Surface layer paper pulp mixing assembly and papermaking system

Abstract

The utility model discloses a surface layer paper pulp preparation assembly and a papermaking system, the surface layer paper pulp preparation assembly comprises a surface layer white water pool, an external white water tank, and a surface layer pulp forming tower, a pulping machine, a pulp preparation tank and a paper machine which are communicated in sequence, and a dye feeding port is also arranged at the communication part of the pulp preparation tank and the paper machine; a water outlet of the surface layer white water pool is communicated with the external white water tank, the communication position of the pulp preparing tank and the paper machine is further communicated with a water outlet of the external white water tank, and white water discharged after dehydration treatment is conducted on the net layer face of the paper machine is collected by the surface layer white water pool. The surface layer pulping tower, the pulping machine and the pulp preparing tank are all communicated with a water outlet of the surface layer white water tank, so that white water at the surface part of a net layer can be independently collected and intensively utilized in the production of surface layer paper, the white water containing dye collected by the surface layer white water tank is only applied in the production of the surface layer paper, the waste of the dye is not caused, and the production cost is reduced. Therefore, the papermaking cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of papermaking technology, and in particular relates to a surface paper pulping assembly and papermaking system. Background Technology

[0002] In the manufacturing process of kraft paper, dyes are needed in the surface layer of the paper, while no dyes are needed in the bottom layer. Currently, the white water from the top and bottom of the wire layer of the paper machine is mostly collected and reused in a mixed manner. This white water contains dyes, and a large amount of this white water will be reused at the bottom of the wire layer later, which will lead to waste of dyes and increase the cost of papermaking. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a surface paper pulping assembly that can save dye usage.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A surface paper pulping assembly includes a surface white water tank, an external white water tank, and a surface pulping tower, a refiner, a pulping tank, and a paper machine connected in sequence. A dye addition port is also provided at the connection between the pulping tank and the paper machine. The outlet of the surface white water tank is connected to the external white water tank. The connection between the pulping tank and the paper machine is also connected to the outlet of the external white water tank. The white water discharged from the wire surface of the paper machine after dewatering is collected by the surface white water tank. The surface pulping tower, refiner, and pulping tank are all connected to the outlet of the surface white water tank.

[0005] The beneficial effects of the above technical solution are as follows: the white water from the wire surface can be collected separately and used in the production of the surface paper. This ensures that the white water containing dye collected in the surface white water pool is only used in the production of the surface paper, thus avoiding waste of dye and reducing papermaking costs.

[0006] The surface slurry forming tower and slurry mixing tank described in the above technical solution are both equipped with agitators.

[0007] The beneficial effect of the above technical solution is that it ensures that the solutions in the surface slurry tower and the slurry mixing tank are fully mixed.

[0008] The above technical solution includes multiple slurry mixing tanks, which are connected in parallel.

[0009] The beneficial effect of the above technical solution is that it enables multiple pulp mixing tanks to operate alternately to achieve continuous operation of the paper machine.

[0010] The above technical solution includes three mixing tanks.

[0011] The beneficial effect of the above technical solution is that two mixing tanks can be operated alternately, while the remaining mixing tank can be used as a backup.

[0012] In the above technical solution, a first slurry pump is provided at the connection between the surface slurry tower and the refining machine.

[0013] The beneficial effects of the above technical solution are that the slurry in the surface layer slurry tower can be supplied to the refiner by the first slurry pump, and at the same time, it also provides feed pressure to the refiner.

[0014] In the above technical solution, a second pulp pump is provided at the connection between the pulp mixing tank and the paper machine.

[0015] The beneficial effect of the above technical solution is that it enables the pulp in the pulp mixing tank to be stably supplied to the paper machine by the second pulp pump.

[0016] The above technical solution also includes a dye preparation component, which has an inlet and an outlet. The outlet of the dye preparation component is connected to the dye addition port, and the inlet of the dye preparation component is connected to the outlet of the surface white water pool.

[0017] The beneficial effect of the above technical solution is that the dye can be pre-prepared into a solution by the dye preparation component and then fed into the pulp.

[0018] In the above technical solution, a first valve is provided at the connection point between the outlet of the surface white water tank and the external white water tank, the surface slurry tower, the pulp mill, the slurry mixing tank and the dye preparation component.

