CN102472008A

CN102472008A - Apparatus for screening fibre suspensions

Info

Publication number: CN102472008A
Application number: CN2010800306089A
Authority: CN
Inventors: 里斯托·利奥科伊
Original assignee: Andritz Oy
Current assignee: Andritz Oy
Priority date: 2009-07-07
Filing date: 2010-06-10
Publication date: 2012-05-23
Also published as: WO2011004060A1; EP2452012B1; EP2452012A4; JP2012532999A; FI20095769A; EP2452012A1; FI20095769A0; BRPI1014007A2; RU2012104023A

Abstract

The present invention relates to a screen for fiber suspension, especially for removing coarse particles, said screen comprising a casing (1), conduits (2, 3, 4) connected thereto for fiber suspension to be fed into the apparatus and for reject and accept being discharged, a drum (5) arranged inside the housing and rotating with respect to its vertical axis, the screening surface of said drum being provided with apertures (21) through which the accept fraction flows. The feed and outlet conduits are arranged so that the fiber suspension is fed into a space (8) between the casing and the screen drum and the accept is discharged from the interior of the screen drum. The apertures in the screening surface are slots, the longitudinal direction of which with respect to the direction of rotation (24) of the drum being between -40 degrees and + 40 degrees and the ratio of the length and the width being 1.05-10. The slots form rows (11) of slots and the outer side of the screening surface is profiled such that ridges (22) are provided between the rows of slots.

Description

The equipment that is used for screen fibre suspension

Technical field

The present invention relates to be used for equipment, in particular for the crude particle, such as knaur (knots), stone with from the coarse sizing of other solid particles of fibrous suspension at chemical sizwe and paper industry screen fibre and homologue.The present invention relates to have the equipment of the sieve cylinder of rotation.

Background technology

In the processing of wood pulp separator, use sieve that acceptable fiber in the suspension and the separating substances of not expecting are opened.Typical sieve structure has the pipeline of sending to that is used for fibrous suspension, and wherein suspension can produce in the decomposition of wood chip or at the defibrator that is used for the secondary pulp fiber.Suspension can comprise knaur, fragment (slivers), bark particle, dust, metallic particles and other materials of not expecting.

In the enclosure interior of sieve, fibrous suspension is mobile cylindrical screen (often being called plate or basket) near, and acceptable thus pars fibrosa (qualified thing) passes sieve plate, does not leave and conform on first side that investigate things is retained in sieve plate and via the investigate things opening that do not conform in the housing.When cylindrical sieve plate, promptly sieve cylinder when rotation, it is through pulsation or turbulent flow element, is used to strengthen the flowing of fibrous suspension on the surface through sieve plate, and has therefore also strengthened screening.Sieve plate has hole (hole or slit), and said hole has the size that is suitable for screening process.The size in the hole of sieve plate must be suitable, makes when received fiber passes the screening surface, to prevent that the material of not expecting from passing.

The EP patent announces that 275967 (FI76139) provide the method and apparatus that is used to separate knaur, has wherein realized lower MC consistency level (6-8%) approx.Through sieving the rotary speed of cylinder and the increase that slurry feed rate relative to each other realizes useful consistency range to profile sizing and the design correctly of screening the surface and through optimization.In the equipment according to said announcement, the direction of rotation of cylinder is identical with the feeding direction of slurry, and it is identical with the direction of rotation of cylinder not conform to investigate things discharge direction.And the profile of structure sieve cylinder makes ridge is set between sieve aperture on the outer surface of cylinder, and this ridge is included in the posture front surface that tilt rise and the back surface that be substantially perpendicular to outer surface of outer surface to tilt from cylinder.Ridge about the angle of inclination of the axis of cylinder-45 and+45 degree between.Hole on the cylinder can be hole or slit, but the screening surface of common this sieve is provided with round hole, and its diameter depends on application aims and can in the scope of 5-15mm, change.

EP 1357222 (US2004004032) has described a kind of dusting cover that is used for fibrous suspension, and it has fixing sieve cylinder, and scrape board member and in the sieve cylinder, rotate, thus cleaning screening surface.The screening surface is provided with elongated orifices, and this elongated orifices has width and the length between 2 and 20 of 1-8mm and the ratio of width.The purpose of this announcement is the long stapled ratio that increases in qualified thing.And United States Patent (USP) 490417 provides the sieve with fixing sieve cylinder.Slit in the screening surface is parallel, but can tilt about the axis of cylinder.

