Testdrive with the Renault Twizy. Maybe a solution for using woodgas electricity ?
20. März 2016
27. Februar 2016
We changed the engine.
What do you
think will happen ?
when the
engine in a
cogeneration plant is
replaced?
We did the try and changed our 1.4 liter engine into a 1.05 liter engine.
Would you think 25% less engine cubic would also mean 25% less energy?
And did you also think the gasifier will need 25% less wood ?
Engine running at 1500 rpm with both engines.
We did the try and changed our 1.4 liter engine into a 1.05 liter engine.
Would you think 25% less engine cubic would also mean 25% less energy?
And did you also think the gasifier will need 25% less wood ?
Engine running at 1500 rpm with both engines.
Also the generator is the same.
In the used engine one cylinder was full of oil. before we installed it we decided to burn out the oil before.
31. Januar 2016
Energy consumption - DriZzleR Gasifier Generator Control (DGGC)
Hi Folks a new video from the DriZzleR CHP System.
measuring the energy consumption of the control including all motors and sensors.
19. Januar 2016
We created a short trailer for the DriZzleR Gasifier
Get ready for the DriZzleR gasifier trailer...
...maybe soon in your cinema? :-)
17. Januar 2016
12hours Testrun.
Hi Guys.
We did another Testrun.
Only 12 hours running but it seems to be in pretty good conditions for longer testruns :-)
We must find some more time for the next long testrun...
here is the video:
27. Dezember 2015
15. Oktober 2015
The Grateless DriZzleR Design From idea to V3
Hi folks,
It all started on 15 mai 2013, with a discusion on the famous German "Holz gibt Gas" about grate design and how to overcome the problem of the grate of a gasifier getting blocked by packed charcoal dust, dirt and other elements that prevent a gasifier from breathing normaly.
I posted then following drawing of an concept. which had in embrio the most important element of V3
An other member of the "HgG" forum, Bulldoc actualy had build a such a grate system but, at least to my knowledge never tested it in practise.
Looking however allways to eliminate elements and in constant fear for overengeneering, we tried first a grateless design that would had no mechanical turning pats and that would work purely on suction. First came this;
....But because of too much resistance it soon was changed in this design.
Merely just one elbow and a reduction element that widened at exit. The so called stone slide. The Gasifier drum was half filled with fresh charcoal in wich the DriZzler tube was imersed. Further a level sensor and also inside the bucket was the cyclone. This design relied solemly on replenishment of the original charcoal by new gassed out coaled large woodchips. If too much charcoal would enter then the level sensor would trigger a mechanism to evacuate the exces coal out of the Drum.
It was thought that the finest charcoal dust would go in suspension with the gasstream and the heavier elements such as stones and nails would sunc to the bottem wher they landed in a dirt-pit.
The gasifier was put on a maraton test to see if the idea would work. The suspension of the fine dust worked well but to our great surprice the available charcoal could not been kept on level. More was consumed than could be produced, After 24 hours the charcoal was all gone and the gasifier went out.
A video of this test was made and published on youtube.
Conclusion was made quick. We must find a way to hold the charcoal in a steady way. An in between idea, a turning grate was never tested.
In the mean time spacepater, an active member of our DriZzleR Forum also started experiments wit grateless design bringing into my mind back the old year 2013 idea and a new improved gasifier with a very condensed feeding mechanism (not a auger more a vice because of the flights beeing very close to each other) was build.
A test turned out not very succesfull. The vice had much play inside the reduction tube and the pull by the blower sucked the vice empty soon. A new one whit a vice closer matching the reduction tube and with a large dropbox-gasexpansion tower was preforming very well. It had a so called stone transporter The vice and a charcoal holder.
Stones went in the dirt-pit, charcoal in a charcoal container where eventualy by suficient amout it could be lighted and renter the gasstream untill copletely consumed. This coproduction woodgas and charcoalgas machine was not tested in this form. We only tested the woodgas version,
The dirt pit however was very small and did not allowed longer runs than 4 hours before it had to be emptied.
Drawing of the improved on with return charcoal transport and charcoal holder/afterburner. Was tested only in woodgas version.
Being pleased with the results finaly version 3 came to be tested and was merely build around the same princeipe of the V2 but designed for longer runs. It is the latter that can be seen in this video.
This text is written on demand of many people to asked about how the interior of the Grateless looked like. As we never want to show untested and unfunctional devices it took a little while before we could forfill the demand. This V3 is performing good enough to show. However we discoverd some things that can be improved and that is what we are going to do. So saty tuned the V3 is not the last grateless we will build.
Luk
Pascal
It all started on 15 mai 2013, with a discusion on the famous German "Holz gibt Gas" about grate design and how to overcome the problem of the grate of a gasifier getting blocked by packed charcoal dust, dirt and other elements that prevent a gasifier from breathing normaly.
I posted then following drawing of an concept. which had in embrio the most important element of V3
An other member of the "HgG" forum, Bulldoc actualy had build a such a grate system but, at least to my knowledge never tested it in practise.
Looking however allways to eliminate elements and in constant fear for overengeneering, we tried first a grateless design that would had no mechanical turning pats and that would work purely on suction. First came this;
....But because of too much resistance it soon was changed in this design.
