Pulper

摘要

A pulper for comminuting and suspending fibrous material includes a container and at least one rotor arranged in the container for circulating a fibrous material suspension located on the container and at least one rigid sieve. The rotor at least predominantly passes over the sieve surface which is provided with round sieve openings. As high a throughput as possible and as low an energy consumption as possible are to be achieved by limiting the cross-section of the sieve openings exclusively defined by circle segments.

主权项

1. A pulper for comminuting and suspending a fibrous material, the pulper comprising:
a vat; at least one rigid screen with a screen surface having a plurality of screen openings, each of said screen openings defined by at least one first arc having a first radius and at least one second arc having a second radius, said first radius being greater than said second radius, said at least one first arc tangentially adjoining said at least one second arc, thereby defining a bounded curve, each of said plurality of screen openings being rotated in its orientation relative to each adjacent screen opening; and at least one rotor arranged in said vat for circulating a fibrous stock suspension, said rotor passing over at least a greatest portion of the screen surface of said at least one rigid screen.