Multi-section ventilation grouping transmission type paper drying device

Abstract

The utility model discloses a multi-section steam introducing grouping transmission type paper drying device which comprises a low-pressure drying cylinder set, a medium-pressure drying cylinder set, a high-pressure drying cylinder set, a steam main pipe, a low-pressure steam inlet pipe, a medium-pressure steam inlet pipe and a high-pressure steam inlet pipe. The low-pressure steam inlet pipe, the medium-pressure steam inlet pipe and the high-pressure steam inlet pipe are respectively connected with a first regulating valve, a second regulating valve and a third regulating valve; each of the low-pressure drying cylinder group, the medium-pressure drying cylinder group and the high-pressure drying cylinder group is provided with a plurality of drying cylinders, a motor for driving the drying cylinders to rotate, a plurality of guide rollers and a drying net wound between the drying cylinders and the guide rollers; the steam inlet pressure of the first low-pressure drying cylinder, the steam inlet pressure of the second low-pressure drying cylinder and the steam inlet pressure of the third low-pressure drying cylinder are sequentially increased by controlling the first adjusting valve, adjustment can be conducted according to the humidity change condition of the paper web, and therefore the drying process of the attached paper web can be more conveniently controlled, shrinkage of the paper web is effectively controlled, and the quality of paper products is improved.

Description

Technical Field

[0001] This utility model relates to the field of papermaking, specifically to a multi-stage steam-driven group-transmission paper drying device. Background Technology

[0002] With the rapid development of the paper industry, the demand for paper raw materials is increasing, while the quality of raw materials is gradually deteriorating. In particular, the large fluctuations in paper moisture during pressing and dehydration result in large fluctuations in the moisture content of the paper entering the drying section. During drying, the paper shrinks significantly, making it prone to wrinkles. Furthermore, during the paper forming process, the inconsistent lateral dehydration effect of the dehydration elements leads to inconsistent lateral moisture content in the paper. This also results in inconsistent lateral shrinkage of the paper during drying, which also easily leads to wrinkles and seriously affects the quality of the finished paper. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a multi-stage steam-driven group-driven paper drying device to solve the above-mentioned problems.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a multi-stage steam-driven grouped paper drying device, including a low-pressure drying cylinder group, a medium-pressure drying cylinder group, a high-pressure drying cylinder group, a steam main pipe, a low-pressure steam inlet pipe, a medium-pressure steam inlet pipe, and a high-pressure steam inlet pipe; a first regulating valve, a second regulating valve, and a third regulating valve are respectively connected to the low-pressure steam inlet pipe, the medium-pressure steam inlet pipe, and the high-pressure steam inlet pipe; each of the low-pressure drying cylinder group, the medium-pressure drying cylinder group, and the high-pressure drying cylinder group is provided with a plurality of drying cylinders, a motor for driving the drying cylinders to rotate, a plurality of guide rollers, and a dry wire wound between the drying cylinders and the guide rollers; the low-pressure drying cylinder group includes a first low-pressure drying cylinder, a second low-pressure drying cylinder, and a third low-pressure drying cylinder arranged sequentially along the direction of paper advance, and also includes a first motor for driving the first low-pressure drying cylinder, a second low-pressure drying cylinder, and a third low-pressure drying cylinder arranged sequentially along the direction of paper advance, and further includes a first motor for driving the first low-pressure drying cylinder, a third low-pressure drying cylinder for driving the second low-pressure drying cylinder, and a third low-pressure drying cylinder for driving the third low-pressure drying cylinder. The second low-pressure drying cylinder has a second motor, and the third low-pressure drying cylinder has a third motor for driving the third low-pressure drying cylinder. The first, second, and third low-pressure drying cylinders are each connected to a low-pressure steam inlet pipe, and the steam inlet pressure of the first, second, and third low-pressure drying cylinders increases sequentially by controlling a first regulating valve. The ends of the low-pressure steam inlet pipes are all connected to the main steam pipe. The drying cylinders inside the medium-pressure drying cylinder group are connected to the main steam pipe through the medium-pressure steam inlet pipe, and the steam inlet pressure of the medium-pressure drying cylinder group is greater than that of the third low-pressure drying cylinder through the second regulating valve. The drying cylinders inside the high-pressure steam inlet group are connected to the main steam pipe through the high-pressure steam inlet pipe, and the steam inlet pressure of the high-pressure drying cylinder group is greater than that of the medium-pressure drying cylinder group through the third regulating valve.

[0005] Preferably, the second motor and the third motor drive the second low-pressure drying cylinder and the third low-pressure drying cylinder simultaneously via chain transmission.

