A press device for papermaking dewatering

Abstract

The application discloses a kind of papermaking dehydration press devices, it is related to papermaking machine technical field.It includes frame, driving roller is rotatably connected in frame interior, driving roller is driven by conveying motor connected on frame, driven roller is rotatably connected in frame interior;Driven roller is arranged in parallel with driving roller, and respectively at two ends in frame interior;Driven roller and driving roller are sleeved with press felt between;Corresponding paper is carried on press felt upper side;First water-collecting tank corresponding at press felt below is fixed in frame interior lower side;Press roller and lead-out roller are rotatably connected in frame interior;Press roller is correspondingly arranged in parallel above driven roller;Lead-out roller is correspondingly arranged in parallel above driving roller;Frame interior is also provided with water control assembly for extruding and dehydrating press felt.The beneficial effects of the application are that: it can press the press felt itself, ensure the dryness of press felt when continuously conveying paper, ensure the stability of paper dehydrating effect.

Description

Technical Field

[0001] This invention relates to the field of papermaking machine technology, and more particularly to a papermaking dewatering press device. Background Technology

[0002] Pressing dewatering is the core mechanical dewatering step in the papermaking process. It uses mechanical pressure to squeeze out the water from the wet paper web, significantly increasing dryness and reducing subsequent drying energy consumption. Through pressure squeezing and water conduction, the dryness of the wet paper web can be increased from about 20% (80% moisture content) to 40%-48% (paperboard can reach 50%+), significantly reducing the energy consumption of subsequent drying (drying costs are about 30 times that of pressing); at the same time, it can improve paper density and smoothness, and reduce two-sided differences.

[0003] The press blanket is an important component of the press unit. While supporting the wet paper web, it also quickly guides the pressed water away, improving the dewatering effect. However, current press blankets inevitably absorb and retain moisture during continuous water guiding, causing their own humidity to gradually increase. As the paper is transported, more water is absorbed back, thus gradually reducing the dewatering effect on the paper. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a paper dewatering press device that can press the press blanket itself to ensure the dryness of the press blanket when continuously conveying paper and to ensure the stability of the paper dewatering effect.

[0005] The technical solution adopted in this invention is as follows: A paper dewatering pressing device is provided, comprising a frame, a drive roller rotatably connected inside the frame, the drive roller being driven by a conveyor motor connected to the frame, and a driven roller rotatably connected inside the frame; the driven roller and the drive roller are arranged parallel to each other and are respectively located at opposite ends inside the frame; a pressing blanket is fitted between the driven roller and the drive roller; the upper side of the pressing blanket correspondingly carries paper; a first water collection trough corresponding to the pressing blanket is fixed on the lower side inside the frame; a press roller and a lead-out roller are rotatably connected inside the frame; the press roller is correspondingly and parallelly arranged above the driven roller; the lead-out roller is correspondingly and parallelly arranged above the drive roller; a water control component for squeezing and dewatering the pressing blanket is also provided inside the frame. The water control assembly includes two pressure rollers arranged in parallel, one above the other; the pressure rollers are rotatably connected to the frame; the pressure rollers are parallel to the driven rollers; the press blanket passes between the two pressure rollers and is pressed by the two pressure rollers; the pressure rollers and the press blanket do not contact the paper bearing surface; a second water collection tank is fixed on the frame; the second water collection tank is located below the pressure rollers.

[0006] To further optimize this technical solution, a path guiding component is also provided inside the frame of a paper dewatering press device. The path guiding component is located between the drive roller and the driven roller, and is close to the driven roller. The path guiding component includes a first-end guide roller, a middle-section guide roller, and a last-end guide roller rotatably connected to the frame. The first-end guide roller, the middle-section guide roller, and the last-end guide roller are all parallel to the squeeze roller. The upper part of the press blanket passes around the first-end guide roller, the middle-section guide roller, and the last-end guide roller in sequence, and the gap formed when it passes around is set as the installation area. One of the two squeeze rollers is located in the installation area.

[0007] To further optimize this technical solution, the upper ends of the drive roller, driven roller, first guide roller, and last guide roller of a paper dewatering press device are all on the same straight line; a filling shell is correspondingly provided on the upper side inside the installation area; the filling shell is fixedly connected to the frame; the upper surface of the filling shell and the paper bearing surface of the press blanket are on the same plane; the arc structure of the press blanket around the first guide roller and the last guide roller is adapted to the structures at both ends of the filling shell.

