Papermaking drying cylinder
By installing steam devices and flow guide components in the paper drying cylinder, the sufficient circulation of steam and effective utilization of heat energy are achieved, the problem of poor steam circulation is solved, the heat conduction efficiency and equipment stability are improved, and the risk of paper breaking during paper drying is reduced.
Patent Information
- Application Number
- CN202421598376.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-08
AI Technical Summary
It is difficult to effectively circulate steam in existing paper drying cylinders, resulting in low thermal utilization rate and degradation of mechanical properties under high temperature and high pressure, affecting the safety and life of the equipment.
A steam device and a diversion assembly are arranged in the drying cylinder to form a steam flow channel to ensure that the steam circulates fully in the drying cylinder, and guide the steam along the inner wall of the drying body through the jet air chamber and the steam box, and remove condensate water in combination with the diversion cover and the drain pipe to improve heat conduction efficiency and temperature uniformity.
It improves the heat conduction efficiency of steam, ensures the consistency of the drying cylinder temperature, avoids temperature unevenness, enhances equipment stability, reduces paper breakage during paper drying, and improves the stability and continuity of the production line.
Smart Images
Figure CN223061357U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of papermaking equipment, and particularly relates to a papermaking dryer cylinder. Background Art
[0002] In the process of paper production, a papermaking dryer cylinder is required to continuously dry the paper embryo after the pulp is formed. Steam is introduced into the papermaking dryer cylinder, and heat energy is transferred to the paper web through the cast iron shell, so that the moisture in the paper evaporates. In the existing papermaking dryer cylinder, the steam ejected from the steam inlet pipe is difficult to circulate effectively in the papermaking dryer cylinder, resulting in low heat utilization rate. It is necessary to increase the steam temperature to achieve the production purpose. The air pressure in the papermaking dryer cylinder also increases accordingly. Under high temperature and high pressure conditions, the mechanical properties of the dryer cylinder may decline, thus affecting the use safety and service life of the equipment. Content of the Utility Model
[0003] The purpose of the utility model is to provide a papermaking dryer cylinder for the above-mentioned existing technical problems, so that the steam can circulate fully in the dryer cylinder, and the heat conduction effect of the steam on the dryer cylinder is improved.
[0004] In view of this, the utility model provides a papermaking dryer cylinder, which includes a dryer cylinder body. Covers are arranged on both sides of the dryer cylinder. The covers are connected with drive shafts. A steam recovery port is arranged on one side of the cover. It is characterized in that it further includes a steam device. The steam device extends from one side cover into the dryer cylinder body until it is connected to the other side cover. A flow guiding component is installed in the dryer cylinder body. A steam flow channel is formed between the flow guiding component and the dryer cylinder body. The steam device can cooperate with the flow guiding component to enable the steam to circulate fully in the dryer cylinder body.
[0005] In this technical solution, the steam device is arranged in the dryer cylinder body. The steam device introduces steam into the dryer cylinder body and cooperates with the flow guiding component installed in the dryer cylinder body to guide the steam ejected by the steam device to circulate fully in the dryer cylinder body, ensuring that the temperature of the entire dryer cylinder is consistent and avoiding uneven temperature, thereby improving the heat transfer efficiency. The steam circulates smoothly, and the temperature adjustment of the dryer cylinder can respond more quickly to the changes in production requirements.
[0006] In the above technical solution, further, the steam component includes a first intake pipe. The first intake pipe penetrates into the dryer cylinder body from one side cover and is connected to a jet cavity. A jet structure is arranged on the jet cavity. The jet cavity is communicated with a second intake pipe. The second intake pipe extends towards the side away from the jet cavity and is connected to a steam box. The steam box is connected to the cover on the same side. The steam box is used to disperse and eject the steam in the second intake pipe in all directions.
[0007] In this technical solution, the injection air chamber is a hollow structure, connecting the jet structure and the second intake pipe. The second intake pipe extends towards the other side cover plate and its end is connected to the steam box. A two-stage steam inlet structure is formed within the dryer body through the first intake pipe, the jet structure on the injection air chamber, the second intake pipe, and the steam box, which can fully guide the movement of steam within the dryer, causing the steam to move along the inner wall of the drying body and enabling the heat energy to act fully on the inner wall.
