Pulp paper pulverizer

Abstract

The pulp paper pulverizer has a hand-tearing pulverizing effect, produced sheet pulp is uniform in boundary dimension, plush is arranged on the periphery of the sheet pulp, shearing hard marks do not exist, a small amount of finished product fine powder is generated, screen blockage and fire disasters are prevented, use is convenient, the service life is long, and the pulp paper pulverizer mainly comprises a feeding port (1), a hammer sheet (2), a rotor (3), a screen sheet (9), a screen pressing frame (13), a discharging port (7), a machine body (8) and a motor (6). The hammer mill is characterized in that two fixed cutters (14) are arranged below the feeding port (1), a pressing wheel (13) is arranged above the fixed cutters (14), a disc of the rotor (3) is in a giant tooth shape, cutter rests are arranged on the giant teeth, the front end faces of the hammers (2) can be arranged on the end face of the rotor (3) to form a seamless circumference shape, the cutter rests of the rotor (3) are divided into more than three groups on the axial plane of the rotor (3), and the hammers are finger hammers (2).

Description

Technical Field

[0001] The invention relates to a pulverizing device used in the textile, papermaking and other industries, in particular to a pulp and paper pulverizer for lyocell raw materials. Background Art

[0002] Pulp and paper impregnation and swelling is an important process in the spinning solution process of the lyocell fiber manufacturing industry. The process requires the pulverizer to "hand-tear" the pulp and paper into sheets of various specifications, but the external dimensions must be uniform, the error must be small, there must be a hand-tear effect, there must be fluff around, there must be no shear hard marks, and the finished product must have no fine powder or very little. It can produce 3-6 mm, 20-25 mm, 30-35 mm, 40-45 mm and other specifications. Such finished products can achieve under the same time change conditions, the same solvent concentration change curve conditions, the same temperature change curve conditions and the same external pressure conditions, avoid initial dissolution, maintain synchronous and continuous swelling, achieve synchronous and consistent pulp and paper thorough impregnation, and even achieve no white spots, thereby obtaining excellent quality spinning solution. The existing similar pulverizing equipments include: a shearing device for paper processing CN214418902U, a pulp paper pulverizer CN108951242, a pulp pulverizer CN2084409905, a pulp pulverizer for paper production CN214529920U, a hammer pulverizer CN202221363577.5, etc. These pulverizers have defects. Some are sheared by shearing pulverizers, and the sheared materials have hard lumps around them, and the shapes and sizes are different, which are unqualified; some use large sieve holes or no sieves, and the finished products have large amplitudes, ranging from 1 to 50 mm, with different sizes and uneven force, which are unqualified; some are cyclic pulverization, and although the size of the paper pieces is small, they are hammered many times, with uneven hard marks and a lot of fine powder, which are unqualified.

[0003] This type of pulverizer usually consists of a feed port, a machine body, a rotor, a hammer, a screen, a screen press, a motor, a discharge port, etc. When working, the motor drives the rotor to rotate the hammer on the rotor. After the material enters from the feed port, it is continuously hammered by the hammer and its size becomes smaller. The crushed material powder passes through the sieve holes of the sieve, and the sieve holes control the particle size. The qualified ones are discharged from the pulverizer discharge port. Solving the uneven size of pulp and paper products is the difficulty of this project, especially when the tail paper is crushed in large pieces, it will suddenly be brought in, and the material in the pulverizer cavity will suddenly increase, causing uneven hammering times of pulp and paper crushing, and uneven hardness and size of the product.

[0004] Since 1939, when Enka Company of the United States successfully used cellulose as raw material and NMMO solution as solvent to dissolve and spin cellulose filaments in a coagulation bath, many scientists and engineers at home and abroad, including the United States, Germany, France, Russia, Austria, Japan, South Korea, etc., have invested a lot of money and manpower to develop pulp and paper crushers, but they have not been successful. For a long time, the above problems have plagued the processing technology of lyocell raw materials and have become a world-recognized problem in the industry. Summary of the invention

[0005] The purpose of the present invention is to provide a pulp and paper pulverizer, which has a hand-tearing pulverizing effect, produces pulp and paper products with uniform dimensions, plush on the periphery, no shearing marks, less fine powder, prevents screen blockage, prevents fire, is easy to use and has a long service life.

