CN112323530A

CN112323530A - Grinding disc for cylindrical pulping machine with variable tooth form

Info

Publication number: CN112323530A
Application number: CN202011093436.1A
Authority: CN
Inventors: 臧田良; 臧秉清; 施晓刚; 燕玉春
Original assignee: Dandong Yalu River Refining Plate Co ltd
Current assignee: Dandong Yalu River Refining Plate Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-02-05

Abstract

The invention relates to a grinding disc for a cylindrical refiner with variable tooth profile, which comprises 4-8 rotor grinding discs fixed on a refiner rotor and 4-8 stator grinding discs fixed on a refiner shell sliding block, wherein the grinding disc comprises an inlet end, a refining area and an outlet end, the inlet end, the refining area and the outlet end are respectively provided with grinding teeth and grooves, and the grinding teeth and the grooves at the inlet end, the refining area and the outlet end have different numbers, shapes, widths or cutting angles. The grinding disc adopts a structure of grinding teeth and grooves with various parameters such as shape, width, angle and the like, is beneficial to the entering of paper pulp raw materials into a grinding area, enhances the comprehensive grinding function of the grinding disc and improves the pulping quality and economic benefit.

Description

Grinding disc for cylindrical pulping machine with variable tooth form

Technical Field

The invention relates to a refiner plate of a refiner in the papermaking and pulping industry, in particular to a refiner plate of a cylindrical refiner with variable tooth form.

Background

The refiner is the main equipment for paper making and pulping, and comprises a double-disc refiner, a conical refiner, a cylindrical refiner and the like. The cylindrical pulping machine mainly comprises a machine shell, a frame, a rotor, a sliding plate, a pulp inlet channel, a pulp outlet channel and the like. One end of the rotor is a power end, the power end is provided by an external power source to enable the rotor to rotate, the inside of the other end of the rotor is hollow and serves as a paper pulp raw material channel, the paper pulp raw material enters the rotor hollow channel after being conveyed by a front end pipeline, an overflow hole in the middle of the rotor overflows and enters grinding sheets axially arranged on two sides of the hole respectively. The grinding plate is provided with a grinding area, and the grinding area is provided with grinding teeth and grooves, in the prior art, the sections of the grinding teeth and the grooves are mostly rectangular, and the grinding teeth and the grooves are also manufactured into a frustum shape with a draft angle due to the drawing of a casting model, wherein the grooves are used for conveying paper pulp raw materials, the grinding teeth are used for grinding and grinding, the paper pulp raw materials continuously enter a gap between the grinding plates in the process of entering the grooves at one end of the grinding plate inlet and then being discharged from the outlet at the other end, and the tooth surfaces of the grinding teeth are cut, extruded, kneaded and broomed to finish the grinding process. However, in the prior art, all the grinding teeth and grooves in the grinding area and the generatrix cutting angle α of the grinding plate are set to be the same and fixed angle arrangement, the widths of the grinding teeth and grooves are also always equal in the whole grinding plate grinding area, the tooth profile of the grinding teeth changes little or almost no change, and the grinding area of the grinding plate mainly plays a role in refining in the later stage of grinding, but the structural design of the existing grinding teeth and grooves limits the grinding effect on pulp raw materials, so that the regulation and control range of the grinding quality is small, resources are wasted, and the production efficiency is not high.

Disclosure of Invention

The invention aims to provide a grinding disc of a cylindrical refiner with a changed tooth form, which can enhance the comprehensive refining function of the grinding disc, adjust and improve the quality of refined fiber and improve the efficiency at the same time.

In order to achieve the purpose, the invention adopts the technical scheme that: a modified cylindrical refiner plate for a refiner, the plate comprising 4-8 rotor plates fixed to a rotor of the refiner and 4-8 stator plates fixed to a slider of a shell of the refiner, the plate comprising an inlet end, a refining area and an outlet end, the inlet end, the refining area and the outlet end all being provided with teeth and grooves, and the teeth and grooves of the inlet end, the refining area and the outlet end having different numbers, shapes, widths or cut-in angles alpha.

