Glass fiber waste regeneration treatment process

Abstract

The invention discloses a regeneration treatment process for glass fiber waste. The regeneration treatment process comprises the following steps: step 1, pre-cleaning the glass fiber waste; 2, the pre-cleaned glass fiber waste is put into a double-tower-knife pulverizer to be pulverized into powder, and then the powder is further ground through a four-grinding-roller grinder; 3, the glass fiber waste powder is fed into a quadruple cambered surface magnetic iron removal machine to remove scrap iron; fourthly, the glass fiber waste powder is heated and dehumidified through an electric heating conveyor and a dehumidifier; 5, the glass fiber waste powder is fed into a metal separation device, metal filings are removed, and a glass fiber powder certified product is formed; and 6, feeding the glass fiber powder certified product into a material receiving device, and carrying out gas filtration and collection. The waste glass fibers can be safely and effectively treated, scrap iron and other metal powder in the glass fiber waste can be efficiently removed, integrated production is achieved, the production speed is high, the production efficiency is high, the production cost can be reduced, and energy is saved.

Description

Technical Field

[0001] The invention relates to the field of glass fiber waste treatment, and in particular to a glass fiber waste regeneration treatment process. Background Art

[0002] Glass fiber is an inorganic non-metallic material with excellent performance. It has many types. Its advantages are good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. It is made of six kinds of minerals, namely pyrophyllite, quartz sand, limestone, dolomite, colemanite and magnesia borax, through high-temperature melting, wire drawing, winding and weaving. The diameter of its single filament is from several microns to more than twenty microns, which is equivalent to 1 / 20-1 / 5 of a hair. Each bundle of fiber strands is composed of hundreds or even thousands of single filaments. Glass fiber is a very good substitute for metal materials. With the rapid development of the market economy, glass fiber has become an indispensable raw material for industries such as construction, transportation, electronics, electrical, chemical, metallurgy, environmental protection and national defense. Due to its wide application in many fields, glass fiber is increasingly valued by people. With the promotion and development of glass fiber, there are more and more scraps in production, and more and more glass fiber is scrapped and recycled in various industries, which has brought great negative impact and pollution risks to environmental governance. At present, recycling and reusing glass fiber waste is an effective treatment method, but the existing technology has low efficiency, high energy consumption and high cost for the regeneration and processing of waste glass fiber, especially the treatment efficiency of iron filings and other metals in glass fiber waste is poor, and the removal efficiency is relatively low. How to improve the regeneration and processing efficiency of waste glass fiber and improve the removal efficiency of iron filings and other metals in waste glass fiber is a topic that the industry urgently needs to research and develop. Summary of the invention

[0003] In order to solve certain technical problems existing in the prior art, the purpose of the present application is to provide a glass fiber waste regeneration process that can safely and effectively treat waste glass fibers, efficiently remove iron filings and other metal powders in glass fiber waste, and has a fast production speed, low production cost and high production efficiency.

[0004] In order to solve the above existing technical problems, the purpose of this application is achieved by adopting the following technical solution: a glass fiber waste recycling process, comprising the following steps:

[0005] Step 1: Pre-clean the glass fiber waste with a length of 50-80 mm, first soak it with solution, and then flush it;

[0006] Step 2: Put the pre-cleaned glass fiber waste into a double-turret knife crusher to crush it into powder, and then further grind it into glass fiber waste powder through a four-roller grinder;

[0007] Step 3: Feed the glass fiber waste powder into the quadruple arc magnetic de-ironing machine to remove iron filings;

[0008] Step 4: heating and dehumidifying the glass fiber waste powder through an electric heat conveyor and a dehumidifier to make the moisture content less than 0.5%;

[0009] Step 5: Send the waste glass fiber powder into the metal separation device to remove metal chips to form authentic glass fiber powder;

[0010] Step 6: Send the genuine glass fiber powder into the collecting device for filtered gas collection.

