Paper pulp reuse water filtering equipment

Abstract

The utility model relates to paper pulp reuse water filtering equipment, and relates to the technical field of papermaking, the paper pulp reuse water filtering equipment comprises a cylinder body, a central pipe rotatably arranged in the cylinder body, a filter screen arranged in the cylinder body, a plurality of branch pipes fixed at one end of the central pipe in the cylinder body, a plurality of nozzles fixed at the bottom of the branch pipes, and an activated carbon filtering layer arranged below the filter screen in the cylinder body, and a slag discharging opening is formed in the center of the filter screen and is downwards communicated with a slag discharging pipe. Through inclined spraying and rotation of the spray head and taper setting of the filter screen, filtering is achieved through the gravity of water, and electric energy consumption is reduced; the filtered impurities spontaneously move into the slag discharge port under the action of water flow and gravity, so that the filter screen is free of cleaning; the surface characteristic that activated carbon has countless micropores is utilized, fine impurities in water can be intercepted and adsorbed, secondary filtration is achieved, the treatment rate of paper pulp reuse water is increased, and the quality of filtered water is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking, and in particular to a pulp recycling water filtering device. Background Art

[0002] Pulp backwater refers to the process of treating and reusing wastewater generated in the papermaking process. Papermaking wastewater contains a large amount of suspended matter, organic matter, and inorganic salt ions such as calcium and magnesium. The recycling of papermaking wastewater will cause the accumulation of pollutants, and after recycling, scaling and electrochemical corrosion will occur in the circulation system. In order to reduce or eliminate the corrosion and scaling of wastewater on equipment and pipelines, and to obtain recycled water with better water quality, papermaking wastewater needs to be filtered and treated.

[0003] The existing pulp recycled water filtering equipment basically uses a filter screen to filter the recycled water. However, the filter screen is limited by its mesh size and cannot intercept tiny granular impurities, which needs to be improved. Utility Model Content

[0004] The present application provides a pulp recycled water filtering device, which can intercept and adsorb tiny granular impurities and improve the water quality of recycled water by setting an activated carbon filter layer.

[0005] The present application provides a pulp recycling water filtering device, which adopts the following technical solution:

[0006] A pulp recycled water filtering device comprises a cylinder, a central tube rotatably arranged on the cylinder, and a filter screen arranged in the cylinder, wherein the end of the central tube located outside the cylinder is used for connecting recycled water, the end of the central tube located inside the cylinder is fixed with a plurality of branch pipes, a plurality of nozzles are fixed at the bottom of the branch pipes, the filter screen is located below the nozzles, an activated carbon filter layer is arranged in the cylinder below the filter screen, a slag discharge port is opened in the center of the filter screen, the slag discharge port is downwardly connected to a slag discharge pipe, and a water outlet pipe is fixed at the bottom of the outer wall of the cylinder.

[0007] By adopting the above technical solution, the pulp recycled water to be filtered is sent to the top of the central tube, and then the water is sprayed out from the nozzle through the branch pipe. At the same time, the motor drives the central axis to rotate, causing the branch pipe to rotate. The water passing through the filter screen falls on the activated carbon filter layer. The surface characteristics of the activated carbon material with countless micropores can intercept and adsorb the fine impurities in the water, thereby further improving the quality of the filtered water.

[0008] Optionally, the activated carbon filter layer includes a support frame, a bottom net fixed on the support frame, and a plurality of activated carbon materials placed on the bottom net.

[0009] By adopting the above technical solution, the support frame and the bottom net stably support the activated carbon material above to prevent the activated carbon material from falling downwards.

[0010] Optionally, a hand hole is opened on the outer wall of the cylinder, and the height position of the hand hole corresponds to the activated carbon filter layer.

[0011] By adopting the above technical solution, the activated carbon material can be replaced through the hand hole and operated using auxiliary tools such as rakes.

[0012] Optionally, a support ring is fixed to the outer wall of the slag discharge pipe, and the support frame is rotatably sleeved outside the slag discharge pipe. A thrust bearing is provided between the support frame and the support ring to establish a rotational connection.

[0013] By adopting the above technical solution and arranging a thrust bearing, the activated carbon filter layer can be easily rotated, so that all old activated carbon materials can be taken out through a single hand hole, and new activated carbon materials can be put in and flattened.

[0014] Optionally, a closing plate is inserted into the outer wall of the cylinder, and the closing plate closes the hand hole.

[0015] By adopting the above technical solution, after the closing plate is installed, water can be prevented from leaking out from the hand hole.

[0016] Optionally, a cleaning hole is opened on the outer wall of the cylinder, and the height position of the cleaning hole corresponds to the branch pipe.

[0017] By adopting the above technical solution, the branch pipe can be easily cleaned through the cleaning hole.

[0018] Optionally, the end of the branch pipe away from the central pipe is open and threadedly connected with a cover plate.

[0019] By adopting the above technical solution, after the cover plate is removed by rotation, the end of the branch pipe is connected to the outside world, and the outside world can directly touch the inlet position of the nozzle, thereby facilitating cleaning of the inlet end of the nozzle.