[0008] To further optimize this technical solution, a press device for papermaking dewatering has an air supply pipe fixed at the bottom of its filling shell, which is supplied with air by an air compressor; multiple exhaust pipes are connected to the air supply pipe; and the outlets of the exhaust pipes face upward toward the gaps between the press blanket and both ends of the filling shell.

[0009] To further optimize this technical solution, a plurality of grooves are provided on the upper end of the filling shell of a paper dewatering press device; the length direction of the grooves is parallel to the conveying direction of the press blanket.

[0010] To further optimize this technical solution, a blocking element connected to the frame is provided above the filling shell of a paper dewatering press device; the blocking element is used to block the portion of the paper passing over the mounting area.

[0011] To further optimize this technical solution, a blocking component of a paper dewatering press device is a belt conveyor; the conveying direction of the belt conveyor is opposite to the conveying direction of the press blanket.

[0012] To further optimize this technical solution, a second water collection tank of a paper dewatering press device is connected to a first water collection tank via a water guide pipe.

[0013] The beneficial effects of this invention are as follows: A press blanket is fitted between the driven roller and the drive roller, with the paper supported on its upper side. The press roller is positioned parallel to the driven roller above it, and the lead-out roller is positioned parallel to the drive roller above it. The drive roller drives the press blanket to transport the paper. The clamping action between the press roller and the driven roller provides continuous pressing and dewatering of the paper. The lead-out roller limits the direction in which the paper is drawn out. The first water collection tank collects the white water extracted during the paper pressing process.

[0014] The squeeze rollers are parallel to the driven rollers. The press blanket passes between the two squeeze rollers and is squeezed by them. The two squeeze rollers can squeeze and dewater the press blanket in time as it is conveyed, ensuring the dryness of the press blanket during continuous paper feeding and guaranteeing a stable dewatering effect on the paper. The second water collection tank can collect the white water squeezed out by the press blanket. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 for Figure 2 Left view of the infilled shell.

[0016] In the diagram, 1. Frame; 2. Drive roller; 3. Conveyor motor; 4. Driven roller; 5. Press blanket; 6. Paper; 7. First water collection tank; 8. Press roller; 9. Lead-out roller; 10. Squeeze roller; 11. Second water collection tank; 12. First guide roller; 13. Middle guide roller; 14. Tail guide roller; 15. Installation area; 16. Filler shell; 17. Air supply pipe; 18. Exhaust pipe; 19. Groove; 20. Belt conveyor; 21. Water guide pipe. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1-2 As shown, a paper dewatering press device includes a frame 1, a drive roller 2 rotatably connected inside the frame 1, the drive roller 2 being driven by a conveyor motor 3 connected to the frame 1, and a driven roller 4 rotatably connected inside the frame 1. The driven roller 4 is arranged parallel to the drive roller 2 and is located at both ends inside the frame 1. A press blanket 5 is fitted between the driven roller 4 and the drive roller 2. The upper side of the press blanket 5 carries paper 6. A first water collection tank 7 is fixed inside the lower side of the frame 1, corresponding to the area below the press blanket 5. A press roller 8 and a lead-out roller 9 are rotatably connected inside the frame 1. The press roller 8 is arranged parallel above the driven roller 4. The lead-out roller 9 is arranged parallel above the drive roller 2. The frame 1 also has a water control component for squeezing and dewatering the press blanket 5. The water control assembly includes two pressure rollers 10 arranged parallel to each other, one above the other; the pressure rollers 10 are rotatably connected to the frame 1; the pressure rollers 10 are parallel to the driven roller 4; the pressing blanket 5 passes between the two pressure rollers 10 and is pressed by the two pressure rollers 10; the pressure rollers 10 and the pressing blanket 5 do not contact the bearing surface of the paper 6; a second water collection tank 11 is fixed on the frame 1; the second water collection tank 11 is located below the pressure rollers 10.

[0019] In this scheme, the paper 6 to be dehydrated first passes between the driven roller 4 and the press roller 8, and enters the upper side of the press blanket 5 to be pressed and dehydrated. The drive roller 2 drives the press blanket 5 to continuously convey the dehydrated paper 6. Then, it passes between the drive roller 2 and the lead-out roller 9 to output the dehydrated paper 6 to the subsequent process.

