Anti-accumulation pre-drying device

Abstract

The utility model discloses an anti-accumulation pre-drying device, which comprises an anti-accumulation cylinder group, a plurality of first drying cylinders, a plurality of second drying cylinders and a plurality of second drying cylinders, the first upper drying cylinders are arranged at intervals, and a first stripping blowing pipe is arranged behind each first upper drying cylinder. The first lower drying cylinders are sequentially arranged below the gaps of the first upper drying cylinders, the first first lower drying cylinder is arranged below the gap of the third first upper drying cylinder and the fourth first upper drying cylinder, and a first paper injection blowing pipe is arranged behind each first lower drying cylinder; first upper dry net upper guide rollers are arranged in gaps of the multiple first upper dry nets respectively, front paper injection blowpipes are arranged in front of the first upper dry net upper guide rollers and the second upper dry net upper guide rollers, and rear paper injection blowpipes are arranged behind the first upper dry net upper guide rollers and the second upper dry net upper guide rollers, so that paper webs can bypass the first upper dry net upper guide rollers and the second upper dry net upper guide rollers. The utility model has the advantages of avoiding the accumulation of paper lint and stickies, ensuring that the cylinder surface is clean, and reducing broken paper.

Description

Technical Field

[0001] This application relates to the technical field of pre-drying, and specifically relates to an anti-accumulation pre-drying device. Background Art

[0002] Due to the design of the paper types produced by PM10 machine, the basis weight of the paper types has a large span and the paper speed varies greatly. The existing paper guiding operation mode in the drying section is not conducive to the stable operation at low basis weight and high paper speed.

[0003] Currently, in the pre-drying section of the drying section, 6 groups of drying cylinders are used, arranged in a way of 3 groups of single-hung and 3 groups of upper and lower row drying cylinders. However, in the actual production process, the dryness of the paper web is relatively low at the outlet of the first 3 groups of single-hung drying cylinders, generally not meeting the dryness requirement for stable operation in the upper and lower row drying cylinders. Therefore, it is very easy to have paper lint and adhesives accumulate on the first 3 drying cylinders of the 4th group of upper and lower row drying cylinders, resulting in dirty cylinder surface and dirty dryer fabric, and prone to paper breakage, which is not conducive to stable operation. Utility Model Content

[0004] Therefore, an anti-accumulation pre-drying device is needed to solve the problem that paper lint and adhesives are likely to accumulate on some drying cylinders in the pre-drying section of the prior art, which is not conducive to the stable operation of the equipment.

[0005] To achieve the above object, the inventor provides an anti-accumulation pre-drying device, including:

[0006] An anti-accumulation cylinder group, including a number of first upper drying cylinders and a number of first lower drying cylinders; the number of first upper drying cylinders are arranged at intervals, and a first peeling air duct is provided behind each first upper drying cylinder; the number of first lower drying cylinders are sequentially arranged below the gaps of the number of first upper drying cylinders, and the first first lower drying cylinder is arranged below the gap between the third first upper drying cylinder and the fourth first upper drying cylinder, and a first paper guiding air duct is provided behind each first lower drying cylinder; first dry fabric upper guide rollers are respectively arranged in the gaps of the number of first upper drying cylinders, and a front paper guiding air duct is provided in front of the first first dry fabric upper guide roller and the second first dry fabric upper guide roller, and a rear paper guiding air duct is provided behind them, so that the first first dry fabric upper guide roller and the second first dry fabric upper guide roller supply the paper web to bypass.

[0007] In some embodiments, the air outlet direction of the front paper guiding air duct is 45° - 145° in the paper web advancing direction.

[0008] In some embodiments, the air outlet direction of the front paper guiding air duct is 90° in the paper web advancing direction.

[0009] In some embodiments, the air outlet direction of the rear paper guiding air duct is 100° - 145° in the paper web advancing direction.

[0010] In some embodiments, the air outlet direction of the rear paper guiding air duct is 130° in the paper web advancing direction.

[0011] In some embodiments, there are five first upper drying cylinders and three first lower drying cylinders.

[0012] In some embodiments, it further includes:

[0013] An upper and lower row cylinder group, which is arranged behind the anti - accumulation cylinder group and includes several second upper drying cylinders and several second lower drying cylinders; several second upper drying cylinders are arranged at intervals, and a second peeling air duct is provided behind each second upper drying cylinder; several second lower drying cylinders are sequentially arranged below the gaps of several second upper drying cylinders, and a second paper guiding air duct is provided behind each second lower drying cylinder.

[0014] In some embodiments, there are two sets of the upper and lower row cylinder groups, which are arranged in sequence behind the anti - accumulation cylinder group.

