Apparatus for bleaching high consistency pulp with a gaseous ble

Details Apparatus for bleaching high consistency pulp with a gaseous ble Apparatus for bleaching high consistency pulp with a gaseous ble

1997-09-29

1999-08-24

Alvo, Steven

Paper making and fiber liberation

Apparatus

Digester

162243, 162246, D21C 706, D21C 712, D21C 9153

Patent

active

059420880

ABSTRACT:
A method and apparatus for bleaching high consistency pulp with a gaseous bleaching reagent. The pulp is shredded and then fluffed in the presence of a contacting gas which includes the gaseous bleaching reagent within an upstream vessel comprising a pin/foil contactor so as to suspend the pulp in the contacting gas and react the bleaching reagent with the pulp. The pulp is retained in the contactor for a predetermined time which is sufficient to consume about 75% to about 90% of a selected dose of the gaseous bleaching reagent which is required to delignify the high consistency pulp from an initial Kappa number to an intermediate Kappa number. The pulp and contacting gas are then separately supplied to a porous bed reactor where the reaction of the selected dose of the gaseous bleaching reagent with the pulp is substantially completed so as to further delignify the high is consistency pulp from the intermediate Kappa number to a final Kappa number.

REFERENCES:
patent: 1827710 (1931-10-01), Kuchenmeister
patent: 2627668 (1953-02-01), Handwerk
patent: 2722163 (1955-11-01), Cumpston, Jr.
patent: 2756646 (1956-07-01), Jones
patent: 2963086 (1960-12-01), Green
patent: 3145936 (1964-08-01), Monks
patent: 3243129 (1966-03-01), Jones
patent: 3293117 (1966-12-01), Pennington, Jr. et al.
patent: 3309031 (1967-03-01), McMahon et al.
patent: 3387796 (1968-06-01), Cormack et al.
patent: 3471093 (1969-10-01), Weinert
patent: 3579717 (1971-05-01), Middlebrooks
patent: 3630828 (1971-12-01), Liebergett et al.
patent: 3725193 (1973-04-01), De Montigny et al.
patent: 3785577 (1974-01-01), Carlsmith et al.
patent: 3814664 (1974-06-01), Carlsmith
patent: 3917176 (1975-11-01), Carlsmith
patent: 3964962 (1976-06-01), Carlsmith
patent: 4080249 (1978-03-01), Kempf et al.
patent: 4096027 (1978-06-01), Sherman
patent: 4123317 (1978-10-01), Fritzvold et al.
patent: 4278496 (1981-07-01), Fritzvold
patent: 4279694 (1981-07-01), Fritzvold et al.
patent: 4283251 (1981-08-01), Singh
patent: 4298426 (1981-11-01), Torregrossa et al.
patent: 4303470 (1981-12-01), Meredith et al.
patent: 4426256 (1984-01-01), Johnsen
patent: 4468286 (1984-08-01), Johnsen
patent: 4581104 (1986-04-01), Luthi
patent: 4664320 (1987-05-01), Steffens
patent: 4729516 (1988-03-01), Williams, Jr.
patent: 4744722 (1988-05-01), Sampi et al.
patent: 5087326 (1992-02-01), Jones
patent: 5174861 (1992-12-01), White et al.
patent: 5181989 (1993-01-01), White et al.
patent: 5188708 (1993-02-01), Griggs et al.
patent: 5198075 (1993-03-01), La Bruniere et al.
patent: 5277371 (1994-01-01), Bowns et al.
patent: 5364038 (1994-11-01), Prew
patent: 5409570 (1995-04-01), Griggs et al.
patent: 5451296 (1995-09-01), Pikulin et al.
patent: 5562806 (1996-10-01), Abdulmassih et al.
patent: 5626297 (1997-05-01), Carlsmith et al.
patent: 5630909 (1997-05-01), LaRiviere

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