Inclined wire forming system

Abstract

The utility model relates to the field of cigarette manufacturing equipment, in particular to an inclined wire forming system. The inclined wire forming system comprises a headbox, an inclined wire former, a fourdrinier slushing pool, a constant-level box and a pump station, the fourdrinier slushing pool and the constant-level box are respectively provided with a first internal circulation pipeline and a second internal circulation pipeline; the fourdrinier slushing pool and the constant-level box are arranged on the pipeline in front of the headbox, so that pulp can be internally circulated, the homogenizing effect of long fibers is improved, the fibers are fully stretched in paper pulp liquid, good conditions are created for papermaking on the net, and the uniformity of the paper pulp on the net is improved; a first internal circulation pipeline is arranged in the fourdrinier slushing pool, and a second internal circulation pipeline is arranged in the constant-level box, so that due to the multi-stage internal circulation design, the fiber dispersion uniformity and the pulp stability are improved, dispersion and stretching of fibers in the pulp are facilitated, and the uniformity of paper pulp during net feeding is improved; and the problem of fiber entanglement or sedimentation is effectively reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the field of cigarette manufacturing equipment and belongs to the field of papermaking of cigarette paper, in particular to an inclined wire forming system. BACKGROUND

[0002] Paper filter rods have excellent biodegradability, and with the development of society and the requirement of environmental protection, paper filter rods are increasingly becoming a widely used type of cigarette filter rod, which usually adopts wood pulp as raw material and adopts an inclined wire forming technology to produce required cigarette forming paper; the application of the inclined wire forming technology in long fiber special paper brings us opportunities and challenges at the same time, and the traditional production process cannot meet the high requirements of modern industry on the basis weight, fiber length and air permeability of paper, in the production process, long fibers are easy to entangle in water and cannot be uniformly dispersed, so it is difficult to form wet paper sheets with uniform thickness during papermaking, and problems such as uneven dispersion of fibers and poor uniformity of paper exist. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide an inclined wire forming system which has the characteristics of long inclined wire process net surface stroke and slow papermaking process, can make long fibers fully stretch, combines with simultaneous dehydration, can effectively deposit fibers on the net, and no large external force changes the free arrangement of fibers during the running process of the net, thereby guaranteeing the uniformity of the formed paper.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0005] An inclined wire forming system comprises a headbox and an inclined wire former arranged in cooperation with the headbox, and further comprises a long net flushing tank, a constant position tank and a pump station for feeding the headbox in sequence on a feeding pipeline of the headbox; the long net flushing tank and the constant position tank are respectively provided with a first internal circulation pipeline and a second internal circulation pipeline;

[0006] The first internal circulation pipeline comprises a circulating pool body, a first bottom feeding pipe, an overflow pipe, a first discharge port and a first circulating pipe; the first bottom feeding pipe and the overflow pipe are both mounted on the circulating pool body, the first discharge port is arranged on the overflow pipe, and the overflow pipe is in communication with the first bottom feeding pipe through the first circulating pipe;

[0007] The second internal circulation pipeline comprises a circulating tank body, a second bottom feeding pipe, a discharge pipe, a second discharge port and a second circulating pipe; the second bottom feeding pipe, the second discharge port and the discharge pipe are all mounted or arranged on the circulating tank body, and the discharge pipe is in communication with the second bottom feeding pipe through the second circulating pipe.

[0008] Further, the first circulation pipe comprises a slant pipe section, a first return bend and a vertical pipe section connected in sequence; the slant pipe section is connected with the overflow pipe, and the vertical pipe section is connected with the second inlet of the first bottom feeding pipe.

[0009] Further, the first return bend forms a bending angle α of 300-330°.

[0010] Further, the second circulation pipe comprises a first elbow section, a second return bend and a second elbow section connected in sequence; the first elbow section is connected with the discharge pipe, and the second elbow section is connected with the second inlet of the second bottom feeding pipe.

