[Gasification] blower suggestions?

[jim mason]

shop vacs that are of axial fan design tend to work.  these are the
ones with the motor above the can.  the old style with the motor down
inside the can do not work, as the gas passes through the motor.

shop vacs tend to not be terribly well sealed, often in difficult to
seal places around the motor.  but yes, they are what i have long used
and they work.

the can is a bit of a problem as if you get air in the system you can
get a small explosion in there. but woodgas is such a low energy gas
that the explosion barely rises to the level of entertaining.

currently i only run the blower after the cooling, so i can use
plastic shop vacs.  but on testing various rigs, it would be much
better if i could run hot gas through this.  this is the main reason
why i want to move away from shop vacs.  there is consistent temp,
tar, particulate situation, as what is being run is always changing.
thus a heat tolerant, sealed, 10" vacuum capable blower/vac is
desired.

the suggestion for the regenerative type pump/vac looks very
interesting.  but i fear they will be senstive to particulates, and
some tests run lots of particulates through the vac.  the way i test
fluidized beds is with clear tubing and cold fuel so i can see an
approximation of the mechanical action under operating.  lots of fuel
usually get sucked out the top in such.

thank you everyone for the suggestions.

j




On 8/7/07, Kevin Chisholm <kchisholm at ca.inter.net> wrote:
> Dear Jim
>
> What is the problem that prevents you from using your shop vac for
> gasifier exhausting?
>
> What volume flow rate do you require? What temperature is the gas
> flowing through the exhauster? Does the gas contain tar, ash, etc? Is
> mild steel acceptable as shaft material? Would any of plastic, aluminum,
> or mild steel be acceptable as casing and blade materials?
>
> This info would be helpful in adapting an existing fan to the
> application (cheap and it might work), or in purchasing an "engineered
> exhauster". (expensive but it will work.)
>
> Thanks.
>
> Best wishes,
>
> Kevin
>
> jim mason wrote:
> > i need to stop using shop vacs to pull my vacuum for gasifier tests.
> > i'm curious what people have found useful for gasifier testing, and
> > also long running when a blower is needed to feed an open flame
> > situation.
> >
> > i need to pull at least 10" of water vacuum.  a squirrel cage will not do it.
> >
> > as usual, the blower needs to be well sealed, and the cooling air for
> > the motor needs to not come from the blown gas.
> >
> > what are the good value solutions identified to date?
> >
> > jim
> >
> >
> >
> >
> > --------------------------------------------------------------------------------
> > jim mason
> > website: www.whatiamupto.com
> > current project: mechabolic (http://www.mechabolic.org)
> > announce list: http://lists.spaceship.com/listinfo.cgi/icp-spaceship.com
> >
> > _______________________________________________
> > Gasification mailing list
> > Gasification at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
> > http://gasifiers.bioenergylists.org
> > http://info.bioenergylists.org
> >
>
>
> _______________________________________________
> Gasification mailing list
> Gasification at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
> http://gasifiers.bioenergylists.org
> http://info.bioenergylists.org
>


-- 
--------------------------------------------------------------------------------
jim mason
website: www.whatiamupto.com
current project: mechabolic (http://www.mechabolic.org)
announce list: http://lists.spaceship.com/listinfo.cgi/icp-spaceship.com