Four-net-stacking forming equipment for producing coated kraft linerboard

Abstract

The utility model relates to the technical field of papermaking industry, and discloses four-net-stacking forming equipment for producing coated kraft linerboards, which comprises a four-net-stacking forming device, and the lower surface of the four-net-stacking forming device is fixedly connected with a heat exchange box. Heat carried by redundant water discharged in the production process of the four-net-folding forming device exchanges heat with cold water in the heat exchange box through the S-shaped heat exchange pipe, efficient recovery of the heat is achieved, energy consumption is reduced, the water obtained after heat recovery passes through the purification box, the first containing box and the second containing box, and the water purification efficiency is improved. The multi-stage purification treatment is performed, the coarse filter screen in the first placement box can intercept large-particle impurities in water and preliminarily purify water, and the precise filter screen in the second placement box further removes fine particles and suspended solids in the water, so that the water quality is remarkably improved, and the purified water can be reused in the papermaking production process.

Description

Technical Field

[0001] The utility model relates to the technical field of the paper-making industry, and particularly relates to a four-layer wire forming device for producing coated kraft paperboard. Background Art

[0002] In the modern paper-making industry, the production of coated kraft paperboard is a highly complex and energy-consuming process. Among them, the four-layer wire forming device, as one of the core links, undertakes the important task of forming the basic structure of the paper. Through the cooperation of multiple wire parts, the pulp gradually forms a uniform and dense paper structure during the dehydration process. In this process, a large amount of water is separated from the pulp.

[0003] Due to multiple steps in the papermaking process, such as the preparation of pulp, the forming and drying of paper, etc., which need to be carried out at a relatively high temperature, the heat requirements in these steps are usually met by steam or other heating media. Therefore, the water separated from the pulp often carries a considerable amount of heat. If this heat-containing water is directly discharged, it will not only cause waste of energy, but also increase the cost of cooling and treating these wastewaters. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a four-layer wire forming device for producing coated kraft paperboard.

[0005] The utility model is realized by the following technical solutions: A four-layer wire forming device for producing coated kraft paperboard includes a four-layer wire forming device. The lower surface of the four-layer wire forming device is fixedly connected with a heat exchange box. The upper surface of the heat exchange box is provided with a water accumulation tank. The middle of the inner bottom wall of the water accumulation tank is provided with a conical flow hole. The upper surface of the heat exchange box is fixedly connected with a filling pipe. The inner wall of the heat exchange box is fixedly connected with a serpentine heat exchange pipe.

[0006] Through the above technical solutions, heat exchange is carried out by using the serpentine heat exchange pipe, which can effectively recover the heat in the excess water discharged from the paper. This not only reduces the waste of energy, but also can preheat the water for subsequent processes, reducing the production cost. Through the design of the water accumulation tank and the conical flow hole, it can ensure that the water flows into the heat exchange box quickly and smoothly, accelerating the discharge process of the water and improving the efficiency of the entire production process.

[0007] As a further improvement of the above solution, a liquid level observation window is arranged at the front end of the heat exchange box. The lower surface of the heat exchange box is fixedly connected with a purification box. The bottom end of the serpentine heat exchange pipe is arranged inside the purification box.

[0008] Through the above technical solution, the setting of the purification tank can further purify the water after passing through the serpentine heat exchange tube. This can not only remove impurities in the water, but also ensure the quality of the recycled water, extend the service life of the equipment, and reduce the impact on the environment.

[0009] As a further improvement of the above solution, a first sliding groove is opened on the inner wall of the purification tank, a first sliding block is slidably connected inside the first sliding groove, and a first placement box is fixedly connected to the surface of the first sliding block.

[0010] Through the above technical solution, the sliding connection design of the first sliding groove and the first sliding block enables the first placement box to be conveniently pulled out and pushed back, facilitating the operator to clean and maintain it regularly.

[0011] As a further improvement of the above solution, a coarse filter screen is arranged on the inner bottom wall of the first placement box.

[0012] Through the above technical solution, the coarse filter screen can effectively intercept large particle impurities in the water, such as paper scraps and fibers, preventing these impurities from entering the subsequent purification system, thereby protecting the normal operation of the system.

[0013] As a further improvement of the above solution, a second sliding groove is opened on the inner wall of the purification tank, a second sliding block is slidably connected inside the second sliding groove, and a second placement box is fixedly connected to the outer surface of the second sliding block.

[0014] As a further improvement of the above solution, a fine filter screen is arranged on the inner bottom wall of the second placement box.

[0015] Through the above technical solution, the fine filter screen can effectively remove fine particles and suspended substances in the water, further improving the water purification effect. After being filtered by the fine filter screen, the tiny impurities in the water are effectively removed, thereby ensuring that the quality of the finally discharged or recycled water meets the required standards.

[0016] As a further improvement of the above solution, auxiliary handles are fixedly connected to the front ends of the first placement box and the second placement box.

