Low-temperature continuous drying device for paper

Abstract

The utility model provides a low-temperature continuous drying device for paper, and belongs to the technical field of paper drying. Comprising a drying frame; the pretreatment frame is arranged on the drying frame; the plurality of first rollers are movably arranged in the pretreatment frame, and the first rollers are sequentially distributed from left to right; the moisture monitor is arranged on the pretreatment frame; the first air cylinder is arranged on the pretreatment frame; the first press roll is movably arranged in the pretreatment frame through a first U-shaped frame. By arranging the first press roll, the second press roll and the third press roll, paper can be pressed in a segmented mode, through segmented fine control, the moisture gradient of the interior and the surface layer of the paper is effectively reduced, local over-dryness or over-wetness is avoided, the moisture balance of the paper is kept, the paper enters the drying device, and the situation that due to different moisture contents, the paper is dried easily is avoided. The deformation risk is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of paper drying, in particular to a low-temperature continuous drying device for paper. Background Art

[0002] Paper also plays an important role in the fields of industrial packaging and agricultural planting technology. For example, in the packaging process of agricultural products, paper products that meet the standards of strength and quality are needed. Low-temperature continuous drying devices can effectively remove moisture without damaging paper fibers, thereby improving the performance of paper.

[0003] At present, when the existing drying device is in use, the initial moisture content of the paper is inconsistent before entering the drying device, and there are differences in the moisture content in the paper area, so the moisture of the paper cannot be kept balanced when entering the drying device, resulting in the areas with high moisture content requiring longer drying time, while the areas with low moisture content may be dried prematurely or even over-dried, causing local overheating, charring or brittleness of the paper. Therefore, the present application provides a low-temperature continuous drying device for paper to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a low-temperature continuous drying device for paper to solve the problem that the existing paper cannot be pre-treated when entering the drying device to ensure the moisture balance of the paper.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A low-temperature continuous drying device for paper comprises: a drying frame; a pretreatment frame, which is arranged on the drying frame; a plurality of first rollers, which are movably arranged in the pretreatment frame, and the first rollers are sequentially distributed from left to right; a moisture monitor, which is arranged on the pretreatment frame; a first cylinder, which is arranged on the pretreatment frame; a first pressing roller, which is movably arranged in the pretreatment frame through a first U-shaped frame; a second cylinder, which is arranged on the pretreatment frame; a second pressing roller, which is movably arranged in the pretreatment frame through a second U-shaped frame; a third cylinder, which is arranged on the pretreatment frame; a third pressing roller, which is movably arranged in the pretreatment frame through a third U-shaped frame; the first cylinder, the second cylinder and the third cylinder are sequentially distributed from left to right, and are used to control the descending pressure of the pressing roller body respectively; the first pressing roller, the second pressing roller and the third pressing roller are sequentially distributed from left to right, and are used to squeeze the paper.

[0007] It also includes: the output end of the first cylinder extends into the preprocessing frame and is connected to the first U-shaped frame, the output end of the second cylinder extends into the preprocessing frame and is connected to the second U-shaped frame, and the output end of the third cylinder extends into the preprocessing frame and is connected to the third U-shaped frame.

[0008] It also includes: a collecting frame, which is arranged in the preprocessing frame and is located below the first roller; a driving motor, which is arranged on the preprocessing frame, and the output end of the driving motor extends into the preprocessing frame and is connected to the leftmost first roller.

[0009] It also includes: a first drying area, which is arranged in the drying frame; a second drying area, which is arranged in the drying frame; and a third drying area, which is arranged in the drying frame; and the first drying area, the second drying area and the third drying area are arranged from left to right.

[0010] It also includes: three drying plates, which are respectively arranged in the first drying area, the second drying area and the third drying area; and an airflow part, which is arranged on the drying frame.

[0011] The invention also comprises: a plurality of second rollers, which are respectively arranged in the first drying area, the second drying area and the third drying area.

