Filtering system and filtering process based on papermaking white water

Abstract

The application provides a filter system based on papermaking white water, which comprises two first supporting frames and two second supporting frames, the two first supporting frames are located between the two second supporting frames, a filter cylinder is provided with filter holes, the two ends of the filter cylinder are rotatably connected to the top of the two first supporting frames, a first driving mechanism is used for driving the filter cylinder to rotate, two blocking rings are coaxially connected to the two ends of the filter cylinder respectively, a through hole is formed in the middle of the blocking ring, the two ends of a bearing piece are provided with connecting parts, a cleaning pipe is in communication with one end of the bearing piece, and a discharge pipe is in communication with the bottom of the other end of the bearing piece, a plurality of water inlets are formed in a water inlet pipe, a blowing head is connected with a blower for blowing the blowing head, the blowing head is provided with an air outlet, the air outlet is downwardly and vertically opposite to the top of the filter cylinder, and a second driving mechanism is used for driving the blowing head to reciprocate along the length direction of the filter cylinder. The filter system based on papermaking white water can achieve better filtering effect.

Description

Technical Field

[0001] This invention belongs to the field of papermaking technology and relates to a filtration system and filtration process based on papermaking white water. Background Technology

[0002] Currently, a Chinese patent with publication number CN112156524A discloses a papermaking white water filtration device and filtration process. It can filter fibers in white water, allowing the white water to be reused. However, in the actual filtration process, although the flushing holes on the stirring plate can flush the inner wall of the filter shell, flushing down the fibers and maintaining filtration efficiency and effect, the flushing effect is inevitably affected by the obstruction or resistance of the white water inside the shell during the flushing process. This results in a poor flushing effect, meaning that some fibers still easily adhere to the filter shell and affect subsequent filtration. If the adhered fibers adhere for too long, they are easily driven through the filter shell by the water flow, leading to poor filtration. Summary of the Invention

[0003] The purpose of this invention is to provide a filtration system and filtration process based on papermaking white water, aiming to solve the problem of poor filtration effect.

[0004] To solve the above-mentioned technical problems, the present invention provides a filtration system based on papermaking white water, comprising:

[0005] Two first support frames and two second support frames, with the two first support frames located between the two second support frames;

[0006] A horizontally shaped filter cylinder with filter holes is provided on the filter cylinder, and the two ends of the filter cylinder are rotatably connected to the top of the two first support frames.

[0007] A first driving mechanism is used to drive the filter cylinder to rotate;

[0008] The filter cartridge has two blocking rings, which are coaxially connected to both ends of the filter cartridge. The middle of each blocking ring has a passage opening.

[0009] The receiving component is a cover-shaped structure with an upward opening. Both ends of the receiving component are provided with connecting parts. The two connecting parts pass through the two through ports and are respectively connected to the two second support frames. One end of the receiving component is connected to a cleaning pipe, and the bottom of the other end is connected to a discharge pipe.

[0010] The water inlet pipe has multiple water inlets, a portion of which passes through the inlets, and all of the water inlets are directly opposite the inner wall of the filter cartridge. The water inlet pipe is lower than the receiving component.

[0011] A blower head is connected to a blower for blowing air onto the blower head. The blower head has an air outlet that faces downwards and is directly opposite the top of the filter cartridge. The vertical projection of the blower head is located within the vertical projection of the receiving member.

[0012] The second drive mechanism is used to drive the blower head to reciprocate along the length of the filter cylinder.

[0013] The present invention is further configured such that the water inlet pipe includes a water conveying section and an annular water inlet section communicating with the water conveying section, the water inlet section passing through two of the through ports;

[0014] The portion of the water inlet that passes through the filter cylinder is directly upstream of the bottom of the filter cylinder, and the longitudinal section of the portion of the water inlet that opens the water inlet is an arc shape with the opening facing the axis of the filter cylinder.

[0015] The present invention is further configured such that a plurality of annular partition rings are spaced apart on the inner wall of the filter cylinder, the partition rings are coaxial with the filter cylinder, and the outer walls of the partition rings are all connected to the inner wall of the filter cylinder.

[0016] The side of the receiving component has several clearance openings for the partition ring to pass through.

[0017] The present invention is further configured such that the first driving mechanism includes a driving motor fixedly connected to the second support frame, and a power rod is provided that rotates horizontally through the two second support frames, the driving motor being connected to the power rod;

[0018] The outer wall of the power rod is provided with a plurality of power teeth, and the inner ring of the separator ring is provided with passive teeth that mesh with the power teeth.

[0019] The receiving component has clearance holes on both sides for the power rod to move through.

[0020] The present invention is further configured such that the second driving mechanism includes a reciprocating screw horizontally rotatably connected to the two second support frames and a guide rod horizontally connected to the two second support frames. The guide rod is parallel to the reciprocating screw, the blower head is movably engaged with the reciprocating screw, both guide rods movably pass through the blower head, and the blower head movably fits against the outer wall of the guide rod.

