baghouse maintenance for neshap compliance

Baghouse Maintenance for NESHAPBaghouse Maintenance for NESHAP Compliance

BWF America Inc. | USA Date | Project Designation | 1

Baghouse CleaningBaghouse Cleaning

Time vs On-demand


Baghouse Cleaning ControlsBaghouse Cleaning Controls


Start-Up / Shut-DownStart Up / Shut Down

•Avoid prolonged dew point exposure

•Avoid over-cleaning the filter bags

•Start with a clean take away system


Baghouse MonitoringBaghouse MonitoringThe Average Plant

Emissions

Differential Pressure


Baghouse MonitoringBaghouse MonitoringWhat we should monitor:

•Differential pressure•EmissionsEmissions•Cleaning cycles•Cleaning air pressure•Cleaning system operation•TemperatureM t i l h dli i t ( i l k )•Material handling equipment (airlocks)

•Hopper levels


MaintenanceMaintenance•Reaction time

•Documentation

•Root Cause

C ti ti•Corrective action


MaintenanceMaintenance

Reaction TimeReaction Time

Emissions = Clean side contaminationEmissions = Clean side contamination

Hopper levels, cleaning system, differential pressure, pp , g y , p ,temperature = Bag failure



DocumentationDocumentation

What and Where?What and Where?


DocumentationDocumentation



Root Cause

WHY?



Corrective ActionCorrective Action

So it doesn’t happen again !! pp g


Filter Bag ReplacementFilter Bag Replacement

•Predictability

•On-line vs off-line

•Partial vs Full replacement•Partial vs Full replacement


Filter Bag ReplacementFilter Bag Replacement

Predictability

• Record keeping

• Monitoring• Monitoring

• Filter bag testingg g


Filter Bag SelectionFilter Bag Selection

•Bag Lifeg

•Differential Pressure (energy consumption)

•Efficiency


Filter Bag and Cage OptionsFilter Bag and Cage Options

K it i l S b d b i ith b iltKeep it simple – Snap band bag, one piece cage with built-in venturi.

Avoid multiple piece cages (If you don’t believe me, ask any plant that has them)


System DesignSystem DesignBag operation

mpered greatly Baghouse operationhampered greatly by the

duct duct design.duct duct design.


Filter Bag Installation – Reverse AirStep Top Installer Bottom Installer

1 Place box on floor beside thimblethimble.

2 Drop fishing line down from top.

3 Open box take out bag3 Open box, take out bag, attach fishing line hook to the cap.

4 Pull bag up to top by g p p yfishing line, attach to tensioning assembly orienting seams 45 deg.to walkwayg y

5 Attach bottom of filter bag to thimble, orienting seams 45 deg. To walkway


6 Tension the filter bag to appropriate #tension

Clamp-to-bag assemblyBag over bead

Clamp

ThimbleBag cord


Filter Bag Install – Pulse Jetg

•Do not take the filter bags out of the boxes until you are ready to install them in the tube sheet.•Installation sleeves must be used•Installation sleeves must be used. •Once the filter bag is in the tube sheet, follow standard snap band installation instructions.•Do not force snap bands into the tubesheet (NO HAMMERS) If the snapbandDo not force snap bands into the tubesheet (NO HAMMERS). If the snapbanddoes not fit contact BWF. Once bags are snapped in the tubesheet DO NOT walk on the snap band tops.•When installing the cages, make sure a vertical wire is in the crease of the g g ,bag.•DO NOT force cages into the bags by standing on them.


Filter Bag Installation – Pulse jetFilter Bag Installation Pulse jet


Thanks for Your Attention


baghouse maintenance for neshap compliance

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