Raw material filtering device for nylon production and filtering process

Abstract

The invention relates to the technical field of nylon production devices, and discloses a raw material filtering device for nylon production and a filtering technology.The raw material filtering device comprises a filtering box body, the position, close to the bottom, of the surface of the filtering box body is fixedly sleeved with a supporting lantern ring frame, and one side of the surface of the filtering box body is fixedly connected with a dust collection component; through the arrangement of the filtering support, the split type filtering net, the distillation filtering frame and the electric heating net, it is ensured that impurities in raw materials for nylon production are removed, and then the quality of subsequent nylon production is improved; and bubbles, breakage or non-uniformity in a finished product caused by solid particles in the raw materials are avoided, meanwhile, abrasion or blockage of nylon production equipment caused by impurity particles in caprolactam is avoided, the service life of the nylon production equipment is prolonged, and the production efficiency of nylon is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nylon production devices, and more particularly to a raw material filtering device and a filtering process for nylon production. Background Art

[0002] Nylon is the first synthetic fiber to be widely used. Nylon can be divided into different types according to its chemical structure and composition, such as "Nylon 6, Nylon 66, Nylon 610", etc. Among them, the production raw material of Nylon 6 is caprolactam. When producing Nylon 6, it is necessary to first carry out a polymerization reaction on its raw material caprolactam, and form the polymerized nylon raw material into a molten state. Next, it is extruded through a die by an extruder into the required form, and finally the extruded Nylon 6 is cooled and cut into small particles. However, during the production process of the raw material caprolactam, especially during the synthesis of caprolactam, there may be some unreacted raw materials, reaction by-products or solid particles generated due to improper process operations; In the subsequent nylon production of caprolactam, the solid particles inside it may cause bubbles, fractures or unevenness in the finished product, thereby affecting the mechanical properties and durability of Nylon 6. Moreover, the impurity particles in caprolactam may cause wear or blockage to the nylon production equipment, especially the pipelines and reactors in the melt extrusion or polymerization reaction, and may even interrupt the production process, thereby reducing the service life of the nylon production equipment and the production efficiency of nylon. In addition, during the synthesis of caprolactam, in order to ensure the smooth progress of the reaction, a solvent is generally added. However, after the reaction, the solvent is often no longer useful and may be mixed with the reaction product caprolactam, and the purity of the caprolactam mixed with the solvent will be affected, thereby resulting in a reduction in the quality of the produced nylon; Therefore, we propose a raw material filtering device and a filtering process for nylon production to solve the problems raised above. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a raw material filtering device and a filtering process for nylon production to solve the technical problems raised in the background art.

[0004] To achieve the above object, the present invention provides the following technical solutions: A raw material filtering device and filtering process for nylon production, including a main filtering box body, a supporting sleeve ring frame fixedly sleeved on the surface of the main filtering box body near the bottom position, a dust suction member fixedly connected to one side position of the surface of the main filtering box body, communication hoses are respectively opened on both sides of the dust suction member away from the surface of the main filtering box body, a filtering support fixedly sleeved on the surface of the main filtering box body near the top position, sealing sliding plates are respectively movably connected to both sides inside the filtering support, dust collection boxes are respectively movably connected to both sides of the top of the filtering support, a feeding frame is movably connected to the adjacent side surface of the dust collection box, the feeding frame is fixedly connected to the middle position of the filtering support, a split filter screen is movably connected inside the main filtering box body near the top position, a distillation filtering frame is opened inside the main filtering box body near the bottom position, a distillation recovery barrel is opened at the center position of the distillation filtering frame, a raw material discharge pipe is opened on one side of the surface of the main filtering box body and at the top position of the fixedly sleeved supporting sleeve ring frame, and a distillation recovery pipe is opened at the bottom position of the main filtering box body.

[0005] By providing a filtering support, a split filter screen, and a distillation filtering frame, it is beneficial to filter the nylon raw materials through the split filter screen inside the filtering support before nylon production, and distill and purify the internally mixed solution of the filtered nylon raw materials through the distillation filtering frame, so as to ensure the removal of impurities inside the raw materials for nylon production, thereby improving the quality of subsequent nylon production, avoiding the appearance of bubbles, fractures, or unevenness in the finished product caused by solid particles inside the raw materials, and at the same time avoiding the wear or blockage of the nylon production equipment by impurity particles in the raw material caprolactam, increasing the service life of the nylon production equipment and the production efficiency of nylon.

