摘要：针对某聚丙烯酰胺流化床干燥器旋风分离器排料困难、颗粒回收效率低等问题,指出其原因在于灰斗结构不合理,造成排料口负压过大,导致返料风机难以将分离下的颗粒送回干燥器;提出在灰斗内增加新型内构件,以减小排料口压降的改进措施;通过冷态对比实验,对新型内构件的效果进行检验。结果表明:增设新型内构件后,排料口压降降幅达60%以上,分离效率和压降变化较小;排料口静压大幅提高,返料效果得到显著改善。

关键词：旋风分离器；灰斗；聚合物颗粒；回收

Abstract：Aiming at the problems of discharging difficulty and low recovery efficiency of cyclone separators in a poly-acrylamide(PAM) fluidized-bed dryer, the main reason was given that the high pressure drop of the cyclone dust exit made it difficult for the recycling fan to send the collected particles back to the dryer. A new cyclone separator with special internals in its dust bin was developed. Two models of the new cyclone and the original one were fabricated and a comparative test was conducted. The results show that the pressure drop of dust exit of the new cyclones is reduced by 60%, while the separation efficiency and pressure drop are little influenced. The new cyclone has a much better ability to recycle the collected particles because its static pressure at the dust exit is greatly increased.

Keywords: cyclone separator；dust bin；polymer particle；recycling