[0021] The power rod is provided with an active bevel gear, and a third support frame is provided on the outer wall of the second support frame. A transmission rod is rotatably provided on the third support frame. One end of the transmission rod is provided with a passive bevel gear that meshes with the active bevel gear, and the other end is provided with a drive worm. A drive worm wheel that meshes with the drive worm is provided on the reciprocating screw.

[0022] The present invention is further configured such that a speed-increasing gearbox is provided on the second support frame, the speed-increasing gearbox includes an input rod and an output rod, the power rod is connected to the input rod, and the output rod is connected to the impeller of the blower;

[0023] The blower's outlet is connected to a flexible air guide pipe, and the free end of the flexible air guide pipe is connected to the air inlet end of the outlet.

[0024] The present invention is further configured such that the air outlet includes a transfer pipe vertically disposed at the top of the blower head, a transfer chamber horizontally disposed within the blower head, and a plurality of airflow channels communicating with the transfer chamber. The transfer chamber is connected to the bottom of the transfer pipe and the top of all the airflow channels, and the top of the transfer pipe is connected to the flexible air guide pipe.

[0025] The bottom of the blower head is an arc shape with an opening facing downwards. There is a set gap between the bottom of the blower head and the outer wall of the filter cylinder. An air equalization chamber is opened in the middle of the bottom of the blower head, and the air equalization chamber is connected to the bottom of all the airflow channels.

[0026] The present invention is further configured such that the receiving member includes a central part with a longitudinal cross-section in the shape of an arc and two fan-shaped edge parts located at both ends of the central part, all of the clearance openings are opened on the central part, and the clearance holes are opened on the edge parts;

[0027] The middle section is inclined, and the discharge pipe is connected to the bottom end of the middle section;

[0028] An annular flushing pipe is provided on the upper periphery of the middle part, and the periphery of the clearance port is also provided with the flushing pipe. Multiple flushing ports are opened on the side wall of the flushing pipe. All the flushing ports are used to flush the inner wall of the middle part. The cleaning pipe is connected to the flushing pipe.

[0029] The present invention is further configured such that the filter hole is frustoconical, and the end with the larger diameter of the filter hole is located on the outside of the filter cylinder.

[0030] The present invention also provides a process for filtration using a papermaking white water-based filtration system as described in any of the preceding claims, comprising the following steps:

[0031] S1, the first drive mechanism drives the filter cylinder to rotate;

[0032] S2, the white water to be filtered is pumped in through the inlet pipe, and the white water is sprayed out through the inlet and acts on the inner wall of the filter cylinder;

[0033] S3, under the action of centrifugal force, the filtered white water passes through the filter hole, and the filtered fibers are located on the inner wall of the filter cylinder, keeping the water level in the filter cylinder lower than the bottom of the inlet;

[0034] S4, the blower inputs airflow into the blower head, the airflow acts on the outside of the filter holes located at the top, the airflow passes through the filter holes and blows off the fibers adhering to the inner wall of the filter cylinder;

[0035] S4, the fibers fall and enter the receiving part, while the second drive mechanism drives the blower head to reciprocate to thoroughly clean the filter cartridge;

[0036] S5, periodically or continuously blow water or air into the receiving part through the cleaning pipe, driving the blown-off fibers to the discharge pipe and outward.

[0037] Compared with existing technologies, this invention provides a filtration system based on papermaking white water. During filtration, a first drive mechanism first drives the filter cylinder to rotate. Then, the white water to be filtered is pumped in through the inlet pipe and sprayed out through the inlet, acting on the inner wall of the filter cylinder. Under centrifugal force, the filtered white water passes through the filter holes, and the filtered fibers remain on the inner wall of the filter cylinder, keeping the water level inside the filter cylinder lower than the bottom of the inlet. A blower inputs airflow to the blower head, which acts on the outside of the filter holes located at the top. The airflow passes through the filter holes and blows off the fibers adhering to the inner wall of the filter cylinder. The fibers fall and enter the receiving component. Simultaneously, a second drive mechanism drives the blower head to reciprocate, thoroughly cleaning the filter cylinder. Water or airflow is periodically or continuously blown into the receiving component through the cleaning pipe, driving the blown-off fibers to the discharge pipe for external discharge.

[0038] The first support frame has an annular support ring at its top, and the inner ring of the support ring has a support groove. The outer wall of the filter cylinder has a limiting protrusion that cooperates with the support groove. Therefore, under the action of the first support frame and the support ring, the filter cylinder can be stably rotated.

[0039] The water to be filtered is sprayed into the filter cylinder through multiple inlets, where it is evenly distributed and acts on the inner wall of the filter cylinder. This allows the water to be efficiently filtered and centrifuged to the outside of the filter cylinder. Throughout the filtration process, a relatively small amount of water is kept in the inlet pipe, so that the water can flow fully to the outside of the filter cylinder after rotating at a certain angle, while also preventing excessive water from flowing out through the outlet.

[0040] The blower head is relatively small, allowing it to generate a larger airflow. This provides greater airflow force when blowing fibers adhering to the inner wall of the filter cartridge, resulting in better fiber removal. Furthermore, since there is no liquid obstruction inside the filter cartridge, the airflow acts effectively on the fibers, ensuring thorough fiber removal. Simultaneously, the blower head creates high pressure inside the filter cartridge relative to the outside, further accelerating the filtration process.

