A square screen box of a papermaking coating recovery system and the recovery system

Abstract

The utility model relates to a kind of papermaking coating's recovery system's square sieve screen box and recovery system, including box;Feed pipe, the feed pipe is set on the lateral wall of the box;First reflux plate, the first reflux plate is obliquely arranged in the box, and multiple first through holes are equipped on the first reflux plate;Baffle, the baffle is arranged at the bottom of the first reflux plate, the baffle is integrally formed or fixedly connected with the first reflux plate, and the baffle is obliquely arranged in the box;And discharge port, the discharge port is arranged on the lateral wall of the box.The utility model discloses papermaking coating's recovery system's square sieve screen box and recovery system, reduce coating impact force, reduce the bubble generated, to reduce or avoid the problems such as leakage coating, bubble pressure point increase, improve the coating quality and printing performance of paper, improve yield and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of papermaking production equipment technology, specifically to a square screen box and recycling system for a papermaking coating recycling system. Background Technology

[0002] Paper coating is the process of uniformly coating one or more layers of coating material (mainly composed of pigments, adhesives, additives and water) onto the surface of the base paper to improve the paper's smoothness, gloss, printability and other properties.

[0003] In the paper coating process, when the coating head applies too much coating and the coating equipment (such as doctor blade or roller coater) applies more coating than the paper can absorb, excess coating will be generated. This excess coating needs to be recycled, otherwise it will increase the wastewater treatment load and increase production costs.

[0004] In the current coating production process, the reuse of recycled coatings is an important way to reduce costs and improve resource utilization. During the recycling process, square screens are commonly used filtration equipment. However, due to the impact force on the coating fluid, a large number of air bubbles easily form inside the screen box, leading to missed coatings, increased bubble pressure points, and affecting the coating quality and printing performance of the product. Consequently, the quality of the recycled coatings cannot meet production quality requirements. Utility Model Content

[0005] Therefore, there is a need to provide a square screen box for a paper coating recycling system to solve the technical problem that during the recycling process, when the recycled coating is filtered through a square screen, a large number of air bubbles easily appear in the square screen box due to the impact force on the coating fluid. This leads to missed coating, an increase in air bubble pressure points, and affects the coating quality and printing performance of the product. The quality of the recycled coating cannot meet the production quality requirements.

[0006] To achieve the above objectives, the inventors provide a square sieve box and a recycling system for paper coating recycling, comprising:

[0007] Box;

[0008] A feed pipe is disposed on the side wall of the housing;

[0009] The first reflux plate is inclinedly disposed in the box, and the first reflux plate is provided with a plurality of first through holes;

[0010] A baffle is disposed at the bottom of the first reflux plate. The baffle is integrally formed or fixedly connected to the first reflux plate. The baffle is disposed at an angle inside the box.

[0011] And a discharge port, which is located on the side wall of the box.

[0012] As a preferred structure of this utility model, the first reflux plate is inclinedly embedded in the box body, and slots are provided on both sides of the box body;

[0013] The slot includes two card plates, which are symmetrically arranged at intervals and both card plates are fixedly connected to the box body.

[0014] As a preferred structure of this utility model, the tilt angle of the first reflux plate is 40-50°, and the tilt angle of the baffle is 40-50°.

[0015] As a preferred structure of this utility model, the top of the first reflux plate is provided with a handle, which is integrally formed or fixedly connected to the first reflux plate.

[0016] As a preferred structure of this utility model, a plurality of first through holes are evenly distributed on the first reflux plate, and the diameter of the first through holes is 3-7 mm.

[0017] In a preferred embodiment of this invention, the baffle is disposed at the bottom of the first reflux plate, and the left and right sides of the baffle are wrapped by the first reflux plate.

[0018] As a preferred structure of this utility model, there are multiple feed pipes, which are distributed at intervals.

[0019] As a preferred structure of this utility model, the square screen box further includes a second reflux plate. The first reflux plate is disposed on the side close to the feed pipe, and the second reflux plate is vertically disposed in the box body. The second reflux plate is disposed on the side away from the feed pipe. The second reflux plate is spaced apart from the first reflux plate, and the second reflux plate is provided with a plurality of second through holes.