[0008] In the above technical solution, further, the steam box includes a box body. A first chamber is arranged within the box body. The first chamber is circumferentially connected to a diversion channel. One end of the diversion channel is connected to the first chamber, and the other end passes through the side wall of the box body. The outer side wall of the box body extends outward to form a flange, and mounting holes are provided on the flange.
[0009] In this technical solution, the steam box is threadedly connected to the same-side cover body, enhancing the stability of the steam device, preventing the entire steam device from vibrating and shaking violently during operation, which would affect the continuity of the steam cycle, cause uneven surface temperature of the dryer, and lead to situations where the paper is prone to local over-drying or under-drying during the drying process, resulting in paper tearing, increasing the paper breakage phenomenon, and reducing the stability and continuity of the production line.
[0010] In the above technical solution, further, the jet structure is a nozzle, which is arranged on the side of the injection air chamber away from the first intake pipe and is circumferentially arranged around the second intake pipe.
[0011] In this technical solution, the nozzle is a prior art, and its specific structure will not be elaborated here. It jets steam towards the steam box side, and in cooperation with the steam box, it can fully guide the movement of steam within the dryer, causing the steam to move along the inner wall of the drying body and enabling the heat energy to act fully on the inner wall.
[0012] In the above technical solution, further, the diversion component is a diversion cover, which is a hollow shell body, including a cover body. Conical diversion plates are symmetrically connected to both sides of the cover body, and a liquid discharge channel is provided on the cover body.
[0013] In this technical solution, the diversion cover is a hollow shell body, with openings on both sides for the steam device to pass through. The diversion cover includes a cover body and conical diversion plates symmetrically arranged on both sides. The diversion cover and the interior of the dryer body form a steam flow channel for the steam to pass through, enabling the steam to act evenly and fully on the inner wall of the dryer body.
[0014] In the above technical solution, further, the liquid discharge channel is a strip-shaped groove running through the cover body along the length direction of the cover body, and several strip-shaped grooves are circumferentially arranged on the cover body.
[0015] In this technical solution, a liquid discharge groove is provided to drain the condensed water within the diversion cover, preventing it from affecting the stable operation of the equipment.
[0016] In the above technical solution, further, the steam recovery port is arranged on the cover plate on one side of the first intake pipe, the steam recovery port is arranged around the circumference of the first liquid inlet pipe, the steam recovery port is communicated with the recovery pipe, and the recovery pipe is connected to an external heat exchange device.
[0017] In this technical solution, the steam recovery port is arranged on the cover plate on one side of the first intake pipe. Together with the flow guide cover and the steam device, the steam can be fully recovered. Moreover, the injection air chamber can block the steam from flowing back for repeated circulation, helping the steam to leave the dryer body from the steam recovery port and enter the external heat exchange device to recover the waste heat of the steam and improve energy utilization.
[0018] In the above technical solution, further, a drain pipe is further included. The drain pipe penetrates into the dryer body from one side cover plate and extends towards the inner wall of the dryer body through a drain groove. The drain pipe is used to drain the condensed water generated in the dryer body.
[0019] In this technical solution, the drain pipe is provided to prevent the condensed water from depositing on the inner wall of the dryer to form a water film, which affects heat conduction. The drain pipe is a siphon pipe, and the distance between the drain pipe and the inner wall of the dryer body is 1 cm - 2 cm to pump out the condensed water from the dryer body.
[0020] In the above technical solution, further, fixing columns are connected to the outer wall of the flow guide cover. The fixing columns connect the flow guide cover and the inner wall of the dryer, and the fixing columns are arranged around the circumference of the outer wall of the cover.