[0041] Driven by the second drive mechanism, the blower head can act on the filter cartridge comprehensively. Moreover, since the fiber accumulation rate inside the filter cartridge is relatively slow, a relatively large amount of fiber can accumulate in areas where the blower head is not acting, and then it can be blown off the filter cartridge more effectively when the blower head acts on it.

[0042] After the fibers are blown away, they fall into the receiving component under gravity. The receiving component is connected to the second support frame via two connecting parts, preventing it from interacting with the filter cartridge (and separator rings, etc.). In actual use, the cleaning pipe can continuously blow in air and water, or it can be done periodically. When the air and water flow acts on the receiving component, it drives the fibers to the discharge pipe, allowing them to be discharged normally, thus completing the filtration of white water. During the filtration process, baffles can be installed on the outside of the filter cartridge, and a water pipe or pool can be installed at the bottom to block the centrifuged white water and facilitate centralized treatment. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of an embodiment of the filtration system for papermaking white water according to the present invention;

[0044] Figure 2 yes Figure 1 Enlarged view of section A;

[0045] Figure 3 yes Figure 1 Enlarged view of section B;

[0046] Figure 4 yes Figure 1 Enlarged view of section C;

[0047] Figure 5 yes Figure 1 Enlarged view of section D;

[0048] Figure 6 yes Figure 1 Enlarged view of section E in the middle;

[0049] Figure 7 This is a cross-sectional view of an embodiment of the papermaking white water filtration system of the present invention. Figure 1 ;

[0050] Figure 8 yes Figure 7 Enlarged view of section F in the middle;

[0051] Figure 9 This is a cross-sectional view of an embodiment of the papermaking white water filtration system of the present invention. Figure 2 ;

[0052] Figure 10 yes Figure 9 Enlarged view of section G in the middle;

[0053] Figure 11 yes Figure 9 Enlarged view of section H in the middle;

[0054] Figure 12 yes Figure 9 Enlarged view of section J in the middle;

[0055] Figure 13 This is an internal schematic diagram of an embodiment of the papermaking white water filtration system of the present invention;

[0056] Figure 14 yes Figure 13 A magnified view of section K in the middle;

[0057] Figure 15 yes Figure 13 Enlarged view of section L in the middle;

[0058] Figure 16 This is a schematic diagram of an embodiment of the filter cartridge in the papermaking white water filtration system of the present invention;

[0059] Figure 17 This is a schematic diagram of an embodiment of the water inlet pipe in the papermaking white water filtration system of the present invention;

[0060] Figure 18 This is a schematic diagram of an embodiment of the blower head in the papermaking white water filtration system of the present invention;

[0061] Figure 19 This is a cross-sectional view of an embodiment of the blower head in the papermaking white water filtration system of the present invention;

[0062] Figure 20 This is a schematic diagram of an embodiment of a receiving component in a papermaking white water filtration system according to the present invention;

[0063] Figure 21 This is a schematic diagram of an embodiment of the filter hole in the papermaking white water filtration system of the present invention;

[0064] Figure 22This is a schematic diagram of an embodiment of the speed-increasing gearbox in the papermaking white water filtration system of the present invention.

[0065] Among them, 1. First support frame; 2. Second support frame; 3. Filter cylinder; 4. Filter hole; 5. Baffle ring; 6. Through port; 7. Receiving part; 7a. Middle part; 7b. Edge part; 8. Connecting part; 9. Cleaning pipe; 10. Discharge pipe; 11. Water inlet pipe; 11a. Water conveying part; 11b. Water inlet; 12. Water inlet; 13. Blower head; 14. Blower; 15. Air outlet; 15a. Transfer chamber; 15b. Airflow channel; 15c. Air equalization chamber; 16. Separating ring; 17. Let 18. Position port; 19. Drive motor; 20. Power rod; 21. Power gear; 22. Passive gear; 23. Clearance hole; 24. Reciprocating screw; 25. Guide rod; 26. Active bevel gear; 27. Third support frame; 28. Transmission rod; 29. ​​Passive bevel gear; 30. Drive worm gear; 31. Speed-increasing gearbox; 32. Input rod; 33. Output rod; 34. Flexible air guide tube; 35. Transmission tube; 36. Flushing tube; 37. Flushing port; 38. Support ring; 39. Limiting protrusion ring. Detailed Implementation

[0066] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed account of the filtration system and process based on papermaking white water proposed in this invention. The advantages and features of this invention will become clearer from the following description. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0067] A filtration system based on papermaking white water, such as Figures 1 to 22 As shown, it includes:

[0068] Two first support frames 1 and two second support frames 2, with the two first support frames 1 located between the two second support frames 2;

[0069] A horizontally shaped filter cylinder 3 has filter holes 4 on it, and both ends of the filter cylinder 3 are rotatably connected to the top of the two first support frames 1.