[0006] In a preferred embodiment, dust removal cavities are respectively opened at the positions where the filtering support is movably connected with the sealing sliding plates, magnet installation grooves are respectively opened at both sides of the top of the filtering support, installation magnets are respectively opened at the positions of the magnet installation grooves, regularly arranged dust collection holes are respectively opened at the positions where the dust collection boxes are movably connected to the top of the filtering support, a filtering cavity is opened at the middle position of the filtering support, an annular groove is opened on the inner wall of the filtering cavity near the bottom position, and neatly arranged cleaning brushes are opened at the bottom position of the annular groove. By providing the dust removal cavity and the cleaning brushes, it is beneficial to clean the impurities inside the filter screen holes through the cleaning brushes after filtering the nylon raw materials, avoiding the blockage of the filter screen holes by impurities, and collecting the impurities on the surface of the filter screen when the filter screen enters the dust removal cavity, avoiding the impurities on the surface of the filter screen from affecting the subsequent filtering effect.

[0007] In a preferred embodiment, a dust collection cavity is formed inside the dust collection box. An activity clamping plate is movably sleeved at the bottom of the dust collection box. A conical dust guiding hole is formed on the surface of the activity clamping plate. One end of the connecting hose far away from the dust suction component is movably connected to one side of the surface of the dust collection box. By providing the activity clamping plate and the conical dust guiding hole, when the filtered impurities are collected and enter the inside of the dust collection cavity, due to the external shape structure of the conical dust guiding hole, it is possible to prevent the entering impurities from entering the top of the filter screen again.

[0008] In a preferred embodiment, a handle is fixedly connected to the side of the plugging slide plate far away from the feeding rack. One side surface of the plugging slide plate far away from the handle is fixedly connected to one side of the split filter screen. A filter groove is formed at the top of the split filter screen. A row of neatly arranged circular through holes is formed at the bottom of the filter groove. By providing the filter groove and the plugging slide plate, after filtering the nylon raw materials, the filtered impurities can be collected through the filter groove, and through the plugging slide plate, when the impurities in the filter groove are collected for dust collection, it is possible to prevent external air from entering and affecting the dust collection effect.

[0009] In a preferred embodiment, a filter cavity is formed inside the filter box body. A diversion cone plate is fixedly connected inside the filter box body and near the top. A row of neatly arranged liquid inlet groove holes is formed at the top of the inner wall of the filter cavity at the position where the diversion cone plate is fixedly connected. A connecting cavity is formed inside the filter box body at the position where the liquid inlet groove holes are formed. Liquid outlet groove holes are formed at the bottom of the inner wall of the filter cavity at the position of the diversion cone plate. The liquid inlet groove holes and the liquid outlet groove holes are interconnected through the connecting cavity. A recovery diversion cone is formed at the center of the bottom of the diversion cone plate. By providing the liquid inlet groove holes, the connecting cavity, the liquid outlet groove holes, the diversion cone plate, and the recovery diversion cone, it is beneficial to divert the nylon raw materials after primary filtration to the inside of the liquid inlet groove holes through the diversion cone plate, and through the connecting cavity and the liquid outlet groove holes, the initially filtered raw materials enter the inside of the distillation filter rack, enabling the raw materials to be further distilled and purified, and through the recovery diversion cone, the solution that has become vapor is diverted and collected, preventing the separated solution from entering the raw materials again.

[0010] In a preferred embodiment, a distillation groove is formed at the position of the distillation filter rack close to the inner wall of the filter box body. An electric heating grid is formed inside the distillation filter rack and near the periphery. A distillation recovery cavity is formed inside the distillation recovery barrel. A pipeline connection hole is formed at the bottom of the distillation recovery cavity. One end of the pipeline connection hole is fixedly connected to one end of the distillation recovery pipe. By providing the electric heating grid and the distillation recovery barrel, it is beneficial to accurately control the temperature of the raw materials through the electric heating grid, and through the distillation recovery barrel, the distilled solution inside the raw materials can be collected and reused, preventing waste of resources.

