pulsejet fabric filters

8/7/2019 Pulsejet fabric filters

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Proven technology, expert project execution andextensive experience in the control of particulate,

opacity and gaseous emissions.

PULSE JET FABRIC FILTERS


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Today, B&W combines our provenbaghouse technology with ourextensive project executionexperience to provide cost-effectivecontrol of particulate emissionsand opacity. Integrating fabricfi lters with our sorbent injectionand fl ue gas desulfurization (FGD)technologies also provides highremoval effi ciencies of hazardous airpollutants in a variety of applications.

As a technology innovator andleader, B&W has provided someof the largest pulse jet fabricfi lters in the world. This includes asingle-casing pulse jet fabric fi lterinstalled on an 800 MW unit. B&Whas also successfully converted

B&W offers various styles for maximum design fl exibilitto address site-specifi c arrangement requirements

an electrostatic precipitator into asingle casing pulse jet fabric fi lteron a 600 MW coal-fi red boiler.

B&W conducts extensive researchin laboratory and pilot facilities,as well as at our existing full-scalefi eld installations. We are constantlyevaluating performance of individualcomponents such as pulse valvesand bag fabrics to fi nd moreeffective ways to reduce power plant

emissions and enhance operation.By applying advanced technologies,such as our pulse jet fabric fi lter,we continue to maintain coal as acompetitive, clean and viable fuelchoice for steam generation.

THE BABCOCK & WILCOX COMPANYS (B&W) EXPERIENCE IN CONTROLLINGPOWER PLANT EMISSIONS IS UNMATCHED IN THE INDUSTRY. B&Ws PARTICULATE

CONTROL EXPERIENCE BEGAN WITH ONE OF THE FIRST COMMERCIAL/

INDUSTRIAL ELECTROSTATIC PRECIPITATORS (ESP) IN THE UNITED STATES (U.S.),

INSTALLED IN 1907. WE ALSO PARTICIPATED IN THE FIRST U.S. UTILITY FABRIC FILTER

INSTALLATION IN THE 1960s. AS THE OWNER AND OPERATOR OF A COAL-FIRED

COGENERATION FACILITY WITH A PULSE JET FABRIC FILTER FOR MORE THAN 20

YEARS, B&W HAS A UNIQUE PERSPECTIVE WHICH INCORPORATES OPERATING

EXPERIENCE INTO OUR DESIGN.

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B&W successfullyconverted oneof the two 300MW electrostaticprecipitators on a 600MW coal-fi red boiler

into a single-casingpulse jet fabric fi lterserving the entireboiler.


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Advanced technology and experienceprovide numerous benefits

Pulse jet fabric fi lters are replacingESPs and reverse gas fabric fi ltersas the workhorse for particulatecollection for solid fuel fi red power

plants and industrial boilers inalmost all new installations. Thistechnology provides enhancedparticulate emissions control over awide range of operating conditions.Performance is relatively insensitiveto changes in fuel and minor upsetsin boiler or upstream emissioncontrol equipment operation.

B&Ws leadership in fabric fi ltertechnology development is

maintained through on-goingresearch and development. Throughlicensing arrangements we can alsoprovide complementary technologiessuch as the Electric Power ResearchInstitutes (EPRI) COHPACand TOXECON technologies.

B&W constantly evaluates performanceof individual components such as pulsevalves and bag fabrics to fi nd moreeffective ways to reduce power plantemissions and enhance operation.

Our considerable installation baseis supplemented with vast processknowledge in both solid fuelcombustion and emissions control.

Product advancements continuethrough cooperative R&D effortswith existing plant operators aswe integrate operating experiencesinto our equipment design. B&Wsexperience in pulse jet fabricfi lter erection and fi lter baginstallation also provides feedbackon design elements critical toassuring successful applicationof the technology.

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Pulse jet technology provides ownerswith flexible operation and control

In a pulse jet fabric fi lter, a wirecage in each bag keeps it fromcollapsing during normal fi ltration.As the fl ue gas passes from theoutside of the bag through thefabric, the particulate forms a cakeon the surface of the bag. Cleaningthe fi lter bags is accomplished byintroducing controlled pulses ofcompressed air into each fi lter bagthrough a blowpipe and orifi ce

assembly mounted just above thefi lter bag. These short-durationpulses of air exit the blowpipeorifi ces and travel down the fi lterbags. The accumulated dust cakeis dislodged by the resulting shockwave and falls into the hoppers.

The dust is conveyed from thehoppers away from the fabric fi lterby an ash transport system forbenefi cial re-use or disposal.

Operation and control of the fabricfi lter impacts overall plant availabilityand maintenance costs as well asemissions. B&Ws fabric fi lter controlsystem provides plant operatorswith the fl exibility to select the

best combination of operatingmodes and cleaning logic tomaximize availability and minimizemaintenance costs. Various cleaningmodes include on-line, off-lineand manual.

Tubesheet

NormalOperation

PulseCleaning

WireCage

CleaningAir

Pulse

Pulse jettechnology

provides ownerswith fl exible

operation andcontrol tomaximize

availabilityand minimizemaintenance

costs.

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Feature Benefi ts

reduces potential bag-to-bag abrasion

- Roof hatch w/optional arrangement requirements

weather enclosure- Walk-in plenum- Enhanced walk-in plenum

B&Ws PULSE JET FABRIC FILTERS FEATURE DESIGN INNOVATIONS

THAT PROVIDE BENEFITS NOT AVAILABLE FROM OTHER SUPPLIERS

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Our experience in pulse jet fabricfi lter design, erection and fi lter baginstallation enables B&W to selectthe appropriate bag fabric foroptimum cleaning performance.

Optimum cleaning performance

B&Ws experience gives us theknowledge to select theoptimum bag fabric for eachspecifi c application.