[0012] The airflow part includes: three first U-shaped tubes, which are arranged on the drying frame, and the first U-shaped tubes extend into the drying frame and are connected with the drying plate; a connecting tube, which is connected and arranged on the first U-shaped tube; three second U-shaped tubes, which are connected and arranged on the drying frame; and an external tube, which is connected and arranged on the second U-shaped tube and is used to discharge the gas generated by drying.

[0013] Compared with the prior art, the utility model has at least the following beneficial effects:

[0014] In the above scheme, by setting the first pressing roller, the second pressing roller and the third pressing roller, the paper can be pressed in sections. Through fine control of the sections, the moisture gradient inside and on the surface of the paper can be effectively reduced to avoid local over-drying or over-wetting, maintain the moisture balance of the paper, and enter the drying device to avoid the risk of deformation due to different moisture content. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a low-temperature continuous drying device for paper;

[0017] Figure 2 It is a cross-sectional view of the drying frame structure;

[0018] Figure 3 It is a cross-sectional view of the pre-processing frame structure;

[0019] Figure 4 Schematic diagram of the airflow section structure.

[0020] [Reference Signs]

[0021] 1. Drying frame; 2. Pretreatment frame; 3. First cylinder; 4. Second cylinder; 5. Third cylinder; 6. First pressing roller; 7. First roller; 8. Collecting frame; 9. Second roller; 10. Drying plate; 11. First drying area; 12. Driving motor; 13. Second drying area; 14. Third drying area; 15. Air flow section; 16. Moisture monitor; 17. Second pressing roller; 18. Third pressing roller; 151. First U-shaped tube; 152. Connecting tube; 153. Second U-shaped tube; 154. External tube.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0023] The following is a detailed description of a low-temperature continuous drying device for paper provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, an embodiment of the utility model provides a low-temperature continuous drying device for paper, comprising: a drying frame 1; a pretreatment frame 2, which is arranged on the drying frame 1; a plurality of first rollers 7, which are movably arranged in the pretreatment frame 2, and the first rollers 7 are sequentially distributed from left to right; a moisture monitor 16, which is arranged on the pretreatment frame 2; a first cylinder 3, which is arranged on the pretreatment frame 2; a first pressing roller 6, which is movably arranged in the pretreatment frame 2 through a first U-shaped frame; a second cylinder 4, which is arranged on the pretreatment frame 2; a second pressing roller 17, which is movably arranged in the pretreatment frame 2 through a second U-shaped frame; a third cylinder 5, which is arranged on the pretreatment frame 2; a third pressing roller 18, which is movably arranged in the pretreatment frame 2 through a third U-shaped frame; the first cylinder 3, the second cylinder 4 and the third cylinder 5 are sequentially distributed from left to right, and are used to control the descending pressure of the pressing roller body respectively; the first pressing roller 6, the second pressing roller 17 and the third pressing roller 18 are sequentially distributed from left to right, and are used to squeeze the paper.

[0025] By setting the first cylinder 3, the output end of the first cylinder 3 is fixedly connected to the first pressing roller 6 through the first U-shaped frame, and the first pressing roller 6 is movably arranged in the first U-shaped frame through a bearing (the second pressing roller 17 and the second U-shaped frame, the third pressing roller 18 and the third U-shaped frame are the same), the first cylinder 3 is extended and retracted, driving the first pressing roller 6 to rise and fall, so as to squeeze the paper. The first pressing roller 6 has the largest width and can quickly drain the moisture from the paper. The second pressing roller 17 has a medium width and can increase the contact area of ​​the paper surface through a moderate groove depth, which helps to transfer moisture more evenly from the inside of the paper to the surface; the third pressing roller 18 can adopt a smooth surface and be coated with soft materials such as rubber or polyurethane to apply pressure in a gentler way, reduce physical impact on the paper, and promote the flatness and gloss of the paper surface.

