Intelligent production line for processing and utilizing renewable resources

Abstract

The application relates to an intelligent production line for processing and utilizing renewable resources, which comprises a chopping module, a screening module, a beating pool, a paperboard machine and a paper baking machine. The chopping module chops raw materials for recycled paper to obtain paper scraps, the screening module screens the paper scraps to remove impurities and obtain refined paper materials, the refined paper materials are stirred and beaten in the beating pool to obtain raw paper pulp, the raw paper pulp is processed in the paperboard machine to obtain wet paperboard, and the wet paperboard is baked in the paper baking machine to obtain finished paper. The screening module is an intelligent grading and impurity removing screening device, at least three of the intelligent grading and impurity removing screening devices are used in combination, the paper scraps are screened and impurities are removed at least three times to obtain refined paper materials which are distributed according to types. The application can recycle and utilize corrugated paper, cultural and printing paper or kraft paper, and can manufacture recycled paper, and the application is energy-saving, environment-friendly, intelligent, labor-saving and cost-reducing. The intelligent grading and impurity removing screening device has good sorting and impurity removing effects.

Description

TECHNICAL FIELD

[0001] The present application relates to a renewable resource processing and utilization intelligent production line, belonging to the technical field of renewable resource processing. BACKGROUND

[0002] In the field of renewable resource processing and utilization, for example, the processing and utilization of recycled paper, the related process can be seen in the disclosure (announcement) No. CN102400407A "a waste paper recycling paperboard process", the process steps are as follows: first, the waste paper is stirred in the pulping tank until the paper is turned into pulp; second, the pulp mixture in the pulping tank is input into the paperboard machine for processing and filtering, and the paperboard machine processes the paperboard semi-finished product containing water; third, the water collected after filtering and splashing on the paperboard machine is input into the storage tank; fourth, the water in the storage tank is input into the pulping tank for repeated use; fifth, the paperboard semi-finished product with water is placed in a heating furnace for baking, and after drying, it becomes a paperboard product. The heating furnace has a water vapor recovery device at the top, and the recovered water vapor is input into the pulping tank.

[0003] In the above-mentioned processing and utilization process of recycled paper, only manual sorting can be used at present, mainly for sorting large pieces and visible impurities, and preliminarily classifying paper of different densities (such as corrugated paper, printing paper, kraft paper, etc.), the rest cannot be sorted again, and the sorting workload is huge and the efficiency is low.

[0004] The existing sorting of paper products is based on complete finished products, for example: the disclosure No. CN108995293A discloses "a corrugated paper processing intelligent sorting system", which mainly uses intelligent sorting to sort, the intelligent sorting includes three sorting systems one, two and three connected by a conveying device, and each sorting system has an identification system for identifying different paperboard size two-dimensional code number at the inlet;

[0005] a, pre-set the sorting system one to transfer A size corrugated paperboard, corresponding to two-dimensional code one, the sorting system two to transfer B size corrugated paperboard, corresponding to two-dimensional code two, and the sorting system three to transfer C size corrugated paperboard, corresponding to two-dimensional code three;

[0006] b, the conveying belt transfers different specifications of corrugated paperboard to the sorting system one, the identification system of the sorting system one identifies the corresponding two-dimensional code one, and the A size corrugated paperboard meeting the requirements is transferred into the sorting system one, the remaining corrugated paperboard enters the sorting system two, the identification system of the sorting system two identifies the corresponding two-dimensional code two, and the B size corrugated paperboard meeting the requirements is transferred into the sorting system two, and the identification system of the sorting system three identifies the corresponding two-dimensional code three, and the C size corrugated paperboard meeting the requirements is transferred into the sorting system three.

