Valmet Technologies, Inc.

The invention relates to a method for forming a multi-ply fiber web (W) in a forming section (100), in which at least part of the forming is done in a twin-wire forming part formed between a first wire (10) for a first layer of the multi-ply fiber web and a second wire (20) for a second layer of the multi-ply fiber web, in which the layers for the multi-ply fiber web are joined in the twin-wire part at a joining location, in which twin-wire forming part water is removed from the joined layers of the multi-ply fiber web by a variable-curvature roll (50). In the method the layers of the multi-ply fiber web are joined at a curved surface stabilization element (32) by a nip between the curved surface stabilization element (32) and the first and second wire (10; 20) at the joining location. The invention also relates to a forming section (100) for forming a multi-ply fiber web (W) comprising at least one twin-wire forming part formed between a first wire (10) for a first layer of the multi-ply fiber web and a second wire (20) for a second layer of the multi-ply fiber web, which twin-wire part comprises a joining location, in which the layers for the multi-ply fiber web are joined, which twin-wire forming part comprises a variable-curvature roll (50). In beginning of the twin-wire part of the forming unit (110) a curved surface stabilization element (32) is located, that at the joining location between the curved surface stabilization element (32) and the first and second wire (10; 20) a nip is formed to join the layers of the multi-ply fiber web are joined.

The invention relates to a method of a set change in a slitter-winder, in which method a set change is performed in a winder (10) of the slitter-winder by a set change system (10), which winder (10) is a two-drum winder and comprises two winding drums (11, 12), of which winding drums (11, 12) at least one is movable to adjust distance between the winding drums (11, 12), and a rider roll unit (20), in which winder customer rolls (15) are wound on support of the winding drums (11, 12) of partial webs of a slitted fiber web, which set change system (40) comprises an adhesive application device (23), a cutting device (22), roll pusher (21) and a core placer (24), which method is performed to remove a set of complete customer rolls (15) from the winder and to provide new cores for winding next set of customer rolls (15), in which method the adhesive application device (23) applies adhesive on partial webs running towards the customer rolls (15) and when the adhesive has reached surface of the customer rolls (15), the partial webs are cut by the cutting device (22), set of the completed customer rolls (15) are removed by the roll pusher (21) and new cores are set on support of the winding drums (11, 12) by the core placer to begin winding of next set of the customer rolls (15), wherein when the set of the complete customer rolls (15) have been removed, the winding drums (11, 12) are moved back towards their position for beginning of the winding and the new cores (14) are set by the core placer (24) on support of the winding drums (11, 12) from above simultaneously, when the roll pusher (21) reaches its turning point between its pushing movement and its return movement back to its rest position. In the method simultaneously with the movement of the roll pusher (21) back to its rest position the rider roll unit (20) is moved downwards towards its position at beginning of the winding of the next set of customer rolls (15) The invention also relates to a slitter-winder comprising a set change system (40).

The invention relates to an arrangement for a pulper for fibers. The pulper (10) has a rotor (13) and the arrangement includes a set having at least one counter piece (18) to be arranged in connection to the rotor (13). The counter piece (18) has several slots (24) at the surface facing the rotor (13). In addition, one or more slots (24) has one or more sharp edges (25). Also, the counter piece (18) has several through holes (23). Further, there is a clearance between the counter piece (18) and the rotor (13), and the clearance is 0,1 - 2 mm, preferably 0,5 - 1 mm. The invention also relates to a pulper for fibers.

The invention relates to a winder with a diameter profile measuring system, which winder (10) is a winder (10) of a slitter-winder and configured to wind customer rolls (15) as sets of customer rolls (15), which winder (10) comprises two winding drums (11, 12), on support of which the customer rolls (15) are configured to be wound, and a rider roll (17) supported by a rider roll beam (18), which rider roll (17) is configured to support the customer rolls (15) during winding thereof from above, and which rider roll (17) and rider roll beam (18) are arranged to be movable in vertical direction. The rider roll beam (18) comprises a linear guide located on its longitudinal side, the diameter profile measuring system comprises a diameter profile measuring device (20) supported by a carriage (22), the measuring device (20) is movably supported by the carriage (22) on the linear guide (21), the diameter profile measuring device (20) comprises a measuring laser sensor and the measuring laser sensor is turnably by a turnable attachment arrangement attached to the carriage (22) for calibration measurement of the measuring laser sensor. The invention also relates to a diameter profile measuring method for measurement of diameter profile of a set of customer rolls wound in a winder of a slitter-winder.

