Method and apparatus for removing scales deposited on the strain

Details Method and apparatus for removing scales deposited on the strain Method and apparatus for removing scales deposited on the strain

1994-06-14

1996-10-15

Czaja, Donald E.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With cleaning, preserving or conditioning of apparatus

162251, D21C 714

Patent

active

055650619

ABSTRACT:
A wood pulp digester comprising a containing structure defining a digesting chamber in which wood chips and processing liquor are contained under pressure. Liquor is moved from a liquor removal region in the digester through a strainer. Periodically a cleaning solvent is directed under pressure in a counterflow direction through the strainer to remove scaling that may tend to accumulate on the strainer.

REFERENCES:
patent: 2003347 (1935-06-01), Dreyfus
patent: 2845347 (1958-07-01), Byrne
patent: 3589521 (1971-06-01), Richter
patent: 4496426 (1985-01-01), Baumeister et al.
patent: 5116475 (1992-05-01), Edlund et al.
patent: 5366592 (1994-11-01), Ford

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