Regenerated raw material recovery device for ecological paper manufacturing

Abstract

The invention discloses a regenerated raw material recovery device for ecological paper manufacturing, which comprises a shearing and crushing unit, a rolling screening unit, a magnetic separation and winnowing integrated unit and an integrated box body, a shearing crushing unit, a rolling screening unit and a magnetic separation and winnowing integration unit are sequentially arranged in the length direction of the integrated box body from top to bottom, and the shearing crushing unit, the rolling screening unit and the magnetic separation and winnowing integration unit are integrated in the integrated box body. Compared with traditional manual sorting, the treatment efficiency and the purification effect of waste paper raw materials are remarkably improved, manual transfer and conveying are not needed among the units, manual intervention is reduced, the space utilization rate of the equipment is greatly optimized, multiple impurity discharging ports and a sealed discharging structure are arranged on the side face of the integrated box, impurities are separated layer by layer, and the waste paper raw materials are separated more effectively. And the high efficiency of impurity separation and the sealing performance of equipment operation are ensured, and secondary pollution is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of recycled paper manufacturing technology, and more specifically to a recycled raw material recycling device for the manufacture of eco-friendly paper. Background Technology

[0002] With social development, the consumption of paper products has grown rapidly. Recycled paper, an environmentally friendly paper made from waste paper, has become increasingly important. The reuse of waste paper not only reduces urban solid waste pollution, but also reduces deforestation caused by papermaking, thus protecting the ecological environment and saving raw material costs. Therefore, recycled paper is an inevitable direction for the development of the papermaking industry.

[0003] Eco-friendly paper manufacturing emphasizes resource recycling and environmentally friendly production processes, with its core raw materials derived from various types of waste paper. However, recycled waste paper raw materials have complex compositions and often contain impurities such as plastic film, tape, and staples. If these impurities and pollutants are not effectively removed, they will directly affect the subsequent pulping quality, paper strength, and the normal operation of production equipment.

[0004] Currently, most recycled paper sorting requires manual sorting, which is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0005] To address the technical deficiencies in the background technology, this invention proposes a recycled raw material recovery device for eco-paper manufacturing, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows: A recycled raw material recycling device for eco-paper manufacturing includes a shearing and crushing unit, a rolling screening unit, a magnetic separation and air separation integrated unit, and an integrated housing. The shearing and crushing unit, the rolling screening unit, and the magnetic separation and air separation integrated unit are arranged sequentially from top to bottom along the length direction of the integrated housing. One end of the integrated housing is provided with a feed inlet, and the other end of the integrated housing is provided with a discharge outlet. The outer surface of the integrated housing is provided with several impurity discharge outlets. The shearing and crushing unit is located inside the integrated housing near the bottom of the feed inlet. The rolling screening unit is located directly below the shearing and crushing unit, and the rolling screening unit is inclined as a whole. The magnetic separation and air separation integrated unit is located downstream of the rolling screening unit and is used to receive the screened material. The impurity discharge port includes a first impurity outlet located at the lower end of the rolling screening unit, and a second impurity outlet located on the side of the magnetic separation and air separation integrated unit.

[0006] As an improvement to the above solution, a first chamber is provided inside the box corresponding to the position of the shearing and crushing unit, and the shearing and crushing unit includes: At least one pair of parallel crushing rollers are provided, and the crushing rollers are horizontally mounted on a first bearing seat on the inner wall of the first chamber. Several sets of moving blades are fixedly installed on two adjacent crushing rollers in an alternating manner along the axial direction, so as to form a shearing engagement when the rollers rotate in opposite directions; The drive mechanism includes a first drive motor and a gearbox. The drive mechanism is installed on the outside of the integrated housing. The output shaft of the first drive motor is connected to the end of one of the crushing roller shafts through a coupling, and synchronously drives the other crushing roller shaft to rotate in the opposite direction through gears in the gearbox.

[0007] As an improvement to the above solution, a second chamber is provided inside the box corresponding to the position of the rolling screening unit, and the rolling screening unit includes: A screen shaft is obliquely mounted on a second bearing seat on the inner wall of the first chamber, and a second drive motor is connected to one end of the screen shaft; A rotating screen, wherein the axis of the rotating screen is aligned with the screen shaft, and the screen shaft is connected to the inner wall of the rotating screen by a support frame, and the entire rotating screening unit is in an inclined state; The guide plate is fixedly installed below the rotating screen and is used to receive the material passing through the rotating screen and guide it downstream.