[0006] The purpose of the present invention can be achieved through the following technical scheme. A pulp and paper shredder mainly includes a feed port 1, a hammer 2, a rotor 3, a screen 9, a screen pressing frame 5, a feed port 7, a body 8, and a motor 6. The feature of the feed port 1 is that one side is straight and the other side is inclined, so that if a piece of paper gets stuck, it is convenient to take it out from the inclined port. There are two fixed knives 14 below the feed port 1, which are relatively installed. The fixed knives 14 have an arc-shaped working angle to prevent the formation of hard lumps of paper. The mounting hole of the fixed knife 14 is a waist hole, and the distance from the hammer 2 can be adjusted up and down. There is a pressure wheel 13 near the top of the fixed knife 14, and the pressure wheel 13 has a spring to adjust the pressure. The pressure wheel 13 is close to the fixed knife 14, which is conducive to shortening the length of the tail of the pulp and paper and facilitating the uniformity of the paper product. The disc of the rotor 3 is in the shape of giant teeth, and the giant teeth are equally divided into 8 or more. Each giant tooth is installed with 2 groups of tool holders, each group has two holes, and a total of 4 holes. One group of holes is used to install hammers 2, and the other group is spare holes. When one group is worn and deformed, there is no need to replace the rotor. Replacing with spare holes can double the service life of the rotor. At the same time, it is also convenient to extract the pin rod when replacing an adjacent group of hammers. In the axial plane of the rotor 3, the rotor 3 tool holder is divided into more than 3 groups. In the end plane of the rotor 3, the angle between each group is 15 degrees, so that the arrangement of the end faces of the hammers 2 can be connected into a circular shape in the cross-section of the rotor 3. In the axial plane of the rotor 3, there are a considerable number of hammers 2 at any point on the circumference. The top of the hammer 2 forms a certain width to support the front edge of the paper. The purpose is to prevent the tail end of the paper from falling off suddenly when there is no pressure roller 13 to press the whole piece, and there is always a part of the paper on the hammer to avoid uneven finished paper. The hammer 2 of the pulp and paper pulverizer is a finger hammer 2. Two pin holes 16 are provided at one end of the hammer body 15. The two holes can prevent the hammer from shaking. Two pin rods are used to connect with the tool holder of the rotor 3 of the pulverizer to reduce the impact of shaking. The other end is a working end face 17. The two corners of the working end face 17 are finger-shaped, without sharp corners or sharp edges. They are sintered with tungsten carbide to form an elliptical spherical shape with a rough friction surface to prevent the formation of paper lumps. There is a groove in the middle of the working end face 17, and a palm-type scraper 18 is welded in the groove. The front end of the palm-type scraper 18 has uniform little fingers 19, and there are uniform grooves between the little fingers 19. The width of the little fingers 19 and the grooves are the same. The two corners of the little finger 19 are elliptical spherical, without sharp corners or sharp edges. They are sintered with tungsten carbide and have a rough friction surface to prevent the formation of paper lumps.The palm scraper 18 has a mounting groove at the other end, which is vertically embedded and welded with the groove in the middle of the working end face 17 of the hammer matrix 15. The thickness of the little finger 19 is less than the width of the working end face 17 of the hammer matrix 15, and the ratio of the two is between 1 / 2 and 1 / 5. This is also the key technology for producing intermittent feeding state and the key technology for solving the problem of uniform tailing crushing. When working, the front corner of the working end face 17 of the hammer matrix 15 first touches the front edge of the paper. Due to the first touch, the paper breaks a groove, and then multiple little fingers 19 tear the paper again. At this time, due to the long working end face 17, the paper groove rides on the working end face 17, and the paper is supported. After the working end face 17, feeding begins again, forming a working state of feed, stop, feed, and stop, which effectively prevents large tailings. When the pressure of the pressure roller 13 is lost, all the feed is fed into the crusher at the same time. The screen 9 is mounted on the screen pressing frame 5, and a vibration motor 10 is provided below the screen pressing frame 5. The screen pressing frame 5 is separated from the machine body 8 by a spring vibration isolation device 20, so that the connected screen 9 and the screen pressing frame 5 can vibrate independently together, and the finger hammer 2 and the screen 9 have a safe distance and will not collide. Another finger hammer 2 can also be produced, and the front end of the palm scraper 18 has a little finger 19 without a groove, which can produce large pieces.