[0070] A first driving mechanism is used to drive the filter cylinder 3 to rotate;

[0071] Two blocking rings 5 ​​are provided, and the two blocking rings 5 ​​are coaxially connected to the two ends of the filter cylinder 3 respectively. A passage 6 is opened in the middle of the blocking ring 5.

[0072] The receiving component 7 is a cover-shaped structure with an upward opening. Both ends of the receiving component 7 are provided with connecting parts 8. The two connecting parts 8 pass through the two through ports 6 respectively and are connected to the two second support frames 2 respectively. One end of the receiving component 7 is connected to a cleaning pipe 9, and the bottom of the other end is connected to a discharge pipe 10.

[0073] The water inlet pipe 11 has multiple water inlets 12, part of the water inlet pipe 11 passes through the through port 6, and all the water inlets 12 are directly opposite the inner wall of the filter cylinder 3. The water inlet pipe 11 is lower than the receiving member 7.

[0074] The blower head 13 is externally connected to a blower 14 (fixed to the second support frame 2 via a bracket) for blowing air onto the blower head 13. The blower head 13 has an air outlet 15, which faces downwards and is directly opposite the top of the filter cartridge 3. The vertical projection of the blower head 13 is located within the vertical projection of the receiving member 7.

[0075] The second drive mechanism is used to drive the blower head 13 to reciprocate along the length of the filter cylinder 3.

[0076] The water inlet pipe 11 includes a water conveying section 11a and an annular water inlet section 11b communicating with the water conveying section 11a. The water inlet section 11b passes through the two through ports 6.

[0077] The portion of the water inlet 11b that passes through the filter cylinder 3 is directly upstream of the bottom of the filter cylinder 3, and the longitudinal section of the portion of the water inlet 11b that opens to the water inlet 12 is an arc shape with the opening facing the axis of the filter cylinder 3.

[0078] The inner wall of the filter cylinder 3 is provided with a plurality of annular partition rings 16 at intervals. The partition rings 16 are coaxial with the filter cylinder 3, and the outer walls of the partition rings 16 are all connected to the inner wall of the filter cylinder 3.

[0079] The side of the receiving member 7 is provided with several clearance openings 17 for the partition ring 16 to pass through.

[0080] The first driving mechanism includes a drive motor 18 fixedly connected to the second support frame 2, and a power rod 19 is provided that rotates horizontally through the two second support frames 2. The drive motor 18 is connected to the power rod 19.

[0081] The outer wall of the power rod 19 is provided with a plurality of power teeth 20, and the inner ring of the partition ring 16 is provided with passive teeth 21 that mesh with the power teeth 20.

[0082] The receiving member 7 has clearance holes 22 on both sides for the power rod 19 to move through.

[0083] The second drive mechanism includes a reciprocating screw 23 horizontally rotatably connected to the two second support frames 2 and a guide rod 24 horizontally connected to the two second support frames 2. The guide rod 24 is parallel to the reciprocating screw 23. The blower head 13 is movably engaged with the reciprocating screw 23 (i.e., a rotatable piece is hinged inside the blower head 13, and the outer wall of the reciprocating screw 23 has two threads in opposite directions. The rotatable piece can move into the two threads during the movement, and the rotatable piece can automatically reverse direction at the end of the thread, thereby changing the movement direction of the blower head 13). Both guide rods 24 movably pass through the blower head 13, and the blower head 13 movably fits against the outer wall of the guide rod 24.

[0084] The power rod 19 is provided with an active bevel gear 25, and a third support frame 26 is provided on the outer wall of the second support frame 2. A transmission rod 27 is rotatably provided on the third support frame 26. One end of the transmission rod 27 is provided with a passive bevel gear 28 that meshes with the active bevel gear 25, and the other end is provided with a drive worm gear 29. A drive worm wheel 30 that meshes with the drive worm gear 29 is provided on the reciprocating screw 23.

[0085] The second support frame 2 is provided with a speed-increasing gearbox 31, which includes an input rod 32 and an output rod 33. The power rod 19 is connected to the input rod 32, and the output rod 33 is connected to the impeller of the blower 14.

[0086] The blower 14 has a flexible air guide pipe 34 connected to its air outlet 15, and the free end of the flexible air guide pipe 34 is connected to the air inlet end of the air outlet 15.

[0087] The air outlet 15 includes a transmission pipe 35 vertically disposed at the top of the blower head 13, a transmission chamber 15a horizontally disposed within the blower head 13, and a plurality of airflow channels 15b communicating with the transmission chamber 15a. The transmission chamber 15a is connected to the bottom of the transmission pipe 35 and the top of all the airflow channels 15b. The top of the transmission pipe 35 is connected to the flexible air guide pipe 34.

[0088] The bottom of the blower head 13 is an arc shape with an opening facing downwards. There is a set gap between the bottom of the blower head 13 and the outer wall of the filter cylinder 3. An air equalization chamber 15c is opened in the middle of the bottom of the blower head 13. The air equalization chamber 15c is connected to the bottom of all the airflow channels 15b.

[0089] The receiving member 7 includes a middle part 7a with a circular arc cross section and two fan-shaped edge parts 7b located at both ends of the middle part 7a. All the clearance openings 17 are opened on the middle part 7a, and the clearance holes 22 are opened on the edge parts 7b.

