Australasian Agent for
Total Air Pollution Control -
Company Profile
Total Air Pollution Control -
Company Profile
Australasian Agent for
Australasia’s Leading Supplier of Upgrades, New Units and Replacement Parts/Services for Industrial APC Equipment
EvaporativeGas
Conditioning
EvaporativeGas
Conditioning
Electrostatic PrecipitatorsElectrostatic Precipitators
Fabric FilterCollectors (Baghouses)
Fabric FilterCollectors (Baghouses)
Australasian Agent for
Customer BaseMostly Heavy Industrial with some Light industrial.
Our main customers are in the following industries:
• Coal Fired Power Stations• Cement and Lime• Paper Mills• Steel• Metallurgical (Nickel, Zinc, Lead, Gold, Copper, Aluminium)• Alumina
Australasian Agent for
• Filter bags and cages
• Fine filtration products
• Baghouse accessories
• Acoustic horns
• Emissions monitors
• Electrical controls & software
• ESP mechanical parts
• Evaporative gas conditioning systems
BHA-TEX®
PulsePleat®
Powerwave ™
CPM ™
SQ-300 ™
Innovative Products from GESolutions for all OEM styles
Australasian Agent for
Latest innovations
ThermoPleatHigh Temp ElementsThermoPleat
High Temp Elements
STS Tubular FiltersSTS Tubular Filters
Juice Can ESP Power MaximiserJuice Can ESP Power Maximiser
RDE Rigid Discharge Electrodes
RDE Rigid Discharge Electrodes
Australasian Agent for
• Troubleshooting Expertise
• Responsive to customer problems
• Inspections and Installations
• Engineering / CAD
• New Units, Upgrades, Rebuilds
(Baghouse, ESP, EGC)
• Training Seminars
• After sales service
End user focused services
Australasian Agent for
ESP Rebuilds + New Units
BlueScope Steel, Port Kembla Lurgi ESP
Holcim, Westport NZ
SF ESP rebuild
Experience across all industries
All makes and types of ESP
Proven value adding designs
Visy Paper, NSWFLS precipitatorNickel West ESP rebuild
BHP Billiton Olympic DamAcid Mist ESP
Australasian Agent for
Bagfilter Rebuilds + New Units
Experience across all industries
All makes and types of bagfilter
Technical edge over our opposition due to GE products
BCSC BerrimaCoal Mill Bagfilter
BlueScope SteelNo.5 Blast Furnace Stockhouse Bagfilter
Australasian Agent for
TAPC Headquarters
Head office Wollongong, NSW
Regional office Perth WA
800m2 Warehouse, 200m2 office space
Regional office Singapore
Regional office Philippines
Australasian Agent for
GE Energy Corporate Headquarters
• Kansas City, Missouri USA
TAPC – Australasian Distributor for GE Energy(formerly BHA Group Inc.)
Australasian Agent for
Innovative Filtration TechnologyInnovative Filtration Technology
Total Air Pollution Control Pty Ltdwww.tapc.com.auwww.tapc.com.au
Electrostatic Precipitators
Fabric FilterCollectors (Baghouses)
EvaporativeGas
Conditioning
BHA-TEX®PulsePleat®
Powerwave ™
Acoustic Cleaners
ThermoPleatHigh Temp ElementsThermoPleat
High Temp ElementsSTS Tubular FiltersDCE Vokes replacements
STS Tubular FiltersDCE Vokes replacements
ESP Advanced Automatic Voltage Controls - SQ-300 ™ Juice CanTM
For TRUE DC
Troubleshooting Expertise
Expert sales and technical support
Upgrades and rebuilds
The Air PollutionControl Experts
Toll Free 1800 424 269
Air Pollution Control (APC) Terminology
•TAPC
Australasian Agent for
ACFM (Actual) vs. SCFM (Standard)
ACFM
Measured at:
•Actual temperature
•Actual elevation
•With moisture
SCFM
Calculated at :
•70°F
•Sea level
•Dry
Australasian Agent for
ACFM
• Actual Cubic Feet of gas per Minute
• The volume of the gas flowing per unit of time at the operating temperature, pressure and composition.
