The process
Zero liquid discharge plants concentrate effluent in MVR evaporators and dry the salt in a dryer. The MVR blower is the heart of the evaporator, the dryer needs a hot air fan, and the odour from the treatment tanks goes to a scrubber.
The gas
Saturated vapour, often with dissolved solids and a low pH. Wetted parts in stainless steel, a shaft seal rated for the vapour, drain points and a casing designed for condensate.
Fans in this process
| Duty | What it does here | Type usually selected |
|---|---|---|
| MVR Blower | Recompresses the vapour leaving an evaporator so it can be reused as the heating medium. | Backward curved |
| Fume Exhaust System | Hoods, ducting and an exhaust fan that capture fume at source and deliver it to a scrubber, bag filter or stack. | Backward inclined 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 |
| Ventilation Fan | Moves air through a plant or building for fresh air supply, heat removal and fume dilution where the system is ducted. | Backward inclined and forward curved |
| Hot Air Fan | Circulates or supplies air at elevated temperature to a dryer, oven or kiln. | Backward curved and backward inclined |
Air pollution control
Industries
Related processes
AFBC BoilersCFBC BoilersOil and Gas Fired BoilersBiomass Fired BoilersThermic Fluid HeatersRotary Lime KilnsWaste IncineratorsChemical Reactor and Tank VentsMVR EvaporatorsPharmaceutical Clean RoomsSolvent Recovery PlantsSulphuric Acid PlantsRefinery Fired HeatersFlare and Pressure Relief SystemsFluid Bed Dryers and CoolersBelt and Tray Dryers