Paper machine system

Abstract

The utility model discloses a paper machine system which comprises a paper sheet dewatering assembly, a steam-water processing assembly and a vacuum adsorption box, and the paper sheet dewatering assembly comprises a vacuum transfer box, a first vacuum box, a second vacuum box and a vacuum press roll which are sequentially arranged in the paper running direction. The steam-water treatment assembly comprises a first steam-water separator, a second steam-water separator and a magnetic suspension vacuum pump, the first steam-water separator is connected with a conduction pipeline, the vacuum transfer box, the first vacuum box, the second vacuum box and the vacuum press roll are all connected to the conduction pipeline, the first steam-water separator is connected to the second steam-water separator through a steam conveying pipeline, and the second steam-water separator is connected to the magnetic suspension vacuum pump. And the magnetic suspension vacuum pump is connected to the second steam-water separator. According to the paper machine system, due to the arrangement of the magnetic suspension vacuum pump, energy conversion loss between a compressor and a vacuum pump in traditional pump equipment is avoided, and overall energy conservation of the paper machine system is achieved.

Description

Technical Field

[0001] The utility model relates to the field of paper machine equipment, in particular to a paper machine system. Background Art

[0002] After the wet paper sheet is formed in the paper production process, vacuum dehydration is an important step, which aims to remove moisture from the wet paper sheet, improve the dryness of the paper sheet, and create conditions for the drying of the wet paper sheet. This step is usually carried out between the press section and the drying section of the paper machine. Generally, the vacuum dehydration method is a combination of a vacuum suction box and a vacuum press. Its advantage is that under the combined action of the pressing force and the vacuum suction force, the moisture of the wet paper sheet can be removed more effectively, especially the combination of the vacuum suction box and the vacuum press, which improves the dehydration efficiency and the quality of the paper sheet, and the dehydration efficiency is high. Its disadvantages are complex equipment, high cost, and high energy consumption, because only by maintaining a higher pressure and vacuum degree can the production needs be met. The following two main vacuum equipment are usually used: water ring vacuum pump and turbine blower.

[0003] Water ring vacuum pump: a liquid-sealed vacuum pump suitable for extracting gases containing moisture or particles. Its advantages are its stability and adaptability, and its ability to provide a full range of vacuum capacity. Its disadvantages are relatively low energy efficiency, high power consumption, and the need for a vacuum working fluid circulation system and processing equipment.

[0004] Turbine blower: It is a dry vacuum generating device with relatively high efficiency. It is sensitive to water. If too much water enters, it may damage the equipment. In addition, when the suction flow rate is less than the design value, unstable working conditions may occur. And the energy consumption of turbine blower is high. The energy consumption in the whole production reaches more than 31%, resulting in high energy consumption per unit product, which directly affects the production cost and also affects the market competitiveness of equipment suppliers. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a paper machine system.

[0006] The technical solution adopted by the utility model to solve the technical problem is: constructing a paper machine system, which includes a paper sheet dehydration component, a steam-water treatment component and a vacuum adsorption box;

[0007] The paper sheet dewatering assembly comprises a vacuum transfer box, a first vacuum box, a second vacuum box and a vacuum pressing roller which are arranged in sequence along the running direction of the paper sheet;

[0008] The steam-water treatment assembly includes a first steam-water separator, a second steam-water separator and a magnetic suspension vacuum pump, the first steam-water separator is connected to a conducting pipeline, the vacuum transfer box, the first vacuum box, the second vacuum box and the vacuum pressing roller are all connected to the conducting pipeline;

[0009] The first steam-water separator is connected to the second steam-water separator through a steam pipeline, and the magnetic levitation vacuum pump is connected to the second steam-water separator.

[0010] In some embodiments, the vacuum transfer box is connected to the conducting line through a first shunt line, the first vacuum box and the second vacuum box are connected to the conducting line through a second shunt line, and the vacuum pressing roller is connected to the conducting line through a third shunt line.

[0011] In some embodiments, a first pressure gauge is disposed on the first shunt pipeline, a second pressure gauge is disposed on the second shunt pipeline, and a third pressure gauge is disposed on the third shunt pipeline.

[0012] In some embodiments, the magnetic levitation vacuum pump is connected to a permanent magnet motor.

[0013] In some embodiments, the magnetic levitation vacuum pump is also connected to an exhaust pipeline, and an exhaust control valve is provided on the exhaust pipeline.

[0014] In some embodiments, the paper machine system further comprises an overflow white water tank, the first steam-water separator is connected to the overflow white water tank via a filtrate pipeline, and a first filtrate pump is disposed on the filtrate pipeline.

[0015] In some embodiments, the filtrate pipeline is also connected to a liquid separation pipeline, and a second filtrate pump is provided on the liquid separation pipeline.

[0016] In some embodiments, the paper machine system further includes a liquid level control device, and the liquid level control device is communicatively connected to the first steam-water separator, the first filtrate pump, and the second filtrate pump.

[0017] In some embodiments, the paper machine system further includes a cooling water pipeline and a return pipeline, and both the cooling water pipeline and the return pipeline are connected to the second steam-water separator.

