Environment-friendly waste silk melt filtration system

Abstract

The present application relates to waste and old textile, waste and old textile silk processing environment-friendly fiber melt technical field, especially in kind of environmental protection waste silk melt filter system, including filter bin and transfer bin, filter bin includes upper filter bin and lower filter bin, first filter screen, second filter screen and third filter screen are respectively arranged in upper filter bin and lower filter bin, cleaning mechanism is arranged in filter bin, the present application is filtered by multiple filter screens in filter bin to melt gradually, at the same time, setting cleaning mechanism in filter bin, using cleaning mechanism to carry out regular automatic cleaning treatment to each filter screen, avoid filter screen to cause blockage, so that filter screen can work for a long time, and working efficiency will not be reduced, improve the efficiency of filter screen to melt filtration, avoid the shutdown maintenance of filter system, provide the efficiency of textile fiber recycling and regeneration processing.

Description

Technical Field

[0001] This invention relates to the field of environmentally friendly fiber melt technology for processing waste textiles and waste textile fibers, and particularly to an environmentally friendly waste fiber melt filtration system. Background Technology

[0002] Processing waste fibers into environmentally friendly textile fibers is a key aspect of the textile industry's sustainable transformation. This includes recycling and reusing polyester waste, nylon, and other synthetic materials to produce new fibers. This recycling not only reduces dependence on crude oil resources but also significantly reduces waste and greenhouse gas emissions.

[0003] The main principle of processing waste filaments into environmentally friendly textile fibers is to sort and clean collected old textiles, waste textile fibers, and common plastic beverage bottles in our lives, cut and crush these raw materials into granules, and then melt them into environmentally friendly waste filament melt through chemical or mechanical recycling. Finally, the waste filament melt is stretched and shaped into fibers.

[0004] During the melting and spinning process, the melt needs to be filtered, and the main purpose of the filtration process is to...

[0005] 1. Removal of impurities and contaminants: Waste fibers may contain impurities and contaminants during the recycling process, such as dust, grease, and metal particles. If these impurities are not removed, they will affect the quality and performance of the final product, such as causing fiber breakage and uneven coloring.

[0006] 2. Improve product quality: By filtering the melt, insoluble substances and larger polymer particles can be removed, ensuring that the produced fibers have better uniformity and stability. This is especially important for producing high-quality, environmentally friendly fibers.

[0007] 3. Protect production equipment: During spinning and extrusion, unfiltered impurities may clog the spinneret orifices, affecting production efficiency and normal equipment operation. Filtering the melt can extend the service life of the equipment and reduce maintenance costs.

[0008] 4. Enhanced fiber properties: A pure melt facilitates the production of fibers with superior physical properties, such as better strength, elongation, and abrasion resistance. This allows the produced environmentally friendly fibers to be used in a wider range of fields.

[0009] 5. Meeting specific needs: Certain specific application scenarios have strict requirements on the purity and performance of fibers, such as for use in filter materials and medical applications.

[0010] Therefore, the purity of waste filtrate filtration is one of the important factors determining the quality of recycled textile fibers.

[0011] However, in existing filtration systems, the filter screens can provide good filtration of the melt in the early stages when filtering waste filaments. But as the filtration work continues, the filter screens gradually become clogged, and the efficiency of the filter screens gradually decreases. At this point, it is necessary to shut down the filtration system for maintenance. However, the filtration system is connected to the entire production line for processing waste filaments, so it is not possible to meet the purpose of shutting down the system for maintenance alone.

[0012] Chinese patent application number 202210223568.4 discloses a multi-stage melt filtration device, relating to the field of melt filtration technology. The device includes a filter cylinder, a barrel-shaped filter screen rotatably connected to the top wall of the filter cylinder, and a suction pump body. An inlet pipe is fixedly connected to the upper surface of the filter cylinder, and the inlet pipe is connected to the barrel-shaped filter screen. This invention has a reasonable design structure. Through the coordinated arrangement of the suction pipe, connecting pipe, annular collector, lifting mechanism, and fine filtration mechanism, it utilizes the barrel-shaped filter screen and fine filtration mechanism to perform multi-stage filtration of the melt. This not only significantly improves the filtration accuracy of the melt, resulting in more uniform crystallization after the filaments cool, but also avoids the phenomena of clogging during spinning and uneven extrusion of the spinning holes caused by uneven pressure.