[0020] The advantages of the above technical solution, which differs from the existing technology, are as follows: In the square screen box of the paper coating recycling system of this utility model, when the coating flows through the first return plate, the impact force of the coating is initially reduced due to the obstruction of the bottom baffle, and it stays briefly at the bottom of the box. As the feed pipe slowly transports the coating into the box, the coating level in the box gradually rises. The raised coating passes through multiple first through holes on the first return plate, and is divided from a large-impact fluid into numerous small-impact fluids. Because the first return plate is inclined in the box, the flow direction of the divided coating changes from a straight flow to an oblique flow, further reducing the impact force of the coating and reducing the generation of bubbles. This reduces or avoids problems such as missed coating and increased bubble pressure points, thereby improving the coating quality and printing performance of the paper, increasing the yield and production efficiency.

[0021] To achieve the above objectives, the inventors also provide a paper coating recycling system, including a square screen box as described in any of the paper coating recycling systems provided by the inventors above.

[0022] As a preferred embodiment of this invention, the paper coating recycling system further includes:

[0023] The material tray is connected to the square screen box of the paper coating recycling system via a pipe, and the material tray is used to receive coating.

[0024] And a storage tank, which is connected to the square screen box of the paper coating recycling system via a pipeline, and the storage tank is used to store coatings.

[0025] The advantages of the above technical solution, unlike existing technologies, are as follows: In the paper coating recycling system of this utility model, when the coating flows through the square screen box, the impact force of the coating is initially reduced due to the obstruction of the bottom baffle, and it briefly stays at the bottom of the box. As the feed pipe slowly transports the coating into the box, the coating level in the box gradually rises. The risen coating, through multiple first through holes on the first return plate, is differentiated from a single large-impact fluid into numerous smaller-impact fluids. Furthermore, because the first return plate is inclined within the box, the flow direction of the differentiated coating changes from a straight flow to an oblique flow, further reducing the impact force of the coating and reducing the generation of air bubbles. This reduces or avoids problems such as missed coating and increased air bubble pressure points, improving the coating quality and printing performance of the paper, increasing the yield and production efficiency. Moreover, the paper coating recycling system of this utility model achieves coating recycling, avoiding coating waste, thereby reducing production costs and improving resource utilization.

[0026] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0027] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0028] In the accompanying drawings of the instruction manual:

[0029] Figure 1 This is a schematic diagram of the paper coating recycling system described in a specific embodiment;

[0030] Figure 2 This is one of the structural schematic diagrams of the square sieve box described in the specific implementation embodiment;

[0031] Figure 3 This is a second schematic diagram of the structure of the square sieve box described in the specific implementation method;

[0032] Figure 4 A front view of the first reflux plate in a specific embodiment;

[0033] Figure 5 This is a front view of the second reflux plate in a specific embodiment.

[0034] The reference numerals used in the above figures are explained as follows:

[0035] 100. Material tray,

[0036] 200. Square sieve box.

[0037] 300. Storage tank,

[0038] 1. Box body,

[0039] 11. Pallet,

[0040] 2. Feed pipe,

[0041] 3. First reflux plate,

[0042] 31. First through hole,

[0043] 32. Handle

[0044] 4. Baffle

[0045] 5. Second reflux plate,

[0046] 51. Second through hole,

[0047] 6. Discharge port. Detailed Implementation

[0048] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0049] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0050] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0051] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0052] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0053] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0054] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0055] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. These expressions are only for the convenience of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. Furthermore, in this context, it should be understood that when it is mentioned that an element is connected "on" or "below" another element, it can be directly connected not only to the other element "on" or "below," but also indirectly connected to the other element "on" or "below" through an intermediate element.