• (also measured in cubic meters per hour)
Australasian Agent for
Calculating ACFM from SCFM
ACFM = SCFM x (Actual Temp. + 460° F)
530° F
Temperature Correction
ACM/HR = NCM/HR x(273° C + Temp)
273° C[ ]
Australasian Agent for
Air-to-cloth ratio = acfm÷total filter area
(Filter dia. X length x 3.14) = filter area
Total # filters x filter area = total filter area
Air-to-Cloth calculations
Australasian Agent for
Air-to-Cloth ratio (filter rate)
Type of Filter Maximum RecommendedCleaning System Air-to-Cloth Ratio
Shaker 3.0 0.91
Reverse Air 2.5 0.76
Pulse-Jet:
A. Cylindrical Filter Bags 6.0 1.83
B. Pleated Filters (Non-Paper Media) 3.5 1.07
C. Pleated Filters (Paper Media) 2.0 0.67
Imperial Metric
Australasian Agent for
Can velocity• In a pulse jet dust collector with
the filter elements suspended from the tubesheet, Can Velocity is the upward air stream speed passing between the filters calculated at the horizontal cross-sectional plane of the collector housing at the bottom of the filters.
Australasian Agent for
6:1 AC Ratio
8' bags
6:1 AC Ratio
10' bags
6:1 AC Ratio
12' bags
6:1 AC Ratio
6' bags
Can velocity
Australasian Agent for
6:1 AC Ratio
12' bags
6:1 AC Ratio
8' bags
6:1 AC Ratio
10' bags
6:1 AC Ratio
6' bagsPoint of measuring can velocity (bag bottom)
L
W
Can velocity
Australasian Agent for
Grain loading
• The amount of particulate by weight in a given volume of air, usually specified in grains/cubic foot (or grains/cubic meter).
1 lb (0.454 kg) = 7000 grains1 kg = 15,432 grains
Australasian Agent for
Collection efficiency
Efficiency = 15 Grains - 0.01 Grains = 99.93%15 Grains
Example:Inlet Dust Load = 15 GrainsOutlet Emission = 0.01 Grains
Efficiency = Inlet Dust Load - Outlet Emission Inlet Dust Load
@ 5 grain inlet load = 99.80%
Australasian Agent for
Magnehelic® gauge
• An instrument used to measure the differential pressure drop in a baghouse.
Australasian Agent for
Water Gauge (w.g.) or Water Column (w.c.)• A measure of the pressure required to raise
(or lower) a column of water against a vertical scale measured in localized units; e.g., 1 inch w.g. (25.4mm w.g.)
• 1 PSI = 27.7 inches w.g. (703.6 mm w.g.)• 1” Mercury (Hg) = 13.6 inches w.g.
Australasian Agent for
Percentage Tenacity Loss per Week in Water, Saturated Steam
or Moist AirFor Polyester Fabric
Australasian Agent for
Moisture Problem:Temp. Moist Air
ºC 10% RH 20%RH 40%RH 60%RH
0 0.0002 0.0004 0.0011 0.0026
20 0.0009 0.0018 0.0055 0.013
40 0.0045 0.009 0.027 0.063
60 0.022 0.045 0.13 0.3
80 0.1 0.2 0.62 1.4
100 0.5 1 3 7
120 2.5 5 15 34
140 12 24 70 165
Australasian Agent for
Moisture Problem:Temp. Water or saturated steam
ºC 80%RH 100%RH
0 0.0064 0.0075
20 0.031 0.036
40 0.15 0.18
60 0.72 .085
80 3.5 4.1
100 17 20
120 82 97
140 400 465
Australasian Agent for
Objectives:• To know about APC• To know what APC best suited an application• To know basic operation and maintenance of APC• To comply with government regulations• To eliminate environmental health hazards
Australasian Agent for
Performance Curve of a Filter Bag
Mass of Dust Deposited
Filte
r Dra
g
Initial dustcake
Effective filtration
Initiation of cleaning cycle
Resistance of clean fabric
Australasian Agent for
Pressure Drop ( P)Function of the pressure drop across both the filter and the deposited dust cake.