[0015] In some embodiments, it further includes:

[0016] A single - hanging cylinder group, which is arranged in front of the anti - accumulation cylinder group and includes several single - hanging drying cylinders and several vacuum drying cylinders; several single - hanging drying cylinders are arranged at intervals, and a third peeling air duct is provided behind each single - hanging drying cylinder; several vacuum drying cylinders are sequentially arranged below the gaps of several single - hanging drying cylinders, and a third paper guiding air duct is provided behind each vacuum drying cylinder.

[0017] In some embodiments, there are three sets of the single - hanging cylinder groups, and the three sets of single - hanging cylinder groups, the anti - accumulation cylinder group, and the upper and lower row cylinder groups are arranged in sequence.

[0018] Different from the prior art, the pre-drying device against accumulation described in the above technical solution is provided with an anti-accumulation cylinder group. The front part of the anti-accumulation cylinder group is a single-row cylinder, and the rear part of the anti-accumulation cylinder group is a double-row cylinder. When the paper web enters the front part of the anti-accumulation cylinder group, since there is a front paper guiding air duct in front of the first and second upper drying cylinder guiding rollers and a rear paper guiding air duct behind them, the paper web will successively bypass the first first upper drying cylinder, the first first upper drying cylinder guiding roller, the second first upper drying cylinder, and the second first upper drying cylinder guiding roller, only performing a single-row bypass of the upper row. Then it enters the rear part of the anti-accumulation cylinder group and successively bypasses the subsequent upper drying cylinder, lower drying cylinder, and upper drying cylinder alternately, performing a double-row bypass of the upper and lower rows. When the paper web with a lower dryness enters the anti-accumulation cylinder group, it does not directly perform a double-row bypass but first performs a single-row bypass. Then paper fluff and adhesives will not accumulate on the first three drying cylinders. After completing the single-row bypass in the anti-accumulation cylinder group, at this time, the dryness of the paper web has been further increased by the front part of the anti-accumulation cylinder group. When it enters the rear part of the anti-accumulation cylinder group to perform a double-row bypass, there will no longer be a problem of paper fluff and adhesive accumulation. Therefore, using the pre-drying device against accumulation can ensure that the cylinder surface and the drying fabric are clean, without paper fluff and adhesive accumulation, thereby reducing paper breakage. The paper web can run stably, and this device can be improved based on the existing device, is easy to manufacture, consumes less materials, and has a low cost.

[0019] The above description of the utility model content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then can be implemented according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features, and advantages of this application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the specific implementation manners and other related contents of this application, and should not be considered as a limitation to this application.

[0021] In the accompanying drawings of the specification:

[0022] Figure 1 It is a side view of the upper and lower row drying cylinders of the fourth group in the existing pre-drying section described in the specific implementation manner;

[0023] Figure 2 It is a side view of the anti-accumulation cylinder group of the pre-drying device against accumulation described in the specific implementation manner;

[0024] Figure 3 It is a partial enlarged view of the anti-accumulation cylinder group of the pre-drying device against accumulation described in the specific implementation manner;

[0025] Figure 4It is a diagram of the paper web running mode of the anti-piling cylinder group of the anti-piling pre-drying device described in the specific implementation manner;

[0026] Figure 5 It is a schematic diagram of the installation position of the anti-piling pre-drying device described in the specific implementation manner;

[0027] The description of the reference numerals involved in the above-mentioned respective drawings is as follows:

[0028] 1. Anti-piling cylinder group;

[0029] 10. First upper drying cylinder;

[0030] 11. First lower drying cylinder;

[0031] 12. First peeling air duct;

[0032] 13. First paper guiding air duct;

[0033] 14. First upper dry net guiding roller;

[0034] 15. Front paper guiding air duct;

[0035] 16. Rear paper guiding air duct;

[0036] 17. First lower dry net guiding roller;

[0037] 2. Upper and lower row cylinder group;

[0038] 3. Single hanging cylinder group;

[0039] 4. Paper web;

[0040] 5. Dry net;

[0041] 6. Drying cylinder. Specific implementation manner

[0042] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects, etc. of this application, the following is described in detail in combination with the listed specific examples and with reference to the drawings. The examples described in this article are only used to more clearly illustrate the technical solutions of this application, so they are only used as examples and cannot be used to limit the protection scope of this application.

[0043] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of this application. The word "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form the corresponding implementable technical solution.

[0044] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0045] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0046] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary, or order relationship between these entities or operations.

[0047] Without further limitation, in this application, the terms "include", "comprise", "have" or other similar expressions used in the statement are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be additional elements in the process, method or product including the said elements, so that the process, method or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to this process, method or product.

