Broken paper beating equipment for improving interlayer binding force of white cardboard

Abstract

The utility model discloses broken paper beating equipment for improving interlayer binding force of white cardboards. The broken paper beating equipment comprises a cone mill feeding pump; the first cone mill comprises a first abrasive disc of which the tooth width is not greater than 2.5 mm; the second cone mill comprises a second abrasive disc with the tooth width not larger than 2.5 mm; the pipeline group comprises a first feeding pipe, a second feeding pipe, a first discharging pipe, a second discharging pipe and an adapter pipe; the first feeding pipe is connected with a discharging opening of the cone mill feeding pump and a feeding opening of the first cone mill; the second feeding pipe is connected with a discharging opening of the cone mill feeding pump and a feeding opening of the second cone mill and is provided with a feeding valve; the first discharge pipe is connected with a discharge port of the first cone mill and is provided with a discharge valve; the second discharge pipe is connected with a discharge hole of the second cone mill; and the adapter pipe is connected with the discharge port of the first cone mill and the feed port of the second cone mill, and is provided with an adapter valve. The utility model has the advantages that the freeness of broken paper can be reduced, the interlayer combination of core layers is ensured, and the consumption of chemical auxiliary materials is reduced.

Description

Technical Field

[0001] This application relates to the technical field of white cardboard production, and particularly relates to a waste paper pulping device for improving the interlayer bonding strength of white cardboard. Background Art

[0002] White cardboard is usually used in fields such as high-grade printed matter, high-grade gift boxes, and book covers. The bonding strength of the paper directly affects the quality and service life of the cardboard. Therefore, the interlayer bonding strength of the paper is a very important quality index during the production process.

[0003] The interlayer bonding strength of the paper mainly depends on the interlayer bonding index of the core layer. Generally, the factors affecting the interlayer bonding index of the core layer are: 1. The interlayer bonding of chemimechanical pulp; 2. The dosage of chemical additives added to the core layer (including dry strength agents and cationic starch); 3. The dosage of bleached softwood pulp; 4. The freeness of waste paper, especially when producing white cardboard with a high grammage (300 - 400 g).

[0004] In the current production process, the ratio of the core layer is: 13% - 25% waste paper, 5% bleached softwood pulp, 82% - 70% chemimechanical pulp; the dosage of chemical additives is: 25 - 35 kg / t of dry strength agent, 15 - 17 kg / t of cationic starch; the freeness of waste paper is: 250 - 300 CFS. In production, the dosage of chemical additives is large, and the original process flow of waste paper pulping only has a parallel mode. The freeness of waste paper can only reach 250 - 300 CFS, and sometimes it cannot meet the requirement of improving the interlayer bonding of the formed paper core layer. The cost of bleached softwood pulp is high. Utility Model Content

[0005] Therefore, it is necessary to provide a waste paper pulping device for improving the interlayer bonding strength of white cardboard to solve the problems in the prior art, such as high freeness of waste paper in the waste paper pulping process flow, large dosage of bleached softwood pulp, unstable interlayer bonding of the paper core layer, and high cost.

[0006] To achieve the above object, the inventor provides a waste paper pulping device for improving the interlayer bonding strength of white cardboard, including:

[0007] A conical refiner feed pump;

[0008] A first conical refiner, the first conical refiner includes a first grinding disc, and the tooth width of the first grinding disc is not greater than 2.5 mm;

[0009] A second conical refiner, the second conical refiner includes a second grinding disc, and the tooth width of the second grinding disc is not greater than 2.5 mm;

[0010] Pipe group, the pipe group includes a first feed pipe, a second feed pipe, a first discharge pipe, a second discharge pipe and a transfer pipe; the first feed pipe is connected to the discharge port of the cone mill feed pump and the feed port of the first cone mill; the second feed pipe is connected to the discharge port of the cone mill feed pump and the feed port of the second cone mill, and a feed valve is provided on the second feed pipe; the first discharge pipe is connected to the discharge port of the first cone mill, and a discharge valve is provided at the feed port of the first discharge pipe; the second discharge pipe is connected to the discharge port of the second cone mill; the transfer pipe is connected to the discharge port of the first cone mill and the feed port of the second cone mill, and a transfer valve is provided on the transfer pipe.

[0011] In some embodiments, two feed valves are provided on the second feed pipe, and the two feed valves are respectively provided at the feed port and the discharge port of the second feed pipe.

