Trace Heating Of Ducting
Depends on where the worst problem exists. Heating the hopper will prevent condensation in the baghouse and protect the fiter bags from clogging. It will save the expense of frequent bag changes and down time.
Similarly for the ducting, saving frequent blockages and downtime. Heating the ducts only will not prevent condensation in the baghouse. Expense will depend on how much heat you have to put in.
Michael Reid. ■
Re: Trace Heating Of Dust Control Ductings
Michael,
Thank you for the advise. I would like to ask another question. The pick-up point in the mixer had a vent(window type) wherein the position is facing the duct. Actually, you can see the window pulled toward the opening of the duct and sucking up fresh air. Do this condition contribute also to premature condensation of water vapor in ductings? Can you suggest an alternative design?
Thank you very much!
regards,
Ham ■
Trace Heating Of Ducting
No. The atmospheric air will have lower absolute humidity than the mixer air. The 'system' needs somewhere for exhaust air to get in. If the mixer is fully sealed, this is probably what the 'window' is for.
Michael Reid. ■
Re: Trace Heating Of Dust Control Ductings
Hi Ham,
The window is a vcauum relief vent to ensure that there is adequate air flow thru the de-dusting ductworks.
If it was not there..then the air flow thru the ducts is not know and may be low enough to cause more drop out/settling.
Perhaps U can send us / post us some photos of the system to show what you have.
You have increased the batch by 40%.....is the batch time the same > then we may have 40% more dust loading.
If batch time is 40% longer..then dust load is same...just operates longer.
Just where is the clogging in the bends - is it after the bends...this may indicate areas of low velocity etc....
What are the details of the bends...??
The system should not clog..we just need to ID the cause and then work on a fix.
Cheers
James ■
Trace heating of Dust Control Ductings
Hi!
I posted a thread a month ago regarding frequent clogging in dust control elbows. After reading the replies and doing some research, I have decided to trace heat the dust control system. But based from my research, trace heating is usually done on hopper of baghouse. I think that this would entail high cost and I would like to ask if it is ok to trace heat the elbows or ducting instead of hopper. Is it enough to keep water and fumes in vapor state from mixer to exhaust of baghouse? Or will it have small effect?
regards,
Ham ■