摘要:
Es wird bei der Anlage zur Aufbereitung von Altpapier durch den Anschluß der für eine mit Leichtschmutz angereicherte Fraktion vorgesehenen Abzugsleitung (18) des dem Primärstofflöser (1) nachgeschalteten Sekundärstofflösers (2) an ein neu entwickeltes Waschfilter (4) einfachen Aufbaues die dort abgezogene Suspension entstippt und weitgehend gereinigt. Man erhält hinter diesem Waschfilter (9) Gutstoff verhältnismäßig hoher Konsistenz, so daß in der Gutstoffsammelbütte bereits eine Konsistenz von 4 % erreicht ist. Durch die erfindungsgemäße Anlage können teuere Geräte eingespart werden und man erhält Gutstoff einerseits und Spuckstoff andererseits an einer zentralen Stelle. Ferner ist das System weitgehend geschlossen.
摘要:
The present method is directed to an on-site process for conveying an emulsion of one or more substantially water-free fluids or compositions to a brownstock washing process. This enables real-time adjustment of wash aids and other process aids thus improving the overall operation of brownstock washing.
摘要:
The problem of deck channel rewetting that occurs when a drainage chamber in a roll upwardly approaches a horizontal line extending past the horizontal diameter of the roll is solved by using a comb plate comprising at least one comb tooth engaging the perforated plate and extending through a deck channel to a drainage channel such that the at least one comb tooth has a slope configured to direct a slurry suspension from the perforated plate into the drainage channel.
摘要:
A method for drying nanofibrillated polysaccharide to obtain a substantially dry nanofibrillated polysaccharide product, comprising the following steps: (i) providing an aqueous suspension of nanofibrillated polysaccharide; (ii) increasing the solid content of said suspension, thereby forming a high solid content microfibrillated cellulose suspension; and (iii) drying said high solid content microfibrillated cellulose suspension, through a simultaneous heating and mixing operation.
摘要:
The invention is related to an apparatus for washing and/or dewatering pulp, the apparatus comprising two rotatable press rolls (202, 204) with a nip (238) between, each press roll (202, 204) including an axis (203, 205), a mantle element (206, 208) with permeable outer and inner surfaces, an axial inner drum (222, 224), and radial walls (226, 228, 230, 232) arranged between the mantle element (206, 208) and the axial inner drum (222, 224), so that axial filtrate channels (210, 212) are created between the mantle element (206, 208), the axial inner drum (222, 224) and the radial walls (226, 228, 230, 232), which filtrate channels (210, 212) are arranged to receive filtrate from the pulp. According to the invention, each press roll (202, 204) is arranged to rotate with a direction of rotation (R 1 , R 2 ), so that the pulp is arranged to be fed upwards through the nip (238); and in that at least one filtrate channel (210, 212) is provided with an oblique wall (241) between a radial wall (226, 228, 230, 232) and the mantle element (206, 208), which oblique wall (241) points in the same direction as the direction of rotation (R 1 , R 2 ) to prevent the flow of liquid from the filtrate channel (210, 212) to the outer surface of the mantle element (206, 208).