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AIR POLLUTION

CONTROL EQUIPMENT

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Air Pollution Legislation (RA 8749) Clean Air

Act• Set emission and ambient air quality limits.

AR !"AL#$ C%R%L

Air Pollutant 'mission and Control)Control 'missions

)"nderstand *rocess (trans*ort+trans,ormation and remo-al)

)/onitor concentration

4)Protection ,rom e0ects

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C%R%L %1 PAR#C"LA#'S

) Settling c2ambers 3 consist o, ide *lacesin t2e e52aust 6ue 2ere large *articlescan settle out+ usually it2 bae to slot2e emission stream. %nly *articulates

:m can be remo-ed.

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) Cyclones 3 most e0ecti-e means o,controlling *articulates. #2e dirty air isblasted into a conical cylinder but o0

center line. #2is creates a -iolent sirlit2in t2e cone and t2e 2ea-y solidsmigrate to t2e all o, t2e cylinder 2eret2ey slo don due to ,riction+ slide don

t2e cone and ;nally e5it at t2e bottom. #2e clean air is in t2e middle o, t2ecylinder and e5its out at t2e to*.

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Cyclone Separator - Cheap

Dirty gas

Dust discharge

Cleaned gas

Does NOT produce

hazardous

materials like other

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) es o, *articulatesbut are sensiti-e to 2ig2 tem*erature and2umidity. 1ilter bags are idely used in manyindustrial a**lications. #2e dust *articles ad2ereto t2e ,abric due to entra*ment and sur,ace,orces.

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Cleaned gas

Dirty gas

Baghouse Filter – only one to remove hazardous fine particles

Dust discharge

Bags

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4) S*ray #oer or scrubber 3 e0ecti-e

,or remo-ing large *articulates.?rabac=s include *roducing -isible*lume+ albeit only ater -a*or. #2easte is con-erted to liquid 2ic2

needs treatment.

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Sieve Tray

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Perforated Tray

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Valve and Valve Tray

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@a*orLiquid 1lo Pat2s 

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 #RA$ ?'SB&S S'@' #RA$

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I) 'lectrostatic Preci*itators ('SP) 3 idely usedin *oer *lants+ because *oer is readily

a-ailable. #2e *articulates are ;rst c2arged byelectrons Gum*ing ,rom one 2ig2 3 -oltageelectrode to t2e ot2er and t2en migrating tot2e *ositi-ely c2arge collecting electrode.'0ecti-e in remo-ing submicron *articles.

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C%R%L %1 BAS'%"S P%LL"#AS) Jet Scrubbers 3 t2e gaseous *ollutants are

dissol-ed in ater. Alternati-ely+ a c2emicalmay be inGected 2ic2 reacts it2 t2e*ollutants (usually done to remo-e S%  andS%)

Di t

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Dirty gas

Dirty water 

Clean

water 

Wetgas

Cleaned gas

emo!e "#$ o% SO& and

'( %rom emissions

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) Adsor*tion 3 used 2en it is *ossibleto bring t2e *ollutant into contact it2an adsorber li=e acti-ated carbon.

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) ncineration or 1laring 3 used 2enorganic *ollutant can be o5idi>ed to

C% and ater+ catalytic combustion.

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C%R%L %1 S%5

)C2ange to lo sul,ur ,uel (coal tonatural gas+ more e5*ensi-e)

)?esul,uri>e t2e coal

)#all stac=s to dis*erse S%)

4)1lue gas desul,uri>ation 3 reduce S%) emitted by cleaning t2e gases

coming ,rom t2e combustion *rocess

S l ti

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Solutions

Motor Vehicle Pollutions

Prevention Cleanup

Mass transit

Bicycles and walking

ess polluting engines

ess polluting fuels

!mprove fuel efficiency

"et older# polluting

cars off the road

"ive $uyers ta% write-

offs for $uying low-

polluting# energy-

efficient vehicles

&estrict driving in

polluted areas

'mission controldevices

Car e%haust

!nspections

twice a year 

Stricter emission

standards

Solutions

,or mobileemissions

Solutions

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Solutions

(ir Pollution

Prevention Cleanup

!mprove energy efficiencyto reduce fossil fuel use

&ely more on lower-polluting natural gas

&ely more on renewa$leenergy )especially solarcells# wind# and solar-produced hydrogen*

+ransfer technologies forlatest energy efficiency#renewa$le energy# andpollution prevention todeveloping countries,

&educe poverty

istri$ute cheap and efficient

cookstoves to poor families in

developing countries

&educe or $an indoor smoking

evelop simple and cheap

test for indoor pollutants

such as particulates# radon#

and formaldehyde