[0011] The technical effects and advantages of the present invention: The present invention is provided with a filtering support, a split-type filter screen, a distillation filtering rack, and an electric heating grid, which is beneficial to filtering nylon raw materials through the split-type filter screen inside the filtering support before nylon production, and distilling and purifying the internally mixed solution of the filtered nylon raw materials through the distillation filtering rack and the electric heating grid, thereby ensuring the removal of impurities inside the raw materials for nylon production, further improving the quality of subsequent nylon production, avoiding the occurrence of bubbles, fractures, or unevenness in the finished product caused by solid particles inside the raw materials, and at the same time avoiding the wear or blockage of nylon production equipment caused by impurity particles in caprolactam, increasing the service life of nylon production equipment and the production efficiency of nylon; The present invention is provided with a filtering box body, a filtering support, a split-type filter screen, a distillation filtering rack, and an electric heating grid, which is beneficial to reducing the manual operation steps and the labor intensity of workers when filtering the raw materials for nylon production, while increasing the filtering efficiency and quality of nylon production raw materials, avoiding insufficient filtering of raw materials caused by human errors, and further improving the purity of nylon production raw materials; The present invention is provided with a plugging slide plate, a filtering support, a dust suction component, a dust collection box, and a split-type filter screen, which is beneficial to driving the split-type filter screen into the dust removal cavity through the plugging slide plate after filtering nylon production raw materials, enabling the circular through holes opened in the split-type filter screen to be cleaned by cleaning brushes, avoiding the blockage of circular through holes by impurities, and adsorbing the impurities cleaned inside the filtering groove into the dust collection box for subsequent processing under the operation of the dust suction component, ensuring the cleanliness of the surface of the split-type filter screen, preventing the subsequent filtering use of the split-type filter screen from being affected, and improving the reliability of the filtering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention.

[0013] Figure 2 It is a schematic view of the overall structure of the present invention.

[0014] Figure 3 It is a schematic cross-sectional view of the filtering support structure of the present invention.

[0015] Figure 4 It is a schematic view of the dust collection box structure of the present invention.

[0016] Figure 5 It is a schematic view of the plugging slide plate structure of the present invention.

[0017] Figure 6 It is a schematic cross-sectional view of the filtering box body structure of the present invention.

[0018] The reference numerals are: 1. main body of the filtration box; 101. filtration inner cavity; 102. liquid inlet groove hole; 103. communicating inner cavity; 104. liquid outlet groove hole; 2. support collar frame; 3. dust suction component; 4. communicating hose; 5. filtration support; 501. dust removal inner cavity; 502. magnet installation groove; 503. dust collection hole; 504. filtration cavity; 505. annular groove; 506. cleaning brush; 6. plugging slide plate; 601. handle; 7. dust collection box; 701. dust collection inner cavity; 702. movable clamping plate; 703. conical dust guiding hole; 8. feeding rack; 9. split filter screen; 901. filtration groove; 902. circular through hole; 10. distillation filtration rack; 1001. distillation tank; 11. distillation recovery barrel; 1101. distillation recovery cavity; 1102. pipe connection hole; 12. raw material discharge pipe; 13. distillation recovery pipe; 14. installation magnet block; 15. electric heating mesh; 16. diversion cone plate; 17. recovery diversion cone. Detailed implementation mode

[0019] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of each structure described in the following implementation modes are merely examples. A raw material filtration device and filtration process for nylon production involved in the present invention are not limited to the structures described in the following implementation modes. All other implementation modes obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] Referring to Figures 1-6 As shown, the present invention provides a raw material filtration device and filtration process for nylon production, including a main body 1 of a filtration box, characterized in that: a support collar frame 2 is fixedly sleeved on the surface of the main body 1 of the filtration box near the bottom position, a dust suction component 3 is fixedly connected to one side position of the surface of the main body 1 of the filtration box, communicating hoses 4 are provided on both sides of the dust suction component 3 far away from the surface of the main body 1 of the filtration box, a filtration support 5 is fixedly sleeved on the surface of the main body 1 of the filtration box near the top position, plugging slide plates 6 are movably connected to both sides inside the filtration support 5, dust collection boxes 7 are movably connected to both sides of the top of the filtration support 5, a feeding rack 8 is movably connected to the adjacent side surface of the dust collection box 7, the feeding rack 8 is fixedly connected to the middle position of the filtration support 5, a split filter screen 9 is movably connected inside the main body 1 of the filtration box near the top position, a distillation filtration rack 10 is provided inside the main body 1 of the filtration box near the bottom position, a distillation recovery barrel 11 is provided at the center of the distillation filtration rack 10, a raw material discharge pipe 12 is provided on one side of the surface of the main body 1 of the filtration box and at the top position of the fixedly sleeved support collar frame 2, and a distillation recovery pipe 13 is provided at the bottom position of the main body 1 of the filtration box.

