An improved production process for recycled corrugated medium paper by shaping waste paper

Abstract

The present invention relates to the field of waste paper recycling, and specifically to a production process for recycled corrugated medium paper with improved forming. The drying step includes a fixed roller, a movable roller, and a belt. There are multiple movable rollers. Grooves are provided at the edges of the fixed roller, and the movable rollers are coaxially and rotatably arranged in the grooves. Shaft seats for rotatably connecting the movable rollers are provided on the fixed roller. The belt is sleeved on all the movable rollers. When the paper is being wound, the paper is in a state of being in contact with the surface of the belt and driving the belt to run. A heat conduction mechanism is provided between every two adjacent movable rollers. Through the contact between the belt and the paper, the present invention enables the heat conduction mechanism to indirectly transfer heat to the paper through the belt, ensuring uniform heating and heat transfer of the paper during the drying process. The flexible structure of the belt better adapts to the surface of the paper, enabling the paper to fit more closely when in contact with the belt, which helps to improve the flatness of the paper and ensure the quality of the dried and formed corrugated medium paper.

Description

Technical Field

[0001] The invention relates to the field of waste paper recycling, and in particular to an improved production process for waste paper recycled corrugated core paper. Background Art

[0002] The drying device on the paper production line in the prior art uses multiple heating rollers. The heating rollers are heated by flowing hot water or steam, so that water evaporates when the paper contacts the heating rollers. The prior art uses multiple heating rollers in a staggered manner, allowing the paper to pass through each heating roller one by one, resulting in a drying device with a length of 10 to 100 meters and a height of 3 to 10 meters, occupying a very large space. During the paper conveying process, the paper may not fit the surface of the heating roller, resulting in uneven heating.

[0003] The currently disclosed Chinese patent CN115852728A discloses a waste paper papermaking production method and equipment with an improved wet paper drying process, including a pulping device, a de-impurity device, a rinsing device, a pulping device, a sand settling tray, a concentration device, a pressure box, a pressure pulping box, a wire forming device, a pressing device, a drying device and a rewinding and slitting device which are arranged in sequence. The drying device includes a plurality of drying devices arranged side by side, and the drying device includes a drying box, a water-gas separation mechanism and a driving mechanism. The water-gas separation mechanism is arranged on one side of the drying box, and a drying chamber is arranged inside the drying box. At least two drying groups are arranged at intervals in the upper and lower parts of the drying chamber, and each drying group includes at least two conveying rollers and an infrared heating mechanism which are arranged side by side. The front and rear ends of the two conveying rollers are respectively rotatably mounted on the drying box, and the infrared heating mechanism is arranged between the two conveying rollers. Each conveying roller is respectively connected to the driving mechanism in a transmission manner.

[0004] According to the above patent, the patent uses an infrared heating mechanism to perform thermal radiation drying on wet paper, with high drying efficiency, no need for a heating roller with a larger diameter, reducing the volume of the drying device and reducing the weight of the drying device. However, the patent fails to solve the problem of the fit between the paper and the heating roller. There is still a situation where the paper and the heating roller are not fitted at some point, resulting in uneven heating, which affects the drying and forming effect of the corrugated core paper. Therefore, there is a need for a heating roller that can solve the gap between the paper and the heating roller to ensure uniform drying of the paper. Summary of the invention

[0005] In view of the problems existing in the prior art, an improved waste paper recycled corrugated core paper production process is provided. The present invention uses the contact between the belt and the paper so that the heat conduction mechanism transfers the heat to the paper indirectly through the belt, thereby ensuring uniform heating and heat transfer of the paper during the drying process. The flexible structure of the belt better adapts to the surface of the paper, so that the paper can fit more closely when in contact with the belt, which helps to improve the flatness of the paper and ensure the quality of the drying and forming of the corrugated core paper.

[0006] To solve the problems of the existing technology, the present invention provides an improved production process for recycling waste paper into corrugated medium paper, including the following steps:

[0007] Shredding step: The waste paper recovered is cut into thin strips by a slitting machine to obtain strip-shaped waste paper.

[0008] Pulping step: The strip-shaped waste paper is put into a pulping barrel, recycled water is injected into the pulping barrel, and the strip-shaped waste paper is broken into a pulp state. The pulp in the pulping barrel is shunted to obtain waste paper pulp.