Merely just one elbow and a reduction element that widened at exit. The so called stone slide. The Gasifier drum was half filled with fresh charcoal in wich the DriZzler tube was imersed. Further a level sensor and also inside the bucket was the cyclone. This design relied solemly on replenishment of the original charcoal by new gassed out coaled large woodchips. If too much charcoal would enter then the level sensor would trigger a mechanism to evacuate the exces coal out of the Drum.
It was thought that the finest charcoal dust would go in suspension with the gasstream and the heavier elements such as stones and nails would sunc to the bottem wher they landed in a dirt-pit.
The gasifier was put on a maraton test to see if the idea would work. The suspension of the fine dust worked well but to our great surprice the available charcoal could not been kept on level. More was consumed than could be produced, After 24 hours the charcoal was all gone and the gasifier went out.
A video of this test was made and published on youtube.
Conclusion was made quick. We must find a way to hold the charcoal in a steady way. An in between idea, a turning grate was never tested.
In the mean time spacepater, an active member of our DriZzleR Forum also started experiments wit grateless design bringing into my mind back the old year 2013 idea and a new improved gasifier with a very condensed feeding mechanism (not a auger more a vice because of the flights beeing very close to each other) was build.
A test turned out not very succesfull. The vice had much play inside the reduction tube and the pull by the blower sucked the vice empty soon. A new one whit a vice closer matching the reduction tube and with a large dropbox-gasexpansion tower was preforming very well. It had a so called stone transporter The vice and a charcoal holder.
Stones went in the dirt-pit, charcoal in a charcoal container where eventualy by suficient amout it could be lighted and renter the gasstream untill copletely consumed. This coproduction woodgas and charcoalgas machine was not tested in this form. We only tested the woodgas version,
The dirt pit however was very small and did not allowed longer runs than 4 hours before it had to be emptied.
Drawing of the improved on with return charcoal transport and charcoal holder/afterburner. Was tested only in woodgas version.
Being pleased with the results finaly version 3 came to be tested and was merely build around the same princeipe of the V2 but designed for longer runs. It is the latter that can be seen in this video.
This text is written on demand of many people to asked about how the interior of the Grateless looked like. As we never want to show untested and unfunctional devices it took a little while before we could forfill the demand. This V3 is performing good enough to show. However we discoverd some things that can be improved and that is what we are going to do. So saty tuned the V3 is not the last grateless we will build.
Luk
Pascal
12. Mai 2015
Ein Holzvergaser so einfach und sicher wie ein Ölheizung oder ein Gaskessel.
Ein Holzvergaser so einfach und sicher wie ein Ölheizung oder ein Gaskessel. Dabei aber umweltbewusst und CO2-neutral. Davon
träumen viele, allerdings ist dieses Ziel nicht immer ganz so einfach zu
erreichen. Die meisten denken bei Holzvergasern an neue Feststoff Brennkessel,
da dort der Name ebenfalls Verwendung findet. In diesem Kessel wird das Holz
nicht einfach nur "verbrannt" sondern es wird vergast. Das Garantiert
eine sauberere Verbrennung und die Effizienz wird gesteigert. Wir gehen einen
anderen Weg und nutzen dieses Gas nicht nur einfach zur Verbrennung in einem
Kessel sondern lassen einen Verbrennungsmotor mit diesem Gas Strom erzeugen.
Strom aus Holz ??? Ja! genau. Bisher waren Holzverstromungsanlagen teuer, der
Betrieb war aufwendig und eine Nutzung unterhalb von 10kW elektrisch nicht
rentabel. Die neue Holzvergasungstechnologie des "DriZzleR Gasifier"
oder auch der "DriZzleR Holzvergaser" macht es möglich. Hackschnitzel
oder Pellets werden "direkt eingeleitet". Vergleichbar mit dem
Einspritzsystem in Ihrem PKW. Immer nur soviel Brennstoff wird zugeführt wie
gerade auch benötigt wird. Das macht den Betrieb wirtschaftlich und profitabel.
Die Leistung ist modulierbar. Je nach Anwendungsgebiet lässt sich das BHKW und
auch der DriZzleR Holzvergaser an Ihre Gegebenheiten anpassen. Mit nur 900
Gramm Pellets lässt sich eine Leistung von 1 kW elektrisch und bis zu 3 kW
thermisch erzeugen.
6. Mai 2015
neues Blockheizkraftwerk
lange Zeit war es im DriZzleR Blog ruhig.
Was allerdings nicht heißt das wir nix tun :-)
Fast 2 Monate arbeiteten wir jede freie Minute am neuen BHKW.
nun ist es fertig und hat mittlerweile die ersten Testläufe hinter sich.
Dazu gibt es ein Video vom 2. Testlauf.
Weitere Informationen zum Bau des BHKW´s findet man im Forum http://forum.thedrizzler.com/
anbei ist hier auch noch der direkte Link zum Thema:http://forum.thedrizzler.com/viewtopic.php?f=76&t=187#p1102
30. Dezember 2014
running engine with unfiltered woodgas ???
Maybe It was a little strange idea over the Christmas holidays .....
Why should hassle with the woodgas filtering ???
Why should hassle with the woodgas filtering ???
If you can produce the same gas which is almost free of debris you do not need more filters?
Call me crazy :-)
For this reason, I did a test today.
