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매체유동층에서 PVC수지의 건조특성

Drying characteristics of PVC Resin in an Inert Medium Fluidized Bed

이동현 김상돈

Lee DH Kim SD

HWAHAK KONGHAK, June 1994, 32(3), 463-468(6), NONE

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Abstract

매체유동층 건조기에서 열풍온도(80-110℃), 열풍유속(0.32-0.67m/s)과 PVC resin 공급속도(0.048-0.192kg/hr)가 건조효율에 미치는 영향을 내경 0.083m, 높이 1.2m인 stainless steel column에서 결정하였다. 매체유동층에서 건조효율은 PVC resin공급속도에 따라서는 증가하지만 열풍온도와 유속에 따라서는 감소하였다. 또한 유동층으로 유입되는 열풍의 질량유속과 건조처리된 PVC resin의 질량유속의 비인 mass loading에 따라서는 건조효율이 증가하였다. 매체유동층에서 PVC 수지의 건조효율을 mass loading과 Kossovich 수로 표현된 무차원관계식으로 제시하였다.

The effects of the inlet gas temperature(80-110℃), the gas velocity(0.32-0.67m/s) and the feed rate of PVC resin(0.048-0.192kg/hr) on the drying efficiency have been determined in a 0.083m-ID 1.2m-high stainless steel column. The drying efficiency in an inert medium fluidized bed increases with increasing the feed rate of PVC resin, but it decreases with increasing the inlet gas temperature and gas velocity. The drying efficiency increases with increasing the mass loading which is the mass ratio of inlet gas to the dried PVC resin from the bed. The drying efficiency of PVC resin in an inert medium fluidized be has been correlated with the mass loading and Kossovich Number.

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References

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