Baghouse Maintenance for NESHAP Baghouse Maintenance for

Baghouse Maintenance for NESHAP Baghouse Maintenance for

Baghouse Maintenance for NESHAP
Compliance
BWF America Inc. | USA
Date | Project Designation | 1
Baghouse Cleaning
Time vs On-demand
BWF America Inc. | USA
Date | Project Designation | 2
Baghouse Cleaning Controls
BWF America Inc. | USA
Date | Project Designation | 3
Start
Up / Shut
Down
Start-Up
Shut-Down
•Avoid prolonged dew point exposure
•Avoid over-cleaning the filter bags
•Start with a clean take away system
BWF America Inc. | USA
Date | Project Designation | 4
Baghouse Monitoring
The Average Plant
Emissions
Differential Pressure
BWF America Inc. | USA
Date | Project Designation | 5
Baghouse Monitoring
What we should monitor:
•Differential pressure
Emissions
•Emissions
•Cleaning cycles
•Cleaning air pressure
•Cleaning system operation
•Temperature
•Material
M t i lh
handling
dli equipment
i
t ((airlocks)
il k )
•Hopper levels
BWF America Inc. | USA
Date | Project Designation | 6
Maintenance
•Reaction time
•Documentation
•Root Cause
•Corrective
C
ti action
ti
BWF America Inc. | USA
Date | Project Designation | 7
Maintenance
Reaction Time
Emissions = Clean side contamination
Hopper
pp levels,, cleaning
g system,
y
, differential p
pressure,,
temperature = Bag failure
BWF America Inc. | USA
Date | Project Designation | 8
Maintenance
Documentation
What and Where?
BWF America Inc. | USA
Date | Project Designation | 9
Documentation
BWF America Inc. | USA
Date | Project Designation | 10
Maintenance
Root Cause
WHY?
BWF America Inc. | USA
Date | Project Designation | 11
Maintenance
Corrective Action
So it doesn’t happen
pp again
g
!!
BWF America Inc. | USA
Date | Project Designation | 12
Filter Bag Replacement
•Predictability
•On-line vs off-line
•Partial vs Full replacement
BWF America Inc. | USA
Date | Project Designation | 13
Filter Bag Replacement
Predictability
• Record keeping
• Monitoring
• Filter bag
g testing
g
BWF America Inc. | USA
Date | Project Designation | 14
Filter Bag Selection
•Bag
g Life
•Differential Pressure (energy consumption)
•Efficiency
BWF America Inc. | USA
Date | Project Designation | 15
Filter Bag and Cage Options
Keep it simple
K
i l – Snap
S
band
b db
bag, one piece
i
cage with
ith builtb ilt
in venturi.
Avoid multiple piece cages (If you don’t believe me, ask
any plant that has them)
BWF America Inc. | USA
Date | Project Designation | 16
System Design
Bag
operation
mpered greatly
duct
BWF America Inc. | USA
Baghouse operation
hampered greatly by the
duct design.
Date | Project Designation | 17
Filter Bag Installation – Reverse Air
Step
Top Installer
1
2
Place box on floor beside
thimble.
thimble
Drop fishing line down
from top.
3
4
Open box,
box take out bag
bag,
attach fishing line
hook to the cap.
Pull bag
g up
p to top
p by
y
fishing line, attach to
tensioning assembly
orienting seams 45
deg.to
g
walkway
y
5
6
BWF America Inc. | USA
Bottom Installer
Attach bottom of filter bag
to thimble, orienting seams
45 deg. To walkway
Tension the filter bag to
appropriate #tension
Date | Project Designation | 18
Clamp-to-bag assembly
Bag over bead
Clamp
Thimble
Bag cord
BWF America Inc. | USA
Date | Project Designation | 19
g Install – Pulse Jet
Filter Bag
•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.
used
•Once the filter bag is in the tube sheet, follow standard snap band installation
instructions.
•Do
Do not force snap bands into the tubesheet (NO HAMMERS).
HAMMERS) If the snapband
does not fit contact BWF. Once bags are snapped in the tubesheet DO NOT
walk on the snap band tops.
•When installing
g the cages,
g , make sure a vertical wire is in the crease of the
bag.
•DO NOT force cages into the bags by standing on them.
BWF America Inc. | USA
Date | Project Designation | 20
Filter Bag Installation – Pulse jet
BWF America Inc. | USA
Date | Project Designation | 21
Thanks for Your Attention
BWF America Inc. | USA
Date | Project Designation | 22