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Author Topic: Blower being affected by creosote  (Read 763 times)

Jeremy.flaugh

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Blower being affected by creosote
« on: March 31, 2015, 06:59:06 PM »

Hello everyone,

I've been working the bugs out of my gassifer build and one of them was chugging after some troubleshooting I found the issue to be lack of air so I bypassed the 6' of 2" pipe and 3 elbows and put the blower on the door.
I'm attempting to replicate this. http://i737.photobucket.com/albums/xx14/flaughs2000/Gassifer/What%20I%20copied_zps90lsdasg.jpg and that worked great, really clean burns the boiler starts the gasify in seconds but I was worried about the long term affects of the blower being part of the primary chamber with the way it was designed. I put the blower on the door Sunday and today the blower changed it's "tune" I found the blower full of a watery creosote and it ran thru the motor.

http://i737.photobucket.com/albums/xx14/flaughs2000/Gassifer/Front%20blower_zpsi2o8g7fb.jpg
http://i737.photobucket.com/albums/xx14/flaughs2000/Gassifer/creosote%20running%20trru%20blower_zpsfhrpwobm.jpg
http://i737.photobucket.com/albums/xx14/flaughs2000/Gassifer/Inside%20front%20door_zpsgzf8go9t.jpg

My guess is the gasses are condensing in the cold blower housing the only thing I can think to do is but a sheet metal flap on the inside of the door hoping that the blower will blow it open and not get stuck.

Does anyone have any input?

Thanks

Sorry for the photobucket links but I cant get photos to attach here.
« Last Edit: March 31, 2015, 07:06:54 PM by Jeremy.flaugh »
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slimjim

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Re: Blower being affected by creosote
« Reply #1 on: April 01, 2015, 02:45:36 AM »

You will need to open a flapper between the blower and door, actuators work better than solenoids for this purpose and tipping the blast tube for the air back toward the fire box helps to keep the creosote from sticking the flapper.
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Wood boiler sales, service and installation for the Northeastern USA.

Jeremy.flaugh

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Re: Blower being affected by creosote
« Reply #2 on: April 10, 2015, 01:21:12 PM »

I finished putting this together last night the flap using a solenoid did not get out of testing phase so I opted for a butterfly valve I tried the selonoid on the butterfly but it did not have enough power so i switched to the honneywell actuator it's slow but super powerful.

I keep getting "The upload folder is full. Please try a smaller file and/or contact an administrator." so back to PB
http://s737.photobucket.com/user/flaughs2000/media/Gassifer/IMG_8307_zpscefwtzmz.jpg.html
http://s737.photobucket.com/user/flaughs2000/media/Gassifer/IMG_8308_zps33hcmvwd.jpg.html

Thanks for the help slimjim
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slimjim

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Re: Blower being affected by creosote
« Reply #3 on: April 11, 2015, 04:30:23 AM »

Where is your blower mounted ? Try to tip your blast tube toward the burn chamber a bit so creosote can't flow uphill to the damper and blower, also check the actuator, I think it has an end switch that would allow you to keep the blower off until the damper is fully open!
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Jeremy.flaugh

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Re: Blower being affected by creosote
« Reply #4 on: April 11, 2015, 06:42:04 AM »

Its right on the front door.
http://s737.photobucket.com/user/flaughs2000/media/Gassifer/Inside%20front%20door_zpsgzf8go9t.jpg.html
The old design
http://s737.photobucket.com/user/flaughs2000/media/Gassifer/Front%20blower_zpsi2o8g7fb.jpg.html

There is no slope on the blast tube going thru the door I built this design before before you suggested it I would have done that though it's a good idea I'm going give it a try as-is. If or when the butterfly gets gummed up I'll do some surgery on the door slope everything inward.

Regarding the actuator I can see spots on the circuit board for the end limit switch but my model does not have it so the blower will struggle thru the 15 seconds it takes to open.
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