[0011] Further, the second return bend forms a bending angle β of 330-360°.

[0012] Further, a vacuum pulp washing tank is further arranged between the constant level box and the pump station; the vacuum pulp washing tank comprises a negative pressure tank body with a dilute pulp inlet and a thick pulp outlet.

[0013] Further, the vacuum pulp washing tank is provided with a first white water return pipe; the inclined wire forming system further comprises a sealing tank, and a water suction tank provided below the inclined wire section of the inclined wire former and provided with a second white water return pipe; the first white water return pipe and the second white water return pipe are both connected to the sealing tank.

[0014] Further, the inclined wire forming system further comprises a pulp tank for supplying pulp to the long net pulp washing tank; the sealing tank is in communication with the pulp tank.

[0015] Further, the inclined wire assembly in the inclined wire former comprises an inclined wire, a breast roll, a water suction tank, a couch roll, a wire drive roll, a correction roll and a tension roll; along the running direction of the inclined wire, the water suction tank is installed behind the breast roll, and the couch roll, the wire drive roll, the correction roll and the tension roll are sequentially arranged behind the water suction tank.

[0016] Further, the height of the inclined wire of the inclined wire former in the headbox weir tank is 200-500 mm.

[0017] Beneficial effects:

[0018] The application relates to an inclined wire forming system, which is characterized in that a long wire flushing pool and a constant position box are arranged on a pipeline in front of a headbox, so that the pulp can be internally circulated, the long fiber uniform pulp effect is improved, the fiber is fully stretched in the pulp liquid, good conditions are created for the wire papermaking, and the pulp uniformity when the pulp is on the wire is improved; a first internal circulation pipeline is arranged in the long wire flushing pool, and a second internal circulation pipeline is arranged in the constant position box, the multi-stage internal circulation design improves the fiber dispersion uniformity and the pulp stability, is beneficial to promoting the fiber dispersion and stretching in the pulp, and improves the pulp uniformity when the pulp is on the wire; and the fiber entanglement or sedimentation problem is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 FIG. 1 is a structural schematic diagram of the inclined wire forming system of the present application;

[0021] Figure 2 FIG. 2 is a structural schematic diagram of a long wire flushing pool in the inclined wire forming system of the present application; Figure 1

[0022] Figure 3 Figure 1

[0023] Figure 4 Figure 1

[0024] ​​​​​Wherein, 1, long net pulp tank, 2, constant position box, 3, vacuum pulp tank, 4, pump station, 5, flow box, 6, inclined net former, 7, sealing tank, 8, pulp tank, 11, first bottom feed pipe, 12, circulating tank body, 13, overflow pipe, 14, first discharge port, 15, first circulating pipe, 15-1, inclined pipe section, 15-2, first return bend, 15-3, vertical pipe section, 21, second bottom feed pipe, 22, circulating box body, 23, discharge pipe, 24, second discharge port, 25, second circulating pipe, 25-1, first elbow, 25-2, first return bend, 25-3, second elbow, 31, dilute stock inlet, 32, negative pressure tank body, 33, thick stock outlet, 34, first white water return pipe, 35, overflow port, 51, sizing main pipe, 52, weir tank, 61, inclined net, 62, breast roll, 63, suction box, 631, second white water return pipe, 64, couch roll, 65, drive net roll, 66, correction roll, 67, tension roll. DETAILED DESCRIPTION

[0025] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise specifically limited.

[0029] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of the present specification are merely used to illustrate the content disclosed in the present specification, to be understood and read by those skilled in the art, and are not used to limit the conditions of the embodiments of the present application, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0030] The embodiments of the present application are written in a progressive manner.