[0011] Preferably, the double-tower blade crusher includes a left box body and a right box body, a feed hopper arranged on the top of the left box body and the right box body, and a discharge hopper arranged on the bottom of the left box body and the right box body; the left box body and the right box body are both provided with a tower-shaped blade group and a crushing motor that drives the tower-shaped blade group to rotate, the tower-shaped blade group includes a crushing shaft, a plurality of circular crushing blades whose centers are arranged on the crushing shaft and whose diameters gradually increase from top to bottom, and crushing knife lines arranged on the outer circles of the circular crushing blades, and the crushing knife lines on the circular crushing blades gradually become thinner from top to bottom, and the circular crushing blades in the left box body and the circular crushing blades in the right box body are arranged crosswise up and down.

[0012] Preferably, the left box body and the right box body are connected by a fastening device, a sealing strip is provided at the connection between the left box body and the right box body, and the fastening device includes an adapter provided on the left box body, an adapter column connected to the adapter, a clamping ring connected to the end of the adapter column, and a clamping member provided on the right box body and engaged with the clamping ring.

[0013] Preferably, the four-roller grinder includes a grinding box, two groups of grinding components symmetrically arranged on the grinding box, and a feed pipe arranged on the top of the grinding box and between the two groups of grinding components. The grinding component includes two grinding rollers arranged vertically in the grinding box, and a grinding motor arranged on the grinding box and connected to the ends of the two grinding rollers through belts.

[0014] Preferably, a rectangular feed port is provided on the top of the grinding box between the two groups of grinding components, and a diffusion hopper connected to the rectangular feed port is provided on the feed pipe.

[0015] Preferably, the four-link arc-surface magnetic iron removal machine includes a suction box, an annular electromagnet arranged at the feed port at the top of the suction box, an iron scraping sheet arranged on the suction box and in contact with the annular electromagnet, and an iron scrap collection box arranged at the bottom of the suction box, and the annular electromagnet is composed of four arc-surface electromagnets; a conveying box connected to the annular electromagnet is provided on the side of the suction box, the electric heat conveyor and dehumidifier are arranged on the conveying box, and an angled channel connected to the bottom of the multi-link integrated metal separation device is provided at the discharge port of the conveying box, and the angled channel is inclined downward and outward at an angle of 5°-45°.

[0016] Preferably, the multi-integrated metal separation device includes a Z-shaped multi-channel, a metal chip collection box arranged at the bottom of the Z-shaped multi-channel, and a plurality of feeding fans arranged on the Z-shaped multi-channel, the Z-shaped multi-channel is composed of mutually intersecting and upwardly inclined sub-channels, the feeding fan is arranged at the tail of the sub-channel, the tail of the sub-channel is provided with a filter screen connected to the feeding fan, and adjacent sub-channels intersect to form a 90° angle.

[0017] Preferably, the branch channel adopts a hollow rectangular parallelepiped structure or a hollow cylindrical structure.

[0018] Preferably, the material collecting device includes an upper buffer funnel, a middle buffer bin and a lower material collecting bag, the buffer funnel is connected to the top of the multi-integrated metal separation device, the buffer bin is provided with an air filter cloth cylinder connected to the buffer funnel and the material collecting bag, the air filter cloth cylinder is connected to the buffer funnel through a first connecting pipe, the air filter cloth cylinder is connected to the material collecting bag through a second connecting pipe, the buffer funnel and the buffer bin are both provided with air filter assemblies, and the air filter assemblies are provided with several layers of air filter plates.

[0019] Preferably, an air filter support plate is provided at the air inlet of the air filter assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, since a double-tower knife crusher is adopted in the process, waste glass fibers can be quickly crushed into powder from large to small, with high crushing efficiency, fast speed, and saving of electric energy for crushing by multiple machines; since a four-link arc-surface magnetic iron removal machine is adopted to remove iron filings in waste glass fiber powder, iron filings can be removed online and continuously, with high iron removal efficiency, fast iron removal speed, high degree of automation, and the ability to automatically control the power supply to be turned on in the material area and turned off in the material-free area, thus avoiding the waste of electric energy in the material-free area when the machine is working, thereby saving electric energy for magnetic iron filings; since a multi-link integrated metal separation device is adopted to remove metal filings, the removal efficiency is high, and the effect of removing metal filings is very prominent; finally, a material collecting device is used to collect genuine glass fiber powder; waste glass fibers can be safely and effectively processed, iron filings and other metal powders in waste glass fibers can be efficiently removed, integrated production can be realized, production speed is fast, production efficiency is high, production cost can be reduced, and energy can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the process structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the double-tower knife crusher in the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the double-tower knife crusher in the present invention;