Normal operation requires fewadjustments. However, after initialstartup and once the bags becomeseasoned, some adjustment tothe cleaning procedure may berequired to optimize the fabric

fi lter operation for a specifi capplication and gas fl ow.

Adjustable settings (stop, start,

pressure, duration and recoveryperiod) give the operator morefl exibility. The cleaning system isdesigned to clean the fi lter bagsas thoroughly as possible whileoptimizing system performancewithout damaging the bags.

B&Ws pulse system designoffers benefi ts such as

improved cleaning effi ciency,reduced pressure loss, reduced

compressed air use, lowerpower consumption, and

increased bag life.

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Working with oursubsidiary, Babcock &Wilcox ConstructionCo., Inc., B&W engineersdesign for constructabilityto minimize on-site laborrequirements, increasesafety, and reduce

construction costs.

Integrated project execution fora variety of applications

Project management andconstruction

Successful project execution isequally important as choosing the

right technology and equipment.B&Ws experienced environmentalproject managers are experts inutilizing modern project controlmethodologies and working withina team organizational structure toachieve the safe, successful andtimely completion of your project.

B&W project teams provide valuethrough the use of the followingmanagement, scheduling andproject control tools:

Advanced 3D modeling Knowledge-based design

engineering tools World sourcing and supply

management Earned value scheduling

and cost control Web-based project communications Electronic data transfer

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Co-located at B&Ws headquarters,specialized construction servicesare available through its subsidiary,Babcock & Wilcox ConstructionCo., Inc. (BWCC). Working closelywith BWCC, B&W engineers designfor constructability an advancedconstruction concept that minimizeson-site labor requirements, increases

safety, reduces construction costsand lead time, and achieves productdesign features which are properlyapplied for optimal performance.

Solutions for a variety ofapplications

B&Ws pulse jet fabric fi lters provideemissions reduction solutions for avariety of applications:

Stand-Alone Fabric Filters Coal-fi red utility power plants Solid fuel industrial boilers (stokers) Municipal solid waste incinerators Fluidized-bed boilers fi ring

opportunity fuels such as waste coal

Multi-Pollutant IntegratedEmissions Control Downstream of a spray dryer

absorber (SDA) for acid gasemissions control

Sorbent injectionactivated carbon for mercuryemissions controlalkali injection for sulfur trioxide

(SO3) controlPlant Upgrades Pulse jet fabric fi lter retrofi ts ESP to pulse jet fabric fi lter

conversions

B&Ws pulse jet fabricfi lter may be used as a key

component in a multi-pollutant control strategywhen coupled with a sorbentinjection system.


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With the current emphasis onemissions reduction, fabric fi ltersare increasingly being used as akey component in a plants multi-pollutant control strategy. Thisstrategy includes both thetraditional collection of ash orparticulates, as well as hazardous

air pollutants.

For example, a fabric fi lter maybe coupled with sorbent injectionsystems for collection of bothgaseous and solid pollutants.Sorbent introduced upstream ofthe fabric fi lter is deposited overthe entire surface of the fi lterbags. Flue gas fl owing throughthe sorbent-coated fi lter bagsprovides intimate pollutant-to-

sorbent contact, thereby enhancingthe ability to adsorb hazardousair pollutants such as mercury andcondensables such as SO3.

Examples of sorbents used withfabric fi lters include powderedactivated carbon for mercurycontrol and trona or lime forcontrol of SO3. Trona or limemay also be the economicchoice for sulfur dioxide (SO2)control on certain applications.

Fabric fi lters are an integral partof B&Ws dry scrubber fl ue gasdesulfurization systems and continueto be part of our multi-pollutantcontrol strategy.

Fabric fi lters for

multi-pollutantcontrol

B&Ws support for your projectdoesnt end when installation ofyour equipment is completed.We provide a total package ofaftermarket services, including:

Equipment enhancements withperformance guarantees

Startup and commissioning Performance testing and

monitoring Equipment tuning and

optimization Field service engineering Replacement parts

B&W fi eld service engineers, locatedin regional offi ces throughout NorthAmerica, are available to provideexpert and timely on-site technicalsupport.

Your regional B&W offi ce should beyour fi rst contact when looking toimplement new equipment or plantmodifi cations and improvements.

Our fabric fi lter technology isalso available worldwidethrough various licensees.

Qualityaftermarket

services

A pulse jet fabric fi lter is an integralcomponent in B&Ws dry fl ue gasdesulfurization system, providing

enhanced secondary SO2removal.11


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Babcock & Wilcox Power Generaon Group, Inc.

20 S. Van Buren AvenueBarberton, Ohio 44203 USA

Phone: 330.753.4511

Fax: 330.860.1886

The informaon contained herein is provided for general

informaon purposes only and is not intended nor to be

construed as a warranty, an offer, or any representaon

of contractual or other legal responsibility.

COHPACand TOXECON are trademarks of

Electric Power Research Instute, Inc.

2007 Babcock & Wilcox Power Generation Group, Inc.

All rights reserved.

E101-3199 2KA0G

Babcock & Wilcox Power Generaon Group, Inc. is a

subsidiary of The Babcock & Wilcox Company (B&W).

Established in 1867, B&W is a world leader in providing

steam generang and emissions control equipment,

nuclear operaons and components, and defense

program management services.

For more informaon, or a complete lisng of our sales

and service offices, call 1-800-BABCOCK (222-2625),

send an e-mail to [email protected], or access

our Web site.

www.babcock.com

To find out more about

our pulse jet fabric filters, contact

your regional B&W office, orone of our environmental experts by

calling 1-800-BABCOCK

(1-800-222-2625).

pulsejet fabric filters

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