First I installed a glass tube just behind the gas cooler. So i can now visually view the gas flow. Not the best solution for a gas analysis. But unfortunately I do not have a meter to measure particles in the gas stream. If anyone has a good source for such a device just tell me.
The gasifier was started.
After 10 minutes, something happens in the glass tube:
It collected condensation on the inside of the tube. The gas was cooled by the gas cooler down to 15°C and the water condensed out. If really large quantities are in the gas, the condensation should change color. What does not happen, however, the tube remained clear and transparent and that although without a filter!
After cleaning the glass tube, I rebuild it and started the Honda generator with this "unfiltered GAS" and some stomach pains .....
The generator ran pretty exactly 5 hours with a load of 850 to 2050W. I changed permanently the current output. To see whether the condensation in the glass tube during load variations discolored.
But it changed nothing. The glass tube was always good Transparent and wet with condensation from the inside.
After 5 1/2 hours the test was terminated.
I wanted for the next test still put a swimming pool filter as a security filter in between. If you have further what should come through.
What do you think we can assume that this gas the engine does not hurt?
But it changed nothing. The glass tube was always good Transparent and wet with condensation from the inside.
After 5 1/2 hours the test was terminated.
I wanted for the next test still put a swimming pool filter as a security filter in between. If you have further what should come through.
What do you think we can assume that this gas the engine does not hurt?
Suggestions and discussions in the forum, I would be delighted.
regards Pascal
15. Dezember 2014
upside/down DriZzleR Gasifier (english version)
The DriZzleR gasifier was able to prove his concept in hundred hours of operation.
The manual drizzle mode has been changed a long time ago to automatic operation.
The fuel supply was realized by an auger. The regulation of the flaming pyrolysis been done by the "Pyrotouch". The grate shaking "cleaned" by pressure changes in the gasifier automatically.
We might therefore assume that the development is now complete. The gasifier runs completely automatically. Trouble-free and is very easy to maintain by the simple design.
However all "Downdraft" gasifiers had sometimes problems with grate. In my eyes, the grate is the most important component inside a gasifier. If the grate is designed "to open" a lot of fuel will be wasted. If the grate is too fine it must often cleaned off, to prevent blockings. Frequent cleaning of the grate produces tar components which must be deposited in the filter. Also, any changing of the gasification process is counterproductive. The temperature in the gasifier starts to oscillate and thus the gas quality drops up and down. When using DIN pellets you have a fuel such as premium gasoline. Standardized, absolutely free of metal parts, stones or lumps of clay. However pellets tend, with the finest ingredients contained, to clog the grate by a fine carbon layer. Then there is a kind of "carpet" on the grate and blocks it. With wood chips, there is a similar problem. In addition to the fines in the form of wooden needles leaves or wood bark. Additionally, there are various items in the wood chips. Wood chips are often stored in agricultural holdings somewhere where impurities are on the agenda. These components later lay in the gasifier. There the lay on the grate and block it. Even the cleaning of the grate has stopped working sometime and you have to clean the gasifier manually by hand.
This problem is often compensated by a "special" grid construction. A "opened" grate then ensures that stones and nails can also fall out from the grate. Charcoal should be remain in the gasifier until the last useful ingredient are used. The remains unusable for gasification are deposited then in the cyclone and later deposited in the fine filter.
Another major problem is the grate temperature. I've gotten quite a few already melted metals grates. Also V2A or V4A make problems at high temperatures. This heat problems can be naturally eliminate with steels for "refractory". But prices for steel of this quality are not cheap. Very high temperatures just during the gasification of charcoal. Why is a blacksmith working on a charcoal fire? :-)
Just the open design has helped the DriZzleR Gasifier to success. Simple in design and probably one of the easiest gasifiers to build without welding equipment or special skills in metalworking. There are DriZzleR gasifiers built only with a drill and tools that can be found in every household. Anyone can build it. Or can take it to and metal-working shop to build a DriZzleR with different materials in a short time.
In some countries opentop gasifiers are banned because of fire hazard. To understand laws and to test for meaningfulness I will leave to other people. Often some people feel fear running an open gasifier.It may come at an detonation to backfiring. I myself have never experienced with a DriZzleR gasifier had made any flashbacks. And I know this kind of flashback from my time with the Imbert clone gasifier. In my opinion, a closed gasifier is much more dangerous.
Now how can we fix the problem with the grate and also the "in some countries legally questionable OpenTop Design" without losing the benefits of the DriZzleR Gasifier?
The upside / down DriZzleR gasifier operates on the same principle. Of course with plenty a lot of air, a constant "flaming pyrolysis" and the fuel supply as needed, just as much as just absolutely needed to stay the gasification process running.
Just turn the DriZzleR upside/down ;-)
Also the security attention was paid. The upside/down DriZzleR Gasifier has a pressure valve installed. Should there would really be a flashback this valve opens and allowing "steam" to blow out. Even for hedging a burn back into the auger is provided. When the temperature in the auger exceeds the 90°C it will be completely flooded with water to prevent back burning into the container.
The manual drizzle mode has been changed a long time ago to automatic operation.
The fuel supply was realized by an auger. The regulation of the flaming pyrolysis been done by the "Pyrotouch". The grate shaking "cleaned" by pressure changes in the gasifier automatically.
We might therefore assume that the development is now complete. The gasifier runs completely automatically. Trouble-free and is very easy to maintain by the simple design.