[0048] The same as the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the present number; expressions such as "above", "below", "within" are understood to include the present number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise specifically defined.

[0049] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawings, and is only for the convenience of describing the specific embodiments of this application or for the convenience of the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0050] Unless otherwise clearly specified or defined, in the description of the embodiments of the present application, terms such as "installation", "connection", "linkage", "fixation", "setting", etc. shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0051] Due to the design reasons of the paper grades produced by PM10 machine, the basis weight span of the paper grades is large and the paper machine speed changes greatly. The existing paper guiding operation mode of the dryer section is not conducive to the stable operation at low basis weight and high paper machine speed.

[0052] Currently, in the pre-dryer section of the dryer section, 6 groups of dryer cylinders are used, with an arrangement of 3 groups of single-hung and 3 groups of upper and lower row dryer cylinders. However, in the actual production process, the dryness of the paper web 4 is relatively low when it exits the first 3 groups of single-hung dryer cylinders, and generally fails to meet the dryness requirements for stable operation in the upper and lower row dryer cylinders. Please refer to Figure 1 Therefore, it is very easy for paper lint and adhesives to accumulate on the first 3 dryer cylinders 6 of the 4th group of upper and lower row dryer cylinders, resulting in dirty cylinder surfaces and dirty dryer fabrics, and prone to paper breaks, which is not conducive to stable operation.

[0053] The present utility model provides an anti-accumulation pre-drying device, which is a device used in the pre-dryer section of the paper web dryer section for drying the paper web, especially can avoid the accumulation of paper lint and adhesives, ensure the cleanliness of the cylinder surface and the dryer fabric, reduce paper breaks, and ensure the stable operation of the paper web.

[0054] Please refer to Figure 2 and Figure 3 In a specific embodiment, the anti-accumulation pre-drying device includes an anti-accumulation cylinder group 1, and the anti-accumulation cylinder group 1 includes a plurality of first upper dryer cylinders 10 and a plurality of first lower dryer cylinders 11; the plurality of first upper dryer cylinders 10 are arranged at intervals, and a first peeling air duct 12 is provided behind each first upper dryer cylinder 10. The first peeling air duct 12 is used to peel the paper web 4 on the first upper dryer cylinder 10 from the first upper dryer cylinder 10 for bypassing to the next step.

[0055] A number of first lower drying cylinders 11 are successively arranged below the respective gaps between a number of first upper drying cylinders 10, and the first first lower drying cylinder 11 (i.e., the first one along the direction in which the paper web 4 enters) is arranged below the gap between the third first upper drying cylinder and the fourth first upper drying cylinder 10 (that is, there is no drying cylinder below the gap between the first first upper drying cylinder 10 and the second first upper drying cylinder 10, and below the gap between the second first upper drying cylinder 10 and the third first upper drying cylinder 10), and a first paper guiding air blowing pipe 13 is arranged behind each first lower drying cylinder 11, and the first paper guiding air blowing pipe 13 is used to guide the paper web 4 to bypass the first lower drying cylinder 11.

[0056] First dry web upper guide rollers 14 are respectively arranged in the respective gaps between a number of first upper drying cylinders. The first dry web upper guide rollers 14 are mainly used for the dry web 5 to bypass. A front paper guiding air blowing pipe 15 is arranged in front of the first first dry web upper guide roller 14 and the second first dry web upper guide roller 14, and a rear paper guiding air blowing pipe 16 is arranged behind them. The front paper guiding air blowing pipe 15 is used to introduce the paper web 4 from the previous first upper drying cylinder 10 to the first dry web upper guide roller 14, so that the paper web 4 bypasses to the first dry web upper guide roller 14. The rear paper guiding air blowing pipe 16 is used to introduce the paper web 4 from the first dry web upper guide roller 14 to the next first upper drying cylinder 10, so that the paper web 4 bypasses to the next first upper drying cylinder 10. The first first dry web upper guide roller 14 and the second first dry web upper guide roller 14 are both provided with a front paper guiding air blowing pipe 15 and a rear paper guiding air blowing pipe 16, so that both the first first dry web upper guide roller 14 and the second first dry web upper guide roller 14 can allow the paper web 4 to bypass.