[0017] Through the above technical solution, the operator can easily pull out or push in the first placement box and the second placement box by holding the auxiliary handle. The fixed connection of the auxiliary handle ensures its stability and reliability during the operation. During daily maintenance, the operator only needs to hold the auxiliary handle, gently pull out the placement box, clean or replace the filter screen, and then push it back to its original position.

[0018] As a further improvement of the above solution, support feet are fixedly connected to the four corners of the lower surface of the purification tank.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] By providing a serpentine heat exchange tube, the present utility model exchanges heat between the heat carried by the excess water discharged during the production process of the four - layer wire forming device and the cold water inside the heat exchange box, achieving efficient heat recovery, reducing energy consumption. After heat recovery, the water is further purified through a purification box, as well as the first placement box and the second placement box therein. The coarse filter screen in the first placement box can intercept large - particle impurities in the water, preliminarily purifying the water quality. The precision filter screen in the second placement box further removes fine particles and suspended substances in the water, significantly improving the water quality and ensuring that the purified water can be reused in the papermaking production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of the structure of the conical flow hole of the present utility model;

[0023] Figure 3 is a schematic diagram of the structure of the serpentine heat exchange tube of the present utility model;

[0024] Figure 4 is a schematic diagram of the structure of the coarse filter screen of the present utility model;

[0025] Figure 5 is an exploded schematic diagram of the precision filter screen of the present utility model.

[0026] MAIN SYMBOL DESCRIPTION:

[0027] 1. Four - layer wire forming device; 2. Heat exchange box; 3. Water accumulation tank; 4. Conical flow hole; 5. Filling pipe; 6. Serpentine heat exchange tube; 7. Liquid level observation window; 8. Purification box; 9. First chute; 10. First slider; 11. First placement box; 12. Coarse filter screen; 13. Second chute; 14. Second slider; 15. Second placement box; 16. Precision filter screen; 17. Auxiliary handle; 18. Support feet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, in combination with the drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be combined with each other arbitrarily to form new embodiments. Embodiment

[0029] Please refer to Figures 1-5, A four - layer wire forming device for producing coated kraft paper in this embodiment includes a four - layer wire forming device 1. A heat exchange box 2 is fixedly connected to the lower surface of the four - layer wire forming device 1. A water accumulation tank 3 is opened on the upper surface of the heat exchange box 2. A conical flow hole 4 is opened in the middle of the inner bottom wall of the water accumulation tank 3. A filling pipe 5 is fixedly connected to the upper surface of the heat exchange box 2. A serpentine heat exchange pipe 6 is fixedly connected to the inner wall of the heat exchange box 2. During the production process of the four - layer wire forming device 1, the excess water in the paper is discharged into the serpentine heat exchange pipe 6 inside the heat exchange box 2 through the conical flow hole 4. In the serpentine heat exchange pipe 6, this water containing heat exchanges heat with the cold water inside the heat exchange box 2 to achieve heat recovery.

[0030] A liquid level observation window 7 is provided at the front end of the heat exchange box 2. A purification box 8 is fixedly connected to the lower surface of the heat exchange box 2. The bottom end of the serpentine heat exchange pipe 6 is arranged inside the purification box 8. Through the liquid level observation window 7, the operator can observe the liquid level situation inside the heat exchange box 2 at any time to ensure the normal operation of the equipment. The water after heat exchange will flow into the purification box 8, where water quality purification treatment is carried out. After removing impurities, the purified water can be reused or discharged, thus realizing the recycling of resources and environmental protection.

[0031] A first sliding groove 9 is opened on the inner wall of the purification box 8. A first sliding block 10 is slidably connected inside the first sliding groove 9. A first placement box 11 is fixedly connected to the surface of the first sliding block 10. Inside the purification box 8, the first sliding groove 9 provides a sliding track, enabling the first sliding block 10 to slide on the track. Since the first sliding block 10 is fixedly connected to the first placement box 11, the first placement box 11 can be moved by sliding the first sliding block 10.

[0032] A coarse filter screen 12 is arranged on the inner bottom wall of the first placement box 11. Inside the purification box 8, when the water flow passes through the first placement box 11, it first passes through the coarse filter screen 12. The aperture of the coarse filter screen 12 is relatively large, which can intercept large - particle impurities in the water. After the preliminary filtration by the coarse filter screen 12, the relatively clean water flow continues to enter the subsequent purification system for further treatment.

[0033] A second sliding groove 13 is opened on the inner wall of the purification box 8. A second sliding block 14 is slidably connected inside the second sliding groove 13. The outer surface of the second sliding block 14 is fixedly connected to a second placement box 15.