[0019] The beneficial effect of the above technical solution is that the dye is dissolved using the white water in the surface white water pool, thereby reducing the amount of clean water used.

[0020] The dye preparation component described in the above technical solution includes a stirring tank and a flow pump. The stirring tank has a water inlet and a dye inlet. The inlet of the flow pump is connected to the inside of the stirring tank. The outlet of the flow pump constitutes the outlet of the dye preparation component, and the water inlet of the stirring tank constitutes the inlet of the dye preparation component.

[0021] The advantages of the above technical solution are that it has a simple structure and enables the dye solution to be stably supplied to the pulp.

[0022] The second objective of this invention is to provide a papermaking system with a simple structure and reduced costs.

[0023] To achieve the above objectives, another technical solution of this utility model is as follows: a papermaking system, including the surface paper pulping assembly as described above.

[0024] The advantages of the above technical solution are that it has a simple structure and can reduce papermaking costs. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of the surface paper pulping assembly described in this utility model embodiment.

[0026] Figure 2 This is a second schematic diagram of the surface paper pulping assembly described in this embodiment of the present invention;

[0027] Figure 3 This is the third structural schematic diagram of the surface paper pulping assembly described in this utility model embodiment. In the diagram: 1. Surface white water tank; 2. External white water tank; 3. Surface pulping tower; 4. Refiner; 5. Pulp mixing tank; 6. Paper machine; 7. Agitator; 81. First pulp pump; 82. Second pulp pump; 83. First valve; 84. Second valve; 9. Dye preparation unit; 91. Mixing tank; 92. Flow pump. Detailed Implementation

[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will be more clearly described in light of the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0029] Example 1

[0030] like Figure 1 As shown, this embodiment provides a surface paper pulping assembly, including a surface white water tank 1, an external white water tank 2, and a surface pulping tower 3, a refiner 4, a pulping tank 5, and a paper machine 6 connected in sequence. A dye inlet is also provided at the connection between the pulping tank 5 and the paper machine 6. Figure 1 and Figure 2 (Point A is the dye addition port). The outlet of the surface white water tank 1 is connected to the external white water tank 2. The connection between the pulp mixing tank 5 and the paper machine 6 is also connected to the outlet of the external white water tank 2. The white water discharged from the wire surface of the paper machine 6 after dewatering is collected by the surface white water tank 1. The surface pulping tower 3, the refiner 4, and the pulp mixing tank 5 are all connected to the outlet of the surface white water tank 1. In this way, the white water from the wire surface can be collected separately and used in the production of surface paper. This ensures that the white water containing dye collected in the surface white water tank is only used in the production of surface paper, thus avoiding waste of dye and reducing papermaking costs.

[0031] like Figure 2As shown, both the surface layer slurry forming tower 3 and the slurry mixing tank 5 in the above technical solution are equipped with a stirring element 7, so that the solutions in the surface layer slurry forming tower and the slurry mixing tank can be fully mixed.

[0032] The above technical solution provides multiple pulp mixing tanks 5, and the multiple pulp mixing tanks 5 are arranged in parallel, so that the multiple pulp mixing tanks can operate alternately to achieve continuous operation of the paper machine.

[0033] The above technical solution has three slurry mixing tanks 5, so that two slurry mixing tanks can be operated alternately, while the remaining slurry mixing tank is used as a backup. In this embodiment, a second valve 84 is provided at the connection between each slurry mixing tank and the second slurry pump.

[0034] In the above technical solution, a first slurry pump 81 is provided at the connection between the surface layer slurry tower 3 and the refiner 4, so that the slurry in the surface layer slurry tower 3 can be supplied to the refiner by the first slurry pump, and at the same time, it also provides feed pressure to the refiner.

[0035] In the above technical solution, a second pulp pump 82 is provided at the connection between the pulp mixing tank 5 and the paper machine 6, so that the pulp in the pulp mixing tank is stably supplied to the paper machine by the second pulp pump.

[0036] like Figure 3 As shown, the above technical solution also includes a dye preparation component 9, which has an inlet and an outlet. The outlet of the dye preparation component 9 is connected to the dye addition port, and the inlet of the dye preparation component 9 is connected to the outlet of the surface white water pool 1. In this way, the dye can be pre-prepared into a solution through the dye preparation component and then supplied to the pulp.