[0018] In some embodiments, the second steam-water separator is further connected to a sealing water pipeline.

[0019] The implementation of the utility model has the following beneficial effects: the paper machine system is provided with a magnetic levitation vacuum pump, which adopts magnetic levitation bearings to realize contactless support of the rotor, avoiding the friction and wear problems of traditional mechanical bearings, and has the characteristics of low energy consumption, low friction, no vibration, no noise, etc., reducing energy loss and improving efficiency. Traditional vacuum pumps need to regularly replace lubricants and maintain parts, while magnetic levitation vacuum pumps basically do not require maintenance due to contactless operation, reducing maintenance costs and work downtime. The magnetic levitation vacuum pump adopts the turbine design principle, similar to a steam turbine, and generates vacuum suction through the rotation of turbine blades, which can achieve high-efficiency conversion, directly converting the mechanical energy input by the compressor into the energy of compressed gas, avoiding the energy conversion loss between the compressor and the vacuum pump in traditional pump equipment, and realizing the overall energy saving of the paper machine system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 is a schematic diagram of the overall structure of a paper machine system in some embodiments of the utility model;

[0022] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0023] Figure 3 yes Figure 1 A magnified schematic diagram of point B in the middle. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0025] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0026] See also Figures 1 to 3 , is a papermaking machine system in some embodiments of the utility model, which includes a paper dehydration component 1, a steam-water treatment component 2 and a vacuum adsorption box 7, the paper dehydration component 1 includes a vacuum transfer box 11, a first vacuum box 12, a second vacuum box 13 and a vacuum pressing roller 14 arranged in sequence along the paper running direction, the steam-water treatment component 2 includes a first steam-water separator 21, a second steam-water separator 22 and a magnetic levitation vacuum pump 23, the first steam-water separator 21 is connected to a conducting pipeline 24, the vacuum transfer box 11, the first vacuum box 12, the second vacuum box 13 and the vacuum pressing roller 14 are all connected to the conducting pipeline 24, the first steam-water separator 21 is connected to the second steam-water separator 22 through a steam transmission pipeline 25, and the magnetic levitation vacuum pump 23 is connected to the second steam-water separator 22.

[0027] Specifically, the vacuum pressing roller mainly functions to finish and dehydrate the paper, so that the paper maintains a certain tension and moisture, so that the paper entering the dryer is not easy to break or crack. The vacuum water absorption box is used to absorb water from the paper. The vacuum absorption box 7 mainly functions to help the pulp to drain and shape better during the papermaking process through negative pressure absorption. After the paper is dried and formed, it guides the paper to enter the next curling section smoothly and guides the paper to curl. The steam-water separator is used to separate gas and moisture.

[0028] In addition, the magnetic levitation vacuum pump 23 adopts magnetic levitation bearings to achieve contactless support of the rotor, avoiding the friction and wear problems of traditional mechanical bearings, and has the characteristics of low energy consumption, low friction, no vibration, no noise, etc., reducing energy loss and improving efficiency. Traditional vacuum pumps need to regularly replace lubricants and maintain parts, while the magnetic levitation vacuum pump 23 basically does not require maintenance due to contactless operation, reducing maintenance costs and work downtime. The magnetic levitation vacuum pump 23 adopts the turbine design principle, similar to a steam turbine, and generates vacuum suction through the rotation of turbine blades, which can achieve high-efficiency conversion, directly converting the mechanical energy input by the compressor into the energy of compressed gas, avoiding the energy conversion loss between the compressor and the vacuum pump in traditional pump equipment. In general, the magnetic levitation vacuum pump 23 has multiple advantages such as high precision, stability, low noise, maintenance-free and environmental protection, especially in terms of energy saving.

[0029] The magnetic levitation vacuum pump 23 is connected to a permanent magnet motor 231 , which has the characteristics of high speed, high efficiency, and high power density, and can adjust the speed and power according to different working conditions to further improve energy utilization efficiency.

[0030] The magnetic levitation vacuum pump 23 is also connected to an exhaust pipeline 232 , which is used to exhaust gas. An exhaust control valve 233 is provided on the exhaust pipeline 232 .

[0031] Furthermore, the vacuum transfer box 11 is connected to the conduction line 24 through the first shunt line 26, the first vacuum box 12 and the second vacuum box 13 are connected to the conduction line 24 through the second shunt line 27, and the vacuum pressing roll 14 is connected to the conduction line 24 through the third shunt line 28. The water absorbed by the vacuum transfer box 11, the first vacuum box 12, and the second vacuum box 13 during the working process enters the first steam-water separator 21 through the above-mentioned shunt line for preliminary treatment.

[0032] The first shunt pipeline 26 is provided with a first pressure gauge 261 , the second shunt pipeline 27 is provided with a second pressure gauge 271 , and the third shunt pipeline 28 is provided with a third pressure gauge 281 . The pressure gauges are used to monitor the pressure values ​​on the respective shunt pipelines.