[0090] The middle part 7a is inclined, and the discharge pipe 10 is connected to the bottom end of the middle part 7a;

[0091] An annular flushing pipe 36 is provided on the upper periphery of the middle part 7a. The periphery of the clearance port 17 is provided with the flushing pipe 36. Multiple flushing ports 37 are provided on the side wall of the flushing pipe 36. All the flushing ports 37 are used to flush the inner wall of the middle part 7a. The cleaning pipe 9 is connected to the flushing pipe 36.

[0092] The filter hole 4 is frustum-shaped, and the end of the filter hole 4 with a larger diameter is located on the outside of the filter cylinder 3.

[0093] The present invention also provides a process for filtration using a papermaking white water-based filtration system as described in any of the preceding claims, comprising the following steps:

[0094] S1, the first drive mechanism drives the filter cylinder 3 to rotate;

[0095] S2, the white water to be filtered is pumped in through the water inlet pipe 11, and the white water is sprayed out through the water inlet 12 and acts on the inner wall of the filter cylinder 3.

[0096] S3, under the action of centrifugal force, the filtered white water passes through the filter hole 4, and the filtered fibers are located on the inner wall of the filter cylinder 3, keeping the water level in the filter cylinder 3 lower than the bottom of the through port 6;

[0097] S4, the blower 14 inputs airflow into the blower head 13, the airflow acts on the outside of the filter hole 4 located at the top, the airflow passes through the filter hole 4 and blows off the fibers adhering to the inner wall of the filter cylinder 3.

[0098] S4, the fiber falls and enters the receiving part 7, while the second drive mechanism drives the blower head 13 to reciprocate to thoroughly clean the filter cartridge 3;

[0099] S5, periodically or continuously blow water or air into the receiving part 7 through the cleaning pipe 9, driving the blown-off fibers to the discharge pipe 10 and discharging them outward.

[0100] The filtration system and process based on papermaking white water provided by this invention, when filtering white water, firstly, the first drive mechanism drives the filter cylinder 3 to rotate, then the white water to be filtered is pumped in through the water inlet pipe 11, and the white water is sprayed out through the water inlet 12 and acts on the inner wall of the filter cylinder 3; under the action of centrifugal force, the filtered white water passes through the filter holes 4, and the filtered fibers are located on the inner wall of the filter cylinder 3, keeping the water level in the filter cylinder 3 lower than the bottom of the through-hole 6; the blower 14 inputs airflow to the blower head 13, The airflow acts on the outside of the filter holes 4 at the top (at this time the fiber height is the largest and the centrifugal force is the smallest, making it easy to separate from the inner wall of the filter cylinder 3). The airflow passes through the filter holes 4 and blows off the fibers adhering to the inner wall of the filter cylinder 3. The fibers fall and enter the receiving part 7. At the same time, the second drive mechanism drives the blower head 13 to reciprocate to thoroughly clean the filter cylinder 3. Water or airflow is periodically or continuously blown into the receiving part 7 through the cleaning pipe 9 to drive the blown-off fibers to the discharge pipe 10 and discharge them outward.

[0101] The first support frame 1 has an annular support ring 38 at its top, and the inner ring of the support ring 38 has a support groove. The outer wall of the filter cylinder 3 has a limiting protrusion 39 that cooperates with the support groove. Therefore, under the action of the first support frame 1 and the support ring 38, the filter cylinder 3 can be stably rotated.

[0102] After the water to be filtered is sprayed into the filter cylinder 3 through multiple inlets 12, it can be evenly dispersed and act on the inner wall of the filter cylinder 3. This allows the water to be efficiently filtered and centrifuged to the outside of the filter cylinder 3. Throughout the filtration process, a relatively small amount of water is kept in the inlet pipe 11, so that the water can flow fully to the outside of the filter cylinder 3 after rotating at a certain angle, while also preventing excessive water from flowing out through the outlet 6.

[0103] The blower head 13 is relatively small, resulting in a smaller effective range. This allows it to generate a sufficiently large airflow, providing greater force to blow the fibers adhering to the inner wall of the filter cartridge 3, thus improving fiber removal. Furthermore, since there is no liquid obstruction inside the filter cartridge 3, the airflow effectively targets the fibers, resulting in a thorough fiber removal effect. Simultaneously, the blower head 13 creates high pressure inside the filter cartridge 3 relative to the outside, further accelerating the filtration process.

[0104] Driven by the second drive mechanism, the blower head 13 can act on the filter cartridge 3 comprehensively; and because the fiber accumulation rate inside the filter cartridge 3 is relatively slow, a relatively large amount of fiber can accumulate in areas where the blower head 13 is not acting, so that when the blower head 13 acts on the filter cartridge 3, the fiber can be blown off the filter cartridge 3 more effectively.

