Filtration process and equipment studies for coal liquefaction processes. Quarterly report, September--November 1976
Year: 1976
Type: report
Abstract: Record flow rates for Tacoma Filter Feed in the order of 400 pounds/square foot of total filter area/hour were obtained. These rates were obtained at 600/sup 0/F and 40 psi differential pressure. The highest previous rate of 313 pounds/square foot/hour was obtained under similar conditions, but at 509/sup 0/F temperature. As a result of having studied Tacoma Filter Feed in great detail, an experimental design was worked out to characterize filtration properties of other liquids in a minimum amount of time. Using this experimental design, filtration properties of uncentrifuged Synthoil and Wilsonville Filter Feed were determined. Maximum rates for Tacoma, Wilsonville, and Synthoil materials were in the order of 400, 460, and 270 pounds/square foot/hour, respectively, at 600/sup 0/F, 35 psid, and 5 second immersions of the test leaf. A series of runs was made during which the knife was not advanced to determine the amount of leakage, if any, that might occur around the edge of the precoat. After eighteen 5 second immersions during which a /sup 3///sub 32/-inch cake was allowed to build up on the precoat, the filtration rate was 45 pounds/square foot/hour. Tests run on two grades of precoat material of different permeabilities indicate that lower knife cuts can be made with the lower permeability material without sacrificing rate.
DOI: 10.2172/7295128
Authors: G. Smith, P. Martin
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W283614774