[0020] During the above process, the paper 6 is continuously supported by the press blanket 5 while being conveyed. Although the portion of the paper 6 being conveyed has already been squeezed and dehydrated, if the moisture content of the press blanket 5 increases, the paper 6 will absorb some moisture again, and the moisture content of the paper 6 may rise again. Therefore, this solution includes a water control component. When the press blanket 5 passes between the two squeeze rollers 10, it is squeezed, which continuously dehydrates the press blanket 5, ensuring that the press blanket 5 maintains a low moisture content. During continuous conveying of the paper 6, the press blanket 5 can maintain a high degree of dryness, ensuring that the paper 6 has "no water to absorb" during the conveying process, thus guaranteeing the stability of the dehydration effect of the paper 6.

[0021] The squeeze roller 10 and the press blanket 5 do not contact the bearing surface of the paper 6, so that the dewatering operation of the press blanket 5 does not affect the normal conveying process of the paper 6. It should also be noted that, since the thickness of the produced paper 6, the thickness of the press blanket 5, and the required degree of dewatering vary, the squeezing gap between the two squeeze rollers 10 and the squeezing gap between the driven roller 4 and the press roller 8 in this design can be set according to actual conditions and are not specifically limited.

[0022] like Figure 1-2 As shown, a path guiding assembly is also provided inside the frame 1; the path guiding assembly is located between the drive roller 2 and the driven roller 4, and is close to the driven roller 4; the path guiding assembly includes a first-end guide roller 12, a middle-section guide roller 13 and a last-end guide roller 14 rotatably connected to the frame 1; the first-end guide roller 12, the middle-section guide roller 13 and the last-end guide roller 14 are all parallel to the extrusion roller 10; the upper part of the pressing blanket 5 passes around the first-end guide roller 12, the middle-section guide roller 13 and the last-end guide roller 14 in sequence, and the gap formed when it passes around is set as the installation area 15; one of the two extrusion rollers 10 is located in the installation area 15.

[0023] The path guiding component is designed to position the press blanket 5 near the area where the paper 6 is pressed, ensuring that the portion of the press blanket 5 that absorbs water is immediately dehydrated during transport, rather than being transported a longer distance before dehydration. This reduces the contact area between the press blanket 5 and the paper 6 before dehydration, improving the paper 6's dryness retention. The mounting area 15 isolates the paper 6 from the mounting area, preventing the squeeze roller 10 from interfering with the normal transport of the paper 6.

[0024] like Figure 2-3As shown, the upper ends of the drive roller 2, driven roller 4, first guide roller 12, and last guide roller 14 are all on the same straight line; a filling shell 16 is correspondingly provided on the upper side inside the mounting area 15; the filling shell 16 is fixedly connected to the frame 1; the upper surface of the filling shell 16 is on the same plane as the bearing surface of the press blanket 5 on the paper 6; the arc structure of the press blanket 5 around the first guide roller 12 and the last guide roller 14 is adapted to the structures at both ends of the filling shell 16.

[0025] The filling shell 16 fills the gap on the upper side of the installation area 15, making the paper 6 feed more smoothly. It can also block the dewatering position of the press blanket 5 by the squeeze roller 10, isolate it from the paper 6, and prevent water from being splashed onto the paper 6, thus increasing the humidity of the paper 6.

[0026] like Figure 2-3 As shown, an air supply pipe 17 supplied by an air compressor is fixed to the bottom of the filling shell 16; multiple exhaust pipes 18 are connected to the air supply pipe 17; the outlets of the exhaust pipes 18 face upwards toward the gaps between the press blanket 5 and both ends of the filling shell 16. The air compressor can continuously supply air to the air supply pipe 17, which is then discharged from the outlets of the exhaust pipes 18. With the help of the gaps between the press blanket 5 and the ends of the filling shell 16, the air can blow the paper 6 upwards, allowing the paper 6 to separate from the press blanket 5 as it passes through this area, facilitating complete separation during subsequent paper 6 output.

[0027] like Figure 2-3 As shown, the upper end of the filling shell 16 has multiple grooves 19; the length direction of the grooves 19 is parallel to the conveying direction of the press blanket 5. The grooves 19 can reduce the contact area between the filling shell 16 and the paper 6, while allowing some of the air blown out by the exhaust pipe 18 to enter the grooves 19, ensuring that the paper 6 can pass smoothly over the filling shell 16 without sticking to it.

[0028] like Figure 2 As shown, a blocking element connected to the frame 1 is provided above the filling shell 16; the blocking element is used to block the portion of the paper 6 that passes over the mounting area 15. The blocking element prevents the blown air from excessively separating the paper 6, thus affecting the feeding process of the paper 6.

