Method and apparatus for recycling paper pulp sludge

Details Method and apparatus for recycling paper pulp sludge Method and apparatus for recycling paper pulp sludge

D - Textiles, Paper

21

D

92/34

D21D 1/00 (2006.01)

Patent

CA 2021149

This invention provides a method and apparatus for recycling paper pulp sludge. Paper pulp sludge is incinerated in a rotary kiln, typically a rotary cement kiln, asphalt dryer, or fluidized bed incinerator. Paper pulp sludge is fed continuously into said rotary kiln while temperatures are maintained in the range of approximately 800° to 3500°F. During incineration, mixing catalysts (typically casein or soy protein) and wood pulp fibers are burned, while moisture is evaporated. The resulting incinerated product consists essentially of carbonate particles which are collected for subsequent use. Typically, but not exclusively, later use of the resulting product could be as mineral filler binding agents in the manufacture of construction products such as concrete, asphalt and others; or in gravel-based construction operations; or in earthen-fill constructions operations; or in other ways.

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