[0013] However, according to the applicant, the multi-stage filtration device described above will become clogged after working for a long time, requiring regular maintenance, which will greatly reduce the efficiency of the work. Summary of the Invention

[0014] To address the above problems, this invention provides an environmentally friendly waste fiber melt filtration system. By installing multiple filter screens within the filter hopper to filter the melt step by step, a cleaning mechanism is also installed within the filter hopper to automatically clean each filter screen periodically. This prevents clogging and allows the filter screens to operate for extended periods without reducing efficiency. This improves the efficiency of the filter screens in filtering the melt, avoids downtime for maintenance, and enhances the efficiency of textile fiber recycling.

[0015] To achieve the above objectives, the present invention provides the following technical solution:

[0016] An environmentally friendly waste filament melt filtration system includes:

[0017] Filter silos and transfer silos;

[0018] The filter hopper includes an upper filter hopper and a lower filter hopper, which are sealed together. The upper filter hopper has a melt inlet at its top and a horizontal first filter screen at the sealed connection point between the upper and lower filter hoppers. The lower filter hopper has a melt outlet at its bottom. The lower filter hopper includes a first lower filter hopper and a second lower filter hopper nested together. A cylindrical second filter screen is installed on the lower side wall of the first lower filter hopper, and a cylindrical second filter screen is installed on the middle side wall of the second lower filter hopper. The third filter screen also includes a cleaning mechanism, which includes a cleaning brush, an upper cleaning disc, and a lower cleaning disc. The cleaning brush is positioned above the first filter screen and rotates to clean the first filter screen. The upper and lower cleaning discs are positioned at the location where the first and second lower filter chambers are interlocked. The upper cleaning disc moves along the axial direction of the second filter screen to clean it, and the lower cleaning disc moves along the axial direction of the third filter screen to clean it.

[0019] The transfer hopper is connected and disposed below the filter hopper. The transfer hopper is connected to the melt outlet, and the bottom of the transfer hopper is provided with a melt output port.

[0020] As an improvement, the environmentally friendly waste filament melt is fed into the filter bin through the melt inlet and then undergoes triple filtration through the first filter screen, the second filter screen and the third filter screen in sequence.

[0021] The mesh count of the first filter, the second filter, and the third filter gradually increases.

[0022] As an improvement, the first filter screen has a mesh size of 100-150, the second filter screen has a mesh size of 200-300, and the third filter screen has a mesh size of 800-1500.

[0023] As an improvement, the sweeping brush, the upper sweeping disc, and the lower sweeping disc are all driven by a rotating shaft.

[0024] The rotating shaft is vertically inserted into the filter hopper, and the rotating shaft drives the cleaning brush to rotate.

[0025] The upper cleaning disc and the lower cleaning disc are driven by two sets of linkage mechanisms symmetrically arranged on the bottom plate of the first lower filter chamber, and reciprocate along the axial direction of the second filter screen or the third filter screen, respectively.

[0026] As an improvement, the rotating shaft is provided with a thread, and the upper cleaning disc is provided with a nut that mates with the thread. The nut is fixedly connected to the upper cleaning disc. When the rotating shaft rotates, the upper cleaning disc moves axially along the rotating shaft through the engagement of the thread and the nut.

[0027] As an improvement, each linkage mechanism includes two sets of linkages that are hinged to each other. The hinge point A at the hinged ends of the two sets of linkages slides horizontally on the bottom plate of the first lower filter chamber, and the other ends of the linkages are respectively hinged to the upper cleaning disc and the lower cleaning disc.

[0028] When the upper cleaning disc moves axially along the rotation axis, the included angle α of the connecting rod changes, causing the lower cleaning disc to move synchronously along the rotation axis.

[0029] As an improvement, the auxiliary filter chamber has a detachable and openable top. The auxiliary filter chamber is connected to the isolation cavity formed by the closed upper cleaning disc and the lower cleaning disc through a connecting pipe. An auxiliary filter screen is provided inside the auxiliary filter chamber. The mesh size of the auxiliary filter screen is the same as that of the third filter screen. The auxiliary filter chamber is connected to the transfer hopper through a return pipe.

[0030] After the upper cleaning disc and the lower cleaning disc are closed, the environmentally friendly waste filament melt and impurities in the isolation cavity are guided to the auxiliary filter chamber through the connecting pipe. After being filtered by the auxiliary filter screen, they are returned to the transfer hopper through the return pipe.

[0031] As an improvement, both the upper cleaning disk and the lower cleaning disk include an inner disk and an outer disk;

[0032] The inner disc is hinged to the corresponding connecting rod, and a sealing strip is provided on the inner disc. The nut is fixedly installed on the inner disc of the upper cleaning disc.

