A kind of sulphidized fiber raw paper pulp coloring equipment and coloring method

Abstract

The application belongs to the technical field of papermaking, and particularly relates to a sulfide fiber raw paper pulp coloring equipment and a method thereof. The coloring equipment comprises a rack, a dyeing tank, an extrusion roller and a coloring roller set arranged on the rack. The coloring roller set is arranged on the discharge side of the extrusion roller. The coloring roller set comprises a driving shaft connected with a driving motor and a feeding roller sleeved on the driving shaft. The feeding roller has the freedom of rotation along the feeding direction of the raw paper pulp by means of the driving shaft. The surface of the feeding roller is arranged with discharge ports in a ring array with the axis as the center. The raw paper pulp passes through the gap between the feeding roller and a conveying belt. The discharge ports are inserted into the raw paper pulp and output dyes by the rotation of the feeding roller. The raw paper pulp is dyed from the inside to the outside by the coloring roller set. The discharge ports of the coloring roller set are inserted into the middle layer of the paper pulp, so that the dyes are directly sent into the paper pulp, and the paper pulp does not need to be soaked for a long time.

Description

Technical Field

[0001] This invention belongs to the field of papermaking technology, specifically relating to a coloring device and method for base paper pulp of sulfurized fibers. Background Technology

[0002] Currently, the coloring of raw paper pulp generally involves soaking the raw paper pulp in a dyeing tank for coloring. However, sulfurized fiber raw paper also needs to undergo a sulfurization step. Generally, sulfurization involves soaking the fibers in a sulfurizing solution. The sulfurization step is usually carried out before coloring to avoid the dyes used for color matching affecting the sulfurization effect of the pulp.

[0003] However, after sulfurization, the pulp fibers harden and expand, making it difficult for external dyes to penetrate into the pulp. Furthermore, the dyes cannot flow within the pulp and require soaking for several hours to penetrate. Insufficient soaking time will result in poor coloring effect inside the base paper, leading to low production efficiency of colored base paper. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a dyeing device and method for vulcanized fiber pulp. By adding a dyeing roller group, the outlet of the dyeing roller group is inserted into the middle layer of the pulp, thereby directly feeding the dye into the pulp without the need for prolonged soaking of the pulp.

[0005] The specific technical solution adopted in this invention is as follows: A dyeing device for raw paper pulp used in sulfurized fibers includes a frame and a dyeing tank and a pressing roller mounted on the frame. The raw paper pulp is discharged from the output end of the dyeing tank and passes through the pressing roller via a conveyor belt. The dyeing device also includes a dyeing roller assembly located on the discharge side of the pressing roller. The dyeing roller assembly includes a drive shaft connected to a drive motor and a feeding roller sleeved on the drive shaft. The feeding roller has the freedom to rotate along the feeding direction of the raw paper pulp via the drive shaft. The surface of the feeding roller has discharge ports arranged in a ring array around its axis. The raw paper pulp passes through the gap between the feeding roller and the conveyor belt. The discharge ports are inserted into the raw paper pulp by the rotation of the feeding roller and output dye. The raw paper pulp is dyed from the inside out by the dyeing roller assembly.

[0006] The discharge port of the feeding roller has a needle-like structure, and the dye inside the feeding roller seeps into the raw pulp along the needle tip of the inlet.

[0007] The coloring roller assembly also includes a vibrating screen mounted on the frame. The vibrating screen is located at the discharge end of the coloring roller assembly. The discharge end of the coloring roller assembly is connected to the inlet end of the dyeing tank via the vibrating screen. The dye inside the raw pulp is evenly diffused by the vibration generated by the vibrating screen.

[0008] The vibrating screen includes a support frame, a screen, a vibrating motor, a swing rod, and an eccentric rod. The screen is connected to the support frame via the swing rod, and the output end of the vibrating motor is eccentrically hinged to the swing rod via the eccentric rod. The swing rod reciprocates and drives the screen to vibrate via the vibrating motor.

[0009] The coloring roller group is provided in two sets, and the surface of the feeding roller is provided with multiple sets of discharge ports along the axial direction. The discharge ports of the two sets of coloring roller groups are arranged in a crisscross pattern along the feeding direction of the raw pulp.

[0010] The coloring roller assembly also includes a dye storage bin fixedly connected to the frame. The connecting side of the feeding roller is driven by a drive motor. An opening is provided at the center of the open side of the feeding roller. The side wall between the edge of the feeding roller and the opening prevents the dye in the feeding roller from flowing out. The conveying pipe of the dye storage bin enters the cavity of the feeding roller through the opening on the open side of the feeding roller.

