
<br>
<br>
MasterGas UG (haftungsbeschränkt)<br>
Bloherfelder Anger 7<br>
26129 Oldenburg<br>
Germany<br>
<br>
Geschäftsführer: Björn Kuntze<br>
<br>
Mobil: +49 (0) 177 345 1557<br>
Email: <a href="mailto:kuntze@mastergas.de">kuntze@mastergas.de</a><br>
Web: <a href="http://www.mastergas.de" target="_blank">www.mastergas.de</a><br>
<br>
Handelsregister: HRB 211272 Amtsgericht Oldenburg<br>
USt-ID-Nr: DE307863882<br>
St.-Nr: 64/213/02649<br>
<br>
----------------------------------------------------------------------------<br>
----<br>
Diese Information ist ausschließlich für den Adressaten bestimmt und kann<br>
vertraulich oder gesetzlich geschützte Informationen enthalten. Wenn Sie<br>
nicht der bestimmungsgemäße Adressat sind, unterrichten Sie bitte den<br>
Absender und vernichten Sie diese Mail. Anderen als dem bestimmungsgemäßen<br>
Adressaten ist es untersagt, diese E-Mail zu lesen, zu speichern,<br>
weiterzuleiten oder ihren Inhalt auf welche Weise auch immer zu verwenden.<br>
Wir verwenden aktuelle Virenschutzprogramme. Für Schäden, die dem Empfänger<br>
gleichwohl durch von uns zugesandte mit Viren befallene E-Mails entstehen,<br>
schließen wir jede Haftung aus.<br>
<br>
The information contained in this email is intended only for its addressee<br>
and may contain confidential and/or privileged information. If the reader of<br>
this email is not the intended recipient, you are hereby notified that<br>
reading, saving, distribution or use of the content of this email in any way<br>
is prohibited. If you have received this email in error, please notify the<br>
sender and delete the email. We use updated antivirus protection software.<br>
We do not accept any responsibility for damages caused anyhow by viruses<br>
transmitted via email.<br>
----------------------------------------------------------------------------<br>
----<br>
<br>
-----Ursprüngliche Nachricht-----<br>
Von: Gasification [<a href="mailto:gasification-bounces@lists.bioenergylists.org?">mailto:gasification-bounces@lists.bioenergylists.org</a>] Im<br>
Auftrag von James Joyce<br>
Gesendet: Dienstag, 31. Oktober 2017 00:48<br>
An: <a href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</a><br>
Betreff: [Gasification] Candle filter experiences<br>
<br>
We are just about to order candles for a flue gas filtration application at<br>
350 deg C. We have also been asked to design a 400 deg C candle filter<br>
system for pyrolysis gas, for installation ahead of a condenser. <br>
<br>
This is one example (not necessarily the supplier we will use)<br>
<a href="http://www.herding.de/files/hGlobal/Downloads/Technical_product_descriptions" target="_blank">http://www.herding.de/files/hGlobal/Downloads/Technical_product_descriptions</a><br>
/ALPHA/UK/Herding_ALPHA_Biomass_Filterunit_uk.pdf <br>
<br>
I have read some of the case studies for larger gasifiers. I am interested<br>
to know what experiences, if any, have been had with candle filters at the<br>
smaller scale (say 2-20 tonnes per day of biomass gasified). Reliability is<br>
my main interest, number of hours between replacement ... and performance as<br>
far as downstream equipment such as condensers and engines are concerned.<br>
<br>
Regards,<br>
<br>
James<br>
<br>
<br>
<br>
_______________________________________________<br>
Gasification mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:Gasification@bioenergylists.org">Gasification@bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenerg" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenerg</a><br>
ylists.org<br>
<br>
for more Gasifiers, News and Information see our web site:<br>
<a href="http://gasifiers.bioenergylists.org/" target="_blank">http://gasifiers.bioenergylists.org/</a><br>
<br>
<br>
_______________________________________________<br>
Gasification mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:Gasification@bioenergylists.org">Gasification@bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</a><br>
<br>
for more Gasifiers, News and Information see our web site:<br>
<a href="http://gasifiers.bioenergylists.org/" target="_blank">http://gasifiers.bioenergylists.org/</a><br>
</div>
</div>
</font>