However all "Downdraft" gasifiers had sometimes problems with grate. In my eyes, the grate is the most important component inside a gasifier. If the grate is designed "to open" a lot of fuel will be wasted. If the grate is too fine it must often cleaned off, to prevent blockings. Frequent cleaning of the grate produces tar components which must be deposited in the filter. Also, any changing of the gasification process is counterproductive. The temperature in the gasifier starts to oscillate and thus the gas quality drops up and down. When using DIN pellets you have a fuel such as premium gasoline. Standardized, absolutely free of metal parts, stones or lumps of clay. However pellets tend, with the finest ingredients contained, to clog the grate by a fine carbon layer. Then there is a kind of "carpet" on the grate and blocks it. With wood chips, there is a similar problem. In addition to the fines in the form of wooden needles leaves or wood bark. Additionally, there are various items in the wood chips. Wood chips are often stored in agricultural holdings somewhere where impurities are on the agenda. These components later lay in the gasifier. There the lay on the grate and block it. Even the cleaning of the grate has stopped working sometime and you have to clean the gasifier manually by hand.
This problem is often compensated by a "special" grid construction. A "opened" grate then ensures that stones and nails can also fall out from the grate. Charcoal should be remain in the gasifier until the last useful ingredient are used. The remains unusable for gasification are deposited then in the cyclone and later deposited in the fine filter.
Another major problem is the grate temperature. I've gotten quite a few already melted metals grates. Also V2A or V4A make problems at high temperatures. This heat problems can be naturally eliminate with steels for "refractory". But prices for steel of this quality are not cheap. Very high temperatures just during the gasification of charcoal. Why is a blacksmith working on a charcoal fire? :-)
Just the open design has helped the DriZzleR Gasifier to success. Simple in design and probably one of the easiest gasifiers to build without welding equipment or special skills in metalworking. There are DriZzleR gasifiers built only with a drill and tools that can be found in every household. Anyone can build it. Or can take it to and metal-working shop to build a DriZzleR with different materials in a short time.
In some countries opentop gasifiers are banned because of fire hazard. To understand laws and to test for meaningfulness I will leave to other people. Often some people feel fear running an open gasifier.It may come at an detonation to backfiring. I myself have never experienced with a DriZzleR gasifier had made any flashbacks. And I know this kind of flashback from my time with the Imbert clone gasifier. In my opinion, a closed gasifier is much more dangerous.
Now how can we fix the problem with the grate and also the "in some countries legally questionable OpenTop Design" without losing the benefits of the DriZzleR Gasifier?
The upside / down DriZzleR gasifier operates on the same principle. Of course with plenty a lot of air, a constant "flaming pyrolysis" and the fuel supply as needed, just as much as just absolutely needed to stay the gasification process running.
Just turn the DriZzleR upside/down ;-)
Also the security attention was paid. The upside/down DriZzleR Gasifier has a pressure valve installed. Should there would really be a flashback this valve opens and allowing "steam" to blow out. Even for hedging a burn back into the auger is provided. When the temperature in the auger exceeds the 90°C it will be completely flooded with water to prevent back burning into the container.
To remove the grate problems, there is actually only one way in order to enable the requirements of a permanent gasification. This model called the "fluidized bed gasifier". This type of gasifier is normally only used for Gasifiers above the 500KW class. Smaller "fluidized bed gasifier" are rare. The only exception of the "fluidized bed gasifier" styles are 2 homemade gasifier i know. One of Mr. Pertl and one of Holzigas. This type of gasifier has not a traditional grate design. There is no grate of metal melting away under the heat or could be destroyed. The residual charcoal in the gasifier forms a three-dimensional grate. The vacuum in the system removes the fine pulverized coal deposited with the gas stream from the gasifier. Waste materials such as stones or lumps of clay nails apart and try to hinder the gasification process can not be measured. The gasification takes place completely. There remains nothing except coal dust from the gasification as a waste product. A residual-free use of fuel increase the efficiency and leads to more efficient use of energy.
In this type of gasifier the complete residue (charcoal dust) is discharged with the gas. Unfiltered "darted" then thousands of pulverized coal particles with the gas from the gasifier. In the unfiltered "flare" you can see this pulverized coal as a "firework". If you need engine operation (EGG - Engine grade gas) the gas must be filtered out when you use it for heating operating (HGG - Heating degree gas) the coal dust offers more potent gas. A filtering of the pulverized coal is only necessary for EGG purposes. A cyclone separator ensures this pulverized coal in first filter stage from the gas. In the 2nd stage filter, a fine filter, the last finer elements ,ust be removed.
Usually this type of gasifier has a rather bad reputation. So assuming, in the literature that this gasifier produce less tar than a "updraft" gasifier. But even more tar than the normal "Downdraft" gasifier. This must be proved however only. FAO writes about the gasifier type the following:
"
Other disadvantages of the fluidized bed gasifier lie in the relatively high tar content of the product gas (up to 500 mg / m³ gas), the incomplete coal combustion and poor response to load changes. "
In the literature we finds similar statements about the DriZzleR design. Which have proved in reality to be completely false. Does not produce tar, delivers bad gas and similar statements. This sentence had not been able to stop us refuting these theoretical literature. :-)
The pilot plant is operated in the first step only with standartized DIN wood pellets in 6mm diametre. Thus, one can assume that any "whims" not caused by the fuel in gasification.
