Air pollution control devices aim to reduce harmful pollutants. Particulate matter can be controlled using settling chambers, cyclones, baghouses, and wet scrubbers. Gaseous pollutants are controlled using absorption, adsorption, or combustion. Various technologies exist to filter pollutants from air at their source or during processing to improve air quality and protect human and environmental health.

1. AIR POLLUTION
AND DEVICESS TO
CONTROL
PRESENTED BY:- ABHIJIT GANTAYAT
REDG NO:- 210705100033
SCHOOL OF APPLIED SCIENCES
CENTURION UNIVERSITY OF TECHNOLOGY AND
MANAGEMENT,BBSR

2. CONTENTS
1. Introduction
Environmental Pollution
2. Air Pollution
Major air pollutants
Source of air pollution
Effect of air Pollution
3. Air pollution control
Source control
Controlling process and technology
Particulate matter pollutants
Gaseous pollutants
4. Conclusion

3. INTRODUCTION
• The earth is the only planet know in the universe capable of
supporting life.
• The life supposing properties are the atmosphere and
hydrosphere.
• Environment pollution and efforts for the betterment of living
standards are the two sides of the same coin.
• In the wake you up industrialization consequent and ever
increasing population,the basic amenities of life namely air,water
and land are being polluted continuosly.

4. AIR POLLUTION
• Atmosphere is a thin layer gas which surrounds the earth.
• Three major layer:Troposphere, Stratosphere,Mesosphere.
• 99%the volume of claen air is in troposphere, which extent
17km above MSL.
• Nitrogen (78%)and oxygen (21%)and 1%argon ,CO2 and
water vapour.
• As per the definiton of World Health Organization(WHO): Air
pollution is a “situation in which the outdoor atmosphere
contains material in concentration which are harmful to

5. MAJOR AIR POLLUTANTS:-
• (CO)X
• (SO)x
• (NO)x
• Volatile organic compounds (VOCs)
• Suspended particulate matter
• Photo chemical oxidantas
• Radio active substance
• Heat

6. SOURCES OF AIR POLLUTION
• 1. Natural sources
• Example :- Volcanic eruption release
poisonous gases.
• 2. Man-made sources
• Example:- Deforestation, burning of
fossil fuels, emissions from vehicle,smoke
from industry.

7. AIR POLLUTION CONTROL
• 1. Control at source
• 2. Controlling devices and technology
• Particulate pollution control
• Gaseous Pollution control
•Control at Source
• Source relocation
• Source shut down
• Fuel or energy substitution
• Process changes
• Good operating practice
• Vehicular emission control

8. PARTICULATE MATTER POLLUTANT
• Particulate matter is the sum of all solid and liquid particles suspended in
air,many of which are hazardous.
• Temperature and chemical composition of gases to be cleaned from
particulants before selection of proper control device.
• Information on the Physical form of suspended materials,its size,shape,
chemical composition and electrical sensitivity is required for this selection
• A. Settling chamber
• B. Inertial separation or cyclone
• C. Bag houses and filters
• D. Wet Scrubbers

9. SETTLING CHAMBER
• A simplest device collecting dust of size >10um.
• Settling Chamber use the force of gravity reduced.solid
particles
• The gas stream enters a chamber where the velocity of
the gas is reduced. Larger particle drop out the gas and
recollected in hoppers.

10. INERTIAL SEPARATOR OR CYCLONE
• This process is achieved by a sudden change in the
direction of gas flow.
• The dust particle is spinning in a circular path,it is
subjected to an outward force,as a result the
particles collect on the wall and fall to the bottom of
the vessel.

11. WET SCURUBBERS
• Object of scrubber is the entrain particulate matter in liquid
droplets.water subsequently flows from the bottom of the
scurubbers,the particulates is allowed to settle and clarified water
is circulated.
•Gaseous pollutants
• The removal method for gaseous pollutants are designed to
concentrate the pollutants in a liquid (absorption)or a
(adsorption).
• Sometimes direct conversion of Gaseous pollutants is possible by
combustion.

12. ABSORPTION
• This process is selected to remove gaseous pollutants by
dissolution in to a liquid solvent such as water or in a caustic or
acid solution.
• As the gas stream paases through the liquid the liquid absorb the
gas.
• Absorption is commly used to recover products or to purify gas
stream that have high concentration of organic compounds.
ADSORPTION
. Adsorption is a process where gases, vapour or liquid
are concentrated on a solid surface as a result of surface
or chemical force.

13. COMBUSTION
• This method for the removal of VOCs since they can be decompose to
CO2 andH20.
• The direct and indirect or catalytic methods are used.
• The catalytic method is preferred when low temperature of the process
is desired.
• Common catalysts are Cu,Ni,V and Zn compounds.

14. CONCLUSION
• Air pollution is a major environmental issue.It can affect the
health and light support system as well.
• Since clear air is an essential factor of life for respiration, it is
necessary to prevent the source of air pollution.
• Using appropriate controlling devices and process,the pollutants
in the air can be removed.