Method and apparatus for bleaching pulps

Details Method and apparatus for bleaching pulps Method and apparatus for bleaching pulps

D - Textiles, Paper

21

C

92/60.1

D21C 9/10 (2006.01)

Patent

CA 2038651

This invention relates to a method and an apparatus for continuously bleaching fibrous lignocellulosic materials, for example wood pulps, in which the materials pre- impregnated with bleaching chemicals, form a continuous flow; the said materials being introduced by means of a feed hopper and a screwfeeder into a microwave cavity, heated and bleached by a supply of microwave energy and, after the completion of the heating, delivered from the said cavity into a retention chute where the bleaching action continues until its completion and, after the completion of bleaching, delivered from the bottom of said retention chute for further processing.

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