7
In comparison to other types of conveyors, screw conveyors
EXPLANATION
Biomass Fuel Characterization
- Operational Characteristics of Screw Conveyors:
- screw conveyor consists of a helical auger revolving inside a stationary U-shaped or cylindrical trough.
- Due to continuous rubbing friction between the material, auger flights, and trough wall:
- Power consumption is relatively high compared to belt conveyors or bucket elevators ($2-3$ times higher power).
- Continuous abrasive contact makes screw flights and bearings more susceptible to wear.
- Conclusion: Require relatively high power and are more susceptible to wear (Option 2).
Correct option: (2) Require relatively high power and are more susceptible to wear
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