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US 2009/0151880 A1Published application
Method and system to enhance fiber development by addition of treatment agent during mechanical pulping
AssigneeAndritz Inc.
InventorsJohann Aichinger, Marc Sabourin, Jan Hill, Johann Grossalber
Life of this patent
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Abstract
A mechanical pulping method including: defibrating a comminuted cellulosic material; mechanically refining the defibrated cellulosic material in a primary refining step; introducing to the cellulosic material at least one of a chemical agent and a biological during the defibration step or the mechanical refining step, and producing pulp from the refined and defibrated cellulosic material.
Claims20
A mechanical pulping method comprising:
- defibrating a comminuted cellulosic material in a pre-treatment step;
- mechanically refining the defibrated cellulosic material in a primary refining step;
- introducing to the cellulosic material at least one of a chemical agent and a biological during the pre-treatment step or the primary refining step, and
- outputting a refined and defibrated cellulosic material from the primary refining step.
1 more element
A mechanical pulping apparatus comprising:
- a pre-treatment defibration device receiving commutated cellulosic material;
- a primary refiner receiving the commutated cellulosic material discharged from the pre-treatment defibration device;
- a source of at least one of a biological agent and a chemical agent, and
- a conduit from the source coupled to at least one of the defibration device and the primary refiner, wherein the conduit delivers the at least one of the biological agent and the chemical agent to at least one of the defibration device and the primary refiner.
1 more element
A mechanical pulping apparatus comprising:
- a pre-treatment defibration device receiving commutated cellulosic material;
- a primary refiner receiving the commutated cellulosic material discharged from the pre-treatment defibration device;
- a source of a biological agent and a chemical agent, and
- a inlet to the pre-treatment defibration device for a biological agent;
- a primary refiner receiving the commutated cellulosic material discharged from the pre-treatment defibration device, and
- an inlet to the primary refiner for a chemical agent.
3 more elements
Dependencies are inferred from the claim text.