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Air pollutin control 1

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  • 1. AIRAIR POLLUTIONPOLLUTION CONTROLCONTROL
  • 2. NATURAL ATMOSPHERICNATURAL ATMOSPHERIC CLEANING PROCESSCLEANING PROCESS DISPERSION –DISPERSION – REDUCES THEREDUCES THE CONCENTRATION OF POLLUTANTS IN ANYCONCENTRATION OF POLLUTANTS IN ANY ONE PLACE.ONE PLACE. GRAVITATIONAL SETTELINGGRAVITATIONAL SETTELING FLOCCULATION AND AGGLOMERATIONFLOCCULATION AND AGGLOMERATION ABSORPTIONABSORPTION ADSORPTIONADSORPTION PHOTOSYNTHESISPHOTOSYNTHESIS
  • 3. AIR POLLUTION CONTROLAIR POLLUTION CONTROL STRATEGIESSTRATEGIES AIR QUALITY MANAGEMENTAIR QUALITY MANAGEMENT STRATEGYSTRATEGY EMISSION CONTROL STRATEGYEMISSION CONTROL STRATEGY FINANCIAL INCENTIVE STRATEGYFINANCIAL INCENTIVE STRATEGY COST BENEFIT STRATEGYCOST BENEFIT STRATEGY
  • 4. ENGINEERING CONTROLENGINEERING CONTROL CONCEPTSCONCEPTS CHANGE OR MODIFY THE DESIGN OFCHANGE OR MODIFY THE DESIGN OF THE WHOLE OR PART OF THE PROCESSTHE WHOLE OR PART OF THE PROCESS CHANGE OR MODIFY THE OPERATINGCHANGE OR MODIFY THE OPERATING CONDITION OF THE PROCESSCONDITION OF THE PROCESS CHANGE OF RAW MATERIALCHANGE OF RAW MATERIAL AND FUELAND FUEL INSTALL APPROPRIATE POLLUTIONINSTALL APPROPRIATE POLLUTION REMOVAL DEVICES OR SYATEMREMOVAL DEVICES OR SYATEM
  • 5. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM POLLUTANTS CONTROL DEVICES/SYSTEM PARTICULATE MATTERS •GRAVITY SETTLER •CYCLONE SEPARATOR •ELECTROSTATIC SEPERATOR •SURFACE FILTER •DEPTH FILTERS •SCRUBBER
  • 6. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM A. GRAVITY SETTLER - A LONG CHAMBER THROUGH WHICH CONTAMINATED GAS PASSES SLOWLY AND THE PARTICLES ARE SETTLED AT THE BOTTOM BY GRAVITY
  • 7. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM B. CYCLONE SEPARATOR - THE GAS ENTER SIPRALS AROUND THE OUTER PART OF CYLINDRICAL BODY - IN THE SPIRAL , SOLID PARTICLES ARE DRIVEN TO THE WALL AND ATTACH TO EACH OTHER, FORMING AGGLOMERATES. - THE LARGER AGGLOMERATE SLIDES DOWN AND IS COLLECTED.
  • 8. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM C . ELECTROSTATIC SEPARATOR - FOR PARTICLES BELOW 5 MICROMETER - PARTICLES GET CHARGED AND ATTRACTED TO THE WALL ELECTROSTATICALLY - THE PARTICLES AGGLOMERATE AND IA COLLECTED.
  • 9. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM D . SURFACE FILTERS - CAN BE A PIECE OF CLOTH, WIRE MESH OR FILTER PAPER WITH HOLES SMALLER THAN THE DIMENSION OF PARTICLES TO BE RETAINED - THE PARTICLES COLLECT IN THE FORM OF DUST ON THE SURFACE - FOR INDUSTRIAL, THE GAS FILTER IS GENERALLY CALL BAG HOUSE.
  • 10. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM E . DEPTH FILTER - THE MECHANISM OR OPERATION IS LIKE A CIGARETTE FILTER F . SCRUBBER - THE DIRTY GAS IS WETTED WITH A WETTING LIQUID AND THE PARTICLES BECOME HEAVY AND CAN BE REMOVED.
