Dilution device for pressure screens

Abstract

This utility model discloses a dilution device for a pressure screen, including a tank with a screening chamber inside. The screening chamber contains a screen cylinder. By fixing the two ends of the circulating water path to the inlet and outlet pipes of the tank respectively, a closed liquid circulation path is formed. The screened liquid can flow back to the inlet pipe through the circulating water path and be used again for slurry dilution, which greatly reduces the amount of fresh water used, lowers the production cost of enterprises, reduces waste liquid discharge, and alleviates the pressure on sewage treatment, in line with the concept of green production. In addition, the tank connected to the circulating water path is equipped with a partition and a removable filter screen. When the recovered diluted liquid flows through the tank, the filter screen can intercept impurities, fibers and other substances in the liquid, preventing these impurities from re-entering the pressure screen with the circulating water, affecting the screening effect and equipment operation, ensuring the cleanliness of the diluted liquid, and thus stabilizing the screening efficiency and quality of the pressure screen.

Description

Technical Field

[0001] This utility model relates to the field of pulp and paper making equipment technology, specifically a dilution device for pressure screens. Background Technology

[0002] Pressure screens are widely used in the solid-liquid separation and screening process of pulp and paper making. By screening and separating the pulp, qualified fibers or granular materials are extracted. In order to ensure the screening effect, a dilution device is usually used to dilute the pulp entering the pressure screen to adjust the pulp concentration, improve the fluid characteristics, and enable the material to pass through the screen drum more smoothly, thereby improving screening efficiency and quality.

[0003] Existing pressure screen dilution devices generally lack a mechanism for recycling the diluent. In actual production, a large amount of diluent is discharged with the screened material and treated directly as waste liquid, resulting in the waste of water resources and significantly increasing the production cost of enterprises. Therefore, we need to propose a dilution device for pressure screens. Utility Model Content

[0004] The purpose of this invention is to provide a dilution device for a pressure screen. By setting up a circulating water path connected to the tank's inlet and outlet pipes, and by setting up a box with internal baffles and a removable filter screen in the circulating water path, the cleanliness of the recovered liquid can be improved, and the effect of recycling the diluted liquid can be achieved, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dilution device for a pressure screen includes: a tank body having a screening chamber inside, and a screen cylinder being installed inside the screening chamber;

[0007] The circulating water circuit is fixedly connected at both ends to the inlet pipe and outlet pipe on the tank, respectively. A box is connected to the circulating water circuit, and a partition is provided inside the box. A filter screen is detachably inserted into the partition.

[0008] Preferably, the partition is L-shaped, and both ends of the partition are fixedly connected to the inner wall of the box.

[0009] Preferably, a through groove is provided on one side wall of the housing, and a slot adapted to the filter screen is provided inside the partition, and the filter screen passes through the through groove and is inserted into the slot.

[0010] Preferably, a sealing plate is fixedly connected to one side wall of the filter screen, and the sealing plate is bolted to one side wall of the housing by fixing screws.

[0011] Preferably, the circulating water circuit includes a first connecting pipe, one end of which is fixedly connected to the outlet pipe and the other end of which is fixedly connected to the tank body. The outlet end of the first connecting pipe is located above the filter screen plate. A second connecting pipe is fixedly connected to the top of the tank body, and one end of the second connecting pipe is fixedly connected to the inlet pipe.

[0012] Preferably, the second connecting pipe and the water outlet pipe are both connected to a pump body.

[0013] Preferably, a support plate is fixedly connected to the bottom of the container, and the support plate is fixedly connected to the outer wall of the container.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention forms a closed liquid circulation path by fixing the two ends of the circulating water circuit to the inlet and outlet pipes of the tank, respectively. The screened liquid can flow back to the inlet pipe through the circulating water circuit and be used again for slurry dilution, which greatly reduces the amount of fresh water used, lowers the production cost of enterprises, reduces waste liquid discharge, and alleviates the pressure on sewage treatment, which is in line with the concept of green production. In addition, the tank connected to the circulating water circuit is equipped with a partition and a removable filter screen. When the recovered diluted liquid flows through the tank, the filter screen can intercept impurities, fibers and other substances in the liquid, preventing these impurities from re-entering the pressure screen with the circulating water, affecting the screening effect and equipment operation, ensuring the cleanliness of the diluted liquid, and thus stabilizing the screening efficiency and quality of the pressure screen. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the tank and the sieve cylinder of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the box body of this utility model;

[0019] Figure 4 This is a schematic diagram of the circulating water circuit and the tank body of this utility model.