[0021] In this embodiment: By providing a filter bracket 5, a split filter screen 9, and a distillation filter bracket 10, it is beneficial to filter the nylon raw materials through the split filter screen 9 inside the filter bracket 5 before nylon production, and distill and purify the internally mixed solution of the filtered nylon raw materials through the distillation filter bracket 10, so as to ensure the removal of impurities inside the raw materials for nylon production, thereby improving the quality of subsequent nylon production, avoiding bubbles, fractures, or unevenness in the finished product caused by solid particles inside the raw materials, and at the same time avoiding wear or blockage of the nylon production equipment by impurity particles in the raw material caprolactam, increasing the service life of the nylon production equipment and the production efficiency of nylon.

[0022] Refer to Figure 3 As shown, dust removal cavities 501 are provided at the positions where the filter bracket 5 is movably connected to the plugging slide plate 6. Magnet installation grooves 502 are provided on both sides at the top of the filter bracket 5. Installation magnets 14 are provided in the magnet installation grooves 502. Regularly arranged dust collection holes 503 are provided at the positions where the filter bracket 5 is movably connected to the dust collection box 7 at the top. A filter cavity 504 is provided in the middle of the filter bracket 5. An annular groove 505 is provided on the inner wall of the filter cavity 504 near the bottom. Regularly arranged cleaning brushes 506 are provided at the bottom of the annular groove 505.

[0023] In this embodiment: By providing the dust removal cavity 501 and the cleaning brushes 506, it is beneficial to clean the impurities inside the filter screen holes through the cleaning brushes 506 after filtering the nylon raw materials, avoiding blockage of the filter screen holes by impurities, and collecting the impurities on the surface of the filter screen when the filter screen enters the inside of the dust removal cavity 501, avoiding the impurities on the surface of the filter screen from affecting the subsequent filtering effect.

[0024] Refer to Figure 4 As shown, a dust collection cavity 701 is provided inside the dust collection box 7. A movable clamping plate 702 is movably sleeved at the bottom of the dust collection box 7. A tapered dust guiding hole 703 is provided on the surface of the movable clamping plate 702. One end of the connecting hose 4 far from the dust suction member 3 is movably connected to one side of the surface of the dust collection box 7.

[0025] In this embodiment: By providing the movable clamping plate 702 and the tapered dust guiding hole 703, it is beneficial to prevent the entering impurities from entering the top of the filter screen again due to the outer shape structure of the tapered dust guiding hole 703 when collecting the filtered impurities into the inside of the dust collection cavity 701.

[0026] Refer to Figure 5As shown, a handle 601 is fixedly connected to one side of the plugging slide plate 6 away from the feeding rack 8. One side surface of the plugging slide plate 6 away from the handle 601 is fixedly connected to one side of the split filter screen 9. A filter groove 901 is formed at the top of the split filter screen 9, and neatly arranged circular through holes 902 are formed at the bottom of the filter groove 901.

[0027] In this embodiment: By providing the filter groove 901 and the plugging slide plate 6, it is beneficial to collect the filtered impurities through the filter groove 901 after filtering the nylon raw materials, and through the plugging slide plate 6, when the impurities inside the filter groove 901 are collected for dust collection, it can prevent external air from entering and affecting the dust collection effect.

[0028] Refer to Figure 6 As shown, a filter inner cavity 101 is formed inside the filter box main body 1. A flow guiding conical plate 16 is fixedly connected inside the filter box main body 1 and near the top position. Neatly arranged liquid inlet groove holes 102 are formed at the top of the inner wall of the filter inner cavity 101 at the position where the flow guiding conical plate 16 is fixedly connected. A communication inner cavity 103 is formed inside the filter box main body 1 at the position where the liquid inlet groove holes 102 are formed. Liquid outlet groove holes 104 are formed at the bottom of the inner wall of the filter inner cavity 101 at the position of the flow guiding conical plate 16. The liquid inlet groove holes 102 and the liquid outlet groove holes 104 are interconnected through the communication inner cavity 103. A recovery flow guiding cone 17 is formed at the center of the bottom of the flow guiding conical plate 16.