[0009] Impurity removal step: The waste paper pulp is sequentially conveyed to various slag removal devices, and after multiple slag removal treatments, primary pulp is obtained.

[0010] Grinding step: The primary pulp is conveyed to a grinding device for grinding.

[0011] Concentration step: The refined ground pulp is collected. First, the refined ground pulp is sequentially passed through various screening devices for screening to obtain pure refined ground pulp.

[0012] Stock preparation step: The pure refined ground pulp is conveyed to a stock preparation station for stock preparation to obtain papermaking pulp.

[0013] Forming step: The papermaking pulp is conveyed to the wire section forming station of the paper forming production line, formed by the wire section, and conveyed forward through the wire section to obtain a wet pulp layer.

[0014] Drying step: The wet pulp layer is conveyed to a drying device, and the drying device dries it to obtain corrugated medium paper.

[0015] Reeling step: The corrugated medium paper is wound into a reel.

[0016] Among them, the drying device in the drying step includes a fixed roller, movable rollers, and a belt. There are multiple movable rollers, and all the movable rollers are circumferentially distributed on the surface of the fixed roller. The axial direction of the movable rollers is parallel to the axial direction of the fixed roller. A groove larger than the diameter of the movable roller is formed at the edge of the fixed roller, and the movable rollers are coaxially and rotatably arranged in the groove. A shaft seat for the movable rollers to be rotatably connected is provided on the fixed roller. The belt is sleeved on all the movable rollers. When the paper is being wound, the paper is in a state of adhering to the surface of the belt and driving the belt to run. A heat conduction mechanism is provided between every two adjacent movable rollers;

[0017] When the paper 21 is being conveyed, the fixed roller 1 is in a static state, the movable rollers 2 are in a rotating state. During the winding process of the paper 21, it adheres to the surface of the belt 3 to drive the belt 3 to run. The belt 3 moves around all the movable rollers 2, and through the drive of the heat conduction mechanism 5 and the belt 3, it is ensured that the paper 21 is evenly heated and heat transferred during the drying process.

[0018] Preferably, the heat conducting mechanism is provided with an expansion film and end plates. The expansion film is arranged between two movable rollers, and the surface of the expansion film is attached to the inner side of the belt. When the expansion film expands, the belt is in a lifted state and fills the gap between the paper and the belt. There are a pair of end plates, which are symmetrically arranged on both sides of the fixed roller with the middle cross-section perpendicular to the axis of the fixed roller as the symmetry plane. The end plates are fixedly connected to the shaft seats, and the expansion film is fixedly connected between the two end plates. An air inlet is formed on one end plate, and an air outlet is formed on the other end plate.

[0019] Preferably, the expansion film is a hollow structure with both ends penetrating. The inner side of the end plate has a limiting edge around its edge, and the end edge of the expansion film is fixedly connected to the limiting edge. A steam cavity is hermetically formed between the pair of end plates and the expansion film.

[0020] Preferably, the fixed roller has a hollow air cavity. An air inlet is formed on the fixed roller at its axial center position. On the surface of the fixed roller, on one side corresponding to each air inlet formed on the end plate, an air outlet communicating with the hollow air cavity is formed. A gas conduit is provided in communication between each air outlet and the corresponding air inlet.

[0021] Preferably, on each end plate with an air inlet and each end plate with an air outlet, an electric control valve for controlling the opening and closing of the air inlet and the air outlet is respectively fixedly provided.

[0022] Preferably, a tensioning mechanism in contact with the belt is provided at the edge of each movable roller.

[0023] Preferably, the tensioning mechanism is provided with a tensioning roller. The tensioning roller is horizontally arranged between the two end plates. The tensioning roller is located outside the belt and close to the position of the movable roller. The axial direction of the tensioning roller is parallel to the axial direction of the movable roller. Guide rails fixedly connected to the corresponding shaft seats are provided on both sides of the fixed roller. The two ends of the tensioning roller respectively have guide shafts extending outward through the corresponding guide rails. The track direction of the guide rails is parallel to the axial direction of the fixed roller. A connecting shaft is also fixedly provided on the shaft seat. An elastic connecting piece is provided between the connecting shaft and the guide shaft.

