Abstract: Methods and apparatus are disclosed for filling solid particles into a vertical tube by conveying the particles downwardly into the tube along a loading tool that softens the fall of the particles and provides even filling of the tube. The loading tool includes a center member and a plurality of damper members that can be adapted in particular cases to the actual type of particles and the tube diameter. The damper members can be stiff or flexible since they do not occupy a substantial portion of the cross section of the tube at any particular axial location. In operation, the center member can be jerked during the filling operation while simultaneously being lifted up gradually as the tube fills or it can be sequentially lifted. The damper members reduce the falling velocity of the particles and divert the particles from falling in straight downward paths. This avoids bridge formation and breakage of the particles during filling.

Abstract: Methods and apparatus prevent breakage of a catalyst particle and evenly fill the catalyst into tubes to an optimum density. A loading tool comprises a plurality of damper members extending from a centerline of the tube in at least one radial direction but in every case, having a diameter smaller than the inner diameter of the tube. For example, in one embodiment the damper members are shaped in a “Z”-like formation with each having a different rotational orientation than the adjacent one above or below it. The Z formations can be horizontally arranged along a central member or can be formed vertically in a unitary fashion from a single, stiffened member. In another embodiment, the dampers are formed into spiral or helical shapes that increase or decrease in diameter along the length of the tube.