[0031] Please refer to Figures 1 to 4 The utility model provides a kind of oblique net forming system, including flow box 5 and with the oblique net former 6 of cooperation of described flow box, still include the long net flushing pool 1, constant position tank 2 and the pump station 4 for feeding to the flow box on the feeding line of flow box are sequentially arranged;The long net flushing pool 1 and constant position tank 2 are provided with first internal circulation line and second internal circulation line respectively;

[0032] The first internal circulation line includes circulating pool body 12, first bottom feeding pipe 11, overflow pipe 13, first discharge port 14 and first circulating pipe 15;The first bottom feeding pipe and overflow pipe are all installed in the circulating pool body 12, the first discharge port 14 is arranged in the overflow pipe 13, and the overflow pipe 13 is communicated with the first bottom feeding pipe 11 through the first circulating pipe 15.

[0033] The second internal circulation line includes circulating box body 22, second bottom feeding pipe 21, discharge pipe 23, second discharge port 24 and second circulating pipe 25;The second bottom feeding pipe, second discharge port and discharge pipe are all installed or arranged in the circulating box body 22, and the discharge pipe 23 is communicated with the second bottom feeding pipe 21 through the second circulating pipe 25.

[0034] In the above scheme, by setting the long net flushing pool and the constant position tank on the pipeline in front of the headbox, the pulp can be internally circulated, the uniform pulp effect of long fibers is improved, the fibers are fully stretched in the pulp liquid, and good conditions are created for the wire forming, thereby improving the uniformity of the pulp when the pulp is on the wire; the first internal circulation pipeline is arranged in the long net flushing pool, and the second internal circulation pipeline is arranged in the constant position tank, and the multi-stage internal circulation design improves the uniformity of fiber dispersion and the stability of the pulp, which is beneficial to promote the dispersion and stretching of the fibers in the pulp to improve the uniformity of the pulp when the pulp is on the wire; effectively reduce the problem of fiber entanglement or sedimentation. The inclined screen forming system of the application not only has the characteristics of long inclined screen process net surface stroke and gentle papermaking process, but also can fully stretch the long fibers, combine with the synchronous dehydration, effectively deposit the fibers on the net, and effectively protect the uniformity of the formed paper during the running process of the net without changing the free arrangement of the fibers by a large external force.

[0035] As shown in Figure 2 The long net flushing pool 1 comprises a first internal circulation pipeline, and the first internal circulation pipeline comprises a circulating pool body 12, a first bottom feeding pipe 11, an overflow pipe 13, a first discharge port 14 and a first circulating pipe 15; the first bottom feeding pipe 11 and the overflow pipe are both installed on the circulating pool body 12, the first discharge port 14 is arranged on the overflow pipe 13, and the overflow pipe 13 and the first bottom feeding pipe 11 are communicated through the first circulating pipe 15. The first circulating pipe 15 comprises a slope pipe section 15-1, a first return bend 15-2 and a vertical pipe section 15-3 connected in sequence; the slope pipe section 15-1 is connected with the overflow pipe 13, and the vertical pipe section 15-3 is connected with the second inlet of the first bottom feeding pipe 11; and the first inlet of the first bottom feeding pipe 11 is used to connect the material interface of the pulp pool. The bend angle α formed by the first return bend is 300-330°; in the embodiment, the bend angle α formed by the first return bend is 300°; through the pipeline design of specific angle and section combination, the phenomenon of pulp backflow and pipeline blockage is effectively reduced, and the pulp circulation efficiency is further improved.

[0036] As shown in Figure 3As shown, the constant position tank 2 comprises a second inner circulation pipeline, which comprises a circulation tank body 22, a second bottom feeding pipe 21, a discharge pipe 23, a second discharge port 24 and a second circulation pipe 25; the second bottom feeding pipe 21, the second discharge port 24 and the discharge pipe 23 are all installed or arranged in the circulation tank body 22, and the discharge pipe 23 is communicated with the second bottom feeding pipe 21 through the second circulation pipe 25. The second circulation pipe 25 comprises a first elbow part 25-1, a second return bend part 25-2 and a second elbow part 25-3 connected in sequence; the first elbow part 25-1 is connected with the discharge pipe 23, and the second elbow part 25-3 is connected with a second inlet of the second bottom feeding pipe 21; and a first inlet of the second bottom feeding pipe 21 is connected with the first discharge port 14 through a longer pipeline. The second return bend part forms a bending angle β of 330-360°; in this embodiment, the second return bend part forms a bending angle β of approximately 360°; through optimization of the design of the elbow part, the pulp flow is more stable, and the problem of pulp uniformity reduction caused by flow rate fluctuation is avoided.