[0012] In some embodiments, two transfer valves are provided on the transfer pipe, and the two transfer valves are respectively provided at the feed port and the discharge port of the transfer pipe.

[0013] In some embodiments, the pipe group further includes a total feed pipe, and the discharge port of the cone mill feed pump is connected to the first feed pipe and the second feed pipe through the total feed pipe.

[0014] In some embodiments, the feed valve, the discharge valve, and the transfer valve are all electrically controlled valves.

[0015] In some embodiments, the electrically controlled valve is a pneumatic switch valve.

[0016] In some embodiments, it further includes:

[0017] A controller, the controller is electrically connected to the electrically controlled valve.

[0018] In some embodiments, the tooth width of the first grinding disc is 2.5 mm.

[0019] In some embodiments, the tooth width of the second grinding disc is 2.5 mm.

[0020] Different from the prior art, for the waste paper pulping equipment for improving the interlayer bonding strength of white cardboard, the tooth widths of the first grinding disc of the first conical refiner and the second grinding disc of the second conical refiner are both not greater than 2.5 mm to improve the grinding accuracy of waste paper. Through fine grinding of the waste paper, the freeness of the waste paper is reduced from 250 CFS - 300 CFS to 180 CFS, thereby greatly improving the interlayer bonding of the waste paper, further improving the interlayer bonding of the core layer. Therefore, the dosage of bleached softwood pulp in the core layer can be reduced, the interlayer bonding index can be further ensured, and the production cost can be reduced. In addition, by setting up the pipeline group and the equipped valves, the parallel working mode of the first conical refiner and the second conical refiner can be realized, and the series working mode of the first conical refiner and the second conical refiner can also be realized. Different waste paper pulping modes can be arbitrarily switched according to production requirements to control the freeness of waste paper according to actual production needs.

[0021] The above description of the utility model content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then to be implemented according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features and advantages of this application more easily understood, the following is described in conjunction with the specific embodiments of this application and the drawings. Brief Description of the Drawings

[0022] The drawings are only used to illustrate the principles, implementation methods, applications, features and effects of the specific embodiments of this application and other related contents, and should not be considered as a limitation to this application.

[0023] In the accompanying drawings of the specification:

[0024] Figure 1 It is a connection diagram of the existing waste paper pulping equipment described in the specific embodiment;

[0025] Figure 2 It is a connection diagram of the waste paper pulping equipment for improving the interlayer bonding strength of white cardboard described in the specific embodiment;

[0026] Figure 3 It is a connection diagram of another waste paper pulping equipment for improving the interlayer bonding strength of white cardboard described in the specific embodiment;

[0027] Figure 4 It is an operation diagram of the parallel control mode of the waste paper pulping equipment for improving the interlayer bonding strength of white cardboard described in the specific embodiment;

[0028] Figure 5 It is an operation diagram of the series control mode of the waste paper pulping equipment for improving the interlayer bonding strength of white cardboard described in the specific embodiment;

[0029] Figure 6Structural diagram of the first conical mill (second conical mill) described in the specific implementation manner;

[0030] Figure 7 Structural diagram of the first grinding disc (second grinding disc) described in the specific implementation manner;

[0031] The descriptions of the reference numerals involved in the above-mentioned respective drawings are as follows:

[0032] 1. Conical mill feed pump;

[0033] 2. First conical mill; 200. First grinding disc; 201. Feed inlet; 202. Discharge outlet; 203. Gearbox; 204. Main motor;

[0034] 3. Second conical mill; 300. Second grinding disc;

[0035] 4. First feed pipe;

[0036] 5. Second feed pipe;

[0037] 500. Feed valve;

[0038] 6. First discharge pipe;

[0039] 600. Discharge valve;

[0040] 7. Second discharge pipe;

[0041] 8. Adapter pipe;

[0042] 800. Adapter valve;

[0043] 9. Total feed pipe;

[0044] 10. First connecting pipe;

[0045] 11. Second connecting pipe. Specific implementation manner

[0046] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of this application, etc., the following is a detailed description in conjunction with the listed specific embodiments and with reference to the drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, and therefore are only examples and cannot be used to limit the protection scope of this application.

[0047] References to "embodiments" in this application mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0048] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0049] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: the existence of A, the existence of B, and the simultaneous existence of A and B. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0050] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships between these entities or operations.