[0007] For example, the disclosure of CN110255259B discloses an "intelligent paper sorting device", which discloses an "intelligent paper sorting device", which comprises a rack, a paper inlet, a scanning paper outlet and a sorting paper outlet are arranged on the rack, the scanning paper outlet is arranged on the table plate, and the table plate is installed on the rack; The inside of the rack is installed with: a paper feeding module for placing stacked paper and feeding each paper to the scanning module; a scanning module; a switching module for switching the scanned paper to the scanning paper outlet or the sorting paper outlet; a shunt module for reciprocatingly conveying the paper between the sorting modules, and finally inputting the paper into the turnover module; a turnover module for turning over the paper to the head-tail reversing module; a reversing module for reversing the head-tail of the paper, and then conveying the paper to the storage module; a sorting module for inputting the paper from the shunt module into one of the two sorting modules, or selecting the paper in the two sorting modules and conveying it to the shunt module.

[0008] Therefore, by the prior art, the raw materials for recycled paper cannot be intelligently sorted at present. The raw materials for recycled paper usually contain large pieces of sundries (wood, stones, metal blocks, mud blocks, etc.). If they are not cleaned, they are directly poured into the pulping tank for pulping and stirring. First, some small sundries are easy to mix into the paper pulp, causing the quality of the paper pulp to decrease. Second, a large amount of sundries accumulates in the pulping tank over time, and regular cleaning is more time-consuming and labor-intensive. Therefore, the present application is proposed. SUMMARY

[0009] The present application provides a renewable resource processing and utilization intelligent production line to overcome the shortcomings of the prior art. The specific technical solutions are as follows:

[0010] A renewable resource processing and utilization intelligent production line, comprising a chopping module, a screening module, a pulping tank, a paperboard machine, and a paper drying machine. The chopping module chops the raw materials for recycled paper to obtain paper scraps. The screening module screens and removes impurities from the paper scraps to obtain refined paper materials. The refined paper materials are stirred and pulped in the pulping tank to obtain raw paper pulp. The raw paper pulp is processed in the paperboard machine to obtain wet paperboard. The wet paperboard is dried in the paper drying machine to obtain finished paper. The screening module is an intelligent grading and impurity removal screening device. The intelligent grading and impurity removal screening device is used at least three times to screen and remove impurities from the paper scraps to obtain refined paper materials according to types.

[0011] Further improvements, the intelligent grading and impurity removal screening device comprises an inclined screen mesh conveying mechanism and a horizontal screen mesh conveying mechanism. The inclined screen mesh conveying mechanism comprises an upper driving roller, a lower driven roller, and a mesh-shaped insulating conveyor belt adapted to the upper driving roller and the lower driven roller. The mesh-shaped insulating conveyor belt has an electrostatic generator inside.

[0012] In a further improvement, the horizontal screen conveying mechanism includes a first rotating roller, a second rotating roller, and a mesh metal conveyor belt adapted to the first and second rotating rollers. The second rotating roller is located below the lower driven roller. A scraper is provided between the mesh insulating conveyor belt at the lower driven roller and the mesh metal conveyor belt at the second rotating roller. The included angle between the scraper and the axial direction of the mesh insulating conveyor belt is δ, 80°≤δ≤90°; the included angle between the scraper and the axial direction of the mesh metal conveyor belt is γ, 65°≤γ≤80°; a collection trough is provided below the mesh metal conveyor belt; an air blowing box is provided on one side of the mesh metal conveyor belt, and a collection cylinder is provided on the other side of the mesh metal conveyor belt. The collecting cylinder includes a horizontal cylinder and a vertical cylinder. The tail end of the horizontal cylinder is connected to the upper end of the vertical cylinder. A blower for blowing downwards is embedded in the upper part of the tail end of the horizontal cylinder. A vertical curtain is provided inside the horizontal cylinder, and the upper end of the vertical curtain is fixedly connected to the inner wall of the horizontal cylinder. The interior of the horizontal cylinder is divided by the vertical curtain into an air inlet chamber located at the air inlet of the horizontal cylinder and a buffer chamber connected to the inner cavity of the vertical cylinder. A sloping section is provided on the lower side of the connection between the horizontal cylinder and the vertical cylinder, and a gap is provided between the sloping section and the lower end of the vertical curtain. A protrusion with an arc-shaped cross-section is provided on the lower side of the air inlet of the horizontal cylinder. The air blown by the blower is directed towards the buffer chamber, and the air blown by the blower box is directed towards the air inlet of the horizontal cylinder.

