Patent ID: 8157967

Claim:
An arrangement in a screening apparatus of a pulp or paper processing system, the arrangement comprising: a screening vessel including a vessel sidewall and an inner cylindrical screen; an inlet to a pulp chamber in the screening vessel to receive pulp or paper, the pulp chamber being between the vessel sidewall and the cylindrical screen; a first rejects discharge outlet coupled to an upper elevation of the screening vessel, the rejects discharge outlet is in fluid communication with the pulp chamber; a second rejects discharge outlet in fluid communication with the pulp chamber and coupled to a reject removal conduit for removal of heavy rejects formed in a screening process, wherein, between the reject removal conduit and the pulp chamber, a material circulation passage extends from the reject removal conduit to the vessel sidewall via a conduit external to the screening vessel, wherein the circulation passage connects to the vessel sidewall below the upper elevation of the screening vessel, and further wherein a portion of the reject is removed from the screening apparatus through the reject removal conduit while simultaneously another portion of the reject flows from the removal conduit through the conduit external to the screening apparatus and into the interior of the screening apparatus.