[Gasification] Sawdust in Fan TLUD

Fri Jun 3 23:17:03 CDT 2011

Mikael,

You have your priorities in the right order: soccer and family should take
priority over gasification and blogs.

Thank you for your very detailed explanation. Many of us know Bjorn
Kjellstrom and appreciate his contributions to gasification. I hadn’t heard
about cyclone gasification for several years. It gave way to fast pyrolysis
using cyclones like in the Ensyn process. 

Congratulations on the sale to Pite. We will be watching your progress with
high ash-high alkali fuels. 

Kind regards,

Tom

From: gasification-bounces at lists.bioenergylists.org
[mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of Mikael
Sjöblom
Sent: Friday, June 03, 2011 3:16 PM
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] Sawdust in Fan TLUD

Tom,

Now I am back from the soccer training and all other commitments.

As you know our system  is named VIPP – Vortex Intensive Power Process where
the Vortex symbolizes the rotary movement that occurs in the reactor. 

The technology was originally developed by Professor Bjorn Kjellstrom at
Lulea University of Technology (LTU) in Northern Sweden. He and his crew
started to look at gas separation from bio fuels in a cyclone shaped reactor
in the early 90:th. In 1994 they developed a working prototype which was in
operation till 2004 when we acquired all rights of the technology.

The cyclone reactor is based on the Entrained Flow principle. One of the
advantages of a cyclone shaped reactor is that the particle treatment are
already starting in reactor. The reactor is ceramic insulated with a
proprietary ceramic composition to withstand heat and mechanical wear. The
temperature in the cyclone is approx. 850°C (1562°F) with full load and is
relatively evenly distributed. The fuel is fed into the reactor with
preheated air (approx.85°C (185°F)) to Increase the efficiency and increase
the heating value of gas. In addition, there are no moving parts in the
design, which means reduced costs.

One possible drawback to this type of reactor is that it requires relatively
dry fuel (<15% moisture) and small fuel fractions (<1,5 mm (59 MIL)) but
compared to other gasification technologies like e.g. CFB, which can handle
fuels with large fractions and higher moisture contents the investment cost
is very low.

After we acquired the gasification technology we started the work to develop
a gas cleaning system. We where originally looking at the Dahlman system
from the Netherlands, which seems to be effective, but due to very high
costs we decided to make our own system based on conventional process
technology with multi-cyclone, bio oil scrubber and wet electrostatic
precipitator. This system ensures the particle removal efficiency to <5
mg/Nm3. The bio oil in the scrubber circuit is recirculated until it is
thickened. Thickened oil is bleed off and fed back to the reactor where it
is sprayed on with new biofuel. This is a closed online loop and we are
adding a small volume of bio oil (RME) constantly. Using wood fuel we are
reducing the particle level from approx. 7 g/Nm3 after the reactor to to <5
mg/Nm3 after the cleaning system. The outlet gas temperature is 55°C
(131°F).

Normally we are using soft wood, dried and grinded to the specification we
want, but we have carried out a number of fuel studies with sugar bagasse
and hard wood as well. Recently we made a fuel study with Red canary grass
which is a field crop. This specific fuel has a relatively high ash content,
around 6% and the ash melting point around 1100°C (2012°F). The overall
results was very good, the gas analysis showed around same values as with
wood and the heating value was around 5 MJ/Nm3, as with wood fuel. As we are
gasifying in a relatively low temperature we are handling "difficult" fuels
very well, even if the ash melting points are low. Also we have no problems
to handle high ash volumes. This autumn we will conduct a big fuel study
with bark, peat moss, straw, torrefied wood and rice husks.

We have developed and built an industrial rated pilot plant that delivers
500 kW fuel power and which has been in operation for approx. 2000 hours
since 2009. After very successful operating results the technology has been
verified by ETC in Sweden who are one of the worlds most respected research
and development centre for renewable fuels with focus on gasification.

We have taken our first commercial order of a full-scale systems to Pite
Energi, a local energy company in Pitea in northern Sweden. The system,
which will be commissioned in late September this year will deliver 2.3 MWth
and 1.3 MWe. The fuel used in this system is wood pellets. The
engine/generator solution is delivered by Cummins Power Generation which
will verify the engine model (QSV91) for approx. 5000 hours before launching
as a commercial model. 

The cost of this system is today 4,6 MUSD installed, which means 3,500
USD/kWe. We are calculating with a price reduction down to approx. 3,000
USD/kWe after the first ten (10) sold systems.

There is a sales brochure to download at www.mevainnovation.se where you can
read more and see a picture of the pilot plant. I can't send it to the list
it as it's over 1 MB size.We are right now finalizing computer rendered
pictures from the full scale plant as well of all big equipment components
which I can send later.

If you have additional questions please feel free to ask.

Yours Sincererly

Mikael Sjöblom
Marketing Director

Sjögatan 13,
S-852 34 Sundsvall
SWEDEN
Phone: + 46 (0)60 15 34 10
Mobile: + 46 (0)70 572 73 30
Internet: www.mevainnovation.se
E-mail:  mikael.sjoblom at mevagroup.se

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in error please notify mikael.sjoblom at mevagroup.se

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From: Tom Miles <tmiles at trmiles.com>
Reply-To: Discussion of biomass pyrolysis and gasification
<gasification at lists.bioenergylists.org>
Date: Fri, 3 Jun 2011 16:26:52 +0200
To: 'Discussion of biomass pyrolysis and gasification'
<gasification at lists.bioenergylists.org>
Subject: Re: [Gasification] Sawdust in Fan TLUD

Mikael,

Your VIPP - Vortex Intensive Power Process looks  interesting. There is not
much to see on your website. (http://www.mevainnovation.se/ ) Do you have
product and system brochures? Is this based on university research?

I'd be interested to know what scale you have built, how long you have run
and what fuels you have gasified. The website says that you are targeting
1-2 MWe. 

What are the fuel specifications? <6 MM? 10% MC?

Can you handle high as fuels such as ground wheat straw? 4-8% ash with more
than 0.5 kg/GJ alkali (K20+Na2)?

A system to handle ground straw would be very useful. Can you supply a
turnkey system for USD $3,000/kWe or less?

Thanks

Tom

From: gasification-bounces at lists.bioenergylists.org
[mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of Mikael
Sjöblom
Sent: Friday, June 03, 2011 6:52 AM
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] Sawdust in Fan TLUD

Or you can as we do, gasify fine sawdust in a cyclone reactor.

 Yours Sincererly

Mikael Sjoblom
Marketing Director

Meva Innovation AB

Sjögatan 13,
S-852 34 Sundsvall
SWEDEN
Phone: + 46 (0)60 15 34 10
Mobile: + 46 (0)70 572 73 30
Internet: www.mevainnovation.se
E-mail:  mikael.sjoblom at mevagroup.se

*****************************************************
This email and any files transmitted with it are confidential
and intended solely for the use of the individual or entity to
whom they are addressed. If you have received this email
in error please notify mikael.sjoblom at mevagroup.se

This email message has been virus checked by the virus
programs used by Meva Group.
***************************************************** 
P Please consider the environment - do you really need to print this email?

From: Tom Miles <tmiles at trmiles.com>
Reply-To: Discussion of biomass pyrolysis and gasification
<gasification at lists.bioenergylists.org>
Date: Fri, 3 Jun 2011 14:55:43 +0200
To: 'Discussion of biomass pyrolysis and gasification'
<gasification at lists.bioenergylists.org>
Subject: [Gasification] Sawdust in Fan TLUD

TLUD-ites,

Does anyone have experience gasifying sawdust in a fan powered TLUD?
Continuous feed?

Tom Miles

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