[0105] After the fibers are blown away, they fall into the receiving component 7 under gravity. The receiving component 7 is connected to the second support frame 2 via two connecting parts 8, preventing the receiving component 7 from interacting with the filter cylinder 3 (and the partition ring 16, etc.). In actual use, the cleaning pipe 9 can continuously blow in air and water, or it can be done periodically. When the air and water flow acts on the receiving component 7, it drives the fibers to the discharge pipe 10, allowing the fibers to be discharged normally, thus completing the filtration of white water. During the filtration process, baffles can be installed on the outside of the filter cylinder 3, and water pipes or pools can be installed at the bottom to block the centrifuged white water and facilitate centralized treatment.

[0106] During the filtration process, the water pump pumps the white water to be filtered into the water delivery section 11a, then into the water inlet section 11b, and then into the filter cylinder 3 through both ends of the water inlet section 11b, and finally sprays it out through the water inlet 12. Since the water inlet section 11b is annular, in actual use, the white water can flow in evenly, reducing the water pressure at the water inlet 12 at different locations, so that filtration at different locations can be carried out evenly.

[0107] Furthermore, when water is sprayed out, it is blocked by the partition ring 16, which divides the filter cylinder 3 into several relatively independent spaces. This effectively prevents the water from flowing to the sides during centrifugation, ensuring the centrifugation effect. Simultaneously, when the blower head 13 blows out airflow, the partition ring 16 also isolates and blocks the airflow entering the filter cylinder 3, preventing it from flowing to the sides. This guides the airflow, increasing the blowing speed and force on the fibers, facilitating fiber separation from the inner wall of the filter cylinder 3.

[0108] Meanwhile, because the outer diameter of the filter hole 4 is larger and the inner diameter is smaller, firstly, the smaller diameter end can better prevent fibers from spilling out, ensuring filtration quality and effect; secondly, because its outer opening diameter is larger, it is easier for airflow to enter the filter hole 4, and a Venturi effect can be generated at the smaller diameter of the filter hole 4. That is, at this time, it can not only blow the fibers at the filter hole 4, but also drive the airflow around the inner side of the filter hole 4, so that the fibers around the inner wall of the filter hole 4 can also be blown off, resulting in a better and more comprehensive blowing effect.

[0109] During centrifugation, the drive motor 18 drives the power rod 19 to rotate, which in turn drives all the power teeth 20 to rotate. Simultaneously, the power teeth 20 drive the passive teeth 21 and the separator ring 16 to rotate, thus driving the filter cartridge 3 to rotate. Since the power rod 19, power teeth 20, etc., are all located inside the filter cartridge 3, the outer wall of the filter cartridge 3 used for filtration can remain smooth. This results in only a small gap between the blower head 13 and the outer wall of the filter cartridge 3, reducing gas loss and facilitating the airflow to fully act on the fibers, further ensuring the effective fiber removal.

[0110] During rotation, the power rod 19 drives the active bevel gear 25 to rotate, which in turn drives the passive bevel gear 28, the transmission rod 27, and the drive worm 29 to rotate. Simultaneously, the drive worm 29 drives the drive worm wheel 30 and the reciprocating screw 23 to rotate. Since the power rod 19 rotates continuously in one direction, the reciprocating screw 23 also rotates in one direction. However, because the reciprocating screw 23 can drive the blower head 13 to reciprocate, the blower head 13 can still act on the entire length of the filter cartridge 3 and blow off the fibers comprehensively.

[0111] In actual filtration, the filter cartridge 3 rotates at a relatively high speed. However, by driving the worm gear 29 and the worm wheel 30, the rotation speed of the reciprocating screw 23 can be reduced (the diagram is for illustrative purposes only and does not represent the actual structure; in actual use, the diameter of the worm wheel 30 can be made larger to reduce the moving speed of the blower head 13), thus allowing the blower head 13 to reciprocate at a lower speed. The reciprocating screw 23 is the same as those on the market, and the way the blower head 13 is connected to the reciprocating screw 23 is also the same as that on the market, so it will not be described in detail here.

[0112] The guide rod 24 improves the angular stability of the blower head 13, enabling it to maintain stable height and angle and perform stable reciprocating motion. Meanwhile, the water inlet 12 is positioned upstream of the bottom of the filter cylinder 3, thus allowing water to travel a greater distance and length after being sprayed onto the inner wall of the filter cylinder 3, resulting in better filtration effect and quality. Furthermore, the side of the water inlet 11b with the water inlet 12 is arc-shaped, which disperses the water, allowing it to reach more widely within the filter cylinder 3 and further promoting filtration from the side.

[0113] Throughout the filtration process, the separator ring 16 moves through the clearance port 17, meaning the receiving part 7 does not interact with the separator ring 16; similarly, the power rod 19 moves through the clearance hole 22, meaning the receiving part 7 does not affect the normal rotation of the power rod 19. The end of the power rod 19 is fixedly connected to the input rod 32 of the speed-increasing gearbox 31, and then the output rod 33 of the speed-increasing gearbox 31 is connected to the impeller input end of the blower 14. Thus, the speed of the power rod 19, after being increased by the speed-increasing gearbox 31, can drive the impeller of the blower 14 to rotate, thereby generating a larger airflow. Both the speed-increasing gearbox 31 and the blower 14 are conventional technologies; that is, the speed-increasing gearbox 31 contains several gears of different sizes that mesh sequentially, such as those shown in the attached diagram. Figure 22 As shown (different numbers of gears can be selected according to the actual situation, so that the impeller can have different speeds); at the same time, the blower 14 is preferably a centrifugal blower 14, that is, after the impeller is driven to rotate, it generates centrifugal force, which causes air to be discharged from the outer casing and enters the flexible air guide tube 34 (which can undergo elastic deformation, so that the blower head 13 can be blown no matter where it is located). Meanwhile, external air enters the outer casing through the air inlet of the outer casing, thereby realizing continuous blowing.