[0033] The outer disc is mounted on the inner disc. A cleaning steel brush is provided along the circumference of the outer disc. The cleaning steel brush is obliquely positioned and has liquid permeation grooves spaced on it.

[0034] As an improvement, the outer disk is provided with a protruding guide block, and the rotating shaft and the side wall of the connecting pipe are both provided with spiral rotating grooves. When the upper cleaning disk and the lower cleaning disk move, the outer disk is driven to rotate through the cooperation of the guide block and the rotating groove.

[0035] As an improvement, the rotating shaft is hollow and has a flow channel inside, which is connected to the isolation cavity. A through hole is provided on the rotating shaft, which is connected to the flow channel.

[0036] The outer disk of the upper cleaning disk extends upward and is provided with a sleeve, which has a through hole that corresponds to and matches the through hole;

[0037] When the upper cleaning disc moves to its limit position along the axial direction of the rotating shaft, the through hole and the through hole are connected in a corresponding manner.

[0038] The beneficial effects of this invention are as follows:

[0039] (1) This invention filters the melt step by step by setting multiple filter screens in the filter hopper. The multiple filter screens will perform fine and targeted filtration of the melt, so that all kinds of impurities inside the melt are completely filtered. In addition, a cleaning mechanism is set in the filter hopper to perform regular automatic cleaning of each filter screen, avoiding clogging of the filter screen, so that the filter screen can work for a long time without reducing its working efficiency, improving the efficiency of the filter screen in filtering the melt, avoiding the downtime maintenance of the filtration system, and improving the efficiency of textile fiber recycling and regeneration processing.

[0040] (2) While cleaning the filter screen through the cleaning mechanism, the present invention also uses the isolation cavity formed by the upper cleaning disc and the lower cleaning disc to collect and discharge the impurities cleaned off the filter screen in a timely manner, so that the impurities will not remain in the filter material bin, thereby further extending the working time of the filter screen and improving the working efficiency of the system.

[0041] (3) By setting up an auxiliary filter chamber, the present invention uses the auxiliary filter screen in the auxiliary filter chamber to filter the impurities from the filter bin, so that the melt is returned to the transfer bin. The auxiliary filter screen in the auxiliary filter chamber can be inspected and maintained during the idle interval, and the impurities can be discharged in time without interfering with the normal operation of the filtration system.

[0042] (4) When the present invention drives the cleaning brush, the upper cleaning disc and the lower cleaning disc to perform cleaning work by rotating the shaft, the cleaning steel brush on the upper cleaning disc and the lower cleaning disc can rotate through the cooperation of the rotating groove and the guide block, so as to quickly clean the second filter screen and the third filter screen. The impurities that are cleaned can quickly enter the open upper cleaning disc and the lower cleaning disc through the liquid permeation groove for discharge. The cleaning speed is fast and the cleaning efficiency is high.

[0043] (5) The present invention provides a hollow flow channel and a through hole inside the rotating shaft. By using the through hole provided on the upper cleaning plate, the through hole and the through hole are staggered when the filtration system is operating normally, thus isolating the hollow flow channel from the outside. When cleaning the filter screen, the through hole and the through hole match, guiding the impurities cleaned off the first filter screen to the space between the upper cleaning plate and the lower cleaning plate for timely discharge.

[0044] In summary, this invention has the advantages of good filtration effect, high filtration efficiency, long filtration working time, and no need for downtime maintenance, and is especially suitable for the field of environmentally friendly fiber melt technology for processing waste textiles and waste textile fibers. Attached Figure Description

[0045] Figure 1 A schematic diagram of the three-dimensional structure of the invention;

[0046] Figure 2 This is a schematic cross-sectional view of the present invention;

[0047] Figure 3 This is a schematic diagram of a partial structure of the system of the present invention;

[0048] Figure 4 This is a schematic cross-sectional view of the internal structure of the filter hopper of the present invention;

[0049] Figure 5 This is a front view schematic diagram of the cleaning mechanism of the present invention;

[0050] Figure 6 This is a cross-sectional schematic diagram of the cleaning mechanism of the present invention;

[0051] Figure 7 for Figure 6 Enlarged structural diagram at point C;

[0052] Figure 8 for Figure 6 Enlarged structural diagram at point D;

[0053] Figure 9 This is a schematic cross-sectional view of the outer disk in the cleaning disc of the present invention;

[0054] Figure 10 This is a schematic diagram of the three-dimensional structure of the outer disk in the cleaning disk of the present invention;

[0055] Figure 11 for Figure 10 Enlarged structural diagram at point B;

[0056] Figure 12 This is a schematic cross-sectional view of the lower filter chamber of the present invention;

[0057] Figure 13 for Figure 12 Enlarged structural diagram at point E;

[0058] Figure 14 This is a schematic diagram of the rotated cross-sectional structure of the present invention;

[0059] Figure 15 This is a schematic diagram of the connection structure between the auxiliary filter chamber and the filter media chamber of the present invention;

[0060] Figure 16This is a schematic diagram of the three-dimensional structure of the auxiliary filter screen of the present invention.

