A pulp filtering device for papermaking with multi-fiber raw material

Abstract

This invention discloses a pulp filtration device for multi-fiber raw materials used in papermaking, comprising: a filter tube, wherein a filter element for filtering the pulp is disposed inside the filter tube, and a collection element for collecting the filtered impurities is disposed on the filter tube; in this invention, through the coordinated cooperation of the filter plate, rotating shaft, rotating rod, mounting rod, activation plate, and scraper of the filter element, efficient and uniform filtration of the pulp can be achieved. Self-cleaning is driven by the flow dynamics of the pulp, requiring no additional energy consumption. The blade design of the scraper can thoroughly remove impurities from the filter plate, preventing clogging of the filter holes. The filter plate and filter tube have the same cross-sectional dimensions, ensuring no filtration is missed, significantly improving filtration quality and continuity, and reducing manual maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of pulp filtration equipment technology, specifically a pulp filtration device for multi-fiber raw materials used in papermaking. Background Technology

[0002] Paper pulp is the core raw material in the papermaking industry, mainly composed of plant fibers, a small amount of fillers, and other auxiliary components. Its purity and cleanliness directly determine the strength, smoothness, and appearance quality of the final paper. Pulp filtration is one of the key processes in papermaking, primarily used to remove impurities, fiber debris, and other foreign matter from the pulp, ensuring a uniform pulp texture and providing qualified raw materials for subsequent pulping and papermaking processes. It also reduces equipment wear and ensures smooth production flow, making it a crucial link in improving paper product quality and increasing production efficiency. The quality of pulp filtration directly affects the production efficiency and product competitiveness of papermaking enterprises; therefore, efficient and stable pulp filtration equipment is of great significance in the papermaking industry. In practical applications, existing pulp filtration equipment still has room for improvement in terms of the uniformity and efficiency of filtration. Impurity removal usually requires additional power or manual assistance, which not only increases energy consumption but also increases the workload of manual maintenance. At the same time, some equipment has the problem of incomplete filtration, making it difficult to fully remove impurities from the pulp, which may affect the quality of subsequent paper products. Furthermore, the filtration efficiency is prone to decline after long-term use, failing to meet the requirements of continuous and stable filtration for large-scale paper production. It is also difficult to balance filtration quality, energy consumption control, and ease of maintenance. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing pulp filtration equipment in practical applications, such as the lack of room for improvement in filtration uniformity and efficiency. Impurity removal typically requires additional power or manual assistance, increasing energy consumption and maintenance workload. Furthermore, some equipment suffers from incomplete filtration, failing to adequately remove impurities from the pulp, potentially affecting the quality of subsequent paper products. Long-term use also leads to a decline in filtration efficiency, failing to meet the demands of large-scale paper production for continuous and stable filtration. The invention also addresses the challenge of balancing filtration quality, energy consumption control, and ease of maintenance. Therefore, this invention provides a pulp filtration device for multi-fiber raw materials used in papermaking.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pulp filtration device for multi-fiber raw materials used in papermaking, comprising: a filter tube, wherein a filter element for filtering the pulp is disposed inside the filter tube, and a collection element for collecting the filtered impurities is disposed on the filter tube; The filter element includes a filter plate fixedly connected to the filter tube. A rotating shaft is provided through the filter plate and is rotatably connected to the filter plate. A rotating rod is fixedly connected to one end of the rotating shaft. An installation rod is fixedly connected to the end face of the rotating rod away from the filter plate. An activation plate is fixedly connected to the outer circular surface of the installation rod. A scraper is fixedly connected to the outer circular surface of the rotating rod.

[0005] As a further embodiment of the present invention: the filter plate has the same internal cross-sectional dimensions as the filter tube, and the filter plate is provided with a through filter hole, and multiple sets of filter holes are provided, and the multiple sets of filter holes are evenly distributed on the filter plate.