[0051] Without further limitation, in this application, the use of "including", "comprising", "having", or other similar expressions in a statement is intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product that includes the said elements, so that a process, method, or product that includes a series of elements may include not only those defined elements, but also other elements that are not explicitly listed, or elements that are inherent to such a process, method, or product.

[0052] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the recited number; expressions such as "above", "below", "within", etc. are understood to include the recited number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0053] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the attached drawings. It is only for the convenience of describing the specific embodiments of the present application or facilitating the understanding of the reader, rather than indicating or implying 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, it should not be construed as a limitation to the embodiments of the present application.

[0054] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the "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 directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0055] White cardboard is usually used in the fields of high-grade printed matter, high-grade gift boxes, book covers, etc. The bonding strength of the paper will directly affect the quality and service life of the cardboard. Therefore, the interlayer bonding strength of the paper is a very important quality index during the production process.

[0056] The interlayer bonding strength of the paper mainly depends on the interlayer bonding index of the core layer. Generally, the factors affecting the interlayer bonding index of the core layer are: 1. The interlayer bonding of the chemical mechanical pulp, 2. The dosage of chemical auxiliary materials added to the core layer (including dry strength agents, cationic starch), 3. The dosage of bleached softwood pulp, 4. The high or low freeness of the broke, especially when producing white cardboard with a high grammage (300 - 400 grams).

[0057] In the current production process, the ratio of the core layer is: 13% - 25% broke, 5% bleached softwood pulp, 82% - 70% chemical mechanical pulp; the dosage of chemical auxiliary materials is: 25 - 35 kg / t of dry strength agent, 15 - 17 kg / t of cationic starch; the freeness of the broke is: 250 - 300 CFS. The dosage of chemical auxiliary materials is large in production. Please refer to Figure 1 , the original process flow of the broke beating only has a parallel mode, that is, the first conical refiner 2 and the second conical refiner 3 work in parallel, and the freeness of the broke can only reach 250 - 300 CFS. Sometimes it cannot meet the requirement of improving the interlayer bonding of the formed paper core layer, and the cost of bleached softwood pulp is high.

[0058] To this end, the present utility model provides a waste paper pulping device for improving the interlayer bonding force of white cardboard, which is used for waste paper pulping, especially for the production of high-grammage white cardboard (300-400 grams). It can optimize the original waste paper pulping process, reduce the consumption of bleached softwood pulp in the core layer while ensuring the interlayer bonding of the core layer, replace the bleached softwood pulp with chemi-thermomechanical pulp, save costs, ensure sufficient processing capacity, and meet the process requirements of the equipment.

[0059] Please refer to Figure 2 , in a specific embodiment, the waste paper pulping device for improving the interlayer bonding force of white cardboard includes a conical refiner feed pump 1, a first conical refiner 2, a second conical refiner 3, and a pipeline group; the first conical refiner 2 includes a first grinding disc 200, and the tooth width of the first grinding disc 200 is not greater than 2.5 mm; the second conical refiner 3 includes a second grinding disc 300, and the tooth width of the second grinding disc 300 is not greater than 2.5 mm; the pipeline group includes a first feed pipe 4, a second feed pipe 5, a first discharge pipe 6, a second discharge pipe 7, and a transfer pipe 8; the first feed pipe 4 connects the discharge port of the conical refiner feed pump 1 and the feed port 201 of the first conical refiner 2; the second feed pipe 5 connects the discharge port of the conical refiner feed pump 1 and the feed port 201 of the second conical refiner 3, and the second feed pipe 5 is provided with a feed valve 500; the first discharge pipe 6 is connected to the discharge port 202 of the first conical refiner 2, and the feed port of the first discharge pipe 6 is provided with a discharge valve 600; the second discharge pipe 7 is connected to the discharge port 202 of the second conical refiner 3; the transfer pipe 8 connects the discharge port 202 of the first conical refiner 2 and the feed port 201 of the second conical refiner 3, and the transfer pipe 8 is provided with a transfer valve 800.

[0060] Please refer to Figure 6 , the first conical refiner (second conical refiner) feeds through the feed port 201 and discharges through the discharge port 202. The main motor 204 is drivingly connected to the first grinding disc 200 (second grinding disc 300) through a gearbox 203, and the first grinding disc 200 (second grinding disc 300) is driven by the main motor 204 for grinding.