[0037] In the above technical solution, the outlet of the surface white water tank 1 is provided with a first valve 83 at the connection point between the external white water tank 2, the surface pulping tower 3, the pulping machine 4, the pulp mixing tank 5 and the dye preparation component 9. This allows the dye to be dissolved using the white water in the surface white water tank, thereby reducing the amount of clean water used.

[0038] The dye preparation component 9 described in the above technical solution includes a stirring tank 91 and a flow pump 92. The stirring tank 91 has a water inlet and a dye inlet. The inlet of the flow pump 92 is connected to the inside of the stirring tank 91. The outlet of the flow pump 92 constitutes the dye preparation component 9. Its structure is simple and enables the dye solution to be stably supplied to the pulp.

[0039] This embodiment separates and recycles the white water from the top and bottom layers of paper (thus preventing the waste of residual dye in the white water). After this improvement, 0.5 kg of dye can be saved per ton of paper produced. Based on the current market price of dye at 4 yuan / kg, the cost can be reduced by about 2 yuan per ton of paper. With a daily output of several thousand tons, the cost can be reduced by several thousand yuan per day.

[0040] The paper production process for the bottom layer of the paper machine is not described in detail in this embodiment, as it can all be considered as existing technology.

[0041] Example 2

[0042] This embodiment provides a papermaking system, including the surface paper pulping assembly as described above, which has a simple structure and can reduce papermaking costs.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A surface paper pulping assembly, characterized in that, The system includes a surface white water tank (1), an external white water tank (2), a surface pulping tower (3), a refiner (4), a mixing tank (5), and a paper machine (6) connected in sequence. A dye addition port is provided at the connection between the mixing tank (5) and the paper machine (6). The outlet of the surface white water tank (1) is connected to the external white water tank (2). The connection between the mixing tank (5) and the paper machine (6) is also connected to the outlet of the external white water tank (2). The white water discharged from the wire surface of the paper machine (6) after dewatering is collected by the surface white water tank (1). The surface pulping tower (3), the refiner (4), and the mixing tank (5) are all connected to the outlet of the surface white water tank (1).

2. The surface paper pulping assembly according to claim 1, characterized in that, Both the surface layer slurry tower (3) and the slurry mixing tank (5) are equipped with agitators (7).

3. The surface paper pulping assembly according to claim 1, characterized in that, Multiple slurry mixing tanks (5) are provided, and multiple slurry mixing tanks (5) are arranged in parallel.

4. The surface paper pulping assembly according to claim 3, characterized in that, The slurry mixing tank (5) is provided in three parts.

5. The surface paper pulping assembly according to claim 1, characterized in that, A first slurry pump (81) is provided at the connection between the surface slurry tower (3) and the grinding mill (4).

6. The surface paper pulping assembly according to claim 1, characterized in that, A second pulp pump (82) is provided at the connection between the pulp mixing tank (5) and the paper machine (6).

7. The surface paper pulping assembly according to claim 1, characterized in that, It also includes a dye preparation component (9), which has an inlet and an outlet. The outlet of the dye preparation component (9) is connected to the dye addition port, and the inlet of the dye preparation component (9) is connected to the outlet of the surface white water pool (1).

8. The surface paper pulping assembly according to claim 7, characterized in that, The outlet of the surface white water tank (1) is provided with a first valve (83) at the connection point between the outlet of the surface white water tank (2), the surface pulping tower (3), the pulping machine (4), the pulp mixing tank (5) and the dye preparation component (9).

9. The surface paper pulping assembly according to claim 7, characterized in that, The dye preparation component (9) includes a stirring tank (91) and a flow pump (92). The stirring tank (91) has a water inlet and a dye inlet. The inlet of the flow pump (92) is connected to the inside of the stirring tank (91). The outlet of the flow pump (92) constitutes the outlet of the dye preparation component (9). The water inlet of the stirring tank (91) constitutes the inlet of the dye preparation component (9).

10. A papermaking system, characterized in that, Includes the surface paper pulp assembly as described in any one of claims 1-9.

Images