[0007] When the pulverizer is working, the pulp sheet is pushed down by the pressure generated between the belt conveyor 11 and the pressure roller 12, and enters the pulverizer vertically through the pressure rod 13 and the fixed hammer 14. The two fixed hammers 14 have arc-shaped working angles, and the pulp and paper will not produce hard marks. The finger hammer 2 hammers the paper sheet from the tangential direction. All working surfaces in contact with the pulp and paper are made into finger-shaped, without sharp corners and sharp edges. They are sintered with tungsten carbide to form an elliptical sphere with a rough friction surface, which produces the effect of hand-torn paper, making the periphery of the small piece fluffy and without hard marks. The rotor 3 is divided into multiple groups of evenly distributed staggered tool holders, so that the end face of the hammer 2 forms a whole seamless circumference, so that the tail section of the paper sheet that comes in can always be supported by a group of hammers, and the tail end of the large piece will not rush into the pulverizer cavity all at once, forming an uneven finished product. The rotating speed of the finger hammer 2 cooperates with the feeding speed of the belt conveyor 11 to control the length of the small paper piece. The width of the small paper piece can be controlled by selecting the small finger 19 and the width of the slot, so as to produce pulp paper of a predetermined size. When the pulp paper enters the pulverizer, the pulp is constantly torn, bent, dragged and pushed up by the hammer 2, so that the pulp paper enters the pulverizer in an intermittent manner of advancing, stopping, advancing, stopping. Two pin holes 16 are provided at one end of the hammer mother body 15 to prevent the finger hammer from shaking during operation, so that the small paper pieces are more uniform. The thickness of the little finger 19 is less than the width of the working end face 17 of the hammer matrix 15, which is also the key technology for producing the intermittent feeding state and the key technology for solving the problem of uniform crushing of tailings. When working, the front corner of the working end face 17 of the hammer matrix 15 first touches the front edge of the paper sheet. Due to the first touch, the paper sheet breaks a groove, and then the multiple little fingers 19 tear the paper sheet. At this time, due to the long working end face 17, the paper sheet groove rides on the working end face 17, and the paper sheet is supported. After the working end face 17, feeding begins again, forming a working state of feeding, stopping, feeding, and stopping, effectively preventing large tailings. When the pressure of the pressure roller 13 is lost, all the tailings are fed into the crusher at the same time. The ratio of the thickness of the little finger 19 to the width of the working end face 17 of the hammer matrix 15 is between 1 / 2 and 1 / 5. When it is greater than 1 / 2, the bending drag increases, and the large tailings will be fed into the crusher at the same time. When it is less than 1 / 5, the service life of the little finger 19 is short. The finger hammers 2 are installed in 8 groups, 180 degrees symmetrically, and staggered with a little finger 19, so that the paper pieces are evenly crushed without gaps. If the finger hammers 2 are worn or a small amount of large pieces enter the crusher accidentally, the paper pieces will be discharged in time through the vibrating screen 9, avoiding large pieces and fine powder. At the same time, the possibility of blocking the screen hole is eliminated to prevent fire. The vibrating screen 9 plays the role of the final safety insurance.