[0029] In this embodiment: By providing the liquid inlet groove holes 102, the communication inner cavity 103, the liquid outlet groove holes 104, the flow guiding conical plate 16, and the recovery flow guiding cone 17, it is beneficial to guide the nylon raw materials after primary filtration to the inside of the liquid inlet groove holes 102 through the flow guiding conical plate 16, and through the communication inner cavity 103 and the liquid outlet groove holes 104, the initially filtered raw materials enter the inside of the distillation and filtration rack 10, enabling the raw materials to be further distilled and purified, and through the recovery flow guiding cone 17, the solution that has become vapor is guided and collected, preventing the separated solution from entering the raw materials again.

[0030] Refer to Figure 6 As shown, a distillation groove 1001 is formed inside the distillation and filtration rack 10 near the inner wall of the filter box main body 1. Electric heating meshes 15 are formed inside the distillation and filtration rack 10 and near the peripheral edges all around. A distillation recovery cavity 1101 is formed inside the distillation recovery barrel 11. A pipeline connection hole 1102 is formed at the bottom of the distillation recovery cavity 1101. One end of the pipeline connection hole 1102 is fixedly connected to one end of the distillation recovery pipe 13.

[0031] In this embodiment: By providing the electric heating meshes 15 and the distillation recovery barrel 11, it is beneficial to precisely control the temperature of the raw materials through the electric heating meshes 15, and through the distillation recovery barrel 11, the distilled solution inside the raw materials can be collected and reused, preventing waste of resources.

[0032] Working principle of the present invention: S1. First, when preparing to filter the raw materials for nylon production, the raw materials are first injected through the top position of the feeding rack 8, so that the raw materials enter the inside of the filtration cavity 504 opened in the filtration support 5 through the feeding rack 8. Then, the raw materials are initially filtered through the split filter screen 9 movably connected inside the filtration cavity 504, and the solid particle impurities inside the raw materials are blocked through the circular through hole 902 opened in the filtration groove 901. Then, the initially filtered raw materials enter the inside of the filtration inner cavity 101 opened in the filtration box body 1 through the split filter screen 9. Then, the raw materials are blocked by the diversion cone plate 16 fixedly connected inside the filtration inner cavity 101, so that the raw materials flow to the position of the liquid inlet groove hole 102 opened on the inner wall of the filtration inner cavity 101. Then, the raw materials entering the liquid inlet groove hole 102 reach the position of the liquid outlet groove hole 104 through the communication inner cavity 103, and then flow out through the liquid outlet groove hole 104 to the position of the distillation tank 1001 opened at the top of the distillation filtration rack 10. At this time, the electric heating mesh 15 inside the distillation filtration rack 10 is powered on, so that the electric heating mesh 15 generates heat to heat the raw materials inside the distillation tank 1001. Then, the solvent vapor generated by heating rises to the bottom position of the diversion cone plate 16, and then the solution gradually cooled and liquefied after being blocked by the diversion cone plate 16 is guided by the recovery diversion cone 17 and dripped into the inside of the distillation recovery barrel 11 opened in the middle of the distillation filtration rack 10 for collection. Then, after the raw material filtration and distillation are completed, at this time, the filtered and purified raw materials are discharged by opening the raw material discharge pipe 12, and then the solvent collected inside the distillation recovery cavity 1101 is recovered by opening the distillation recovery pipe 13; S2. Then, after the raw material filtration is completed, at this time, pull the plugging slide plate 6 inside the dust removal cavity 501 opened in the filtration bracket 5, so that the grip 601 drives the plugging slide plate 6 and the split filter screen 9 to move into the dust removal cavity 501. Then, when the split filter screen 9 is moving, at this time, the cleaning brush 506 opened in the annular groove 505 cleans the bottom of the split filter screen 9, so that the cleaning brush 506 pushes the impurities blocked in the circular through hole 902 into the filter groove 901. Then, when the split filter screen 9 completely enters the dust removal cavity 501, stop pulling the plugging slide plate 6 at this time, and then turn on the dust suction component 3 on one side of the filter box body 1, so that the dust suction component 3 operates and adsorbs the air inside the dust collection cavity 701 opened in the dust collection box 7 through the connecting hose 4. Then, a negative pressure is formed inside the dust collection cavity 701, so that the dust collection cavity 701 adsorbs the impurities inside the filter groove 901 through the conical dust guiding hole 703 and the dust collection holes 503, and the impurities enter the position inside the dust collection cavity 701 for collection. Then, after cleaning the split filter screen 9, it can be reset. Then, after the dust collection box 7 performs the dust collection operation multiple times, at this time, pull out the connecting hose 4 on one side of the dust collection box 7, then pull the dust collection box 7 away from the top position of the filtration bracket 5, then pull out the movable clamping plate 702 at the bottom of the dust collection box 7, then pour out the impurities inside the dust collection cavity 701, then reset the movable clamping plate 702 and place it back on the top position of the filtration bracket 5, and make the mounting magnet 14 inside the magnet mounting groove 502 adsorb and fix the bottom of the dust collection box 7 to complete.

