what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
(OP)
Hi,
from this link one of the purposes is reduced a noise Link,
but what kind of noise? why its needed for inlet air conveying of fly ash from economizer hopper,
Thanks.
from this link one of the purposes is reduced a noise Link,
but what kind of noise? why its needed for inlet air conveying of fly ash from economizer hopper,
Thanks.





RE: what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
however my guess is that you have a high pressure air supply? which is needed to reduce in pressure?
If you have only one orifice plate with a small hole the air will or is at sonic velocity. That makes a LOT of noise at a high frequency.
Putting a number of plates in series means each one can operate at a velocity at the orifice of less than sonic hence lower noise.
If this is actually for the air with fly ash in it then I can only imagine that they want to keep the velocity down to reduce erosion.
give us a bit more to work on and we might have a different response...
Remember - More details = better answers
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RE: what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
RE: what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
RE: what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
Also depends on the area ratio of orifice to duct as the sonic jet might take a little time to slow down.
Can you give us any more background to this?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: what is the purpose of restriction orifice multi holes in fly ash air pneumatic conveying systems
Is the question: Why are multiple nozzles used in some ejector pump designs rather than a single nozzle?