Further, the inlet, refining zone and outlet ends have different numbers of grinding teeth and grooves, the greater the number of grinding teeth and grooves provided closer to the outlet end, the more dense they appear;

furthermore, the angle variation range of the cutting angles alpha of the grinding teeth and the grooves at the inlet end, the grinding area and the outlet end is +/-0-60 degrees, and the optimal value is +/-25-45 degrees;

further, the width of the grinding teeth and the grooves from the inlet end to the outlet end is gradually narrowed, and the width variation range is 10mm to 1 mm;

further, the angle variation range of the cutting-in angle alpha is +/-25-45 degrees, and the width variation range is 5-1.5 mm;

furthermore, the shapes of the grinding teeth and the grooves are straight teeth and straight grooves, or curved grinding teeth and grooves, or the mixing arrangement of the straight teeth, the straight grooves and the curved grinding teeth and the curved grooves;

further, the grinding teeth and the grooves are connected smoothly or in a staggered manner from the inlet end to the outlet end or are divided into a plurality of areas, and the disconnection is in a straight line shape or a certain inclination which extends transversely to the axis of the grinding plate;

further, a guide slope toe is arranged at the end part of the grinding tooth;

further, a plurality of raw material channels are arranged in the grinding plate and used for increasing raw material supply;

further, a plurality of the grinding teeth and the grooves are arranged to be disconnected continuously or arranged to be disconnected at intervals of two or more grinding teeth and grooves; alternatively, the cutting angle α of the grinding teeth and grooves is changed at one or some positions of the inlet end, refining area or outlet end; or a plurality of the grinding teeth and the grooves are branched or grafted and combined; and the grinding teeth and the grooves are in a Z shape, an S shape or a fold line shape from the inlet end, the refining area to the outlet end.

Compared with the prior art, the invention has the following advantages: the grinding teeth and the grooves with different widths, quantities and shapes and the arranged raw material channel are beneficial to the pulp raw material to enter a pulp grinding area more quickly; the arrangement mode of gradually increasing the number of the grinding teeth and the grooves from the inlet end to the outlet end and simultaneously reducing the widths of the grinding teeth and the grooves is beneficial to adjusting and improving the grinding and pulping functions of the paper pulp raw materials in a pulping area and the pulping quality, improves the utilization efficiency of equipment and can embody obvious economic benefits.

Drawings

FIG. 1 is a schematic view of a cylindrical papermaking refiner;

FIG. 2 is a schematic view of a refiner plate with simultaneous varying width of the teeth and grooves;

FIG. 3 is a partial schematic view of a grinding sheet with different width tooth breaks and end shape changes;

FIG. 4 is a broken partial schematic view of different width grinding teeth;

FIG. 5 is a schematic view of a tooth and broken blade having different width variations;

FIG. 6 is a schematic view of a modified blade for the ends of the grinding teeth and grooves;

FIG. 7 is a schematic view of a modified blade having inlet end grinding teeth and grooves;

FIG. 8 is a schematic view of a refiner plate with different shape variations of the grinding teeth and grooves;

figure 9 is a schematic view of a blade having teeth and grooves of different widths and shape variations smoothly connected with a curve.

Figure 10 is a schematic view of a refiner plate provided with different widths and shapes of refiner teeth and grooves of the material channel.

Detailed Description

Figure 1 shows a cylindrical refiner 10 configuration. The structure of the cylindrical refiner 10 comprises a machine body shell 11, a frame 12, a rotor 13, a sliding plate 14, a pulp inlet channel 16, a pulp outlet channel 17 and the like, and grinding plates 1 and 1' of the cylindrical refiner 10 are respectively arranged on the rotor 13 and the sliding plate 14 for matching use. The rotor 13 is supported and fixed by the frames 12 at the two ends and the bearings, one end 13 ' is powered by an external power source to rotate, the inside of the other end 13 ' is a hollow structure as a channel 16 of a paper pulp raw material, the paper pulp raw material is conveyed by a pipeline and then enters the hollow channel 16 of the rotor 13, a plurality of overflow holes 24 arranged at the approximate middle position of the rotor 13 radially overflow and respectively enter gaps of two pairs of four groups of grinding sheets 1 and 1 ' which are distributed at the left side and the right side of the overflow holes 24 along the axial direction, the two pairs of four groups of grinding sheets 1 and 1 ' respectively consist of a rotor grinding sheet 1 and a stator grinding sheet 1 ', and the rotor grinding sheet 1 and the stator grinding sheet. The grinding sheet installed on the rotor 13 is called rotor grinding sheet 1, the grinding sheet installed on the sliding plate 14 is called stator grinding sheet 1 ', a clearance for grinding exists between the rotor grinding sheet 1 and the grinding area 2 of the stator grinding sheet 1 ', and the sliding plate 14 and the machine shell 11 can realize sliding adjustment connection through the sliding adjusting block 15, so that the stator grinding sheet 1 ' moves radially to adjust the clearance between the stator grinding sheet 1 and the rotor grinding sheet 1. Each group of grinding plates 1 and 1' is formed by combining 4-8 plates in the circumferential direction into a cylinder shape. The grinding area 2 of the grinding plates 1 and 1 ' is composed of a plurality of grinding teeth 4 and grooves 5 which are arranged at intervals in sequence and used for conveying paper pulp raw materials and grinding, the paper pulp raw materials continuously enter the gap between the grinding plates 1 and 1 ' in the process of entering from the grooves 5 at the inlet ends 3 of the grinding plates 1 and 1 ' and then being discharged from the outlet ends 22 at the other ends, and the grinding process is completed on the tooth surfaces of the