[0020] In the diagram: 1. Tank body; 2. Screening chamber; 3. Screen cylinder; 4. Inlet pipe; 5. Outlet pipe; 6. Box body; 7. Baffle plate; 8. Filter screen; 9. Through groove; 10. Slot; 11. Sealing plate; 12. Circulating water circuit; 1201. First connecting pipe; 1202. Second connecting pipe; 1203. Pump body; 13. Support plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution:

[0023] A dilution device for pressure screening includes: a tank 1, which has a screening chamber 2 inside, and a screen cylinder 3 inside the screening chamber 2. By setting up the screening chamber 2 and the screen cylinder 3, a core space for slurry screening is formed. When the slurry enters the screening chamber 2, qualified fiber or particulate materials can be screened out through the screen holes of the screen cylinder 3 under the action of the screen cylinder 3.

[0024] The circulating water path 12 is fixedly connected at both ends to the inlet pipe 4 and the outlet pipe 5 on the tank 1, respectively. The circulating water path 12 is connected to the box 6, and the box 6 is equipped with a partition 7. A filter screen 8 is detachably inserted into the partition 7. By setting up the circulating water path 12 to connect the inlet pipe 4 and the outlet pipe 5, a diluent circulation system is constructed. The screened diluent can be returned through the circulating water path 12, reducing the use of fresh water. By connecting the box 6 and setting up the partition 7 and the filter screen 8, when the recovered diluent flows through the box 6, the filter screen 8 can intercept impurities, fibers, etc., and prevent impurities from re-entering the pressure screen with the circulating water. This achieves the effect of recycling the diluent and improving the cleanliness of the recovered liquid.

[0025] The partition 7 is L-shaped, and its two ends are fixedly connected to the inner wall of the box 6. By designing the partition 7 as L-shaped and fixing it to the inner wall of the box, a stable support structure is provided for the filter screen 8, so that the filter screen 8 can remain stable when intercepting impurities, and is not easy to shake or shift, thus ensuring the stability of the filtration effect and achieving the effect of enhancing the installation stability of the filter screen 8.

[0026] A through groove 9 is provided on one side wall of the housing 6, and a slot 10 adapted to the filter screen plate 8 is provided inside the partition 7. The filter screen plate 8 passes through the through groove 9 and is inserted into the slot 10. By providing a through groove 9 on the side wall of the housing 6 and a slot 10 in the partition 7, the filter screen plate 8 can be easily inserted and removed. When the filter screen plate 8 needs to be cleaned or replaced, the operator can directly pull it out from the through groove 9. The operation is simple and quick, reducing the time and difficulty of equipment maintenance, and achieving the effect of facilitating the installation and disassembly of the filter screen plate 8.

[0027] A sealing plate 11 is fixedly connected to one side wall of the filter screen plate 8. The sealing plate 11 is bolted to one side wall of the housing 6 by fixing screws. By setting the sealing plate 11 and fixing it with fixing screws, the sealing performance of the filter screen plate 8 after installation is enhanced, preventing unfiltered diluted liquid from flowing out from the gaps and ensuring the filtration effect. On the other hand, the filter screen plate 8 is further fixed, making it more secure during operation, thus achieving the purpose of improving the sealing performance and fixing effect of the filter screen plate 8.

[0028] The circulating water path 12 includes a first connecting pipe 1201. One end of the first connecting pipe 1201 is fixedly connected to the outlet pipe 5, and the other end of the first connecting pipe 1201 is fixedly connected to the tank 6. The outlet end of the first connecting pipe 1201 is located above the filter screen plate 8. A second connecting pipe 1202 is fixedly connected to the top of the tank 6. One end of the second connecting pipe 1202 is fixedly connected to the inlet pipe 4. By setting the first connecting pipe 1201 and the second connecting pipe 1202, a specific connection path of the circulating water path 12 is constructed, so that the diluent flowing out of the outlet pipe 5 can flow into the tank 6 through the first connecting pipe 1201, be filtered by the filter screen plate 8, and then flow back to the inlet pipe 4 through the second connecting pipe 1202, forming a complete circulation process, which achieves the effect of ensuring that the circulation path of the diluent is smooth and orderly.