Summary of the invention

The purpose of this invention is to provide a kind of rotary screen cylinder that is used for scalping, can realize high denseness (consistency) (even surpass 6%) by means of this sieve cylinder, and with than before more the mode of Energy Efficient realize.

The present invention relates to be used for screen fibre suspension, especially scalping, to remove the coarse grained equipment such as knaur, this equipment comprises: housing; Be used for sending pipeline to and being used to not conform to the outlet conduit of investigate things and qualified thing of fibrous suspension; Cylinder; Said cylinder is arranged in the housing and about vertical axes and rotates; The screening surface of this cylinder is provided with the hole, and qualified thing partly flows through this hole, and that arranges said equipment sends pipeline and outlet conduit to; Make fibrous suspension be sent in the space between housing and the sieve cylinder, and make qualified thing discharge from the inside of sieve cylinder.According to the present invention; Hole in the screening surface is a slit; The longitudinal direction of slit about the direction of rotation of cylinder become-40 degree and+angle between 40 degree and the length of slit are 1.05-10 with the ratio of width; And said slit forms the slit of several rows, and the profile in the outside on structure screening surface, makes ridge is set between slit is capable.

According to preferred embodiment, the longitudinal direction/longitudinal axis in hole with respect to the direction of rotation of cylinder-30 and+30 degree between, preferably-15 degree and+15 degree between.According to preferred embodiment, the longitudinal extension direction in hole is substantially the same with the direction of rotation of cylinder, promptly perpendicular to the longitudinal axis that sieves cylinder.

Slit be rectangle or oval in shape.The edge of slit ends be rectangle or sphering.Typical slit is elongated.Width is generally 4-12mm.The length of slit is 1.05-10 with the ratio of width, is preferably 2-8.

Slit is arranged to above another, form the slit in several rows/zone at one of the axis direction of cylinder thus, and they are located on the circumferential direction of cylinder at a distance from each other.Typically, the slit of perpendicular row is in inclination attitude.

According to preferred embodiment, the profile in the outside on the screening surface of structure cylinder makes ridge be disposed between the row/zone of slit.Outer surface refers to that fibrous suspension is advanced to that side of cylinder, and qualified thing part passes the hole and flow to another surface from this side, and does not conform to investigate things and partly be retained on this side.Preferably arrange the profile ridge, make the profile ridge with respect to the vertical axis of cylinder become-5 and+angle between 20 degree, typically be 15 degree.The slit of perpendicular row can change with respect to the line of the vertical axis of cylinder, makes the end of slit form the line that is arranged essentially parallel to ridge, that is, typically the longitudinal axis with respect to cylinder is in inclination attitude.

Profile is formed by ridge, and said ridge has with respect to the angled front surface in the plane on screening surface and surface, back and the surface on the plane that is arranged essentially parallel to plate between front surface and surface, back possibly.By means of the angle of inclination of ridge, with respect to the lift angle of the front surface of the rotary speed of the incline direction of direction of rotation, cylinder and ridge; Make the circulation timei and the turbulent flow of optimization slurry become possibility, the final result of this and separator (qualified thing/do not conform to investigate things) is proportional.When the front surface of the profile ridge that receives fluid recedes, promptly tilt to rise and surface, back when being vertical from the screening surface plane when the profile ridge, realize passing hole evenly mobile on screening surface.This eliminates the suspension erratic flow in the opposite direction that occurs in some cases.According to an embodiment, the front surface of profile ridge also can be perpendicular to the plane on screening surface, and the surface, back is to tilt to descend thus.In this situation, front surface antagonism fluid and mixed flow animal increase the fluid that passes the screening surface thus, because of increasing the capacity of this equipment, still reduce separating power simultaneously.The front surface of profile ridge also can tilt with the surface, back symmetrically.

According to a preferred embodiment of the invention, the profile ridge also is disposed in the slot area, makes ridge be set between the slit, and said slit is positioned to one and is positioned at another top.Thereby in this situation, profile forms by ridge is capable, and said ridge is broken off by slit.Slot area can be provided with profile one or more so that form, and said profile phase is identical with the angle of inclination that the row/zone and the profile between the row/zone of slit of slit form for the angle of inclination of the vertical axis formation of cylinder.In other words, ridge is capable parallel with slit.