P across the clean fabric:
Pf = k1vf
Pf = pressure drop across the clean fabric, in.H2Ok1= fabric resistance, in H2O/(ft/min)
vf = filtration velocity, ft/min
Australasian Agent for
Pressure Drop ( P)P across the dust cake:
Pc = k2civf2t
Pc = pressure drop across the cake, in.H2Ok2= resistance of the cake, in H2O/(lb/ft2-ft/min)ci = dust concentration loading, lb/ft3
vf = filtration velocity, ft/mint = filtration time, min
Australasian Agent for
Pressure Drop ( P)
P across the dust collector:
Pt = Pf + Pc
Australasian Agent for
Cleaning Comparison:Parameter Pulse Jet Reverse Air Shaker type
Frequency Row of bags at a time
Clean one compartment at a time
Clean one compartment at a time
Motion Shock wave Gentle collapse of bags upon deflation
Simple harmonic or sinusoidal
Peak Acceleration
30-60g 1-2g 4-8g
Amplitude - - 1”-4”
Australasian Agent for
Cleaning Comparison:Parameter Pulse Jet Reverse Air Shaker type
Mode On stream/off stream
Off stream Off stream
Duration 100 msec; 15 seconds off time
Reverse air flow 20-40 seconds
10-100 cycles; 30 seconds to few minutes
Bag dimension
5”-6”; 8-20’L
8”-12”; 22’,30’,40’L
5”,8”,12”; 8’-10’,22’,30’L
Bag tension - 50-120 lbs, optimum varies
-
Australasian Agent for
Fabric Testing:
• Permeability- is defined in ASTM Standard D-737-69 as the volume of air that can flow through one square foot of cloth area at a pressure drop of no more than 0.5” w.g.
Australasian Agent for
Fabric Testing:
• MIT Flex Test- is used to measure the ability of fabrics to withstand self abrasion from flexing. This method is describe in ASTM Standard D-2176-69
Australasian Agent for
Fabric Testing:
• Mullen Burst Strength- describe in ASTM Standard D-231, is designed to show the relative total strength of fabrics to withstand pulsing or pressure.
Australasian Agent for
Fabric Testing:
• Tensile Strength- provides data on fabric stretch, elongation an tear. This is describe on ASTM Standard D-1682-64 for breaking load and elongation of fabrics.
Baghouse System Design
•TAPC
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Ductwork Sizing for Conveying Velocity
3500–4000 fpm
43 mph average
Australasian Agent for
1"
4"
1"
6"
1” + 4” + 1” + 6” = 12”
Australasian Agent for
Cubic Feet per minute (CFM)
Static Pressure
12”
6”
31.1 BHP
Australasian Agent for
Cubic Feet per minute (CFM)
Static Pressure
12”
6”
31.1 BHP = 40HP
Australasian Agent for
1"
4"6"
1"
1” + 4” + 1” + 6” = 12”
Close Damper
Australasian Agent for
AMPS on
Motor
Tools to Troubleshoot the Baghouse
Gauge
Australasian Agent for
Troubleshooting
4000 fpm 2800 fpm
Air Growth14°
Australasian Agent for
Start Cleaning @4–4.5” P
6”
AMPS on
Motor
Open Damper
0.5–1” Of P Change
Australasian Agent for
Cubic Feet per minute (CFM)
Static Pressure
12”
6”
31.1 BHP = 40HP
Australasian Agent for
Start Cleaning @4–4.5” P
6”
AMPS on
Motor
Open Damper
0.5–1”Of P Change
Temperature100–250F
Fabric/Cage Selectionfor Dust Collection
•TAPC
Australasian Agent for
Fabric Selection Considerations
– Baghouse operating temperature – Abrasion resistance needed– Resistance to cleaning energy– Gas stream chemistry– Air-to-Cloth ratio– Cleaning method