[0026] like Figure 2 and Figure 3 As shown, it also includes: the output end of the first cylinder 3 extends into the preprocessing frame 2 and is connected to the first U-shaped frame, the output end of the second cylinder 4 extends into the preprocessing frame 2 and is connected to the second U-shaped frame, and the output end of the third cylinder 5 extends into the preprocessing frame 2 and is connected to the third U-shaped frame.

[0027] By setting the first cylinder 3, the second cylinder 4 and the third cylinder 5, the descending pressure of the first pressing roller 6, the second pressing roller 17 and the third pressing roller 18 are controlled respectively, and the moisture content of different areas of the paper is processed separately through segmented extrusion.

[0028] like Figure 2 , Figure 3 and Figure 4As shown, it also includes: a collecting frame 8, which is arranged in the preprocessing frame 2 and is located below the first roller 7; a driving motor 12, which is arranged on the preprocessing frame 2, and the output end of the driving motor 12 extends into the preprocessing frame 2 and is connected to the first roller 7 on the far left.

[0029] By setting up a collection frame 8, a filter net is provided on the surface of the collection frame 8 to filter the squeezed water. A drain pipe is provided on the rear side of the collection frame 8, and one side of the drain pipe passes through the pretreatment frame 2 to discharge the treated water.

[0030] like Figure 2 and Figure 3 As shown, it also includes: a first drying area 11, which is arranged in the drying frame 1; a second drying area 13, which is arranged in the drying frame 1; a third drying area 14, which is arranged in the drying frame 1; and the first drying area 11, the second drying area 13 and the third drying area 14 are arranged from left to right.

[0031] By setting up three drying zones, the paper can be dried in sections. A lower drying intensity can be set at the beginning and then gradually increased to allow the parts with higher moisture to have more time to catch up, so as to achieve the effect of balanced evaporation of moisture in each part and reduce the risk of deformation.

[0032] like Figure 2 and Figure 3 As shown, the drying frame 1 further includes: three drying plates 10, which are respectively arranged in the first drying area 11, the second drying area 13 and the third drying area 14; and an airflow unit 15, which is arranged on the drying frame 1. By arranging the airflow unit 15, the gas required for drying and the gas generated during drying can be discharged, and the size of the air outlet holes on each drying plate 10 is different.

[0033] like Figure 2 and Figure 3 As shown, it also includes: a plurality of second rollers 9, which are respectively arranged in the first drying area 11, the second drying area 13 and the third drying area 14. By arranging the second rollers 9, the paper is located on the surface of the second rollers 9, and the second rollers 9 rotate to drive the paper to move.

[0034] like Figure 2 , Figure 3 and Figure 4 As shown, the airflow portion 15 includes: three first U-shaped tubes 151, which are arranged on the drying frame 1, and the first U-shaped tubes 151 extend into the drying frame 1 and are connected to the drying plate 10; a connecting tube 152, which is connected and arranged on the first U-shaped tube 151; three second U-shaped tubes 153, which are connected and arranged on the drying frame 1; and an external tube 154, which is connected and arranged on the second U-shaped tube 153, and is used to exhaust the gas generated by drying.

[0035] By setting up a connecting pipe 152 and a diverter valve on the connecting pipe 152, the gas generated during drying can be discharged in a unified manner to facilitate subsequent energy recovery and utilization. By setting up an external pipe 154, it can be connected to an external pipeline to transport the gas required for drying, so that the temperature and wind speed of the gas transported in each drying area are different, ensuring segmented and precise control of the drying conditions.