[0008] As an improvement to the above solution, the inner wall of the rotating screen is provided with a loosening structure to prevent material accumulation. The loosening structure includes several vertically arranged loosening rods, one end of which is fixed to the inner surface of the rotating screen, and the other end extends toward the screen axis.

[0009] As an improvement to the above solution, the integrated magnetic and wind separation unit includes: The stepped material channel includes a first-level chute, a vertical section, and a second-level chute connected from top to bottom; The inlet end of the first-stage chute is fixedly connected to the outlet position of the guide plate, and its chute body is inclined downward, with the end opening forming the top inlet of the vertical section; The vertical section is a vertical channel with a height H of 300mm to 500mm; The inlet end of the second-stage chute is located below the bottom outlet of the vertical section, its chute body is inclined downwards, and its outlet end leads to the discharge port of the integrated box.

[0010] As an improvement to the above solution, the integrated magnetic and wind separation unit further includes: The permanent magnet separator has a side door on the side wall of the integrated housing corresponding to the vertical section. The side door contains a third chamber for installing the permanent magnet separator. The third chamber is connected to the vertical section. The permanent magnet separator is detachably installed on the side wall of the third chamber, and its magnetic working surface faces the entire falling space of the vertical section, for adsorbing ferromagnetic impurities in the material.

[0011] As an improvement to the above solution, the magnetic separation and air separation integrated unit further includes a pulse air separation component; The pulse air separation assembly includes a high-pressure air tank, a pulse solenoid valve, and at least one row of air separation nozzles. The output end of the high-pressure air tank is connected to the pulse solenoid valve and the air separation nozzles in sequence via an air pipe. The air-separating nozzles are arranged horizontally and installed on the side wall of the integrated housing. Their nozzles point towards the space above the second-stage chute. The spray direction of the air-separating nozzles forms an obtuse angle of 100° to 140° with the flow direction of the material in the second-stage chute.

[0012] As an improvement to the above solution, the impurity outlet is located on the side wall of the integrated housing, and its position is directly opposite to the direction of the air classifier nozzle, for collecting the blown-out light impurities; a dust collection bag is detachably connected to the outside of the impurity outlet.

[0013] As an improvement to the above solution, a sealed discharge valve is installed at the first impurity outlet, the second impurity outlet, and the main discharge port; the sealed discharge valve is one of a flap valve, a double gate valve, and a rotary valve, used to maintain the basic sealing state of the integrated box during discharge.

[0014] The beneficial effects of this invention are as follows: This technical solution integrates the shearing and crushing unit, the rolling screening unit, and the magnetic and air separation unit into the integrated housing. Compared with traditional manual sorting, it significantly improves the processing efficiency and purification effect of waste paper raw materials. There is no need for manual transfer and transportation between the units, reducing human intervention and greatly optimizing the space utilization of the equipment. By setting multiple impurity discharge ports on the side of the integrated housing and a sealed unloading structure, impurities can be separated layer by layer, ensuring the high efficiency of impurity separation and the airtightness of equipment operation, effectively preventing secondary pollution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the device of the present invention.

[0016] Figure 2 This is a schematic diagram of the shearing and crushing unit structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the integrated magnetic and air separation unit structure of the present invention. Figure 1 .

[0018] Figure 4 This is a schematic diagram of the integrated magnetic and air separation unit structure of the present invention. Figure 2 .

[0019] The components include: an integrated housing 1, a feed inlet 11, a discharge outlet 12, a first impurity outlet 13, a second impurity outlet 14, a first chamber 15, a second chamber 16, a side door 17, a third chamber 18, a shearing and crushing unit 2, a crushing roller shaft 21, a moving blade 22, a first drive motor 23, a gearbox 24, a rolling screening unit 3, a screen shaft 31, a rolling screen 32, a guide plate 33, a loosening rod 34, a support frame 35, a second bearing seat 36, a stepped material channel 4, a first-stage chute 41, a vertical section 42, a second-stage chute 43, a slope 44, a magnetic and air separation integrated unit 5, a permanent magnet iron remover 51, a pulse air separation component 52, a high-pressure air tank 53, an air pipe 54, a pulse solenoid valve 55, an air separation nozzle 56, and a sealed discharge valve 6. Detailed Implementation