[0029] Pump bodies 1203 are connected to both the second connecting pipe 1202 and the outlet pipe 5. By installing pump bodies 1203 on the second connecting pipe 1202 and the outlet pipe 5, the flow of the diluent in the circulating water circuit 12 can be powered, ensuring that the diluent can overcome factors such as pipe resistance and flow smoothly from the outlet pipe 5 to the inlet pipe 4, achieving stable circulation and providing power for the circulation of the diluent and ensuring circulation efficiency.

[0030] Pump body 1203 can be selected from ISG type vertical pipeline centrifugal pump, which has significant advantages such as high efficiency and energy saving, low noise and reliable performance. This model of pump is optimized based on the performance parameters of general vertical pump and combined with IS type centrifugal pump, with a flow range of 6.3-400m³ / h. 3 With a flow rate of / h and a head ranging from 5 to 125m, the appropriate head can be selected based on the actual needs of the equipment. It boasts high hydraulic efficiency and energy saving, low noise and vibration during operation, and a mechanical seal for the shaft seal. The stationary ring is made of integral alloy or silicon carbide, while the rotating ring is made of graphite, providing excellent sealing performance and a long service life. Suitable for conveying clean water and similar liquids, it meets the requirements for diluent circulation and can stably drive the liquid flow in the circulating water circuit while reducing maintenance frequency.

[0031] A support plate 13 is fixedly connected to the bottom of the box 6. The support plate 13 is fixedly connected to the outer wall of the tank 1. By setting the support plate 13 to connect the box 6 and the tank 1, the connection between the box 6 and the tank 1 is strengthened, making the whole device more stable during operation and reducing the impact of shaking or displacement on the circulating water circuit 12 and other components.

[0032] Working principle: After the slurry enters the screening chamber 2 of the tank 1, it is screened and separated under the action of the screen cylinder 3. During the screening process, the water inlet pipe 4 injects diluent into the screening chamber 2 to adjust the slurry concentration, improve fluid characteristics, and increase screening efficiency. The diluted mixture after slurry screening flows out from the water outlet pipe 5 and enters the tank 6 through the first connecting pipe 1201. At this time, the pump body 1203 provides power to make the liquid flow. Inside the tank 6, the filter screen 8 intercepts impurities and fibers in the mixture. The filtered diluted liquid flows back to the water inlet pipe 4 through the second connecting pipe 1202 under the action of the pump body 1203, and is used again for slurry dilution, thus forming a recycling of the diluted liquid. When the filter screen 8 needs to be cleaned or replaced, the fixing screws of the sealing plate 11 can be unscrewed, and it can be pulled out from the slot 10 through the through groove 9. After the maintenance operation is completed, it can be reinstalled.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dilution device for a pressure screen, characterized in that include: The tank (1) has a screening chamber (2) inside, and the screening chamber (2) has a screen cylinder (3) inside; The circulating water path (12) is fixedly connected at both ends to the inlet pipe (4) and outlet pipe (5) on the tank (1), respectively. The circulating water path (12) is connected to the box (6), and the box (6) is equipped with a partition (7). The partition (7) is detachably inserted with a filter screen (8).

2. A dilution device for a pressure screen according to claim 1, characterized in that: The partition (7) is L-shaped, and both ends of the partition (7) are fixedly connected to the inner wall of the box (6).

3. A dilution device for a pressure screen as defined in claim 1, characterized in that: A through groove (9) is provided on one side wall of the box (6), and a slot (10) adapted to the filter screen plate (8) is provided inside the partition plate (7). The filter screen plate (8) passes through the through groove (9) and is inserted into the slot (10).

4. A dilution device for a pressure screen according to claim 1, characterized in that: A sealing plate (11) is fixedly connected to one side wall of the filter screen (8), and the sealing plate (11) is bolted to one side wall of the box body (6) by fixing screws.

5. A dilution device for a pressure screen according to claim 1, characterized in that: The circulating water circuit (12) includes a first connecting pipe (1201), one end of which is fixedly connected to the outlet pipe (5), and the other end of which is fixedly connected to the box body (6). The outlet end of the first connecting pipe (1201) is located above the filter screen plate (8). The top of the box body (6) is fixedly connected to a second connecting pipe (1202), one end of which is fixedly connected to the inlet pipe (4).

6. A dilution device for a pressure screen according to claim 5, characterized in that: The second connecting pipe (1202) and the water outlet pipe (5) are both connected to the pump body (1203).

7. A dilution device for a pressure screen according to claim 1, characterized in that: The bottom of the box (6) is fixedly connected to a support plate (13), which is fixedly connected to the outer wall of the tank (1).

Images