A paper strip dewatering assembly and paper machine

Abstract

This utility model discloses a paper tape dewatering assembly and a paper machine. The paper tape dewatering assembly includes a negative pressure device and multiple dewatering blanket assemblies. Each dewatering blanket assembly has a dewatering blanket, a vacuum suction plate, a blower head, and multiple rollers that spread the dewatering blanket. The multiple dewatering blanket assemblies together form a conveying channel for conveying and dewatering the paper tape. The vacuum suction plate has a water-absorbing surface and a negative pressure interface. The water-absorbing surface of the vacuum suction plate is in contact with the non-conveying area of ​​the corresponding dewatering blanket. The negative pressure interface is connected to the air inlet of the negative pressure device, and the air inlet of the blower head is connected to the air outlet of the negative pressure device. The blower head is used to blow air onto the non-conveying area of ​​the dewatering blanket. This allows the air inlet of the negative pressure device to draw negative pressure onto the vacuum suction plate, while its air outlet supplies air to the blower head. At this time, both the vacuum suction plate and the blower head can dewater the paper tape, so that the dewatering blanket can continuously remove more moisture from the paper tape during rotation, thus reducing the load on subsequent drying operations.

Description

Technical Field

[0001] This utility model belongs to the field of paper machines, and in particular relates to a paper tape dewatering assembly and a paper machine. Background Technology

[0002] During paper machine operation, the blankets in the press section transfer moisture from the wet paper sheet to the blankets as they pass through the press zone. The moisture-absorbing blankets are then dehydrated by the high-vacuum chamber panel and pass through the press zone again to remove moisture from the wet paper sheet. This cycle continues. The better the dehydration effect of the blankets, the more moisture is removed from the wet paper sheet, resulting in higher paper sheet dryness and higher paper belt strength exiting the press section. This means less steam is consumed in the drying section. However, the airflow blown out by the existing negative pressure equipment is not effectively utilized and is instead one of the important noise sources in the factory area. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a paper tape dewatering assembly with simple structure, good dewatering effect on dewatering blanket, and high energy consumption efficiency.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A paper tape dewatering assembly includes a negative pressure device and multiple dewatering blanket groups. Each dewatering blanket group has a dewatering blanket, a vacuum absorbent plate, and multiple rollers that spread the dewatering blanket. The multiple dewatering blanket groups together form a conveying channel for conveying the paper tape and dewatering the paper tape. The vacuum absorbent plate has an absorbent surface and a negative pressure interface. The absorbent surface of the vacuum absorbent plate is in contact with the non-conveying area of ​​the corresponding dewatering blanket. The negative pressure interface is connected to the air inlet of the negative pressure device. Each dewatering blanket group also includes a blower head. The air inlet of the blower head is connected to the air outlet of the negative pressure device. The blower head is used to blow air onto the non-conveying area of ​​the dewatering blanket.

[0005] The beneficial effects of the above technical solution are as follows: when the paper tape passes through the conveyor channel, the dehydrating blanket absorbs most of the moisture on the paper tape, and when the dehydrating blanket passes through the vacuum suction plate, the vacuum suction plate absorbs a large amount of moisture. At this time, the dehydrating blanket resumes its water absorption function, and the dehydrating blanket will be further sprayed by the blower head to further reduce its moisture content. Ultimately, the dehydrating blanket can absorb more moisture at the conveyor channel, and the moisture content of the paper tape after it is discharged from the conveyor channel is lower, thereby reducing the load of subsequent drying operations.

[0006] The above technical solution also includes a gas-liquid separator and a white water storage tank. The gas-liquid separator has a gas-liquid inlet, a drain outlet, and an exhaust outlet. The gas-liquid inlet is connected to the negative pressure interface of the vacuum suction plate. The exhaust outlet of the gas-liquid separator is connected to the air inlet of the negative pressure device. The drain outlet is connected to the inside of the white water storage tank.

[0007] The beneficial effects of the above technical solution are as follows: the water absorbed by the vacuum water absorption plate can be separated in the gas-water separator, the water can be recycled, and the gas can be blown onto the dewatering blanket through the negative pressure equipment and the blow nozzle.

