Plug Flow of Bulk Solids Using Gas Pressure Control

[+] Author and Article Information
R. B. Emery

Sun Petroleum Products Company, Duncan, Okla.

J. Eng. Ind 101(1), 85-89 (Feb 01, 1979) (5 pages) doi:10.1115/1.3439479 History: Received August 04, 1977; Online July 15, 2010


This paper considers interstitial fluid pressure as an additional characteristic effecting bulk solids flowability. It describes a method for improving flow control of cement, powdered coal, sand, etc. through a converging hopper by applying particle stress-ratio control. In some applications, flowability of bulk solids can be modified rather than make costly modifications to the hopper. The patented method combines a baffle, a slot opening and gas pressure control modifying flowability in a converging channel. Plug-flow, a preferred type of mass flow, has been achieved flowing cement through hoppers open to the atmosphere as well as through enclosed, pressurized hoppers.

Copyright © 1979 by ASME
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