The first tests were not really promising, The gasifier hurl tar up to the ceiling and around to the gasifier, it looked as if someone had the floor badly paved. But that's actually in any attempt at the beginning folds almost nothing. Doubters of system would now probably thinking, "Do you see has already told the literature". ;-)
The second test was promising. The flame was still not really "nice" but except of coal dust were no other undesirable ingredients more from the gasifier. The gasifier produced the most beautiful HHG (Heating degree gas). However, not so perfect that I would take the trouble to filter it. So after the test is prior to the test :-)
The third test run after some modifications was even worse than the first test. Tar and nothing as tar was produced.
Even tar components be in contact with the skin cannot be removed.
Mixed tar components which cannot been removed also mechanically.
Here's a video of this dirt stuff:
Until the gasifier running 4 hours and about 50kg pellets, a nice charcoal bed had formed. Then 80kg more woodpellets were put into the gasifier to watch whether the state can be considered as stable.
The flame had changed significantly. The "flame" now was what might be called "unfiltered" EGG. In order to increase the sucking force i switched on the ejector additionally.
To be really sure that this is not just a fleeting appearance of nature. I need to do this last test several times to really make sure that the results are reproducible.
So it remains exciting .... Now a lot of more few hundred kilos must be eaten by the gasifier. But problems with his figure, he certainly will not get :-)
Comments, suggestions and criticisms like to ask in the forum post at:
http://forum.thedrizzler.com/viewtopic.php?f=18&t=151#p751
http://forum.thedrizzler.com
upside/down DriZzleR Gasifier
Der DriZzleR Gasifier hat sich bereits in
hunderten von Betriebsstunden beweisen können.
Der Handbetrieb wurde schon vor langer
Zeit auf einen Automatik Betrieb umgestellt.
Die Brennstoffzuführung wurde mittels
Förderschnecke realisiert. Die Regulierung der Flammenden Pyrolyse
wurden durch den "Pyrotouch" erledigt. Der Rost wurde durch
Druckveränderungen im Vergaser automatisch "abgereinigt".
Man könnte also davon ausgehen das die
Entwicklung nun abgeschlossen ist. Der Vergaser läuft vollkommen
Automatisch. Störungsfrei und ist durch das einfache Design sehr
wartungsfreundlich.
Allerdings gibt es bei allen
"Downdraft" Vergasern irgendwann Probleme mit dem Rost. In
meinen Augen ist der Rost die wichtigste Komponente in einem
Vergaser. Ist der Rost zu grob gewählt wird jede Menge Brennstoff
verschwendet. Wird der Rost zu fein gewählt muss er häufiger ab
gereinigt werden, um sich nicht zuzusetzen. Häufiges Abreinigen des
Rostes erzeugt Teer Bestandteile die dann im Filter aufwendig
abgeschieden werden müssen. Auch ist jede Störung des
Vergasungsprozesses kontraproduktiv. Die Temperatur im Vergaser
beginnt zu schwanken und damit auch die Gasqualität. Bei Benutzung
von DIN Pellets hat man einen Kraftstoff wie Super Benzin. Genormt,
absolut frei von Metallteilen, Steinen oder Tonklumpen. Allerdings
neigen Pellets dazu, mit den enthaltenen feinst Bestandteilen, den
Rost durch eine fein Kohleschicht zu verstopfen. Dann liegt eine Art
„Teppich“ auf dem Rost und setzt ihn zu. Bei Hackschnitzeln
besteht ein ähnliches Problem. Neben den Feinanteilen in Form von
Nadel, Blättern oder Rindenanteilen. Zusätzlich befinden sich noch
diverse Verunreinigungen in den Hackschnitzeln. Hackschnitzel werden
häufig in Landwirtschaftlichen Betrieben irgendwo gelagert wo
Verunreinigungen an der Tagesordnung sind. Diese Bestandteile
befinden sich dann später natürlich auch im Vergaser. Dort setzten,
diese den Rost zu und blockieren Ihn. Selbst die Abreinigung des
Rostes funktioniert irgendwann nicht mehr und man muss den Vergaser
Stoppen und den Rost manuell von Hand reinigen.
Diese Problem wird häufig durch eine
„spezielle“ Rostkonstruktion kompensiert. Man verschwendet
bewusst Holzkohle. Ein grober Rost sorgt dann dafür das auch Steine
und Nägel aus dem Vergaser raus fallen können. Kohle sollte, meiner
Meinung nach, bis zum letzten nutzbaren Bestandteil im Vergaser
verbleiben. Die nicht nutzbaren Überreste für die Vergasung, werden
dann im Zyklon und später im Feinfilter abgeschieden.