[0037] Further, one-way flow guide plates with adjustable opening are arranged on the first inner circulation pipeline and the second inner circulation pipeline to avoid backflow of the pulp. Further, the one-way flow guide plates are arranged at the connection of each component.

[0038] Further, a vacuum pulp washing tank 3 is arranged between the constant position tank 2 and the pump station 4. As shown, Figure 1 the vacuum pulp washing tank 3 comprises a dilute pulp inlet 31 and a concentrated pulp outlet 33, and a negative pressure tank body 32, the upper part of the negative pressure tank body 32 is provided with an overflow port 35, and the lower part is provided with the first white water return pipe 34. The arrangement of the vacuum pulp washing tank 3 can remove a certain amount of water from the fiber during flow, so that the fiber on the inclined wire is concentrated to realize high basis weight paper.

[0039] The vacuum pulp washing tank 3 is provided with the first white water return pipe 34; the inclined wire forming system further comprises a sealing tank 7, and a water absorption tank 63 provided below the inclined wire section of the inclined wire former 6 and provided with a second white water return pipe 631, and the first white water return pipe 34 and the second white water return pipe 631 are both connected to the sealing tank 7. Further, the inclined wire forming system further comprises a pulp tank 8 for supplying pulp to the long wire pulp washing tank 1, and the sealing tank 7 is communicated with the pulp tank 8.

[0040] As shown, Figure 1As shown, the inclined wire forming system of the present application comprises a headbox 5 and an inclined wire former 6 arranged in cooperation with the headbox 5; in the direction of pulp flow, a long wire flushing tank 1, a constant position tank 2, a vacuum flushing tank 3 and a pump station 4 are arranged in sequence on the feeding pipeline in front of the headbox 5; the long wire flushing tank 1 and the constant position tank 2 both have an internal circulation pipeline, and their functions are to promote the dispersion and relaxation of fibers in the pulp, but they are arranged at different positions in the entire system, wherein the long wire flushing tank 1 is arranged behind the pulp tank 8, used to realize accurate proportioning of pulp and auxiliary materials, ensure the quality of pulp, and at the same time dilute the concentration to improve the suspension stability of the pulp in the pumping process, so as to avoid problems such as flocculation, agglomeration and sedimentation. The constant position tank 2 is arranged close to the vacuum flushing tank 3, which is an added device, and the pulp originally directly sent to the papermaking is first treated by the constant position tank 2 to further promote the dispersion and relaxation of fibers in the pulp, so as to improve the uniformity of the pulp when it is fed onto the wire; the vacuum flushing tank 3 is also an added device, and its function is to remove a certain amount of water from the pulp to improve the feeding concentration to meet the requirements of making high basis weight paper. The removed pulp water is called white water, and the first white water return pipe 34 is arranged at the lower part of the vacuum flushing tank 3. The combination of the constant position tank 2 and the vacuum flushing tank 3 not only meets the requirements of making high basis weight paper, but also meets the requirements of pulp uniformity when feeding at high concentration. If the constant position tank 2 is not arranged, although the feeding concentration is improved, the uniformity of the pulp when feeding will be poor due to the slight dehydration of the pulp. Therefore, after the vacuum flushing tank 3 is equipped, the constant position tank 2 must also be equipped, and the constant position tank 2 should be arranged in front of and close to the vacuum flushing tank 3. Because, after being treated by the constant position tank 2, the dispersion state of the fibers in the pulp not only relies on the suspension force, but also has a certain kinetic energy, and this kinetic energy can offset the sedimentation effect of the pulp when it is slightly dehydrated in the vacuum flushing tank 3, so as to achieve the purpose. After the pulp is slightly dehydrated, it is immediately sent to the headbox 5 and the inclined wire former 6 by the pump station 4 for papermaking.