[0013] In a further improvement, the raw materials for the recycled paper include one or more of the following: corrugated paper, kraft paper, newsprint, offset paper, writing paper, coated paper, dictionary paper, stamp paper, and security paper.

[0014] In a further improvement, a material blocking and static elimination mechanism is provided directly above the first rotating roller. The material blocking and static elimination mechanism includes a lifting plate, and multiple baffles are connected to the lower part of the lifting plate. The ends of the baffles are in contact with the mesh metal conveyor belt.

[0015] In a further improvement, both the curtain and the vertical curtain are made of multi-layer metallized thin film composite, with the metal coating of the outermost metallized thin film grounded.

[0016] In a further improvement, the inclined screen conveying mechanism also includes a fixed bracket for supporting the upper drive roller and a lifting bracket for supporting the lower driven roller. The upper part of the fixed bracket is rotatably connected to the roller shaft of the upper drive roller, and the upper part of the lifting bracket is rotatably connected to the roller shaft of the lower driven roller. The lifting bracket is used to adjust the height of the lower driven roller off the ground.

[0017] In a further improvement, the angle between the axial direction of the mesh insulated conveyor belt and the horizontal plane is λ, where 1°≤λ≤45°.

[0018] In a further improvement, the scraper is rotatably configured and has an "I" or "V" shaped structure.

[0019] Further improvement, in the operation of the intelligent grading impurity removal screening device, the blowing box continuously blows, the blowing machine intermittently blows, and the initial wind speed at the blowing machine is less than that at the blowing box.

[0020] The beneficial effects of the present application are:

[0021] 1. The renewable resource processing and utilization intelligent production line can recycle and reuse the three types of waste paper, corrugated paper, cultural and printing paper, or kraft paper, and make renewable paper, which is energy-saving, environment-friendly, intelligent production, labor-saving, and cost-reducing.

[0022] 2. The intelligent grading impurity removal screening device can sort out corrugated paper, cultural and printing paper, and kraft paper from the paper scraps, and automatically remove large impurities such as wood, stones, metal blocks, and mud blocks, which is intelligent sorting, good sorting effect, high impurity removal effect, high automation degree, can help improve the quality of raw pulp and improve the quality of finished products. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure diagram of the intelligent grading impurity removal screening device is shown in the figure.

[0024] Figure 2 The structure diagram of the horizontal screen conveying mechanism is shown in the figure.

[0025] Figure 3 The structure diagram of the inclined screen conveying mechanism is shown in the figure.

[0026] Figure 4 The connection diagram of the blowing box, the collecting cylinder, and the mesh metal conveyor belt is shown in the figure.

[0027] Figure 5 The structure diagram of the collecting cylinder is shown in the figure. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0029] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Embodiment 1

[0032] The renewable resource processing and utilization intelligent production line comprises a chopping module, a screening module, a beating pool, a paperboard machine and a paper drying machine. The chopping module chops renewable paper raw materials to obtain paper scraps. The screening module screens and removes impurities from the paper scraps to obtain refined paper materials. The refined paper materials are stirred and beaten in the beating pool to obtain raw paper pulp. The raw paper pulp is processed in the paperboard machine to obtain wet paperboard. The wet paperboard is baked in the paper drying machine to obtain finished paper, which is the renewable paper.

[0033] The screening module is an intelligent grading and impurity removal screening device. The intelligent grading and impurity removal screening device is used in combination with at least three devices to screen and remove impurities from the paper scraps at least three times to obtain refined paper materials distributed according to types.

[0034] The renewable paper raw materials include corrugated paper, cultural and printing paper or kraft paper. The cultural and printing paper is one or more of newsprint, offset paper, writing paper, copperplate paper, dictionary paper, stamp paper and security paper.

[0035] The raw paper pulp obtained in the production process can also be used for processing of other products, such as paper egg holders and corrugated paper. The finished paper can also be used for additional value products such as paperboard and cartons after secondary processing.