Australasian Agent for
500°F(259°C)
Fair
ExcellentGoodFair
GoodExcellentXXXXXXX
Oper. Vari. Polyester Acrylic Fiberglass* Aramid* PPS P84*
Max. Oper. TemperatureAbrasionFiltration PropertiesMoist HeatAlkalinesMineral AcidsOxygen(15%+)Relative Cost
275°F(134°C)
Excellent
ExcellentPoorFairFair
ExcellentX
264°F(130°C)Good
GoodExcellent
FairGood
ExcellentXX
500°F(259°C)
Fair
FairExcellent
FairPoor**
ExcellentXXX
400°F(204°C)
Excellent
ExcellentGoodGoodFair
ExcellentXXXX
375°F(190°C)GoodVeryGood
ExcellentExcellentExcellent
PoorXXXXXX
Fabric Characteristics & Suitability
Australasian Agent for
Finish:
Singe
Glaze
Silicone
AcrylicCoatings
PTFE PenetratingFinished
Expanded PTFE Membrane
Finish Purpose:
Recommended forimproved cake release
Provides short-termimprovements for cake release(may impede airflow)
Aids initial cake development and provides limited water repellancy
Improves filtration efficiency and cake release (may impede flow in certain applications)
Improved water and oil repellancy; limited cake release
For capture of fine particulate, Improved filtration efficiency, cake release
Available For:
Polyester, Polypropylene, Acrylic, Aramid, PPS and P84
Polyester, Polypropylene (felts)
Polyester (felt and woven)
Polyester and Acrylic felts
Aramid, Polyester
Aramid, Polyester, Acrylic,Polypropylene, P84, PPS,Fiberglass
Non-Fiberglass Finishes
Australasian Agent for
Finish Purpose:
Protects glass yarns from abrasion, adds lubricity
Shields glass yarn from acid attack
Provides enhanced abrasion resistance and limited chemical resistance
This unique formulation of polymers and PTFE provides superior resistance to bothacid and alkali attack as well as increasedabrasion resistance.
Finish:
Silicone, Graphite Teflon(SGT)
Acid Resistant
Teflon® B
Blue-Max CRF-70®
Fiberglass Finishes
Australasian Agent for
Filter Bag Failure: Mechanical
• Failure is caused by:– Aggressive cleaning– Abrasion (internal & external)– Faulty construction– High differential pressure– Normal wear– Fabric blinding
Australasian Agent for
Filter Bag Failure: Chemical
• Failure is caused by:
– Acid attack– Poor fiber or finish selection– O2 on PPS– Alkaline attack
Australasian Agent for
Filter Bag Failure: Thermal
• Failure is caused by:
– Fiber limitations• Strength loss• Shrinkage/elongation • Finish loss
– Hopper buildup
Protecting Bags forMaximum Collection Efficiencyand Longer Life
Australasian Agent for
Dustcake options
– Particulate Collecting– Artificial Precoat
Australasian Agent for
New fabric receives more airflow
– New fabric accepts airflows in the range of approximately 20 to 50 cfm.
– Filter bags that have been in service and have a good porous dustcake have airflows at 5 to 10 cfm.
– The new filters will be subjected to three times the airflows as the bags that are currently in service, causing potential damage early in the bag’s life.
Australasian Agent for
Unprotected new fabric interstices work like miniatureventuris to accelerate airflow through the fabric, causing particulate impingement.
