The process
Spinning mills run humidification plants that hold the department at the right humidity and waste collection systems that draw lint and fly from the machines into rotary filters. Large volumes of air at low pressure, with fibre that wraps a wheel.
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
| Construction | Axial fans in weatherproof cowls, or supply and exhaust units with filters as the air quality requires |
| 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. |
A packaged unit with fan, filters, cooling or heating coil and mixing box that conditions and delivers supply air. Pre, fine and HEPA filters as the air quality requires. Client-stated blade types for the AHU in general: Backward curved and forward curved.
Industries
Other fans in spinning mills
AHU in other processes
Pharmaceutical Clean RoomsFood and Dairy Spray DryersAutomotive Paint ShopsNuclear Facility VentilationHospitals and LaboratoriesData Centres and Equipment RoomsPharmaceutical Coating and Granulation
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.