[0036] Embodiment 2

[0037] As Figures 1 to 3As shown, the intelligent hierarchical impurity removal screening device includes an inclined screen mesh conveying mechanism 10 arranged in an inclined manner, and a horizontal screen mesh conveying mechanism 30 arranged in a horizontal manner. The inclined screen mesh conveying mechanism 10 includes an upper driving roller 11, a lower driven roller 12, and a mesh-shaped insulating conveyor belt 13 matched with the upper driving roller 11 and the lower driven roller 12. An electrostatic generator 20 is arranged inside the mesh-shaped insulating conveyor belt 13.

[0038] Firstly, the shredded paper falls onto the mesh-shaped insulating conveyor belt 13 on the upper driving roller 11. The electrostatic generator 20 preferably adopts the electrostatic generator of Shanghai Purema Electronics Co., Ltd. and sprays compressed air with static electricity to exert static electricity on the mesh-shaped insulating conveyor belt 13. Due to the effect of electrostatic adsorption, some small and light shredded paper will be adsorbed to the surface of the mesh-shaped insulating conveyor belt 13. The mesh-shaped insulating conveyor belt 13 moves correspondingly under the driving of the upper driving roller 11 and the lower driven roller 12 and can transport the shredded paper on the upper surface of the mesh-shaped insulating conveyor belt 13 to the horizontal screen mesh conveying mechanism 30. Due to the inclined arrangement of the axial direction of the mesh-shaped insulating conveyor belt 13, under the multiple effects of electrostatic adsorption force, gravity of the shredded paper itself, etc., the inclined screen mesh conveying mechanism 10 can adsorb some small and light shredded paper (such as kraft paper with a length less than 3 cm). These small and light shredded paper can be scraped off in the subsequent process.

[0039] In addition, it should be noted that the conveying direction of the upper half of the mesh-shaped insulating conveyor belt 13 between the upper driving roller 11 and the lower driven roller 12 is from the upper driving roller 11 to the lower driven roller 12.

[0040] Example 3

[0041] As Figure 2 , 4As shown in FIG. 5, the horizontal screen conveying mechanism 30 comprises a first rotating roller 32, a second rotating roller 33, a mesh metal conveyor belt 31 matched with the first rotating roller 32 and the second rotating roller 33, the second rotating roller 33 is located below the lower driven roller 12, a scraper 60 is arranged between the mesh insulation conveyor belt 13 at the lower driven roller 12 and the mesh metal conveyor belt 31 at the second rotating roller 33, the included angle between the scraper 60 and the axial direction of the mesh insulation conveyor belt 13 is δ, 80°≤δ≤90°; the included angle between the scraper 60 and the axial direction of the mesh metal conveyor belt 31 is γ, 65°≤γ≤80°; the lower side of the mesh metal conveyor belt 31 is provided with a collecting groove 40; one side of the mesh metal conveyor belt 31 is provided with a blowing box 70, the other side of the mesh metal conveyor belt 31 is provided with a collecting cylinder 80, the collecting cylinder 80 comprises a transverse cylinder 81 and a longitudinal cylinder 82, the tail end of the transverse cylinder 81 is communicated with the upper end of the longitudinal cylinder 82, a blower 83 blowing downward is embedded in the upper part of the tail end of the transverse cylinder 81, a vertical curtain 85 is arranged in the transverse cylinder 81, the upper end of the vertical curtain 85 is fixedly connected with the inner wall of the transverse cylinder 81; the inside of the transverse cylinder 81 is divided into an air inlet cavity 86 located at the air inlet of the transverse cylinder 81 and a buffer chamber 87 communicated with the inner cavity of the longitudinal cylinder 82 by the vertical curtain 85, an inclined section 84 is arranged at the lower side of the connection between the transverse cylinder 81 and the longitudinal cylinder 82, a gap is arranged between the inclined section 84 and the lower end of the vertical curtain 85; a convex part 88 with an arc-shaped cross section is arranged at the lower side of the air inlet of the transverse cylinder 81; the air blown by the blower 83 is aimed at the buffer chamber 87, and the air blown by the blowing box 70 is aimed at the air inlet of the transverse cylinder 81.