According to embodiment; Arrange the slit in the perpendicular slit of going in the horizontal direction; Slit in the feasible slit in every line is positioned on the identical horizontal line, promptly be positioned on first group of horizontal line, and the slit in the slit in every line correspondingly is positioned on second group of horizontal line.

According to a preferred embodiment of the invention, along the axis of cylinder, the lengthwise position/angle that is arranged in the slit of delegation's slit changes with respect to the direction of rotation of cylinder from the top down.The longitudinal direction of uppermost slit is parallel with the direction of rotation of cylinder.Simultaneously, the longitudinal direction of following slit begins downward-sloping on the direction of rotation of cylinder from the front end of slit, and the front end of (in the direction of rotation of cylinder) slit is located highlyer than the tail end of this slit thus.Typically, following slit is more more downward-sloping than top slit.The big 1-5 degree in angle of inclination of following slit, usually big 2-4 degree.According to another embodiment; The longitudinal direction of uppermost slit also is parallel to the direction of rotation of cylinder; And the slit below ensuing is inclined upwardly with respect to direction of rotation, and the front end of said slit is located lowlyer than the tail end of this slit on the direction of rotation of cylinder thus.Therefore, the slit below Next is bigger than the top slit degree that is inclined upwardly at the tail end place.The big 1-5 degree in angle of inclination of following slit, usually big 2-4 degree.In these embodiment, two slits of above another, locating can be substantially parallel, and still relevant is that the most of slit in delegation's slit is relative to each other with different location, angle of inclination.

According to a preferred embodiment of the invention; Along cylinder axis; The longitudinal direction of the slit in delegation's slit changes with respect to the position/angles of the direction of rotation of cylinder from bottom to top; Make the longitudinal direction of nethermost slit be parallel to the direction of rotation of cylinder, tilt with respect to direction of rotation and be positioned at top slit.Thereby the slit above next can be inclined upwardly, and thus on the direction of rotation of cylinder, the front end of this slit is located to such an extent that be lower than the tail end of this slit.Usually, top slit tilts manyly than following slit.The big 1-5 degree in angle of inclination of top slit, usually big 2-4 degree.According to a preferred embodiment of the invention, top slit can correspondingly tilt, and makes on the direction of rotation of cylinder, and the front end of this slit is located to such an extent that be higher than the tail end of this slit.In this situation, slit is downward-sloping with respect to direction of rotation.In these embodiment, two (for example two nethermost) slits that are positioned another top can be parallel basically, but relevant be that the most of slit in delegation's slit is relative to each other with different location, angle of inclination.

In inclination is in the foregoing description that points to downwards, and increase of the capacity of equipment and denseness are higher.When inclination is when being directed upwards towards, the separating power of equipment increases, and can obtain clean more qualified thing.

According to an embodiment of the invention equipment allow with than before more effective mode and with higher denseness (even surpassing 6%) from fibrous suspension crude particle, such as knaur and homologue.Because elongated slot can increase the speed of sieving cylinder, because " projection (projection) " of slit keeps enough big.Bigger speed allows higher denseness.If the screening surface is provided with circular port, then speed limit is satisfied earlier, and this is because increase with speed, because the projection in hole reduces, thereby hole plug must be fast more.In the equipment according to the embodiment of the invention, typically because the rotary speed that reduces or the capacity of increase, screening is an Energy Efficient more.

Description of drawings

To be described in greater detail with reference to the attached drawings the present invention that example only is provided at present, in the accompanying drawings:

Fig. 1 goes out according to equipment of the present invention as schematic side illustration,

Fig. 2 illustrates the screening surface according to embodiment as vertical view,

Fig. 3 a and 3b illustrate the screening surface according to another embodiment as vertical view,

Fig. 4 illustrates the screening surface according to embodiment as vertical view,

Fig. 5 illustrates the screening surface profile according to embodiment as aligning and cutaway view, and

Fig. 6 a, b, c and d illustrate the screening surface according to some embodiment as vertical view.