Ein weiteres großes Rostproblem ist
die Temperatur. Ich habe mittlerweile schon ziemlich viele Metalle
geschmolzen. Ob nun Guss, V2A oder V4A alle bereiten bei hohen
Temperaturen irgendwann Probleme. Diese Hitzeprobleme lassen sich
natürlich mit „hitzefesten“ Stählen beseitigen. Aber die Preise
für Stahl dieser Güte sind nicht gerade günstig. Gerade bei der
Vergasung von Kohle treten sehr hohe Temperaturen auf. Warum wird
wohl auf einem Kohlefeuer geschmiedet? :-)
Gerade das offene Design hat den
DriZzleR Gasifier zum Erfolg verholfen. Einfach in der Bauart und
wohl auch der ein zigste Vergaser überhaupt der komplett ohne
Schweißgerät oder besondere Fähigkeiten in der Metallverarbeitung
gebaut werden könnte. Es gibt DriZzleR Vergaser die nur mit einer
Bohrmaschine und Werkzeugen die in jedem normalen Haushalt zu finden
sind, gebaut wurden. Jeder kann Ihn bauen. Oder in kurzer Zeit in
Metallverarbeitenden Betrieben aus unterschiedlichen Materialien
bauen lassen.
In manchen Ländern sind OpenTop
Vergaser wegen angeblicher Feuergefährdung verboten. Gesetze zu
verstehen und auf Sinnhaftigkeit zu prüfen überlasse ich anderen
Leuten. Oft bereitet manchen Leute ein offener Vergaser auch Angst.
Da es bei einer Verpuffung zu Rückzündungen kommen kann. Ich selbst
habe bei einem DriZzleR Gasifier so eine Rückzündung nie erlebt. Und kenne
diese Art der Rückzündung eigentlich nur aus meinen Zeiten mit dem
Imbertclone. In meinen Augen ist ein geschlossener Vergaser viel
gefährlicher.
Was tut man nun um die Problem mit dem
Rost und auch das "in manchen Ländern gesetzlich fragliche"
OpenTop Design zu verändern, ohne die Vorteile des DriZzleR Gasifier´s zu
verlieren ?
Der upside/down DriZzleR Gasifier arbeitet nach
dem gleichen Prinzip. Natürlich mit reichlich Luftüberschuss, einer
gleichbleibenden "Flammenden Pyrolyse" und der
Brennstoffzuführung nach Bedarf, nur soviel wie gerade unbedingt
benötigt wird um den Vergasungsprozess zu erhalten.
Auch auf die Sicherheit wurde Wert
gelegt. Beim upside/down DriZzleR Gasifier ist ein Überdruckventil
installiert. Sollte es wirklich zu einer Rückzündung kommen öffnet
dieses Ventil und lässt „Dampf“ ab. Auch für eine Absicherung
des Rückbrandes in die Förderschnecke ist gesorgt. Sobald die
Temperatur in der Schnecke die 90°C Marke überschreitet wird die
Schnecke komplett mit Wasser geflutet um ein übergreifen der Flammen
in den Behälter zu verhindern.
Um das Rost Problem zu beseitigen gibt
es eigentlich nur eine Möglichkeit um die Anforderungen eines
Dauerrostes zu ermöglichen. Es handelt sich um das Modell des
"Fluidized bed gasifier" Vergasers. Dieser Vergasertyp wird
normalerweise nur bei Vergasers oberhalb der 500KW Klasse angewendet. Kleinere
"Fluidized bed gasifier" gibt es wenige. Einzige Aunahme
des "Fluidized bed gasifier" Designs bilden 2 Eigenbau Vergaser. Einen von Herrn Pertl und
einen von Holzigas. Dieser Vergasertyp besitzt kein herkömmliches
Rostdesign. Es besteht kein Rost aus Metall der unter der Hitze
schmilz oder zerstört werde könnte. Die Restkohle im Vergaser
bildet einen dreidimensionalen Rost. Durch den Unterdruck im System
kommt es zu keinerlei Verdichtungen und es wird nur feiner
Kohlenstaub mit dem Gas aus dem Vergaser abgeschieden. Reststoffe wie
Nägel Steine oder Tonklumpen fallen zur Seite und behindern den
Vergasungsprozess nicht messbar. Die Vergasung findet komplett statt.
Es bleibt nix außer Kohlenstaub von der Vergasung als Restprodukt
zurück. Eine Restlose Nutzung des Brennstoffes steigert die
Wirtschaftlichkeit und führt zu Energie effizienteren Nutzung.
Durch diese Art des Vergasertypes wird
der komplette Reststoff (Kohlestaub) mit dem Gas ausgetragen.
Ungefiltert „flitzten“ dann tausende von Kohlenstaub Partikeln
mit dem Gas aus dem Vergaser. Wenn man das Gas ungefiltert
„abfackelt“ kann man dieses Kohlenstaub „Feuerwerk“ sehr gut
erkennen. Der Kohlenstaub muss für den Motorbetrieb (EGG – Engine
Grade Gas) ausgefiltert werden, bei der Nutzung zum Heizen (HGG –
Heating Grade Gas) bietet bringt er potenteres Gas. Ein Ausfiltern
des Kohlenstaubs ist nur für EGG Zwecke notwendig. Ein Zyklon
Abscheider sorgt beim EGG Betrieb später dafür diesen Kohlenstaub
als erst Filterstufe vom Gas zu trennen. In der 2. Filterstufe muss
ein Feinfilter die letzten feineren Bestandteile entfernen.