[0042] Some large-volume and heavy-quality paper scraps fall on the mesh metal conveyor belt 31, the running direction of the upper half of the mesh metal conveyor belt 31 between the first rotating roller 32 and the second rotating roller 33 is from the second rotating roller 33 to the first rotating roller 32. The mesh metal conveyor belt 31 can be grounded by metal wire dynamic contact, so as to remove static electricity from the surface of the mesh metal conveyor belt 31, the simplest method of dynamic contact is that one end of the metal wire is fixed and the other end is in contact with the mesh metal conveyor belt 31.

[0043] The first roller 32 is provided with a material blocking and static electricity removing mechanism 50 and a scraper 60, so that the left and right ends of the mesh metal conveyor belt 31 are relatively closed. In this way, the wind blown out by the blowing box 70 can blow some medium-sized and medium-weight paper scraps (for example, corrugated paper blocks with a length of less than 1 cm) into the collecting cylinder 80 and be collected. Finally, the remaining large-sized and heavy paper scraps (for example, corrugated paper blocks with a length of more than 1 cm and some heavy impurities such as wood, stones, metal blocks, and mud blocks) will fall into the collecting groove 40. Finally, the materials in the collecting groove 40 can be poured onto the upper surface of the mesh metal conveyor belt 31 again. By increasing the flow rate of the wind blown out by the blowing box 70, a large amount of corrugated paper blocks and some heavy impurities can be separated.

[0044] The blowing box 70 is externally connected to compressed air, and a plurality of air holes are arranged at the blowing port of the blowing box 70.

[0045] The scraper 60 is mainly used to scrape the surface of the mesh insulation conveyor belt 13, and does not scrape the surface of the mesh metal conveyor belt 31. There is a gap of 2-3 mm between the two.

[0046] The blowing box 70 continuously blows, the blowing fan 83 intermittently blows, and the initial wind speed at the blowing fan 83 is less than the initial wind speed at the blowing box 70.

[0047] The collecting principle of the collecting cylinder 80 is as follows:

[0048] The paper scraps blown by the blowing box 70 to the air inlet of the horizontal cylinder 81 enter the air inlet cavity 86, then enter the inner cavity of the vertical cylinder 82 through the inclined section 84, and are finally collected.

[0049] At the beginning, since the protruding part 88 and the vertical curtain 85 are not arranged, even if strong wind is blown out by the blowing fan 83, although micro-clogging can be effectively avoided at the lower part of the vertical cylinder 82, it is found in actual use that there are the following two defects: 1) paper scraps are easily scattered at the air inlet of the horizontal cylinder 81, which greatly affects the collecting effect; 2) in addition, whether the blowing fan 83 blows continuously or intermittently, under the condition that the volume and structure are the same (for example, the volume is 3.3m 3 The maximum collection rate of the paper scraps collected from the lower end of the vertical cylinder 82 is not more than 30 kg / h.

[0050] In the development process, it is considered that the purpose of arranging the protruding part 88 is to block some heavy impurities. Whether the cross section of the protruding part 88 is arc-shaped or inverted V-shaped, it can effectively block some heavy impurities, and the corrugated paper blocks will be turned over under the action of the wind and can pass through the protruding part 88.

[0051] If the initial air speed at the blower 83 is greater than the initial air speed at the blow box 70, a portion of the shredded paper in the transverse cylinder 81 will spill out. If the initial air speed at the blower 83 is equal to the initial air speed at the blow box 70, a portion of the shredded paper will spill out, and the final collection rate will be maximally 36 kg / h.

[0052] Preferably, the initial air speed at the blower 83 is less than the initial air speed at the blow box 70, and the intermittent blowing at the blower 83 is used to further improve the collection effect.

[0053] In the present application, because the vertical curtain 85, the protruding portion 88, and the intermittent blowing at the blower 83 are used, the final collection rate can exceed 82 kg / h.

