<div style="font-family:arial;color:black;font-size:10pt;"><span style="display:inline-block" contenteditable="false"></span></div>
<div> <font class="Apple-style-span" color="#000000" face="arial"><span class="Apple-style-span" style="font-size: small;">Tom, </span></font></div>
<div><font class="Apple-style-span" color="#000000" face="arial"><span class="Apple-style-span" style="font-size: small;"><span class="Apple-tab-span" style="white-space:pre"> </span>Thanks for the compliment and appreciation. There were hundreds of "pot" trials using a wide variety of treatments, extractions, etc. before the key process was accidentally stumbled on. Other processes have evolved and include the ability to take sea-water to potable with a fraction of the cost of distillation or RO. </span></font></div>
<div><font class="Apple-style-span" color="#000000" face="arial"><span class="Apple-style-span" style="font-size: small;"><span class="Apple-tab-span" style="white-space:pre"> </span>Assumptions about the tar properties including specific gravity can be quite misleading. </span></font></div>
<div><font class="Apple-style-span" color="#000000" face="arial"><span class="Apple-style-span" style="font-size: small;"><span class="Apple-tab-span" style="white-space:pre"> </span>One aspect of how to deal with the produced water from a gasifier is to give it the right type of compound definition and once that is reached, it makes it much easier to treat it. </span></font></div>
<div style="font-family:arial;color:black;font-size:10pt;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>
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-----Original Message-----<br>
From: Tom Miles <tmiles@trmiles.com><br>
To: 'Discussion of biomass pyrolysis and gasification' <gasification@lists.bioenergylists.org>; 'Pete & Sheri' <spaco@baldwin-telecom.net><br>
Cc: gasifiers <gasifiers@bioenergylists.org>; biochar <biochar@yahoogroups.com><br>
Sent: Wed, Jan 6, 2016 7:05 pm<br>
Subject: Re: [Gasification] SPAM: Re: Characterization of waste water from biomass gasification equipment: A case-study from Cambodia<br>
<br>
<br>
<div id="AOLMsgPart_0_93e40ef6-6520-4e9a-b9fe-b1d7da9e973f" style="margin: 0px;font-family: Tahoma, Verdana, Arial, Sans-Serif;font-size: 12px;color: #000;background-color: #fff;"> <br>
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<pre style="font-size: 9pt;"><tt>Thanks, Doug. <br>
<br>
Corrected link Link <a target="_blank" href="http://www.fluidynenz.250x.com/">http://www.fluidynenz.250x.com/</a> <br>
<br>
A typical solution seems to be to clean as much as you can from the black <br>
water and then burn off what you can't separate with activated carbon. <br>
Gasifier char has been shown to be a pretty good filter. <br>
<br>
Once suggestion has been to heat the liquid to 100C to vaporize the <br>
benzenes, etc. and then use the steam to gasify the char. Another has been <br>
to use vapor compression techniques. We quickly get into tech heavy <br>
solutions that go beyond the cash flow of a small scale gasifier project. <br>
One scrubber supplier told me that they won't touch developing scrubbers for <br>
small gasifiers unless you have a minimum of $150,00 to spend on <br>
development. They find most developers of small scale gasifiers don't have <br>
enough money for development of appropriate gas cleaning systems, not to <br>
mention black water cleanup. You have to appreciate the development work <br>
that Tom Taylor has done. <br>
<br>
Tom <br>
<br>
-----Original Message----- <br>
From: Gasification [<a href="mailto:gasification-bounces@lists.bioenergylists.org?">mailto:gasification-bounces@lists.bioenergylists.org</a>] On <br>
Behalf Of Doug Williams <br>
Sent: Wednesday, January 06, 2016 5:30 PM <br>
To: Pete & Sheri <<a href="mailto:spaco@baldwin-telecom.net">spaco@baldwin-telecom.net</a>> <br>
Cc: 'Discussion of biomass pyrolysis and gasification' <br>
<<a href="mailto:gasification@lists.bioenergylists.org">gasification@lists.bioenergylists.org</a>>; <a href="mailto:biochar@yahoogroups.com">biochar@yahoogroups.com</a>; <br>
<a href="mailto:gasifiers@bioenergylists.org">gasifiers@bioenergylists.org</a>; 'Doug Williams' <<a href="mailto:doug.williams.nz@gmail.com">doug.williams.nz@gmail.com</a>> <br>
Subject: SPAM: Re: [Gasification] Characterization of waste water from <br>
biomass gasification equipment: A case-study from Cambodia <br>
<br>
Hi Pete, <br>
You ask: <br>
<br>
> So---- what if one allowed the scrubber water to sit still for a <br>
>couple of days? Would most of the "condensible hydrocarbons" and the <br>
>tar rise to the top? (I assume that most that "bad stuff" isn't water <br>
>soluble.) <br>
<br>
Heavier tars float but a lot goes into solution and that's the stuff usually <br>
containing benzine and other nasties that are difficult to filter. <br>
<br>
>Then, could that top layer be sucked off, making for a concentrate that <br>
>might be easier to deal with? And, would the remaining "water" be <br>
>useful in the >scrubber again? <br>
<br>
Basically this is how the systems are managed, but the condensate is <br>
carcinogenic and hard not to be exposed to it over a period of time. <br>
Depending on what the condensible is, and there are huge variations, it can <br>
be just very light pyrolysis oil without black tars, or the whole spectrum <br>
of what is commonly referred to as stack gases. These are a very unstable <br>
mix of distillates, and over 200 chemical combinations have been identified. <br>
They don't all survive to condense, but the outcome is the same of creating <br>
toxic black liquor. Sawdust will mop up pyrolysis oils, and the more <br>
activated chars after gasification, can be used to filter "some black <br>
liquor", but having said that, you do need lab analysis to be sure of the <br>
outcomes. <br>
> <br>
> My reason for asking the original question is this: <br>
> I have been testing a JXQ-10 for several years now. I can get it to <br>
>make enough gas to run an Onan 6.5KW genset for up to about 4 hours per <br>
>batch, at > about 3KW net, max.. The thing that always ends the run is <br>
>when the reactor is full of wood chips to the top. <br>
<br>
To give you a correct answer, I would need a step by step procedure of <br>
starting it up and operating it over the four hours. It sounds like an open <br>
core principle burning the pyrolysis gases in a very shallow layer which <br>
continually moved upwards towards the incoming air. When it fills to the top <br>
you must have a cylinder of charcoal left that acts like a plug so it just <br>
slowly shuts down as the amount of exothermic heat drops away. <br>
<br>
> As I watch maximum power, and I see it begin to drop, I can add a <br>
>thin layer of wood chips and, IMMEDIATELY to power comes back up. It <br>
>appears to me that it's the new wood chips that are the "new" energy <br>
>source, not the (rapid change in) dissociation of CO2 to CO and O2 or <br>
>the sudden "new" dissociation of H2O to H2 and O2. <br>
<br>
The previous set of answers apply, but you are right in that new chips have <br>
the pyrolysis gases to sustain the oxidation band as gas will burn first <br>
turning the wood to char, but as the interface to the flame front keeps <br>
moving up away from the char, it lacks air to maintain oxidation <br>
> of the char. <br>
<br>
I'm pretty sure that is your situation, but give me the fuel operating info <br>
and we can then see if I read your description correctly. <br>
<br>
I just remembered (must be getting old) I did a report on condensates for <br>
the Fluidyne Archive with photos. <a target="_blank" href="http://www.fluidynenz/250x.com">www.fluidynenz/250x.com</a> <br>
<br>
Doug Williams, <br>
Fluidyne. <br>
<br>
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