[0011] The input end of the discharge port is also equipped with a metering component located inside the feeding roller. The metering component includes an intercepting rod, a lever, and an elastic membrane. The intercepting rod is arranged along the drive shaft direction, fixedly connected to the frame, and extends into the bottom of the feeding roller cavity along the opening of the feeding roller. The lever has an L-shaped structure, and the inflection point of the lever is hinged to the inner wall of the feeding roller by means of a coil spring. The elastic membrane is located at the input end of the discharge port, and a squeezing chamber is formed between the elastic membrane and the output end of the discharge port. The end of the lever is hooked to the elastic membrane. The intercepting rod intercepts the lever and drives the lever to rotate. The elastic membrane is lifted or collapsed by the rotation of the lever. The squeezing chamber is expanded or compressed by the expansion or collapse of the elastic membrane. The dye in the feeding roller penetrates through the elastic membrane into the squeezing chamber by the expansion and compression of the squeezing chamber and is discharged along the output end of the discharge port.

[0012] The outlet is also equipped with a one-way valve, which allows the dye to flow freely from inside the feeding roller.

[0013] A method for coloring base paper pulp for sulfurized fibers, the coloring method specifically includes the following steps: S1. The sulfurized raw paper pulp is immersed in the dyeing tank for 15-30 minutes. S2. After being soaked in dye, the raw pulp passes through the gap between the conveyor belt and the extrusion rollers. The raw pulp is squeezed out of water by the extrusion rollers to form pre-filtered water. S3. The pre-filtered pulp passes under the feeding roller. The discharge port of the feeding roller rotates with the feeding roller and inserts into the middle layer of the pulp. The dye of the feeding roller is fed into the interior of the pulp along the discharge port. S4. The raw pulp containing dye passes through a vibrating screen. The dye in the raw pulp diffuses and colors the surrounding area evenly with the help of the vibration generated by the vibrating screen. The raw pulp moves forward with the help of the vibration of the vibrating screen and is discharged along the discharge end of the vibrating screen.

[0014] The beneficial effects of this invention are: This invention includes an additional coloring roller assembly. The outlet of the coloring roller assembly is inserted into the middle layer of the pulp, thereby directly delivering the dye into the pulp without requiring prolonged soaking. Simultaneously, during the insertion process, the outlet presses down on the surface fibers of the pulp and interweaves them with the fibers of the middle layer. Since the surface fibers have absorbed excess pigment during soaking, they transfer the excess pigment to the middle layer fibers, which contain less dye. This results in a uniform distribution of dye between the surface and middle layers, improving the coloring effect.

[0015] The present invention also includes a vibrating screen, which allows the dye inside the pulp to diffuse evenly with the help of vibration. The vibration of the vibrating screen causes the dye in the dye-rich area of ​​the pulp to spread rapidly to the surrounding area, thereby making the dye evenly distributed, shortening the dyeing time and improving the coloring effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the front structure of the coloring roller assembly; Figure 4 This is a schematic diagram of the metering component when the discharge port is closed; Figure 5 A schematic diagram of the metering component when the discharge port is open; Figure 6 for Figure 4 An enlarged schematic diagram of part A in the middle; Figure 7 for Figure 5 Enlarged schematic diagram of part B; In the attached diagram, 1 is the frame, 2 is the dyeing tank, 3 is the extrusion roller, 4 is the conveyor belt, 5 is the drive motor, 6 is the drive shaft, 7 is the feeding roller, 8 is the discharge port, 9 is the support frame, 10 is the screen, 11 is the vibrating motor, 12 is the swing arm, 13 is the eccentric rod, 14 is the dye storage bin, 15 is the conveying pipe, 16 is the intercepting rod, 17 is the lever, 18 is the elastic membrane, 19 is the coil spring, 20 is the one-way valve, 21 is the water collection tank, and 22 is the water inlet tank. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Specific embodiments, such as Figure 1-7 As shown, the present invention provides a coloring device for raw paper pulp for sulfurized fibers, including a frame 1 and a dyeing tank 2 and a pressing roller 3 disposed on the frame 1. The raw paper pulp is discharged from the output end of the dyeing tank 2 and passes through the pressing roller 3 by means of a conveyor belt 4. The coloring device is further provided with a coloring roller group, which is located on the discharge side of the pressing roller 3. The coloring roller group includes a drive shaft 6 driven and connected to a drive motor 5 and a feeding roller 7 sleeved on the drive shaft 6. The feeding roller 7 has the freedom to rotate along the feeding direction of the raw paper pulp by means of the drive shaft 6. The surface of the feeding roller 7 is arranged with discharge ports 8 in a ring array around the axis. The raw paper pulp passes through the gap between the feeding roller 7 and the conveyor belt 4. The discharge ports 8 are inserted into the raw paper pulp by means of the rotation of the feeding roller 7 and output dye. The raw paper pulp is dyed from the inside out by means of the coloring roller group.

