Hey Folks,
This grate nozzle thingy, Tone has come up with, is a really big deal.
I didn’t know how it worked, really, just by looking at his sketch, but then as I added it to my own drawing I realized what is going on. When his char bed is good and gas can flow through it easily, the nozzle he has put in the grate flows very little air. Just because of Bernoulli effect the air rushing past its underside might even create a slight vacuum. But when the char bed becomes tight, and gas doesn’t flow through it as easily, that grate nozzle starts to flow a lot of air. This will, naturally, burn up the char in that area and allow the material in the restriction to settle, thus a fresh and probably looser char bed. This sets up a dynamic balance of flows between the main nozzles and the grate nozzle. This is a self regulating char bed maintenance system. If designed well I think there will be little need for vacuum gauges in the cab. This is a big step forward for reliability and ease of use.
Rindert
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