Non-plant fiber film forming device

Abstract

The invention discloses a non-plant fiber membrane forming device which comprises an inclined wire former for containing pulp, a headbox body is arranged on the inclined wire former, a flow mixing chamber is arranged on the headbox body, a pulp inlet pipe is arranged on the headbox body at the position of the flow mixing chamber, and a pulp outlet pipe is arranged at the position of the pulp inlet pipe. The inclined wire former is provided with a dewatering forming box and a vacuum dewatering box which are used for performing a non-plant fiber film forming process on the slurry in the headbox body, and the headbox body is provided with an air knife adjusting mechanism for applying external force to the slurry in the inclined wire former. An air knife is generated through the air knife adjusting mechanism, in this way, forward force can be given to slurry in the inclined wire forming device, meanwhile, the slurry can also generate downward force in the inclined wire forming device, the air knife generates auxiliary forming on the liquid level of the slurry in the inclined wire forming device, and the device is more suitable for non-plant fiber film forming; and the non-plant fiber film is smaller in variable coefficient in forming, so that the requirement of a finished product can be better met, the application requirement can be further met, and great market value is achieved.

Description

Technical Field

[0001] The present invention relates to a non-plant fiber membrane forming device, which is mainly used in the production field of special materials (such as nanofiber diaphragm materials, nano-aramid materials, nano-carbon nanotube materials, etc.) using nanofibers as raw materials. Background Art

[0002] As we all know, special material properties have become a new hot spot for development at home and abroad. Among them, nanofibers can be used to enhance composite materials, such as carbon nanofibers and carbon nanotubes. They can also be used in high-efficiency filtration media to significantly improve filtration efficiency. They can also be used in the biomedical field, precision electronics and optical devices. These new fields have huge market potential.

[0003] At present, due to the wide variety of non-plant fibers, the production process of non-plant fiber membranes is mainly affected by the characteristics of the raw materials, especially the specific gravity, shape and hydrophilicity of the raw materials, etc. This will cause the porosity of the formed holes in the finished membrane to fail to meet the use requirements, and the coefficient of variation is large, which will not meet the requirements of the finished product and finally cannot meet the application needs. Based on this phenomenon, it is necessary to improve the existing technology. Summary of the invention

[0004] 1. Technical issues that need to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a non-plant fiber film forming device, which develops a non-plant fiber film forming mechanism specifically suitable for producing non-plant fiber materials.

[0006] (II) Technical solutions that need to be adopted

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A non-plant fiber membrane forming device comprises an inclined wire former for accommodating slurry, a headbox body on the inclined wire former, a mixing chamber provided on the headbox body, a slurry inlet pipe provided on the headbox body at the position of the mixing chamber, a dewatering forming box and a vacuum dewatering box for performing a non-plant fiber membrane forming process on the slurry in the headbox body provided on the inclined wire former, and a wind knife adjustment mechanism for applying an external force to the slurry in the inclined wire former provided on the headbox body.

[0009] Preferably, the wind knife adjustment mechanism comprises a fixing frame arranged on the inclined mesh former, a blower and a wind knife generator are installed on the fixing frame, and the wind knife generator is arranged on the blower.

[0010] Preferably, at least one of the wind knife adjustment mechanisms is provided on the inclined screen former.

[0011] Preferably, the air inlet pressure stabilizing main pipe includes an air inlet pressure stabilizing main pipe connected to the blower, a slit air duct is provided on the air inlet pressure stabilizing main pipe, a mixed flow channel is provided on the slit air duct, an air wing is provided inside the mixed flow channel, and an air outlet that can discharge air to form a wind knife is provided on the mixed flow channel.

[0012] Preferably, the slit air duct may be arranged in multiple holes.

[0013] Preferably, the angle between the wind knife generated by the air outlet and the slurry liquid surface of the inclined screen former is 3° to 15°.

[0014] Preferably, it also includes a liquid level stabilization and adjustment mechanism arranged on the headbox body.