[0006] As a further embodiment of the present invention: the rotating shaft is located at the center of the filter plate, the rotating shaft is I-shaped, and the two sides of the rotating shaft are flush with the two sides of the filter plate.

[0007] As a further embodiment of the present invention: the mounting rod is conical on the side away from the filter plate, the activation plate is a spiral blade, and three sets of activation plates are evenly distributed on the outer surface of the mounting rod.

[0008] As a further embodiment of the present invention: the scraper abuts against the filter plate on the side facing the mounting rod, the scraper is provided in three sets, evenly distributed on the outer circle surface of the rotating rod, the scraper is arc-shaped, the cross-section of the scraper is triangular and the inclined surface faces upward, and a cutting edge is provided at the angle between the contact surface of the scraper and the filter plate and the inclined surface.

[0009] As a further embodiment of the present invention: the collecting component includes a connecting groove at the bottom of the filter tube, one side of the connecting groove is flush with the side of the filter plate facing the mounting rod, a connecting collar is fixedly connected to the outer circular surface of the filter tube, the outer circular surface of the connecting collar is provided with a threaded groove, two sets of connecting collars are provided, symmetrically distributed on both sides of the connecting groove, the two sets of connecting collars have different lengths, and one side of each set of connecting collars is flush with the two sides of the inside of the connecting groove.

[0010] As a further embodiment of the present invention: the outer circular surface of the connecting collar is threaded with a collection box, the collection box is O-shaped, the opening of the collection box faces the filter tube, the bottom end of the collection box is a slope, and the lower part of the slope faces the filter tube, and the collection box is connected to the connecting groove.

[0011] As a further embodiment of the present invention: a rotating groove is formed on the outer circular surface of the filter tube, the rotating groove is convex in shape, the rotating groove is disposed between two sets of connecting collars, and the area of ​​the filter tube located between the two sets of connecting collars is also provided with filter holes, there are multiple sets of filter holes, and the multiple sets of filter holes are evenly distributed in the area of ​​the filter tube located between the two sets of connecting collars, a rotating ring is rotatably connected in the rotating groove, and a scraper is fixedly connected to the outside of the rotating ring, the scraper is arc-shaped and fits against the outer circular surface of the filter tube, and the scraper has beveled angles on both sides.

[0012] As a further embodiment of the present invention: a magnetic block is embedded on the side of the scraper facing the inner wall of the filter tube, and a magnetic block is also embedded on the side of the scraper facing the outer circular surface of the filter tube, with the corresponding surfaces of the two sets of magnetic blocks having opposite poles.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the filter plate, rotating shaft, rotating rod, mounting rod, activation plate, and scraper of the filter element work together to achieve efficient and uniform filtration of pulp. The self-cleaning is driven by the flow of pulp, requiring no additional energy consumption. The blade design of the scraper can thoroughly remove impurities from the filter plate and prevent filter hole blockage. The filter plate and filter tube have the same cross-sectional dimensions to ensure no filtration is missed, greatly improving filtration quality and continuity, and reducing manual maintenance costs. 2. In this invention, the connecting groove, connecting collar, collection box, rotating groove, rotating ring, scraper and magnetic block of the collection component can quickly collect and filter impurities. The threaded connection of the collection box makes it easy to disassemble and clean. The inclined surface at the bottom is conducive to the accumulation of impurities. The scraper and scraper move synchronously to clean the filter holes on the outer circle of the filter tube, realize the smoothness of secondary filtration, further improve the filtration effect, and ensure the long-term stable operation of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure in this invention; Figure 3 This is a schematic diagram of the filter element in this invention; Figure 4 In this invention Figure 3 A schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the connecting groove in this invention; Figure 6 In this invention Figure 5 A schematic diagram of the structure at point B; Figure 7 This is a schematic diagram of the rotating ring structure in this invention; Figure 8 In this invention Figure 7 A schematic diagram of the structure at point C.