The specific embodiment

Fig. 1 illustrates sieve according to the preferred embodiment of the invention; This sieve comprises columniform basically shell 1, sieve cylinder 5 and the one or more fixedly scraper plates 6 in sieve cylinder 5; Fibrous suspension inlet duct 2, qualified thing outlet conduit 3 and do not conform to investigate things outlet conduit 4 and be connected to this shell 1, said one or more fixedly scraper plates 6 extend at the near surface of sieve cylinder.The sieve cylinder 5 of rotation is attached to axle 7 by known mode own, and axle 7 is for example through the operation of belt driver (not shown).Space 8 between sieve cylinder 5 and shell 1 is annular.Above-mentioned

pipeline

2 and 4 is connected to the shell 1 of annular space.Fibrous suspension is advanced in the space 8, and the qualified thing that passes through the screening surface that flows is discharged from the inside of sieve cylinder.Scraper plate 6 is attached to fixed frame 10 by means of arm 9, and fixed frame 10 also forms the support member of axle 7 via bearing.Scraper plate 6 is positioned at cylinder 5.Here, said scraper plate produces suitable, positive and negative pulsation on cylinder 5, thereby the screening of cleaning roller surface.

Fig. 2 illustrates the screening surface profile according to the aligning of preferred embodiment.Profile plate 20 is formed by the profile 22 between hole 21 and the profile plate 20.As scheme finding, according to the present invention, hole 21 is a slit.The form of slit is a rectangle, thus the end edge of slit can be rectangle or sphering.Depend on application aims, the length L of slit and the ratio of width W are 1.05-10, are preferably 2-8.Width W is generally 4-12mm.In this embodiment, the longitudinal direction 23 of slit 21 is parallel to the direction of rotation 24 of cylinder 5.

On the axial direction of cylinder, a slit is disposed in another slit top, and the row of slit/zone 11 each interval certain distance on the circumferential direction of cylinder forms thus.The perpendicular row of slit and profile ridge 22 do not align with the vertical axis of cylinder, but their row for tilting.The row of slit and ridge with respect to 7 one-tenth-5 of the vertical axes of cylinder and+angle between 20 degree, be generally the angle beta of 15 degree.

Can arrange the slit in the slit that erects row 11 in the horizontal direction, make slit form parallel horizontal line.Fig. 2 illustrates optional embodiment, and wherein the slit 21 in the slit of perpendicular row 11 is arranged in the horizontal direction, and the slit in the feasible slit in every line is positioned on the par line.Thereby; Arrange the slit in the perpendicular slit of going in the horizontal direction; Make every slit in the slit of a perpendicular row 11 be positioned on the par line, promptly be positioned on first group of horizontal line 12a, and the slit in the slit in every line correspondingly is positioned on second group of horizontal line 12b.

In Fig. 3, the longitudinal direction/longitudinal axis 23 of slit 21 is with respect to the direction of rotation 24 angled α of cylinder, this angle-40 degree and+40 degree between.In Fig. 3 a, this angle [alpha] is roughly+25 degree, and in Fig. 3 b, this angle is roughly-24 degree.

Fig. 4 illustrates the profile of the outer surface of plate 20.The screening surface can be considered to formed by the plate that has ridge 22 and the planar section between ridge 22 26, and said plate is provided with machined hole 21.In the embodiment of Fig. 4, the profile ridge is set in the zone of slit extraly, make ridge 25 be arranged between the slit on another.Therefore, in this situation, profile is formed by the row of ridge, and said ridge is broken off by slit.Slot area can be provided with profile one or more so that form, and the angle of inclination that said profile preferably forms with respect to the vertical axis of cylinder is identical with the angle of inclination of the row/zone 11 of slit and 22 formation of the profile between the row/zone 11 of slit.

Fig. 5 a and b illustrate the screening surface profile with aligning and cutaway view.Except the hole, the inner surface 27 of plate 20 is smooth.In Fig. 5 b; The profile ridge 22 of the outer surface of plate 20 is formed by the part 26 on front surface 29, surface 30, surface, back 31 and the plane 28 between hole 21; The plane 28 of said front surface slave plate 20 tilts to rise at a certain angle; Said surperficial 30 are arranged essentially parallel to the plane 28 of plate 20, and surface, said back 31 is substantially perpendicular to the plane 28 of plate 20.On the other hand, sieve plate can be considered to formed by the plate that is provided with ridge 22, and said ridge 22 is formed by said

part

29,30 and 31, and the planar section 28 between

part

29,30 and 31 is provided with machined hole 21.In the embodiment of Fig. 5 a, front surface 29 tilts perpendicular to the plane 28 and the surface, back of plate.