[0006] Preferably, the end of the medium-pressure steam inlet pipe is provided with a first branch pipe corresponding to the number of drying cylinders in the medium-pressure steam inlet pipe, and all drying cylinders in the medium-pressure drying cylinder group are connected to the medium-pressure steam inlet pipe through the first branch pipe.

[0007] Preferably, the end of the high-pressure steam inlet pipe is provided with a second branch pipe corresponding to the number of drying cylinders in the high-pressure steam inlet pipe, and all the drying cylinders in the high-pressure steam inlet pipe are connected to the high-pressure steam inlet pipe through the second branch pipe.

[0008] Preferably, the medium-pressure drying cylinder group includes a first medium-pressure drying cylinder, a second medium-pressure drying cylinder, and a driven third medium-pressure drying cylinder, as well as a fourth motor and a fifth motor for driving the first and second medium-pressure drying cylinders to rotate together.

[0009] Preferably, at least two third medium-pressure drying cylinders are provided.

[0010] Preferably, the structure of the high-pressure drying cylinder group is the same as that of the medium-pressure drying cylinder group.

[0011] Preferably, the high-pressure drying cylinder group is provided with several units.

[0012] Preferably, there are several high-pressure steam inlet pipes, and each high-pressure steam inlet pipe is connected to at least two high-pressure drying cylinder groups at its end.

[0013] The main technical advantages of this invention are as follows: The first, second, and third motors enable independent driving and flexible speed adjustment of the first, second, and third low-pressure drying cylinders. This speed adjustment reduces paper web shaking caused by its own weight and deformation due to high humidity, thus reducing wrinkles. Furthermore, the speed difference allows for stretching of the paper web, reducing shrinkage. The first regulating valve controls the sequential increase of the steam inlet pressure of the first, second, and third low-pressure drying cylinders, which can be adjusted according to changes in paper web humidity. This facilitates better control of the drying process and effectively controls paper web shrinkage, improving paper quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the low-pressure drying cylinder assembly.

[0016] The attached diagram is labeled as follows: 1-Low-pressure drying cylinder group, 11-First low-pressure drying cylinder, 12-Second low-pressure drying cylinder, 13-Third low-pressure drying cylinder, 14-First motor, 15-Second motor, 16-Third motor, 17-First regulating valve, 18-Second regulating valve, 19-Third regulating valve, 2-Medium-pressure drying cylinder group, 3-High-pressure drying cylinder group, 4-Steam main pipe, 5-Low-pressure steam inlet pipe, 6-Medium-pressure steam inlet pipe, 61-First branch pipe, 62-First medium-pressure drying cylinder, 63-Second medium-pressure drying cylinder, 64-Third medium-pressure drying cylinder, 65-Fourth motor, 7-High-pressure steam inlet pipe, 71-Second branch pipe. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0018] In this embodiment, it should be understood that the terms "middle," "upper," "lower," "top," "right side," "left end," "above," "back," "center," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0019] Furthermore, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection commonly used in the prior art. Therefore, it will not be described in detail in this embodiment.

[0020] This utility model provides a multi-segment steam-driven group transmission type paper drying device, such as... Figure 1-2 As shown, it includes a low-pressure drying cylinder group 1, a medium-pressure drying cylinder group 2, a high-pressure drying cylinder group 3, a steam main pipe 4, a low-pressure steam inlet pipe 5, a medium-pressure steam inlet pipe 6, and a high-pressure steam inlet pipe 7; a first regulating valve 17, a second regulating valve 18, and a third regulating valve 19 are respectively connected to the low-pressure steam inlet pipe 5, the medium-pressure steam inlet pipe 6, and the high-pressure steam inlet pipe 7; each of the low-pressure drying cylinder group 1, the medium-pressure drying cylinder group 2, and the high-pressure drying cylinder group 3 is provided with several drying cylinders, a motor that drives the drying cylinders to rotate, several guide rollers, and a dry net wrapped between the drying cylinders and the guide rollers.