Unprotected fabric
Australasian Agent for
How to protect new bags:
– Preheat equipment– Restrict airflows– Lockout cleaning cycle– Build good initial dustcake
Australasian Agent for
Initial dustcake requirements:
1. Porous, ensuring high airflowsA. Range of particle sizesB. Varying particle shape
2. Provide a uniform coat. (1/16” to 1/8”)3. Material should be neutral (pH). 4. Safe to handle.
Australasian Agent for
Protected
Unprotected
ArtificialDustcake
Embedded Particles inInterstices
New fabric protection & porosity
Australasian Agent for
Agglomerated dustcake restricts airflow.
Particulate bleedthrough can cause emissions.
Restricted airflow:
Australasian Agent for
By cleaning the bags thoroughly, and re-establishing a uniform, porous dustcake, we can level-off the damage and recover much of the airflow.
Proper artificial dustcake can help
Australasian Agent for
Bag protection options:
– Fly ash– Lime– Diatomaceous earth– BHA Neutralite®
Australasian Agent for
Lime
Fly Ash
5 ft2
10 ft2
15 ft2
20 ft2
1 lb. of Fly Ash covers 4 ft2 of cloth with a 1/16” coating
1 lb. of Lime covers 2-3 ft2 of cloth with a 1/16” coating
1 lb. of Neutralite covers 20 ft2 of cloth with a 1/16” coating
BHA Neutralite®
Precoat volume vs. weight comparison
Australasian Agent for
Neutralite®
Lime: Dolomite Quick Hydrated Crushed Stone
Fly Ash - Treated
10
503491
55
.052 lb/sq. ft.
.302 lb/sq. ft.
.177 lb/ sq. ft.
.474 lb/ sq. ft.
.286 lb/ sq. ft.
Amount used per ft2 for
1/16th” Coating
Density ( per ft3 )
Product
Precoat volume vs. weight comparison
Australasian Agent for
Additional reasons to pre-coat:
– Moisture can create agglomerated dustcake that destroys airflows; can create acid reaction, rust components
– Hydrocarbons create sticky dustcake difficult to clean; shorten bag life; high P
– Sparks burn holes in bags, can cause baghouse fires
– Neutralize gas stream chemicals
Australasian Agent for
Agglomeration of filter bags can be caused by gas stream moisture.
Moisture prevention
Australasian Agent for
Bag damage and failure can be caused by spark carryover.
Sparks ruin bags
Australasian Agent for
BHA Neutralite® injectionHigh on hopper wall 3” diameter x 6” long pipe nipple. Neutralite® can be injected here.
3” diameter x 6” long pipe nipple on inlet ductwork/elbow. Neutralite® can be injected here.
Discharge Hose
Vacutrans™
Compressed Air Connects Here
Poke hole port, usually 3” or 4” dia. Location is too low to inject Neutralite, not enough air volume to maintain velocity needed to carry Neutralite to top section of filter bags.
Vacuum Hose
Airlock or slide gate.
To ash removal system.
Hopper door lockout procedures usually won’t allow this access door to be open while dampers are open or fan is running.
Insulation and sheet metal lagging.