[0061] Since the tooth widths of the first grinding disc 200 of the first conical refiner 2 and the second grinding disc 300 of the second conical refiner 3 are both no more than 2.5 mm, the tooth shape of the waste paper conical refiner grinding disc is changed, thus improving the grinding accuracy of the waste paper. Through fine grinding of the waste paper, the freeness of the waste paper is reduced from 250 CFS - 300 CFS to 180 CFS, thereby greatly improving the interlayer bonding of the waste paper, and thus improving the interlayer bonding of the core layer. Therefore, the amount of bleached softwood pulp in the core layer can be reduced, the interlayer bonding index can be further ensured, and the production cost can be reduced. In addition, by setting up the pipeline group and the equipped valves, the original process of the waste paper conical refiner is changed. From the parallel process of 2 units, the pipelines and pneumatic valves are designed to be able to be in parallel or in series. The parallel working mode of the first conical refiner 2 and the second conical refiner 3 can be realized, and the series working mode of the first conical refiner 2 and the second conical refiner 3 can also be realized. Different waste paper beating modes can be arbitrarily switched according to the production requirements to control the freeness of the waste paper according to the actual production requirements.

[0062] If the parallel working mode is required, open the feed valve 500, open the discharge valve 600, and close the transfer valve 800; if the series working mode is required, close the feed valve 500, close the discharge valve 600, and open the transfer valve 800.

[0063] After actually applying the waste paper beating equipment that improves the interlayer bonding force of white cardboard, the core layer ratio is: 13% - 25% waste paper, 87% - 75% chemi-thermomechanical pulp; the dosage of chemical auxiliary materials is: 25 - 35 kg / t of dry strength agent, 15 - 17 kg / t of cationic starch; the freeness of the waste paper is: 180 - 300 CFS. Under the condition of ensuring the interlayer bonding of the core layer, the amount of bleached softwood pulp in the core layer is reduced, and chemi-thermomechanical pulp is used instead of bleached softwood pulp, saving costs.

[0064] Please refer to Figure 7 , in some embodiments, the tooth width of the first grinding disc 200 is 2.5 mm, then the waste paper can be finely ground, the freeness can be reduced, the interlayer bonding of the waste paper can be improved, thereby improving the interlayer bonding of the core layer and reducing the amount of bleached softwood pulp in the core layer.

[0065] Please refer to Figure 7 , in some embodiments, the tooth width of the second grinding disc 300 is 2.5 mm, then the waste paper can be further finely ground, the freeness can be reduced to 180 CFS, the interlayer bonding of the waste paper can be improved, thereby improving the interlayer bonding of the core layer and reducing the amount of bleached softwood pulp in the core layer.

[0066] Please refer to Figure 3, in some embodiments, the second feed pipe 5 is provided with two feed valves 500, and the two feed valves 500 are respectively arranged at the feed port and the discharge port of the second feed pipe 5. By controlling the feed port and the discharge port of the second feed pipe 5 with the two feed valves 500 respectively, it is possible to prevent the slurry from flowing into the second feed pipe 5 when the second feed pipe 5 is not needed, ensuring that the slurry can flow into the second feed pipe 5 only in the parallel working mode.

[0067] Please refer to Figure 3 , in some embodiments, the adapter pipe 8 is provided with two adapter valves 800, and the two adapter valves 800 are respectively arranged at the feed port and the discharge port of the adapter pipe 8. By controlling the feed port and the discharge port of the adapter pipe 8 with the two adapter valves 800 respectively, it is possible to prevent the slurry from flowing into the adapter pipe 8 when the adapter pipe 8 is not needed, ensuring that the slurry can flow into the adapter pipe 8 only in the series working mode.

[0068] In some embodiments, the pipe group further includes a main feed pipe 9. The discharge port of the conical mill feed pump 1 is connected to the first feed pipe 4 and the second feed pipe 5 through the main feed pipe 9, so that the first feed pipe 4 and the second feed pipe 5 can be commonly connected to the discharge port of the conical mill feed pump 1, achieving the effect of one connecting to two.