[0025] Figure 4 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 5 It is a structural schematic diagram of a four-roller grinding machine in the present invention;

[0027] Figure 6 It is a schematic diagram of the internal structure of the four-roller grinding machine in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the quadruple arc surface magnetic de-ironing machine in the present invention;

[0029] Figure 8 It is a schematic diagram of the internal structure of the quadruple arc magnetic demagnetizer in the present invention;

[0030] Fig. 9 This is a schematic diagram of the structure of a multi-connected integrated metal separation device in Embodiment 1 of the present invention;

[0031] Fig.10 This is a schematic diagram of the internal structure of a multi-connected integrated metal separation device in Embodiment 1 of the present invention;

[0032] Fig.11 This is a schematic diagram of the structure of a multi-connected integrated metal separation device in Embodiment 2 of the present invention;

[0033] Fig.12 It is a structural schematic diagram of the material receiving device in the present invention;

[0034] Fig.13 It is an internal structural schematic diagram of the material receiving device in the first embodiment of the present invention;

[0035] Fig.14 It is an internal structural schematic diagram of the material receiving device in the second embodiment of the present invention;

[0036] In the figure: 1. Double-tower knife crusher; 11. Left box body; 12. Right box body; 13. Feeding hopper; 14. Tower-shaped blade group; 141. Crushing rotating shaft; 142. Circular crushing blade; Crushing knife pattern; 143. 15. Crushing motor; 16. Clamping device; 161. Adapter; 162. Adapter column; 163. Clamping part; 164. Snap ring; 17. Discharge hopper; 18. Sealing strip; 2. Four-roller grinding machine; 21. Grinding box body; 22. Grinding roller; 23. Grinding motor; 24. Belt; 25. Feeding pipe; 26. Diffusion hopper; 27. Rectangular feeding port; 3. Four-connected arc surface magnetic iron remover; 31. Iron suction box; 32. Ring-shaped electromagnet; 33. Iron chip scraping piece; 34. Iron chip collection box; 35. Conveyor box; 36. Oblique channel; 4. Electric heating conveyor; 5. Dehumidifier; 6. Multi-connected integrated metal separation device; 61. Z-shaped multi-connected channel; 611. Sub-channel; 62. Metal chip collection box; 63. Feeding fan; 64. Filter screen; 7. Material receiving device; 71. Buffer funnel; 72. Buffer bin; 73. Receiving bag; 74. Filter gas cloth cylinder; 75. Filter gas assembly; 751. Filter gas plate; 752. Filter gas support plate. Specific embodiments

[0037] Next, in combination with the accompanying drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0039] Embodiment 1:

[0040] As Figure 1 shown, a glass fiber waste recycling and treatment process includes the following steps:

[0041] Step 1: Pre-clean the glass fiber waste with a length of 50-80 mm, first soak it with solution, and then flush it;

[0042] Step 2: Put the pre-cleaned glass fiber waste into a double-turret knife crusher (1) and grind it into powder, and then further grind it into glass fiber waste powder by a four-roller grinder (2);

[0043] Step 3: feeding the glass fiber waste powder into a quadruple arc magnetic de-ironing machine (3) to remove iron filings;

[0044] Step 4: heating and dehumidifying the glass fiber waste powder by an electric heat conveyor (4) and a dehumidifier (5) to reduce the moisture content to less than 0.5%;

[0045] Step 5: feeding the waste glass fiber powder into a metal separation device (6) to remove metal scraps to form authentic glass fiber powder;

[0046] Step 6: Send the genuine glass fiber powder to the collecting device (7) for filtered gas collection.

