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1. 发明授权

US3597850A Continuous vacuum drier 失效
标题翻译：连续真空干燥机
公开(公告)号：US3597850A
公开(公告)日：1971-08-10
申请号：US3597850D
申请日：1970-03-11
申请人： NAT SERVICE IND INC
发明人： JENKINS JOHN W
IPC分类号： B29B13/06 , B29C47/10 , F26B17/12 , F26B21/04 , F26B3/08 , F26B17/00
CPC分类号： B29B13/065 , B29C47/0009 , B29C47/1018 , B29C47/1027 , F26B17/128 , F26B21/04
摘要： A continuous vacuum drier for removing moisture from solid synthetic resins in granular form prior to manufacturing into finished products. The synthetic resinous material is continuously supplied to the top of a closed drying hopper and removed from the bottom of the hopper. In one embodiment air withdrawn from the top of the hopper is circulated through a heater and is returned to the bottom of the hopper, where it travels upwardly through the synthetic resinous material in the hopper. In a second embodiment, air is withdrawn from the bottom of the hopper and is returned to the top of the hopper, where it travels downwardly through the synthetic resinous material in the hopper. The circulated air and the material in the hopper are heated as they pass grids of pipes which are heated by circulated hot water. In both embodiments, a vacuum pump is connected to reduce the air pressure in the system for increasing the efficiency of the drier and for causing the hopper to automatically fill with material to a predetermined level from a primary feeder hopper. A small amount of dry air may be introduced into the hopper for carrying off evaporated moisture. The dry material is fed by gravity from the bottom of the hopper to a processor.

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