[0061] In the diagram: 1. Filter bin; 11. Upper filter bin; 111. Melt inlet; 12. Lower filter bin; 120. Melt outlet; 121. First lower filter bin; 122. Second lower filter bin; 13. First filter screen; 14. Second filter screen; 15. Third filter screen; 2. Transfer bin; 21. Melt outlet; 4. Cleaning mechanism; 41. Cleaning brush; 42. Upper cleaning disc; 420. Isolation chamber; 421. Nut; 43. Lower cleaning disc. Sweeping disc, 431, inner disc, 432, outer disc, 433, sealing strip, 434, cleaning steel brush, 435, guide block, 436, liquid permeation tank, 437, rotating tank, 438, sleeve, 439, through hole, 44, rotating shaft, 440, flow channel, 441, thread, 442, through hole, 45, linkage mechanism, 451, connecting rod, 5, auxiliary filter chamber, 51, connecting pipe, 52, auxiliary filter screen, 53, return pipe, A, hinge point. Detailed Implementation

[0062] 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.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this invention.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0065] Example 1:

[0066] like Figures 1 to 4As shown, an environmentally friendly waste filament melt filtration system includes:

[0067] Filter hopper 1 and transfer hopper 2;

[0068] The filter hopper 1 includes an upper filter hopper 11 and a lower filter hopper 12, which are sealed together. The upper filter hopper 11 has a melt inlet 111 at its top, and a horizontal first filter screen 13 is installed at the sealed joint between the upper filter hopper 11 and the lower filter hopper 12. The lower filter hopper 12 has a melt outlet 120 at its bottom. The lower filter hopper 12 includes a first lower filter hopper 121 and a second lower filter hopper 122 nested together. A cylindrical second filter screen 14 is installed on the lower sidewall of the first lower filter hopper 121, and a... The cylindrical third filter screen 15 also includes a cleaning mechanism 4, which includes a cleaning brush 41, an upper cleaning disc 42, and a lower cleaning disc 43. The cleaning brush 41 is disposed above the first filter screen 13 and rotates to clean the first filter screen 13. The upper cleaning disc 42 and the lower cleaning disc 43 are disposed at the position where the first lower filter chamber 121 and the second lower filter chamber 122 are interlocked. The upper cleaning disc 42 moves along the axial direction of the second filter screen 14 to clean the second filter screen 14, and the lower cleaning disc 43 moves along the axial direction of the third filter screen 15 to clean the third filter screen 15.

[0069] The transfer hopper 2 is connected and disposed below the filter hopper 1. The transfer hopper 2 is connected to the melt outlet 120, and the bottom of the transfer hopper 2 is provided with a melt outlet 21.

[0070] Compared to the melt multi-stage filtration device mentioned in the prior art literature, the technical solution of this application not only has three sets of filter screens, but also can use the cleaning mechanism 4 to intermittently clean the three sets of filter screens to remove impurities adhering to the three sets of filter screens and avoid the filter screens from being blocked. Therefore, compared with the technical solution of the prior art literature, the filter screen of this application can have a longer working time, higher filtration efficiency, and can be maintained without downtime.

[0071] The environmentally friendly waste filament melt is fed into the filter bin 1 through the melt inlet 111 and then undergoes triple filtration through the first filter screen 13, the second filter screen 14 and the third filter screen 15.

[0072] The mesh counts of the first filter screen 13, the second filter screen 14, and the third filter screen 15 gradually increase.

[0073] Specifically, the first filter screen 13 has a mesh size of 100-150, the second filter screen 14 has a mesh size of 200-300, and the third filter screen 15 has a mesh size of 800-1500.

[0074] When filtering waste filament melt, the mesh count (i.e., threads per inch, a unit used to measure filter density) of the filter screen used depends primarily on the size of the impurities to be filtered and the quality requirements of the final fiber product. The required mesh count may vary depending on the application and product specifications.

