Baghouse Tips with Dr. Vent Goode

Is your material handling collaborating with your ventilation system?


We talked about the importance of proper enclosures in conveyor transfer points.  However, there are many cases where enclosures are properly designed and there’s adequate ventilation, yet dusting soon becomes a problem.  The ventilation system always takes the blame, but is the problem really due to poor ventilation?

Engineers in charge of material handling design often design chutes and loading points without considering the long term impact on the ventilation system.

Take the loading of a belt.  If the chute and loading point are poorly designed, the enclosure seals are soon worn out.  A resulting gap between the enclosure and the belt adds to the open area originally considered by the designer, which proportionally reduces the ability of the ventilation system to suction fugitive dust emission.  In more extreme cases, transported material even shoots out of the enclosure, leading to excess dusting and material accumulation nearby.  Yet the ventilation system is blamed for the mess.

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So what to do?  Two simple solutions in conveyor loading include muckshelves and rockboxes.  These minimize impact and wear on the conveyor and center the material loaded on the conveyor, extending the life of the enclosure seals and maximizing the performance of the ventilation system.


Rockboxes and muckshelves are not part of your ventilation system, but can sure have an impact on its performance.

Needs editing 2Belt-Conveyor

Call one of our expert engineers to discuss your application and possible improvements.

Dr Vent Goode

Baghouse Tips with Dr. Vent Goode

Baghouse Tips with Dr. Vent Goode – Are Your Enclosures Properly Designed?

Enclosures should efficiently cover the area of dust generation. Although they don’t look like they are even a part of your ventilation system, they are absolutely required, and their design is extremely important for the overall performance of your air pollution control equipment.

If you could completely enclose a source of dust generation, no ventilation would be required simply because there would be no openings where dust could escape. From this statement we can generally conclude that the more you enclose a source of dust generation, the more you reduce dust emissions problems. This is true, but there are limitations that need to be considered.

Take a belt conveyor transfer point, where dust is generated mainly where the material impacts the conveyor being loaded. An enclosure contains the cloud of dust, but the transfer cannot be sealed because openings are required for material to enter and exit the enclosure. So your installer hangs rubber skirting down to the belt surface in an attempt to eliminate all openings. This is a problem because the skirting then drags on the conveyed material, creating an additional point of dust generation and greatly affecting the performance of your air pollution control equipment.

Proper design guidelines recommend a 2” clearance between the skirting and the material conveyed. Sure, that’s an opening, but it’s a necessary opening. The ventilation system is designed to pull ambient air through these controlled openings, and it is this incoming ambient air that keeps fugitive dust from escaping. The incoming air sweeps fugitive dust to the baghouse, which is exactly what your ventilation system should be doing, keeping fugitive dust from escaping, not suctioning conveyed material.

Enclosure design is critical for the performance of your system and can be the main reason for poor performance in a ventilation system. Details vary greatly depending on the application and sometimes these details can be counter-intuitive, so count on experienced IAC engineers to help you optimize your installation for maximum performance.

Dr. Vent Goode


Story of a Baghouse and the Quick Quote Configurator

A case study on how IAC’s Quick Quote Configurator can save time and money


Upon repurposing an existing silo to handle a new material, this large midwestern cement plant looked to IAC to help find a solution for their dust collection needs. Utilizing IAC’s Quick Quote Configurator our team was able to quote and deliver a new, high efficiency pulse-jet dust collector within 5 weeks of receipt of a purchase order.

This particular project presented some unique challenges that our service crew had to overcome. The plant’s old shaker style dust collector was housed at the top of a 180ft silo.

Service team members first had to remove the roof of the housing in order to access to the old collector.

In order to repurpose the unused silo, this cement plant wanted to also insure that their dust collection met the new NESHAP requirements. Removing the old shaker collector would improve filtration efficiency and decrease maintenance costs.

The existing shaker dust collector was placed on a flatbed and removed for proper disposal.

IAC’s custom dust collector being hoisted into position.

Another unique challenge for this project were the space constraints. IAC’s Quick Quote Configurator was able to accurately meet the sizing requirements within inches of the confined quarters of the silo housing.

The new pulse-jet collector was carefully lowered into place a top the 180ft. silo.
Lowering the new dust collector into its final position. A tight fit that needed to be assessed accurately and efficiently to meet IAC’s scheduled completion date.

Now complete, this large cement company will no longer have to worry about filtration efficiency or meeting the new NESHAP requirements. IAC’s Quick Quote Configurator was able to exceed our clients expectations and deliver a new high efficiency customized dust collector in 5 weeks. Presented with unique challenges our team was able to accurately assess the specific needs of our client and give a personalized solution to their dust collection problems.


IAC News

IAC Mitigates Frac Sand Exposure at Well Sites

Industrial Accessories Company was asked to provide nuisance dust collection add-on equipment to a fleet of sand movers operating in the Marcellus Shale play. The equipment was made mobile to allow rapid deployment along with the sand movers.

The installation was developed to address concerns related to controlling dust generation created during pneumatic filling of the sand movers. Removing harmful particulate from the air benefits overall health and safety for all operating personnel at a Frac site. The collection system allows for up to seven pneumatic trailers to fill the sand movers simultaneously. IAC can design and supply equipment into new Frac sanding systems or retrofitted to existing equipment. Read more about IAC Frac Sand Technology here.

IAC Dust Collector Mitigates Frac Sand Exposure at Marcellus Well Sites

IAC Air Pollution Control for Marcellus Shale Frac Sand Well
Baghouse Tips with Dr. Vent Goode

Baghouse Tips with Dr. Vent Goode – Is your team focusing on the real solution?

You know your baghouse, right? And you know it has problems. Emissions problems, baglife problems, poor ventilation problems.

So your crew changes the filter bags and things improve, but the problem soon returns. So you have them change filter bags again. It is not a pleasant job, but your guys get it done. Maybe you question the quality of the filter bags. You may even consider changing your filter bag supplier. But is it the bags?

Yes, the filter bags are the heart of your baghouse, but they are as very small part of your ventilation system, which is a large and complex group of components that go way beyond the baghouse.

A ventilation system has the following basic components:

  1. Enclosures
  2. Hoods
  3. Ductwork
  4. Flow distribution system
  5. Baghouse
  6. Dust discharge system
  7. Outlet ductwork
  8. Fan
  9. Stack

Filter bags are not even on the list, as they are only one part of the baghouse, which is just one component of your system. Yes, bags are an important, but they’re only a small part of your overall system.

Poor design or performance coming from any of the above components can create significant problems in your system. And it’s likely that the real problem is affecting your filter bags, but is not due to the filter bags.

IAC can help you pinpoint the source of your problems so you can focus on a real solution. Who knows, you may improve ventilation performance and double or triple your filter bag life as a result.

Call one of our sales engineers today at 1.913.384.5511 for a real solution to your problem, or contact us via the web.

-Dr Vent Goode