The process
Milk powder, coffee and flavour spray dryers use filtered, heated supply air and an exhaust fan after cyclones and a bag filter. Hygienic construction, stainless steel, and a wheel that can be washed down.
The gas
Exhaust from a spray dryer carries fine product that is hygroscopic and sticks to any surface below dew point. A blade form that sheds deposit, insulation on the casing and easy access for cleaning.
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 |
| Hot Air Fan | Circulates or supplies air at elevated temperature to a dryer, oven or kiln. | Backward curved and backward inclined |
| Combustion Air Blower | Feeds a burner with air at the pressure the burner register needs. | Backward curved and radial tipped |
| 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 |
| AHU | A packaged unit with fan, filters, cooling or heating coil and mixing box that conditions and delivers supply air. | Backward curved and forward curved |
Air pollution control
Industries
Related processes
Rice Husk Fired BoilersOil and Gas Fired BoilersBiomass Fired BoilersThermic Fluid HeatersHot Air GeneratorsGypsum Calcining PlantsCeramic Body Spray DryersMVR EvaporatorsRotary DryersFluid Bed Dryers and CoolersBelt and Tray DryersFood Ovens and FryersFlour and Grain MillsFactory Shed VentilationPneumatic Conveying SystemsSilo Aeration and Fluidisation