Pulp drying device

Abstract

The present application relates to the technical field of pulp drying, and in particular to a pulp drying device, including a rotating drum, a squeezing roller is arranged on one side of the rotating drum, a steering roller is arranged on the other side, the outer side of the rotating drum is covered with a heating cover, and the inner side of the rotating drum is also provided with a heating module that fits the inner wall thereof, and the heating module is a detachable splicing structure; a hot air flow recovery structure is arranged above the heating cover, and the hot air flow recovery structure is connected to the inside of the squeezing roller. In this scheme, a plurality of air pipes are arranged on the heating cover on the outer side of the rotating drum, and the hot air flow is transported by the air pipes and enters the squeezing roller under the action of an air pump, so as to heat the squeezing roller, and the preheated squeezing roller preheats the paper while squeezing out water, thereby realizing the recovery of waste heat and accelerating the subsequent drying process.

Description

Technical Field

[0001] The present application relates to the technical field of pulp drying, and in particular to a pulp drying device. Background Art

[0002] When producing paper, pulp raw materials are usually put into water to dissolve and stir to form viscous pulp. After the viscous pulp is spread out, moist paper is formed. Usually, this wet paper will be squeezed out of its internal moisture as much as possible through a pressing roller, and then baked through a drying structure to form the base paper of the paper. After the base paper is wound, it will be sent for subsequent processing.

[0003] In the existing drying device, the water vapor generated during the drying process will flow directly to the outside. At the same time, most of them adopt single-sided drying, which will cause heat loss in vain, resulting in energy waste. At the same time, due to the single-sided drying, the drying distance required will be longer, resulting in an increase in the floor space of the production device. Therefore, in order to solve the above problems, the present application provides a pulp drying device.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In order to solve the problem that the existing drying device has poor treatment of waste heat and that the drying distance required for single-sided drying is long, the present application provides a pulp drying device.

[0006] The present application provides a pulp drying device, comprising a rotating drum, a squeezing roller is arranged on one side of the rotating drum, a steering roller is arranged on the other side, a heating cover is covered on the outer side of the rotating drum, and a heating module is arranged on the inner side of the rotating drum to be attached to the inner wall thereof, and the heating module is a detachable splicing structure;

[0007] A hot air flow recovery structure is arranged above the heating cover, and the hot air flow recovery structure is connected to the inside of the squeezing roller.

[0008] The heating module heats the inner wall of the drum and at the same time, the drum still has thermal energy after drying, so as to cooperate with the squeezing roller connected to the hot air flow recovery structure to realize preliminary preheating during the paper moisture squeezing process, thereby accelerating the drying process and utilizing the residual heat.

[0009] Preferably, the hot air flow recovery structure includes a plurality of groups of air pipes connected to the top of the heating hood, the output ends of the air pipes are all connected to the same collecting pipe, and an air pump for conveying air flow is arranged between the collecting pipe and the extrusion roller.

[0010] Preferably, both ends of the squeezing roller are rotatably connected with a rotating end tube, and the rotating end tube is connected to the output end of the air pump through a pipeline.

[0011] Preferably, the heating modules are of a multi-section structure, and the side surfaces of each heating module are arc-shaped. Card slots and card strips are respectively provided on both sides of the heating modules, and two adjacent heating modules are connected by the card slots and card strips.

[0012] Preferably, mounting frames are welded on both sides of the heating module, a fixed shaft is provided at the inner axis position of the rotating drum, and a bracket rotatably connected to the rotating drum is installed on the fixed shaft, and the mounting frame of the heating module is fixedly connected to the bracket by bolts.

[0013] Preferably, the heating temperature of each heating module increases sequentially from the extrusion roller to the steering roller.

[0014] Preferably, the drum is provided with a receiving groove below the extrusion roller, and scraper 1 and scraper 2 are arranged in sequence on the inner side of the receiving groove. Scraper 1 and scraper 2 are both inclined toward the rotation direction of the drum, and scraper 1 and scraper 2 are both arranged in contact with the outer wall of the drum.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] By setting up several air pipes on the heating cover outside the rotating drum, the hot air flow is transported by the air pipes and enters the squeezing roller under the action of the air pump, so as to heat the squeezing roller. The preheated squeezing roller preheats the paper while squeezing out water, thereby realizing the recovery of waste heat and accelerating the subsequent drying process.

[0017] By arranging a number of detachable and combined heating modules on the inner side of the rotating drum, it is possible to achieve double-sided drying of the paper, and at the same time, the squeezing roller can be preheated in cooperation with the squeezing roller, further accelerating the overall drying progress of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an isometric drawing in Example 1 of the present application;

[0019] Figure 2 It is a rear isometric view in Example 1 of the present application;

[0020] Figure 3 This is a diagram of the internal heating plate in Example 1 of the present application;

[0021] Figure 4 This is the receiving groove diagram in Example 1 of the present application.

[0022] Explanation of the reference numerals: 1. rotating drum; 2. bracket; 3. squeezing roller; 31. rotating end pipe; 4. heating hood; 41. lifting sheet; 5. steering roller; 6. heating module; 61. mounting frame; 62. slot; 63. clamping strip; 7. fixed shaft; 9. air pump; 10. air pipe; 11. collecting pipe; 12. receiving groove; 13. scraper one; 14. scraper two. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 - Figure 4 This application is described in further detail.

