Abstract

A device for positioning a drain pipe (6) of a draining system in a drying cylinder (1) the jacket (2) of which has inner circumferential grooves (3) for condensate which is formed as a result of heat transfer, said draining system comprising an outlet means and a plurality of drain pipes which are connected to the outlet means, wherein the draining system removes the condensate from the grooves via the drain pipes and the outlet means, wherein the device has a pipe positioner (40) which is disposed within an end portion (9) of the drain pipe located closest to the jacket, said pipe positioner comprising a supporting body (41) resting on the top surfaces (30) of two adjacent ridges (5), and a locking device (54) for fixing the drain pipe to the pipe positioner (40), which has a first through hole (48) for receiving the drain pipe (6), and a second hole (49) for receiving the locking device, said second hole opening into the first hole. According to the invention, the first hole (48) is disposed in the supporting body, wherein the portion (51) of the locking device that is located in the supporting body is provided with a third through hole (52), interacting with and being aligned with the first hole of the supporting body, so that the drain pipe extends through both the supporting body and the locking device, wherein the locking device encloses the drain pipe (6) and is brought to a locked position in interaction with supporting body (41).

IPC Classes  ?

• D21F 5/10 - Removing condensate from the interior of the cylinders

Abstract

A device for positioning a drain pipe (6) of a draining system in a drying cylinder (1), the jacket (2) of which has inner circumferential grooves (3) for condensate which is formed as a result of heat transfer, said draining system comprising an outlet means and a plurality of drain pipes which are connected to the outlet means, wherein the draining system removes the condensate from the grooves via the drain pipes and the outlet means, wherein the device has a pipe positioner (14) which is disposed in an end portion (12) of the drain pipe located closest to the outlet means, said pipe positioner comprising a mounting device (15) for mounting the drain pipe onto the outlet means, and a lockable connection (16) that connects the drain pipe to the mounting device (15).According to the invention, the lockable connection is a joint connection, which defines a fulcrum for pivoting of the drainpipe in a plane to enable positioning of the drain pipe relative to the bottom surface of the groove.

IPC Classes  ?

• D21F 5/10 - Removing condensate from the interior of the cylinders

Abstract

The invention relates to a unit (3) for deaeration of drainage water from a paper machine, said unit comprising an inlet (8) for receiving the drainage water in a first flow direction, an outlet (39) for removing the drainage water to a subsequent deaeration channel, and a first chamber (5) that is arranged downstream of the inlet, said first chamber comprising a first chamber part (18), which comprises a guide wall portion (37) for redirecting the drainage water in a second flow direction that differs from the first flow direction, said guide wall portion being formed by a plurality of curved guide walls (10, 23) which interact with the drainage water so that the drainage water is decelerated and air is forced out of the drainage water, and two end walls (25, 26) which are arranged on respective sides of the guide walls, wherein each end wall of at least one of the flow channels exhibits an opening (27) that communicates with the flow channel for removing air that has been released from the drainage water in the flow channel. The invention also relates to a method for such a deaeration.

IPC Classes  ?

• D21F 1/66 - Pulp catching, de-watering, or recoveringRe-use of pulp-water
• B01D 19/00 - Degasification of liquids
• C02F 1/20 - Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
• C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry

Abstract

A tissue papermaking machine is described, comprising a wet section (2) and a press section (3) comprising a single press (11) with first and second press elements (12, 13) forming a press nip (N1), and with a press felt (17) running through the press nip in contact with the formed fibre web (1'), whereby the second press element is arranged inside the loop of the press felt, and a smooth belt (14) runs through the press nip in contact with the formed fibre web, whereby the first press element is arranged inside the loop of the belt, and a transfer roll (16) arranged inside the loop of the belt forming a transfer nip (N2) with a drying surface (20), whereby the smooth belt carries the fibre web between the press nip and the transfer nip. Furthermore, the machine has a dry section (4) for final drying of the fibre web (1"). According to the invention, a pre-dewatering device (25) is arranged upstream of the press to dewater the fibre web to a dry content of 15-30%, before the fibre web runs into the press nip, and the press felt and the smooth belt, which is impermeable to water, are arranged to be separate from each other immediately after the exit of the press nip and define there between an angle α, which is at least 5°, to prevent rewetting of the fibre web. The invention also relates to a method of manufacturing a tissue paper web therein and a method of lowering the energy requirement therein.