[0054] If only the vertical curtain 85 is not provided, and the rest are the same, the final collection rate will be maximally 43 kg / h.

[0055] If only the protruding portion 88 is not provided, and the rest are the same, the final collection rate will be maximally 33 kg / h.

[0056] If the pulsed blowing at the blower 83 is used, and the rest are the same, the final collection rate will be maximally 51 kg / h.

[0057] In this context, the intermittent blowing at the blower 83 means that the blowing is stopped after a period of continuous blowing, for example, blowing at a speed of 22 ± 1 m / s for 10 s, and then stopping blowing for 2 s. The pulsed blowing is always blowing, but the speed fluctuates in a peak shape in the order of first increasing and then decreasing, for example, the speed increases from 2 m / s to 22 m / s in the first 5 s, and then decreases from 22 m / s to 2 m / s; then it increases from 2 m / s to 22 m / s again, and so on.

[0058] The vertical curtain 85 is intermittently blown at the buffer chamber 87, which will constantly swing; the vertical curtain 85 itself is made of metallized film, and because the shredded paper cannot be completely removed from the static electricity, some shredded paper will inevitably be adsorbed on the vertical curtain 85, which will be collected by the constant swinging, and the slight accumulation of the protruding portion 88, combined with the action of the wind, when it is collected to a certain extent, the shredded paper at the vertical curtain 85, the protruding portion 88, etc. can be "sucked" to the lower part of the longitudinal cylinder 82 at one time, and then discharged through the lower end of the longitudinal cylinder 82, and the collection rate can be significantly improved.

[0059] Example 4

[0060] As Figure 1 , 2As shown, the first roller 32 is provided with a material blocking and static electricity removing mechanism 50 above it, which comprises a lifting plate 51, the lower part of which is connected with a plurality of curtains 52, the ends of which are in contact with the mesh metal conveyor belt 31.

[0061] Firstly, the lifting plate 51 only needs to have a lifting function, for example, a cylinder can be used to drive the lifting. Secondly, the curtain 52 can be conductive, and grounding can remove the static electricity on the surface of the mesh metal conveyor belt 31.

[0062] When the paper scraps on the surface of the mesh metal conveyor belt 31 are blown, the lifting plate 51 needs to be lowered, and the lower end of the lifting plate 51 needs to have a gap of 1±0.5 cm with the mesh metal conveyor belt 31 to prevent interference. The curtain 52 can block most of the paper scraps.

[0063] Under the blocking of the lifting plate 51 and the scraper 60, the paper scraps on the surface of the mesh metal conveyor belt 31 can be blown into the collecting cylinder 80.

[0064] Example 5

[0065] In example 4, the curtain 52 and the vertical curtain 85 are both made of a plurality of layers of metallized film composite, and the metal plating layer of the metallized film on the outermost layer is grounded, that is, it is grounded through conduction, which is convenient for static electricity removal.

[0066] If a metal foil is used, it is not easy to swing. For example, aluminum foil has excellent conductivity, but in the vertical curtain 85, the vertical curtain 85 itself needs to have a certain swing performance, in addition, the vertical curtain 85 selects the metallized film, one side of which needs to be able to absorb a certain amount of paper scraps, so as to facilitate subsequent one-time cleaning of the paper scraps; on the other hand, it needs to have a certain static electricity removing effect, therefore, the metallized film is preferred.

[0067] Example 6

[0068] The inclined screen conveying mechanism 10 further comprises a fixed support 14 for supporting the upper driving roller 11 and a lifting support 15 for supporting the lower driven roller 12, the upper part of the fixed support 14 is rotationally connected with the roller shaft of the upper driving roller 11, and the upper part of the lifting support 15 is rotationally connected with the roller shaft of the lower driven roller 12, the lifting support 15 is used to adjust the ground clearance of the lower driven roller 12.

