EP 0455784 A4 19920408 - METHOD AND APPARATUS FOR RECOVERING PULP SOLIDS FROM WHITEWATER
Title (en)
METHOD AND APPARATUS FOR RECOVERING PULP SOLIDS FROM WHITEWATER
Publication
Application
Priority
US 43145689 A 19891103
Abstract (en)
[origin: WO9106704A1] A method of feeding a stream of whitewater (27) from a paper making process into a wedge-shaped zone between horizontal travelling upper and lower converging wire meshes (11, 12), applying a siphon means (10) to the upper mesh (12) in the zone to form a web (71) of solid fibrous material between meshes, separating the upper mesh (12) from the web (71) to leave it supported on the lower mesh (11) as meshes (11, 12) leave the zone; washing all solids from meshes (11, 12) into a receiving vessel (48) recycling the vessel contents to the paper making process; recovering in a pool (56) purified liquid from the siphon means (10), and recycling such liquid for use in showers and the like in the paper making process. Preferably, another stream of an aqueous dispersion of pulp via pipe (66) is introduced adjacently below the upper mesh (12) to cause pulp to form on such mesh (12) which enhances removal of entrained solids from the whitewater. Apparatus to perform the above method is also provided.
IPC 1-7
IPC 8 full level
CPC (source: EP)
Citation (search report)
- [Y] AT 333115 B 19761110 - ARLEDTER HANNS F DR ING [AT], et al
- [YD] EP 0258918 A1 19880309 - AWE ANTI WEAR ENG SRL [IT]
- [Y] GB 2143871 A 19850220 - BELOIT WALMSLEY LTD
- See references of WO 9106704A1
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
WO 9106704 A1 19910516; BR 9006989 A 19920128; CA 2045515 A1 19910504; EP 0455784 A1 19911113; EP 0455784 A4 19920408; JP H04505190 A 19920910
DOCDB simple family (application)
US 9006496 W 19901102; BR 9006989 A 19901102; CA 2045515 A 19901102; EP 90917507 A 19901102; JP 50052691 A 19901102