[0057] Since the anti - accumulation pre - drying device is provided with an anti - accumulation cylinder group 1, please refer to Figure 4, the front part of the anti - accumulation cylinder group 1 is a single - row cylinder, and the rear part of the anti - accumulation cylinder group 1 is a double - row cylinder. When the paper web 4 enters the front part of the anti - accumulation cylinder group 1, since there is a front paper - guiding air - blowing pipe 15 in front of the first and second first dry - web upper rollers 14 and a rear paper - guiding air - blowing pipe 16 behind them, the paper web 4 will successively bypass around the first first upper drying cylinder 10, the first first dry - web upper roller 14, the second first upper drying cylinder 10, and the second first dry - web upper roller 14, only making a single - row bypass in the upper row. Then it enters the rear part of the anti - accumulation cylinder group 1 and successively bypasses alternately around the subsequent first upper drying cylinder 10, the first lower drying cylinder 11, and the first upper drying cylinder 10, making a double - row bypass in the upper and lower rows. When the paper web 4 with a lower dryness enters the anti - accumulation cylinder group 1, it does not directly make a double - row bypass but first makes a single - row bypass. In this way, paper fluff and adhesives will not accumulate on the first three drying cylinders. After completing the single - row bypass in the anti - accumulation cylinder group 1, at this time, the dryness of the paper web 4 has been further increased by the front part of the anti - accumulation cylinder group 1. When it enters the rear part of the anti - accumulation cylinder group 1 to make a double - row bypass, there will no longer be a problem of paper fluff and adhesive accumulation. Therefore, using the anti - accumulation pre - drying device can ensure that the cylinder surface and the dry web are clean, without paper fluff and adhesive accumulation, thereby reducing the paper breakage situation. Through actual use, it can be found that the average number of paper breaks is reduced by more than 2 times per month. The paper web 4 can operate stably, and this device can be improved based on the existing device, is easy to manufacture, has less consumables, and low cost.

[0058] In a further embodiment, each gap of several first lower drying processes can also be respectively provided with a first dry - web lower roller 17, which is also used for the dry web to bypass.

[0059] In some embodiments, the air - outlet direction of the front paper - guiding air - blowing pipe 15 is 45° - 145° of the advancing direction of the paper web 4.

[0060] In a preferred embodiment, the air - outlet direction of the front paper - guiding air - blowing pipe 15 is 90° of the advancing direction of the paper web 4, that is, the air - pipe direction of the front paper - guiding air - blowing pipe 15 is 90° of the advancing direction of the paper web 4. In this way, the paper web 4 can be more accurately and effectively guided from the previous first upper drying cylinder 10 to the first dry - web upper roller 14.

[0061] In some embodiments, the air - outlet direction of the rear paper - guiding air - blowing pipe 16 is 100° - 145° of the advancing direction of the paper web 4.

[0062] In a preferred embodiment, the air - outlet direction of the rear paper - guiding air - blowing pipe 16 is 130° of the advancing direction of the paper web 4, that is, the air - pipe direction of the rear paper - guiding air - blowing pipe 16 is 130° of the advancing direction of the paper web 4. In this way, the paper web 4 can be more accurately and effectively guided from the first dry - web upper roller 14 to the next first upper drying cylinder 10.

[0063] In some embodiments, there are five first upper drying cylinders 10 and three first lower drying cylinders 11.

[0064] In some embodiments, it further includes an upper and lower row cylinder group 2, which is arranged behind the anti - accumulation cylinder group 1. The upper and lower row cylinder group 2 includes a plurality of second upper drying cylinders and a plurality of second lower drying cylinders; the plurality of second upper drying cylinders are arranged at intervals, and a second peeling air duct is provided behind each second upper drying cylinder, and the second peeling air duct is used to peel the paper web 4 from the second upper drying cylinder; the plurality of second lower drying cylinders are sequentially arranged below the gaps between the plurality of second upper drying cylinders. Specifically, the first second lower drying cylinder is arranged below the gap between the first second upper drying cylinder and the second second upper drying cylinder, and a second paper guiding air duct is provided behind each second lower drying cylinder. The second paper guiding air duct behind the second lower drying cylinder is used to guide the paper web 4 from this second lower drying cylinder to walk around the next second upper drying cylinder.

[0065] In some embodiments, second dry - net upper guide rollers are respectively arranged at the gaps between the plurality of second upper drying cylinders for the dry net to bypass.

[0066] In some embodiments, second dry - net lower guide rollers are respectively arranged at the gaps between the plurality of second lower drying cylinders for the dry net to bypass.

[0067] In some embodiments, there are two sets of the upper and lower row cylinder groups 2, which are arranged in sequence behind the anti - accumulation cylinder group 1.