[0008] In the above technical solution, the blow nozzle is located downstream of the vacuum water absorption plate along the rotation direction corresponding to the dehydration blanket.

[0009] The beneficial effect of the above technical solution is that the dehydrated blanket after absorbing water first passes through the vacuum water absorption plate for dehydration, then is blown by the blower head, and then cycles to absorb water again.

[0010] The blow nozzle described in the above technical solution is a straight strip shape and hollow inside. The side wall of the blow nozzle has an air inlet and a straight air outlet arranged along its length. The air inlet is connected to the air outlet of the negative pressure device. The blow nozzle is arranged along the width direction corresponding to the dehydration blanket.

[0011] The advantages of the above technical solution are that it has a simple structure and can blow and spray at all points along the width of the dewatering blanket.

[0012] The above technical solution also includes a heater, which is installed at the air outlet of the negative pressure device and is used to heat the airflow ejected from the blow nozzle.

[0013] The beneficial effect of the above technical solution is that the airflow blown out by the negative pressure equipment can be heated by the heater, so that the airflow blown out by the nozzle is hot air, which can dry the dewatering blanket.

[0014] The heater described in the above technical solution is a heating box or a heat exchanger.

[0015] The advantages of the above technical solution are that it has a simple structure and a good heating effect on the airflow blown out by the negative pressure equipment.

[0016] In the above technical solution, the water-absorbing surface is flat, and the vacuum water-absorbing plate is hollow inside. The water-absorbing surface is evenly distributed with suction holes that communicate with the inside of the vacuum water-absorbing plate, and the negative pressure interface communicates with the inside of the vacuum water-absorbing plate.

[0017] The beneficial effect of the above technical solution is that it makes the water absorption effect of the vacuum water absorption plate better.

[0018] In the above technical solution, the suction hole is a straight strip-shaped hole, and its length direction is consistent with the width direction of the dehydration blanket.

[0019] The beneficial effect of the above technical solution is that it further improves the water absorption effect of the vacuum water absorption plate.

[0020] The water-absorbing surface described in the above technical solution is also provided with a wear-resistant coating.

[0021] The beneficial effect of the above technical solution is that it can avoid wear on the water absorption surface of the vacuum water absorption plate.

[0022] The second objective of this invention is to provide a paper machine with a simple structure and high dewatering efficiency.

[0023] To achieve the above objectives, the technical solution of this utility model is as follows: a paper machine, comprising the paper tape dewatering assembly as described above.

[0024] The advantages of the above technical solution are: its structure is simple, it makes the paper tape drying effect good, and it has high energy utilization efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the paper tape dewatering assembly described in an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of the vacuum water absorption plate described in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram showing the distribution of suction holes on the water-absorbing surface in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the blow nozzle described in the embodiment of this utility model.

[0029] In the diagram: 1. Dewatering blanket assembly; 11. Dewatering blanket; 12. Idler roller; 13. Vacuum suction plate; 131. Absorbent surface; 132. Negative pressure interface; 133. Suction hole; 134. Wear-resistant coating; 14. Blowing nozzle; 141. Air inlet; 142. Air jet nozzle; 2. Air-liquid separator; 21. Air-liquid inlet; 22. Drain outlet; 23. Exhaust outlet; 3. Negative pressure equipment; 4. White water storage tank; 5. Heater; 6. Paper tape. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0031] Example 1

