Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Patent
1997-03-05
1998-08-11
Husar, John M.
Solid material comminution or disintegration
Processes
With application of fluid or lubricant material
241 21, 241 4617, 241 791, B02C 1912, B02C 2318
Patent
active
057915660
ABSTRACT:
An improved apparatus for submerged grinding of wastes includes a vessel that is filled with an alkaline liquid and which has a mechanism for grinding a feed waste containing organic solids, a feeding mechanism for charging the feed waste into the vessel, a primary screening mechanism for filtering the liquid being discharged from the grinding mechanism and a secondary screening mechanism by which the waste/liquid mixture that has been filtered by the primary classification mechanism is freed of the liquid fraction such that the waste is converted into a slurry. The apparatus further includes a line by which the filtrate from the secondary classification mechanism is returned to the liquid with which the vessel is filled, a mechanism for adding an alkaline aqueous solution and/or particulate matter into the liquid with which the vessel is filled, a mechanism for detecting the pH of the liquid with which the vessel is filled, and a mechanism for adjusting the amount of addition of the alkaline aqueous solution and/or particulate matter into the liquid with the vessel is filled on the basis of the value detected by the pH detecting mechanism in order to ensure that the liquid with which the vessel is filled is maintained in an alkaline condition. Using this apparatus, submerged grinding of wastes can be accomplished over an extended period with the progress of putrefaction being retarded and the emission of malodor being suppressed with the resulting advantage of facilitated liquid maintenance.
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Higo Tsutomu
Kondo Kazuhiro
Serikawa Roberto Masahiro
Ebara Corporation
Husar John M.
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