[0015] Preferably, a homogenizing mechanism for improving the uniformity of the slurry is provided on the headbox body.

[0016] Preferably, the mixing chamber and the slurry inlet pipe are arranged in a concave-convex shape.

[0017] Preferably, the inclined wire former comprises a frame and a forming wire arranged on the frame, and the frame is provided with a main driving wire roller and a slave driving wire roller for driving the forming wire to rotate.

[0018] (III) Technical effects to be achieved

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] Firstly, the present invention comprises an inclined mesh former for accommodating slurry, a flow box body on the inclined mesh former, a mixing chamber is arranged on the flow box body, a slurry inlet pipe is arranged on the flow box body at the mixing chamber position, a dewatering forming box and a vacuum dewatering box are arranged on the inclined mesh former for performing a non-plant fiber membrane forming process on the slurry in the flow box body, a wind knife adjustment mechanism is arranged on the flow box body for giving an external force to the slurry in the inclined mesh former, such an arrangement generates a wind knife through the wind knife adjustment mechanism, which is beneficial to give a forward force to the slurry in the inclined mesh former, and at the same time, the slurry will also exert a downward force in the inclined mesh former, and the wind knife produces auxiliary forming on the slurry liquid level in the inclined mesh former, which is more beneficial to the non-plant fiber membrane forming, and the variation coefficient in the non-plant fiber membrane forming is smaller (that is, the product pore size is more stable), and the porosity variation coefficient is: ≤4%, which can better meet the finished product requirements, and thus can meet the application needs, and has great market value.

[0021] Secondly, the wind knife adjustment mechanism of the present invention includes a fixed frame arranged on the inclined mesh former, on which a blower and a wind knife generator are installed, and the blower is provided with a wind knife generator. It is not only simple in structure and easy to manufacture, but more importantly, it is helpful to give an external force to the slurry in the inclined mesh former. This external force will exert a forward force on the slurry in the inclined mesh former, and will also generate a downward force, which will ultimately help the wind knife to assist in shaping the slurry liquid level in the inclined mesh former. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 It is a schematic cross-sectional view of the air knife generator of the present invention.

[0024] Figure 3 It is a schematic diagram of the wind knife generator of the present invention when viewed from above.

[0025] In the figure: 1, inclined screen former; 2, headbox body; 3, mixing chamber; 4, slurry inlet pipe; 5, dewatering forming box; 6, vacuum dewatering box; 7, air knife adjustment mechanism; 8, liquid level stabilization adjustment mechanism; 9, homogenization mechanism; 11, frame; 12, forming screen; 13, main drive screen roller; 14, slurry horizontal liquid level; 71, fixed frame; 72, air knife generator; 721, air inlet pressure stabilizing main pipe; 722, slit air duct; 723, mixing flow duct; 724, air wing; 725, air outlet. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0027] In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0030] Example 1: See Figure 1 , Figure 2 Figure 3A non-plant fiber film forming device is mainly used for forming non-plant fiber raw materials. The device is suitable for forming nanofiber slurry with a low concentration of 0.01% to 0.1%, wherein the nanofiber slurry with a low concentration of 0.03% to 0.05% is preferably formed. The device comprises an inclined mesh former 1 for accommodating slurry, a headbox box 2 on the inclined mesh former 1, a mixing chamber 3 is arranged on the headbox box 2, a slurry inlet pipe 4 is arranged on the headbox box 2 at the position of the mixing chamber 3, a dewatering forming box 5 and a vacuum dewatering box 6 for performing a non-plant fiber film forming process on the slurry in the headbox box 2 are arranged on the inclined mesh former 1, and an air knife adjustment mechanism 7 for applying an external force to the slurry in the inclined mesh former 1 is arranged on the headbox box 2. This arrangement generates a A wind knife is provided, which is beneficial to give a forward force to the slurry in the inclined wire former 1, and at the same time the slurry will also have a downward force in the inclined wire former 1. The wind knife produces auxiliary shaping on the slurry liquid surface in the inclined wire former 1, which is more conducive to the formation of non-plant fiber membranes. The coefficient of variation in the formation of non-plant fiber membranes is smaller (that is, the product pore size is more stable), and it is more able to meet the requirements of finished products, and then can meet application needs, and has significant market value. Non-plant fibers include various chemical fibers, such as aramid materials, polypropylene (PP) materials, polyphenylene sulfide (PPS) materials, polyether ketone (PEK) materials, polylactic acid (PLA, also known as polylactide) materials, polyimide fibers (PI) materials and other chemical fibers with different specific gravities, including single or mixed forming nets.