[0032] like Figures 1-4As shown, this embodiment provides a paper tape dewatering assembly, including a negative pressure device 3 and multiple dewatering blanket groups 1. Each dewatering blanket group 1 has a dewatering blanket 11, a vacuum suction plate 13, a blower head 14, and multiple idler rollers 12 that spread the dewatering blanket 11. The multiple dewatering blanket groups 1 together form a conveying channel for conveying and dewatering the paper tape. The vacuum suction plate 13 has a water-absorbing surface 131 and a negative pressure interface 132. The water-absorbing surface 131 of the vacuum suction plate 13 is in contact with the non-conveying area of ​​the corresponding dewatering blanket 11. The negative pressure interface 132 is connected to the air inlet of the negative pressure device. The blower head 14... The air inlet is connected to the air outlet of the negative pressure device 3, and the blower head 14 is used to blow air onto the non-conveying area of ​​the dewatering blanket 11. This allows the dewatering blanket to absorb most of the moisture on the paper tape 6 when it passes through the conveying channel, and a large amount of moisture to be absorbed by the vacuum absorbent plate when it passes through the vacuum absorbent plate. At this time, the dewatering blanket resumes its water absorption function, and the dewatering blanket will be further blown by the blower head to further reduce its moisture content. Ultimately, the dewatering blanket can absorb more moisture at the conveying channel, and the moisture content of the paper tape after it is discharged from the conveying channel is lower, thereby reducing the load of subsequent drying operations.

[0033] In this embodiment, the dehydration blanket bonding areas of the multiple dehydration blanket groups constitute a conveying channel that can clamp and transport the paper tape. For the dehydration blanket, the areas outside the corresponding conveying channel can be regarded as non-conveying channel areas.

[0034] The above technical solution also includes a gas-liquid separator 2 and a white water storage tank 4. The gas-liquid separator 2 has a gas-liquid inlet 21, a drain outlet 22, and an exhaust outlet 23. The gas-liquid inlet 21 is connected to the negative pressure interface 132 of the vacuum suction plate 13. The exhaust outlet 23 of the gas-liquid separator 2 is connected to the air inlet of the negative pressure device 3. The drain outlet 22 is connected to the inside of the white water storage tank 4. In this way, the water sucked out by the vacuum suction plate can be separated in the gas-liquid separator, the water can be recycled, and the gas can be blown onto the dehydration blanket through the blower head of the negative pressure device.

[0035] Since the water trapped in the paper tape is white water containing chemical components, the water absorbed by the dehydration blanket can be recycled to the white water storage tank for reuse.

[0036] The gas-water separator described in this embodiment is an existing product and can adopt the structure disclosed in CN113440988B "A Gas-Water Separator".

[0037] In the above technical solution, the blow nozzle 14 is located downstream of the vacuum water absorption plate 13 along the rotation direction corresponding to the dehydration blanket 11; thus, the dehydration blanket after water absorption first passes through the vacuum water absorption plate for dehydration, and then is blown by the blow nozzle, and then cycles to perform water absorption again.

[0038] In the above technical solution, the blowing nozzle 14 is a straight strip shape and hollow inside. The side wall of the blowing nozzle 14 has an air inlet 141 and a straight air outlet 142 arranged along its length. The air inlet 141 is connected to the air outlet of the negative pressure device 3. The blowing nozzle 14 is arranged along the width direction corresponding to the dehydration blanket 11. Its structure is simple, and it can blow air onto all parts of the dehydration blanket along its width. Specifically, the two ends of the air outlet can be flush with the sides of the dehydration blanket.

[0039] The above technical solution also includes a heater 5, which is located at the air outlet of the negative pressure device 3 and is used to heat the airflow ejected by the blower head 14. In this way, the heater can heat the airflow ejected by the negative pressure device, so that the airflow ejected by the blower head is hot air, which can dry the dewatering blanket.

[0040] The heater 5 described in the above technical solution is a heating box or heat exchanger; it has a simple structure and provides good heating effect for the airflow blown out by the negative pressure equipment. In this embodiment, when the heater is a heating box, it can adopt a structure similar to that disclosed in document CN214701253U, "A Circulating Industrial Hot Air Blower". When the heater is a heat exchanger, it can be a shell-and-tube heat exchanger, and its heat source can be hot water or steam from the workshop.

[0041] In the above technical solution, the absorbent surface 131 is a flat surface, and the vacuum absorbent plate 13 is hollow inside. The absorbent surface 131 is evenly distributed with suction holes 133 communicating with the interior of the vacuum absorbent plate 13. The negative pressure interface 132 communicates with the interior of the vacuum absorbent plate 13; this improves the water absorption effect of the vacuum absorbent plate. Preferably, the suction holes 133 are straight strips, and their length direction is consistent with the width direction of the dehydration blanket 11; this further enhances the water absorption effect of the vacuum absorbent plate. Specifically, the multiple suction holes on the absorbent surface can be distributed in multiple rows, with each row having multiple suction holes spaced apart, and the suction holes between adjacent rows are staggered (and the length of the suction hole is greater than the distance between two adjacent suction holes in the same row), thus ensuring sufficient dehydration in the width direction of the dehydration blanket.