Hopper Side Wall
Australasian Agent for
Review
– Selection of material– Cleaning system off– Fan on (continuously)– Correct amount (1/16”-1/8”)– Maintain base cake
Visolite® Leak Detection System
Australasian Agent for
Purpose
– Identify holes in filters– Check for proper installation– Detect structural air leaks
Australasian Agent for
Key information
– Positive/Negative System– Process/Nuisance– Clean Air Plenum Access– Cloth Area– Injection Location
Australasian Agent for
Keys to successful test
– Shut off cleaning system– Fan in operation– Inject powder (1lb per 1000 sq ft of cloth)– Shut off Fan (45-60 seconds)– Test with light
Australasian Agent forPowder collects around air leaks
Visolite® Leak Detection System
Australasian Agent for
Options:• Visolite® colors:• • Monchromatic lights:
GREEN ORANGE PINK YELLOW
Australasian Agent for
Benefits review:
– Non-formaldehyde– Varying particle size– Labor savings
Australasian Agent for
Fabric SelectionStyle: PE72Fiber: 100% PolyesterWeight: 16 oz/yd2 (544 g/m2)Construction: Scrim supported felt; Duo-DensityCount: (N/A)Air Permeability: 15-35 CFM (.5-1 m3/min)Mullen Burst Strength: 375 psi (26 kg/cm2)Tensile Strength: 2 inch (5 cm) strip Warp: (N/A) Fill: (N/A)Thermal Stability 2% maximum at 275°F (135°C)Maximum Operating Temp: 275°F (135°C)Finish: Heat set, calendered, singed
Improving Dust Collection Performance with Pleated Filter Elements
•TAPC
Australasian Agent for
Common Problems: Pulse-Jet
• Fine Particle Emissions– Particulate bleedthrough of conventional felts– Aggressive design - high filtration velocities
• High Differential Pressure - Loss of Airflow– High air-to-cloth ratios– Poor cleaning mechanism efficiency– Extra drag across filter due to primary dustcake
Australasian Agent for
Common problems:• High differential pressure / loss of airflow - de rate:• High air to cloth ratios• Fine particulate• Poor cleaning mechanism efficiency
• Abrasion failure:• Bottom of filter bags located directly in line with inlet gas stream.• Excessive movement of filter causing bag to bag abrasion.
• Aggressive cleaning cycles:• Accelerated filter bag fatigue and flex failure.
• Difficult installation and removal:• Extra downtime to handle multiple and bulky components.
Multiple piece cages.• Filter bags can become “stuck” to cages and have to be cut off.•
Australasian Agent for
Increase surface filtration area…by as much as 2–3 times
Lower differential pressure... increased airflow
Lower emissions... double filtration efficiency
Solutions with pleated elements
Australasian Agent for
Benefits of pleated filter elements:
– Shorter filtersless abrasion failure
– Easy installationreduces downtime & lowers maintenance cost
– Lower pulse pressurecompressed air savingsreduction in pulse frequency,extending filter life
Australasian Agent for
Spunbond vs. felt
Face view - magnified 100x
Spunbondpolyester
Polyesterfelt
Australasian Agent for
Side view - magnified 50x
Spunbondpolyester
Polyesterfelt
Spunbond vs. felt
Australasian Agent for
*5:1 A/C Ratio (1.5:1), 0.5 micron particulate
inlet loading: 30 grains/acf (69 g/m3)
0
0.001
0.002
0.003
0.004
0.005
0.006
StandardPolyester
Felt0.006
(13.7 mg/m3)
SpunbondPolyester
0.0025(5.7 mg/m3)
Spunbondw/PTFE
Membrane0.0008
(2.3 mg/m3)
40% Reduction
Outlet emissions (grains/ACF*)
BHA PulsePleat®
Australasian Agent for
Lower differential pressure
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 5050mm
(2.0)
60mm
(2.4)
70mm
(2.8)
80mm
(3.2)
90mm
(3.5)
100mm
(3.9)
110mm
(4.3)
120mm
(4.7)
130mm
(5.1)
Diff
eren
tial P
ress
ure,
mm
w.g
. ( In
ches
w.g
. )
PE806/Membrane
Spun Bonded
Polyester Felt
Differential Pressure
Australasian Agent for
BEFORE
Pulse-Jet with conventional bags>100 bags>6.25 x120.00 bag size
(159mm x 3050mm)>1640 ft2 cloth area (152 m2 )>6.1 air-to-cloth ratio>10,000 ft3/min (283 m3/min)
>6- 8 w.g. average differential pressure (152-203mm w.g.)
Filtration area comparison
Australasian Agent for
AFTER
Pulse-Jet with BHA PulsePleat®
>100 elements>TA625 x 80.63 (2050mm)
PulsePleat®
>5800 ft2 cloth area (538 m2 ) >2.6 air-to-cloth ratio>15,000 ft3/min (425 m3/min)
>3-4 w.g. average differential pressure (76-101mm w.g.)
