PROCESSING OF RECYCLED MATERIAL

• Main Author: HAUTALA, Jouko
• Format: Patent
• Language: English; French; German
• Published: 18.11.2020
• Subjects: FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT; PAPER-MAKING; PRODUCTION OF CELLULOSE; TEXTILES; TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE

An apparatus and a method for processing recycled material, comprising a first pulper (3) having an inlet (2) for receiving recycled material (1), a water inlet (26) for producing a mixture of water and particles of recycled material, a first rotor unit (R1) configured to slush recycled material and a first screen plate (18) connected to a first outlet (20) configured to extract a first portion of recycled material from the first pulper (3); a last pulper (8) having a reject washer configured to remove coarse rejected recycled material from the last pulper (8); and an upper channel (4) from the first pulper (3) to the last pulper (8), wherein the mixture of water and particles of recycled material is configured to flow over from the first pulper (3) to the last pulper (8). The apparatus comprises a of the last pulper (8) being lower than or at the same level as the first pulper (3); a lower channel (40) at the bottom of the first pulper (3) extending to the last pulper (8); and a gate (45) at the lower channel (40), configured to cause, when open, the mixture of water and particles of recycled material to flush to the last pulper (8).