[0036] The technical solution provided by the utility model is to start the driving motor 12 by using the external controller to drive the first roller 7 on the far left to rotate, and to start the first cylinder 3, the second cylinder 4 and the third cylinder 5 by using the external controller to move, so that the paper passes through the moisture monitor 16 and enters the pretreatment frame 2, and the first cylinder 3 drives the first pressing roller 6 to descend to perform preliminary squeezing on the paper, and the second cylinder 4 drives the second pressing roller 17 to descend to perform moderate dehydration on the paper, and the third cylinder 5 drives the third pressing roller 18 to descend to perform fine dehydration on the paper; the external air source is connected through the external pipe 154, and then the air is passed through the three second U-shaped pipes 15 3. The gas is transported to the three drying plates 10 respectively; the paper after pretreatment enters the first drying area 11, and is dried at a low intensity by the drying plate 10 on the left. The paper continues to move to the right and enters the second drying area 13, and is dried at a medium intensity by the drying plate 10 in the middle. The paper continues to move to the right and enters the third drying area 14, and is finally dried by the drying plate 10 on the right. After drying, the paper is discharged through the discharge port in the drying frame 1; the gas generated during drying enters the connecting pipe 152 through the first U-shaped pipe 151, and is uniformly discharged through the valve on the connecting pipe 152.

[0037] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A low-temperature continuous drying device for paper, characterized in that: include: Drying frame (1); A pretreatment frame (2) is arranged on the drying frame (1); A plurality of first rollers (7) movably arranged in the pre-processing frame (2), and the first rollers (7) are sequentially distributed from left to right; A moisture monitor (16) is arranged on the pre-processing frame (2); A first cylinder (3) is arranged on the pretreatment frame (2); A first pressing roller (6) is movably arranged in the pretreatment frame (2) via a first U-shaped frame; A second cylinder (4) is arranged on the pretreatment frame (2); A second pressing roller (17) is movably arranged in the pretreatment frame (2) via a second U-shaped frame; A third cylinder (5) is arranged on the pretreatment frame (2); A third pressing roller (18) is movably arranged in the pretreatment frame (2) via a third U-shaped frame; The first cylinder (3), the second cylinder (4) and the third cylinder (5) are arranged in sequence from left to right and are used to respectively control the downward pressure of the pressing roller body; The first pressing roller (6), the second pressing roller (17) and the third pressing roller (18) are arranged in sequence from left to right and are used to perform a pressing process on paper.

2. The low-temperature continuous drying device for paper according to claim 1, characterized in that: Also includes: The output end of the first cylinder (3) extends into the pre-processing frame (2) and is connected to the first U-shaped frame, the output end of the second cylinder (4) extends into the pre-processing frame (2) and is connected to the second U-shaped frame, and the output end of the third cylinder (5) extends into the pre-processing frame (2) and is connected to the third U-shaped frame.

3. The low-temperature continuous drying device for paper according to claim 1, characterized in that: Also includes: A collecting frame (8) is arranged in the pre-processing frame (2) and is located below the first roller (7); A drive motor (12) is arranged on the pre-processing frame (2), and an output end of the drive motor (12) extends into the pre-processing frame (2) and is connected to the first roller (7) on the far left.

4. The low-temperature continuous drying device for paper according to claim 1, characterized in that: Also includes: A first drying area (11), arranged in the drying frame (1); A second drying area (13) is arranged in the drying frame (1); A third drying area (14) is arranged in the drying frame (1); Furthermore, the first drying area (11), the second drying area (13) and the third drying area (14) are arranged from left to right.

5. The low-temperature continuous drying device for paper according to claim 4, characterized in that: Also includes: three drying plates (10), respectively arranged in the first drying area (11), the second drying area (13) and the third drying area (14); The airflow portion (15) is arranged on the drying frame (1).

6. The low-temperature continuous drying device for paper according to claim 4, characterized in that: Also includes: A plurality of second rollers (9) are respectively arranged in the first drying area (11), the second drying area (13) and the third drying area (14).

7. The low-temperature continuous drying device for paper according to claim 5, characterized in that: The airflow portion (15) comprises: Three first U-shaped tubes (151) are arranged on the drying frame (1), and the first U-shaped tubes (151) extend into the drying frame (1) and are in communication with the drying plate (10); A connecting pipe (152) disposed in communication with the first U-shaped pipe (151); Three second U-shaped tubes (153) are connected and arranged on the drying frame (1); An external pipe (154) is arranged in communication with the second U-shaped pipe (153) and is used to discharge gas generated by drying.

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