Apparatus in connection with a headbox of a paper machine or...

D - Textiles – Paper – 21 – F

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Details

D21F 1/02 (2006.01) D21F 1/06 (2006.01) D21F 1/08 (2006.01)

Patent

CA 2525346

The invention concerns an apparatus (10) in connection with the headbox of a paper machine or equivalent. According to the invention, the apparatus (10) comprises a body (11) and therein mixing chambers (13a1, 13a2, 13a3..), whereby dilution water (arrow L2) can be conducted through ducts (12a1, 12a2..) into each mixing chamber (13a1, 13a2..). In addition, there are at least two duct rows (14a1.1, 14a1.2~ 14a2.1, 14a2.2..), through which stock (m1) is conducted into each mixing chamber (13a1, 13a2..). Each mixing chamber (13a1, 13a2..) is limited by vertical walls (T1), a bottom wall (T2) and a covering wall wall (T3) and by a partition wall (16a1, 16a2..) separating one mixing chamber (13a1, 13a2..) from the other. The ducts (14a1.1, 14a1.2..) on the inlet side of the mixing chamber extend into the mixing chamber (13a1, 13a2..) at a distance (h1) from the ducts (15a1.1, 15a1.2.., 15a2.1, 15a2.2..) on the outlet side of the mixing chamber (13a1, 13a2..), whereby an annular gap (D1) is left between the aligned duct (14a1.1, 14a1.2~ 14a2.1, 14a2.2..) on the inlet side and the duct (15a1.1, 15a1.2.., 15a2.1, 15a2.2..) on the outlet side, and that each mixing chamber (13a1, 13a2..) is filled by dilution water and the dilution water is conducted through the annular gap (D1) to join the stock (m1).

L'invention concerne un appareil (10) connecté à la caisse d'arrivée d'une machine à papier ou analogue. Selon l'invention, l'appareil (10) comprend un corps (11) qui contient des chambres de mélange (13a¿1?, 13a¿2?, 13a¿3? ) de sorte que l'eau de dilution (flèche L¿2?) peut être amenée par des canalisations (12a¿1?, 12a¿2? ) dans chaque chambre de mélange (13a¿1?, 13a¿2? ). L'appareil (10) comprend également au moins deux rangées de canalisations (14a¿1.1?, 14a¿1.2? 14a¿2.1?, 14a¿2.2? ) par lesquelles une pâte (m¿1?) est amenée dans chaque chambre de mélange (13a¿1?, 13a¿2? ). Chaque chambre de mélange (13a¿1?, 13a¿2? ) est délimitée par des parois verticales (T¿1?), une paroi inférieure (T¿2?), une paroi de couverture (T¿3?) et une paroi de séparation (16a¿1?, 16a¿2? ) séparant les chambres de mélange (13a¿1?, 13a¿2? ) entre elles. Les canalisations (14a¿1.1?, 14a¿1.2? ) situées du côté de l'orifice d'entrée de la chambre de mélange pénètrent dans la chambre de mélange (13a¿1?, 13a¿2? ) jusqu'à une distance (h¿1?) des canalisations (15a¿1.1?, 15a¿1.2? 15a¿2.1?, 15a¿2.2? ) du côté de l'orifice de sortie de la chambre de mélange (13a¿1?, 13a¿2? ) de sorte qu'un espace annulaire (D¿1?) est formé entre la canalisation alignée (14a¿1.1?, 14a¿1.2? 14a¿2.1?, 14a¿2.2? ) située du côté de l'orifice d'entrée et la canalisation (15a¿1.1?, 15a¿1.2? 15a¿2.1?, 15a¿2.2? ) située sur le côté de l'orifice de sortie, chaque chambre de mélange (13a¿1?, 13a¿2? ) est remplie d'eau de dilution et l'eau de dilution est amenée par l'espace annulaire (D¿1?) de façon qu'elle rejoigne la pâte (m¿1?).

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