[0015] In the diagram: 1. Filter tube; 2. Filter element; 21. Filter plate; 22. Rotating shaft; 23. Rotating rod; 24. Mounting rod; 25. Activation plate; 26. Scraper; 3. Collector; 31. Connecting groove; 32. Connecting collar; 33. Collection box; 34. Rotating groove; 35. Rotating ring; 36. Scraper block. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0018] Reference Figures 1 to 2 In this embodiment of the invention, a pulp filtration device for multi-fiber raw materials for papermaking includes: a filter tube 1, a filter element 2 for filtering the pulp is provided inside the filter tube 1, and a collection element 3 for collecting the filtered impurities is provided on the filter tube 1.

[0019] Reference Figures 3 to 4The filter element 2 includes a filter plate 21 fixedly connected to the filter tube 1. A rotating shaft 22 is provided through the filter plate 21 and is rotatably connected to the filter plate 21. A rotating rod 23 is fixedly connected to one end of the rotating shaft 22. An installation rod 24 is fixedly connected to the end face of the rotating rod 23 away from the filter plate 21. An activation plate 25 is fixedly connected to the outer surface of the installation rod 24. A scraper 26 is fixedly connected to the outer surface of the rotating rod 23. The filter plate 21 has the same internal cross-sectional dimensions as the filter tube 1. Filter holes are provided through the filter plate 21. Multiple sets of filter holes are provided and evenly distributed on the filter plate 21. The rotating shaft 22 is located at the center of the filter plate 21. The rotating shaft 22 is I-shaped, and both sides of the rotating shaft 22 are flush with the two sides of the filter plate 21. The mounting rod 24 is tapered on the side away from the filter plate 21. The activation plate 25 has spiral blades. There are three sets of activation plates 25, which are evenly distributed on the outer surface of the mounting rod 24. The scraper 26 abuts against the side of the filter plate 21 facing the mounting rod 24. There are three sets of scrapers 26, which are evenly distributed on the outer surface of the rotating rod 23. The scraper 26 is arc-shaped, and the cross-section of the scraper 26 is triangular with the inclined surface facing upward. A cutting edge is provided at the angle between the contact surface of the scraper 26 and the filter plate 21 and the inclined surface.

[0020] The above scheme achieves comprehensive and uniform filtration of pulp by using filter plate 21 with the same internal cross-sectional dimensions as filter tube 1 and multiple sets of evenly distributed filter holes, thus avoiding insufficient filtration in certain areas. The rotating shaft 22, located at the center of filter plate 21 and in an I-shape, ensures the stability of the rotating shaft 22 during rotation and is flush with both sides of filter plate 21 without affecting pulp flow. The mounting rod 24, which is tapered on the side away from filter plate 21, reduces pulp flow resistance. Three sets of evenly distributed spiral activation plates 25 can be driven to rotate by the pulp flow force without additional power. Three sets of evenly distributed arc-shaped scrapers 26 abut against filter plate 21, and the scraper 26 has a triangular cross-section with cutting edges, which can efficiently scrape away impurities on the surface of filter plate 21, prevent filter hole blockage, and ensure stable filtration efficiency.

