Jaguaretei Posted July 19, 2019 Report Share Posted July 19, 2019 I'm always very curious to know more about this flue exit which is along the kiln as a channel in the ground. I do not know how to name it and also never found information about it. Would anyone know how to name it? It seems to be very common among Japanese industrial downdraft kilns. And looks very interesting to the draft. Sorry for poor English. Link to comment Share on other sites More sharing options...
Bill Kielb Posted July 19, 2019 Report Share Posted July 19, 2019 To me it’s a flue regardless of position and the design is downdraft, updraft, forced draft, induced draft ...... My background in combustion is more towards, stokers, boilers, and incinerators though. Interestingly, the atmospheric downdraft kilns rely on a chimney height and size sufficient to induce the draft evenly down and out of the kiln, meaning they create suction if you will. Industrial equipment often uses fans sized for the amount of combustion to precisely remove (draw out) the right amount of flue gasses for efficiency reasons. In forced draft equipment (power burner) we often simply refer to it as an exhaust stack. There may be a kiln specific name to the geometry, I only know it as a flue though. Also, sorry I don’t think my English was all that clear now that I read back through it. Link to comment Share on other sites More sharing options...
Mark C. Posted July 19, 2019 Report Share Posted July 19, 2019 Its called a downdraft kiln and yours is car kiln in 1st photo and the exit hole is known as a flue Link to comment Share on other sites More sharing options...
liambesaw Posted July 19, 2019 Report Share Posted July 19, 2019 It's just a flue to me, hard to tell where the burners will be on those kilns, I'm guessing on the bottom pointing up? In each corner? I'm trying to figure out how the air will move through there and the reason for such a tiny flue opening. Must have a really tall chimney to suck 4-6 burners worth of flame through that small opening! I have seen similar channels in some salt kilns, but instead of being a flue, they were for holding molten salt and made to be replacable. Link to comment Share on other sites More sharing options...
Bill Kielb Posted July 19, 2019 Report Share Posted July 19, 2019 10 minutes ago, liambesaw said: It's just a flue to me, hard to tell where the burners will be on those kilns, I'm guessing on the bottom pointing up? In each corner? I'm trying to figure out how the air will move through there and the reason for such a tiny flue opening. Must have a really tall chimney to suck 4-6 burners worth of flame through that small opening! I have seen similar channels in some salt kilns, but instead of being a flue, they were for holding molten salt and made to be replacable. In the top picture, looks like four burners with a bag wall of sorts each side. The bottom picture might have a hinged door on the right side, so not sure if this will be a car kiln in the end, Interesting! The top kiln uses structural firebrick as a lintel for the flue, the bottom, not sure. More interesting! Link to comment Share on other sites More sharing options...
liambesaw Posted July 19, 2019 Report Share Posted July 19, 2019 I see the burner hole on the top one now ,I'm guessing the bottom one has 6 burners, one under each of those yellow bricks? Man that's gotta have a huge chimney! Link to comment Share on other sites More sharing options...
Bill Kielb Posted July 19, 2019 Report Share Posted July 19, 2019 2 minutes ago, liambesaw said: I see the burner hole on the top one now ,I'm guessing the bottom one has 6 burners, one under each of those yellow bricks? Man that's gotta have a huge chimney! Pilot lights, 2000 btu each. Lol Link to comment Share on other sites More sharing options...
Mark C. Posted July 19, 2019 Report Share Posted July 19, 2019 You right about its not a car kiln -my mistake I thought I saw tracks and that handle on a car but the second photo shows a regualr hinged door and the floor is solid and not coming out. Link to comment Share on other sites More sharing options...
Bill Kielb Posted July 19, 2019 Report Share Posted July 19, 2019 @Mark C. @liambesaw Love the cone collection on top of the top kiln. Where’s Waldo? Link to comment Share on other sites More sharing options...
CactusPots Posted July 19, 2019 Report Share Posted July 19, 2019 Besides a tall chimney, a downdraft can be vented by venturi into the flue box. Mine has venturi out of the kiln itself and another into the 4 ft chimney. It pulls nicely from about 200 degrees. Link to comment Share on other sites More sharing options...
neilestrick Posted July 19, 2019 Report Share Posted July 19, 2019 I've always heard it call a flue channel. It helps prevent a cold spot at the back of the kiln where the flue opening usually is. Link to comment Share on other sites More sharing options...
Babs Posted July 20, 2019 Report Share Posted July 20, 2019 On 7/19/2019 at 3:26 PM, Mark C. said: You right about its not a car kiln -my mistake I thought I saw tracks and that handle on a car but the second photo shows a regualr hinged door and the floor is solid and not coming out. Two different kilns byblook of pottery floor Link to comment Share on other sites More sharing options...
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