[0024] Preferably, the elastic connecting piece is provided with a first connecting rod, a second connecting rod and a torsion spring. One end of the first connecting rod is rotatably connected to the extended end of the guide shaft. One end of the second connecting rod is rotatably connected to the connecting shaft. The other end of the first connecting rod and the other end of the second connecting rod are rotatably connected. The torsion spring is fixedly connected between the second connecting rod and the shaft seat and the torsion spring is sleeved on the connecting shaft.

[0025] Preferably, a monitoring camera for monitoring the contact situation between the belt and the paper is provided on the side of the fixed roller facing the belt.

[0026] The beneficial effects of this application compared with the prior art are:

[0027] 1. Through the contact between the belt and the paper, the heat conduction mechanism transfers heat to the paper indirectly through the belt, ensuring uniform heating and heat transfer during the drying process of the paper. The flexible structure of the belt better adapts to the surface of the paper, enabling the paper to fit more closely when in contact with the belt, reducing possible wrinkles and creases, helping to improve the flatness and quality of the paper, achieving uniform drying of the paper, enhancing the effect of the drying process, and ensuring the quality of the corrugated medium paper during drying and forming.

[0028] 2. The present invention adjusts the contact pressure between the belt and the paper through the expansion and contraction of the expansion film, ensuring effective heat transfer and compensating for the uneven heating that may occur due to the gap between the paper and the belt, achieving uniform drying of the paper and ensuring the quality of the corrugated medium paper during drying and forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional structural schematic diagram of an improved forming process for recycling waste paper into corrugated medium paper.

[0030] Figure 2 is a partial three-dimensional structural sectional view of an improved forming process for recycling waste paper into corrugated medium paper.

[0031] Figure 3 is a left side plan view of an improved forming process for recycling waste paper into corrugated medium paper.

[0032] Figure 4 is a partial three-dimensional structural sectional view of the heat conduction mechanism of an improved forming process for recycling waste paper into corrugated medium paper.

[0033] Figure 5 is Figure 4 an enlarged schematic view of part A of

[0034] Figure 6 is Figure 2 an enlarged schematic view of part B of

[0035] Figure 7 is Figure 3 an enlarged schematic view of part C of

[0036] Figure 8 is a partial three-dimensional structural exploded view of an improved forming process for recycling waste paper into corrugated medium paper.

[0037] Figure 9 is Figure 8 an enlarged schematic view of part D of

[0038] Figure 10 is a schematic diagram of the conveying state of the paper drying step in an improved forming process for recycling waste paper into corrugated medium paper.

[0039] Figure 11 It is a schematic diagram of the monitoring range state of a monitoring camera for improving the production process of recycled corrugated medium paper made from waste paper.

[0040] In the figure, the reference numerals are: 1, fixed roller; 11, groove; 12, middle air cavity; 13, air inlet; 14, air outlet; 15, frame; 2, movable roller; 21, paper; 3, belt; 4, shaft seat; 5, heat conduction mechanism; 51, expansion film; 52, end plate; 521, inflation port; 5211, electric control valve; 522, air release port; 523, limit edge; 53, air duct; 6, tensioning mechanism; 61, tensioning roller; 611, guide shaft; 62, guide rail; 63, connecting shaft; 64, elastic connecting member; 641, first connecting rod; 642, second connecting rod; 643, torsion spring; 7, monitoring camera. Specific implementation mode

[0041] In order to further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation modes.

[0042] An improved production process for recycled corrugated medium paper made from waste paper includes the following steps:

[0043] Shredding step: The waste paper recovered is cut into thin strips by a slitting machine to obtain strip-shaped waste paper.

[0044] Pulping step: The strip-shaped waste paper is put into a pulping barrel, circulating water is injected into the pulping barrel, and the strip-shaped waste paper is broken into a pulp state, and the pulp in the pulping barrel is shunted to obtain waste paper pulp.

[0045] Debris removal step: The waste paper pulp is sequentially conveyed to various slag removal devices, and after multiple slag removal treatments, primary pulp is obtained.

[0046] Grinding step: The primary pulp is conveyed to a grinding device for grinding.

[0047] Concentration step: The refined ground pulp is collected. First, the refined ground pulp is sequentially passed through various screening devices for screening to obtain pure refined ground pulp.

[0048] Stock preparation step: The pure refined ground pulp is conveyed to a stock preparation station for stock preparation to obtain papermaking pulp.

[0049] Forming step: The papermaking pulp is conveyed to the forming station of the paper forming production line, formed by the forming section, and conveyed forward through the forming section to obtain a wet pulp layer.