[0114] After passing through the flexible air guide tube 34, the airflow first enters the transmission tube 35, creating a positive pressure in the transmission chamber 15a. Then, it enters each airflow channel 15b evenly, creating a larger air pressure in the equalization chamber 15c. Finally, it all enters the filter cartridge 3 after passing through the filter hole 4.

[0115] The gap between the bottom of the blower head 13 and the outer wall of the filter cylinder 3 is very small (preferably 1-5mm, but other gaps can be selected according to actual conditions). Therefore, the two do not wear each other, but very little air leaks out between them, so that most of the airflow acts on the filter holes 4, ensuring the cleaning effect. At the same time, because the air equalization chamber 15c can distribute the air evenly, the air pressure in different places is relatively uniform, and it can act on all the filter holes 4 covered by the air equalization chamber 15c (the air equalization chamber 15c is small, so it still has sufficient air pressure), resulting in a wider cleaning range and better cleaning effect.

[0116] When cleaning the fibers held in the receiving component 7, water or air can be introduced through the cleaning pipe 9. The water or air then enters the rinsing pipe 36 and exits through all the rinsing ports 37. All the rinsing ports 37 are inclined and face the upper surface of the middle part 7a, thus effectively flushing the fibers to the center of the middle part 7a. Simultaneously, because the middle part 7a is inclined, the fibers can be easily driven to the discharge pipe 10 and finally discharged from it, resulting in good cleaning performance. In actual use, workers can also pass the water pipe over the top of the higher edge part 7b and use the water pipe to clean the interior of the receiving component 7.

[0117] In this application, only one drive motor 18 is needed to drive the filter cartridge 3 for centrifugation, drive the blower head 13 for reciprocating motion, and drive the blower 14 for blowing air. This reduces costs and allows the cooperation of each part of the structure to be carried out simultaneously, ensuring the filtration quality and effect of white water.

[0118] In actual production, the power rod 19 and the power tooth 20 can be positioned either above the receiving member 7 as shown in the attached drawings of this application, or they can be positioned below the receiving member 7, with the latter being the preferred position. This can better prevent fibers and other materials from adhering to the power rod 19 and the power tooth 20 during actual use.

[0119] In another embodiment, the end of the power rod 19 is connected to a water pump, which is used to drive the white water to be filtered into the water inlet pipe 11; and in actual use, a speed-increasing gearbox 31 or a speed-reducing gearbox can be connected upstream of the water pump.

[0120] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0121] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A filtration system based on papermaking white water, characterized in that, include: Two first support frames (1) and two second support frames (2), with the two first support frames (1) located between the two second support frames (2); A horizontally oriented filter cylinder (3) has filter holes (4) on it, and the two ends of the filter cylinder (3) are rotatably connected to the top of the two first support frames (1). A first driving mechanism is used to drive the filter cylinder (3) to rotate; Two blocking rings (5) are provided, and the two blocking rings (5) are coaxially connected to the two ends of the filter cylinder (3). A passage (6) is provided in the middle of the blocking ring (5). The receiving part (7) is a cover-shaped structure with an opening facing upwards. Both ends of the receiving part (7) are provided with connecting parts (8). The two connecting parts (8) pass through the two through ports (6) respectively and are connected to the two second support frames (2) respectively. One end of the receiving part (7) is connected to a cleaning pipe (9), and the bottom of the other end is connected to a discharge pipe (10). Water inlet pipe (11) with multiple water inlets (12) provided on it; part of the water inlet pipe (11) passes through the through port (6); and all the water inlets (12) are directly opposite the inner wall of the filter cylinder (3); the water inlet pipe (11) is lower than the receiving member (7). A blower head (13) is connected to a blower (14) for blowing air onto the blower head (13). An air outlet (15) is provided on the blower head (13). The air outlet (15) faces downward and is directly opposite the top of the filter cylinder (3). The vertical projection of the blower head (13) is located within the vertical projection of the receiving member (7). The second drive mechanism is used to drive the blower head (13) to reciprocate along the length of the filter cylinder (3); The inner wall of the filter cylinder (3) is provided with a plurality of annular partition rings (16) at intervals. The partition rings (16) are coaxial with the filter cylinder (3), and the outer walls of the partition rings (16) are all connected to the inner wall of the filter cylinder (3). The side of the receiving part (7) is provided with several clearance openings (17) for the partition ring (16) to move through; The first driving mechanism includes a drive motor (18) fixedly connected to the second support frame (2), and a power rod (19) is provided horizontally through the two second support frames (2). The drive motor (18) is connected to the power rod (19). The outer wall of the power rod (19) is provided with a plurality of power teeth (20), and the inner ring of the partition ring (16) is provided with passive teeth (21) that mesh with the power teeth (20). The receiving member (7) has clearance holes (22) on both sides for the power rod (19) to move through; The second drive mechanism includes a reciprocating screw (23) horizontally rotatably connected to the two second support frames (2) and a guide rod (24) horizontally connected to the two second support frames (2). The guide rod (24) is parallel to the reciprocating screw (23). The blower head (13) is movably engaged with the reciprocating screw (23). Both guide rods (24) movably pass through the blower head (13), and the blower head (13) movably fits against the outer wall of the guide rod (24). The power rod (19) is provided with an active bevel tooth (25), and a third support frame (26) is provided on the outer wall of the second support frame (2). A transmission rod (27) is rotatably provided on the third support frame (26). One end of the transmission rod (27) is provided with a passive bevel tooth (28) that meshes with the active bevel tooth (25), and the other end is provided with a drive worm (29). A drive worm wheel (30) that meshes with the drive worm (29) is provided on the reciprocating screw (23).

