System and method for operating a pulp mill

Details System and method for operating a pulp mill System and method for operating a pulp mill

1996-08-22

1998-07-21

Czaja, Donald E.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 63, 162237, 162246, D21C 300

Patent

active

057830371

ABSTRACT:
A pulp mill includes a digester which contains a raw material, a digesting medium, and a source of steam. Oxygen is injected into the steam line, at a point which minimizes exposure of the oxygen to the steam outside of the digester. The oxygen can also be injected directly into the digester. The oxygen speeds the chemical reactions in the digester, allowing the digesting process to be completed with a reduced quantity of chemicals and/or steam, and at a faster rate. The present invention improves the quality of the effluents from a pulp mill, and makes it easier for the operator of the mill to comply with environmental regulations.

REFERENCES:
patent: 3654070 (1972-04-01), Pradt et al.
patent: 4274913 (1981-06-01), Kikuiri et al.

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