Dewatering device and dewatering method for a wet paper web

Abstract

The present application provides a kind of for wet paper base dehydration device, comprising: support, support has at least one support surface, wet paper base is placed on support surface;Extrusion part, extrusion part has the extrusion surface that is matched with the shape of support surface, the extrusion surface is configured to be driven to extrude wet paper base;And atomizing piece, atomizing piece is set on extrusion surface, to atomize the moisture that wet paper base extrudes into water mist.The present application also relates to a kind of wet paper base dehydration method, the dehydration method is implemented by dehydration device.The dehydration device and dehydration method of the present application can be atomized and dehydrated to wet paper base of various curvatures and various thicknesses, can atomize the moisture that extrudes, reduce the moisture that remains in dehydration device, reduce the moisture content of wet paper base, improve the dryness of wet paper base, it is beneficial to reduce the energy consumption required in subsequent drying heating process of wet paper base, not only energy saving and environmental protection, but also can improve production efficiency.

Description

Technical Field

[0001] This application belongs to the field of pulp molding production equipment technology, and particularly relates to a dewatering device for wet paper blanks and a dewatering method for wet paper blanks. Background Technology

[0002] Currently, the production process of pulp molding products typically includes steps such as forming (sucking or injection, etc.), extrusion dewatering, drying, and hot pressing. In the extrusion dewatering step, due to the limitations of extrusion dewatering technology, some of the moisture in the extrusion wire, die surface, and gaps remains after the formed wet paper blank is extruded by the die. When the extrusion pressure is released and the die is separated, the moisture is drawn back into the wet paper blank due to its springback, resulting in a still very high moisture content in the wet paper blank, generally as high as 65-75%. This moisture often needs to be removed by heating and evaporation in the subsequent drying process, resulting in a large energy consumption.

[0003] Engineering practice has shown that for every 1% increase in the dryness of the wet paper blank, energy consumption during drying can be reduced by more than 3%. Therefore, it is essential to reduce moisture retention in the mold, lower the moisture content of the wet paper blank, and increase its dryness.

[0004] The content of the background section is merely the technology known to the inventor and does not necessarily represent the prior art in this field. Summary of the Invention

[0005] In view of one or more deficiencies of the prior art, the present invention provides a dewatering apparatus for wet paper blanks, comprising:

[0006] The support portion has at least one support surface, on which the wet paper blank is placed;

[0007] An extrusion section having an extrusion surface that matches the shape of the support surface, the extrusion surface being configured to be driven to extrude the wet paper blank; and

[0008] An atomizing plate is disposed on the extrusion surface to atomize the water extruded from the wet paper blank into a water mist.

[0009] According to one aspect of the invention, it further includes a covering portion that covers the outside of the support portion and defines a cavity with the support portion, wherein the squeezing portion is located within the cavity.

[0010] According to one aspect of the invention, the device further includes an air inlet, an air distribution channel, and an air collection channel, wherein the air inlet is disposed on the outer wall of the cover portion and configured to allow hot air to flow in from the air inlet; the air distribution channel is disposed on the outer wall of the cover portion and communicates with the air inlet, and is configured to allow the hot air to flow into the cavity through the air distribution channel; the air collection channel is disposed on the support portion and communicates with the cavity, and is configured to allow the water mist and the hot air to be collected and discharged from the cavity.

[0011] According to one aspect of the invention, it further includes a guide post connected to the extrusion portion and extending out of the cover portion, the guide post being configured to drive the extrusion portion to move perpendicular to the support surface; and the guide post having a through hole through which the power supply line of the atomizing plate passes and extends out of the cover portion.

[0012] According to one aspect of the invention, the atomizing plate has a plurality of atomizing plates disposed close to each other on the extrusion surface, and the extrusion surface is further provided with one or more mist discharge holes.

[0013] According to one aspect of the invention, a filter plate is also included, the filter plate having the same area as the wet paper blank and being attached to the side of the wet paper blank facing the extrusion section.

[0014] According to one aspect of the invention, it further includes a dewatering screen, the dewatering screen having the same area as the wet paper blank and being attached to the side of the filter plate facing the extrusion section; or being attached to the side of the wet paper blank facing the extrusion section.

[0015] According to one aspect of the invention, a cotton swab is further included, the cotton swab having a first end and a second end opposite to the first end; wherein the first end is attached to the side of the squeezing mesh facing the squeezing portion; the second end is attached to the side of the atomizing plate facing the squeezing mesh; the cotton swab is configured to deliver moisture from the squeezing mesh to the atomizing plate.