  • 11. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM POLLUTANTS CONTROL DEVICES/SYSTEM SULPHUR OXIDES • GAS ABSORPTION AND STRIPPING •SODA SCRUBBING •OTHER ALTERNATIVES
  • 12. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM POLLUTANTS CONTROL DEVICES/SYSTEM NITROGEN OXIDES • LOW NOX COMBUSTION TECHNOLOGY •DENITRIFICATION TECHNOLOGY ACID GASES • WET SCRUBBING
  • 13. CONTROL DEVICES & SYSTEMCONTROL DEVICES & SYSTEM POLLUTANTS CONTROL DEVICES/SYSTEM TOXIC GASES • THERMAL COMBUSTION • CATALYST AND SELECT REAGENTS. • ADSORPTION •ABSORPTION ODOUR • MODIFICATION OF PROCESS •ADSORPTION •COMBUSTION •ODOUR MASKING •INJECTING SUBSTANCES
  • 14. MOBILE SOURCE CONTROLMOBILE SOURCE CONTROL - CAN BE CONTROLLED THROUGH VARIOUS METHOD. - THE MAIN METHOD USED CATALYTIC CONVERTERS. - REDUCE POLLUTION FROM MOBILE SOURCE ARE BY a. DESIGNING ENVIRONMENTAL b. FRIENDLY VEHICLES c. USING LESS POLLUTING FUEL SUCH LPG AND FUEL TECHNOLOGY
  • 15. MONITORING AIR POLLUTIONMONITORING AIR POLLUTION OBJECTIVE a.TO ENSURE COMPLIANCE WITH ENVIROMENTAL REGULATIONS b.AS A MANAGEMENT TOOL FOR POLLUTION STRATEGY c.FOR RESEARCH AND DEVELOPMENT
  • 16. MONITORING AIR POLLUTIONMONITORING AIR POLLUTION AMBIENT AIR SAMPLING a.TYPES OF SAMPLING a. EXTRACTIVE METHOD b. IN-SITU MONITORING c. REMOTE SENSING
  • 17. MONITORING AIR POLLUTIONMONITORING AIR POLLUTION AMBIENT AIR SAMPLING b. AMBIENT MONITORING OF PARTICULATE MATTER - AIRBORNE PARTICULES ARE COMMONLY COLLECTED USING A 20 CM BY 25CM RECTANGULAR SHEET OF GLASS FIBER FILTER MEDIA HELD ONTO A SUPPORT SCREEN AND CONNECTED TO A HIGH VOLUME VACCUM PUMP FOR DRAWING SAMPLES - FOR PARTICLES BELOW 10 MICROMETER, THE PM 10 SAMPLER IS USED TO COLLECT FINE PARTICLES.
  • 18. MONITORING AIR POLLUTIONMONITORING AIR POLLUTION AMBIENT AIR SAMPLING b. AMBIENT MONITORING OF GASEOU POLLUTANTS - ABSORPTION TRAIN - IMPREGNATED FILTERS - DIFFUSION TUBES - SOLID ADSORBENT TUBE - GRAB SAMPLING
  • 19. REGULATION RELATED AIRREGULATION RELATED AIR POLLUTIONPOLLUTION ENVIROMENTAL REGULATION IN MALAYSIA a. ENVIROMENTAL QUALITY CLEAN AIR REGULATION 1978 b. ENVIROMENTAL QUALITY ( CONTROL OF LEAD CONCENTRATION IN MOTOR GASOLINE REGULATION 1985 c. ENVIROMENTAL QUALITY (MOTOR VEHICLE NOISE ) REGULATION 1987
  • 20. REGULATION RELATED AIRREGULATION RELATED AIR POLLUTIONPOLLUTION ENVIROMENTAL REGULATION IN MALAYSIA E. ENVIROMENTAL QUALITY (PROHIBITION ON THE USE OF CHLOROFLUOROCARBONS & OTHER GASES AS PROPELANTS & BLOWING AGENTS ) ORDER 1993