[0033] The paper machine system also includes an overflow white water tank 4. The first steam-water separator 21 is connected to the overflow white water tank 4 through a filtrate pipeline 41. The filtrate pipeline 41 is provided with a first filtrate pump 42. The overflow white water tank 4 has the function of precipitating and floating impurities. The water in the overflow white water tank 4 can dilute the paper pulp on the net, so that the paper pulp is evenly dispersed and forms normal paper sheets. The function of the overflow white water tank 4 is to collect the white water after the net cloth is washed and the white water after vacuum dehydration. The collected white water is recycled after passing through the treatment system.

[0034] The first filtrate pump 42 can discharge the liquid in the negative pressure container to the normal atmosphere. The filtrate pipeline 41 is also connected to a liquid separation pipeline 43, on which a second filtrate pump 44 is provided, and both filtrate pumps can be used to work at the same time, or only one of the filtrate pumps can be used to work, which can be adjusted according to actual working conditions.

[0035] The paper machine system further includes a liquid level control device 5, which is communicatively connected to the first steam-water separator 21, the first filtrate pump 42, and the second filtrate pump 44. The liquid level control device 5 can control the operation of the first steam-water separator 21, the first filtrate pump 42, and the second filtrate pump 44 according to the working conditions of the paper machine system.

[0036] In general, the vacuum transfer box 11, the first vacuum box 12, and the second vacuum box 13 are all connected to the conducting pipeline 24, so that the water after steam-water separation is discharged in time through the filtrate pump, ensuring that the steam-water separator works under an ideal working state, and the gas part is connected to the second steam-water separator 22 for secondary gas-liquid separation. The water content of the gas entering the second steam-water separator 22 is further reduced through the liquid level control device 5, ensuring the efficient operation of the three-dimensional flow impeller, thereby achieving the expected vacuum degree and gas suction volume to meet production needs.

[0037] The paper machine system further includes a cooling water pipeline 61 and a return pipeline 62, both of which are connected to the second steam-water separator 22. The cooling water pipeline 61 is used to provide cooling water, and the return pipeline 62 is used to return water in the second steam-water separator 22. The second steam-water separator 22 is also connected to a sealing water pipeline 63. During the papermaking process, the sealing water is mainly used to prevent the pulp from being lost on the paper machine, and can also help the paper to be better attached to the net, so that the quality of the paper is better.

[0038] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A paper machine system, characterized in that: It comprises a paper sheet dehydration component (1), a steam-water treatment component (2) and a vacuum adsorption box (7); The paper sheet dewatering assembly (1) comprises a vacuum transfer box (11), a first vacuum box (12), a second vacuum box (13) and a vacuum pressing roller (14) which are sequentially arranged along the running direction of the paper sheet; The steam-water treatment assembly (2) comprises a first steam-water separator (21), a second steam-water separator (22) and a magnetic suspension vacuum pump (23); the first steam-water separator (21) is connected to a conducting pipeline (24); the vacuum transfer box (11), the first vacuum box (12), the second vacuum box (13) and the vacuum pressing roller (14) are all connected to the conducting pipeline (24); The first steam-water separator (21) is connected to the second steam-water separator (22) via a steam transmission pipeline (25), and the magnetic suspension vacuum pump (23) is connected to the second steam-water separator (22).

2. The paper machine system according to claim 1, characterized in that The vacuum transfer box (11) is connected to the conducting line (24) via a first shunt line (26); the first vacuum box (12) and the second vacuum box (13) are connected to the conducting line (24) via a second shunt line (27); and the vacuum pressing roller (14) is connected to the conducting line (24) via a third shunt line (28).

3. The paper machine system according to claim 2, characterized in that The first branch pipeline (26) is provided with a first pressure gauge (261), the second branch pipeline (27) is provided with a second pressure gauge (271), and the third branch pipeline (28) is provided with a third pressure gauge (281).

4. The paper machine system according to claim 1, characterized in that The magnetic suspension vacuum pump (23) is connected to a permanent magnet motor (231).

5. The paper machine system according to claim 1, characterized in that The magnetic suspension vacuum pump (23) is also connected to an exhaust pipeline (232), and an exhaust control valve (233) is provided on the exhaust pipeline (232).

6. The paper machine system according to claim 1, characterized in that The paper machine system further comprises an overflow white water tank (4), the first steam-water separator (21) being connected to the overflow white water tank (4) via a filtrate pipeline (41), and a first filtrate pump (42) being provided on the filtrate pipeline (41).

7. The paper machine system according to claim 6, characterized in that The filtrate pipeline (41) is also connected to a liquid separation pipeline (43), and a second filtrate pump (44) is provided on the liquid separation pipeline (43).

8. The paper machine system according to claim 7, characterized in that The paper machine system further comprises a liquid level control device (5), wherein the liquid level control device (5) is communicatively connected to the first steam-water separator (21), the first filtrate pump (42), and the second filtrate pump (44).

9. The paper machine system according to claim 1, characterized in that The paper machine system further comprises a cooling water pipeline (61) and a return pipeline (62), wherein the cooling water pipeline (61) and the return pipeline (62) are both connected to the second steam-water separator (22).

10. The paper machine system according to claim 1, characterized in that The second steam-water separator (22) is also connected to a sealing water pipeline (63).

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