The process
Hazardous, medical and municipal waste incinerators hold the furnace under draft with an ID fan that sits after the quench, scrubber, bag filter and carbon injection. The gas at the fan is wet and acidic. Combustion air and secondary air blowers serve the primary and secondary chambers.
The gas
Flue gas after the quench and scrubber is wet, acidic and still carries fine dust. The fan is in stainless steel or lined construction, with a shaft seal and drains, sized at the saturated density.
Fans in this process
| Duty | What it does here | Type usually selected |
|---|---|---|
| ID Fan | Sits at the outlet of a boiler, kiln or furnace and draws the flue gas through the plant to the stack. | Backward curved, backward inclined and radial tipped |
| Combustion Air Blower | Feeds a burner with air at the pressure the burner register needs. | Backward curved and radial tipped |
| Dilution Air Blower | Injects ambient air into a hot flue gas stream to bring it down to a temperature the downstream bag filter or fan can accept.. | Backward curved |
| Dust Collector Fan | The fan behind a bag filter, cyclone or multiclone on a dust extraction system. | Backward inclined and radial tipped |
| Bag Filter Fan | Pulls the process gas through the filter bags and discharges the cleaned gas to the stack. | Backward curved and radial tipped |
| Mist Eliminator | Separates entrained liquid droplets from a vapour or gas stream, ahead of a compressor, a fan or a stack.. | Demister Knockdown Vessel |
Air pollution control
Industries
Related processes
AFBC BoilersCFBC BoilersOil and Gas Fired BoilersThermic Fluid HeatersRotary Lime KilnsBiomedical Waste IncineratorsCrematoriaChemical Reactor and Tank VentsMVR EvaporatorsEffluent Treatment and Zero Liquid Discharge PlantsPharmaceutical Clean RoomsSolvent Recovery PlantsSulphuric Acid PlantsRefinery Fired HeatersFlare and Pressure Relief SystemsFluid Bed Dryers and Coolers