[0041] The combination device of the headbox 5 and the inclined wire former 6, as shown in Figure 4As shown, the headbox 5 comprises a headbox 51 and a weir box 52, and the inclined wire former 6 comprises an inclined wire 61, a breast roll 62, a suction box 63, a couch roll 64, a wire drive roll 65, a correcting roll 66, and a tension roll 67. The headbox 51 receives the pulp from the pump station 4 and distributes it into the weir box 52, which has a weir plate at the outlet of the weir box 52 to adjust the opening of the weir. The inclined wire 61 is arranged on the weir of the weir box 52, the wire surface is inclined and always maintains a certain gap with the weir plate, and part of the inclined wire 61 in the interval is immersed into the weir box and generates a dynamic contact with a depth of up to 400 mm. The inclined wire 61 is annular and is supported by the breast roll 62, the couch roll 64, the wire drive roll 65, the correcting roll 66, and the tension roll 67. Among them, the breast roll 62 is arranged in front of the weir, the couch roll 64 is arranged behind the weir, and the inclined wire 61 between the breast roll 62 and the couch roll 64 is a forming section, and the suction box 63 is arranged below the forming section to perform dewatering treatment on the pulp being on the wire and the pulp just finished on the wire. The pulp water removed at this moment is also called white water, and the second white water return pipe 631 is arranged at the lower part of the suction box 63. The white water flowing out of the first white water return pipe 34 and the second white water return pipe 631 has basically the same composition and can be collected into the same sealed tank 7. The white water is further treated in the sealed tank 7 and then sent to the pulp tank 8 to participate in a new round of pulp making. Through the optimization of the design of the inclined wire assembly, the stability and uniformity of the wet paper sheet forming are improved, which is beneficial to guarantee the air permeability and quality consistency of the final product; the white water recycling design effectively reduces the water consumption of the system operation, improves the environmental protection performance, and further reduces the pulp cost.

[0042] It should be noted that the negative pressure tank body 32 in the vacuum pulp washing tank is also connected with a pipeline of an existing vacuum negative pressure device to provide a certain vacuum negative pressure for the tank body.

[0043] Further, the height of the inclined wire 61 of the inclined wire former 6 in the weir box 52 of the headbox 5 is 200-500 mm. Through the optimization of the design of the height parameter of the inclined wire, the forming time of the pulp on the wire surface is prolonged. When the pulp is made, the pulp concentrated in the vacuum pulp washing tank is pumped to the inclined wire, and the inclined wire can generate a forming barrier with a height of 200-500 mm in the weir box, the on-wire time is increased, and the shape of the wet paper sheet is stabilized based on the dewatering of the suction box and the forming of the inclined wire.

[0044] The inclined wire forming system of the present application solves the technical problems of uniform dispersion of fibers, improvement of pulp concentration and paper evenness. By setting a long net flushing tank and a constant position tank on the pipeline in front of the headbox, the fiber uniform pulp effect is improved, and the pulp concentration is improved by adding a vacuum flushing tank to meet the production demand of high basis weight paper, and the paper evenness and production efficiency are improved by using the synchronous dewatering and forming process of the inclined wire assembly. Specifically, the long net flushing tank and the constant position tank have an internal circulation function, the combination of the overflow pipe and the circulation pipe is used to improve the flow state of the pulp and realize the dispersion of the fibers; at the same time, the one-way guide plate design in the constant position tank avoids the backflow of the pulp and further improves the stability of the pulp; in cooperation with the vacuum flushing tank, the negative pressure tank dehydration technology is used to significantly improve the pulp concentration and provide support for the production of high basis weight paper; and the inclined wire assembly cooperates with the breast roll and the suction tank to ensure the stable forming of the wet paper sheet. The whole paper pulp making process is optimized, the pulp is dehydrated for several times, then enters the inclined wire former, forms a high concentration and uniform pulp flow, and finally completes the efficient forming in the inclined wire section.