[0021] Reference Figures 5 to 8The collecting component 3 includes a connecting groove 31 at the bottom of the filter tube 1. One side of the connecting groove 31 is flush with the side of the filter plate 21 facing the mounting rod 24. A connecting collar 32 is fixedly connected to the outer surface of the filter tube 1. The outer surface of the connecting collar 32 has a threaded groove. Two sets of connecting collars 32 are symmetrically distributed on both sides of the connecting groove 31. The two sets of connecting collars 32 have different lengths. One side of each set of connecting collars 32 is flush with the inner sides of the connecting groove 31. A collecting box 33 is threadedly connected to the outer surface of the connecting collar 32. The collecting box 33 is O-shaped, with its opening facing the filter tube 1. The bottom of the collecting box 33 is sloped, with the lower part of the slope facing the filter tube 1. The collecting box 33 communicates with the connecting groove 31, filtering... A rotating groove 34 is provided on the outer circular surface of the tube 1. The rotating groove 34 is convex in shape and is located between two sets of connecting collars 32. The filter tube 1 is also provided with filter holes in the area between the two sets of connecting collars 32. Multiple sets of filter holes are provided and are evenly distributed in the area between the two sets of connecting collars 32 of the filter tube 1. A rotating ring 35 is rotatably connected in the rotating groove 34. A scraper block 36 is fixedly connected to the outside of the rotating ring 35. The scraper block 36 is arc-shaped and fits against the outer circular surface of the filter tube 1. The scraper block 36 has beveled angles on both sides. A magnetic block is embedded on the side of the scraper 26 facing the inner wall of the filter tube 1. A magnetic block is also embedded on the side of the scraper block 36 facing the outer circular surface of the filter tube 1. The corresponding surfaces of the two sets of magnetic blocks are opposite poles.

[0022] The above solution is adopted as follows: By aligning one side of the connecting groove 31 with the side of the filter plate 21 facing the mounting rod 24, the impurities scraped by the scraper 26 can smoothly enter the connecting groove 31, avoiding impurity accumulation. Through two sets of connecting rings 32 of different lengths symmetrically distributed on both sides of the connecting groove 31, with one side aligned with both sides of the connecting groove 31, and in conjunction with the threaded groove on the outer surface, the collection box 33 can be stably installed and easily disassembled. By having the O-shaped collection box 33 with its opening facing the filter tube 1 and its bottom beveled so that the lower part faces the filter tube 1, impurities can be quickly collected, facilitating subsequent cleaning. The rotating ring 35 in the convex rotating groove 34 drives the arc-shaped scraper 36 to fit against the outer surface of the filter tube 1, and with the beveled angles on both sides, impurities in the filter holes on the outer surface of the filter tube 1 can be cleaned. Two sets of opposite polarity magnetic blocks make the scraper 26 and the scraper 36 move synchronously, improving cleaning efficiency and ensuring smooth filtration.