Normalerweise hat dieser Vergasertyp einen eher schlechten Ruf. So dass man in der Literatur davon ausgeht, dass diese Vergaser weniger Teer als ein "Updraft" Vergaser produzieren. Aber auch mehr Teer als die normalen "Downdraft" Vergaser. Das muss allerdings erst bewiesen werden. FAO schreibt über die Vergasertyp folgendes:
"
Weitere Nachteile der Wirbelschichtvergaser liegen in der relativ hohen Teergehalt des Produktgases (bis 500 mg / m³ Gas), die unvollständige Kohlen Ausbrand und schlechte Ansprechen auf Laständerungen."
http://www.fao.org/docrep/T0512E/T0512e0a.htm
In der Literatur findet man auch ähnliche Aussagen zum DriZzleR Design. Welche sich in der Realität als vollkommen Falsch erwiesen haben. Geht nicht produziert Teer, liefert schlechtes Gas und ähnliche Aussagen. Das hat uns allerdings auch bisher nicht abhalten können, diese theoretischen Literatur zu widerlegen. :-)
Normalerweise hat dieser Vergasertyp einen eher schlechten Ruf. So dass man in der Literatur davon ausgeht, dass diese Vergaser weniger Teer als ein "Updraft" Vergaser produzieren. Aber auch mehr Teer als die normalen "Downdraft" Vergaser. Das muss allerdings erst bewiesen werden. FAO schreibt über die Vergasertyp folgendes:
"
Weitere Nachteile der Wirbelschichtvergaser liegen in der relativ hohen Teergehalt des Produktgases (bis 500 mg / m³ Gas), die unvollständige Kohlen Ausbrand und schlechte Ansprechen auf Laständerungen."
http://www.fao.org/docrep/T0512E/T0512e0a.htm
In der Literatur findet man auch ähnliche Aussagen zum DriZzleR Design. Welche sich in der Realität als vollkommen Falsch erwiesen haben. Geht nicht produziert Teer, liefert schlechtes Gas und ähnliche Aussagen. Das hat uns allerdings auch bisher nicht abhalten können, diese theoretischen Literatur zu widerlegen. :-)
Die Versuchsanlage wird im ersten
Schritt nur mit Holzpellets der DIN Norm in 6mm betrieben. So kann
man davon ausgehen das eventuelle „Launen“ beim Vergasen nicht
durch den Brennstoff verursacht werden.
Die 1. Tests liefen nicht wirklich
erfolgversprechend, Der Vergaser schleuderte Teer bis unter die Decke
und ringsherum um den Vergaser sah es aus als ob jemand dem Boden
schlecht geteert hatte. Aber so ist das eigentlich bei jedem Versuch
am Anfang klappt fast nix. Zweifler am System würden jetzt wahrscheinlich denken "Siehst du hat doch bereits die Literatur gesagt". ;-)
Der 2. Test war schon
vielversprechender. Die Flammen war zwar immer noch nicht wirklich
„schön“ aber außer Kohlenstaub kamen keine anderen
unerwünschten Bestandteile mehr aus dem Vergaser. Der Vergaser
produzierte schönstes HHG (Heating Grade Gas). Allerdings noch nicht so optimal, dass ich mir die Mühe machen würde es zu filtern. Also nach dem Test ist vor dem Test :-)
Der 3. Testlauf nach einigen
Umbaumaßnahmen verlief zuerst sogar noch schlechter, als beim ersten Test. Teer und nix als Teer wurde produziert.
Sogar Teerbestandteile die sich bei Kontakt mit der Haut nicht mehr entfernen lassen.
Gemischt mit Teerbestandteilen die sich nicht mal mechanisch entfernen lassen.
Hier ein Video von diesem Dreckszeug:
Bis der Vergaser nach ca 4 Stunden und ca 50kg Pellets, ein schönes Holzkohlebett geformt hatte. Danach wanderten weitere 80kg in den Vergaser um zu sehen ob der Zustand als Stabil betrachtet werden kann.
Sogar Teerbestandteile die sich bei Kontakt mit der Haut nicht mehr entfernen lassen.
Gemischt mit Teerbestandteilen die sich nicht mal mechanisch entfernen lassen.
Hier ein Video von diesem Dreckszeug:
Bis der Vergaser nach ca 4 Stunden und ca 50kg Pellets, ein schönes Holzkohlebett geformt hatte. Danach wanderten weitere 80kg in den Vergaser um zu sehen ob der Zustand als Stabil betrachtet werden kann.
Die Flamme hatte sich deutlich
verändert. Das „Flammbild“ entsprach nun dem, was man als
„ungefiltertes“ EGG bezeichnen könnte. Um die Saugkraft noch zu erhöhen wurde zusätzlich noch der Ejector zugeschaltet.
Um wirklich sicherzugehen das es sich
nicht nur um eine flüchtige Erscheinung der Natur handelt. Muss
dieser letzte Test nun mehrere Male wiederholt werden, um wirklich
sicherzugehen das die Ergebnisse reproduzierbar sind.