[0033] Finally, the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A raw material filtering device for nylon production, comprising a filter box body (1), characterized in that: A support collar frame (2) is fixedly sleeved on the surface of the filter box body (1) and near the bottom, a dust suction component (3) is fixedly connected to one side of the surface of the filter box body (1), and connecting hoses (4) are provided on both sides of the dust suction component (3) away from the surface of the filter box body (1), a filter bracket (5) is fixedly sleeved on the surface of the filter box body (1) and near the top, and blocking slide plates (6) are movably connected to both sides of the inside of the filter bracket (5), and a dust collecting box (7) is movably connected to both sides of the top of the filter bracket (5), and a surface position adjacent to one side of the dust collecting box (7) is provided. A feed rack (8) is movably connected, and the feed rack (8) is fixedly connected to the middle position of the filter bracket (5). A split filter screen (9) is movably connected inside the filter box body (1) and near the top position. A distillation filter rack (10) is provided inside the filter box body (1) and near the bottom position. A distillation recovery barrel (11) is provided at the center position of the distillation filter rack (10). A raw material discharge pipe (12) is provided on one side of the surface of the filter box body (1) and located at the top position of the fixed sleeve support ring frame (2). A distillation recovery pipe (13) is provided at the bottom position of the filter box body (1).

2. A raw material filtering device for nylon production according to claim 1, characterized in that: The filter support (5) is provided with a dust removal inner cavity (501) at a position where it is movably connected to the blocking slide plate (6), magnet mounting grooves (502) are provided at both sides of the top of the filter support (5), mounting magnetic blocks (14) are provided at the magnet mounting grooves (502), neatly arranged dust collecting holes (503) are provided at the top of the filter support (5) and at a position where it is movably connected to the dust collecting box (7), a filter cavity (504) is provided at the middle of the filter support (5), an annular groove (505) is provided on the inner wall of the filter cavity (504) and near the bottom, and neatly arranged cleaning brushes (506) are provided at the bottom of the annular groove (505).

3. A raw material filtering device for nylon production according to claim 1, characterized in that: A dust collecting cavity (701) is provided inside the dust collecting box (7), a movable clamping plate (702) is movably sleeved at the bottom of the dust collecting box (7), a conical dust guiding hole (703) is provided on the surface of the movable clamping plate (702), and an end of the connecting hose (4) away from the dust collecting component (3) is movably connected to a side of the surface of the dust collecting box (7).

4. A raw material filtering device for nylon production according to claim 1, characterized in that: A handle (601) is fixedly connected to a side of the blocking slide (6) away from the feed rack (8); a side of the blocking slide (6) away from the handle (601) is fixedly connected to a side of the split filter screen (9); a filter slot (901) is provided at the top of the split filter screen (9); and neatly arranged circular through holes (902) are provided at the bottom of the filter slot (901).

5. The raw material filtering device for nylon production according to claim 1, characterized in that: A filtering cavity (101) is provided at an internal position of the filtering box body (1), a guide cone plate (16) is fixedly connected to the inside of the filtering box body (1) and near the top position, neatly arranged liquid inlet slots (102) are provided on the inner wall of the filtering cavity (101) and at the top position where the guide cone plate (16) is fixedly connected, a connecting cavity (103) is provided at an internal position where the liquid inlet slots (102) are provided on the filtering box body (1), a liquid outlet slot hole (104) is provided on the inner wall of the filtering cavity (101) and at the bottom position of the guide cone plate (16), the liquid inlet slot hole (102) and the liquid outlet slot hole (104) are connected to each other via the connecting cavity (103), and a recovery guide cone (17) is provided at the center position of the bottom of the guide cone plate (16).