[0042] The water-absorbing surface 131 described in the above technical solution is also provided with a wear-resistant coating 134; this can prevent wear on the water-absorbing surface of the vacuum water-absorbing plate (the wear-resistant coating can be a polytetrafluoroethylene coating or a ceramic coating).

[0043] The negative pressure device described in this embodiment is a blower.

[0044] Example 2

[0045] This embodiment provides a paper machine including the paper tape dewatering assembly as described in Embodiment 1. It has a simple structure, provides good paper tape drying effect, and has high energy utilization efficiency.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A paper tape dewatering assembly, comprising a negative pressure device (3) and a plurality of dewatering blanket groups (1), wherein each dewatering blanket group (1) has a dewatering blanket (11), a vacuum absorbent plate (13), and a plurality of idlers (12) for spreading the dewatering blanket (11), the plurality of dewatering blanket groups (1) together forming a conveying channel for conveying and dewatering the paper tape, wherein the vacuum absorbent plate (13) has an absorbent surface (131) and a negative pressure interface (132), wherein the absorbent surface (131) of the vacuum absorbent plate (13) is in contact with the non-conveyor area corresponding to the dewatering blanket (11), and the negative pressure interface (132) is connected to the air inlet of the negative pressure device, characterized in that, The dehydration blanket assembly (1) also includes a blower (14), the air inlet of which is connected to the air outlet of the negative pressure device (3), and the blower (14) is used to blow air onto the non-conveying area of ​​the dehydration blanket (11).

2. The paper strip dewatering assembly of claim 1, wherein, It also includes a gas-liquid separator (2) and a white water storage tank (4). The gas-liquid separator (2) has a gas-liquid inlet (21), a drain outlet (22) and an exhaust outlet (23). The gas-liquid inlet (21) is connected to the negative pressure interface (132) of the vacuum suction plate (13). The exhaust outlet (23) of the gas-liquid separator (2) is connected to the air inlet of the negative pressure device (3). The drain outlet (22) is connected to the interior of the white water storage tank (4).

3. The paper strip dewatering assembly of claim 1, wherein, The blow nozzle (14) is located downstream of the vacuum absorber plate (13) along the rotation direction corresponding to the dehydration blanket (11).

4. The paper strip dewatering assembly of claim 1, wherein, The blow nozzle (14) is straight and hollow inside. The side wall of the blow nozzle (14) has an air inlet (141) and a straight air outlet (142) arranged along its length. The air inlet (141) is connected to the air outlet of the negative pressure device (3). The blow nozzle (14) is arranged along the width direction corresponding to the dehydration blanket (11).

5. The paper strip dewatering assembly of claim 1, wherein, It also includes a heater (5), which is located at the outlet of the negative pressure device (3) and is used to heat the airflow ejected from the blow nozzle (14).

6. The paper strip dewatering assembly of claim 5, wherein, The heater (5) is a heating box or a heat exchanger.

7. The paper strip dewatering assembly of claim 1, wherein, The water-absorbing surface (131) is flat, and the vacuum water-absorbing plate (13) is hollow inside. The water-absorbing surface (131) is evenly distributed with suction holes (133) that communicate with the inside of the vacuum water-absorbing plate (13). The negative pressure interface (132) communicates with the inside of the vacuum water-absorbing plate (13).

8. The paper strip dewatering assembly of claim 7, wherein, The suction hole (133) is a straight strip hole, and its length direction is consistent with the width direction of the dehydration blanket (11).

9. The paper strip dewatering assembly of claim 8, wherein, The absorbent surface (131) is also provided with a wear-resistant coating (134).

10. A paper machine characterized by Includes the paper tape dewatering assembly as described in any one of claims 1-9.

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