[Gasification] Biomass briquettes used in updraft gasifier

[Arnt Karlsen]

On Wed, 27 May 2015 15:31:51 -0700, Mohammed wrote in message 
<CAHiY34cc1bg53CpY7rWJ+xdeE6mirsy1C5jL7Z6N8=joj8-eZQ at mail.gmail.com>:

> Hello Mr. Miles,
> 
> I am from Pakistan and we run a biomass briquetting plant . We use
> wood waste and sugar cane bagasse to make cylindrical briquettes
> which are 30mm in dia and length around 100-150mm, The bulk density
> is near 650kg/M3. The heat value is around 4300kcal/kg

..only pelletized sewer, as "delivered" (we stole it ;o)) the pellets
were 6mm diameter by 10 to 40mm long and packed too hard, and would 
not burn in free air unless flooded with oxygen from a cutting torch, 
we got it running best in my gasifier (114mm throat "V-hearth Imbert"
with tar vapor flare on/into combustion zone "lens")  by re-pelletizing
it to 20mm diameter by 20mm long.

..the sewer pellets is ~60% minerals and ~40% "biomass" from:
http://www.ivar.no/sentralrenseanlegg-nord-jaren/category618.html
https://translate.google.no/translate?sl=auto&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fwww.ivar.no%2Fsentralrenseanlegg-nord-jaren%2Fcategory618.html&edit-text=


..your pellet size _may_ have the right diameter, try make them shorter.

> We would like to know from the participants in list whether they have
> used biomass briquettes on fixed bed updrafts on any process heating
> application. Our installation is alongside a ceramic tile unit which
> uses a fixed bed updraft gasifier using thermal coal to gasifiy,
> puriofy and run the kiln around 1200-1250 C.

..downdraft sounds like a better idea here, you will have much cleaner
gas in the kiln throughout the firings and higher quality tiles, even
without my tar vapor flare, Imbert style gasifiers are all proven mature
technology and runs much cleaner than updraft gasifiers.

..the only reason to run an updraft gasifier on a kiln would be 
if you want to use the tar vapors to seal the ceramics.

> Would love to hear from you guys
> 
> Regards
> 
> Umer Hussain
> KX Power


-- 
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.