Belt conveyors arrangements

A typical belt conveyor arrangement is shown in Eigure 1. These conveyors can be arranged horizontally and with inclined or declined sections combined with convex and concave curves. The desired path of travel is limited only by the strength of the belt and the permissible angle of incline or decline for the particular situation. 

Figure 5.9. Some arrangements of belt conveyors (Stephens-Adamson Co.) and types of idlers (FMC Corp.). (a) Horizontal conveyor with discharge at an intermediate point as well as at the end. (b) Inclined conveyor, satisfactory up to 20° with some materials, (c) Inclined or retarding conveyor for lowering materials gently down slopes, (d) A flat belt idler, rubber cushion type, (e) Troughed belt idler for high loadings usually available in 20°, 35°, and 45° side inclinations.

Figure 5.10. Closed belt (zipper) for conveying in any direction (Stephens-Adamson Co.), (a) Arrangement of pulley, feed hopper and open and closed belt regions, (b) The tubular belt conveyor for horizontal and vertical transport a section of the zippered closed belt is shown, (c) Showing how the zipper closes (on downward movement of the belt in this sketch) or opens (on upward movement of the belt).

Belt conveyors are widely used to transport run-of kiln quicklime to the processing plant, llie conveyors should be enclosed to prevent wind-whip (as well as to keep off rain). Transfer points should be fitted with hoods and dust extraction. Bag filters are generally preferred, with the collected dust being discharged on to the down-stream conveyor. Conveyor discharge points should be arranged to minimise free-fall and should either be enclosed, or fitted with dust extraction. 

The filled sacks are conveyed, by the shortest possible routes, to the despatch loading bays. The number of transfer points from one one belt conveyor to another should also be as few as possible, for at each transfer the sack receives a jolt, causing its contents to shift over to one side. As a result the sacks become somewhat lopsided in thickness and more difficult to stack. Arrangements to achieve smooth jolt-free transfer from one belt to the next will avoid abrupt changes in level, e.g., by means of curved transition belts. 

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