Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1993-06-02
1994-05-10
Lithgow, Thomas M.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
210703, 210805, 210776, 2102212, 209170, B03D 102
Patent
active
053104595
ABSTRACT:
An apparatus and method for de-inking waste paper pulp using a foam flotation process to recycle printed waste paper for the manufacture of new paper. Pulped printed paper is fed as a slurry to an inlet of a shallow tank. Internal guide walls in the tank establish a flow path from the inlet to an outlet. The walls are sized and positioned to create a generally uniform cross-sectional flow area. A plurality of modules are disposed along the flow path. Each module includes at least one injector that aerates the flow and an extractor that removes floated ink foam. A portion of the flow from each module is recycled to an upstream module, preferably by a conduit and associated pump. In a preferred form, an injector (or injectors) alone located at the inlet is fed by the next downstream module and an extractor alone is located near the outlet. The invention also includes a main recycling loop from the downstream end of the flow path to the upstream end. This main recycling loop has a large flow rate compared to the recycled flow between the modules.
REFERENCES:
patent: 2248177 (1941-07-01), Karlstrom
patent: 3452870 (1969-07-01), Katsuta et al.
patent: 3495712 (1970-02-01), Schreiber
patent: 3642617 (1972-02-01), Brink et al.
patent: 3769207 (1973-10-01), Baer
patent: 3986954 (1976-10-01), George et al.
patent: 4022696 (1977-05-01), Krofta
patent: 4146478 (1979-03-01), Rongved
patent: 4151093 (1979-04-01), Krofta
patent: 4157952 (1979-06-01), Krofta
patent: 4184967 (1980-01-01), Krofta
patent: 4186094 (1980-01-01), Helberg
patent: 4331534 (1982-05-01), Barnscheidt
patent: 4377485 (1983-03-01), Krofta
patent: 4399028 (1983-08-01), Kile et al.
patent: 4512888 (1985-04-01), Flynn
patent: 4512895 (1985-04-01), Reid
patent: 4620926 (1986-11-01), Linck et al.
patent: 4622132 (1986-11-01), Chupka
patent: 4626345 (1986-12-01), Krofta
patent: 4721562 (1988-01-01), Barnscheidt et al.
patent: 4722784 (1988-02-01), Barnscheidt
patent: 4952308 (1990-08-01), Chamberlain
patent: 5022984 (1991-06-01), Pimley et al.
patent: 5028315 (1991-07-01), Cruea et al.
patent: 5069751 (1991-12-01), Chamblee et al.
patent: 5242585 (1993-09-01), Krofta
Lenox Institute for Research, Inc.
Lithgow Thomas M.
LandOfFree
Apparatus and method for deinking waste paper pulp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for deinking waste paper pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for deinking waste paper pulp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2411166