Topic
Screw conveyor
About: Screw conveyor is a research topic. Over the lifetime, 4290 publications have been published within this topic receiving 16655 citations.
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TL;DR: In this paper, a numerical study of the shape of an enclosed screw conveyor on mixing and heat transfer in a horizontal gas-solid fluidized bed was conducted using computational fluid dynamics (CFD).
Abstract: A numerical study of the effects of the shape of an enclosed screw conveyor on the mixing and heat transfer in a horizontal gas–solid fluidized bed was conducted using computational fluid dynamics (CFD) A two-fluid model (TFM) was employed to model the gas and solid phases as continua through mass, momentum, and energy conservations The motion of the screw conveyor was simulated by using a rotating reference frame (RRF) such that the computational mesh was free from dynamic reconstruction The diameters of the screw flight and shaft, the pitch, and the blade thickness were varied in the parametric study Under the operating conditions studied, it was found that the increase in the diameter of the screw flight results in the enhancement of the solid mixing and conveyance The increase in the diameters of the screw shaft and the screw blade thickness lead to the enhanced solid mixing but reduced conveyance The variation in the screw pitch gives rise to rather complex behaviors in the solid mixing and conveyance As the screw pitch is decreased, the solid mixing increases initially but then decreases before it increases eventually The solid conveyance capability was found to first increase and then decrease Explanations to the effects of the shape of the screw conveyor were discussed in this work
56 citations
Patent•
05 Jun 1981
TL;DR: A self-propelled pavement lane apparatus comprising a radial-frequency microwave generator extending across one lane of the roadway having an antenna with a slotted waveguide directed toward the roadway for heating a lane-wide stretch of roadway is described in this paper.
Abstract: A self-propelled pavement lane apparatus comprising a radial-frequency microwave generator extending across one lane of the roadway having an antenna with a slotted waveguide directed toward the roadway for heating a lane-wide stretch of the roadway. A ripping device is provided behind the microwave generator to rip up pavement which was heated by the microwave generator. A screw conveyor conveys the heated and ripped pavement inwardly toward a central axis of the apparatus where it is fed by a chute to a mixing chamber containing counter-rotating mixing blades. Fresh bituminous binder and/or filler may be added to the mixing chamber to be mixed with the ripped pavement which is then discharged from the mixing chamber by a second screw conveyor, to be distributed across the lane. Following the second screw conveyor is a finished plate for initially compacting the refinished surface. The apparatus includes a tank for containing hydraulic fluid for operating a generating unit to power the microwave generator as well as tanks for the filler and binder.
54 citations
Patent•
23 Sep 1993
TL;DR: In this article, a compaction apparatus has a screw conveyor for conveying waste material through a passage and compacting it therein, and an exit nozzle is arranged to communicate with the passage.
Abstract: A compaction apparatus (2) has a screw conveyor (4) for conveying waste material through a passage (6) and compacting it therein. An exit nozzle (10) is arranged to communicate with the passage (6). The nozzle (10) has a transverse internal cross-sectional area which enlarges and reduces respectively in response to increasing and decreasing material pressure.
53 citations
TL;DR: In this paper, a screw conveyor is modified by adding three complementary helices oriented in the same or the opposite direction from screw blades to increase the particle path length and increase the quality of mixing.
50 citations