[0018] Because the pulp fibers harden and expand after sulfurization, it becomes difficult for external dyes to penetrate into the pulp, and the dyes also have difficulty flowing within the pulp. It takes several hours of soaking for the dyes to penetrate into the pulp. Insufficient soaking time will result in poor coloring effect inside the base paper, leading to low production efficiency of colored base paper.

[0019] Therefore, a coloring roller assembly is added to this invention, such as... Figure 4 As shown, the dotted line represents the raw pulp. The dye is directly fed into the pulp by inserting the outlet 8 of the coloring roller assembly into the middle layer of the pulp, eliminating the need for prolonged soaking. During the insertion process, the outlet 8 also presses down on the surface fibers of the pulp and interweaves them with the fibers of the middle layer. Since the surface fibers have absorbed excess pigment during soaking, they transfer the excess pigment to the middle layer fibers, which contain less dye. This results in a uniform distribution of dye between the surface and middle layers, improving the coloring effect.

[0020] like Figure 1-7 As shown, the discharge port 8 of the feeding roller 7 has a needle-like structure. The dye inside the feeding roller 7 penetrates into the raw pulp along the needle tip of the inlet. The needle-like structure can more easily penetrate into the middle layer of the pulp, while reducing damage to the surface morphology of the pulp.

[0021] like Figure 1-2 As shown, the coloring roller group also includes a vibrating screen mounted on the frame 1. The vibrating screen is located at the discharge end of the coloring roller group. The discharge end of the coloring roller group is connected to the inlet end of the dyeing tank 2 via the vibrating screen. The dye inside the raw pulp is evenly diffused by the vibration formed by the vibrating screen. Through the vibration of the vibrating screen, the dye in the dye-rich area on the raw pulp is rapidly diffused to the surrounding area, thereby making the dye evenly distributed, shortening the dyeing time, and improving the coloring effect.

[0022] like Figure 1-2 As shown, the vibrating screen includes a support frame 9, a screen 10, a vibrating motor 11, a swing rod 12, and an eccentric rod 13. The screen 10 is connected to the support frame 9 via the swing rod 12. The output end of the vibrating motor 11 is eccentrically hinged to the swing rod 12 via the eccentric rod 13. The swing rod 12 reciprocates and drives the screen 10 to vibrate via the vibrating motor 11.

[0023] like Figure 1-2 As shown, the coloring roller group is provided in two sets. The surface of the feeding roller 7 is provided with multiple sets of discharge ports 8 along the axial direction. The discharge ports 8 of the two sets of coloring roller groups are arranged in a crisscross pattern along the feeding direction of the raw pulp. The two sets of coloring roller groups arranged in a crisscross pattern can inject dye into the raw pulp more densely and use a vibrating screen to even out the color, thereby improving the coloring efficiency and quality. In addition, the rotation direction of the feeding roller 7 is the same as the feeding direction of the raw pulp, so as to avoid the discharge ports 8 from pushing the raw pulp in the opposite direction and affecting the structure of the raw pulp.

[0024] like Figure 1 and Figure 3 As shown, the coloring roller assembly also includes a dye storage bin 14 fixedly connected to the frame 1. The connecting side of the feeding roller 7 is driven by the drive motor 5. An opening is provided at the center of the open side of the feeding roller 7. The side wall between the edge of the feeding roller 7 and the opening prevents the dye in the feeding roller 7 from flowing out. The conveying pipe 15 of the dye storage bin 14 enters the cavity of the feeding roller 7 through the opening on the open side of the feeding roller 7. Since the conveying speed of the conveyor belt 4 is relatively slow, the rotation speed of the feeding roller 7 is also relatively slow. The feeding roller 7 always rotates at a uniform speed, and the dye in the feeding roller 7 will not produce large fluctuations. Thus, the dye inside the feeding roller 7 will not spill out along the opening. The dye storage bin 14 always replenishes the feeding roller 7, and the dye conveying rate is the same as the sum of the dye output rates of each outlet 8 of the feeding roller 7, ensuring that there is always dye in the feeding roller 7 to be supplied to the outlet 8.