[0029] like Figure 2 As shown, the blocking component is a belt conveyor 20; the conveying direction of the belt conveyor 20 is opposite to the conveying direction of the press blanket 5. The conveying direction setting of the belt conveyor 20 ensures the blocking effect on the paper 6 while also assisting in its conveying and guiding.

[0030] like Figure 1 As shown, the second water collection tank 11 is connected to the first water collection tank 7 via a water guide pipe 21. The water collected in the second water collection tank 11 from the pressed blanket 5 can flow into the first water collection tank 7 through the water guide pipe 21 for collection and subsequent centralized treatment.

[0031] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A paper dewatering press device, comprising a frame (1), wherein a drive roller (2) is rotatably connected inside the frame (1), and the drive roller (2) is driven by a conveyor motor (3) connected to the frame (1), characterized in that: A driven roller (4) is rotatably connected inside the frame (1); the driven roller (4) and the drive roller (2) are arranged parallel to each other and are located at opposite ends inside the frame (1); a pressing blanket (5) is fitted between the driven roller (4) and the drive roller (2); the upper side of the pressing blanket (5) is correspondingly supported by paper (6); a first water collection tank (7) corresponding to the pressing blanket (5) is fixed on the lower side inside the frame (1); a pressing roller (8) and a lead-out roller (9) are rotatably connected inside the frame (1); the pressing roller (8) is correspondingly arranged parallel above the driven roller (4); the lead-out roller (9) is correspondingly arranged parallel above the drive roller (2); a water control component for squeezing and dewatering the pressing blanket (5) is also provided inside the frame (1); The water control assembly includes two squeeze rollers (10) arranged in parallel, one above the other; the squeeze rollers (10) are rotatably connected to the frame (1); the squeeze rollers (10) are parallel to the driven rollers (4); the press blanket (5) passes between the two squeeze rollers (10) and is squeezed by the two squeeze rollers (10); the squeeze rollers (10) and the press blanket (5) do not contact the bearing surface of the paper (6); a second water collection tank (11) is fixed on the frame (1); the second water collection tank (11) is located below the squeeze rollers (10).

2. The papermaking dewatering press device according to claim 1, characterized in that: The frame (1) is also equipped with a path guiding component; the path guiding component is located between the drive roller (2) and the driven roller (4) and is close to the driven roller (4); the path guiding component includes a first end guide roller (12), a middle section guide roller (13) and a last end guide roller (14) rotatably connected to the frame (1); the first end guide roller (12), the middle section guide roller (13) and the last end guide roller (14) are all parallel to the extrusion roller (10); the upper part of the pressing blanket (5) passes around the first end guide roller (12), the middle section guide roller (13) and the last end guide roller (14) in sequence, and the gap formed when it passes around is set as the installation area (15); one of the two extrusion rollers (10) is located in the installation area (15).

3. The papermaking dewatering press device according to claim 2, characterized in that: The upper ends of the drive roller (2), driven roller (4), first guide roller (12) and last guide roller (14) are all on the same straight line; a filling shell (16) is provided on the upper side inside the installation area (15); the filling shell (16) is fixedly connected to the frame (1); the upper surface of the filling shell (16) and the bearing surface of the press blanket (5) on the paper (6) are on the same plane; the arc structure of the press blanket (5) around the first guide roller (12) and the last guide roller (14) is adapted to the structures at both ends of the filling shell (16).

4. The papermaking dewatering press device according to claim 3, characterized in that: The bottom of the filling shell (16) is fixed with an air supply pipe (17) supplied by an air compressor; multiple exhaust pipes (18) are connected to the air supply pipe (17); the outlets of the exhaust pipes (18) are directed upward toward the gaps between the pressing blanket (5) and the two ends of the filling shell (16).

5. A papermaking dewatering press device according to claim 4, characterized in that: The upper end of the filling shell (16) is provided with multiple grooves (19); the length direction of the grooves (19) is parallel to the conveying direction of the pressing blanket (5).

6. A papermaking dewatering press device according to claim 5, characterized in that: A blocking element is provided above the filling shell (16) and connected to the frame (1); the blocking element is used to block the portion of the paper (6) passing over the mounting area (15).

7. A papermaking dewatering press device according to claim 6, characterized in that: The blocking component is a belt conveyor (20); the conveying direction of the belt conveyor (20) is opposite to the conveying direction of the press blanket (5).

8. A papermaking dewatering press device according to claim 1, characterized in that: The second water collection tank (11) is connected to the first water collection tank (7) through a water guide pipe (21).

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