[0050] Drying step: The wet pulp layer is conveyed to a drying device and dried by the drying device to obtain corrugated medium paper.

[0051] Rewinding step: The corrugated medium paper is wound into a reel.

[0052] See Figures 1 - 5 As shown, the drying step includes a fixed roller 1, movable rollers 2 and a belt 3. There are multiple movable rollers 2, and all the movable rollers 2 are circumferentially distributed on the surface of the fixed roller 1. The axial direction of the movable rollers 2 is parallel to the axial direction of the fixed roller 1. A groove 11 larger than the diameter of the movable roller 2 is formed at the edge of the fixed roller 1. The movable roller 2 is coaxially and rotatably arranged in the groove 11. A shaft seat 4 for the rotatable connection of the movable roller 2 is provided on the fixed roller 1. The belt 3 is sleeved on all the movable rollers 2. When the paper 21 is being wound up, the paper 21 is in a state of adhering to the surface of the belt 3 and driving the belt 3 to run. A heat conduction mechanism 5 is provided between every two adjacent movable rollers 2.

[0053] The fixed roller 1 is fixedly installed on the frame 15. The paper 21 is the wet pulp layer. When the paper 21 is being conveyed, the fixed roller 1 is in a stationary state and the movable rollers 2 are in a rotating state. The paper 21 adheres to the surface of the belt 3 during the winding process to drive the belt 3 to run. The belt 3 moves around all the movable rollers 2, and the heat conduction mechanism 5 and the drive of the belt 3 ensure the uniform heating and heat transfer of the paper 21 during the drying process. The heat conduction mechanism 5 transfers heat to the belt 3. As the paper 21 comes into contact with the belt 3, the paper 21 is heated by the heat of the belt 3. With the support of multiple movable rollers 2 for the belt 3, the belt 3 can be supported more evenly. Since the movable rollers 2 are distributed on the entire surface of the fixed roller 1, the pressure and friction can be better dispersed, which helps to reduce the wear of the belt 3 and improve the transmission stability. In addition, using multiple movable rollers 2 can also better maintain the flatness and stability of the paper 21 during the drying process, thereby improving the drying efficiency and quality. The flexible structure of the belt 3 can better adapt to the surface characteristics and irregular shapes of the paper 21, so that the paper 21 can fit more closely when in contact with the belt 3, reducing the possible wrinkles and creases, which helps to improve the flatness and quality of the paper 21. The flexible structure of the belt 3 can also reduce the pressure and friction on the contact surface, reduce the wear on the surface of the paper 21, help to reduce the damage of the paper 21 and improve the service life. In addition, the flexible structure of the belt 3 can also reduce the generation of static electricity to a certain extent, reduce the possibility of the paper 21 adsorbing dust and impurities, and is beneficial to improving the cleanliness and quality of the paper 21. Compared with the rigid contact between the paper 21 and the fixed roller 1, it can better ensure the close fit between the paper 21 and the belt 3, reduce wear and damage, and improve the quality and stability of the paper 21, which is beneficial to drying.

[0054] See Figures 3 - 8As shown, the heat conduction mechanism 5 is provided with an expansion film 51 and end plates 52. The expansion film 51 is arranged between two movable rollers 2, and the surface of the expansion film 51 is attached to the inner side of the belt 3. When the expansion film 51 expands, the belt 3 is in a lifted state and compensates for the gap between the paper 21 and the belt 3. There are a pair of end plates 52, and the pair of end plates 52 are symmetrically arranged on both sides of the fixed roller 1 with the middle section perpendicular to the axis direction of the fixed roller 1 as the symmetry plane. The end plates 52 are fixedly connected to the shaft seats 4, and the expansion film 51 is fixedly connected between the two end plates 52. An air inlet 521 is opened on one end plate 52, and an air outlet 522 is opened on the other end plate 52.

[0055] The surface of the expansion film 51 arranged between every two movable rollers 2 is attached to the inner side of the belt 3. When the expansion film 51 expands, it will lift the belt 3, thereby compensating for the gap between the paper 21 and the belt 3, helping to ensure the close contact between the paper 21 and the belt 3 to improve the heat transfer efficiency and keep the paper 21 evenly heated. The expansion film 51 is fixedly connected between the two end plates 52. An air inlet 521 is opened on one end plate 52 for injecting steam to expand the function of the expansion film 51, and an air outlet 522 is opened on the other end plate 52 for discharging steam to reduce the function of the expansion film 51. As the steam is injected into the expansion film 51, the heat in the steam is conducted through the expansion film 51 to the belt 3, and then indirectly conducted to the paper 21, achieving the effect of drying the paper 21.

