Re: Shaker Vs. Reverse Jet
My recommendation would be to bite the bullet and install a pulse jet dust collector. This is because of the very high dust loading on the filter bags. Shaker bags will clog up very fast because of this high dust loading and thus would require replacement very often.
Filtration technology behind shaker type bags is "ancient" and was replaced by high pressure pulse jet blow back technology in the early 60's. To save on invesrtment, you may consider renting a compresssor instead of buying one.
Regards,
A. T. Agarwal
Consulting Engineer
Pneumatic Conveying Consultants
polypcc@aol.com
www.powderandbulk.com/pcc ■
Jet Pulsing
I would have to agree, that the jet pulsing is by far in the best interest of prolonging equipment reliability.
We use this same system @ my plant in the loading of Alumina.
Yet what we have found is that the use of cartridge type filtration in conjunction with the jet pulse does give us the best run from our equipment.
Maintenance on the cartridges is by far better for the operator then the sock type.
Just my 20 cents worth. ■
Re: Shaker Vs. Reverse Jet
You may like to read my article "Design Guide for Dust Collectors" in the February 2005 issue of Chemical Engineering. This article describes various types of dust collectors, how they designed, and in what applications they should be used.
Regards,
A. T. Agarwal
Consulting Engineer
Pneumatic Conveying Consulting Services LLC
Email: polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Shaker Vs. Reverse Jet Dust Collector.
A shaker dust collector will always be physically larger than a pulse unit of similar capacity. Maintenance will also be higher (mechanical parts wearing). Pulse cleaning is best.
Make sure the compressed air is clean and DRY, otherwise the bags will be blinded prematurely. Run the cleaning system for 30 minutes after the system is shut down. Be conservative with the filtering velocity. Do not store the collected dust in the dust collector hopper, transfer to a disposal truck or waste skip.
Cartridges do not last as long as filter bags and replacement cost is much greater.
Michael Reid. ■
Shaker vs. reverse jet
Dear all
Our company has currently ordered a shiploader that has a complete dust supression system.
The material being handled is either cement or clinker.
I would like to know if the bag house should have a reverse jet (which means that we need to purchase a compressor since it isnt available on the berth) or just simply a shaker.
What are the pros and cons of both systems? and if I choose the cheaper option (which is not spending money on a compressor) would I end up regreting it.
Please note that the loading of a vessel can take anywhere between 2 days to a week depending on the vessel size. During this period we would like to avoid having any downtime due to equipment failure (i.e. changing/cleaning of socks because it is clogged with dust).
best regards ■