[0020] The embodiments of the present invention will be described below with reference to the accompanying drawings and related examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to the relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0021] A recycled raw material recycling device for eco-paper manufacturing includes a shearing and crushing unit 2, a rolling screening unit 3, a magnetic separation and air separation integrated unit 5, and an integrated box 1. The shearing and crushing unit 2, the rolling screening unit 3, and the magnetic separation and air separation integrated unit 5 are arranged sequentially from top to bottom along the length direction of the integrated box 1. In this technical solution, the integrated box 1 constitutes a closed working environment, eliminating the need for manual material transfer between various stages and effectively preventing dust from escaping. The material enters from the feed inlet 11 at the top of the integrated box 1 and, under gravity drive and mechanical guidance, passes through the shearing and crushing unit 2, the strip screening unit, and the magnetic and air separation integrated unit 5 in sequence, forming qualified shredded paper that is discharged from the discharge outlet 12 at the bottom of the integrated box 1. Various impurities are discharged from the first impurity outlet 13 and the second impurity outlet 14, respectively.

[0022] Specifically, in the above scheme, one end of the integrated box 1 is provided with a feed inlet 11 for dumping recycled raw materials, and the other end of the integrated box 1 is provided with a discharge outlet 12 for discharging the crushed and screened raw materials through the discharge outlet 12. The outer surface of the integrated box 1 is provided with several impurity discharge outlets 12, through which unqualified crushed materials and impurities are discharged. The shearing and crushing unit 2 is located inside the integrated box 1, near the bottom of the feed inlet 11. The rolling screening unit 3 is located directly below the shearing and crushing unit 2, and the rolling screening unit 3 is inclined as a whole. The magnetic separation and air separation integrated unit 5 is located downstream of the rolling screening unit 3 for receiving the screened materials. In the technical solution of the shearing and crushing unit 2, a first chamber 15 is provided in the box body corresponding to the position of the shearing and crushing unit 2, and the shearing and crushing unit 2 includes: At least one pair of parallel crushing roller shafts 21 are horizontally mounted on a first bearing seat on the inner wall of the first chamber 15; Several sets of moving blades 22 are respectively fixedly installed on two adjacent crushing roller shafts 21 in an alternating manner along the axial direction, so as to form a shearing engagement when the roller shafts rotate in opposite directions; The drive mechanism includes a first drive motor 23 and a gearbox 24. The drive mechanism is mounted on the outside of the integrated housing 1. The output shaft of the first drive motor 23 is connected to the end of one of the crushing roller shafts 21 via a coupling, and synchronously drives the other crushing roller shaft 21 to rotate in the opposite direction via gears inside the gearbox 24. It should be noted that, in actual operation, the shearing and crushing unit 2 drives the crushing roller shaft 21 to rotate in opposite directions via the first drive motor 23. The staggered design of the moving blades 22 enables the waste paper raw material to be quickly sheared and crushed after entering the first chamber 15, which not only improves the crushing efficiency but also effectively avoids the occurrence of material jamming. At the same time, the moving blades 22 are arranged at equal intervals and staggered, and their shearing force is evenly distributed, which can ensure that the waste paper raw material will not be over-crushed or under-crushed due to excessive local stress during the crushing process.

[0023] It should be noted that several sets of moving blades 22 are welded alternately along the axial direction in a spiral pattern on the crushing roller shaft 21. The moving blades 22 are preferably made of high-chromium alloy steel, which has good wear resistance. The adjacent sets of moving blades 22 are arranged alternately in space. When the crushing roller shaft 21 rotates towards each other at a speed of about 25-35 rpm under the drive of the drive device, the alternately arranged moving blades 22 form a strong shearing action, tearing and crushing the input waste paper, cardboard and other raw materials into uniformly sized flakes, rather than crushing them into powder. This is beneficial for subsequent sorting and reduces fiber damage.

[0024] In the technical solution of the rolling screening unit 3, a second chamber 16 is provided inside the box corresponding to the position of the rolling screening unit 3, and the rolling screening unit 3 includes: A screen shaft 31 is obliquely mounted on a second bearing seat 36 on the inner wall of the first chamber 15, and a second drive motor is connected to one end of the screen shaft 31. A rotating screen 32 is provided, the axis of which is aligned with the screen shaft 31. The screen shaft 31 is connected to the inner wall of the rotating screen 32 by a support frame 35. The entire rotating screening unit 3 is in an inclined state. The guide plate 33 is fixedly installed below the rotating screen 32 to receive the material passing through the rotating screen 32 and guide it downstream.