[0056] See Figures 4 - 8 As shown, the expansion film 51 is a hollow structure with both ends penetrating. The inner side of the end plate 52 has a limiting edge 523 around its edge, and the end edge of the expansion film 51 is fixedly connected to the limiting edge 523. A steam cavity is hermetically formed between the pair of end plates 52 and the expansion film 51.

[0057] The two end plates 52 ensure the fixed position of the expansion film 51. The steam cavity hermetically formed between the pair of end plates 52 and the expansion film 51 is used to transfer steam or other heating media to adjust the expansion and contraction of the expansion film 51, and further adjust the contact pressure between the belt 3 and the paper 21 and the heat transfer effect. After the expansion film 51 presses against the belt 3, the expansion film 51 will lift the belt 3 and make it contact with the paper 21, but the expansion film 51 itself will not affect the normal operation of the belt 3. The expansion film 51 is usually made of a soft and elastic material, so even if it is pressed, the belt 3 can still continue to run normally on the movable rollers 2.

[0058] See Figure 2 、 Figure 4 、 Figure 7 and Figure 8As shown in the figure, the fixed roller 1 has a hollow air cavity 12. An air inlet 13 is provided on the fixed roller 1 at its axial center position. On the surface of the fixed roller 1, on one side corresponding to each inflation port 521 opened on each end plate 52, an air outlet 14 communicating with the hollow air cavity 12 is provided. A guide air pipe 53 is communicatively provided between each air outlet 14 and the corresponding inflation port 521.

[0059] When the expansion film 51 is inflated, steam is filled through the air inlet 13 on the fixed roller 1 and discharged through the air outlet 14. Since a guide air pipe 53 is communicatively provided between each air outlet 14 and the corresponding inflation port 521, it is ensured that the steam can flow from the air outlet 14 to the inflation port 521, realizing the uniform charging and discharging of gas to adjust the inflation pressure and heat transfer effect of the expansion film 51.

[0060] See Figure 7 and Figure 8 As shown in the figure, on each end plate 52 provided with an inflation port 521 and each end plate 52 provided with a deflation port 522, an electric control valve 5211 for controlling the opening and closing of the inflation port 521 and the deflation port 522 is respectively fixed.

[0061] The electric control valve 5211 realizes the control of the charging and discharging of steam and adjusts the inflation degree of the expansion film 51. Each expansion film 51 can be independently controlled, and precise pressing can be performed on different positions of the belt 3 according to specific needs to adapt to the fitting of the paper 21, so as to reduce energy consumption and save energy.

[0062] See Figure 2 As shown in the figure, a tensioning mechanism 6 in contact with the belt 3 is provided at the edge of each movable roller 2.

[0063] The tensioning mechanism 6 ensures the normal operation of the belt 3 on the movable roller 2 and maintains an appropriate tension degree to ensure the stability and reliability of the belt 3 during the conveying process, helps to reduce the deviation and slipping of the belt 3, and also helps to extend the service life of the belt 3 and the movable roller 2, ensuring that the conveying of the paper 21 drives the belt 3 to run together.

[0064] See Figure 2 、 Figure 7 、 Figure 8 and Figure 9As shown, the tensioning mechanism 6 is provided with a tensioning roller 61. The tensioning roller 61 is horizontally mounted between two end plates 52. The tensioning roller 61 is located outside the belt 3 and close to the position of the movable roller 2. The axial direction of the tensioning roller 61 is parallel to the axial direction of the movable roller 2. Guide rails 62 fixedly connected to the corresponding shaft seats 4 are provided on both sides of the fixed roller 1. Both ends of the tensioning roller 61 respectively have guide shafts 611 extending outward through the corresponding guide rails 62. The track direction of the guide rails 62 is parallel to the axial direction of the fixed roller 1. A connecting shaft 63 is also fixedly provided on the shaft seat 4. An elastic connecting member 64 is provided between the connecting shaft 63 and the guide shaft 611.

