Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Patent
1993-03-22
1995-01-24
Watts, Douglas D.
Solid material comminution or disintegration
Processes
With application of fluid or lubricant material
241247, 2412611, B02C 706, B02C 2302
Patent
active
053836081
ABSTRACT:
Apparatus and method for the mechanical refining of high consistency lignocellulosic feed material in a frustroconical refining zone, by facilitating the backflow of steam generated in the refining zone through the upstream feed zone which, despite the backflow of steam, imparts outward force on the feed material sufficient for the material to enter the refining zone and pass therethrough, without blockage or flow interruption. This is accomplished by providing, immediately upstream of the frustroconical refining zone (46), a hybrid feed/grinding zone (104), which acts on the wood chips with relatively high refining intensity at low refining power, so as to reduce the size of the material and outwardly convey the material by centrifugal force into the frustroconical refining zone against the backflowing steam, but without generating steam in the hybrid zone. The hybrid zone receives chips from a feed screw (84) which preferably rotates at the same speed as the rotor (20) portion of the frustroconical refining zone and hybrid zone. The feed screw is shaped (e.g., as a ribbon screw) so that the chip material is easily "handed-off" to the entry of the hybrid zone, while establishing an open channel (166) between the chip material and the shaft of the feed screw, for conveying backflowing steam away from the hybrid zone. First pressure control means (136) are provided in fluid communication with the backflow steam channel, for removing the backflowing steam from the refiner at a controlled pressure, thereby controlling the retention time of the material in the frustroconical refining zone (146).
REFERENCES:
patent: 3427690 (1969-02-01), Haug
patent: 3893631 (1975-07-01), Fisher et al.
patent: 3984057 (1976-10-01), Pilao
patent: 4253613 (1981-03-01), Reinhall
patent: 4283016 (1981-08-01), Reinhall
patent: 4401280 (1983-08-01), Reinhall
patent: 4610400 (1986-09-01), Sjobom
patent: 4872617 (1989-10-01), Forsman
patent: 4908101 (1990-03-01), Frisk et al.
patent: 5076892 (1991-12-01), Fisher et al.
patent: 5127591 (1992-07-01), Bernhard et al.
Dahiqvist Karl T. G.
Haider Franz
Kohler Gregory R.
Krasser Josef
Lahner, III William F.
Andritz Sprout-Bauer, Inc.
Watts Douglas D.
LandOfFree
Twin conical refiner with dual ribbon feeders does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Twin conical refiner with dual ribbon feeders, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Twin conical refiner with dual ribbon feeders will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1463487