[0056] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] Please see Figures 1 to 5 This embodiment relates to a paper coating recycling system, including a material tray 100, a storage tank 300, and a square sieve box 200 for the paper coating recycling system. The material tray 100 and the square sieve box 200 of the paper coating recycling system are connected by a pipe, and the material tray 100 is used to receive coatings. The storage tank 300 and the square sieve box 200 of the paper coating recycling system are connected by a pipe, and the storage tank 300 is used to store coatings, wherein the square sieve is used to filter coatings.

[0058] Specifically, in this embodiment, such as Figures 1 to 5As shown, the material tray 100 is connected to the square sieve box 200 via a pipeline, and its function is to collect the paint dripping during the coating process. In the coating production site, paint inevitably drips from the coating equipment. The material tray 100 can collect these dripping paints in a timely manner and guide them into the square sieve box 200 for filtration via a pump and pipeline. The storage tank 300 is also connected to the square sieve box 200 via a pipeline and is used to store the paint that has been filtered by the square sieve box 200, realizing paint recycling and avoiding paint waste. The paint in the storage tank 300 can be pumped back to the coating head, completing the recycling of the paint, thereby reducing production costs and improving resource utilization.

[0059] Please see Figures 1 to 5 This embodiment relates to a square sieve box 200 and a recycling system for paper coatings, wherein the square sieve box 200 in this embodiment is a sieve box for a square sieve, comprising:

[0060] Box 1; Box 1 is the main load-bearing structure of the entire square screen box 200, providing space for the filtration of coatings inside. Box 1 is made of corrosion-resistant and high-strength materials such as stainless steel, and the inner surface is smoothed. This design can reduce the adhesion of coatings to the walls of box 1, avoid problems such as coating residue and bacterial growth, and also facilitate subsequent cleaning and maintenance.

[0061] Feed pipe 2 is located on the side wall of the box 1; the function of feed pipe 2 is to introduce the backflow coating generated during the coating process from the material tray 100 into the screen box.

[0062] The first return plate 3 is inclinedly arranged inside the housing 1. This arrangement changes the flow direction of the coating from a straight stream to an oblique flow, thereby reducing the impact force on the coating and reducing the formation of bubbles. The first return plate 3 has multiple first through holes 31. By having multiple first through holes 31, the coating, which initially has a large impact force, is divided into numerous smaller impact forces, further reducing the impact force on the coating and reducing the formation of bubbles. Furthermore, the multiple first through holes 31 also perform preliminary filtration of the coating, trapping larger impurities such as fiber bundles and clumps of pigment, preventing these impurities from entering subsequent filtration stages and coating processes, thus affecting the coating quality and coating effect.

[0063] A baffle 4 is disposed at the bottom of the first return plate 3, and the baffle 4 is integrally formed with the first return plate 3; or in other embodiments, the baffle 4 and the first return plate 3 are fixedly connected by welding. The baffle 4 is inclinedly disposed inside the housing 1; wherein when the paint flows through the first return plate 3, the impact force of the paint is initially reduced due to the blocking effect of the bottom baffle 4, thus reducing the generation of bubbles.

[0064] The system includes an outlet 6, which is located on the side wall of the housing 1. The outlet 6 discharges the coating material, after being filtered and guided by the first return plate 3 and the second return plate 5, from the sieve box and transports it to the subsequent storage tank 300. The position and size of the outlet 6 are rationally designed based on the layout of the entire recycling system and the coating flow rate to ensure smooth discharge of the coating material without clogging.

[0065] Specifically, in the square screen box 200 of the paper coating recycling system in this embodiment, when the coating flows through the first return plate 3, the impact force of the coating is initially reduced due to the blocking effect of the bottom baffle 4, and it stays briefly at the bottom of the box 1. As the feed pipe 2 slowly transports the coating into the box 1, the coating level in the box 1 gradually rises. The raised coating passes through multiple first through holes 31 on the first return plate 3, and is divided from a large-impact fluid into numerous small-impact fluids. Because the first return plate 3 is inclined in the box 1, the flow direction of the divided coating changes from a straight flow to an oblique flow, further reducing the impact force of the coating and reducing the generation of bubbles. This reduces or avoids problems such as missed coating and increased bubble pressure points, improves the coating quality and printing performance of the paper, and increases the yield and production efficiency.