[0023] The working principle of this invention is as follows: When using this pulp filtration device for multi-fiber raw materials used in papermaking, the device is first installed on the pulp conveying path of the papermaking production line to ensure that the pulp can flow smoothly from one end of the filter tube 1 and out the other end. After the production line is started, the pulp continuously flows in from the feed end of the filter tube 1. When the pulp flows through the filter element 2, multiple sets of evenly distributed filter holes on the filter plate 21 will filter the pulp, intercepting multi-fiber impurities, debris, etc. in the pulp on the side of the filter plate 21 facing the mounting rod 24. The filtered pure pulp continues to flow through the filter holes to the discharge end of the filter tube 1, completing the preliminary filtration operation. During the pulp flow, the pulp will continuously impact the three sets of spiral activation plates 25 on the outer surface of the mounting rod 24. The movable plate 25 is spiral-shaped and evenly distributed. The impact force of the pulp is converted into the power to drive the mounting rod 24 to rotate. The mounting rod 24 drives the rotating rod 23, which is fixedly connected to it, to rotate around the rotating shaft 22. The rotating shaft 22 is located at the center of the filter plate 21 and is I-shaped, which can ensure the stability of the rotation process. The two sides of the rotating shaft 22 are flush with the two sides of the filter plate 21, so as not to obstruct the flow of pulp. When the rotating rod 23 rotates, the three sets of arc-shaped scrapers 26 fixedly connected to its outer circular surface will rotate synchronously. The scrapers 26 are in close contact with the side of the filter plate 21 facing the mounting rod 24. The scraper 26 has a triangular cross section and a cutting edge at the angle between the contact surface and the inclined surface, which can efficiently scrape away the impurities intercepted on the surface of the filter plate 21, prevent impurities from clogging the filter holes, and thus ensure the filtration efficiency. The flow rate remains stable, eliminating the need for manual cleaning of the filter plate 21 in real time. Impurities intercepted on the surface of the filter plate 21 are pushed into the connecting groove 31 as the scraper 26 rotates, preventing them from accumulating below the filter plate 21. The connecting groove 31 is connected to the collection box 33, allowing impurities to enter the O-shaped collection box 33 through the connecting groove 31. The bottom of the collection box 33 is sloped, with the lower end facing the filter tube 1, guiding impurities and pulp mixed in with them towards the area between the two sets of connecting rings 32 in the filter tube 1. This allows the pulp in the collection box 33 to flow back into the filter tube 1 through the filter holes located between the two sets of connecting rings 32. Simultaneously, the magnetic block embedded on the side of the scraper 26 facing the inner wall of the filter tube 1 is opposite to the magnetic block embedded on the side of the scraper 36 facing the outer surface of the filter tube 1. When the scraper 26 rotates with the rotating rod 23, under the attraction of the opposite-polarity magnetic block, it will drive the rotating ring 35 in the rotating groove 34 to rotate synchronously. The rotating ring 35 drives the arc-shaped scraper 36 fixedly connected to the outside to rotate. The scraper 36 is in close contact with the outer circular surface of the filter tube 1, and has beveled edges on both sides, which can efficiently scrape away impurities on the surface of the filter holes in the area between the two sets of connecting collars 32 of the filter tube 1, avoid clogging of the filter holes in this area, and ensure the smoothness of secondary filtration. When the impurities in the collection box 33 accumulate to a certain amount, the pulp conveying can be stopped, the collection box 33 can be unscrewed, and the accumulated impurities inside can be cleaned. After cleaning, the collection box 33 can be reinstalled and fixed through the threaded groove of the connecting collar 32, and the device can be restarted for filtration.The entire filtration process requires no additional power to drive the cleaning mechanism. The self-cleaning of the filter plate 21 and the filter holes on the outer surface of the filter tube 1 is achieved solely by the flow of the pulp itself. This not only saves energy but also reduces manual cleaning workload, improving the continuity and efficiency of the filtration operation. Simultaneously, the synergistic effect of the filter element 2 and the collecting element 3 effectively improves the quality of pulp filtration, preventing impurities from affecting subsequent papermaking processes. Through the coordinated operation of the filter plate 21, rotating shaft 22, rotating rod 23, mounting rod 24, activation plate 25, and scraper 26 in the filter element 2, efficient and uniform pulp filtration is achieved. The self-cleaning is driven by the flow of the pulp, requiring no additional energy. The blade design of plate 26 thoroughly removes impurities from filter plate 21, preventing filter hole blockage. The cross-sectional dimensions of filter plate 21 are identical to those of filter tube 1, ensuring no filtration is missed, significantly improving filtration quality and continuity, and reducing manual maintenance costs. Through the cooperation of the connecting groove 31, connecting collar 32, collection box 33, rotating groove 34, rotating ring 35, scraper 36, and magnetic block in the collection component 3, filtered impurities can be quickly collected. The threaded connection of collection box 33 facilitates disassembly and cleaning, and the beveled bottom end promotes impurity accumulation. The scraper 36 operates synchronously with scraper plate 26, cleaning the filter holes on the outer surface of filter tube 1, achieving smooth secondary filtration, further improving the filtration effect, and ensuring long-term stable operation of the device.

[0024] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pulp filtration device for multi-fiber raw materials used in papermaking, comprising: The filter tube (1) is characterized in that a filter element (2) for filtering pulp is provided inside the filter tube (1), and a collection element (3) for collecting the filtered impurities is provided on the filter tube (1). The filter element (2) includes a filter plate (21) fixedly connected to the filter tube (1). A rotating shaft (22) is provided through the filter plate (21) and is rotatably connected to the filter plate (21). A rotating rod (23) is fixedly connected to one end of the rotating shaft (22). An installation rod (24) is fixedly connected to the end face of the rotating rod (23) away from the filter plate (21). An activation plate (25) is fixedly connected to the outer surface of the installation rod (24). A scraper (26) is fixedly connected to the outer surface of the rotating rod (23).