[0069] Because the density and rest angle of the raw material for recycled paper are different, the ground clearance of the lower driven roller 12 needs to be adjusted according to the actual situation. The ground clearance of the lower driven roller 12 is different, which causes the angle between the axial direction of the mesh insulated conveyor belt 13 and the horizontal plane to change. Finally, the angle between the axial direction of the mesh insulated conveyor belt 13 and the horizontal plane is λ, 1°≤λ≤45°, which can meet the use requirements of the raw material for recycled paper being corrugated paper, kraft paper, newsprint, offset paper, writing paper, coated paper, dictionary paper, stamp paper, and security paper.

[0070] In the above embodiment, the scraper 60 is rotationally arranged. At the beginning, the scraper 60 is rotationally arranged so that the scraper 60 does not contact the mesh insulated conveyor belt 13, thereby not playing a role of scraping. After one cycle of operation, when it is necessary to scrape the attached paper scraps on the surface of the mesh insulated conveyor belt 13, the scraper 60 is rotated so that the scraper 60 can scrape the surface of the mesh insulated conveyor belt 13. In order to ensure the scraping effect of the paper scraps, 80°≤δ≤90°. When δ=95°, it is found that the scraping is not complete. When the attached paper scraps are thick, more than 80% of the paper scraps are scraped away, and some paper scraps remain and then advance with the mesh insulated conveyor belt 13 and then pass through the gap between the mesh insulated conveyor belt 13 and the scraper 60. When δ=75°, it is found that the service life of the scraper 60 is reduced and the scraper 60 is severely worn. When the scraper 60 is a “V”-shaped structure, the scraper 60 can be made of an elastic plate.

[0071] Finally, a large amount of wood, stones, metal blocks, mud blocks, and other sundries accumulated near the lifting plate 51 can be removed by lifting the lifting plate 51 upward, so that the wood, stones, metal blocks, mud blocks, and other sundries accumulated on the surface of the mesh metal conveyor belt 31 advance with the mesh metal conveyor belt 31 and then are removed. Subsequently, new paper scraps can be screened.

[0072] The raw material for recycled paper currently commonly used mainly includes three types, including corrugated paper, cultural and printing paper, or kraft paper. The cultural and printing paper is one or more of newsprint, offset paper, writing paper, coated paper, dictionary paper, stamp paper, and security paper.

[0073] The grammage and properties of the three types of paper, i.e., corrugated paper, cultural and printing paper, or kraft paper, are quite different, so three intelligent grading and impurity removing screening devices need to be used in combination. Each intelligent grading and impurity removing screening device can separate the corrugated paper, cultural and printing paper, and kraft paper in the paper scraps by setting the wind speed, the advancing speed of the conveyor belt, and other parameters, thereby having a good separation effect and a high degree of automation.