[0065] The tensioning mechanism 6 is to ensure that the tensioning roller 61 can maintain an appropriate tensioning force and provide appropriate support when the belt 3 is running. The tensioning roller 61 is horizontally mounted between two end plates 52. And through the cooperation of the guide rails 62 and the guide shafts 611, it can move freely when the movable roller 2 rotates to maintain the tension of the belt 3. The elastic connecting member 64 reduces the vibration and impact generated during the operation process, ensuring that the belt 3 runs normally as the paper 21 is conveyed.

[0066] See Figures 7 - 9 As shown, the elastic connecting member 64 is provided with a first connecting rod 641, a second connecting rod 642 and a torsion spring 643. One end of the first connecting rod 641 is rotatably connected to the extended end of the guide shaft 611. One end of the second connecting rod 642 is rotatably connected to the connecting shaft 63. The other end of the first connecting rod 641 and the other end of the second connecting rod 642 are rotatably connected. The torsion spring 643 is fixedly connected between the second connecting rod 642 and the shaft seat 4 and the torsion spring 643 is sleeved on the connecting shaft 63.

[0067] The torsion spring 643 provides elasticity, enabling the tensioning roller 61 to indirectly press against the belt 3 through the cooperation of the first connecting rod 641 and the second connecting rod 642, maintaining the tensioning force of the tensioning roller 61 on the belt 3, thereby ensuring the fit between the belt 3 and the movable roller 2.

[0068] See Figure 10 and Figure 11 As shown, a monitoring camera 7 for monitoring the contact situation between the belt 3 and the paper 21 is provided on the side of the fixed roller 1 facing the belt 3.

[0069] Through the monitoring camera 7, the operator can observe the contact situation between the belt 3 and the paper 21 in real time, thereby promptly discovering any potential problems, such as poor friction between the belt 3 and the paper 21 or the situation where the position of the paper 21 is incorrect and there is a gap with the belt 3, etc. This helps to improve the drying effect of the paper 21, enables the operator to more conveniently monitor and maintain the normal operation of the production line. Through the detection camera, the pressing of each expansion film 51 against the belt 3 can be independently controlled, ensuring the close fit between the paper 21 and the belt 3 and maintaining the uniform heating effect of the paper 21.

[0070] Through the contact between the belt 3 and the paper 21, the heat conduction mechanism 5 indirectly transfers heat to the paper 21 through the belt 3, ensuring uniform heating and heat transfer of the paper 21 during the drying process. The flexible structure of the belt 3 better adapts to the surface of the paper 21, enabling the paper 21 to fit more closely when in contact with the belt 3, reducing possible wrinkles and creases, helping to improve the flatness and quality of the paper 21, enhancing the effect of the drying process, and ensuring the quality of the corrugated medium during drying and forming.