[0075] Generally, the mesh count of filter screens can range from tens to thousands of meshes. For applications requiring high fiber quality, filter screens with mesh counts of several hundred or even higher may be needed to ensure the purity of the melt. For example, in the manufacture of certain high-performance or ultrafine environmentally friendly fibers, filter screens with mesh counts of up to 1500 or higher may be used. For ordinary fiber production, filter screens with mesh counts of 100 to 400 may suffice. Therefore, although this application specifies the mesh counts of the first filter screen 13, the second filter screen 14, and the third filter screen 15, it does not limit the mesh counts of the first filter screen 13, the second filter screen 14, and the third filter screen 15 to only those specified in this application.

[0076] To further explain, the first filter screen 13 has the smallest mesh size and the largest filter holes, removing the largest particle size of impurities. Therefore, when set horizontally, viscous melt can still pass smoothly through the first filter screen 13 and enter below it. The second filter screen 14 and the third filter screen 15 are cylindrical because as the mesh size increases, the diameter of the filter holes decreases, and the smoothness of the melt passing through the filter holes decreases. Therefore, a cylindrical filter screen is used, and the melt pressure forces the melt through the filter screen. The area of ​​a horizontally set filter screen depends on the diameter of the filter screen, while the area of ​​a cylindrical filter screen depends on the height. Therefore, as long as the height of the cylindrical filter screen is sufficient, it can achieve the purpose of filtering a large area of ​​melt per unit time.

[0077] Example 2:

[0078] Referring to Example 1, the difference between Example 2 and Example 1 lies in the following:

[0079] like Figures 4 to 14 As shown, the sweeping brush 41, the upper sweeping disc 42 and the lower sweeping disc 43 are all driven by the rotating shaft 44 to operate;

[0080] The rotating shaft 44 is vertically inserted into the filter bin 1, and the rotating shaft 44 drives the cleaning brush 41 to rotate.

[0081] The upper cleaning disc 42 and the lower cleaning disc 43 are driven by two sets of linkage mechanisms 45 symmetrically arranged on the bottom plate of the first lower filter chamber 121, and reciprocate along the axial direction of the second filter screen 14 or the third filter screen 15, respectively.

[0082] Furthermore, the rotating shaft 44 is provided with a thread 441, and the upper cleaning disc 42 is provided with a nut 421 that mates with the thread 441. The nut 421 is fixedly connected to the upper cleaning disc 42. When the rotating shaft 44 rotates, the upper cleaning disc 42 moves along the axial direction of the rotating shaft 44 through the engagement of the thread 441 and the nut 421.

[0083] Furthermore, each set of linkage mechanisms 45 includes two sets of linkages 451 that are hinged to each other. The hinge point A at the hinged ends of the two sets of linkages 451 slides horizontally on the bottom plate of the first lower filter chamber 121. The bottom plate of the first lower filter chamber 121 is provided with a sliding groove for the hinge point A to slide, and the bottom plate of the first lower filter chamber 121 is provided with a through hole connecting the upper and lower parts. The other end of the linkage 451 is respectively hinged to the upper cleaning disc 42 and the lower cleaning disc 43.

[0084] When the upper cleaning disc 42 moves axially along the rotating shaft 44, the included angle α of the connecting rod 451 changes, causing the lower cleaning disc 43 to move synchronously along the rotating shaft 44.

[0085] It should be noted that when the rotating shaft 44 is electrically rotated by the drive motor, the upper cleaning disc 42 can move along the axial direction of the rotating shaft 44 because the rotating shaft 44 is provided with a thread 441, and the nut 421 cooperates with the thread 441. Note that at this time, the circumferential direction of the nut 421 is fixed through the cooperation of the linkage mechanism 45 with the bottom plate of the first lower filter chamber 121. Therefore, the upper cleaning disc 42 can move along the axial direction of the rotating shaft 44. When the upper cleaning disc 42 moves along the rotating shaft 44, by changing the included angle of the linkage mechanism 45, the lower cleaning disc 43 can also move in the opposite direction to the upper cleaning disc 42 along the axial direction of the rotating shaft 44. That is, when the upper cleaning disc 42 moves upward, the lower cleaning disc 43 moves downward, and vice versa.

[0086] During the movement of the upper cleaning disc 42 and the lower cleaning disc 43, the steel brushes set on the periphery of the upper cleaning disc 42 and the lower cleaning disc 43 will contact and rub against the second filter screen 14 or the third filter screen 15 respectively, cleaning the second filter screen 14 or the third filter screen 15 and removing the impurities adhering to the second filter screen 14 or the third filter screen 15.