[0025] like Figure 1 and 3As shown in Figure 7, the input end of the discharge port 8 is also provided with a metering component located inside the feeding roller 7. The metering component includes an intercepting rod 16, a lever 17, and an elastic membrane 18. The intercepting rod 16 is arranged along the drive shaft 6, fixedly connected to the frame 1, and extends into the bottom of the cavity of the feeding roller 7 along the opening of the feeding roller 7. The lever 17 has an L-shaped structure, and the inflection point of the lever 17 is hinged to the inner wall of the feeding roller 7 by means of a coil spring 19. The elastic membrane 18 is located at the discharge port 8. At the input end, an extrusion chamber is formed between the elastic membrane 18 and the output end of the discharge port 8. The end of the lever 17 is hooked and connected to the elastic membrane 18. The intercepting rod 16 intercepts the lever 17 and drives the lever 17 to rotate. The elastic membrane 18 is lifted or collapsed by the rotation of the lever 17. The extrusion chamber is expanded or compressed by the lifting or collapse of the elastic membrane 18. The dye in the feeding roller 7 penetrates the elastic membrane 18 into the extrusion chamber by the expansion and compression of the extrusion chamber and is discharged along the output end of the discharge port 8.

[0026] In order to prevent dye from splashing out of the discharge port 8 during the rolling of the feeding roller 7, and to ensure that only the discharge port 8 inserted into the pulp discharges, a metering component is also provided in this invention. When the discharge port 8 is in a higher position, such as Figure 4 and Figure 6 As shown, when the discharge port 8 has not yet been inserted into the pulp, the lever 17 corresponding to the discharge port 8 has not yet passed the intercepting lever 16. Therefore, under the action of the coil spring 19, the hook end of the lever 17 presses the elastic membrane 18 and puts the extrusion chamber in a compressed state. The pressure in the extrusion chamber is higher than the pressure in the feeding roller 7, preventing dye from entering the extrusion chamber. When the discharge port 8 is in a lower position, such as Figure 5 and Figure 7 As shown, when the discharge port 8 is inserted into the pulp, the lever 17 corresponding to the discharge port 8 is passing the intercepting bar 16. The lever 17 is intercepted by the intercepting bar 16. Since the lever 17 is hinged to the inner wall of the feeding roller 7, the lever 17 will rotate and drive the hook end of the lever 17 to lift the elastic membrane 18. At this time, the volume of the extrusion chamber gradually expands, and the pressure in the extrusion chamber decreases, so that the pressure in the extrusion chamber is less than the pressure in the feeding roller 7, and the dye enters the extrusion chamber. When the discharge port 8 is at its lowest point and rises again, as the swing angle of the lever 17 increases, the lever 17 will gradually pass under the intercepting bar 16 and disengage. The hook end of the lever 17 presses the elastic membrane 18 again and puts the extrusion chamber in a compressed state. The pressure in the extrusion chamber gradually increases. Since the elastic membrane 18 is a one-way membrane, the dye can only be discharged outward along the discharge port 8. At the same time, the dye in the feeding roller 7 stops entering the extrusion chamber.

[0027] The output end of the discharge port 8 is also equipped with a one-way valve 20. The dye has the freedom to flow out from inside the feed roller 7 with the help of the one-way valve 20. The elastic membrane 18 is also equipped with a one-way valve. The one-way valve and the one-way valve 20 on the elastic membrane 18 can prevent the dye from flowing back. At the same time, it ensures that the dye can always be discharged in the direction of feed roller 7 → extrusion chamber → output end of discharge port 8 during the expansion and contraction of the extrusion chamber, and will not flow in reverse.

[0028] Other examples Figure 1 As shown, a water collection tank 21 is also provided below the frame 1 to collect the filtered water and dye. A water inlet trough 22 is provided below the screen 10 of the vibrating screen. The surface of the water inlet trough 22 is inclined along the discharge direction. Water is introduced into the water collection tank 21 through the water inlet trough 22 to prevent water from dripping into the vibrating motor 11 and causing a short circuit. The motor of the conveyor belt 4 is located on the side and will not cause this problem.

[0029] The present invention also provides a method for coloring sulfurized fiber base paper pulp, specifically including the following steps: S1. The sulfurized raw paper pulp is immersed in dyeing tank 2 for 15-30 minutes. S2. The raw pulp after dye soaking passes through the gap between the conveyor belt 4 and the extrusion roller 3 by the conveyor belt 4. The raw pulp squeezes out water by the extrusion roller 3 to form pre-filtered water. S3. The pre-filtered pulp passes under the feed roller 7. The discharge port 8 of the feed roller 7 rotates with the feed roller 7 and inserts into the middle layer of the pulp. The dye of the feed roller 7 is fed into the interior of the pulp along the discharge port 8. S4. The raw pulp containing dye passes through a vibrating screen. The dye in the raw pulp diffuses and colors the surrounding area evenly with the help of the vibration generated by the vibrating screen. The raw pulp moves forward with the help of the vibration of the vibrating screen and is discharged along the discharge end of the vibrating screen.