[0008] According to the above structure, a pulp and paper pulverizer is provided, which can produce sheet paper of various specifications, with diameters of 3-6 mm, 20-25 mm, 30-35 mm, 40-45 mm and other specifications, with uniform external dimensions, hand-tear effect, plush around, no shear hard marks, no fine powder in the finished product, and can prevent screen blockage and fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a front view of the present invention.

[0010] Figure 2 It is a side view cross-sectional schematic diagram of the present invention, including a belt conveyor 11 and a pressure roller 12. The rotor 3 is divided into a plurality of evenly spaced staggered tool holders, and after the hammer 2 is installed, the end surface of the hammer forms a whole seamless circumference.

[0011] Figure 3 It is a front schematic diagram of the fixed knife 14 of the present invention.

[0012] Figure 4 It is a cross-sectional schematic diagram of the fixed knife 14 of the present invention, which has an arc-shaped working angle.

[0013] Figure 5 It is an oblique side stereoscopic view of the rotor 3 of the pulverizer of the present invention. There are 8 sets of tool holders on the end face of the rotor 3 and 3 sets in the axial direction. The phase difference of the end face of the rotor 3 is 15 degrees.

[0014] Figure 6 The disc of the rotor 3 of the pulverizer of the present invention is in the shape of giant teeth, with 4 mounting holes for installing hammers and 2 holes for standby use.

[0015] Figure 7 It is an oblique side stereoscopic view of the finger hammer of the pulverizer of the present invention, with multiple fingers, and the thickness of the little finger 19 is smaller than the width of the working end surface 17 of the hammer body 15.

[0016] Figure 8 It is an oblique side stereoscopic view of the finger hammer of the pulverizer of the present invention, with a single finger. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Embodiment 1, as Figure 1 , Figure 2The pulp and paper shredder shown mainly includes a feed port 1, a hammer 2, a rotor 3, a screen 9, a screen pressing frame 5, a feed port 7, a body 8, and a motor 6. It is characterized in that one side of the feed port 1 is straight and the other side is inclined. There are two fixed knives 14 below the feed port 1, which are installed opposite to each other. The fixed knives 14 have an arc-shaped working angle. The mounting hole of the fixed knife 14 is a waist hole, and the distance from the hammer 2 can be adjusted up and down. There is a pressure wheel 13 near the top of the fixed knife 14. The pressure wheel 13 has a spring to adjust the pressure, and the pressure wheel 13 is close to the fixed knife 14. The disc of the rotor 3 is in the shape of giant teeth, and the giant teeth are equally divided into 8. Each giant tooth is equipped with 2 groups of tool holders, each group has two holes, and a total of 4 holes. One group of holes is used to install the hammer 2, and the other group is a spare hole. In the axial plane of the rotor 3, the rotor 3 tool holder is divided into 3 groups. In the end plane of the rotor 3, the angle between each group is 15 degrees, so that the arrangement of the end faces of the hammer 2 can be connected to form a circle in the cross section of the rotor 3. The hammer 2 of the pulp and paper crusher is a finger hammer 2. Two pin holes 16 are provided at one end of the hammer mother body 15. Two pin rods are used to connect with the crushing The rotor 3 of the machine is connected to the tool holder, and the other end is the working end face 17. The two corners of the working end face 17 are finger-shaped, without sharp corners or sharp edges, and are sintered with tungsten carbide to form an elliptical sphere with a rough friction surface. There is a groove in the middle of the working end face 17, and a palm-type scraper 18 is welded in the groove. The front end of the palm-type scraper 18 has uniform little fingers 19, and there are uniform grooves between the little fingers 19. The width of the little fingers 19 and the grooves are the same. The two corners of the little fingers 19 are elliptical spheres, without sharp corners or sharp edges, and are sintered with tungsten carbide, and have a rough friction surface. The other end of the palm-type scraper 18 has a mounting groove, which is vertically embedded and welded with the groove in the middle of the working end face 17 of the hammer mother body 15. The thickness of the little finger 19 is less than the width of the working end face 17 of the hammer mother body 15, and the ratio of the two is 2 / 5. The screen 9 is installed on the screen press frame 5, but a vibration motor 10 is provided below the screen press frame 5. The screen press frame 5 is separated from the machine body 8 by a spring vibration isolation device 20, so that the connected screen 9 and the screen press frame 5 can vibrate independently together, and the rake hammer 2 has a safe distance from the screen 9 and will not collide with each other.