[0016] According to one aspect of the invention, it further includes a connecting rod, one end of which is fixedly connected to the cover portion, and the other end of which is connected to the filter plate or the squeezing net and extends through the squeezing portion.

[0017] The present invention also provides a method for dewatering wet paper blanks, comprising:

[0018] S11: Place the wet paper blank into the cavity;

[0019] S12: The wet paper blank is squeezed in the cavity;

[0020] S13: Atomize the water squeezed out of the wet paper blank into water mist; and

[0021] S14: Airflow is introduced into the cavity to expel the water mist.

[0022] The dehydration method is implemented using the dehydration apparatus described above.

[0023] The dewatering device and dewatering method of the present invention can be used to atomize and dewater wet paper blanks with various curvatures and thicknesses. This atomizes the squeezed water, reduces the water retention in the dewatering device, lowers the moisture content of the wet paper blank, and increases the dryness of the wet paper blank. This helps to reduce the energy consumption required for subsequent drying and heating of the wet paper blank, which is not only energy-saving and environmentally friendly, but also improves production efficiency. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 A schematic diagram of a dehydration apparatus according to an embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of a dehydration apparatus according to a preferred embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram of a dehydration apparatus according to another preferred embodiment of the present invention is shown;

[0028] Figure 4 A schematic diagram showing the relative positional relationship of the extrusion section, atomizing plate, guide post, connecting rod, and exhaust port according to an embodiment of the present invention is shown; and

[0029] Figure 5 A flowchart of a dehydration method according to an embodiment of the present invention is shown. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] This invention provides a dewatering device for wet paper blanks. The dewatering device uses the wet paper blanks to squeeze and dewater them, which can atomize the squeezed water, thereby reducing the moisture content of the wet paper blanks, reducing the energy consumption required in the subsequent heating and drying process, and saving costs. The following is a detailed description.

[0037] Figure 1 A schematic diagram of a dewatering apparatus 100 according to an embodiment of the present invention is shown, for dewatering wet paper blanks (such as... Figure 1 The portion shown by the cross-shaded lines (i.e., W1) undergoes dehydration. For example... Figure 1 As shown, the dewatering device 100 includes a support portion 101, a squeezing portion 102, and an atomizing plate 103. The support portion 101 has at least one supporting surface. The wet paper blank (reference) Figure 1 The paper blank (as shown in W1) is placed on the support surface; the extrusion part 102 has an extrusion surface that matches the shape of the support surface, the extrusion surface is configured to be driven to extrude the wet paper blank; the atomizing plate 103 is disposed on the extrusion surface to atomize the water extruded from the wet paper blank into water mist.

[0038] In the dehydration device 100, the number of the support portion 101 and its support surface can be one or more, as per an embodiment of the present invention, such as... Figure 1 As shown, the number of support parts 101 is, for example, one, and the number of support surfaces is, for example, three. Figure 1 The three support surfaces shown are the left side surface, upper side surface, and right side surface of the support portion 101. Furthermore, the shape of these support surfaces can be designed to match the wet paper blank (see reference). Figure 1 The shape (as shown in W1) is adapted to the plane, which can be a plane, a curved surface, or even a combination of a plane and a curved surface. The plane includes, but is not limited to, a "︹" shape (see reference). Figure 1)”, “V-shaped”, “inverted V-shaped”, “M-shaped”, “W-shaped”, “C-shaped”, etc.; the curved surface includes but is not limited to “⌒-shaped (refer to Figure 3 )”, “~-shaped”, etc.; the partial plane and partial curved surface includes but is not limited to “∩-type”, “∪-type”, etc. The present invention does not limit the specific shape of the supporting surface. In addition, it should be noted that the present invention also does not limit the specific shape of the supporting portion 101. Continuing to refer to Figure 1 , the supporting surface can be used to place the wet paper blank (refer to Figure 1 shown as W1 therein), and the area of the supporting surface is not less than the area of the wet paper blank. It should be understood that different-shaped supporting surfaces are suitable for placing different types of wet paper blanks. Specifically, for example, a planar supporting surface is more suitable for placing a wet paper blank with a smaller curvature (refer to Figure 1 shown as W1 therein), and for another example, a curved supporting surface is more suitable for placing a wet paper blank with a larger curvature (refer to Figure 3 shown as W3 therein). During actual use, it can be selected according to requirements.