[0047] It can safely and effectively process waste glass fiber, efficiently remove iron filings and other metal powders in waste glass fiber, realize integrated production, fast production speed, high production efficiency, can reduce production costs and save energy.

[0048] In actual production, the pre-cleaned waste glass fiber a with a length of 50-80 mm is put into the feed hopper 13, crushed into powder by the tower blade group 14 of the double-tower knife crusher 1, and further ground by the grinding roller 22 of the four-roller grinder 2 to form glass fiber waste powder b; the glass fiber waste powder b is sent to the four-link arc surface magnetic de-ironizer 3 to remove the iron filings c contained therein, the annular electromagnet 32 ​​is composed of four arc surface electromagnets 321, and the iron filings c fall into the iron filing collection box 34; the glass fiber waste powder b is heated and dehumidified by the electric heat conveyor 4 and the dehumidifier 5, so that the moisture content Less than 0.5%, the glass fiber waste powder b is fed into a multi-integrated metal separation device 6 through an angled channel 36; the metal separation device 6 is used to remove metal chips d contained in the glass fiber waste powder b, and the glass fiber waste powder b is blown and selected by a feeding fan 63, and the glass fiber waste powder b with lower density is blown upward to form a genuine glass fiber powder, and the metal chips d with higher density fall downward into a metal chip collection box 62; the genuine glass fiber powder is fed into a collecting device 7, filtered through an air filter component, and the genuine glass fiber powder is collected in a collecting bag 73.

[0049] like Figures 2 to 4As shown, the double-tower blade crusher 1 includes a left box body 11 and a right box body 12, a feed hopper 13 arranged at the top of the left box body 11 and the right box body 12, and a discharge hopper 17 arranged at the bottom of the left box body 11 and the right box body 12; the left box body 11 and the right box body 12 are both provided with a tower-shaped blade group 14 and a crushing motor 15 that drives the tower-shaped blade group 14 to rotate, and the tower-shaped blade group 14 includes a crushing shaft 141, a plurality of circular crushing blades 142 whose centers are arranged on the crushing shaft 141 and whose diameters gradually increase from top to bottom, and crushing knife patterns 143 arranged on the outer circles of the circular crushing blades 142, and the crushing knife patterns 143 on the circular crushing blades 142 gradually become thinner from top to bottom, and the circular crushing blades 142 in the left box body 11 and the circular crushing blades 142 in the right box body 12 are arranged crosswise up and down. The feed hopper 13 is easy to input coarse waste glass fibers. The waste glass fibers are gradually crushed from coarse to fine through a plurality of circular crushing blades 142 with gradually increasing diameters from top to bottom and crushing knife patterns 143 with gradually decreasing diameters from top to bottom. The crushing speed is fast and the crushing efficiency is high. The detachable left box body 11 and right box body 12 are used to facilitate internal cleaning and maintenance.

[0050] The left box 11 and the right box 12 are connected by a fastening device 16, and a sealing strip 18 is provided at the connection between the left box 11 and the right box 12. The fastening device 16 includes an adapter 161 provided on the left box 11, an adapter column 162 connected to the adapter 161, a clamping ring 164 connected to the end of the adapter column 162, and a clamping member 163 provided on the right box 12 and engaged with the clamping ring 164. The clamping ring 164 and the clamping member 163 are engaged and engaged, which is stable and reliable; the sealing strip 18 increases the overall sealing performance to prevent the glass fiber waste powder from leaking out when the twin-tower knife crusher 1 is working.

[0051] like Figure 5 and Figure 6 As shown, the four-roller grinder 2 includes a grinding box 21, two groups of grinding components symmetrically arranged on the grinding box 21, and a feed pipe 25 arranged on the top of the grinding box 21 and between the two groups of grinding components. The grinding components include two grinding rollers 22 arranged vertically in the grinding box 21, and a grinding motor 23 connected to the ends of the two grinding rollers 22 through a belt 24 on the grinding box 21. The grinding effect is good, so that the powder of the ground glass fiber waste is more uniform, which is convenient for subsequent treatment.