[0025] It should be noted that during use, the sheared raw material enters the rolling screening unit 3. The rolling screening unit 3 drives the screen shaft 31 to rotate through the second drive motor. The screen shaft 31 is connected to the rolling screen 32 through the support frame 35, thereby enabling the rolling screen 32 to achieve dynamic screening of materials. The inclined design of the rolling screen 32 allows the materials to slide down naturally during the rolling process. At the same time, the size of the screen holes filters out the paper scraps that meet the requirements, while larger impurities slide down the screen surface to the first impurity outlet 13 at the lower end and are discharged. The rotation speed of the screen shaft 31 can be adjusted according to the characteristics of the material to ensure that the screening efficiency and effect reach the best balance.

[0026] Furthermore, in the above scheme, the inner wall of the rotating screen 32 is provided with a loosening structure for preventing material accumulation. The loosening structure includes several vertically arranged loosening rods 34. One end of the loosening rod 34 is fixed to the inner surface of the rotating screen 32, and the other end extends toward the screen shaft 31.

[0027] It should be noted that, in the preferred embodiment, in order to optimize the screening process, the inner wall of the rotating screen 32 is provided with a loosening structure. The loosening structure consists of several vertically arranged loosening rods 34. One end of each loosening rod 34 is fixed to the inner surface of the rotating screen 32, and the other end extends toward the screen shaft 31. Its function is to prevent the material from clogging the screen holes due to accumulation or adhesion during the screening process. When the rotating screen 32 rotates, the loosening rods 34 move synchronously with the screen to turn over and loosen the material, thereby improving screening efficiency and reducing the need for manual cleaning and maintenance.

[0028] Furthermore, in the above scheme, the guide plate 33 is located below the rotating screen 32 and is used to receive qualified materials passing through the screen and guide them smoothly to the downstream process. The surface of the guide plate 33 has good wear resistance and smoothness, which can effectively reduce the friction loss of materials during the conveying process. At the same time, the inclined design of the guide plate 33 ensures that the materials can enter the next processing unit at an appropriate speed.

[0029] In the technical solution of the magnetic separation and air separation integrated unit 5, the magnetic separation and air separation integrated unit 5 includes: The stepped material channel 4 includes a first-level chute 41, a vertical section 42, and a second-level chute 43 connected from top to bottom; The inlet end of the first-stage chute 41 is fixedly connected to the outlet position of the guide plate 33, and its chute body is inclined downward, with the end opening forming the top inlet of the vertical section 42. The vertical segment 42 is a vertical channel with a height H of 300mm to 500mm; The inlet end of the second-stage chute 43 is located below the bottom outlet of the vertical section 42, its chute body is inclined downward, and its outlet end leads to the discharge port 12 of the integrated box 1.

[0030] It should be noted that the design of the stepped material channel 4 enables the material to be separated and precisely processed step by step when passing through the magnetic separation and air separation integrated unit 5. The inclined design of the first-stage chute 41 ensures that the material can slide smoothly under the action of gravity, while avoiding the decrease in sorting effect due to excessive speed. After passing through the vertical section 42, the material enters the second-stage chute 43. The height of the vertical section 42 is set to 300mm to 500mm to ensure that the material is fully dispersed during free fall. The second-stage chute 43 further receives the material falling from the vertical section 42 and guides the material to the discharge port 12 through its downward inclined design, completing the entire sorting process.

[0031] Furthermore, in the above scheme, the magnetic separation and air separation integrated unit 5 also includes: The permanent magnet separator 51 has a side door 17 on the side wall of the integrated housing 1 corresponding to the position of the vertical section 42. The side door 17 has a third chamber 18 for installing the permanent magnet separator 51. The third chamber 18 is connected to the vertical section 42. The permanent magnet separator 51 is detachably installed on the side wall of the third chamber 18. The detachment structure is a pull-out detachment structure, and its magnetic working surface faces the entire falling space of the vertical section 42 to adsorb ferromagnetic impurities in the material.

[0032] In practical applications, the permanent magnet separator 51 removes ferromagnetic impurities in the stepped material channel 4. The permanent magnet separator 51 is detachably installed in the third chamber 18 for easy regular cleaning and maintenance. Its magnetic working surface faces the entire falling space of the vertical section 42, ensuring that the material can be fully scanned and adsorbed when passing through the vertical section 42. Preferably, the magnetic field strength of the permanent magnet separator 51 can be adjusted according to actual needs to adapt to the differences in the content of ferromagnetic impurities in different types of waste paper raw materials.