[0039] The above embodiments describe the situation of the supporting portion 101. Next, the relevant content of the squeezing portion 102 will be described.

[0040] In the dewatering device 100, continuing to refer to Figure 1 , on the side of the squeezing portion 102 facing the wet paper blank, there is a squeezing surface, and the shape of the squeezing surface matches the shape of the supporting surface described above. For example, if the supporting surface is a plane as shown in Figure 1 , the squeezing squeezing squeezing]] Figure 1 ) When the multiple squeezing portions 102 are synchronously driven to squeeze the wet paper blank, the squeezing surfaces of the multiple squeezing portions 102 are closely attached to the wet paper blank on the supporting surface, enabling them to squeeze out as much moisture as possible from the wet paper blank during one squeezing process, thereby improving the dewatering efficiency of the wet paper blank. Of course, the multiple squeezing portions 102 can also be driven to squeeze the wet paper blank asynchronously, which can be determined according to the actual situation, and the present invention also does not limit this.

[0041] In the dehydration device 100, continue to refer to Figure 1 The atomizing plate 103 is disposed on the extrusion surface to atomize the water squeezed out by the wet paper blank and the water remaining in the extrusion surface into water mist. This prevents the water remaining in the extrusion surface from being reabsorbed by the wet paper blank due to its rebound when the extrusion surface detaches from the wet paper blank, thus reducing the dehydration effect. According to a preferred embodiment of the present invention, there are multiple atomizing plates 103. Preferably, multiple atomizing plates 103 are uniformly and closely disposed on the extrusion surface (see reference). Figure 4 For example, the edges of each atomizing plate are closely adjacent, and the area of ​​the plurality of atomizing plates 103 is approximately equal to that of the extrusion surface. According to one embodiment of the present invention, the number of atomizing plates 103 can be four, so as to form a gap for the guide post 108 and the connecting rod 111 to pass through (described later). It should be noted that the present invention does not limit the specific number of atomizing plates 103, but depends on the actual situation. Furthermore, the present invention does not limit the type of atomizing plate 103; preferably, the atomizing plate 103 can be an ultrasonic atomizing plate, a microporous atomizing plate, etc. In addition, one or more mist discharge holes 1021 with a diameter not less than a preset diameter (e.g., 8 mm) are also provided on the extrusion surface corresponding to the center position of each atomizing plate 103 (see reference). Figure 4 When the extrusion section 102 is driven to extrude the wet paper blank, the atomizing plate 103 adheres closely to the wet paper blank. Under ultrasonic vibration, it can atomize the water extruded from the wet paper blank, the water retained in the wet paper blank, and the water retained in the dewatering device 100 into water mist. The water mist exits from the mist discharge hole 1021 (see reference). Figure 4 The moisture content of the wet paper blank is reduced by draining the paper blank.

[0042] Continue to refer to Figure 1 According to one embodiment of the present invention, the dehydration device 100 further includes a cover 104, which covers the outside of the support 101 and defines a cavity with the support 101 (see reference). Figure 1 or Figure 2 or Figure 2As shown in Figure K), the extrusion section 102 is located within the cavity. Furthermore, the dehydration device 100 also includes an air inlet 105, an air distribution channel 106, and an air collection channel 107. The air inlet 105 is disposed on the outer wall of the cover section 104 and configured to allow hot air to flow in from the air inlet 105. The air distribution channel 106 is also disposed on the outer wall of the cover section 104 and communicates with the air inlet 105, configured to allow the hot air to flow into the cavity through the air distribution channel 106. The air inlet 105 and the air distribution channel 106 ensure that the hot air velocity within the cavity is greater than a preset velocity (e.g., 5 m / s) so that water mist can be quickly discharged. The air collection channel 107 is disposed on the support section 101 and communicates with the cavity, configured to allow the water mist and the hot air to converge and discharge from the cavity. Hot air flows into the cavity, raising the temperature inside. The hot air and water mist converge, accelerating the gas flow rate within the cavity. This facilitates the rapid removal of the wet paper blank and water mist, thereby reducing the moisture content of the wet paper blank and increasing its dryness. It should be noted that the present invention does not limit the specific shape of the covering part 104. Preferably, the shape of the covering part 104 roughly matches the shape of the supporting part 101.

