JP2581600B

PURPOSE:To drastically reduce odd times conventionally needed, to increase the filtration rate and to reduce the running cost by releasing the concd. sludge with a filtrate without discharging the unconcentrated sludge as seen in the conventional method. CONSTITUTION:A closed vessel 1 is separated i...

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Bibliographic Details
Main Authors ETO MASANORI, MOTOHASHI HIROSHI, MITSUI YASUHIRO, EGAWA SHINICHIRO
Format Patent
LanguageEnglish
Published 12.02.1997
Edition6
Subjects
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PURPOSE:To drastically reduce odd times conventionally needed, to increase the filtration rate and to reduce the running cost by releasing the concd. sludge with a filtrate without discharging the unconcentrated sludge as seen in the conventional method. CONSTITUTION:A closed vessel 1 is separated into a sludge concentrating part 3 and a liq. collecting part 4, and a cylindrical filter element 11 with one end opened and the other end closed is arranged in the concentrating part 3. The open end is allowed to communicate with the liq. collecting part 4 in this sludge filtering and concentrating device. When the concd. sludge deposited on the outside of the element 11 is released and discharged, the supply of sludge is stopped, the upper part of the concentrating part 3 is opened to the atomosphere without discharging the unconcentrated sludge in the concentrating part 3, the filtrate is allowed to flow to the concentrating part 3 from the liq. collecting part 4 by the pressure difference produced to release the concd. sludge deposited on the element 11, and the released sludge is discharged to the outside of the vessel. As a result, the odd times conventionally needed are drastically reduced, and the filtration rate is increased.
Bibliography:Application Number: JP19890271546