[0066] Optionally, in some embodiments, such as Figures 1 to 5 As shown, the first reflux plate 3 is obliquely embedded in the housing 1, and slots are provided on both sides of the housing 1. Each slot includes two retaining plates 11, which are symmetrically arranged at intervals. Both retaining plates 11 are fixedly connected to the housing 1 by welding or bolts. The slot structure makes the installation and removal of the first reflux plate 3 very convenient. When there are many impurities trapped on the first reflux plate 3 that require cleaning, the operator can easily remove it using the handle 32 on the top of the first reflux plate 3 for quick cleaning and maintenance, greatly improving the maintainability of the equipment.

[0067] Optionally, in some embodiments, such as Figures 1 to 5 As shown, the top of the first reflux plate 3 is provided with a handle 32, which is integrally formed with the first reflux plate 3; or in other embodiments, the handle 32 is fixedly connected to the first reflux plate 3 by welding or bolts. By providing the handle 32, operators can easily remove the first reflux plate 3 for quick cleaning and maintenance.

[0068] Optionally, in some embodiments, such as Figures 1 to 5 As shown, the tilt angle of the first reflux plate 3 is 40-50°, and the tilt angle of the baffle 4 is 40-50°. Preferably, in this embodiment, as... Figures 1 to 5As shown, the tilt angle of the first return plate 3 is 45°, and the tilt angle of the baffle 4 is 45°. By calculating and observing the flow characteristics of the fluid in the chamber 1, and by measuring the velocity and pressure of the fluid in the chamber 1 in real time, based on these measurement data, an intelligent algorithm is used for optimization analysis to determine that the optimal installation angle of the first return plate 3 and the baffle 4 is 45 degrees of oblique insertion.

[0069] Optionally, in some embodiments, such as Figures 1 to 5 As shown, a plurality of first through holes 31 are evenly distributed on the first reflux plate 3, and the diameter of the first through holes 31 is 3-7 mm. Preferably, in this embodiment, as... Figures 1 to 5 As shown, the diameter of the first through hole 31 is 3 mm to achieve the best effect of reducing the impact of the coating and reducing the generation of bubbles.

[0070] Optionally, in some embodiments, such as Figures 1 to 5 As shown, the baffle 4 is disposed at the bottom of the first return plate 3, and the left and right sides of the baffle 4 are wrapped by the first return plate 3 to achieve the best effect of reducing the impact of the paint and reducing the generation of bubbles. The baffle 4 is a solid stainless steel plate.

[0071] Optionally, in some embodiments, such as Figures 1 to 5 As shown, there are multiple feed pipes 2, which are distributed at intervals. Preferably, multiple feed pipes 2 are provided, and these feed pipes are distributed at intervals. This design allows the coating to be evenly introduced into the box 1, avoiding concentrated impact on a specific area caused by single-point feeding, thereby effectively reducing air bubbles generated by fluid impact. Simultaneously, the diameter and number of feed pipes 2 can be rationally designed and adjusted according to the flow rate and pressure of the coating in actual production to ensure that the coating can enter the screen box smoothly and steadily. In this embodiment, there are four feed pipes 2.

[0072] Specifically, in this embodiment, such as Figures 1 to 5As shown, the square sieve box 200 also includes a second reflux plate 5. The first reflux plate 3 is disposed on the side near the feed pipe 2. The second reflux plate 5 is vertically disposed at 90° inside the box body 1, on the side away from the feed pipe 2. The second reflux plate 5 is spaced apart from the first reflux plate 3, and a plurality of second through holes 51 are evenly distributed on the second reflux plate 5. When the second reflux plate 5 is provided, after the coating is initially filtered and guided by the first reflux plate 3, the impact force of the coating is initially reduced. Then the coating flows laterally through the second reflux plate 5. The second through holes 51 on the second reflux plate 5 can perform secondary vertical filtration of the coating, further intercepting the fine impurities remaining in the coating and improving the purity of the coating. At the same time, the setting of the second reflux plate 5 extends the flow path and residence time of the coating in the sieve box, which helps to more fully eliminate air bubbles in the coating and improve the quality of the recovered coating.