2. The filtration system based on papermaking white water according to claim 1, characterized in that, The water inlet pipe (11) includes a water conveying section (11a) and an annular water inlet section (11b) communicating with the water conveying section (11a). The water inlet section (11b) passes through the two passage ports (6). The portion of the water inlet (11b) that passes through the filter cylinder (3) is directly upstream of the bottom of the filter cylinder (3), and the longitudinal section of the portion of the water inlet (11b) that opens the water inlet (12) is an arc shape with the opening facing the axis of the filter cylinder (3).

3. The filtration system based on papermaking white water according to claim 1, characterized in that, The second support frame (2) is provided with a speed-increasing gearbox (31), which includes an input rod (32) and an output rod (33). The power rod (19) is connected to the input rod (32), and the output rod (33) is connected to the impeller of the blower (14). The blower (14) has a flexible air guide pipe (34) connected to its air outlet (15), and the free end of the flexible air guide pipe (34) is connected to the air inlet end of the air outlet (15).

4. The filtration system based on papermaking white water according to claim 3, characterized in that, The air outlet (15) includes a transmission pipe (35) vertically disposed at the top of the blower head (13), a transmission chamber (15a) horizontally disposed in the blower head (13), and a plurality of airflow channels (15b) communicating with the transmission chamber (15a). The transmission chamber (15a) is connected to the bottom of the transmission pipe (35) and the top of all the airflow channels (15b). The top of the transmission pipe (35) is connected to the flexible air guide pipe (34). The bottom of the blower head (13) is an arc shape with the opening facing downwards. There is a set gap between the bottom of the blower head (13) and the outer wall of the filter cylinder (3). A uniform air chamber (15c) is opened in the middle of the bottom of the blower head (13). The uniform air chamber (15c) is connected to the bottom of all the airflow channels (15b).

5. The filtration system based on papermaking white water according to claim 1, characterized in that, The receiving part (7) includes a middle part (7a) with a circular arc cross section and two fan-shaped edge parts (7b) located at both ends of the middle part (7a). All the clearance openings (17) are opened on the middle part (7a), and the clearance holes (22) are opened on the edge parts (7b). The middle part (7a) is inclined, and the discharge pipe (10) is connected to the bottom end of the middle part (7a); An annular flushing pipe (36) is provided on the upper periphery of the middle part (7a), and the periphery of the relief port (17) is provided with the flushing pipe (36). Multiple flushing ports (37) are provided on the side wall of the flushing pipe (36). All the flushing ports (37) are used to flush the inner wall of the middle part (7a). The cleaning pipe (9) is connected to the flushing pipe (36).

6. The filtration system based on papermaking white water according to claim 1, characterized in that, The filter hole (4) is frustum shaped, and the end with the larger diameter of the filter hole (4) is located on the outside of the filter cylinder (3).

7. A process for filtration using a papermaking white water-based filtration system as described in any one of claims 1-6, characterized in that, Includes the following steps: S1, the first drive mechanism drives the filter cylinder (3) to rotate; S2, the white water to be filtered is pumped in through the inlet pipe (11), and the white water is sprayed out through the inlet (12) and acts on the inner wall of the filter cylinder (3); S3, under the action of centrifugal force, the filtered white water passes through the filter hole (4), and the filtered fibers are located on the inner wall of the filter cylinder (3), keeping the water level in the filter cylinder (3) lower than the bottom of the through hole (6); S4, the blower (14) inputs airflow into the blower head (13), the airflow acts on the outside of the filter hole (4) located at the top, the airflow passes through the filter hole (4) and blows off the fibers adhering to the inner wall of the filter cylinder (3); S4, the fiber falls and enters the receiving part (7), while the second drive mechanism drives the blower head (13) to reciprocate to thoroughly clean the filter cartridge (3); S5, periodically or continuously blow water or air into the receiving part (7) through the cleaning pipe (9) to drive the blown-off fibers to the discharge pipe (10) and discharge them outward.

Images