[0033] In the technical solution of the magnetic separation and air separation integrated unit 5, the magnetic separation and air separation integrated unit 5 further includes a pulse air separation component 52; The pulse air separation component 52 includes a high-pressure air tank 53, a pulse solenoid valve 55, and at least one row of air separation nozzles 56. The output end of the high-pressure air tank 53 is connected to the pulse solenoid valve 55 and the air separation nozzles 56 in sequence through an air pipe 54. The air-separating nozzles 56 are arranged horizontally and installed on the side wall of the integrated housing 1. Their nozzles point towards the space above the second-stage chute 43. The spraying direction of the air-separating nozzles 56 forms an obtuse angle of 100° to 140° with the flow direction of the material in the second-stage chute 43.

[0034] The pulse air separation component 52 enhances the separation effect of the device on light impurities. The high-pressure air tank 53 is connected to the pulse solenoid valve 55 and the air separation nozzle 56 through the air pipe 54 to form a stable high-pressure air supply system. The air separation nozzle 56 is arranged horizontally and installed on the side wall of the integrated housing 1. Its spray direction forms an obtuse angle of 100° to 140° with the flow direction of the material in the second-stage chute 43. This design allows the airflow to effectively sweep away light impurities on the surface of the material, such as plastic film and foam particles, without interfering with the flow of the main material.

[0035] Furthermore, in the above scheme, the impurity outlet 12 is opened on the side wall of the integrated housing 1, and its position is directly opposite to the direction of the air classifier nozzle 56, for collecting the blown light impurities; a dust collection bag is detachably connected to the outside of the impurity outlet 12.

[0036] Furthermore, the side of the second chute connected to the second impurity outlet 14 is provided with an inclined slope 44. Light impurities enter the second impurity outlet 14 along the slope 44 under the action of the airflow from the air classifier nozzle 56 and are discharged outward. Furthermore, in the above scheme, the impurity outlet 12 includes a first impurity outlet 13 located at the lower end of the rolling screening unit 3, and a second impurity outlet 14 located on the side of the magnetic separation and air separation integrated unit 5.

[0037] Furthermore, a sealed discharge valve 6 is installed at the first impurity outlet 13, the second impurity outlet 14, and the main discharge port 12; the sealed discharge valve 6 is one of a flap valve, a double gate valve, and a rotary valve, used to maintain the basic sealing state of the integrated box 1 during discharge.

[0038] The position of the second impurity outlet 14 corresponds to the direction of the air classifier nozzle 56, ensuring that the blown-out light impurities can be discharged quickly and avoid secondary mixing. The impurity outlet 12 is detachably connected to a dust collection bag, which not only facilitates the collection and treatment of separated impurities, but also effectively prevents dust from escaping and keeps the working environment clean. The sealed discharge valve 6 further improves the sealing performance of the equipment. Whether it is the first impurity outlet 13, the second impurity outlet 14, or the main discharge outlet 12, they can all maintain the basic sealing state of the integrated box 1 during the discharge process, thereby effectively preventing secondary pollution.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A recycled raw material recovery device for ecological paper production, characterized by, The device comprises a shearing crushing unit (2), a rolling screening unit (3), a magnetic separation and air separation integrated unit (5) and an integrated box (1), and the shearing crushing unit (2), the rolling screening unit (3) and the magnetic separation and air separation integrated unit (5) are sequentially arranged from top to bottom along the length direction of the integrated box (1); One end of the integrated box (1) is provided with a feeding port (11), the other end of the integrated box (1) is provided with a discharging port (12), the outer surface of the integrated box (1) is provided with a plurality of impurity discharging ports (12), the shearing crushing unit (2) is arranged inside the integrated box (1) and is located below the top feeding port (11), the rolling screening unit (3) is arranged directly below the shearing crushing unit (2), and the rolling screening unit (3) is arranged in an inclined state, the magnetic separation and air separation integrated unit (5) is arranged downstream of the rolling screening unit (3) and is used for receiving the screened material; The impurity discharging port (12) comprises a first impurity outlet (13) arranged at a position corresponding to the lower end of the rolling screening unit (3), and a second impurity outlet (14) arranged on the side of the magnetic separation and air separation integrated unit (5).