[0052] A rectangular feed port 27 is provided on the top of the grinding box 21 between the two groups of grinding components, and a diffusion hopper 26 connected to the rectangular feed port 27 is provided on the feed pipe 25. The grinding rollers 22 on the left and right sides squeeze each other to achieve the grinding effect, and the diffusion hopper 26 is used to spread the glass fiber waste powder at the rectangular feed port 27 when it enters, so as to avoid the accumulation of glass fiber waste powder and improve the grinding efficiency.

[0053] like Figure 7 and Figure 8 As shown, the quadruple arc-surface magnetic iron removal machine 3 includes a suction box 31, an annular electromagnet 32 ​​arranged at the top feed port of the suction box 31, an iron scraping sheet 33 arranged on the suction box 31 and in contact with the annular electromagnet 32, and an iron scrap collecting box 34 arranged at the bottom of the suction box 31, wherein the annular electromagnet 32 ​​is composed of four arc-surface electromagnets 321; a conveying box 35 connected to the annular electromagnet 32 ​​is provided on the side of the suction box 31, and the electric heat conveyor 4 and the dehumidifier 5 are arranged on the conveying box 35; an angled channel 36 connected to the bottom of the multi-integrated metal separation device 6 is provided at the discharge port of the conveying box 35, and the angled channel 36 is inclined downward and outward at an angle of 5° to 45°.

[0054] The annular electromagnet 32 ​​rotates to continuously magnetically absorb iron filings in the glass fiber waste powder. The annular electromagnet 32 ​​is composed of four arc-surface electromagnets 321. The power on and off of the four arc-surface electromagnets 321 can be controlled individually. When one of the arc-surface electromagnets 321 reaches the inner side of the suction box 31, it is controlled to be powered off to eliminate the magnetic force, thereby releasing the iron filings. The scraping iron scraper 33 can further scrape the iron filings, so that the iron filings fall into the iron filing collection box 34, and the annular electromagnet 32 ​​continues to rotate. After scraping off the iron chips, the arc-surface electromagnet 321 continues to rotate, and after being energized, it generates magnetic force to continue to adsorb the iron chips, avoiding the waste of electricity in the material-free area when the machine is working, thereby saving electricity for magnetically attracting iron chips, and being able to remove iron chips uninterruptedly with high iron chip removal efficiency; the angled channel 36 is inclined downward and outward at an angle of 5°-45°, and a slope length of 1.5-2 meters is set, which buffers the conveying force and the material falling force, and can improve the separation efficiency and effect of the subsequent multi-integrated metal separation device 6 for metal chips.

[0055] like Fig. 9 As shown, the multi-integrated metal separation device 6 includes a Z-shaped multi-channel 61, a metal chip collection box 62 arranged at the bottom of the Z-shaped multi-channel 61, and a plurality of feeding fans 63 arranged on the Z-shaped multi-channel 61. The Z-shaped multi-channel 61 is composed of mutually intersecting and upwardly inclined sub-channels 611. The feeding fan 63 is arranged at the tail of the sub-channel 611. The tail of the sub-channel 611 is provided with a filter 64 connected to the feeding fan 63, and adjacent sub-channels 611 intersect to form a 90° angle.

[0056] like Fig.10As shown, the glass fiber waste powder is blown and selected by the feeding fan 63. The feeding fans 63 on the left and right sides simultaneously perform bidirectional and multi-layer air selection. According to the direction indicated by the arrow, the glass fiber waste powder with lower density is blown upward for feeding, and the metal chips with higher density fall downward into the metal chip collection box 62, which can effectively remove the metal chips in the glass fiber waste powder to form authentic glass fiber powder. The air selection and isolation to remove other metal chips is efficient, fast, and has a good separation effect. A filter screen 64 is provided at the tail of the branch channel 611 to prevent dust from leaking out and polluting the air.