When the front surface of the profile ridge that receives fluid towards rear-inclined; Be that front surface tilts to rise from the screening surface plane; And when the surface, back is vertical (Fig. 5 b); The front surface that tilts receives the slurry that gets into cylinder, for example is intended to quicken the speed of slurry, in any case but total equal uniform flow that obtains to be passed in the screening surface holes in the screening surface.This eliminates the suspension erratic flow animal in the opposite direction that occurs in some cases.(Fig. 5 is a) time, and front surface opposing fluid and mixed flow animal increase the fluid that passes the screening surface thus, therefore increase the capacity of equipment when the front surface of profile ridge descends perpendicular to the back surface tilt of the plane on screening surface and ridge.

See that in Fig. 2-4 ridge 22 is with respect to the axis slight inclination of cylinder, and with respect to the direction of rotation slight inclination of cylinder.By means of the angle of inclination of ridge, with respect to the angle of elevation of the part 29 of the rotary speed of the incline direction of direction of rotation, cylinder and ridge, making aspect final separating resulting becomes possibility the circulation timei of the slurry in the optimization sieve.The direction of ridge 22 has such influence; If promptly the ridge 22 on sieve cylinder 5 recedes; Then ridge 22 tends to upwards be lifted at the fibrous suspension on the sieve cylinder; Increase the circulation timei of fibrous suspension in the sieve thus, separate becoming more accurate, in the amount that increases qualified thing, reduce not conform to the amount of investigate things.And utilize the ridge that turns forward, reduce circulation timei and increase capacity.Except that said factor, the height of sieve cylinder is also influential to the speed of service, angle of inclination etc.

According to the embodiment of Fig. 6, along the axle 7 of cylinder, (Fig. 6 a) changes the longitudinal direction 23 of the slit 21 in delegation's slit from the top down with respect to the posture of the direction of rotation 24 of cylinder.Uppermost slit 21 ' longitudinal direction parallel with the direction of rotation of cylinder the axis normal of cylinder (that is, with respect to).Simultaneously, the slit 21 below next " longitudinal direction (with respect to the axis of cylinder) front end 32 from this slit on the direction of rotation of cylinder begin to tilt, the front end 32 of (on the direction of rotation of cylinder) this slit is located than tail end 33 height of this slit thus.Therefore, next following slit is more more downward-sloping than top slit.Normally, the big 1-5 degree in the angle of inclination of following slit, usually big 2-4 degree.In such embodiment, the change on the direction of slit can be considered to descend from the top down.According to another embodiment (Fig. 6 b); The longitudinal direction of uppermost slit also is parallel to the direction of rotation of cylinder; And the groove next is inclined upwardly with respect to direction of rotation, thus the front end 32 of said slit ' on the direction of rotation of cylinder, locate than the tail end 33 of this slit ' low.Therefore, the slit below next is bigger than the top slit degree that is inclined upwardly at the tail end place.Normally, the big 1-5 degree in the angle of inclination of following slit, usually big 2-4 degree.In such embodiment, the change on the direction of slit can be considered to rise from the top down.In these embodiment, two slits that are positioned at another top can be substantially parallel, and still relevant is that the most of slit in delegation's slit is relative to each other with different location, angle of inclination.

(Fig. 6 c, d) according to a preferred embodiment of the invention; Along cylinder axis; The longitudinal direction of the slit in delegation's slit changes with respect to the position/angles of the direction of rotation of cylinder from bottom to top; Make the longitudinal direction of nethermost slit be parallel to the direction of rotation of cylinder, and next be positioned at top slit and tilt with respect to direction of rotation.Thereby the slit above next can be inclined upwardly (Fig. 6 c), thus on the direction of rotation of cylinder, and the front end 32 of this slit " locate be lower than the tail end 33 of this slit ".Usually, top slit tilts manyly than following slit.The big 1-5 degree in angle of inclination of top slit, usually big 2-4 degree.In such embodiment, the change on the direction of slit can be considered to rise from bottom to top.(Fig. 6 d) according to a preferred embodiment of the invention, top slit can correspondingly tilt, and makes on the direction of rotation of cylinder the front end 32 of this slit " locate be higher than the tail end 33 of this slit ".In this situation, slit is downward-sloping with respect to direction of rotation.In such embodiment, the change on the direction of slit can be considered to descend from bottom to top.

In the embodiment of slit downward-sloping (Fig. 6 a and d), obtain bigger capacity.Be inclined upwardly at slit among the embodiment of (Fig. 6 b and c), because contamination particle flows from the top down, so realize higher cleannes.