[0043] Continue to refer to Figure 1 According to one embodiment of the present invention, the dehydration device 100 further includes a guide post 108, which is connected to the extrusion section 102 and extends out of the covering section 104. The guide post 108 is configured to drive the extrusion section 102 to reciprocate perpendicular to the support surface (direction of motion reference). Figure 1 or Figure 2 or Figure 3 As indicated by the arrow in the image, the moisture in the wet paper blank is squeezed out. To make the squeezing pressure on the wet paper blank more uniform, preferably, multiple guide posts 108 can be provided (e.g., two, see reference). Figure 1 When multiple guide posts 108 synchronously drive one extrusion part 102 to reciprocate perpendicularly to the support surface (refer to the direction of movement), the extrusion part 102 is connected to the same extrusion part 102. Figure 1 or Figure 2 or Figure 3 As indicated by the arrow in the diagram, the wet paper blank is subjected to more uniform extrusion pressure, allowing the water in the wet paper blank to be fully squeezed out, thereby improving the dewatering efficiency of the wet paper blank. It should be understood that the extrusion pressure should not exceed the bearing capacity of the atomizing plate 103 to avoid damaging the structure of the atomizing plate 103. Furthermore, the guide post 108 has a through hole 1081 (as shown in the diagram). Figure 1(As shown in the hollow part of the longitudinally penetrating guide post 108), the power supply line of the atomizing plate 103 passes through the through hole and extends out of the cover part 104 to connect with the driving device. The driving device drives the dewatering device 100 to vibrate ultrasonically, thereby atomizing the water squeezed out of the wet paper blank, the water retained in the wet paper blank, and the water in the dewatering device 100 into water mist and discharging it from the cavity, thereby further reducing the moisture content of the wet paper blank and increasing the dryness of the wet paper blank.

[0044] The above embodiments describe the basic structure of the dewatering device 100. In actual use, it has been found that for some wet paper blanks with small curvature, small thickness, or good water filtration (see reference...),... Figure 1 W1 in the middle), in passing Figure 1 After atomization dewatering by the dewatering device 100 shown, the moisture content of the wet paper blank is significantly reduced, reaching below 50%, which is significantly lower than the moisture content (65%-75%) after dewatering using existing dewatering devices, demonstrating excellent results. Furthermore, for some wet paper blanks with small curvature but large thickness and poor filtration (see reference...), the dewatering effect is also very good. Figure 2 W2 in the middle), or for some wet paper blanks with large curvature (refer to ... Figure 3 W3 in the middle), in through Figure 1 After atomization dewatering by the dewatering device 100 shown, the moisture content of the wet paper blank is reduced to a certain extent, but there is still room for improvement. Therefore, the applicant... Figure 1 The dehydration device 100 shown has been further improved, resulting in the improved dehydration device 200 (see reference). Figure 2 ) and dehydration device 300 (reference) Figure 3 This can further optimize the dewatering effect of various types of wet paper blanks, as described in detail below.

[0045] Figure 2 A schematic diagram of a dehydration apparatus 200 according to a preferred embodiment of the present invention is shown, as follows: Figure 2 As shown, the dehydration device 200, in addition to Figure 1 In addition to the basic components of the dewatering device 100 shown, it also includes a filter plate 109, a dewatering screen 110, and a connecting rod 111, wherein the filter plate 109 is connected to the wet paper blank (see reference). Figure 2The shape and area of ​​the W2 in the extrusion section 102 correspond to (i.e., are substantially the same) the wet paper blank, preferably completely covering the wet paper blank, adhering to the wet paper blank, and facing the extrusion surface of the extrusion section 102, for filtering moisture from the wet paper blank. The dewatering mesh 110 corresponds to (i.e., is substantially the same) the shape and area of ​​the wet paper blank, adhering to the filter plate 109, and facing the extrusion surface of the extrusion section 102, i.e., having a structure from the inside out of the wet paper blank-filter plate-dewatering mesh-atomizing sheet-extrusion surface, for extruding the filter plate 109 to accelerate the dewatering speed of the wet paper blank. One end of the connecting rod 111 is fixedly connected to the covering part 104, and the other end is connected to the filter plate 109, and passes through the extrusion section 102. The main function of the connecting rod 111 is to support and fix the filter plate 109 to prevent changes in the position of the filter plate 109 from affecting the filtration effect. Furthermore, the present invention does not limit the specific number of the connecting rods 111, that is, at least one connecting rod 111 passes through each extrusion section 102. According to a preferred embodiment of the present invention, such as Figure 4 As shown, the extrusion section 102 is provided with a plurality of atomizing plates 103, and there is a certain gap between the atomizing plates 103. A hole is formed in the gap for the connecting rod 111 to pass through (see reference). Figure 4 ). Figure 4 The diagram shows multiple circular atomizing plates, with holes formed in the gaps between every four circular atomizing plates for the connecting rod 111 to pass through. The invention does not limit the number of atomizing plates. It should be understood that the dewatering device 200 is particularly suitable for wet paper blanks with small curvature but large thickness and poor water filtration. When the extrusion section 102 is driven to extrude the wet paper blank, under the action of the filter plate 109 and the squeezing net 110, some of the moisture in the wet paper blank can be quickly filtered and squeezed out. Under the atomizing action of the atomizing plate 103, and with the combined action of the air inlet 105, the air distribution channel 106, and the air collection channel 107, water mist can be quickly discharged from the cavity, reducing the moisture remaining in the wet paper blank, the support surface, the cavity, the filter plate 109, and the extrusion net 110, thereby reducing the moisture content of the wet paper blank (which can be reduced to below 50%), increasing the dryness of the wet paper blank, reducing the energy consumption required for subsequent drying and heating of the wet paper blank, saving costs, and improving production efficiency. Depend on Figure 2 It can be seen that the dewatering device 200 is more suitable for wet paper blanks with small curvature but large thickness and poor water filtration.