[0018] Embodiment 2, its basic structure is Figure 1 , Figure 2 The embodiment shown in is the same as that shown in , except that the finger hammer 2 is not used, but a common hammer 2 of several times thickness is used instead, the hammer thickness is 4 mm, and a hammer isolation ring of several times thickness is used to replace it, and the isolation ring width is 4 mm.

[0019] Example 3, its basic structure is as follows Figure 1 , 2 ,use Figure 8 The finger hammer of the pulverizer of the present invention can change the width of a single finger to produce paper sheets of various large specifications such as 20-25 mm, 30-35 mm, 40-45 mm, etc.

[0020] Example 4, its basic structure is as follows Figure 1 , Figure 2, but there is no screen press frame 5 and vibration motor 10, and the screen mesh is selected with a large aperture of 50 mm. Figure 8 The finger hammer of the pulverizer of the present invention can change the width of a single finger to produce paper sheets of 20-25 mm, 30-35 mm, 40-45 mm, etc. The effect will be slightly worse, but the cost is lower.

[0021] Beneficial Effects

[0022] When the pulverizer is working, the two fixed hammers 14 have an arc-shaped working angle, and the pulp and paper will not produce hard marks. All the working surfaces of the finger hammer 2 that contact the pulp and paper are finger-shaped, without sharp corners and sharp edges. They are sintered with tungsten carbide to form an elliptical sphere with a rough friction surface, which produces the effect of hand-tearing paper, so that the periphery of the small piece is plush and has no hard marks. The rotor 3 is divided into multiple groups of evenly distributed staggered tool holders, so that the end face of the hammer 2 forms a whole seamless circumference, so that the tail section of the paper sheet that comes in can always be supported by a group of hammers, and the tail end of the large piece will not be allowed to rush into the pulverizer cavity all at once, forming uneven finished products. The rotation speed of the finger hammer 2 cooperates with the feeding speed of the belt conveyor 11 to control the length of the small paper piece. The width of the small finger 19 and the groove can be selected to control the width of the small paper piece, thereby producing pulp and paper of a predetermined size. One end of the hammer mother body 15 is provided with two pin holes 16 to prevent the finger hammer from shaking during operation, so that the small paper piece is more uniform. The thickness of the little finger 19 is less than the width of the working end face 17 of the hammer matrix 15, which is also the key technology for producing the intermittent feeding state and the key technology for solving the problem of uniform crushing of tailings. When working, the front corner of the working end face 17 of the hammer matrix 15 first touches the front edge of the paper sheet. Due to the first touch, the paper sheet breaks a groove, and then the multiple little fingers 19 tear the paper sheet. At this time, due to the long working end face 17, the paper sheet groove rides on the working end face 17, and the paper sheet is supported. After the working end face 17, feeding begins again, forming a working state of feeding, stopping, feeding, and stopping, effectively preventing large tailings. When the pressure of the pressure roller 13 is lost, all the tailings are fed into the crusher at the same time. The ratio of the thickness of the little finger 19 to the width of the working end face 17 of the hammer matrix 15 is between 1 / 2 and 1 / 5. When it is greater than 1 / 2, the bending drag increases, and the large tailings will be fed into the crusher at the same time. When it is less than 1 / 5, the service life of the little finger 19 is short. Through the vibrating screen 9, paper pieces can be discharged in time to avoid large pieces and fine powder. At the same time, the possibility of blocking the screen holes is eliminated to prevent fire. The vibrating screen 9 plays the role of the final safety insurance.