[0071] The above embodiments merely represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. An improved forming production process for recycling corrugated medium from waste paper, characterized in that, The method includes the following steps: Shredding step: The recycled waste paper is cut into thin strips by a strip cutting machine to obtain strip-shaped waste paper; Pulping step: The strip-shaped waste paper is put into a pulping barrel, recycled water is injected into the pulping barrel, and the strip-shaped waste paper is broken into a pulp-like substance. The pulp in the pulping barrel is diverted to obtain waste paper pulp; Impurity removal step: The waste paper pulp is sequentially conveyed to various slag removal devices and undergoes multiple slag removal treatments to obtain primary pulp; Grinding step: The primary pulp is conveyed to a grinding device for grinding; Concentration step: The refined ground pulp is collected. First, the refined ground pulp is sequentially screened through various screening devices to obtain pure refined ground pulp; Stock preparation step: The pure refined ground pulp is conveyed to a stock preparation station for stock preparation to obtain papermaking pulp; Forming step: The papermaking pulp is conveyed to the wire section forming station of a paper forming production line, formed through the wire section, and conveyed forward through the wire section to obtain a wet pulp layer; Drying step: The wet pulp layer is conveyed to a drying device, and the drying device dries it to obtain corrugated medium; Reeling step: The corrugated medium is wound into a reel; Among them, in the drying step, the drying device includes a fixed roller (1), a movable roller (2), and a belt (3); There are multiple movable rollers (2), and all the movable rollers (2) are circumferentially distributed on the surface of the fixed roller (1). The axial direction of the movable roller (2) is parallel to the axial direction of the fixed roller (1); A groove (11) larger than the diameter of the movable roller (2) is formed at the edge of the fixed roller (1). The movable roller (2) is coaxially and rotatably arranged in the groove (11), and a shaft seat (4) for the movable roller (2) to be rotatably connected is provided on the fixed roller (1); The belt (3) is sleeved on all the movable rollers (2). When the paper (21) is being wound, the paper (21) is in a state of adhering to the surface of the belt (3) and driving the belt (3) to run; A heat conduction mechanism (5) is provided between every two adjacent movable rollers (2); When the paper (21) is being conveyed, the fixed roller (1) is in a stationary state, the movable roller (2) is in a rotating state. During the winding process of the paper (21), it adheres to the surface of the belt (3) to drive the belt (3) to run. The belt (3) moves around all the movable rollers (2), and the uniform heating and heat transfer of the paper (21) during the drying process are ensured by the driving of the heat conduction mechanism (5) and the belt (3); The heat conduction mechanism (5) is provided with an expansion film (51) and end plates (52); The expansion film (51) is arranged between two movable rollers (2). The surface of the expansion film (51) is in contact with the inner side of the belt (3). When the expansion film (51) expands, the belt (3) is in a lifted state and fills the gap between the paper (21) and the belt (3); There is a pair of end plates (52). The pair of end plates (52) are symmetrically arranged on both sides of the fixed roller (1) with the middle cross-section perpendicular to the axis direction of the fixed roller (1) as the symmetry plane. The end plates (52) are fixedly connected to the shaft seat (4). The expansion film (51) is fixedly connected between the two end plates (52). An air inlet (521) is formed on one end plate (52), and an air outlet (522) is formed on the other end plate (52); The expansion film (51) has a hollow structure with both ends penetrating. The inner side of the end plate (52) has a limiting edge (523) around its edge. The end edge of the expansion film (51) is fixedly connected to the limiting edge (523). A steam cavity is hermetically formed between the pair of end plates (52) and the expansion film (51).

2. An improved molding process for producing corrugated core paper from recycled waste paper according to claim 1, characterized in that, The fixed roller (1) has a hollow air cavity (12). An air inlet (13) is provided at the axial center position of the fixed roller (1). On the surface of the fixed roller (1), an air outlet (14) communicating with the hollow air cavity (12) is provided on one side corresponding to each of the air inflation ports (521) provided on each end plate (52). A gas guide pipe (53) is provided in communication between each air outlet (14) and the corresponding air inflation port (521).

3. An improved forming process for producing corrugated core paper from recycled waste paper according to claim 2, characterized in that, On each end plate (52) provided with the air inflation port (521) and each end plate (52) provided with the air deflation port (522), an electric control valve (5211) for controlling the opening and closing of the air inflation port (521) and the air deflation port (522) is respectively fixedly provided.

4. An improved forming process for producing corrugated medium paper from recycled waste paper according to claim 1, characterized in that, A tensioning mechanism (6) in contact with the belt (3) is provided at the edge of each movable roller (2). The tensioning mechanism (6) is provided with a tensioning roller (61). The tensioning roller (61) is horizontally mounted between the two end plates (52). The tensioning roller (61) is located outside the belt (3) and close to the position of the movable roller (2). The axial direction of the tensioning roller (61) is parallel to the axial direction of the movable roller (2). Guide rails (62) fixedly connected to the corresponding shaft seats (4) are provided on both sides of the fixed roller (1). The two ends of the tensioning roller (61) respectively have guide shafts (611) extending outward through the corresponding guide rails (62). The track direction of the guide rails (62) is parallel to the axial direction of the fixed roller (1). A connecting shaft (63) is also fixedly provided on the shaft seat (4). An elastic connecting member (64) is provided between the connecting shaft (63) and the guide shaft (611).

5. An improved forming process for producing corrugated medium paper from recycled waste paper according to claim 4, characterized in that, The elastic connecting member (64) is provided with a first connecting rod (641), a second connecting rod (642), and a torsion spring (643). One end of the first connecting rod (641) is rotatably connected to the extending end of the guide shaft (611). One end of the second connecting rod (642) is rotatably connected to the connecting shaft (63). The other end of the first connecting rod (641) and the other end of the second connecting rod (642) are rotatably connected. The torsion spring (643) is fixedly connected between the second connecting rod (642) and the shaft seat (4) and the torsion spring (643) is sleeved on the connecting shaft (63).

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