IPC Classes  ?

• D21F 1/66 - Pulp catching, de-watering, or recoveringRe-use of pulp-water
• D21F 3/02 - Wet presses

Abstract

The present invention relates to a structural element (17A, 17B, 17C) for a functional member (11) in a headbox of a web-manufacturing machine, the structural element comprising an integral block (1) comprising therein a plurality of channels (2) defining flow channels for a paper stock, said stock flow channels extending through the integral block from a first upstream end (1A) to a second downstream end (1B) of the block. According to the invention, the structural element comprises at least one gap-forming element (13) which is arranged to ensure a gap (14) of a predetermined width between the block of the structural element and a neighbouring element.

IPC Classes  ?

• D21F 1/02 - Head boxes of Fourdrinier machines

Abstract

An apparatus for transferring a wet paper web from a press nip to a drying cylinder (52) of a papermaking machine, and for structuring the web, comprises an impermeable transfer belt (35) having a web-contacting surface, the wet paper web passing through the press nip enclosed between a press felt (33) and the transfer belt, and a permeable structuring fabric (37) for transfer of the web onto the drying cylinder, the structuring fabric having a structured surface and being arranged in a loop within which a suction transfer device (38) is disposed, said suction transfer device having a suction zone (41). According to the invention the web-contacting surface of the belt has a non-uniform distribution of microscopic-scale depressions, and that the suction zone includes a transfer point (40) spaced a distance D from the press nip along which the belt runs, the belt being arranged to bring the web into contact with the structuring fabric in the suction zone for a length L, such that suction is exerted on the paper web to transfer the paper web from the belt onto the structuring fabric. at the transfer point.

IPC Classes  ?

• D21F 3/04 - Arrangements thereof
• D21F 3/02 - Wet presses
• D21F 7/08 - Felts

Abstract

The invention discloses a pre-assembled self-supporting unit (1) for a twine wire forming section. The unit comprises an integrated save-all tray (25) and other integrated elements such as cross walkway (17) , piping beam (10) , connecting arms (8) . The rolls (2) for supporting at least one forming clothing loop (4) and the other elements are mounted onto this separate unit instead of being mounted onto the same machine frame. The unit provides a diminished foot print for the forming section, and it is dimensioned to fit in a standard transport container.

IPC Classes  ?

• D21F 7/00 - Other details of machines for making continuous webs of paper
• D21F 1/00 - Wet end of machines for making continuous webs of paper
• D21F 1/48 - Suction apparatus

Abstract

A support body (7) for an apparatus having an extended nip (N) formed between the support body and a counter-pressure member, having a working surface (13), being elastically deformable, and comprising a plurality of pressure chambers (94, 96, 98) pressurized for controlled expanding in the direction of the working surface in order to load the nip (N). According to the invention the support body comprises a plurality of reinforcing profiles (100, 106, 108) disposed in at least one chamber of the pressure chambers, the interiors of the profiles being in fluid communication with one another via holes (102), a wall of the profile facing said working surface including holes (104, 107, 109) for communicating fluid between the interior of the profile and the chamber in which said profile is located, said profiles providing an inner support to walls defining said at least one chamber. The invention also refers to a support body assembly for an apparatus having an extended nip, comprising said support body and a holding device (8) for the support body, providing an outer support to all sides of the support body having said chambers except the side of the working surface. The invention also relates to an apparatus for the treatment of a fibre web, comprising said support body assembly. Methods of forming an extended nip and controlling the load in an extended nip in said apparatus are also disclosed.

IPC Classes  ?

• D21F 3/02 - Wet presses

Abstract

The inventive idea is to make the rotating elements or rolls in a tissue papermaking machine with a reduced weight comparing to the conventional rolls made of steel. In this manner the rolls create less vibrations and allow sufficiently increase of the operation speed and productivity of the entire machine, or reduce the machine dimension for a given operation speed comparing to the conventional solutions. The invention is applicable to rebuilds of the existing machines and for new high-speed installations.

IPC Classes  ?

• D21F 1/40 - Rolls
• D21F 3/08 - Pressure rolls
• D21G 1/02 - RollsTheir bearings