6. A raw material filtering device for nylon production according to claim 1, characterized in that: The distillation filter rack (10) is provided with a distillation tank (1001) near the inner wall of the filter box body (1), the distillation filter rack (10) is provided with an electric heating net (15) near the edge thereof, the distillation recovery barrel (11) is provided with a distillation recovery chamber (1101) inside, the bottom of the distillation recovery chamber (1101) is provided with a pipeline connection hole (1102), and the pipeline connection hole (1102) is fixedly connected to one end of the distillation recovery pipe (13).

7. A filtering process for a nylon production raw material filtering device, using a nylon production raw material filtering device as claimed in claims 1 to 6, characterized in that: The following steps are involved: S1. First, when preparing to filter the raw materials for the production of nylon, the raw materials are first injected through the top position of the feed frame (8), so that the raw materials enter the internal position of the filter cavity (504) opened by the filter support (5) through the feed frame (8), and then the raw materials are filtered for the first time through the split filter screen (9) movably connected inside the filter cavity (504), and the solid particle impurities inside the raw materials are blocked through the circular through hole (902) opened in the filter slot (901), and then the raw materials that have been filtered for the first time enter the internal position of the filter cavity (101) opened by the filter box body (1) through the split filter screen (9), and then the raw materials are blocked by the guide cone plate (16) fixedly connected inside the filter cavity (101), so that the raw materials flow to the position of the liquid inlet slot hole (102) opened on the inner wall of the filter cavity (101), and then the raw materials that have entered the position of the liquid inlet slot hole (102) are filtered through the connecting cavity (101). 3) reaching the position of the liquid outlet slot hole (104), and then flowing out through the liquid outlet slot hole (104) to the position of the distillation tank (1001) opened at the top of the distillation filter rack (10), at which time the electric heating net (15) inside the distillation filter rack (10) is energized so that the electric heating net (15) generates heat to heat the raw materials inside the distillation tank (1001), and then the solvent vapor generated by the heating rises to the bottom position of the guide cone plate (16), and then the liquefied solution is blocked by the guide cone plate (16) and gradually cooled and guided by the recovery guide cone (17) to drip into the internal position of the distillation recovery barrel (11) opened at the middle position of the distillation filter rack (10) for collection, and then after the filtration and distillation of the raw materials is completed, the raw material discharge pipe (12) is opened to discharge the filtered and purified raw materials, and then the distillation recovery pipe (13) is opened to recover the solvent collected inside the distillation recovery chamber (1101); S2, after the raw material is filtered, the blocking slide plate (6) inside the dust removal cavity (501) opened by the filter bracket (5) is pulled, so that the handle (601) drives the blocking slide plate (6) and the split filter (9) to move into the dust removal cavity (501), and then when the split filter (9) moves, the cleaning brush (506) opened in the annular groove (505) cleans the bottom of the split filter (9), so that the cleaning brush (506) pushes the impurities blocked in the circular through hole (902) into the filter groove (901), and then when the split filter (9) completely enters the dust removal cavity (501), the blocking slide plate (6) is stopped, and the dust suction component (3) on one side of the filter box body (1) is opened, so that the dust suction component (3) operates and absorbs the air inside the dust collection cavity (701) opened by the dust collection box (7) through the connecting hose (4), and then Afterwards, negative pressure is formed inside the dust collecting cavity (701), so that the dust collecting cavity (701) absorbs impurities inside the filter groove (901) through the conical dust guide hole (703) and the dust collecting hole (503), and the impurities enter the dust collecting cavity (701) for collection, and then reset after the split filter screen (9) is cleaned. Then, after the dust collecting operation is performed multiple times in the dust collecting box (7), the connecting hose (4) on one side of the dust collecting box (7) is pulled out, and then the dust collecting box (7) is pulled away from the top position of the filter bracket (5), and then the movable card plate (702) at the bottom of the dust collecting box (7) is pulled out, and then the impurities inside the dust collecting cavity (701) are dumped, and then the movable card plate (702) is reset and re-placed at the top position of the filter bracket (5), and the installation magnetic block (14) inside the magnetic installation groove (502) is adsorbed and fixed to the bottom of the dust collecting box (7).

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