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Screw conveyors are also critical in efficiency when used in bulk material transfer in industries like the manufacture of feeds, the handling of fertilizer, and material movement. Nonetheless, the blockages may arise during operations, which makes them less efficient and can destroy the equipment. At Shanghai Yuanyuda international Trade co., Ltd., we deal with feed and fertilizer machinery and we do know that smooth conveyor operation is important. Following are the important tips to avoid blockage in your screw conveyor system.
Choose the Right Screw Conveyor Design
The manner with which materials behave is bound to be different, hence the importance of choosing the right design:
Pitch and Diameter: This is because sticky or bulky materials are handled with larger pitches and diameters.
Trough loading: Do not overload, materials are not to fill more than 30-45 percent of the trough capacity.
Flight Type: depending on the nature of the material choose flights (ribbon, cut-flight, or paddle).
Considerations of inclination Angle:
Free-flowing materials are better conveyed using horizontal conveyors (0°-10°).
Index conveyors (10-20°) can need to have reduced speeds or special flights to avoid the back feed.
Steep angles (>20°) may require special construction (e.g. shaftless screws or tubular housings).
Proper Material Handling
Flow is influenced quite greatly by material properties. Deal with these problems in advance:
Pre-Process Materials: Over-sized particles are crushed or screen prior to feed.
Managers of Moisture: Drying agents or anti-caking can be used on sticky products (e.g. feed or fertilizer mixtures).
Avoid Overloading: Employ regulated feeders (e.g. Vibratory feeders, or rotary valves).
Bulk density and the assessment of Material Flowability:
Determine bridging risk by performing a test flowability (e.g. a shear cell tester).
Change through design or screw speed in relation to the bulk density (e.g., reduce speed of screw when dealing with a heavier material).
Regular Maintenance and Inspection
Preventive check-up reduces chances of blockage:
Maintenance of Screw-to-Trough Gap:
Use correct clearance (a few millimeters (under 10 mm) is quite typical) so that material does not concentrate and overwork the parts.
Check frequently to maintain flights or through liners.
Shaft Alignment: Alignment is better than drift phenomena - check alignment when routine maintenance happens.
Lubricate Bearings: Removes seizing and can keep in operation.
Clean Up: The residual of old material (e.g. hardened fertiliser) may lead to future blockages.
Install Safety and Monitoring Systems
The use of modern sensors leads to reliability:
Overload sensor: A system that keeps torque consciousness and closes the system before the blockages.
Vibration Monitor: Warning of operators of extreme friction or excessive construction.
Material level sensor: These over-fill and empty-run that disrupt the flow.
Emergency stop mechanism: Reduce the limit of loss in significant obstacles.
Operator Training and Best Practices
Even a quality gadget ceases to work when improperly abused. Train the personnel to:
Monitor flow Rates: A sharp fall in the output can be an indicator of a forming blockage.
Avoid inclusive Foreign Objects: Such as metal scraps or pieces of debris could get stuck into the screw.
Perform Start-Up/Shutdown Step by Step Instructions:
Start-Up: Check initial run on the conveyor empty to check smooth running later on to feed material.
Shutdown: Empty excess, (e.g. drain to empty) to avoid setting.
Conclusion
The perfect design, material evaluation and maintenance and intelligent monitoring are required to prevent screw conveyor blocks. In Shanghai Yuanyuda International Trade Co., Ltd., we offer quality performance feeds and fertilizer machines, such as blockage-resistant screw conveyors.