[0021] 1. The steam device is arranged in the dryer body. The steam device introduces steam into the dryer body. Together with the flow guide assembly installed in the dryer body, it guides the steam ejected by the steam device to achieve full circulation in the dryer body, ensuring that the temperature of the entire dryer is consistent, avoiding uneven temperature, thereby improving the efficiency of heat transfer. The steam circulation is smooth, and the temperature adjustment of the dryer can respond more quickly to the changes in production requirements;
[0022] 2. A two-stage steam inlet structure is formed in the dryer body through the first intake pipe, the jet structure on the injection air chamber, the second intake pipe, and the steam box, which can fully guide the movement of steam in the dryer, making the steam move along the inner wall of the drying body and fully applying the heat energy to the inner wall;
[0023] 3. The steam box is threadedly connected to the same-side cover body, enhancing the stability of the steam device, preventing the entire steam device from vibrating and shaking violently during operation, affecting the continuity of steam circulation, and making the surface temperature of the dryer uneven;
[0024] 4. The flow guide cover is a hollow shell with openings on both sides for the steam device to pass through. The flow guide cover includes a cover body and tapered flow guide plates symmetrically arranged on both sides. The flow guide cover and the inside of the dryer body form a steam flow channel for steam to pass through, enabling the steam to act on the inner wall of the dryer body evenly and fully. Description of the Drawings
[0025] Figure 1 is a partial cross-sectional view of the present utility model;
[0026] Figure 2 is a schematic diagram of the cross-sectional plane structure of the present utility model;
[0027] Figure 3 is a schematic diagram of the structure of the steam box;
[0028] Figure 4 is a cross-sectional view of the steam box.
[0029] The markings in the figure are shown as:
[0030] 1. Dryer body; 2. Cover plate; 3. Drive shaft; 4. Steam recovery port; 5. Steam device; 6. Flow guiding assembly; 7. Steam flow channel; 8. First intake pipe; 9. Injection air chamber; 10. Second intake pipe; 11. Steam box; 12. Box body; 13. First chamber; 14. Shunt channel; 15. Flange; 16. Mounting hole; 17. Flow guiding cover; 18. Cover body; 19. Conical flow guiding plate; 20. Drainage channel; 21. Recovery pipe; 22. Drainage pipe; 23. Fixed column; 24. Jet structure. Specific embodiments
[0031] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.
[0032] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0033] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.
[0034] It should be noted that in the description of this application, the orientation or positional relationships indicated by the orientation terms such as "front, back, top, bottom, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of this application; the terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.
[0035] It should be noted that in this application, the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods can be performed in an order different from that described, and various steps can be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.
[0036] Embodiment 1:
[0037] Such as Figures 1-4, as shown, this embodiment provides a paper-making drying cylinder, including a drying cylinder body 1, with cover plates 2 arranged on both sides of the drying cylinder. The cover plates 2 are connected to a driving shaft 3. A steam recovery port 4 is arranged on one side of the cover plate 2. It is characterized in that it further includes a steam device 5. The steam device 5 enters the drying cylinder body 1 from one side cover plate 2 and extends until it is connected to the other side cover plate 2. A diversion component 6 is installed in the drying cylinder body 1. A steam flow channel 7 is formed between the diversion component 6 and the drying cylinder body 1. The steam device 5 can cooperate with the diversion component 6 to enable the steam to achieve full circulation in the drying cylinder body 1. The steam device 5 is arranged in the drying cylinder body 1. The steam device 5 injects steam into the drying cylinder body 1 and, in cooperation with the diversion component 6 installed in the drying cylinder body 1, guides the steam ejected by the steam device 5 to achieve full circulation in the drying cylinder body 1, ensuring that the temperature of the entire drying cylinder is consistent, avoiding uneven temperature, thereby improving the efficiency of heat transfer. The steam circulates smoothly, and the temperature adjustment of the drying cylinder can respond more quickly to changes in production requirements.
