[Gasification] Sawdust in Fan TLUD

Harrie Knoef btg-hk at btgworld.com
Sat Jun 4 02:44:46 CDT 2011


It is vey nice to see all the concervation on the last messages
Who is right or wrong?

One thing is for sure, Bjorn is still driving his own 
wood-fired car.
As many in Finland, Sweden, and also one now in the Netherlands

Thanks to Bjorn Kjelstom, and all others,


hARRIE

Hello Tom Miles,
> 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
> 
> *****************************************************
> 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 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
> 
>  
> 
> 





More information about the Gasification mailing list