[0057] The branch channel 611 adopts a hollow rectangular parallelepiped structure, which is convenient to manufacture.

[0058] like Fig.12 and Fig.13 As shown, the collecting device 7 includes a buffer hopper 71 at the top, a buffer bin 72 at the middle, and a collecting bag 73 at the bottom. The buffer hopper 71 is connected to the top of the multi-integrated metal separation device 6. The buffer bin 72 is provided with a filter cloth tube 74 connected to the buffer hopper 71 and the collecting bag 73. The filter cloth tube 74 is connected to the buffer hopper 71 through a first connecting pipe 76. The filter cloth tube 74 is connected to the collecting bag 73 through a second connecting pipe 77. The buffer hopper 71 and the buffer bin 72 are both provided with a filter assembly 75. The filter assembly 75 is provided with several layers of filter plates 751. After the genuine glass fiber powder enters the collecting device 7, the buffer hopper 71, the buffer bin 72, and the filter cloth tube 74 in the buffer bin 72 all play a role of buffering, and the filter assembly 75 plays a role of exhausting, which can ensure that the collecting bag 73 can quickly collect the genuine glass fiber powder.

[0059] Embodiment 2:

[0060] The process structure of this embodiment is basically the same as that of the first embodiment, except that:

[0061] like Fig.11 As shown, reference Fig. 9 and Fig.10 The branch channel 611 adopts a hollow cylindrical structure, and the filter screen 64 is arranged inside and not marked. At the same time, chamfers are arranged at the corners to avoid the accumulation of glass fiber powder, ensure the smoothness of the entire Z-shaped multi-channel 61, and improve the separation efficiency of metal chips.

[0062] like Fig.14 As shown, reference Fig.12 and Fig.13 The air filter support plate 752 is provided at the air inlet of the air filter assembly 75. Most of the genuine glass fiber powder can be directly isolated in the buffer funnel 71 and the buffer bin 72, reducing the entry of genuine glass fiber powder into the air filter assembly 75 and avoiding the blockage of the air filter assembly 75 to affect the air filtering effect.

[0063] The above-mentioned implementation modes are only preferred implementation modes of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present application shall fall within the scope of protection required by the present application.

Claims

1. A glass fiber waste recycling process, characterized in that: The following steps are involved: Step 1: Pre-clean the glass fiber waste with a length of 50-80 mm, first soak it with solution, and then flush it; Step 2: Put the pre-cleaned glass fiber waste into a double-turret knife crusher (1) and grind it into powder, and then further grind it into glass fiber waste powder by a four-roller grinder (2); Step 3: feeding the glass fiber waste powder into a quadruple arc magnetic de-ironing machine (3) to remove iron filings; Step 4: heating and dehumidifying the glass fiber waste powder by an electric heat conveyor (4) and a dehumidifier (5) to reduce the moisture content to less than 0.5%; Step 5: feeding the waste glass fiber powder into a metal separation device (6) to remove metal scraps to form authentic glass fiber powder; Step 6: Send the genuine glass fiber powder to the collecting device (7) for filtered gas collection.

2. The glass fiber waste recycling process according to claim 1, characterized in that: The double-tower blade pulverizer (1) comprises a left box (11) and a right box (12), a feed hopper (13) arranged at the top of the left box (11) and the right box (12), and a discharge hopper (17) arranged at the bottom of the left box (11) and the right box (12); a tower-shaped blade group (14) and a pulverizing motor (15) for driving the tower-shaped blade group (14) to rotate are arranged in the left box (11) and the right box (12); the tower-shaped blade group (14) comprises a pulverizing rotor A shaft (141), a plurality of circular crushing blades (142) whose centers are arranged on the crushing rotating shaft (141) and whose diameters gradually increase from top to bottom, crushing knife lines (143) arranged on the outer circles of the circular crushing blades (142), the crushing knife lines (143) on the circular crushing blades (142) gradually becoming thinner from top to bottom, and the circular crushing blades (142) in the left housing (11) and the circular crushing blades (142) in the right housing (12) are arranged crosswise up and down.

