Paper making and fiber liberation – Apparatus – Digester
Patent
1978-05-22
1980-07-15
Bashore, S. Leon
Paper making and fiber liberation
Apparatus
Digester
162239, 162246, 162253, 422109, 422110, D21C 708, D21C 712, D21C 1106
Patent
active
042127050
ABSTRACT:
A processing system including a pressurized blow tank for receiving the high pressure discharge from a wood pulp digester and utilizing the digester steam in evaporators or other heat recovery units. The blow tank which receives the treated cellulose, cooking liquor and high pressure steam from the digester also provides some additional fiber conditioning since the cellulose remains under significant pressure and temperature during the interval before it is discharged from the blow tank. A valve is provided in the blow tank for withdrawing high pressure steam separately from the cooking liquid and treated cellulose, and the valve is operated by a controller responding to pressure sensed in the blow tank. Cold cooking liquor is pumped into the blow tank in response to temperatures measured in the blow tank and the temperature of the cold liquor itself. Alternately the flow of additional cooking liquor can be controlled in response to levels sensed in the blow tank. To prevent bridging of cellulose in the tank multiple sprays are provided about the circumference of the tank for spraying cooking liquor onto the cellulose as required. Discharge from the blow tank of a slurry of cellulose and cooking liquor is through a perforated plate mounted in the bottom of the blow tank and having a rotor rotating above its inlet side.
REFERENCES:
patent: 1469958 (1923-10-01), Richter
patent: 1947707 (1934-02-01), French
patent: 2592983 (1952-04-01), Hildebrandt
patent: 3007839 (1961-11-01), Richter
patent: 3035963 (1962-05-01), Schnyder
patent: 3064726 (1962-11-01), Rosenblad
patent: 3081820 (1963-03-01), Schnyder
patent: 3172802 (1965-03-01), Rosenblad
patent: 3298899 (1967-01-01), Laakso
patent: 3362868 (1968-01-01), Backlund
patent: 4010666 (1977-03-01), Olson et al.
Gavelin "DTF--A New Chip Refiner Process Pioneered in Sweden;" Pulp and Paper Intl.; Jan. 1977.
Babington, Jr. William M.
Bridge Adam P.
Alvo Steve
Bashore S. Leon
LandOfFree
Apparatus for recovering high pressure steam from a blow tank 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 for recovering high pressure steam from a blow tank, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for recovering high pressure steam from a blow tank will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-462731