[0087] Furthermore, the first filter screen 13, the second filter screen 14, and the third filter screen 15 are preferably made of high-quality stainless steel wire mesh or metal fiber sintered felt as the main material. Stainless steel wire mesh, due to its excellent corrosion resistance, heat resistance, strength, and sustainability, is particularly suitable for filtering high-temperature and high-viscosity melts. Metal fiber sintered felt, due to its high porosity, good permeability, and high filtration accuracy, is widely used in applications requiring higher filtration efficiency and precision. These materials effectively remove impurities from the melt, ensuring the quality of the fiber products.

[0088] The drive motor that drives the rotating shaft 44 to rotate is preferably a servo motor. The servo motor can be controlled to perform intermittent forward and reverse rotation through the control board. At the same time, a flow meter is installed at the melt outlet 120 of the filter bin 1 to monitor the melt flow rate. When the melt flow rate is lower than the set value, the control board will control the servo motor to run, driving the cleaning mechanism 4 to run and clean the first filter screen 13, the second filter screen 14 and the third filter screen 15.

[0089] Example 3:

[0090] Referring to Example 1, the difference between Example 3 and Example 1 of this application lies in the following:

[0091] like Figures 15 to 16 As shown, it also includes an auxiliary filter chamber 5, the top of which is detachably openable. The auxiliary filter chamber 5 is connected to the isolation cavity 420 formed by the closed upper cleaning disc 42 and the lower cleaning disc 43 via a connecting pipe 51. An auxiliary filter screen 52 is provided inside the auxiliary filter chamber 5, and the mesh size of the auxiliary filter screen 52 is the same as that of the third filter screen 15. The auxiliary filter chamber 5 is connected to the transfer hopper 2 via a return pipe 53.

[0092] After the upper cleaning disc 42 and the lower cleaning disc 43 are closed, the environmentally friendly waste filament melt and impurities in the isolation cavity 420 are guided to the auxiliary filter chamber 5 through the connecting pipe 51, filtered by the auxiliary filter screen 52, and then returned to the transfer hopper 2 through the return pipe 53.

[0093] The upper cleaning disk 42 and the lower cleaning disk 43 both include an inner disk 431 and an outer disk 432, and the inner disk 431 and the outer disk 432 are provided with flanged edges around their circumferences.

[0094] The inner plate 431 is hinged to the corresponding connecting rod 451. The inner plate 431 is provided with a sealing strip 433, and the nut 421 is fixedly installed on the inner plate 431 of the upper cleaning plate 42.

[0095] The outer disk 432 is mounted on the inner disk 431. A cleaning steel brush 434 is provided at the periphery of the outer disk 432. The cleaning steel brush 434 is obliquely arranged and has liquid permeation grooves 436 spaced apart on it.

[0096] Furthermore, the rotating shaft 44 is hollow inside and has a flow channel 440, which is connected to the isolation cavity 420. The rotating shaft 44 has a through hole 442, which is connected to the flow channel 440.

[0097] The outer disk 432 of the upper cleaning disk 42 extends upward and is provided with a sleeve 438, on which a through hole 439 is provided that corresponds to and cooperates with the through hole 442;

[0098] When the upper cleaning disc 42 moves to its limit position along the axial direction of the rotating shaft 44, the through hole 442 and the through hole 439 are connected in a corresponding manner.

[0099] It should be noted that initially, the upper cleaning disc 42 and the lower cleaning disc 43 are tightly sealed together, and the isolation cavity 420 formed between the upper cleaning disc 42 and the lower cleaning disc 43 is not connected to the outside. However, the isolation cavity 420 is connected to the auxiliary filter chamber 5 through the connecting pipe 51. Therefore, once there is melt in the isolation cavity 420, it will be discharged into the auxiliary filter chamber 5 through the connecting pipe 51. When the cleaning mechanism 4 is working, as the upper cleaning disc 42 and the lower cleaning disc 43 move, the isolation cavity 420 opens and connects to the outside. The isolation cavity 420 is initially an empty cavity. Once it is opened, the melt will begin to enter. At this time, the second filter screen 14 and the third filter screen 15 brush off a large amount of adhering impurities. The impurities just flow with the melt into the space between the upper cleaning disc 42 and the lower cleaning disc 43, and enter the auxiliary filter chamber 5 through the connecting pipe 51, thereby achieving the purpose of discharging impurities from the filter material bin 1.