[0046] Figure 3 A schematic diagram of a dehydration apparatus 300 according to another preferred embodiment of the present invention is shown, as follows: Figure 3 As shown, the dehydration device 300, in addition to Figure 1In addition to the basic components of the dewatering device 100 shown, it also includes a squeezing net 110, a connecting rod 111, and a cotton swab 112. The squeezing net 110 corresponds to the shape and area of ​​the wet paper blank (i.e., is basically the same) and is attached to the side of the wet paper blank facing the squeezing part 102, used to accelerate the squeezing out of the water from the wet paper blank on the support surface. In the dewatering device 300, one end of the connecting rod 111 is fixedly connected to the cover part 104, and the other end of the connecting rod 111 is connected to the squeezing net 110, forming a squeezing net-connecting rod-cover part structure. The main function of the connecting rod 111 is to support and fix the squeezing net 110 to prevent the position of the squeezing net 110 from changing and affecting the squeezing effect. The cotton swab 112 has a first end and a second end opposite to the first end; wherein the first end is attached to the side of the squeezing net 110 facing the squeezing section 102 (or atomizing plate 103); the second end is attached to the side of the atomizing plate 103 facing the squeezing net 110, i.e., it has a structure of wet paper blank-squeezing net-cotton swab-atomizing plate-squeezing surface; preferably, the number of cotton swabs 112 is multiple and not less than the number of atomizing plates 103, so that each atomizing plate 103 is fixed with a cotton swab 112. The cotton swab 112 is configured to transport the water in the squeezing net 110 to the atomizing plate 103 via capillary action. The water is atomized into water mist by the atomizing plate 103. With the cooperation of the air inlet 105, the air distribution channel 106, and the air collection channel 107, the moisture remaining in the wet paper blank and the dewatering device 300 is reduced, thereby lowering the moisture content of the wet paper blank (to approximately below 50%), increasing the dryness of the wet paper blank, and reducing the energy consumption required for subsequent drying and heating processes. This not only saves costs but also improves production efficiency. Figure 3 It can be seen that the dewatering device 300 is more suitable for wet paper blanks with a large curvature.

[0047] The above embodiments describe a dewatering device 200 that is more suitable for wet paper blanks with small curvature but large thickness and poor water filtration, and a dewatering device 300 that is more suitable for wet paper blanks with large curvature. In actual use, a more suitable dewatering device can be selected for atomized dewatering according to the type of wet paper blank.

[0048] Figure 4 A schematic diagram showing the relative positions of the extrusion section 102, atomizing plate 103, guide post 108, connecting rod 111, and exhaust hole 1021 according to an embodiment of the present invention is provided. Figure 4As shown, multiple atomizing plates 103 are arranged side by side and close to each other on the extrusion surface of the extrusion section 102; a mist discharge hole 1021 is provided on the extrusion surface at the corresponding position of the center of each atomizing plate 103, and the mist discharge hole 1021 passes through the extrusion section 102; the hole for the connecting rod 111 to pass through is provided at the gap between four adjacent atomizing plates 103; the hole for the guide post 108 to connect with the extrusion section 102 is also provided at the gap between adjacent atomizing plates 103.

