The process
Shredded tyres, refuse derived fuel and biomass fed to the kiln or calciner are received, shredded, dried and conveyed with dust extraction and fume control at each stage, and blown into the burner by high pressure blowers.
The gas at the fan
Fibrous or stringy material that wraps a shrouded wheel. An open or straight radial impeller, spark resistant where the fibre is combustible, placed before or after the collector as the material allows.
Selection for this duty
| Blade form | Radial tipped, or backward inclined where the fan sits after the collector |
| Material of construction | Mild steel |
| Drive and bearings | Direct coupled or belt driven; belt drive where the duty point may need tuning at site |
| Also specified | Spark resistant construction with non-ferrous rubbing parts, shaft seal, earthing and a flameproof or increased safety motor; access doors on the scroll and a wheel that can be cleaned in place |
| Density at the fan | At about 35°C the gas density is close to 1.15 kg/m³, 95% 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. |
Delivers combustion, aeration and conveying air where the system resistance runs to several thousand millimetres of water column in a single stage. Client-stated blade types for the High Pressure Blower in general: Backward curved and radial tipped.
Industries
Other fans in alternative fuel handling in cement plants
High Pressure Blower in other processes
CFBC BoilersCement Preheater KilnsVertical Roller Raw MillsCement Grinding MillsVertical Shaft Lime KilnsGlass Melting FurnacesGlass Forming and Annealing LehrsFertilizer Granulation PlantsFertilizer Rotary Dryers and CoolersSulphuric Acid PlantsFluid Bed Dryers and CoolersFlour and Grain MillsCarbon Black PlantsAsh Handling SystemsCaptive Power PlantsPneumatic Conveying SystemsSilo Aeration and FluidisationWater and Wastewater Treatment PlantsGlass Batch HousesGas Based DRI PlantsSugar Dryers and SulphitationAnimal Feed Mills
Services on this fan
Fan and System Performance TestingRetrofit of Low Efficiency FansRotor Replacement and Performance EnhancementDynamic Balancing and Vibration AnalysisCondition Monitoring and TroubleshootingInstallation, Commissioning and After-sales Support
Information needed to select or quote
- Duty point. Volume flow and static pressure at the fan inlet, with the gas density and temperature or the conditions to derive it.
- Operating conditions. Site altitude, normal operating temperature and continuous or intermittent duty.
- Gas stream. Dust loading and particle size, corrosive species, moisture, upset temperature and any tendency of the material to deposit on the impeller.
- Mechanical. Rotation viewed from the drive end, discharge orientation and motor power.