[0069] In some embodiments, the pipe group further includes a first connecting pipe 10. The discharge port of the first conical mill 2 is connected to the first discharge pipe 6 and the adapter pipe 8 through the first connecting pipe 10, so that the first discharge pipe 6 and the adapter pipe 8 can be commonly connected to the discharge port of the first conical mill 2, achieving the effect of one connecting to two.

[0070] Similarly, in some embodiments, the pipe group further includes a second connecting pipe 11. The feed port of the second conical mill 3 is connected to the second feed pipe 5 and the adapter pipe 8 through the second connecting pipe 11, so that the second feed pipe 5 and the adapter pipe 8 can be commonly connected to the discharge port of the second conical mill 3, achieving the effect of one connecting to two.

[0071] The feed valve 500, the discharge valve 600, and the adapter valve 800 can be manual valves, and the mode switching is realized through manual operation. For more convenience, in some embodiments, the feed valve 500, the discharge valve 600, and the adapter valve 800 are all electrically controlled valves.

[0072] In some embodiments, the electrically controlled valve is a pneumatic switch valve.

[0073] In some embodiments, a controller is further included, and the controller is electrically connected to the electrically controlled valve.

[0074] In some embodiments, the controller is provided with a control program, which includes a parallel control mode and a series control mode. By operating the controller, one-key switching between the series control mode and the parallel control mode can be achieved, without the need to control each valve one by one. Specifically,

[0075] Please refer to Figure 4 , the parallel control mode is: the feed valve 500 is opened, the discharge valve 600 is opened, and the transfer valve 800 is closed;

[0076] Please refer to Figure 5 , the series control mode is: the feed valve 500 is closed, the discharge valve 600 is closed, and the transfer valve 800 is opened.

[0077] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the substantial concept of the present application and using the content recorded in the text and drawings of the specification of the present application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A broken paper beating device for improving the bonding strength between white cardboard layers, characterized in that: include: Cone mill feed pump; A first cone mill, the first cone mill comprising a first grinding plate, and a tooth width of the first grinding plate is not greater than 2.5 mm; A second cone mill, the second cone mill comprising a second grinding plate, and a tooth width of the second grinding plate is not greater than 2.5 mm; A pipeline group, the pipeline group includes a first feed pipe, a second feed pipe, a first discharge pipe, a second discharge pipe and a transfer pipe; the first feed pipe connects the discharge port of a cone mill feed pump and the feed port of a first cone mill; the second feed pipe connects the discharge port of a cone mill feed pump and the feed port of a second cone mill, and the second feed pipe is provided with a feed valve; the first discharge pipe is connected to the discharge port of the first cone mill, and the feed port of the first discharge pipe is provided with a discharge valve; the second discharge pipe is connected to the discharge port of the second cone mill; the transfer pipe connects the discharge port of the first cone mill and the feed port of the second cone mill, and the transfer pipe is provided with a transfer valve.

2. The broken paper beating device for improving the bonding strength between white cardboard layers according to claim 1 is characterized in that: The second feed pipe is provided with two feed valves, and the two feed valves are respectively arranged at the feed inlet of the second feed pipe and the discharge outlet of the second feed pipe.

3. The broken paper beating device for improving the bonding strength between white cardboard layers according to claim 1, characterized in that: The transfer tube is provided with two transfer valves, and the two transfer valves are respectively arranged at the feed inlet and the discharge outlet of the transfer tube.

4. The broken paper beating device for improving the bonding strength between white cardboard layers according to claim 1, characterized in that: The pipeline group also includes a main feed pipe, and the discharge port of the cone mill feed pump is connected with the first feed pipe and the second feed pipe through the main feed pipe.

5. The broken paper beating device for improving the bonding strength between white cardboard layers according to any one of claims 1 to 3, characterized in that: The feed valve, discharge valve and transfer valve are all electrically controlled valves.

6. The broken paper beating device for improving the bonding strength between white cardboard layers according to claim 5 is characterized in that: The electrically controlled valve is a pneumatic switch valve.

7. The broken paper beating device for improving the bonding strength between white cardboard layers according to claim 5, characterized in that: Also includes: A controller is electrically connected to the electric-controlled valve.

8. The broken paper beating device for improving the bonding strength between white cardboard layers according to claim 1, characterized in that: The tooth width of the first grinding disc is 2.5 mm.

9. The broken paper beating device for improving the bonding strength between white cardboard layers according to claim 1, characterized in that: The tooth width of the second grinding disc is 2.5 mm.

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