[0024] Embodiment 1:

[0025] Reference Figure 1 - Figure 4 A pulp drying device comprises a drum 1, a squeezing roller 3 is arranged on one side of the drum 1, and a steering roller 5 is arranged on the other side. The drum 1, the squeezing roller 3 and the steering roller 5 are all provided with an external driving structure as a power source. Since it is a mature prior art, it is not shown in the drawings. The outer side of the drum 1 is covered with a heating cover 4, and the heating cover 4 is provided with an upward lifting piece 41 on the paper input side. The upward lifting piece 41 faces the side away from the drum 1 to facilitate the entry of paper.

[0026] A heating module 6 is also provided on the inner side of the rotating drum 1 and is in contact with its inner wall. The heating module 6 is a detachable splicing structure. The heating module 6 is a multi-stage structure, and the side view of each heating module 6 is an arc-shaped structure. A card slot 62 and a card strip 63 are respectively provided on both sides of the heating module 6. Two adjacent heating modules 6 are connected by the card slot 62 and the card strip 63. A mounting frame 61 is welded on both sides of the heating module 6. A fixed shaft 7 is provided at the inner axis position of the rotating drum 1, and a bracket 2 rotatably connected to the rotating drum 1 is installed on the fixed shaft 7. The mounting frame 61 of the heating module 6 is fixedly connected to the bracket 2 by bolts. A heat-conducting medium, such as heat-conducting silica gel, is provided on the outer end face of the heating module 6 to ensure that the heat of the heating module 6 can be better transmitted to the rotating drum 1 to heat it. The heating temperature of each heating module 6 increases successively from the extrusion roller 3 to the steering roller 5 side.

[0027] A hot air flow recovery structure is arranged above the heating hood 4, and the hot air flow recovery structure is connected to the inside of the extrusion roller 3. The hot air flow recovery structure includes several groups of air pipes 10 connected to the top of the heating hood 4. The output ends of the air pipes 10 are all connected to the same collecting pipe 11. An air pump 9 for conveying air flow is arranged between the collecting pipe 11 and the extrusion roller 3. The air pipe 10 is connected to the bottom of the heating hood 4 through several short pipes. A heating wire with a continuous S-shaped structure is arranged inside the heating hood 4. The connection position of the short pipe and the heating hood 4 avoids the position of the heating wire. Both ends of the extrusion roller 3 are rotatably connected with a rotating end pipe 31, and the rotating end pipe 31 is connected to the output section of the air pump 9 through a pipeline. The rotating end pipe 31 and the extrusion roller 3 are rotatably sealed, thereby ensuring that the extrusion roller 3 can move synchronously with the rotating drum 1 while the airflow of the heating hood 4 can also enter its interior, thereby heating the roller body.

[0028] The drum 1 is provided with a receiving groove 12 below the squeezing roller 3, and a scraper 13 and a scraper 14 are arranged in sequence on the inner side of the receiving groove 12. The scraper 13 and the scraper 14 are both inclined toward the rotation direction of the drum 1, and the scraper 13 and the scraper 14 are both arranged in close contact with the outer wall of the drum 1. The arrangement of the scraper 13 and the scraper 14 is used to guide the water flowing down from the outer wall of the drum 1 to prevent it from continuing to flow downward and causing pollution to the subsequently dried paper.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pulp drying device, comprising a drum (1), wherein a squeezing roller (3) is arranged on one side of the drum (1), a steering roller (5) is arranged on the other side, and a heating cover (4) is covered on the outer side of the drum (1), characterized in that: The inner side of the rotating drum (1) is also provided with a heating module (6) which is in contact with the inner wall thereof, and the heating module (6) is a detachable splicing structure; A hot air flow recovery structure is arranged above the heating cover (4), and the hot air flow recovery structure is connected to the inside of the squeezing roller (3).

2. A pulp drying device according to claim 1, characterized in that: The hot air flow recovery structure comprises a plurality of groups of air delivery pipes (10) connected to the top of the heating hood (4), the output sections of the air delivery pipes (10) are all connected to the same collecting pipe (11), and an air pump (9) for conveying air flow is arranged between the collecting pipe (11) and the squeezing roller (3).

3. A pulp drying device according to claim 1, characterized in that: Both ends of the squeezing roller (3) are rotatably connected to a rotating end tube (31), and the rotating end tube (31) is connected to the output end of the air pump (9) through a pipeline.

4. A pulp drying device according to claim 3, characterized in that: The heating modules (6) are of a multi-stage structure, and the side view of each heating module (6) is of an arc-shaped structure. A clamping groove (62) and a clamping strip (63) are respectively provided on both sides of the heating module (6), and two adjacent heating modules (6) are clamped together by the clamping groove (62) and the clamping strip (63).

5. A pulp drying device according to claim 1, characterized in that: Mounting frames (61) are welded on both sides of the heating module (6); a fixed shaft (7) is provided at the inner axial position of the rotating drum (1); and a bracket (2) rotatably connected to the rotating drum (1) is mounted on the fixed shaft (7); the mounting frame (61) of the heating module (6) is fixedly connected to the bracket (2) via bolts.

6. A pulp drying device according to claim 5, characterized in that: The heating temperature of each heating module (6) increases sequentially from the squeezing roller (3) to the steering roller (5).

7. A pulp drying device according to claim 1, characterized in that: The rotating drum (1) is provided with a receiving groove (12) below the squeezing roller (3), and a scraper plate 1 (13) and a scraper plate 2 (14) are arranged in sequence on the inner side of the receiving groove (12), and the scraper plate 1 (13) and the scraper plate 2 (14) are both inclined toward the rotation direction of the rotating drum (1), and the scraper plate 1 (13) and the scraper plate 2 (14) are both arranged in close contact with the outer wall of the rotating drum (1).

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