grinding teeth

4, 34, 44 and 54 and in the

grooves

5, 35, 45 and 55.

The quality of the pulping effect of the paper making mainly depends on whether the tooth shapes of the grinding teeth 4 and the grooves 5 are proper or not, the tooth shapes comprise parameters such as tooth width of the grinding teeth, a cutting angle alpha formed by the grinding teeth and a generating line of the grinding sheet, groove width, groove depth and the like, and one or more of the parameters can be selected according to different and specific requirements of raw materials for paper making and pulping. The pulp raw material, before entering the refining zone 2 of the refiner plates 1, 1', is shaped as large, flaky or disordered fiber clusters, which are crushed, defibered, cut off, and ground refined by the

teeth

4, 34, 44, 54 of different shapes, widths, and angles of cut-in angle alpha, respectively, and the effect of the pulp raw material treated with the parameters of tooth profile, tooth width, groove depth, and cut-in angle alpha of different teeth is different, the more the number of

teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 are arranged closer to the outlet end 22 from the inlet end 3 to the outlet end 22, and the width is gradually narrowed from the inlet end to the outlet end, so that the

teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 are arranged closer to the outlet end 22, the structure arrangement enables the pulp raw material to be ground more and more finely. The generatrix of the refiner plates 1, 1 'of the cylindrical refiner 10 is the projection of the axial lead 0 of the rotor plate 1 and the stator plate 1' on the surface of the refining area 2 of the refiner plates 1, 1 ', and the cut-in angle alpha is the included angle formed by the refiner teeth 4 and the grooves 5 and the refiner rotor 13 in the same rotating direction 25 and extending from the inlet end 3 to the outlet end 22 with the generatrix of the refiner plates 1, 1'; the angle variation range of the cut-in angle alpha is +/-0-60 degrees, and the optimal value is +/-25-45 degrees. One of the functions of the cut-in angle α is to distinguish between the functions of cutting, squeezing, kneading, fibrillation, etc., such as: the cut-in angle α is set to be smaller, such as: +/-0 to +/-20 degrees, outstanding cutting function, and conversely, the cutting angle alpha is larger, the cutting is less, the grinding is more, the extruding, the kneading and the brooming are outstanding. Another function of the cut-in angle alpha is to pump the slurry at a suitable angle to maximize the transport of the raw material from the inlet end 3 to the interior of the refiner plates 1, 1'.

The grinding plates 1 and 1 'of the cylindrical papermaking pulping machine 10 provided by the invention can adjust or further improve the grinding and pulping effects of the grinding plates 1 and 1' and improve the pulping quality. As shown in fig. 2, the grinding plates 1, 1' have the same cutting angle α from the inlet end 3 to the outlet end 22, but the grinding teeth 4 and the grooves 5 have different width variations, i.e. the widths of the

grinding teeth

4, 34, 44, 54 and the

grooves

5, 35, 45, 55 gradually narrow from the inlet end 3 to the outlet end 22, for example: the width varies from 10mm to 1mm, preferably from 5mm to 1.5mm, the number of

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 being increased and thus more dense, and in addition, the connection of grinding

teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 of each two different widths is provided in the form of a break 23 in the

grinding tooth

4, 34, 44, 54. The advantage of this form of the interruptions 23 of the

grinding teeth

4, 34, 44, 54 is that the pulp material can be redistributed here for homogenization. The pattern and number of the interruptions 23 can be varied, and as shown in fig. 3, the pattern of the interruptions 23 of the

grinding teeth

4, 34, 44, 54 is such that a straight-line-shaped interruption 23 extending substantially transversely to the axis 0 of the grinding plate 1, 1' is provided, and the limitation of the interruption is relatively clear, which facilitates the redistribution of the pulp raw material. The starting point 27 of each

tooth

4, 34, 44, 54 after the break 23 can be arranged in many different ways, such as staggered, in groups of two, three or several, and the staggered starting point 27 is more favorable for the entry and passage of the stock.