[0021] The low-pressure drying cylinder group 1 includes a first low-pressure drying cylinder 11, a second low-pressure drying cylinder 12, and a third low-pressure drying cylinder 13 arranged sequentially along the direction of paper advance. It also includes a first motor 14 for driving the first low-pressure drying cylinder 11, a second motor 15 for driving the second low-pressure drying cylinder 12, and a third motor 16 for driving the third low-pressure drying cylinder 13. The first low-pressure drying cylinder 11, the second low-pressure drying cylinder 12, and the third low-pressure drying cylinder 13 are each connected to a low-pressure steam inlet pipe 5. A first regulating valve 17 is used to control the steam inlet pressure of the first low-pressure drying cylinder 11, the second low-pressure drying cylinder 12, and the third low-pressure drying cylinder 13, increasing sequentially. The ends of the low-pressure steam inlet pipes 5 are all connected to the main steam pipe 4. The drying cylinders inside the medium-pressure drying cylinder group 2 are connected to the main steam pipe 4 via a medium-pressure steam inlet pipe 6. A second regulating valve 18 is used to ensure that the steam inlet pressure of the medium-pressure drying cylinder group 2 is greater than that of the third low-pressure drying cylinder 13. Steam inlet pressure; the drying cylinder inside the high-pressure steam inlet group is connected to the steam main pipe 4 through the high-pressure steam inlet pipe 7 and the third regulating valve 19 ensures that the steam inlet pressure of the high-pressure drying cylinder group 3 is greater than that of the medium-pressure drying cylinder group 2; the first motor 14, the second motor 15 and the third motor 16 enable the first low-pressure drying cylinder 11, the second low-pressure drying cylinder and the third low-pressure drying cylinder to be driven independently and the speed can be flexibly adjusted, thereby reducing the shaking caused by the paper web due to the deformation caused by its own weight due to high humidity, thus reducing the wrinkles of the paper web, and can also use the speed difference to stretch the paper web and reduce the shrinkage of the paper web; the steam inlet pressure of the first low-pressure drying cylinder 11, the second low-pressure drying cylinder 12 and the third low-pressure drying cylinder 13 is increased sequentially by controlling the first regulating valve 17, and can be adjusted according to the humidity change of the paper web, so as to make it easier to control the drying process of the paper web and effectively control the shrinkage of the paper web and improve the quality of the paper products.

[0022] Since there is a certain gap between the second low-pressure drying cylinder 12 and the third low-pressure drying cylinder 13, preferably, the second motor 15 and the third motor 16 drive the second low-pressure drying cylinder 12 and the third low-pressure drying cylinder 13 simultaneously through chain drive; thereby enabling the second motor 15 and the third motor 16 to drive the second low-pressure drying cylinder 12 and the third low-pressure drying cylinder 13 simultaneously, so that the first low-pressure drying cylinder 11 and the second low-pressure drying cylinder 12 can run more smoothly and at closer speeds, avoiding paper web wrinkling.

[0023] Preferably, the end of the medium-pressure steam inlet pipe 6 is provided with a first branch pipe 61 corresponding to the number of drying cylinders in the medium-pressure steam inlet pipe 6. All drying cylinders in the medium-pressure drying cylinder group 2 are connected to the medium-pressure steam inlet pipe 6 through the first branch pipe 61, so that the steam pressure of the drying cylinders in the medium-pressure drying cylinder group 2 is consistent. After the paper passes through the low-pressure drying cylinder group 1, the humidity decreases and the dryness increases. Combined with the higher steam pressure of the medium-pressure drying cylinder group 2 than that of the low-pressure drying cylinder group 1, the drying efficiency is improved and paper wrinkling is avoided.

[0024] Preferably, the end of the high-pressure steam inlet pipe 7 is provided with a second branch pipe 71 corresponding to the number of drying cylinders in the high-pressure steam inlet pipe 7, and all the drying cylinders in the high-pressure steam inlet pipe 7 are connected to the high-pressure steam inlet pipe 7 through the second branch pipe 71.

[0025] Preferably, the medium-pressure drying cylinder group 2 includes a first medium-pressure drying cylinder 62, a second medium-pressure drying cylinder 63, and a driven third medium-pressure drying cylinder 64, as well as a fourth motor 65 and a fifth motor 66 for driving the first medium-pressure drying cylinder 62 and the second medium-pressure drying cylinder 63 to rotate together.

[0026] Preferably, at least two third medium-pressure drying cylinders 64 are provided.

[0027] Preferably, the structure of the high-pressure drying cylinder group 3 is the same as that of the medium-pressure drying cylinder group 2.

[0028] Preferably, the high-pressure drying cylinder group 3 is provided in several parts.

[0029] Preferably, there are several high-pressure steam inlet pipes 7, and each high-pressure steam inlet pipe 7 is connected to at least two high-pressure drying cylinder groups 3 at its end.