[0031] Embodiment 2: It can be explained on the basis of embodiment 1, such as Figure 1 , Figure 2 Figure 3 As shown, the wind knife adjustment mechanism 7 includes a fixed frame 71 arranged on the inclined mesh former 1, and a blower (indicated in the figure) and a wind knife generator 72 are installed on the fixed frame 71. The wind knife generator 72 is arranged on the blower. For example, a blower is installed on one side of the wind knife generator 72, and the wind generated by the blower is supplied to the wind knife generator 72. The wind knife generator 72 generates a wind knife, which is beneficial to give an external force to the slurry in the inclined mesh former 1. This external force will exert a forward force on the slurry in the inclined mesh former 1, and will also generate a downward force, which will ultimately help the wind knife to assist in shaping the slurry liquid surface in the inclined mesh former 1. At least one wind knife adjustment mechanism 7 can be set according to the inclined screen former 1. In the present embodiment, there are two wind knife adjustment mechanisms 7, which is conducive to forming a more powerful wind knife, and ultimately helps to give an external force to the slurry in the inclined screen former 1. This external force will exert a forward force on the slurry in the inclined screen former 1, and will also generate a downward force, which will ultimately help the wind knife to assist in shaping the slurry liquid surface in the inclined screen former 1.

[0032] Among them Figure 1 , Figure 2 Figure 3 As shown, the air inlet pressure stabilizing main pipe 72 includes an air inlet pressure stabilizing main pipe 721 connected to the blower, which is conducive to the transmission of wind generated in the blower to the air inlet pressure stabilizing main pipe 721, and a slit air duct 722 is arranged on the air inlet pressure stabilizing main pipe 721, and a mixed flow channel 723 is arranged on the slit air duct 722. An air wing 724 is arranged inside the mixed flow channel 723. When entering the mixed flow channel 723 at the beginning, it is not separated, but when passing through the air wing 724, it is separated and then converged together. The mixed flow channel 723 is provided with an air outlet 725 that can discharge wind to form a wind knife. This arrangement is conducive to the discharge of air through the air outlet 725, and the discharged wind forms a wind knife, which is conducive to giving an external force to the slurry in the inclined mesh former 1. This external force will exert a forward force on the slurry in the inclined mesh former 1, and will also generate a downward force, which will ultimately help the wind knife to assist in the shaping of the slurry liquid surface in the inclined mesh former 1. The air wing 724 in the present invention is similar to a wing, and can move air from top to bottom like an airplane in the air. It is also worth noting that the slit air duct 723 can be arranged in multiple holes, and can be arranged according to actual needs, with a large room for choice. In the present invention, the blower is a commonly used process equipment in the art, so it is not described in detail.

[0033] Among them Figure 1 , Figure 2 Figure 3 As shown, the angle (included angle) between the wind knife generated by the air outlet 725 and the slurry liquid surface of the inclined mesh former 1 is 3° to 15°, preferably 5° to 10°, which is conducive to the generated wind knife giving a forward force to the slurry in the inclined mesh former 1, and at the same time, the slurry will also exert a downward force in the inclined mesh former 1, which is ultimately conducive to the wind knife to assist in shaping the slurry liquid surface in the inclined mesh former 1. The air volume and wind pressure of the wind knife can be automatically adjusted according to the speed of non-plant fiber film formation, the wind speed ≥ the speed of the forming mesh in the inclined mesh former 1, the speed ratio is 1.0 to 3.0, preferably 1.5 to 2.0, and the wind pressure is 100Pa to 3000Pa, preferably 500Pa to 2000Pa. During use, the wind speed can be controlled by adjusting the blower.