Fig. 4 shows the form of the interruptions 23 of the

grinding teeth

4, 34, 44, 54, which differs from the straight interruptions 23 extending transversely of the axis 0 of the grinding plate 1, 1' shown in fig. 3, but with a certain inclination of the interruptions 23, which clearly distinguishes the

grinding teeth

4, 34, 44, 54 of different widths, the width of the interruptions 23 can be set from one groove width to several groove widths. Between each break 23 a distinct number of

areas

9, 9', 9 "are formed.

The different width-changing

teeth

4, 34, 44, 54 and the break-away bands of the refiner plates 1, 1' of figure 5 are wider than in the transverse direction of figure 2, being arranged at an angle of opposite negative polarity to the positive cutting-in angle alpha. This opposite angle arrangement results in an improved refining quality of the refiner plates 1, 1' because during refining the pulp stock near the outlet end 22 may, due to the negative angle to the direction of rotation, produce a power towards the inlet end 3, return towards the inlet end 3 in the break 23, and re-join the distribution at the break 23 for refining, which results in a better quality. In the case where the pulp raw material at the outlet end 22 is insufficient, the pulp raw material may be fed to the outlet end 22. Fig. 5 also shows that the starting end portions 27 of the

grinding teeth

4, 34, 44, 54 of the grinding plates 1, 1 'close to the side edge 28 in the initial direction of rotation are uneven, and the protruding starting end portions 27 force the pulp raw material to enter the refining area 2 in time, so that the pulp raw material is prevented from overflowing prematurely along the side edge 28 of the grinding plate 1, 1' to the outlet end 22, and the refining quality is influenced.

Fig. 6 is a schematic view of a modification of the end portions 27 of the

grinding teeth

4, 34, 44, 54, which is identical to the starting end portions 27 of the

grinding teeth

4, 34, 44, 54 of the side edges 28 of the refiner plates 1, 1' of fig. 5, except that the tooth form angle of the

grinding teeth

4, 34, 44, 54 at the inlet end 3 may be a larger angle than the cut-in angle α or the tooth form may be curved to facilitate the pumping of pulp stock to the refining zone 2.

Fig. 7 is a tooth profile schematic diagram of a grinding plate 1, 1' with improved

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 at the inlet end 3, wherein staggered starting end parts 27 with different lengths are more favorable for entering and passing of pulp raw materials, the starting end parts 27 of the

grinding teeth

4, 34, 44, 54 at the inlet end 3 are more greatly different in shape length, wider in width and higher in strength than the front parts, the starting end parts 27 are staggered in groups of three or four, and the three or four starting end parts 27 are different in length, and the tooth profile angle of the grinding teeth can be an angle larger than the cut-in angle alpha or a curved grinding tooth profile, so as to be favorable for pumping the pulp raw materials into the refining area 2.

Figure 8 shows a

grinding tooth

4, 34, 44, 54 and

groove

5, 35, 45, 55 with different width variations and the

grinding tooth

4, 34, 44, 54 and

groove

5, 35, 45, 55 are not continuous straight lines from the inlet end 3 to the outlet end 22, wherein several

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 are arranged as a continuous break 23 or arranged to space two or more

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 by a break 23; alternatively, the cutting angle α of the

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 is changed at a certain position or positions at the inlet end 3, refining zone 2 or outlet end 22; alternatively, the plurality of grinding

teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 are branched or grafted and combined, and the grinding teeth 4 and grooves 5 run in a zigzag shape, an S shape or a zigzag shape from the inlet end 3, the refining area 2 to the outlet end 22, and the invention is not limited. Preferably, the width of the

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 may also be arranged to be gradually narrower from the inlet end 3 towards the outlet end 22, but the number of the

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 is gradually increased so that the

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 are arranged more densely from the inlet end 3 towards the outlet end 22; preferably, a number of interruptions 23 are provided to ensure the penetration of the