[0073] Specifically, in the square screen box 200 of the paper coating recycling system in this embodiment, when the coating flows through the first return plate 3, the impact force of the coating is initially reduced due to the obstruction of the bottom baffle 4, and it stays briefly at the bottom of the box 1. As the feed pipe 2 slowly transports the coating into the box 1, the coating level in the box 1 gradually rises. The raised coating passes through multiple first through holes 31 on the first return plate 3, and is divided from a large-impact fluid into numerous small-impact fluids. Because the first return plate 3 is set at a 45° angle in the box 1, the flow direction of the divided coating changes from a straight flow to an oblique flow, further reducing the impact force of the coating and reducing the generation of bubbles. The multiple first through holes 31 also perform preliminary filtration of the coating, intercepting larger impurity particles in the coating, such as fiber bundles and clumps of pigment. Then the coating flows horizontally through the second return plate 5. The second through holes 51 on the second return plate 5 can perform secondary filtration of the coating in the vertical direction, further intercepting the fine impurities remaining in the coating and improving the purity of the coating. Meanwhile, the second return plate 5 extends the flow path and residence time of the coating in the screen box, which helps to eliminate air bubbles in the coating more fully, thereby reducing or avoiding problems such as missed coating and increased air bubble pressure points, improving the coating quality and printing performance of the paper, increasing the yield and production efficiency.

[0074] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A square sieve box for a paper coating recycling system, characterized in that, include: Box; A feed pipe is disposed on the side wall of the housing; The first reflux plate is inclinedly disposed in the box, and the first reflux plate is provided with a plurality of first through holes; A baffle is disposed at the bottom of the first reflux plate. The baffle is integrally formed or fixedly connected to the first reflux plate. The baffle is disposed at an angle inside the box. And a discharge port, which is located on the side wall of the box.

2. The square screen box of the paper coating recycling system according to claim 1, characterized in that: The first reflux plate is embedded at an angle into the housing, and slots are provided on both sides of the housing. The slot includes two card plates, which are symmetrically arranged at intervals and both card plates are fixedly connected to the box body.

3. The square screen box of the paper coating recycling system according to claim 1, characterized in that: The tilt angle of the first reflux plate is 40-50°, and the tilt angle of the baffle is 40-50°.

4. The square screen box of the paper coating recycling system according to claim 1, characterized in that: The top of the first reflux plate is provided with a handle, which is integrally formed with or fixedly connected to the first reflux plate.

5. The square sieve box of the paper coating recycling system according to claim 1, characterized in that: Multiple first through holes are evenly distributed on the first reflux plate, and the diameter of the first through holes is 3-7 mm.

6. The square screen box of the paper coating recycling system according to claim 1, characterized in that: The baffle is disposed at the bottom of the first reflux plate, and the left and right sides of the baffle are wrapped by the first reflux plate.

7. The square screen box of the paper coating recycling system according to claim 1, characterized in that: There are multiple feed pipes, which are distributed at intervals.

8. The square screen box of the paper coating recycling system according to any one of claims 1 to 7, characterized in that: The square screen box also includes a second reflux plate. The first reflux plate is disposed on the side close to the feed pipe. The second reflux plate is vertically disposed in the box body and disposed on the side away from the feed pipe. The second reflux plate is spaced apart from the first reflux plate. The second reflux plate is provided with a plurality of second through holes.

9. A paper coating recycling system, characterized in that: The square screen box of the paper coating recycling system as described in any one of claims 1 to 8 above.

10. The paper coating recycling system according to claim 9, characterized in that, The paper coating recycling system also includes: The material tray is connected to the square screen box of the paper coating recycling system via a pipe, and the material tray is used to receive coating. And a storage tank, which is connected to the square screen box of the paper coating recycling system via a pipeline, and the storage tank is used to store coatings.

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