[0049] The above describes a dewatering device for wet paper blanks. In addition, this invention also provides a dewatering method 10 for wet paper blanks. Figure 5 A flowchart of a dehydration method 10 according to an embodiment of the present invention is shown, as follows: Figure 5 As shown, method 10 includes:

[0050] S11: Place the wet paper blank into the cavity;

[0051] S12: The wet paper blank is squeezed in the cavity;

[0052] S13: Atomize the water squeezed out of the wet paper blank into water mist; and

[0053] S14: Airflow is introduced into the cavity to expel the water mist.

[0054] The dehydration method 10 is implemented by the dehydration device 100, dehydration device 200, or dehydration device 300 as described above.

[0055] According to a preferred embodiment of the present invention, the airflow is a hot airflow to prevent the atomized moisture from liquefying.

[0056] The dewatering device and method of the present invention can be used to atomize and dewater wet paper blanks with various curvatures and thicknesses. This atomizes the squeezed water, reduces the water retained in the dewatering device, lowers the moisture content of the wet paper blank (down to below 50%), and increases the dryness of the wet paper blank. This helps to reduce the energy consumption required for subsequent drying and heating of the wet paper blank, which is not only energy-saving and environmentally friendly, but also improves production efficiency.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dewatering apparatus for wet paper blanks, comprising: The support portion has at least one support surface, on which the wet paper blank is placed; An extrusion section having an extrusion surface that matches the shape of the support surface, the extrusion surface being configured to be driven to extrude the wet paper blank; An atomizing plate is disposed on the extrusion surface to atomize the water extruded from the wet paper blank into water mist. Multiple atomizing plates are disposed close to each other on the extrusion surface, which also has one or more mist exhaust holes. The atomizing plate includes an ultrasonic atomizing plate. A filter plate and a dewatering mesh are provided, the filter plate being attached to the side of the wet paper blank facing the extrusion section; the dewatering mesh being attached to the side of the filter plate facing the extrusion section; the extrusion section is driven to extrude the wet paper blank, and the filter plate and the dewatering mesh are configured to filter and extrude the water in the wet paper blank to the atomizing plate; or A squeezing screen and a cotton swab, the squeezing screen being attached to the side of the wet paper blank facing the extrusion section; the cotton swab having a first end and a second end opposite to the first end; wherein the first end is attached to the side of the squeezing screen facing the extrusion section; the second end is attached to the side of the atomizing plate facing the squeezing screen; the cotton swab is configured to deliver moisture from the squeezing screen to the atomizing plate.

2. The dehydration device according to claim 1 further includes a covering portion, the covering portion covering the outside of the support portion and defining a cavity with the support portion, the squeezing portion being located within the cavity.

3. The dehydration device according to claim 2 further includes an air inlet, an air distribution channel, and an air collection channel, wherein the air inlet is disposed on the outer wall of the cover portion and configured to allow hot air to flow in from the air inlet; the air distribution channel is disposed on the outer wall of the cover portion and communicates with the air inlet, configured to allow the hot air to flow into the cavity through the air distribution channel; the air collection channel is disposed on the support portion and communicates with the cavity, configured to allow the water mist and the hot air to be collected and discharged from the cavity.

4. The dehydration device according to claim 3 further includes a guide post, the guide post being connected to the extrusion section and extending out of the covering section, the guide post being configured to drive the extrusion section to move perpendicular to the support surface; and the guide post having a through hole through which the power supply line of the atomizing plate passes and extends out of the covering section.

5. The dewatering apparatus according to any one of claims 1-4, wherein the filter plate has the same area as the wet paper blank.

6. The dewatering device according to claim 5, wherein the area of ​​the dewatering screen is the same as that of the wet paper blank.

7. The dewatering device according to claim 2 further includes a connecting rod, one end of which is fixedly connected to the covering part, and the other end of which is connected to the filter plate or the squeezing net and passes through the squeezing part.

8. A method for dewatering wet paper blanks, comprising: S11: Place the wet paper blank into the cavity; S12: The wet paper blank is squeezed in the cavity; S13: Atomize the water squeezed out of the wet paper blank into water mist; and S14: Airflow is introduced into the cavity to expel the water mist. The dehydration method is carried out by the dehydration apparatus as described in any one of claims 1-7.

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