[0034] Embodiment 3: It can be described on the basis of Embodiment 1 or Embodiment 2, such as Figure 1 As shown, it also includes a liquid level stabilization adjustment mechanism 8 arranged on the slurry box body 2, and the liquid level stabilization adjustment mechanism 8 can control the amount of slurry in and out of the mixing chamber 3, which is conducive to adjustment according to actual needs. Specifically, the liquid level stabilization adjustment mechanism 8 includes a mounting frame arranged on the slurry box body 2, and an automatically rising and falling adjustment control panel is arranged on the mounting frame, wherein the automatically rising and falling adjustment control panel is realized by a hydraulic cylinder and an adjustment panel, so that the slurry in and out is controlled by moving the adjustment panel up and down, which is more conducive to meeting the use requirements.

[0035] Embodiment 4: It can be explained on the basis of Embodiment 1 or Embodiment 2 or Embodiment 3 that a homogenizing mechanism 9 for improving the uniformity of the slurry is provided on the headbox body 2. This arrangement is conducive to making the slurry more evenly arranged, changing the liquid shape, and improving the uniformity of the forming. It is further explained that the homogenizing mechanism 9 is located in the headbox body 2 of the subsequent process of the mixing chamber 3. This arrangement is conducive to improving the uniformity of the slurry before the process is carried out. It is further explained that the homogenizing mechanism 9 uses at least one roller or a stirring drum, and in this embodiment, two rollers are used to perform disturbance to achieve the effect of turbulence.

[0036] Embodiment 5: It can be described on the basis of embodiment 1 or embodiment 2 or embodiment 3 or embodiment 4 that the mixing chamber 3 and the slurry inlet pipe 4 form a concave and convex arrangement, which allows the feed slurry to roll up and down (with a turbulent effect) in order to make the subsequent fibers more uniform.

[0037] Embodiment 6: It can be described on the basis of embodiment 1 or embodiment 2 or embodiment 3 or embodiment 4 or embodiment 5, that the inclined net former 1 includes a frame 11 and a forming net 12 arranged on the frame 11, and the frame 11 is provided with a main drive net roller 13 and a slave drive net roller for driving the forming net 12 to rotate, and the rotation of the forming net 12 (also called an endless net, without joints) is achieved by the drive net roller 13 and the slave drive net roller, which is conducive to the non-plant fiber membrane being formed after being processed by the dewatering forming box 5 and the vacuum dewatering box 6 in the pulp box body 2, thereby meeting the use requirements.

[0038] Among them, the air permeability of the forming mesh 12 is 5000m 3 / m 2 ·h~8000m 3 / m 2 h, the speed is 1-30 m / min, preferably 5-15 m / min, this setting is conducive to better production of uniform non-plant fiber membranes with a porosity of 50%-65%. Among them, the negative pressure of the inclined net former 1 gradually increases in the direction of the production process, generally 100Pa-3000Pa, preferably 2000Pa, which is conducive to the vacuum dehydration box 6 The negative pressure gradually increases in the direction of the production process flow, which is conducive to better dehydration (vacuum).

[0039] Among them, the angle between the inclined forming net 12 and the horizontal plane is 3 degrees to 20 degrees, preferably 5 degrees to 10 degrees, and the angle between the inclined forming net 12 and the horizontal liquid surface 14 of the slurry in the inclined net former 1 is 3 degrees to 20 degrees, preferably 5 degrees to 10 degrees, that is, the angle between the inclined forming net 12 and the horizontal plane and the angle between the inclined forming net 12 and the horizontal liquid surface of the slurry in the inclined net former 1 are consistent, which is more conducive to the pulp box body 2 to become a non-plant fiber membrane with a smaller coefficient of variation, that is, ≤4% (that is, the product pore size is more stable) after being processed by the dewatering forming box 5 and the vacuum dewatering box 6, thereby meeting the use requirements.