[0030] In this invention, after the raw pulp is soaked, it is first pre-pressed using extrusion roller 3. Since the dye contains a large amount of water, and the colored substances in the dye have a better adhesion to the fiber than the water, the extrusion process mainly removes the water. After the raw pulp is drained, it can better combine with the dye that has penetrated into the intermediate layer of the coloring roller group during the coloring process, thereby improving the coloring effect and also playing a pre-forming role.

Claims

1. A pulp coloring device for sulfurized fiber base paper, comprising a frame (1) and a dyeing tank (2) and a squeeze roller (3) disposed on the frame (1), wherein the base paper pulp is discharged from the output end of the dyeing tank (2) and passes through the squeeze roller (3) by means of a conveyor belt (4), characterized in that, The coloring equipment is further provided with a coloring roller group, which is located on the discharge side of the extrusion roller (3). The coloring roller group includes a drive shaft (6) connected to the drive motor (5) and a feeding roller (7) sleeved on the drive shaft (6). The feeding roller (7) has the freedom to rotate along the feeding direction of the raw pulp by means of the drive shaft (6). The surface of the feeding roller (7) is provided with discharge ports (8) in a ring array with the axis as the center. The raw pulp passes through the gap between the feeding roller (7) and the conveyor belt (4). The discharge ports (8) are inserted into the raw pulp by means of the rotation of the feeding roller (7) and output dye. The raw pulp is dyed from the inside out by means of the coloring roller group. The discharge port (8) of the feeding roller (7) has a needle-like structure, and the dye inside the feeding roller (7) seeps into the raw pulp along the needle tip of the discharge port (8); The coloring roller group also includes a vibrating screen set on the frame (1). The vibrating screen is located at the discharge end of the coloring roller group. The discharge end of the coloring roller group is connected to the inlet end of the dyeing tank (2) by means of the vibrating screen. The dye inside the raw pulp is evenly diffused by means of the vibration formed by the vibrating screen. The coloring roller assembly also includes a dye storage bin (14) fixedly connected to the frame (1). The connecting side of the feeding roller (7) is connected to the drive motor (5). The center of the open side of the feeding roller (7) is provided with an opening. The conveying pipe of the dye storage bin (14) enters the cavity of the feeding roller (7) along the opening on the open side of the feeding roller (7). The input end of the discharge port (8) is also provided with a metering component located inside the feeding roller (7). The metering component includes an intercepting rod (16), a lever (17), and an elastic membrane (18). The intercepting rod (16) is arranged along the drive shaft (6), and is fixedly connected to the frame and extends into the bottom of the cavity of the feeding roller (7) along the opening of the feeding roller (7). The lever (17) has an L-shaped structure, and the inflection point of the lever (17) is hinged to the inner wall of the feeding roller (7) by means of a coil spring (19). The elastic membrane (18) is located at the discharge port (8). At the input end, an extrusion chamber is formed between the elastic membrane (18) and the output end of the discharge port (8). The end of the lever (17) is hooked to the elastic membrane (18). The intercepting rod (16) intercepts the lever (17) and drives the lever (17) to rotate. The elastic membrane (18) is lifted or collapsed by the rotation of the lever (17). The extrusion chamber is bulged or compressed by the lifting or collapse of the elastic membrane (18). The dye in the feeding roller (7) penetrates the elastic membrane (18) into the extrusion chamber by the bulging and compression of the extrusion chamber and is discharged along the output end of the discharge port (8).

2. The equipment for coloring base paper pulp for sulfurized fiber base paper according to claim 1, characterized in that, The vibrating screen includes a support frame (9), a screen (10), a vibrating motor (11), a swing rod (12), and an eccentric rod (13). The screen (10) is connected to the support frame (9) via the swing rod (12). The output end of the vibrating motor (11) is eccentrically hinged to the swing rod (12) via the eccentric rod (13). The swing rod (12) reciprocates and drives the screen (10) to vibrate via the vibrating motor (11).

3. The equipment for coloring base paper pulp for sulfurized fiber base paper according to claim 1, characterized in that, The coloring roller group is provided in two sets. The surface of the feeding roller (7) is provided with multiple sets of discharge ports (8) along the axial direction. The discharge ports (8) of the two sets of coloring roller groups are arranged in a crisscross pattern along the feeding direction of the raw pulp.

4. The equipment for coloring pulp for vulcanized fiber base paper according to claim 1, characterized in that, The outlet (8) is also equipped with a one-way valve (20), which allows the dye to flow out of the feed roller (7) from the inside with the help of the one-way valve (20).

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