| 摘要 |
<p>Improved apparatus for mechanically stirring a quench-cooled subfluidized particulate bed of polymerized monomer lowers lumping of polymer particles by using substantially contiguous paddle stations (S-1, S-2, S'-1, S'-2) disposed along the drive shaft (104) within the reactor (101) in combination with a plurality of sub-stations (A, B, C) in at least one paddle station class, each sub-station having a width along the shaft (104) of no more than 50 percent of the total width of the paddle station, and sub-station paddles attached to the shaft (104) at each sub-station so as to sweep through the particulated bed. In some embodiments, a first class of stations is, advantageously, disposed within the reactor (101) along a portion of the drive shaft (104) in repeating groups of at least two stations and a second class of stations with sub-stations is disposed within the reactor (101) along another portion of the drive shaft (104), preferably in repeating groups of at least one more than the number of stations in the repeating group of the first class, to further reduce lumping of polymer particles.</p> |
