Re: Shaker Vs Reverse Pulse
Personally, I would only use a shaker filter if I didn't have HP air available or there was a particular issue with a reverse jet pulse. The risk of emission of a toxic dust on a sack emptying filter if the fan fails on a revese pulse filter possibly?
I am not aware of any benefit in a shaker compared with a reverse pulse when filtering damp process air. I would have expected a reverse pulse to be better than a shaker for this duty but i have no experience to back that up.
Does your supplier mean damp HP air? If the plant HP air was wet, you may be better with a shaker filter than operating a reverse pulse filter but I would suggest drying the HP air if possible. ■
Re: Shaker Vs Reverse Pulse
The pulse air is dry. I was refferring to the dust air.
Thanks for you response.
It agrees with what I thought.
I have heard that sometimes with very very fine dust a shaker is used.
It is set to give a very gental shake allowing the product to stay caked. If a reverse pulse was used the product breaks up into a dust cloud not falling into the hopper.
Best Regards,
Gareth Blakey
gareth.blakey@minproc.com.au ■
Re: Shaker Vs Reverse Pulse
A shaker type collector should not be cleaned "on-line" which means if you have a continuous operation a reverse jet pulse collecor is the way to go.
If you have a batch type operation and you can clean when the batch is over, then a shaker would be suitable.
If the incoming air is damp, then I would expect both designs to have a similar problem with caking on the bags. ■
Shaker -V- Reverse Pulse
Shaker bagfilters are “old fashioned” these days, mainly for economic reasons. Lower filtering velocity means more cloth area and larger installations.
Moist compressed air will cause problems for pulse cleaning filters but there is no reason for poor quality air if the proper precautions are taken.
Servicing and maintaining pulse cleaning units is easier and safer. Changing filter bags is done in open air. Shaker bags are changed in confined space conditions. Shaker mechanism maintenance is labour intensive.
Shaker units were generally considered to be “kinder” to filter bags and were thought more suitable for fine metallurgical fume. Modern filter materials make pulse units much more competitive today.
Damp process air is not an insoluble problem for either system, given proper design.
Michael Reid. ■
Shaker -V- Pulse
Gareth,
Your last post tells me that your filter salesman does not understand bagfilters.
Michael Reid. ■
Re: Shaker Vs Reverse Pulse
The product is Municipal Waste.
It may be possible that dust from this product acts in a strange way.
But I am guessing not. He prob had a problem with a pulse filter once in this application and missunderstood the reason.
This is not his primary supply item. He sells windsifters.
Best Regards,
Gareth Blakey ■
Shaker vs reverse pulse
Dear all,
In what situation would you use a shaker system over a reverse pulse system.
I ask this question as I have a supplier who claims that a reverse pulse system will not work with moist air while a shaker system will.
Has anyone had experince with this?
Best Regards,
Gareth Blakey
gareth.blakey@minproc.com.au ■