Es bleibt also weiterhin spannend....es müssen noch einige Hundert Kilo durch gejagt werden. Aber Probleme mit der Figur wird er sicherlich nicht bekommen :-)
Kommentare, Anregungen und gerne auch Kritik bitte im Forum posten unter:
http://forum.thedrizzler.com/viewtopic.php?f=18&t=151#p751
http://forum.thedrizzler.com
Kommentare, Anregungen und gerne auch Kritik bitte im Forum posten unter:
http://forum.thedrizzler.com/viewtopic.php?f=18&t=151#p751
http://forum.thedrizzler.com
13. Oktober 2014
Hello DriZzleR freinds,
In the series of youtube video's on "the simple learning DriZzleR" I added a new one. (part 3). This learning DriZzleR can also serve as a very simple and quick to build gasifier for emergency situations, or for use in small third world community's,
As an experiment I wanted to test if it was possible to fire it up and flare it when absolutely no energy was available. I used bicicle. (pedal powered gasifier).The test however did not showed much succes. Not so much because, it would be principly imposible to start the mini DrizzleR up on pedal power, but because the mechanical components where badly made.
As you know I have to give out all my mechanic work to a local blackschmitt and this time he realy did a shitty job.
Anyway i hope someone picks up the idea and shows a better performance someday.
Luk
In the series of youtube video's on "the simple learning DriZzleR" I added a new one. (part 3). This learning DriZzleR can also serve as a very simple and quick to build gasifier for emergency situations, or for use in small third world community's,
As an experiment I wanted to test if it was possible to fire it up and flare it when absolutely no energy was available. I used bicicle. (pedal powered gasifier).The test however did not showed much succes. Not so much because, it would be principly imposible to start the mini DrizzleR up on pedal power, but because the mechanical components where badly made.
As you know I have to give out all my mechanic work to a local blackschmitt and this time he realy did a shitty job.
Anyway i hope someone picks up the idea and shows a better performance someday.
19. September 2014
Storing Woodgas in Waterbed mattress
Yesterday i made a test with storing woodgas into a waterbet mattress.
the complete test including videos you can find in the
"International self supplier forum"
http://forum.thedrizzler.org
direct link:
9. September 2014
Woodgas Forum
We decided it is time to create a forum. At the beginning we thought of a "only DriZzleR" forum. But the biggest and best German woodgas forum www.holzgibtgas.com will end his service soon. So there will be no forum in the german speaking corner to gives woodgasers a home for their projects. So we decided to not only create a "only DriZzleR" forum. Also other gasifiers are welcome. Such the equipment behind the gasifier like coolers or filters are the same.
After this decision we thought about it. Not only woodgas could be the right way for such a forum. it must be an more potential forum which cares about more than just woodgas also about heat, mobility and electricity, food and also water.
We decided to name it "International self supplier forum" which takes care of all the different energy sources, food and farming and every other thing you can use on your way to be an self supplier. You can feel free to post your projects and get in contact with worldwide users talking about self suppling technologies.
The complete forum is like the DriZzleR project itselfs.
Totally open source and free for everybody.
After this decision we thought about it. Not only woodgas could be the right way for such a forum. it must be an more potential forum which cares about more than just woodgas also about heat, mobility and electricity, food and also water.
We decided to name it "International self supplier forum" which takes care of all the different energy sources, food and farming and every other thing you can use on your way to be an self supplier. You can feel free to post your projects and get in contact with worldwide users talking about self suppling technologies.
The complete forum is like the DriZzleR project itselfs.
Totally open source and free for everybody.
Have No Fear of linguistical barriers. Do not be afraid to post something in english. Or something that looks like english. Use the internet tools, it is possible to translate english into any desired language.
you can try to use the google translator also to translate the complete forum.
An
automatically translated text may not be grammatically correct. But it
can be understood by everyone in the world. And just as everyone else
can also answer that way.
You can also upload high quality pictures directly into the forum. For video uploads please use youtube. Also the youtube videos can directly integrated into your post.
7. September 2014
William´s DriZzleR Part 2 - No weld design
William's DrizZleR Part 2 - No weld design
William from the yahoo woodgas group, has
designed an intresting type of DriZzler. It is completely no weld and
made out of ready from the shelf materials. We are really looking
forward to his first tests with this remarkable design
---
William aus dem Yahoo Woodgasforum, hat einen interessanten DriZzleR Typ gebaut. Er baute Ihn ohne auch nur eine Schweißnaht nur mit Verbindungsmaterialien. Wir sind auf seine Test gespannt, bei diesem sehr einfach nach zubauenden Design.
---
William aus dem Yahoo Woodgasforum, hat einen interessanten DriZzleR Typ gebaut. Er baute Ihn ohne auch nur eine Schweißnaht nur mit Verbindungsmaterialien. Wir sind auf seine Test gespannt, bei diesem sehr einfach nach zubauenden Design.
a complete weld free DriZzleR system.
Here are the new modification pictures.
21. August 2014
Microgaser´s DriZzleR - Part 4
Microgaser and his brother did some changes to their DriZzleR. They now uses only a 50mm tube. The tube is around insulated. He is working with an ejector. Here are the pictures and the videos from the test run.
Microgaser und sein Bruder haben wieder einige Änderungen an Ihrem DriZzleR vorgenommen. Er benutzt nun nur noch ein 50mm Rohr. Die Röhre ist rundherum isoliert. Er arbeitet mit einem Ejektor. Hier sind einige Bilder und ein Video von seinem Testlauf.
Microgaser und sein Bruder haben wieder einige Änderungen an Ihrem DriZzleR vorgenommen. Er benutzt nun nur noch ein 50mm Rohr. Die Röhre ist rundherum isoliert. Er arbeitet mit einem Ejektor. Hier sind einige Bilder und ein Video von seinem Testlauf.
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