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55, thereby facilitating a smooth passage of the pulp stock. The connection of the

grinding teeth

4, 34, 44, 54 and the

grooves

5, 35, 45, 55, the following

grinding teeth

4, 34, 44, 54 face the initial direction 25 of rotation of the grinding plate 1, 1' and are staggered with the

previous grinding teeth

4, 34, 44, 54 by a certain width, the direction of the end part 27 of the following

grinding teeth

4, 34, 44, 54 is changed relative to the cutting angle alpha, the change of the end part 27 causes the change of the flow direction of the pulp raw material, and further, the leading slope foot 29 is arranged at the front end of the end part 27 of the following

grinding teeth

4, 34, 44, 54, thereby the pulp raw material is easy to rise to the tooth grinding surface of the

grinding teeth

4, 34, 44, 54 for grinding and refining.

The refining zone 2 of each refiner plate 1, 1' comprises a structure of

teeth

4, 34, 44, 54 and grooves 5 with a plurality of shapes, widths and angles of cut-in angles alpha, the

teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 are varied simultaneously, the widths and cut-in angles alpha of the

teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 from the inlet end 3 to the outlet end 22 are different, and the number of

teeth

34, 44, 54 and

grooves

35, 45, 55 is increased more and more densely as the outlet end 22 is closer. The variation in width may be individual or gradual, with different widths, angles of the cut-in angle alpha and number of

grinding teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 being connected together or disconnected by the break 23, and the connection may be smooth, for example with rounded corners, connected by curved grinding teeth. Due to the change of the tooth width and the fact that the

grinding teeth

4, 34, 44, 54 are connected or disconnected by the break 23, or the cutting angle alpha is changed, or the grinding teeth are broken into finer and narrower grinding teeth, or the grinding teeth are combined by other rack bars, the refining area 2 of the refiner plate 1, 1 'is divided into

several areas

9, 9', 9 ", and the refining efficacy of the areas is different in actual operation. Figure 9 shows a schematic representation of the tooth profile of a refiner plate 1, 1' with different width variations of the

refiner teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55 changing the angle of the cutting angle alpha or being broken down into finer and narrower teeth and being smoothly connected by a curved line. The positions where the

teeth

4, 34, 44, 54 and the

grooves

5, 35, 45, 55 are connected or disconnected 23 are staggered in the radial circumference of the refiner plate 1, 1'. The positions where the connecting or disconnected 23 is disconnected are places where it is easy to wear each other or where it is easy to wear itself, whereby it is easy to form uneven grooves on the

teeth

4, 34, 44, 54 of the refiner plate or the refiner plate 1, 1 ' matching it, which affects the refining quality and the service life of the refiner plate 1, 1 ', and thus the positions of the respective connecting or disconnected 23 are distributed offset on different circumferential lines in the direction of rotation of the refiner plate 1, 1 '.

The grinding

teeth

4, 34, 44, 54 and the

grooves

5, 35, 45, 55 are simultaneously in the structures of the grinding

teeth

4, 34, 44, 54 and the

grooves

5, 35, 45, 55 with various shape, width, angle and other parameter changes, so that the grinding and refining capabilities of cutting, extruding, kneading, devillicating and leveling and the like of the grinding sheets 1, 1 'can be embodied to the greatest extent, and the grinding sheets 1, 1' of the cylindrical refiner 10 with single function originally have larger use. In order to achieve sufficient and uniform refining, a plurality of material channels 16 'may be provided in front of the refining area 2 of the refiner plates 1, 1', or the starting end portions 27 of the

teeth

4, 34, 44, 54 near the side 28 in the initial direction of rotation may be provided in an uneven pattern, such as by providing a tooth with a length longer than the

other teeth

4, 34, 44, 54 at every other pair of

teeth

4, 34, 44, 54 and

grooves

5, 35, 45, 55, and by providing a protruding

tooth

4, 34, 44, 54 in the refining area 2. As shown in fig. 10, the added material channels 16 'provided in the refiner plates 1, 1' may be material channels 16 'parallel to the generatrix of the refiner plates 1, 1' or at an angle equal to or smaller than the cutting angle α in shape, or may be provided by interruptions 23. The figure shows that the direction of the material passage at the inlet end 3 is in the same direction as the cutting angle alpha of the grinding

teeth

4, 34, 44, 54, but that the direction of the material passing through the material passage 16' as it passes to the outlet end 22 is gradually changed, in the opposite direction to the cutting angle alpha, with a negative value. The direction of the material passage 16 'at the inlet end 3 is arranged to be the same as the cut angle alpha so that the grinding