[0045] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A inclined wire forming system comprising a flow box (5) and an inclined wire former (6) arranged in cooperation with the flow box, characterized in that, The long net flushing tank (1), the constant position tank (2) and the pump station (4) for feeding the flow slurry box are sequentially arranged on the feeding pipeline of the flow slurry box. The first inner circulation pipeline comprises a circulation tank body (12), a first bottom feeding pipe (11), an overflow pipe (13), a first discharge port (14) and a first circulation pipe (15); the first bottom feeding pipe and the overflow pipe are both mounted on the circulation tank body (12), the first discharge port (14) is arranged on the overflow pipe (13), and the overflow pipe (13) is communicated with the first bottom feeding pipe (11) through the first circulation pipe (15). The second inner circulation pipeline comprises a circulation tank body (22), a second bottom feeding pipe (21), a discharge pipe (23), a second discharge port (24) and a second circulation pipe (25); the second bottom feeding pipe, the second discharge port and the discharge pipe are all mounted or arranged on the circulation tank body (22), and the discharge pipe (23) is communicated with the second bottom feeding pipe (21) through the second circulation pipe (25).

2. The diagonal net forming system of claim 1, wherein, The first circulation pipe (15) comprises a slope pipe section (15-1), a first return bend (15-2) and a vertical pipe section (15-3) which are sequentially connected; the slope pipe section (15-1) is connected with the overflow pipe (13), and the vertical pipe section (15-3) is connected with the second inlet of the first bottom feeding pipe (11).

3. The diagonal net forming system of claim 2, wherein, The bend angle α formed by the first return bend is 300-330°.

4. The diagonal net forming system according to any one of claims 1 to 3, wherein The second circulation pipe (25) comprises a first elbow section (25-1), a second return bend (25-2) and a second elbow section (25-3) which are sequentially connected; the first elbow section (25-1) is connected with the discharge pipe (23), and the second elbow section (25-3) is connected with the second inlet of the second bottom feeding pipe (21).

5. The diagonal net forming system of claim 4, wherein, The bend angle β formed by the second return bend is 330-360°.

6. The diagonal net forming system according to any one of claims 1 to 3, 5, wherein The vacuum flushing tank (3) is further arranged between the constant position tank (2) and the pump station (4); the vacuum flushing tank (3) comprises a negative pressure tank body (32) provided with a dilute pulp inlet (31) and a thick pulp outlet (33).

7. The diagonal net forming system of claim 6, wherein, A first white water return pipe (34) is further arranged at the lower part of the vacuum flushing tank (3); the inclined net forming system further comprises a sealing tank (7) and a suction tank (63) provided below the inclined net section of the inclined net former (6) and provided with a second white water return pipe (631); the first white water return pipe (34) and the second white water return pipe (631) are both connected to the sealing tank (7).

8. The diagonal net forming system of claim 7, wherein, The inclined net assembly in the inclined net former (6) comprises an inclined net (61), a breast roll (62), a suction tank (63), a couch roll (64), a drive net roll (65), a correction roll (66) and a tensioning roll (67); along the running direction of the inclined net (61), the suction tank is mounted behind the breast roll, and the couch roll, the drive net roll, the correction roll and the tensioning roll are sequentially arranged behind the suction tank.

9. The diagonal net forming system of claim 8, wherein, The inclined wire forming system further comprises a pulp tank (8) for feeding the long net headbox (1), and the sealing tank (7) is communicated with the pulp tank (8).

10. The inclined screen forming system of any one of claims 1-3, 5, 7, 9, wherein, The height of the inclined wire (61) of the inclined wire former (6) in the weir tank (52) of the headbox (5) is 200-500 mm.

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