[0038] As Figures 1-4 shown, the steam component includes a first intake pipe 8. The first intake pipe 8 penetrates into the drying cylinder body 1 from one side cover plate 2 and is connected to a jet cavity 9. A jet structure 24 is arranged on the jet cavity 9. The jet cavity 9 is communicated with a second intake pipe 10. The second intake pipe 10 extends towards the side away from the jet cavity 9 and is connected to a steam box 11. The steam box 11 is connected to the same-side cover plate 2. The steam box 11 is used to disperse and eject the steam in the second intake pipe 10 in all directions. The jet cavity 9 is a hollow structure, communicating the jet structure 24 and the second intake pipe 10. The second intake pipe 10 extends towards the other side cover plate 2 and its end is connected to the steam box 11. A two-stage steam entry structure is formed in the drying cylinder main body through the first intake pipe 8, the jet structure 24 on the jet cavity 9, the second intake pipe 10, and the steam box 11, which can fully guide the movement of the steam in the drying cylinder, enabling the steam to move along the inner wall of the drying cylinder and fully applying the heat energy to the inner wall.
[0039] As Figures 1-4 shown, the steam box 11 includes a box body 12. A first chamber 13 is arranged in the box body 12. The first chamber 13 is circumferentially communicated with a diversion channel 14. One end of the diversion channel 14 is communicated with the first chamber 13, and the other end passes through the side wall of the box body 12. An outward extension flange 15 is formed on the outer side wall of the box body 12, and mounting holes 16 are arranged on the flange 15. The steam box 11 is threadedly connected to the same-side cover body, enhancing the stability of the steam device 5, avoiding violent vibration and shaking of the entire steam device 5 during operation, affecting the continuity of steam circulation, making the surface temperature of the drying cylinder uneven, so that local over-drying or under-drying is likely to occur during the drying process of the paper, resulting in paper tearing, thereby increasing the paper breakage phenomenon and reducing the stability and continuity of the production line.
[0040] The jet structure 24 is a nozzle, which is arranged on the side of the jet gas chamber 9 away from the first intake pipe 8 and is arranged around the circumference of the second intake pipe 10. The jet gas chamber 9 is a hollow shell, connected to the first intake pipe 8 on one side and connected to the second intake pipe 10 and the nozzle on the other side. The nozzle is a prior art, and its specific structure will not be described in detail. The nozzle horizontally jets steam towards the steam box 11, which can fully guide the movement of steam in the drying cylinder in cooperation with the steam box 11, so that the steam moves along the inner wall of the drying body, and the heat energy fully acts on the inner wall.
[0041] As Figure 1 and Figure 2 shown, the flow guide assembly 6 is a flow guide cover 17. The flow guide cover 17 is a hollow shell, including a cover body 18. Conical flow guide plates 19 are symmetrically connected to both sides of the cover body 18, and a liquid discharge channel 20 is arranged on the cover body 18. The flow guide cover 17 is a hollow shell, with openings on both sides for the steam device 5 to pass through. The flow guide cover 17 includes a cover body 18 and conical flow guide plates 19 symmetrically arranged on both sides. The flow guide cover 17 and the inside of the drying cylinder body form a steam flow channel 7 for steam to pass through, so that the steam acts on the inner wall of the drying cylinder body evenly and fully.
[0042] The liquid discharge channel 20 is a strip-shaped groove running through the cover body 18 along the length direction of the cover body 18, and several strip-shaped grooves are arranged around the circumference of the cover body 18. The liquid discharge groove is provided to discharge the condensed water in the flow guide cover 17 to avoid affecting the stable operation of the equipment.
[0043] The steam recovery port 4 is arranged on the cover plate 2 on one side of the first intake pipe 8, and the steam recovery port 4 is arranged around the circumference of the first liquid inlet pipe. The steam recovery port 4 is connected to the recovery pipe 21, and the recovery pipe 21 is connected to an external heat exchange device. The steam recovery port 4 is arranged on the cover plate 2 on one side of the first intake pipe 8. In cooperation with the flow guide cover 17 and the steam device 5, the steam can be fully recovered, and the jet gas chamber 9 can block the steam from flowing back for repeated circulation, helping the steam to leave the drying cylinder body from the steam recovery port 4 and enter the external heat exchange device to recover the waste heat of the steam and improve the energy utilization.