As from above description, becoming significantly the capacity that method and apparatus according to the invention allows to eliminate the defective of prior art equipment and method and therefore increases screening installation.Yet, it should be noted that the present invention in the above only describes some most important embodiment in more detail, it will limit the present invention anything but, and of the present invention being limited in claims appears, and claims limit protection scope of the present invention alone.

Claims

1. an equipment that is used for screen fibre suspension in particular for removing the coarse grained equipment such as knaur, comprising: housing (1); Be used for sending pipeline (2) to and being used to not conform to the outlet conduit (4,3) of investigate things and qualified thing of fibrous suspension; And sieve cylinder (5); Said sieve cylinder (5) rotatably is arranged in the said housing with respect to vertical axes (7) and has screening surface (20), and said screening surface (20) is provided with hole (21), and qualified thing partly flows through said hole (21); In said equipment; Arrange said pipeline and the said outlet conduit sent to, make said fibrous suspension be sent in the space (8) between said housing and the said sieve cylinder, and make said qualified thing discharge from the inside of said sieve cylinder; It is characterized in that; Said hole in the said screening surface is slit (21), said slit (21) have with respect to the direction of rotation of said cylinder-40 and+ratio of longitudinal direction between 40 degree and the length between 1.05-10 and width, said slit forms the slit of several rows (11); And construct the profile in the outside on said screening surface, make and between said slit is capable, arrange ridge (22).

2. equipment according to claim 1 is characterized in that, the longitudinal direction of said slit (23) with respect to the direction of rotation of said cylinder-30 and+30 degree between, preferably-15 degree and+15 degree between.

3. equipment according to claim 1 and 2 is characterized in that, the longitudinal direction of said slit (21) is parallel with the direction of rotation of said cylinder.

4. according to each described equipment in the aforementioned claim, it is characterized in that one of said slit (21) in the vertical direction is above another.

5. according to each described equipment in the aforementioned claim, it is characterized in that the length of said slit (21) is 2-8 with the ratio of width.

6. according to each described equipment in the aforementioned claim; It is characterized in that; Preferably arrange said profile ridge (22), make said profile ridge (22) with respect to the said vertical axis (7) of said sieve cylinder become-5 and+angle between 20 degree, preferably become the angle of+15 degree.

7. equipment according to claim 6 is characterized in that, a slit that is positioned at the some perpendicular row of said slit (21) formation of another location, top, and the end of wherein said slit forms and the parallel line of said profile ridge (22).

8. according to each described equipment in the aforementioned claim; It is characterized in that; Arrange the slit (21) in the slit of said some perpendicular row (11) in the horizontal direction; Make every slit in a perpendicular capable slit be positioned on the identical horizontal line, promptly be positioned on first group of horizontal line (12a), and correspondingly the slit in every line the slit is positioned on second group of horizontal line (12b).

9. according to claim 6 or 7 described equipment, it is characterized in that, construct the profile in the outside on said screening surface (20), make one or more ridges (25) be arranged in the zone of said slit, and between a said slit above another.

10. according to each described equipment in the aforementioned claim; It is characterized in that; Said ridge (22,25) forms said profile, said ridge have with respect to the angled front surface in the plane on said screening surface and surface, back (31) and possibly said front surface (29) with after be arranged essentially parallel to the surface (30) on the plane of said plate between surperficial (31).

11. equipment according to claim 10 is characterized in that, the said front surface (29) that receives the said profile ridge of fluid recedes, and promptly said front surface (29) is vertical from the plane inclination rising and the said surface, back (31) on said screening surface.

12. equipment according to claim 10 is characterized in that, the said front surface (29) of said profile ridge is to tilt to descend perpendicular to the plane and the said surface, back (31) on said screening surface.

13. equipment according to claim 10 is characterized in that, the said front surface of said profile ridge and surface, said back tilt.

14. according to each described equipment in the aforementioned claim; It is characterized in that; Along the axis of said cylinder, in the slit of a row (11) one be positioned at another top said slit (21 ', vertical (23) position/angles of 21 ") is with respect to direction of rotation (24) change of said cylinder.

15. equipment according to claim 14 is characterized in that, (lengthwise position of 21 ") tilts manyly than the lengthwise position of top slit or following slit (21 ') slit in delegation's slit.