EP 0909207 A4 20001004 - RADIAL-FLOW FLUIDIZABLE FILTER
Title (en)
RADIAL-FLOW FLUIDIZABLE FILTER
Title (de)
FLUIDISIERBARES FILTER MIT RADIALER STRÖMUNG
Title (fr)
FILTRE FLUIDISABLE A ECOULEMENT RADIAL
Publication
Application
Priority
- US 9708942 W 19970523
- US 1816896 P 19960523
- US 2367996 P 19960817
Abstract (en)
[origin: WO9744111A1] A radial-flow filter (120) employing nonbonded granular particles (56) for filtering impurities from an influent, and that can be backwashed by fluidizing the granular particles (56) to free the impurities therefrom. During a backwashing operation, a backwash liquid applies an upwardly-directed drag force on an upper portion of the granular particles (56) to lift the same into a backwash chamber (62) for fluidization. Once the top portion of the granular particles (56) of the filtration bed is fluidized, the backwash liquid applies an upward force on a subsequent portion of the granular bed, thereby fluidizing the granular particles (56) in the backwash chamber (62). Subsequent sections of the granular bed are fluidized in a similar manner to thereby completely clean the granular particles (56). After the backwash operation, the granular particles (56) fall back to the filtration chamber (156) and form a filter bed for carrying out a filtration operation.
IPC 1-7
IPC 8 full level
B01D 24/08 (2006.01); B01D 35/153 (2006.01)
CPC (source: EP)
B01D 24/08 (2013.01); B01D 24/42 (2013.01); B01D 24/4631 (2013.01); B01D 24/4668 (2013.01); B01D 35/153 (2013.01); B01D 2201/44 (2013.01)
Citation (search report)
- [XY] US 4643836 A 19870217 - SCHMID LAWRENCE A [US]
- [YA] US 4019985 A 19770426 - FULLER MATTHEW H, et al
- See references of WO 9744111A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9744111 A1 19971127; AU 3473997 A 19971209; AU 715029 B2 20000113; CA 2256385 A1 19971127; CA 2256385 C 20051206; CN 1080131 C 20020306; CN 1226182 A 19990818; EP 0909207 A1 19990421; EP 0909207 A4 20001004; HK 1022114 A1 20000728; MX PA98010890 A 20040521
DOCDB simple family (application)
US 9708942 W 19970523; AU 3473997 A 19970523; CA 2256385 A 19970523; CN 97196727 A 19970523; EP 97930996 A 19970523; HK 00100902 A 20000215; MX 9810890 A 19970523