2. A recycled raw material recovery device for ecological paper production according to claim 1, characterized in that, The box is provided with a first chamber (15) corresponding to the position of the shearing crushing unit (2), and the shearing crushing unit (2) comprises: At least one pair of parallel arranged crushing roller shafts (21) are horizontally installed on the first bearing seat of the inner wall of the first chamber (15); A plurality of groups of moving blades (22) are fixedly installed on the adjacent two crushing roller shafts (21) in an axial staggered manner, so as to form a shearing cooperation when the roller shafts rotate towards each other; A driving mechanism comprising a first driving motor (23) and a gear box (24) is installed on the outside of the integrated box (1), the output shaft of the first driving motor (23) is connected with the end of one of the crushing roller shafts (21) through a shaft coupling, and the other crushing roller shaft (21) is synchronously driven to rotate in the opposite direction through the internal gear of the gear box (24).

3. A recycled raw material recovery device for ecological paper manufacturing according to claim 1, characterized in that, The box is provided with a second chamber (16) corresponding to the position of the rolling screening unit (3), and the rolling screening unit (3) comprises: A screen shaft (31) is obliquely installed on the second bearing seat (36) of the inner wall of the first chamber (15), and one end of the screen shaft (31) is connected with a second driving motor; A rolling screen (32) has its axis aligned with the screen shaft (31), and the screen shaft (31) and the inner wall of the rolling screen (32) are connected with a support frame (35), and the whole rolling screening unit (3) is in an inclined state; A guide plate (33) is fixedly installed below the rolling screen (32) and is used for receiving the material passing through the rolling screen (32) and guiding it downstream.

4. The recycled raw material recovery apparatus for eco-paper manufacturing according to claim 1, characterized by, The inner wall of the rolling screen (32) is provided with a loosening structure for preventing material accumulation, which includes a plurality of vertically arranged loosening rods (34), one end of which is fixed to the inner surface of the rolling screen (32), and the other end extends towards the screen shaft (31).

5. The recycled raw material recovery device for ecological paper manufacturing according to claim 3, characterized in that, The magnetic and pneumatic integrated unit (5) comprises: The stepped material channel (4) comprises a first-stage chute (41), a vertical section (42) and a second-stage chute (43) connected from top to bottom; The inlet end of the first-stage chute (41) is fixedly connected to the outlet position of the flow guide plate (33), the chute body is downwardly inclined, and the outlet end forms the top inlet of the vertical section (42); The vertical section (42) is a vertical channel, and the height H is 300-500 mm; The inlet end of the second-stage chute (43) is located below the bottom outlet of the vertical section (42), the chute body is downwardly inclined, and the outlet end leads to the discharge port (12) of the integrated box (1).

6. A recycled raw material recovery device for ecological paper production according to claim 5, characterized in that, The magnetic and pneumatic integrated unit (5) further comprises a permanent magnet iron remover (51), a side door (17) is formed in the sidewall of the integrated box (1) corresponding to the position of the vertical section (42), a third chamber (18) for mounting the permanent magnet iron remover (51) is arranged in the side door (17), the third chamber (18) is in communication with the vertical section (42), the permanent magnet iron remover (51) is detachably mounted on the sidewall of the third chamber (18), and the magnetic working surface thereof faces the entire falling space of the vertical section (42) for adsorbing ferromagnetic impurities in the material.

7. A recycled raw material recovery device for ecological paper production according to claim 6, characterized in that, The magnetic and pneumatic integrated unit (5) further comprises a pulse pneumatic separation assembly (52); The pulse pneumatic separation assembly (52) comprises a high-pressure gas tank 53, a pulse electromagnetic valve (55) and at least one row of pneumatic separation nozzles (56), the output end of the high-pressure gas tank 53 is connected to the pulse electromagnetic valve (55) and the pneumatic separation nozzle (56) in sequence through an air pipe (54) The pneumatic separation nozzles (56) are arranged transversely and mounted on the sidewall of the integrated box (1), the nozzle outlets thereof point to the space above the second-stage chute (43), and the jet direction of the pneumatic separation nozzles (56) forms an obtuse angle of 100-140° with the flow direction of the material in the second-stage chute (43).

8. A recycled raw material recovery device for eco-paper manufacturing according to claim 1, characterized in that, The impurity discharge port (12) is formed in the sidewall of the integrated box (1) and faces the pointing direction of the pneumatic separation nozzles (56) for collecting the blown light impurities; a dust collection bag is detachably connected to the outside of the impurity discharge port (12).

9. A recycled raw material recovery device for eco-paper manufacturing according to claim 1, characterized in that, The first impurity outlet (13), the second impurity outlet (14) and the main discharge port (12) are each provided with a sealing type discharge valve (6); the sealing type discharge valve (6) is one of a flap valve, a double gate valve and a rotary valve for maintaining the basic sealing state of the integrated box (1) during discharge.

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