[0068] In some embodiments, it further includes a single - hanging cylinder group 3, which is arranged in front of the anti - accumulation cylinder group 1. The single - hanging cylinder group 3 includes a plurality of single - hanging drying cylinders and a plurality of vacuum drying cylinders; the plurality of single - hanging drying cylinders are arranged at intervals, and a third peeling air duct is provided behind each single - hanging drying cylinder, and the third peeling air duct is used to peel the paper web 4 from the single - hanging drying cylinder; the plurality of vacuum drying cylinders are sequentially arranged below the gaps between the plurality of single - hanging drying cylinders, and a third paper guiding air duct is provided behind each vacuum drying cylinder. The third paper guiding air duct behind the vacuum drying cylinder is used to guide the paper web 4 from this vacuum drying cylinder to walk around the next single - hanging drying cylinder.

[0069] In some embodiments, third dry - net upper guide rollers are respectively arranged at the gaps between the plurality of single - hanging drying cylinders for the dry net to bypass.

[0070] In some embodiments, third dry - net lower guide rollers are respectively arranged at the gaps between the plurality of vacuum drying cylinders for the dry net to bypass.

[0071] Please refer to Figure 5 , in some embodiments, there are three sets of the single - hanging cylinder groups 3, and the three sets of single - hanging cylinder groups 3, the anti - accumulation cylinder group 1, and the upper and lower row cylinder group 2 are arranged in sequence.

[0072] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions generated by equivalent structure or equivalent process substitution or modification made based on the essential concept of this application and using the content recorded in the text and drawings of the specification of this application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of this application.

Claims

1. An anti-deposit front drying device, characterized in that: include: The anti-stacking cylinder group includes a plurality of first upper drying cylinders and a plurality of first lower drying cylinders; the plurality of first upper drying cylinders are arranged at intervals, and a first peeling blow pipe is provided at the rear of each first upper drying cylinder; the plurality of first lower drying cylinders are arranged in sequence below each gap of the plurality of first upper drying cylinders, and the first first lower drying cylinder is arranged below the gap of the third first upper drying cylinder and the fourth first upper drying cylinder, and a first paper guiding blow pipe is provided at the rear of each first lower drying cylinder; first dry web guide rollers are provided at each gap of the plurality of first upper drying cylinders, and a front paper guiding blow pipe is provided in front of the first first dry web guide roller and the second first dry web guide roller, and a rear paper guiding blow pipe is provided at the rear, so that the paper web of the first first dry web guide roller and the second first dry web guide roller can bypass.

2. The anti-deposit drying device according to claim 1, characterized in that: The air outlet direction of the front paper blowing pipe is 45°-145° to the advancing direction of the paper web.

3. The anti-deposit drying device according to claim 2, characterized in that: The air outlet direction of the front paper blowing pipe is 90° to the advancing direction of the paper web.

4. The anti-deposit pre-drying device according to claim 1, characterized in that: The air outlet direction of the rear paper feeding blowing pipe is 100°-145° to the advancing direction of the paper web.

5. The anti-deposit drying device according to claim 4, characterized in that: The air outlet direction of the rear paper feeding blowing pipe is 130° to the advancing direction of the paper web.

6. The anti-deposit pre-drying device according to claim 1, characterized in that: There are five first upper drying cylinders and three first lower drying cylinders.

7. The anti-deposit pre-drying device according to claim 1, characterized in that: Also includes: The upper and lower cylinder groups are arranged behind the anti-accumulation cylinder group, and include a plurality of second upper drying cylinders and a plurality of second lower drying cylinders; the plurality of second upper drying cylinders are arranged at intervals, and a second stripping blow pipe is provided behind each second upper drying cylinder; the plurality of second lower drying cylinders are arranged in sequence below each gap of the plurality of second upper drying cylinders, and a second paper guiding blow pipe is provided behind each second lower drying cylinder.

8. The anti-deposit pre-drying device according to claim 7, characterized in that: The upper and lower cylinder groups are provided with two groups, and are arranged in sequence behind the anti-accumulation cylinder group.

9. The anti-deposit pre-drying device according to claim 8, characterized in that: Also includes: A single-hanging cylinder group, which is arranged in front of the anti-deposit cylinder group, includes a plurality of single-hanging drying cylinders and a plurality of vacuum drying cylinders; the plurality of single-hanging drying cylinders are arranged at intervals, and a third stripping blowing pipe is provided at the rear of each single-hanging drying cylinder; the plurality of vacuum drying cylinders are arranged in sequence under each gap of the plurality of single-hanging drying cylinders, and a third paper feeding blowing pipe is provided at the rear of each vacuum drying cylinder.

10. The anti-deposit pre-drying device according to claim 9, characterized in that: The single-hung cylinder group is provided with three groups, and the three groups of single-hung cylinder groups, the anti-accumulation cylinder group, and the upper and lower row cylinder groups are arranged in sequence.

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