teeth

4, 34, 44, 54 of the inlet end 3 act as pump blades to pump pulp material into the refining zone 2 of the refiner plates 1, 1'. The change of the direction of the material passage 16' relative to the cutting angle alpha of the grinding

teeth

4, 34, 44, 54 in the gradual approach to the outlet end 22 presents a negative value, and the angle arrangement makes the flow of the pulp raw material blocked and even reversed, thereby prolonging the detention time of the pulp raw material in the refining area 2, facilitating the full-grinding refining, and the above arrangement is beneficial to the more rapid entering of the pulp raw material into the refining area and the full-grinding, and improving the refining quality.

The above embodiments are merely illustrative of the present invention, but do not limit the present invention. The person skilled in the art can fully realize the new technical solution according to the present invention, and all the modifications and equivalent changes made to the present invention belong to the protection scope of the present invention.

Claims

1. A kind of tooth form changes the cylindrical refiner grinding disc for refiner, this grinding disc (1, 1 ') includes 4-8 rotor grinding discs (1) fixed on the rotor (13) of the mill and 4-8 stator grinding discs (1') fixed on the slide block (14) of the mill casing (11), characterized by that: the refiner plate (1, 1') comprises an inlet end (3), a refining zone (2) and an outlet end (22), and the inlet end (3), the refining zone (2) and the outlet end (22) are provided with teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55), and the teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) of the inlet end (3), the refining zone (2) and the outlet end (22) have different numbers, shapes, widths or cut-in angles alpha.

2. A refiner plate for a cylindrical refiner having a varying tooth profile according to claim 1, wherein: the inlet end (3), refining zone (2) and outlet end (22) have different numbers of grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55), the larger the number of grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) located closer to the outlet end (22), the denser the grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) exhibit.

3. A refiner plate for a cylindrical refiner having a varying tooth profile according to claim 2, wherein: the angle variation of the cutting angle alpha of the grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) of the inlet end (3), refining zone (2) and outlet end (22) is within the range of + -0 deg. -60 deg..

4. A refiner plate for a cylindrical refiner having a varying tooth profile according to claim 3, wherein: the width of the grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) from the inlet end (3) to the outlet end (22) is arranged in a gradually narrowing manner, and the width is changed within the range of 10mm to 1 mm.

5. The refiner plate of claim 4 having a varying tooth profile, wherein: the angle variation range of the cut-in angle alpha is +/-25-45 degrees, and the width variation range is 5-1.5 mm.

6. A refiner plate according to any one of claims 1 to 5, wherein: the shapes of the grinding teeth (4, 34, 44, 54) and the grooves (5, 35, 45, 55) are straight teeth and straight grooves, or are curved grinding teeth (6) and grooves (6 '), or are mixed arrangement of the straight teeth, the straight grooves and the curved grinding teeth (6) and the grooves (6').

7. The refiner plate of claim 6 wherein the tooth form of the plate is varied by: the grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) are smoothly or alternatively connected or divided into a plurality of areas (9, 9 ') by breaks (23) from the inlet end (3) to the outlet end (22), and the breaks (23) are in a straight line shape or a certain inclination extending transversely to the axis of the grinding plate (1, 1').

8. A refiner plate for a cylindrical refiner having a varying tooth profile according to claim 1, wherein: the end (27) of the inlet end (3) where the grinding teeth (4, 34, 44, 54) are connected in a staggered manner is provided with a guide slope toe (29).

9. A refiner plate for a cylindrical refiner having a varying tooth profile according to claim 7, wherein: a plurality of raw material channels (16 ') are arranged on the grinding plates (1, 1') for increasing the raw material supply.

10. A refiner plate for a cylindrical refiner having a varying tooth profile according to claim 7, wherein: -a number of said grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) are arranged to be interrupted (23) continuously or arranged to be interrupted (23) by two or more grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55); alternatively, the cutting angle α of the grinding teeth (4, 34, 44, 54) and grooves (5, 35, 45, 55) is changed at a certain position or positions of the inlet end (3), refining zone (2) or outlet end (3); or a plurality of the grinding teeth (4, 34, 44, 54) and the grooves (5, 35, 45, 55) are branched or grafted and combined; and the grinding teeth (4) and the grooves (5) are in a Z shape, an S shape or a broken line shape from the inlet end (3) to the outlet end (22) from the refining area (2).