253% increase in filter area
50% increase
in airflow
Filtration area comparison
Australasian Agent for
• Increased airflow
• Lower DP
• Increased efficiency
• Extended filter life
• Reduced compressed air usage
134m3/hr167m3/hr
200m3/hr
Increased Surface Filtration Area provides:
Australasian Agent for
Top-load or bottom-load tops
Polypropylene or metal core
Polyurethane or metal bottom pan
Straps strategically placed for strength
Customized pleat depth and spacing
BHA PulsePleat® - for temps up to 265°F (130°C)
Australasian Agent for
Top-Load or Bottom-
Load Tops
Metal Core (Standard)
Metal bottom pan (standard)
Straps strategically placed for strength
Customized pleat depth and spacing
ThermoPleat - for temps up to 375°F (190°C)
ISO 9001
Australasian Agent for
Top-load or bottom-load tops
Metal core (standard)
Metal bottom pan (standard)
Straps strategically placed for strength
Customized pleat depth and spacing
BHA ThermoPleat® - for temps up to 450°F (232°C)
Pulse-Jet
•TAPC
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1/2”
5-6” Header
Pipe
Problem #1 - Limited cleaning ability
Australasian Agent for
1 1/2”
5-6” Header
Pipe
Recommended solution
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Cleaning sequence1 4 7 10 2 5 8 3 6 9
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Six ways dust gets to clean air plenum
– Hole in bag– Snapband– Welding– Clean too soon– Not cleaning– Air leaks at door seal
Australasian Agent for
Air Header
Seam Orientation: Facing Air Header or opposite the inlet
Seam
Australasian Agent for
Blowpipe manifold/bag seam alignment
Australasian Agent for
of cage
of blowpipe
Less than 1/4 inch(6.35 mm)
Blowpipe misalignment
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- When do we need to clean the
filter bags?
- When do we need to change the filter bags?
Australasian Agent for
Basic requirements in designing a Pulse-Jet design baghouse
- application
- air/gas volume requirement
- normal and maximum operating temperature
- dust to be collected
-moisture content on the gas stream
- inlet dust loading
- air to cloth ratio
- can velocity
Top-load Snapband Bag Installation
Australasian Agent for
Bag and cage selection
Standard recommended bag pinch Dependant upon fabric selection:
Bag
Cage
6mm- 19mm
Australasian Agent for
Beaded snapband filter bag design for flat tubesheet hole
– Eliminates multiple parts, minimizing labor expenses
– Provides a uniform double beaded gasket cuff assembly, assuring a leakproof seal
Australasian Agent for
Proper installation of the cuff• 1. Form the snapband into
the shape of a kidney.
The vertical seam in the cuff should be on the outer radius of the kidney shape. Seam
Top view
Australasian Agent for
• 2. Seat the seam of the cuff into the hole first with the tubesheet fitting between the beads, with one above & one below it.
Proper installation of the cuff
Seam
Top view
Australasian Agent for
Proper installation of the cuff• 3. Release the band and it will
spring securely into place. A sharp popping noise should be heard.
Check to make sure you cannot easily twist the snapband and that the band is securely seated with the metal tubesheet fitted into the center of the band groove.
Top view
Side view
Australasian Agent for
Improper Installation of Snap Band Cuff
• Snap Band Cuff installed upside down.
• Not sealing the PulsePleat properly
Australasian Agent for
Proper installation of the cuff
• Use caution, and ensure all fingers are out of the tubesheet opening when the snapband is released.
Australasian Agent for
Proper installation of the cage
Lower the cage straight down into bag. Do not drop the cage into the bag; lower it by hand to ensure the bag is not spiraled on the cage.
Pulse-Jet SystemTroubleshooting
Australasian Agent for
High differential pressure?
in w.c.
Australasian Agent for
System Troubleshooting - Step 1
NO
Yes
Isthere powerin and out of
the timer?
Turn on power and/or repair
timer.