[0034] A precision filter screen 16 is arranged on the inner bottom wall of the second placement box 15. The aperture of the precision filter screen 16 is relatively small, which can capture fine particles and suspended matters in the water. After the further filtration by the precision filter screen 16, the water quality is significantly improved to meet the use requirements. The operator can regularly open the second placement box 15 to take out the precision filter screen 16 for cleaning or replacement to ensure its filtering effect.

[0035] The front ends of the first placement box 11 and the second placement box 15 are fixedly connected with an auxiliary handle 17. The auxiliary handle 17 provides a gripping point, enabling the operator to more conveniently draw out or push in the placement box, thus simplifying the maintenance and cleaning processes.

[0036] Support feet 18 are fixedly connected to the four corners of the lower surface of the purification box 8.

[0037] The implementation principle of a four-layer wire forming device for producing coated kraft paper in the embodiment of the present application is as follows: During the production of coated kraft paper, the four-layer wire forming device 1 discharges the excess water in the paper through the conical flow holes 4 into the serpentine heat exchange tubes 6 inside the heat exchange box 2. These water containing heat exchange with the cold water inside the heat exchange box 2 to achieve heat recovery. A liquid level observation window 7 is provided at the front end of the heat exchange box 2, and the operator can observe the liquid level situation inside the heat exchange box 2 through the liquid level observation window 7 at any time. At the same time, the bottom end of the serpentine heat exchange tube 6 is connected to the inside of the purification box 8 to prepare for water quality purification treatment of the water after heat exchange. Inside the purification box 8, the first chute 9 provides a sliding track, enabling the first slider 10 to slide on the track, thereby moving the first placement box 11. A coarse filter screen 12 is provided on the inner bottom wall of the first placement box 11. When the water flow passes through the first placement box 11, large particle impurities in the water are intercepted by the coarse filter screen 12. A second chute 13 is provided on the inner wall of the purification box 8, and the second slider 14 slides on the track, connecting to the second placement box 15. A fine filter screen 16 is provided on the inner bottom wall of the second placement box 15, and its aperture is small, capable of capturing fine particles and suspended substances in the water. After further filtration by the fine filter screen 16, the water quality is significantly improved to meet the usage requirements. The front ends of the first placement box 11 and the second placement box 15 are fixedly connected with an auxiliary handle 17, and the operator can conveniently draw out or push in the placement box through the auxiliary handle 17, and regularly clean or replace the coarse filter screen 12 and the fine filter screen 16 to ensure their filtering effects. Support feet 18 are fixedly connected to the four corners of the lower surface of the purification box 8 to ensure the stability of the entire system and avoid unnecessary movement or damage during operation and maintenance.

[0038] The above implementation manners are only the preferred implementation manners of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model belong to the scope of protection required by the present utility model.

Claims

1. A four - layer wire forming equipment for producing coated kraft paper, characterized in that, It includes a four - ply wire forming device (1). The lower surface of the four - ply wire forming device (1) is fixedly connected to a heat exchange box (2). The upper surface of the heat exchange box (2) is provided with a water accumulation groove (3). The middle of the inner bottom wall of the water accumulation groove (3) is provided with a conical flow hole (4). The upper surface of the heat exchange box (2) is fixedly connected to a filling pipe (5). The inner wall of the heat exchange box (2) is fixedly connected to a serpentine heat exchange pipe (6).

2. The four - layer wire forming equipment for producing coated kraft paper according to claim 1, characterized in that: A liquid level observation window (7) is arranged at the front end of the heat exchange box (2). The lower surface of the heat exchange box (2) is fixedly connected to a purification box (8). The bottom end of the serpentine heat exchange pipe (6) is arranged inside the purification box (8).

3. The four-layer wire forming equipment for producing coated kraft paper according to claim 2, characterized in that: The inner wall of the purification box (8) is provided with a first sliding groove (9). A first sliding block (10) is slidably connected inside the first sliding groove (9). The surface of the first sliding block (10) is fixedly connected to a first placement box (11).

4. The four - layer wire forming equipment for producing coated kraft paper according to claim 3, wherein: A coarse - mesh filter screen (12) is arranged on the inner bottom wall of the first placement box (11).

5. The four - ply wire forming equipment for producing coated kraft paper according to claim 2, wherein: The inner wall of the purification box (8) is provided with a second sliding groove (13). A second sliding block (14) is slidably connected inside the second sliding groove (13). The outer surface of the second sliding block (14) is fixedly connected to a second placement box (15).

6. The four - ply wire forming equipment for producing coated kraft paper as described in claim 5, characterized in that: A precision filter screen (16) is arranged on the inner bottom wall of the second placement box (15).

7. The four - layer wire forming equipment for producing coated kraft paper according to claim 3, characterized in that: Auxiliary handles (17) are fixedly connected to the front ends of the first placement box (11) and the second placement box (15).

8. The four - layer wire forming equipment for producing coated kraft paper according to claim 2, characterized in that: Support feet (18) are fixedly connected to the four corners of the lower surface of the purification box (8).

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