Presentation on theme: "Why Recover Petrol Vapour in Petrol Filling Stations?"— Presentation transcript:
1 Why Recover Petrol Vapour in Petrol Filling Stations? Petrol contains volatile organic compounds (VOCs) that evaporate in fuel tanksDuring unloading petrol to underground storage tank and refueling vehicle, petrol vapour is released to atmosphereVOCs from petrol vapour will enhance the formation of ozone and fine particulates in the atmosphere, thus causing smogVOCs from petrol vapour contains benzene (a carcinogen), thus presenting a potential health risk to the publicSmell of VOCs can be a nuisance to people nearby
2 Vapour Recovery in Petrol Filling Stations In 1999, the Air Pollution Control (Petrol Filling Stations)(Vapour Recovery) Regulation was introducedPetrol filling stations were required to install a system to recover petrol vapour emitted during unloading of petrol into the underground storage tank (Phase I vapour recovery system)All stations now have Phase I vapour recovery system
3 Vapour Recovery During Unloading of Petrol (Phase I) Petrol Filling StationPetrol Tankervapour petrolliquid petrolUnderground Storage TankPhase I(Unloading)
4 Vapour Recovery in Petrol Filling Stations The Air Pollution Control (Petrol Filling Stations) (Vapour Recovery) Regulation was amended in to require petrol filling stations to install a system to recover petrol vapour emitted during vehicle refuelling (Phase II vapour recovery system)The amended Regulation has become effective on 31 March 2005
5 Vapour Recovery System for Petrol Refuelling (Phase II) P/V VentValvePetrol DispenserVehicleFuel TankVapour ReturnedPetrol VapourVacuumPumpLiquid PetrolPetrol Liquid pumpLiquid PetrolUndergroundPetrol Storage Tank
6 Vapour Recovery at Petrol Filling Station Underground Storage Tank Petrol TankerDispenserVehicleVapourLiquidUnderground Storage TankPhase I(Unloading)Phase II(Refuelling)
7 Installation Progress of Phase II Vapour Recovery System All new stations have already installed Phase II vapour recovery system immediately after the Regulation has become effective fromExisting stations have 3-years to retrofit such system (starting from ). By end of 2006, almost half of the stations will complete the retrofit.
8 Certificate at Stations will Phase II Vapour Recovery System If a station has installed a Phase II vapour recovery system which passes the required tests, it will have this certificate posted at the station.
9 Stations with Phase II Vapour Recovery System have different Nozzles Special features of Phase II Vapour Recovery nozzle:Holes to suck petrol vapour back to underground storage tankVapour guard to prevent vapour release