Australasian Agent for
System Troubleshooting - Step 2
NO
Yes
Is the manifold
pressure at the proper setting?
Check for leaking solenoids and pulse values. Check compressed air source. Then check ∆P.
Australasian Agent for
System Troubleshooting - Step 3
NO
Yes
Do solenoids
and diaphragms
operate properly?
Repair and check ∆P.
Australasian Agent for
System Troubleshooting - Step 4
NO
Yes
Is pulse duration at
recommended settings?
Set at 100 milliseconds and
check ∆P.
Australasian Agent for
System Troubleshooting - Step 5
NO
Yes
Is the cleaning interval
at the lowest setting that will allow the air
manifold pressure to rebuild?
Change settings and check ∆P.
Australasian Agent for
System Troubleshooting - Step 6
NO
Is the differential
pressure reduced by cleaning
off-line?
Australasian Agent for
System Troubleshooting - Step 6
Pull a filter bag and run a permeability test to check for blinding.
Australasian Agent for
System Troubleshooting - Step 7
Yes
Is filter bag blinded?
Australasian Agent for
System Troubleshooting - Step 7
Analyze for cause of blinding and correct. Replace bags and follow good start-up procedure.
Australasian Agent for
System Troubleshooting - Step 8
Yes
Is the differential
pressure reduced by cleaning
off-line?
Australasian Agent for
System Troubleshooting - Step 9
NO
Yes
Is the air to cloth/ratio < 6:1 Pulse-Jet or
4:1 Plenum Pulse?
Consider pleated media conversion. If Plenum Pulse, consider conversion to Pulse-Jet or increasing collector size.
Australasian Agent for
System Troubleshooting - Step 10
NO
Yes
Is material being continuously
removed from hopper?
Remove material continuously and check ∆P.
Australasian Agent for
System Troubleshooting - Final Step
Call for
HELP!
Cleaning Systems: Long Bag Collector Technology
Australasian Agent for
Three Types of Cleaning Systems
– High Pressure/Low Volume• 8-7bar (80-100psi)
– Medium Pressure/High Volume• 2-3bar (30-45psi)
– Low Pressure/High Volume• 1bar (15psi)
Australasian Agent for
High Pressure/Low Volume
– 1.5" (typical) to 3" pulse valves– Typically round filters with cages– Utilizes venturis– Filters: 125-159mm x 3000-6000mm– Requires an air compressor
Australasian Agent for
Medium Pressure/High Volume
– 2.5" to 3" pulse valves– Typically round filters with cages– Do not use traditional venturis– Filters: 125-159mm x 3000-8000mm– Requires an air compressor
Australasian Agent for
Low Pressure/High Volume
– Round collectors with rotary arm cleaning system– Oval filters common also round with cages– No venturis– Filters: 125-159mm x 3000-6000mm
5"-6.25" x 10'-20'– Utilizes positive displacement blower
Australasian Agent for
High Pressure / Low Volume Pulsing
– Standard pulsing system – Typical 6" diameter compressed air header– 1 ½" diameter pulse valve & blowpipe– 1 ½" dia. pulse valve @ 90 psi uses 45 scfm max.
pulse interval: 6 sec. duration: 100ms/pulse volume: 4.5 scfm/pulse
– Horsepower required to compress air to 90 psi: 9.85 Hp = 7.35 Kwh
Australasian Agent for
Medium Pressure / High Volume Pulsing
– Standard pulsing system– 14" nominal diameter compressed air header– 2 ½" diameter pulse valve & blowpipe– Blowpipe requires nozzle extensions at each blow hole– 2 ½" diameter pulse valve @ 30 psi consumes 140 scfm
max. pulse interval: 6 seconds duration: 230ms volume: 14.03 scfm/pulse
– Horsepower required to compress air to 30 psi:15.26 Hp = 11.38 Kwh
– Formula:HP = 0.2267Q [[PSI/14.7+1] 0.283 –1] + 30% safety factor