Optimize the performance of your collector

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How to ensure optimal collector performance

Avoid Problems and Optimize Your Baghouse Performance

Under performing pulse jet baghouses are usually the result of high dust loading, inefficient cleaning systems – or a combination of both. Left unchecked, these problems can result in process bottlenecks and increased operating cost. Below are some steps you can take to avoid this from happening. If you need assistance, we have the unique expertise to identify and solve baghouse problems.

Recommended Operating Parameters

Pressure                             90-100 PSI
Frequency (off time)          20 seconds
Duration (on time)             150 milliseconds

Reservoir
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Poor filter cleaning can be the result of undersized or restricted cleaning system components. It is important to make sure that there are not any restrictions starting from the compressor all the way to the reservoir. Also, ensure that your header tank size match your cleaning requirements.

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Ensure better cleaning with tanks that are kept free of moisture and debris as they can substantially impact the ability to clean the filters.

Pulse Frequency
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The pulsing frequency can never be any faster than the reservoir can recover to full pulsing pressure.

Pulse Sequence

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The pulse sequence should be adjusted to ensure that newly cleaned filters do not take in dust from the neighboring filter being pulsed. Staggering the firing order helps reduce cross contamination.

Hopper

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The hopper should not be used for storage. Evacuation equipment (rotary valves, screw conveyors, etc.) should be sized to unload hopper before accumulation occurs. Units with slide gates should be left open and equipped with sealed drum adapters.

Emission/bleed through

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Depth    vs     Surface

Due to emission regulations sometimes forcing a change of filter media, still more dust collector owners seize this opportunity to upgrade to a more efficient filter media, which helps filtering even the smallest particles thereby providing users the potential to recycle more of their valuable product and meet the required reduced emissions requirements.To reduce emission/bleed through, advantages can be achieved by upgrading from filter bags to pleated
bags with spunbond media or spunbond with ePTFE membrane.

When it comes to reducing emission/bleed through, great advantages can be achieved by changing to pleated bags with spunbond media as opposed to using woven filter bags. The reason is the different filtering method. Filter bags are a depth filtration filter whereas pleated bags is a surface filtration filter.


Choice of media
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All dust types have specific characteristics and requires different handling. Therefore, it is often not enough to use a polyester media. Purchasing a more costly treated/coated media (for example ePTFE coating or antistatic surface) often turns out to be profitable as a result of better pulse cleaning.Some of the factors that influences the right choice of media are humidity, temperature, conductivity and acid. Read more about Midwesco Filter Resources/TDC Filter’s filter media solutions for your industry>

Airflow

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Several issues can cause reduced air flow in the dust collector. The most common problem is the balance
between the cleaning of filters and the air flow. These factors strongly influence the cleaning process and to elimate this, maximizing the air flow is important. If you need to handle more ACFM, more filter area is required.Some customers choose to purchase larger filter bags or a new dust collector with more filter bags. Others choose a pleated bag solution which increases the filter area.The balance between air load and filter media area is called Air-To-Cloth ratio.

Drop out box

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The drop out box is the distance between the bottom of the fi lters and the hopper. The larger the distance, the better are the conditions for the heavier dust particles to be filtered from the airflow before hitting the filter surface and tear on it.To optimize the drop out box, install pleated bags which are
shorter, but have a larger filter area.

Please notice: These are general operating parameters.  Some collectors operate successfully under much more marginal settings and some collectors fail under more conservative settings.  Above recommendations are good starting points, but every dust collector and application has unique operating conditions.