[0100] At the same time, when the upper cleaning disc 42 moves to its limit position, the through hole 439 on the sleeve 438 coincides with the through hole 442 on the rotating shaft 44. The impurities brushed off the first filter screen 13 also flow downward through the flow channel 440 and are transferred to the space between the upper cleaning disc 42 and the lower cleaning disc 43, and enter the auxiliary filter chamber 5 through the connecting pipe 51.

[0101] To further explain, the mesh count of the auxiliary filter 52 is the same as that of the third filter 15 because the impurities present in the auxiliary filter chamber 5 are a mixture of various impurities brushed off from the first filter 13, the second filter 14 and the third filter 15. Therefore, the filter with the largest mesh count is used to filter the impurities.

[0102] To further explain, when the upper cleaning disc 42 and the lower cleaning disc 43 overlap, that is, when the cleaning mechanism 4 is not working, after the melt in the auxiliary filter chamber 5 has been completely filtered, the auxiliary filter chamber 5 can be opened, the auxiliary filter screen 52 can be taken out from the auxiliary filter chamber 5 for cleaning, or a new auxiliary filter screen 52 can be directly replaced, while the filter material chamber 1 can still work normally without interference.

[0103] In addition, the outer disk 432 of the upper cleaning disk 42 is rotatably sealed with the rotating shaft 44, and a sealing ring is provided between the bottom of the sleeve 438 and the rotating shaft 44. Correspondingly, a sealing ring is provided between the outer disk 432 of the lower cleaning disk 43 and the top of the connecting pipe 51, so as to ensure that when the upper cleaning disk 42 and the lower cleaning disk 43 are in contact, a sealed isolation cavity 420 can be formed.

[0104] Example 4:

[0105] Referring to Example 1, the difference between Example 4 and Example 1 of this application lies in the following:

[0106] like Figure 6 , Figure 8 , Figure 9 , Figure 13 and Figure 14 As shown, the outer disk 432 is provided with a protruding guide block 435, and the rotating shaft 44 and the side wall of the connecting pipe 51 are both provided with spiral rotating grooves 437. When the upper cleaning disk 42 and the lower cleaning disk 43 move, the outer disk 432 is driven to rotate through the cooperation of the guide block 435 and the rotating groove 437.

[0107] It should be noted that the inner disk 431 and the outer disk 432 are separate. The outer disk 432 is rotated relative to the inner disk 431. Therefore, when the inner disk 431 moves, the guide block 435 on the outer disk 432 will cooperate with the corresponding rotating groove 437, which will drive the outer disk 432 to rotate along the rotating groove 437. This will cause the cleaning steel brush 434 to rotate and rub against the second filter screen 14 and the third filter screen 15, thereby further improving the cleaning efficiency of the cleaning steel brush 434.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An environmentally friendly waste filament melt filtration system, characterized in that, include: Filter silo (1) and transfer silo (2); The filter hopper (1) includes an upper filter hopper (11) and a lower filter hopper (12). The upper filter hopper (11) and the lower filter hopper (12) are sealed together. The top of the upper filter hopper (11) is provided with a melt inlet (111), and a horizontal first filter screen (13) is provided at the sealed installation part of the upper filter hopper (11) and the lower filter hopper (12). The bottom of the lower filter hopper (12) is provided with a melt outlet (120). The lower filter hopper (12) includes a first lower filter hopper (121) and a second lower filter hopper (122) nested together. A cylindrical second filter screen (14) is provided on the lower side wall of the first lower filter hopper (121), and a cylindrical second filter screen (14) is provided on the middle side wall of the second lower filter hopper (122). The third filter screen (15) also includes a cleaning mechanism (4), which includes a cleaning brush (41), an upper cleaning disc (42) and a lower cleaning disc (43). The cleaning brush (41) is located above the first filter screen (13) and rotates to clean the first filter screen (13). The upper cleaning disc (42) and the lower cleaning disc (43) are located at the position where the first lower filter chamber (121) and the second lower filter chamber (122) are interlocked. The upper cleaning disc (42) moves along the axial direction of the second filter screen (14) to clean the second filter screen (14), and the lower cleaning disc (43) moves along the axial direction of the third filter screen (15) to clean the third filter screen (15). The transfer hopper (2) is connected and disposed below the filter hopper (1). The transfer hopper (2) is connected to the melt outlet (120), and the bottom of the transfer hopper (2) is provided with a melt outlet (21). It also includes an auxiliary filter chamber (5), the top of which is detachably openable. The auxiliary filter chamber (5) is connected to the isolation cavity (420) formed by the closed upper cleaning disc (42) and the lower cleaning disc (43) through a connecting pipe (51). An auxiliary filter screen (52) is provided inside the auxiliary filter chamber (5). The mesh size of the auxiliary filter screen (52) is the same as that of the third filter screen (15). The auxiliary filter chamber (5) is connected to the transfer hopper (2) through a return pipe (53). After the upper cleaning disc (42) and the lower cleaning disc (43) are closed, the environmentally friendly waste filament melt and impurities in the isolation cavity (420) are guided to the auxiliary filter chamber (5) through the connecting pipe (51), filtered by the auxiliary filter screen (52), and then returned to the transfer silo (2) through the return pipe (53). Both the upper cleaning disc (42) and the lower cleaning disc (43) include an inner disc (431) and an outer disc (432). The outer disk (432) is covered on the inner disk (431). A cleaning steel brush (434) is provided at the periphery of the outer disk (432). The cleaning steel brush (434) is obliquely arranged and has liquid permeable grooves (436) spaced apart on it.