[0040] The formed non-plant fiber membrane produced by the present invention has a membrane thickness of 25um to 600um, preferably 25um, 60um, 80um, 100um, 150um, 200um, 220um, 500um or 600um, etc.; cross-sectional thickness difference: ±5% (conventional ±10%); porosity: 50%-65%; porosity variation coefficient: ≤4% (conventional ≤12%), and the variation coefficient is smaller, so the porosity of the formed non-plant fiber membrane can reach 50% to 65%, and the porosity variation coefficient: ≤4%, which is more able to meet the finished product requirements than the conventional ones, and can meet the application needs, and has great market value.

[0041] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part adopt conventional means such as mature bolts and rivets in the existing technology. The internal components of the dehydration forming box and the vacuum dehydration box all adopt conventional models in the existing technology, and their internal structures belong to the existing technology structure. Workers can complete normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the existing technology, and no specific description is given here.

[0042] It should be noted that, although the above embodiments have been described in this article, the scope of patent protection of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the patent of the present invention.

Claims

1. A non-plant fiber film forming device, characterized in that: The invention comprises an inclined mesh former (1) for accommodating slurry, a headbox body (2) on the inclined mesh former (1), a mixing chamber (3) provided on the headbox body (2), a slurry inlet pipe (4) provided on the headbox body (2) at the position of the mixing chamber (3), a dewatering forming box (5) and a vacuum dewatering box (6) provided on the inclined mesh former (1) for performing a non-plant fiber film forming process on the slurry in the headbox body (2), and a wind knife adjustment mechanism (7) provided on the headbox body (2) for applying an external force to the slurry in the inclined mesh former (1).

2. The non-plant fiber film forming device according to claim 1, characterized in that: The wind knife adjustment mechanism (7) comprises a fixing frame (71) arranged on the inclined mesh former (1), a blower and a wind knife generator (72) are installed on the fixing frame (71), and the wind knife generator (72) is arranged on the blower.

3. The non-plant fiber film forming device according to claim 1 or 2, characterized in that: At least one of the wind knife adjustment mechanisms (7) is provided on the inclined screen former (1).

4. The non-plant fiber film forming device according to claim 1 or 2, characterized in that: The air inlet pressure stabilizing main pipe (72) comprises an air inlet pressure stabilizing main pipe (721) connected to the blower, a slit air duct (722) is provided on the air inlet pressure stabilizing main pipe (721), a mixed flow channel (723) is provided on the slit air duct (722), an air wing (724) is provided inside the mixed flow channel (723), and an air outlet (728) capable of discharging air to form a wind knife is provided on the mixed flow channel (724).

5. The non-plant fiber film forming device according to claim 4, characterized in that: The slit air duct (723) may be arranged in multiple holes.

6. The non-plant fiber film forming device according to claim 4, characterized in that: The cutting angle between the wind knife generated by the air outlet (725) and the slurry liquid surface of the inclined screen former (1) is 3° to 15°.

7. The non-plant fiber film forming device according to claim 1, 2, 5 or 6, characterized in that: It also includes a liquid level stabilization adjustment mechanism (8) arranged on the headbox body (2).

8. The non-plant fiber film forming device according to claim 1, 2, 5 or 6, characterized in that: The headbox body (2) is provided with a homogenizing mechanism (9) for improving the uniformity of the slurry.

9. The non-plant fiber film forming device according to claim 1, 2, 5 or 6, characterized in that: The mixing chamber (3) and the slurry inlet pipe (4) are arranged in a concave-convex shape.

10. The non-plant fiber film forming device according to claim 1, 2, 5 or 6, characterized in that: The inclined mesh former (1) comprises a frame (11) and a forming mesh (12) arranged on the frame (11); the frame (11) is provided with a main mesh drive roller (13) and a secondary mesh drive roller for driving the forming mesh (12) to rotate.

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