[0044] It also includes a drain pipe 22. The drain pipe 22 penetrates into the drying cylinder body 1 from one side cover plate 2 and extends towards the inner wall of the drying cylinder body through the drain groove. The drain pipe 22 is used to discharge the condensed water generated in the drying cylinder body 1. The drain pipe 22 is provided to avoid the condensed water depositing on the inner wall of the drying cylinder to form a water film, which affects heat conduction. The drain pipe 22 is a siphon pipe, and the drain pipe 22 is 1 cm - 2 cm away from the inner wall of the drying cylinder body to pump out the condensed water from the drying cylinder body.
[0045] Fixed columns 23 are connected to the outer wall of the flow guide cover 17. The fixed columns 23 connect the flow guide cover 17 and the inner wall of the drying cylinder, and the fixed columns 23 are arranged around the circumference of the outer wall of the cover.
[0046] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.
Claims
1. A papermaking dryer, characterized in that, It includes a dryer body (1), with covers (2) arranged on both sides of the dryer. The covers (2) are connected to a drive shaft (3). A steam recovery port (4) is arranged on one side of the cover (2). It is characterized in that it further includes a steam device (5). The steam device (5) enters the dryer body (1) from one side cover (2) and extends until it is connected to the other side cover (2). A flow guiding component (6) is installed in the dryer body (1). A steam flow channel (7) is formed between the flow guiding component (6) and the dryer body (1). The steam device (5) can cooperate with the flow guiding component (6) to enable the steam to achieve full circulation in the dryer body (1). The steam box (11) includes a box body (12). A first chamber (13) is arranged in the box body (12). The first chamber (13) is circumferentially connected to a diversion channel (14). One end of the diversion channel (14) is connected to the first chamber (13), and the other end passes through the side wall of the box body (12). The outer side wall of the box body (12) extends outward to form a flange (15), and mounting holes (16) are arranged on the flange (15).
2. The paper-making drying cylinder according to claim 1, wherein The steam component includes a first intake pipe (8). The first intake pipe (8) penetrates into the dryer body (1) from one side cover (2) and is connected to a jet air chamber (9). A jet structure (24) is arranged on the jet air chamber (9). The jet air chamber (9) is connected to a second intake pipe (10). The second intake pipe (10) extends toward the side away from the jet air chamber (9) and is connected to a steam box (11). The steam box (11) is connected to the cover (2) on the same side. The steam box (11) is used to disperse and jet the steam in the second intake pipe (10) in all directions.
3. The paper-making drying cylinder according to claim 2, wherein, The jet structure (24) is a nozzle, which is arranged on the side of the jet air chamber (9) away from the first intake pipe (8) and is circumferentially arranged around the second intake pipe (10).
4. A paper-making drying cylinder according to claim 1, characterized in that, The flow guiding component (6) is a flow guiding cover (17). The flow guiding cover (17) is a hollow shell, including a cover body (18). Conical flow guiding plates (19) are symmetrically connected to both sides of the cover body (18). A liquid discharge channel (20) is arranged on the cover body (18).
5. A paper-making drying cylinder according to claim 4, characterized in that, The liquid discharge channel (20) is a strip-shaped groove that penetrates the cover body (18) along the length direction of the cover body (18). A plurality of strip-shaped grooves are circumferentially arranged on the cover body (18).
6. The paper-making drying cylinder according to claim 1, characterized in that, The steam recovery port (4) is arranged on the cover (2) on one side of the first intake pipe (8). The steam recovery port (4) is circumferentially arranged around the first liquid inlet pipe. The steam recovery port (4) is connected to a recovery pipe (21), and the recovery pipe (21) is connected to an external heat exchange device.
7. The paper-making drying cylinder according to claim 1, characterized in that, It further includes a drain pipe (22). The drain pipe (22) penetrates into the dryer body (1) from one side cover (2) and extends to the inner wall of the dryer main body through a drain groove. The drain pipe (22) is used to discharge the condensed water generated in the dryer body (1).
8. A papermaking dryer cylinder according to any one of claims 1-7, characterized in that, Fixed columns (23) are connected to the outer wall of the flow guiding cover (17). The fixed columns (23) connect the flow guiding cover (17) and the inner wall of the dryer. The fixed columns (23) are circumferentially arranged around the outer wall of the cover.