2. The environmentally friendly waste filament melt filtration system according to claim 1, characterized in that: After the environmentally friendly waste filament melt is fed into the filter bin (1) through the melt inlet (111), it undergoes triple filtration through the first filter screen (13), the second filter screen (14) and the third filter screen (15). The mesh counts of the first filter (13), the second filter (14), and the third filter (15) gradually increase.

3. The environmentally friendly waste filament melt filtration system according to claim 2, characterized in that: The first filter screen (13) has a mesh size of 100-150, the second filter screen (14) has a mesh size of 200-300, and the third filter screen (15) has a mesh size of 800-1500.

4. The environmentally friendly waste filament melt filtration system according to claim 1, characterized in that: The cleaning brush (41), the upper cleaning disc (42) and the lower cleaning disc (43) are all driven by the rotating shaft (44); The rotating shaft (44) is vertically inserted into the filter hopper (1), and the rotating shaft (44) drives the cleaning brush (41) to rotate. The upper cleaning disc (42) and the lower cleaning disc (43) are driven by two sets of linkage mechanisms (45) symmetrically arranged on the bottom plate of the first lower filter chamber (121), and reciprocate along the axial direction of the second filter screen (14) or the third filter screen (15), respectively.

5. The environmentally friendly waste filament melt filtration system according to claim 4, characterized in that: The rotating shaft (44) is provided with a thread (441), and the upper cleaning disc (42) is provided with a nut (421) that mates with the thread (441). The nut (421) is fixedly connected to the upper cleaning disc (42). When the rotating shaft (44) rotates, the upper cleaning disc (42) moves along the axial direction of the rotating shaft (44) through the engagement of the thread (441) and the nut (421).

6. The environmentally friendly waste filament melt filtration system according to claim 5, characterized in that: Each linkage mechanism (45) includes two sets of linkages (451) that are hinged to each other. The hinge point A at the hinged ends of the two sets of linkages (451) slides horizontally on the bottom plate of the first lower filter chamber (121), and the other end of the linkage (451) is respectively hinged to the upper cleaning disc (42) and the lower cleaning disc (43). When the upper cleaning disc (42) moves axially along the rotating shaft (44), the included angle α of the connecting rod (451) changes, causing the lower cleaning disc (43) to move synchronously along the rotating shaft (44).

7. The environmentally friendly waste filament melt filtration system according to claim 6, characterized in that: The inner disc (431) is hinged to the corresponding connecting rod (451). The inner disc (431) is provided with a sealing strip (433), and the nut (421) is fixedly installed on the inner disc (431) of the upper cleaning disc (42).

8. The environmentally friendly waste filament melt filtration system according to claim 7, characterized in that: The outer disk (432) is provided with a protruding guide block (435), and the rotating shaft (44) and the side wall of the connecting pipe (51) are both provided with a spiral rotating groove (437). When the upper cleaning disk (42) and the lower cleaning disk (43) move, the outer disk (432) is driven to rotate through the cooperation of the guide block (435) and the rotating groove (437).

9. The environmentally friendly waste filament melt filtration system according to claim 8, characterized in that: The rotating shaft (44) is hollow inside and has a flow channel (440) that connects to the isolation cavity (420). The rotating shaft (44) has a through hole (442) that connects to the flow channel (440). The outer disk (432) of the upper cleaning disk (42) extends upward and is provided with a sleeve (438), and the sleeve (438) is provided with a through hole (439) that corresponds to and cooperates with the through hole (442). When the upper cleaning disc (42) moves to its limit position along the axial direction of the rotating shaft (44), the through hole (442) and the through hole (439) are connected in a corresponding manner.

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