The invention relates to a system for pyrolyzing pyrolyzable material (PM) to produce pyrolytic vapours (PV). The system comprises a pyrolysis reactor (100) for pyrolyzing pyrolyzable material (PM), a first particle separator (200) for separating the pyrolytic vapours (PV) and a first solid material fraction (SF1) from a pyrolysis product feed, and a particulate material heater (300) for heating the first solid material fraction. The particulate material heater (300) comprises second distributors (320) for feeding second fluidizing gas (Gas2) into the particulate material heater (300) to fluidize particulate material within the particulate material heater (300) and an electric heater (310) configured to electrically heat particulate material arranged in the particulate material heater (300). The invention relates also to a method for pyrolyzing pyrolyzable material (PM) to produce pyrolytic vapours (PV). The method comprises at a first period, heating the particulate material arranged in the particulate material heater (300) using an electrical heater (310), guiding heated particulate material from the particulate material heater (300) into the pyrolysis reactor (100).

A method for manufacturing micro fibrillated cellulose from a cellulosic raw material comprises treating the cellulosic raw material by a steam explosion at a temperature of 170°C to 215°C and thereafter refining the treated cellulosic raw material.

In the presented solution the boiler (1) comprises a furnace (2). The furnace (2) comprises at least two side walls (4), at least two end walls (3), a roof (5), and a bottom (6). A distance between the at least two side walls (4) defines a width (W) of the furnace, a distance between the at least two end walls (3) defines a depth (D) of the furnace, and a direction between the at least two end (3) walls is a depth direction (Dd). The arrangement further comprises at least one beam (7) extending in the depth direction (Dd). The beam (7) is positioned under the bottom (6) for supporting the bottom, and the beam (7) is also positioned between the at least two side walls (4) at a distance from each side wall (4). The ends of the beam (7) extend under the vertical portions (3a) of the at least two end walls (3). The arrangement also comprises at least one rod (8) between each end of the beam (7) and the corresponding vertical portion (3a) of the side wall. The rods (8) are substantially vertical, and the rods (8) are attached to the end of the at least one beam (7) and to the corresponding vertical portion (3a) of the side wall. Thereby the rods (8) are arranged to transfer load from the beam (7) to the vertical portions (3a) of the end walls.

The invention relates to an adhesive application device (50) for a turn-up system of a reeler of a fiber web production line, which comprises a melter (40) and an adhesive applicator (20), which adhesive applicator (20) comprises nozzles (31), in which adhesive application device (50) the melter (40) is connected to the adhesive applicator (20) via a feed channel (42) for providing adhesive to the nozzles (31) of the adhesive applicator (20). The melter (40) is a hotmelt adhesive melter (40). The adhesive applicator (20) is a high pressure hotmelt adhesive applicator (20) comprising an applicator head (21), a high-pressure pump unit (22), a linear actuator (23) and a linear actuator mover (24), and the high-pressure pump unit (22) is driven by the linear actuator (23) and the linear actuator mover (24).

A fabric edge support device (2) for use in connection with an edge (100) of a forming fabric (10) of a fiber web machine (1) fourdrinier section, the fabric edge support device (2) comprising- a bar (20), which comprises a cross sectionally a curved surface to provide an edge support surface (201) extending in a machine direction (MD) for the forming fabric (10), the bar (20) is provided to be set at a distance downstream from a headbox (12) to bend the forming fabric edge (100) upwards to prevent fiber stock (FS) to flow over the edge (100) of the forming fabric (10) when installed,- a water channel (21) arranged in operational connection with the edge support surface (201) so as to provide water (W) stream on the edge support surface (201) when in use,- a holder (22) for supporting the bar (20) and setting the position of the bar (20), the holder (22) comprising attachment means (224) for attaching the fabric edge support device (2) to a fiber web machine (1),- the fabric edge support device (2) comprises a fabric guide (23) to support the forming fabric (10) during a fabric change.

A measurement system for monitoring a gap adjustment mechanism of a processing device. The processing device comprises oppositely positioned processing elements with a gap between them. The measurement system comprises a first measuring device to measure information describing a position of that processing element which is moved by at least one actuating unit of the gap adjustment mechanism for adjusting the size of the gap, and at least one second measuring device to measure information describing a position of the at least one actuating unit. The measurement system further comprises a data processing device configurable to determine the condition of the gap adjustment mechanism based on the information describing the position of the processing element and the information describing the position of the at least one actuating unit. Additionally, a method for monitoring a condition of a gap adjustment mechanism of a processing device.