[0030] The main technical advantages of this invention are as follows: The first, second, and third motors enable independent driving and flexible speed adjustment of the first, second, and third low-pressure drying cylinders. This speed adjustment reduces paper web shaking caused by its own weight and deformation due to high humidity, thus reducing wrinkles. Furthermore, the speed difference allows for stretching of the paper web, reducing shrinkage. The first regulating valve controls the sequential increase of the steam inlet pressure of the first, second, and third low-pressure drying cylinders, which can be adjusted according to changes in paper web humidity. This facilitates better control of the drying process and effectively controls paper web shrinkage, improving paper quality.

[0031] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A multi-stage steam-driven group-transmission paper drying device, characterized in that, The system includes a low-pressure drying cylinder group, a medium-pressure drying cylinder group, a high-pressure drying cylinder group, a main steam pipe, a low-pressure steam inlet pipe, a medium-pressure steam inlet pipe, and a high-pressure steam inlet pipe. A first regulating valve, a second regulating valve, and a third regulating valve are respectively connected to the low-pressure steam inlet pipe, the medium-pressure steam inlet pipe, and the high-pressure steam inlet pipe. Each of the low-pressure, medium-pressure, and high-pressure drying cylinder groups is equipped with several drying cylinders, a motor driving the drying cylinders, several guide rollers, and a drying wire wound between the drying cylinders and the guide rollers. The low-pressure drying cylinder group includes a first low-pressure drying cylinder, a second low-pressure drying cylinder, and a third low-pressure drying cylinder arranged sequentially along the paper's forward direction. It also includes a first motor for driving the first low-pressure drying cylinder, a second motor for driving the second low-pressure drying cylinder, and a third low-pressure drying cylinder for driving the third low-pressure drying cylinder. The third motor of the pressure drying cylinder; the first low-pressure drying cylinder, the second low-pressure drying cylinder, and the third low-pressure drying cylinder are respectively connected to low-pressure steam inlet pipes, and the steam inlet pressure of the first low-pressure drying cylinder, the second low-pressure drying cylinder, and the third low-pressure drying cylinder are sequentially increased by controlling the first regulating valve, and the ends of the low-pressure steam inlet pipes are all connected to the main steam pipe; the drying cylinders inside the medium-pressure drying cylinder group are connected to the main steam pipe through the medium-pressure steam inlet pipe, and the steam inlet pressure of the medium-pressure drying cylinder group is greater than that of the third low-pressure drying cylinder through the second regulating valve; the drying cylinders inside the high-pressure steam inlet group are connected to the main steam pipe through the high-pressure steam inlet pipe, and the steam inlet pressure of the high-pressure drying cylinder group is greater than that of the medium-pressure drying cylinder group through the third regulating valve.

2. A multi-zone through-air group drive paper drying apparatus as defined in claim 1, wherein, The second motor and the third motor drive the second low-pressure drying cylinder and the third low-pressure drying cylinder simultaneously through chain transmission.

3. A multi-zone through-air group drive paper drying apparatus as defined in claim 1, wherein, The end of the medium-pressure steam inlet pipe is provided with a first branch pipe corresponding to the number of drying cylinders in the medium-pressure steam inlet pipe, and all drying cylinders in the medium-pressure drying cylinder group are connected to the medium-pressure steam inlet pipe through the first branch pipe.

4. A multi-zone through-air group drive paper drying apparatus as defined in claim 1, wherein, The end of the high-pressure steam inlet pipe is provided with a second branch pipe corresponding to the number of drying cylinders in the high-pressure steam inlet pipe, and all the drying cylinders in the high-pressure steam inlet pipe are connected to the high-pressure steam inlet pipe through the second branch pipe.

5. The multi-segment steam-driven group-transmission paper drying device as described in claim 1, characterized in that, The medium-pressure drying cylinder group includes a first medium-pressure drying cylinder, a second medium-pressure drying cylinder, and a driven third medium-pressure drying cylinder, as well as a fourth motor and a fifth motor for driving the first and second medium-pressure drying cylinders to rotate together.

6. A multi-zone through-air-blast group drive paper drying apparatus as defined in claim 5, wherein, At least two third medium-pressure drying cylinders are provided.

7. A multi-zone through-air-blast group drive paper drying apparatus as defined in claim 6, wherein, The structure of the high-pressure drying cylinder group is the same as that of the medium-pressure drying cylinder group.

8. A multi-zone through-air group drive paper drying apparatus as defined in claim 1, wherein, The high-pressure drying cylinder group consists of several units.

9. A multi-zone through-air-blast group drive paper drying apparatus as defined in claim 8, wherein, Several high-pressure steam inlet pipes are provided, and each high-pressure steam inlet pipe is connected to at least two high-pressure drying cylinder groups at its end.

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