The process
Granulators, dryers and coolers in NPK, DAP and SSP plants release hygroscopic dust and ammonia or fluoride fume. Cyclones take the coarse dust, scrubbers take the gas, and the fans behind them are in stainless steel or lined construction.
The gas at the fan
Granulator and dryer exhaust carrying hygroscopic fertilizer dust and ammonia or fluoride fume. Corrosive and sticky; lined or stainless construction after a scrubber or bag filter.
Selection for this duty
| Construction | Stainless steel or lined vessel with mesh pad or vane pack sized for the droplet load |
| Density at the fan | At about 90°C the gas density is close to 0.97 kg/m³, 81% of standard air. Pressure developed and power drawn fall in the same ratio, so the selection is made at this density and the motor is checked at cold start. |
Separates entrained liquid droplets from a vapour or gas stream, ahead of a compressor, a fan or a stack. Client-stated blade types for the Mist Eliminator in general: Demister Knockdown Vessel.
Industries
Other fans in fertilizer granulation plants
Mist Eliminator in other processes
Hot Dip Galvanising LinesWaste IncineratorsBiomedical Waste IncineratorsChemical Reactor and Tank VentsMVR EvaporatorsEffluent Treatment and Zero Liquid Discharge PlantsSulphuric Acid PlantsFlare and Pressure Relief SystemsGas Compressor StationsPaper Machine Dryer SectionsTextile Stenters and DryersPickling and Acid Treatment LinesCold Rolling MillsBOF Steel ConvertersEdible Oil Solvent Extraction Plants
Information needed to select or quote
- Gas volume and temperature. Actual flow at the inlet, normal and upset temperature, moisture.
- Dust or pollutant. Inlet loading, particle size distribution, whether it is abrasive, sticky, hygroscopic or combustible; for gases, the species and concentration.
- Required outlet. The emission limit or clean gas concentration the unit must meet.
- Site. Available space and height, material of construction preferences, and how the collected material is to be discharged.