[0023] According to the above structure, a pulp and paper pulverizer is provided, which can produce sheet paper of various specifications, has uniform outer dimensions, has hand-tear effect, has fluff around, has no shear hard marks, has no fine powder in the finished product, can prevent screen blockage and fire, is easy to use and has a long service life.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change or modification made to the above embodiment based on the technical essence of the present invention belongs to the scope of the technical solution of the present invention.

Claims

1. A pulp and paper pulverizer, mainly comprising a feed inlet (1), a hammer (2), a rotor (3), a screen (9), a screen pressing frame (13), a discharge port (7), a machine body (8), and a motor (6), characterized in that: Two fixed knives (14) are arranged below the feed port (1). The disc of the rotor (3) is in the shape of giant teeth, and a knife holder is provided on the giant teeth, so that the arrangement of the front end faces of the hammer pieces (2) can be connected to form a seamless circumference on the end face of the rotor (3). In the axial plane of the rotor 3, the knife holders of the rotor (3) are evenly grouped, and the hammer pieces are finger hammer pieces (2).

2. A pulp and paper shredder according to claim 1, characterized in that One side of the feed inlet (1) is straight, and the other side is in the shape of an inclined bucket.

3. A pulp and paper shredder according to claim 1, characterized in that Two fixed knives (14) are arranged below the feed port (1) and are installed opposite to each other. The working angle of the fixed knives (14) is in an arc shape. The mounting hole of the fixed knives (14) is a waist hole, and the distance from the hammer (2) can be adjusted up and down.

4. A pulp and paper shredder according to claim 1, characterized in that A pressure wheel (13) is arranged above the fixed knife (14), and the pressure wheel (13) has a spring for adjusting the pressure.

5. A pulp and paper shredder according to claim 1, characterized in that The disc of the rotor (3) is in the shape of a giant tooth, and the giant teeth are equally divided into 8 parts. Each giant tooth is equipped with 2 groups of tool holders, each group has two holes, and a total of 4 holes. One group of holes is used to install the hammer (2), and the other group is a spare hole, and is also used for pulling out the pin rod when the adjacent group of hammers is replaced.

6. A pulp and paper shredder according to claim 1, characterized in that In the axial plane of the rotor (3), the rotor (3) tool holder is evenly divided into more than three groups.

7. A pulp and paper shredder according to claim 1, characterized in that The hammer piece is a finger hammer piece (2). Two pin holes (16) are provided at one end of the hammer piece mother body (15). The hammer piece mother body (15) is connected to the tool holder of the rotor (3) of the pulverizer by two pin rods. The other end is a working end face (17). The two corners of the working end face (17) are finger-shaped, without sharp corners and sharp edges, and are sintered by tungsten carbide to form an elliptical spherical shape with a rough friction surface. The working end face (17) has a groove in the middle, and a palm-type scraper (18) is welded in the groove. The front end of the palm-type scraper (18) has a uniform little finger (19). The two corners of the little finger (19) are elliptical spherical, without sharp corners and sharp edges, and are sintered by tungsten carbide to form a rough friction surface. There are uniform grooves between the little fingers (19), and the little fingers (19) and the grooves have the same width. The other end of the palm-type scraper (18) has a mounting groove, which is vertically embedded and welded with the groove in the middle of the working end face (17) of the hammer piece mother body (15).

8. A pulp and paper shredder according to claim 1, characterized in that The thickness of the little finger (19) of the hammer is smaller than the width of the working end surface (17) of the hammer body (15), and the ratio of the two is between 1 / 2 and 1 / 5.

9. A pulp and paper shredder according to claim 1, characterized in that Its screen (9) is installed on a screen pressing frame (5), a vibration motor (10) is arranged below the screen pressing frame (5), and the screen pressing frame (5) is separated from the machine body (8) by a spring vibration isolation device (20), so that the connected screen (9) and the screen pressing frame (5) can vibrate independently together.

10. A pulp and paper shredder according to claim 1, characterized in that Its finger hammer piece (2) and the screen (9) have a safe distance and will not collide with each other.

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