2. The pulp filtration device for multi-fiber raw materials used in papermaking according to claim 1, characterized in that, The filter plate (21) has the same internal cross-sectional dimensions as the filter tube (1). The filter plate (21) has a through-hole. There are multiple sets of filter holes, and the multiple sets of filter holes are evenly distributed on the filter plate (21).

3. A pulp filtration device for multi-fiber raw materials used in papermaking according to claim 2, characterized in that, The rotating shaft (22) is located at the center of the filter plate (21). The rotating shaft (22) is I-shaped, and the two sides of the rotating shaft (22) are flush with the two sides of the filter plate (21).

4. A pulp filtration device for multi-fiber raw materials used in papermaking according to claim 3, characterized in that, The mounting rod (24) is tapered on the side away from the filter plate (21), and the activation plate (25) is a spiral blade. The activation plate (25) is provided in three sets, which are evenly distributed on the outer surface of the mounting rod (24).

5. A pulp filtration device for multi-fiber raw materials used in papermaking according to claim 4, characterized in that, The scraper (26) abuts against the filter plate (21) on the side facing the mounting rod (24). There are three sets of scrapers (26), which are evenly distributed on the outer surface of the rotating rod (23). The scraper (26) is arc-shaped and has a triangular cross-section with the inclined surface facing upward. A cutting edge is provided at the angle between the contact surface of the scraper (26) and the filter plate (21) and the inclined surface.

6. A pulp filtration device for multi-fiber raw materials used in papermaking according to claim 5, characterized in that, The collecting component (3) includes a connecting groove (31) at the bottom of the filter tube (1). One side of the inside of the connecting groove (31) is flush with the side of the filter plate (21) facing the mounting rod (24). A connecting collar (32) is fixedly connected to the outer surface of the filter tube (1). The outer surface of the connecting collar (32) is provided with a threaded groove. Two sets of connecting collars (32) are provided, symmetrically distributed on both sides of the connecting groove (31). The two sets of connecting collars (32) have different lengths. One side of each set of connecting collars (32) is flush with the two sides inside the connecting groove (31).

7. A pulp filtration device for multi-fiber raw materials used in papermaking according to claim 6, characterized in that, The outer circular surface of the connecting collar (32) is threaded with a collection box (33). The collection box (33) is O-shaped. The opening of the collection box (33) faces the filter tube (1). The bottom of the collection box (33) is a slope, and the lower part of the slope faces the filter tube (1). The collection box (33) is connected to the connecting groove (31).

8. A pulp filtration device for multi-fiber raw materials used in papermaking according to claim 7, characterized in that, The outer surface of the filter tube (1) is provided with a rotating groove (34), which is convex in shape. The rotating groove (34) is located between two sets of connecting collars (32). The filter tube (1) located between the two sets of connecting collars (32) is also provided with a filter hole. There are multiple sets of filter holes, and the multiple sets of filter holes are evenly distributed in the area of ​​the filter tube (1) located between the two sets of connecting collars (32). A rotating ring (35) is rotatably connected in the rotating groove (34). A scraper (36) is fixedly connected to the outside of the rotating ring (35). The scraper (36) is arc-shaped and fits against the outer surface of the filter tube (1). The scraper (36) has beveled edges on both sides.

9. A pulp filtration device for multi-fiber raw materials used in papermaking according to claim 8, characterized in that, The scraper (26) has a magnetic block embedded on the side facing the inner wall of the filter tube (1), and the scraper (36) also has a magnetic block embedded on the side facing the outer circular surface of the filter tube (1). The two sets of magnetic blocks have opposite poles on their corresponding surfaces.

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