METHOD AND SYSTEM FOR OXYGEN DELIGNIFICATION OF CELLULOSE PULP
收藏国家林业和草原科学数据中心2023-02-12 更新2024-03-07 收录
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The invention relates to an improved oxygen delignification stage located between 2 wash positions (W1， W2) in a fiberline producing bleached qualities of cellulose pulp. The inventive method and system divide the oxygen stage into at least 2 phases， and after the first phase is the pulp suspension effectively depressurized and vented to atmosphere in order to vent away the bulk volume of inert gases formed during the first phase. The partial pressure of oxygen added to final phase may thus be increased and the amount of oxygen dissolved in the liquid phase is increased enabling better delignification of the cellulose pulp in the final phase. The invention relates to an improved oxygen delignification stage located between 2 wash positions (W1， W2) in a fiberline producing bleached qualities of cellulose pulp. The inventive method and system divide the oxygen stage into at least 2 phases， and after the first phase is the pulp suspension effectively depressurized and vented to atmosphere in order to vent away the bulk volume of inert gases formed during the first phase. The partial pressure of oxygen added to final phase may thus be increased and the amount of oxygen dissolved in the liquid phase is increased enabling better delignification of the cellulose pulp in the final phase.
提供机构：
国家林业和草原科学数据中心
创建时间：
2023-02-12