3. A glass fiber waste recycling process according to claim 2, characterized in that: The left box body (11) and the right box body (12) are connected via a fastening device (16); a sealing strip (18) is provided at the connection between the left box body (11) and the right box body (12); the fastening device (16) comprises a transition piece (161) provided on the left box body (11), a transition column (162) connected to the transition piece (161), a snap ring (164) connected to the end of the transition column (162), and a snap-fit ​​piece (163) provided on the right box body (12) and snap-fitted with the snap ring (164).

4. The glass fiber waste recycling process according to claim 1, characterized in that: The four-roller grinding machine (2) comprises a grinding box (21), two groups of grinding components symmetrically arranged on the grinding box (21), and a feed pipe (25) arranged at the top of the grinding box (21) and between the two groups of grinding components. The grinding components comprise two grinding rollers (22) arranged vertically in the grinding box (21), and a grinding motor (23) arranged on the grinding box (21) and connected to the ends of the two grinding rollers (22) via a belt (24).

5. The glass fiber waste recycling process according to claim 4, characterized in that: A rectangular feed port (27) is provided at the top of the grinding box (21) between the two groups of grinding components, and a diffusion hopper (26) connected to the rectangular feed port (27) is provided on the feed pipe (25).

6. The glass fiber waste recycling process according to claim 1, characterized in that: The quadruple arc-surface magnetic iron removal machine (3) comprises a suction box (31), an annular electromagnet (32) arranged at a feeding port at the top of the suction box (31), an iron scraping sheet (33) arranged on the suction box (31) and in contact with the annular electromagnet (32), and an iron scrap collecting box (34) arranged at the bottom of the suction box (31), wherein the annular electromagnet (32) is composed of four arc-surface electromagnets (321); a conveying box (35) connected to the annular electromagnet (32) is arranged on the side of the suction box (31), the electric heat conveyor (4) and the dehumidifier (5) are arranged on the conveying box (35), and an oblique channel (36) connected to the bottom of the multi-integrated metal separation device (6) is arranged at the discharge port of the conveying box (35), and the oblique channel (36) is inclined downward and outward at an angle of 5°-45°.

7. The glass fiber waste recycling process according to claim 1, characterized in that: The multi-integrated metal separation device (6) comprises a Z-shaped multi-channel (61), a metal chip collection box (62) arranged at the bottom of the Z-shaped multi-channel (61), and a plurality of feeding fans (63) arranged on the Z-shaped multi-channel (61); the Z-shaped multi-channel (61) is composed of mutually intersecting and upwardly inclined sub-channels (611); the feeding fans (63) are arranged at the tail of the sub-channel (611); a filter screen (64) connected to the feeding fans (63) is arranged at the tail of the sub-channel (611); and adjacent sub-channels (611) intersect to form a 90° angle.

8. The glass fiber waste recycling process according to claim 7, characterized in that: The branch channel (611) adopts a hollow rectangular parallelepiped structure or a hollow cylindrical structure.

9. The glass fiber waste recycling process according to claim 1, characterized in that: The material receiving device (7) comprises a buffer hopper (71) at the top, a buffer bin (72) at the middle, and a material receiving bag (73) at the bottom. The buffer hopper (71) is connected to the top of the multi-connected integrated metal separation device (6). The buffer bin (72) is provided with an air filter cloth drum (74) connected to the buffer hopper (71) and the material receiving bag (73). The air filter cloth drum (74) is connected to the buffer hopper (71) via a first connecting pipe (76). The air filter cloth drum (74) is connected to the material receiving bag (73) via a second connecting pipe (77). The buffer hopper (71) and the buffer bin (72) are both provided with an air filter assembly (75). The air filter assembly (75) is provided with a plurality of layers of air filter plates (751).

10. A glass fiber waste recycling process according to claim 9, characterized in that: An air filter support plate (752) is provided at the air inlet of the air filter assembly (75).

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