[0074] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An intelligent production line for processing and utilizing renewable resources, comprising a chopping module, a screening module, a beating pool, a paperboard machine, and a paper drying machine, wherein the chopping module chops raw materials for recycled paper to obtain paper scraps, the screening module screens the paper scraps to remove impurities and obtain refined paper material, the refined paper material is stirred and beaten in the beating pool to obtain raw paper pulp, the raw paper pulp is processed in the paperboard machine to obtain wet paperboard, and the wet paperboard is baked in the paper drying machine to obtain finished paper. The screening module is an intelligent grading impurity removal screening device, and at least three intelligent grading impurity removal screening devices are used to screen the paper scraps at least three times to obtain the refined paper scraps distributed according to types; The intelligent grading impurity removal screening device comprises an inclined screen mesh conveying mechanism (10) arranged in an inclined manner and a horizontal screen mesh conveying mechanism (30) arranged in a horizontal manner, the inclined screen mesh conveying mechanism (10) comprises an upper driving roller (11), a lower driven roller (12) and a mesh-shaped insulating conveying belt (13) matched with the upper driving roller (11) and the lower driven roller (12), and an electrostatic generator (20) is arranged in the mesh-shaped insulating conveying belt (13); The horizontal screen mesh conveying mechanism (30) comprises a first rotating roller (32), a second rotating roller (33) and a mesh-shaped metal conveying belt (31) matched with the first rotating roller (32) and the second rotating roller (33), the second rotating roller (33) is located below the lower driven roller (12), a scraper (60) is arranged between the mesh-shaped insulating conveying belt (13) at the lower driven roller (12) and the mesh-shaped metal conveying belt (31) at the second rotating roller (33), an included angle δ between the scraper (60) and the axial direction of the mesh-shaped insulating conveying belt (13) is 80°≤δ≤90°, an included angle γ between the scraper (60) and the axial direction of the mesh-shaped metal conveying belt (31) is 65°≤γ≤80°, a collecting groove (40) is arranged below the mesh-shaped metal conveying belt (31), a blowing box (70) is arranged on one side of the mesh-shaped metal conveying belt (31), and a collecting cylinder (80) is arranged on the other side of the mesh-shaped metal conveying belt (31), the collecting cylinder (80) comprises a transverse cylinder (81) and a longitudinal cylinder (82), the tail end of the transverse cylinder (81) is communicated with the upper end of the longitudinal cylinder (82), a blower (83) blowing air downward is embedded in the upper part of the tail end of the transverse cylinder (81), a vertical curtain (85) is arranged in the transverse cylinder (81), and the upper end of the vertical curtain (85) is fixedly connected with the inner wall of the transverse cylinder (81); the inside of the transverse cylinder (81) is divided into an air inlet cavity (86) located at the air inlet of the transverse cylinder (81) and a buffer chamber (87) communicated with the inner cavity of the longitudinal cylinder (82) by the vertical curtain (85), an inclined section (84) is arranged on the lower side of the connection position of the transverse cylinder (81) and the longitudinal cylinder (82), a gap is arranged between the inclined section (84) and the lower end of the vertical curtain (85), a convex part (88) with an arc-shaped cross section is arranged on the lower side of the air inlet of the transverse cylinder (81), the air blown by the blower (83) is aimed at the buffer chamber (87), and the air blown by the blowing box (70) is aimed at the air inlet of the transverse cylinder (81). During the operation of the intelligent grading impurity removal screening device, the blowing box (70) continuously blows air, the blower (83) intermittently blows air, and the initial air speed at the blower (83) is smaller than the initial air speed at the blowing box (70).

2. The intelligent production line for processing and utilizing renewable resources according to claim 1, characterized in that: The raw material for the recycled paper comprises one or more of corrugated paper, kraft paper, newsprint, offset paper, writing paper, coated paper, dictionary paper, stamp paper and security paper.

3. The intelligent production line for processing and utilizing renewable resources according to claim 1, characterized in that: A material blocking and static elimination mechanism (50) is provided directly above the first rotating roller (32). The material blocking and static elimination mechanism (50) includes a lifting plate (51). The lower part of the lifting plate (51) is connected to multiple baffles (52). The end of the baffles (52) is in contact with the mesh metal conveyor belt (31).

4. The intelligent production line for processing and utilizing renewable resources according to claim 3, characterized in that: Both the curtain (52) and the vertical curtain (85) are made of multiple layers of metallized thin film composite, with the metal coating of the outermost metallized thin film grounded.

5. The intelligent production line for processing and utilizing renewable resources according to claim 1, characterized in that: The inclined screen conveying mechanism (10) further includes a fixed bracket (14) for supporting the upper active roller (11) and a lifting bracket (15) for supporting the lower driven roller (12). The upper part of the fixed bracket (14) is rotatably connected to the roller shaft of the upper active roller (11), and the upper part of the lifting bracket (15) is rotatably connected to the roller shaft of the lower driven roller (12). The lifting bracket (15) is used to adjust the height of the lower driven roller (12) above the ground.

6. The intelligent production line for processing and utilizing renewable resources according to claim 1, characterized in that: The angle between the axial direction of the mesh insulated conveyor belt (13) and the horizontal plane is λ, where 1°≤λ≤45°.

7. The intelligent production line for processing and utilizing renewable resources according to claim 1, characterized in that: The scraper (60) is rotatably mounted and has a straight or V-shaped structure.

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