[0020] Optionally, a sleeve is threadedly connected to the cleaning hole, the inner diameter of the sleeve is matched with the outer diameter of the branch pipe, and an end cap is provided at the end of the sleeve away from the branch pipe.

[0021] By adopting the above technical solution, after removing the cover plate at the outer end of the branch pipe, the sleeve is installed back into the cleaning hole. With the threaded connection of the outer wall of the sleeve, the sleeve is moved into the cylinder until the sleeve is sleeved outside the branch pipe. Then, a long-handled brush is inserted into the branch pipe to brush out impurities blocking the inlet of the nozzle. The cleaned impurities leave the cylinder directly through the sleeve to avoid secondary pollution.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Through the tilted spraying and rotation of the nozzle and the taper setting of the filter, the gravity of the water itself is used to achieve filtration, which reduces the power consumption and makes full use of the surface area of ​​the filter.

[0024] 2. The filtered impurities move spontaneously to the slag discharge port under the action of water flow and gravity, thus realizing the cleaning-free filter screen;

[0025] 3. Activated carbon has countless micropores on its surface, which can intercept and adsorb tiny impurities in the water, achieve secondary filtration, increase the treatment rate of pulp recycled water, and further improve the quality of the filtered water. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a cross-sectional view of a pulp recycling water filtering device according to an embodiment;

[0027] Figure 2 yes Figure 1 A magnified image of point A;

[0028] Figure 3 It is an exploded view of the filter screen and the activated carbon filter layer in the embodiment.

[0029] Explanation of the reference numerals: 1. Cylinder; 2. Center tube; 21. Branch tube; 22. Nozzle; 23. Cover plate; 11. Cleaning hole; 3. Sleeve; 31. End cover; 12. Filter screen; 13. Slag outlet; 14. Slag outlet pipe; 15. Water outlet pipe; 4. Activated carbon filter layer; 41. Support frame; 42. Bottom net; 43. Activated carbon material; 141. Support ring; 142. Thrust bearing; 16. Hand hole; 17. Closing plate. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1 This embodiment discloses a pulp recycling water filtering device, including a cylinder 1, a central tube 2 rotatably arranged on the cylinder 1, one end of the central tube 2 located outside the cylinder 1 is used to connect the recycling water, and the central tube 2 is driven to rotate by a motor fixed to the top of the cylinder 1. A plurality of branch pipes 21 are fixed to one end of the central tube 2 located inside the cylinder 1, and a plurality of nozzles 22 are fixed to the bottom of the branch pipes 21. The plurality of branch pipes 21 are evenly distributed about the circumference of the central tube 2, and the nozzles 22 are spaced apart along the length direction of the branch pipes 21, and the nozzles 22 are tilted downward.

[0032] Reference Figure 1 and Figure 2The end of the branch pipe 21 away from the central pipe 2 is open and threadedly connected with a cover plate 23, and a sealing ring is provided between the cover plate 23 and the branch pipe 21 for sealing. After the cover plate 23 is removed by rotation, the end of the branch pipe 21 is connected to the outside world, and the outside world can directly reach the inlet position of the nozzle 22. A cleaning hole 11 is provided on the outer wall of the cylinder 1, and the height position of the cleaning hole 11 corresponds to the branch pipe 21. A sleeve 3 is threadedly connected to the cleaning hole 11, and the inner diameter of the sleeve 3 is adapted to the outer diameter of the branch pipe 21. The end of the sleeve 3 away from the branch pipe 21 is covered with an end cap 31, and the end cap 31 is used to close the sleeve 3.

[0033] The pulp recycled water contains solid impurities, and when the impurities gather, there is a possibility of clogging the nozzle 22. When the nozzle 22 is blocked or the flow rate is significantly reduced, the equipment is shut down, and the branch pipe 21 that blocks the nozzle 22 is rotated to the position of the cleaning hole 11, and then the sleeve 3 is rotated to remove the sleeve 3 from the cleaning hole 11, and the end cover 31 at the outer end of the sleeve 3 is removed. The hand reaches into the cleaning hole 11 and rotates the cover plate 23 to remove the cover plate 23, and then the sleeve 3 is put back into the cleaning hole 11. With the threaded connection of the outer wall of the sleeve 3, the sleeve 3 moves into the cylinder 1 until the sleeve 3 is sleeved on the outside of the branch pipe 21. Then, a long-handled brush is inserted into the branch pipe 21 to brush out the impurities blocked at the entrance of the nozzle 22, and the cleaned impurities leave the cylinder 1 directly through the sleeve 3 to avoid secondary pollution.

[0034] Reference Figure 1 and Figure 3 , a filter screen 12 is arranged in the cylinder 1, and the filter screen 12 is located below the nozzle 22. The filter screen 12 is an annular structure and has a certain taper. A slag discharge port 13 is opened in the center of the filter screen 12, and the slag discharge port 13 is located at the bottom of the cone of the filter screen 12, so that the garbage on the filter screen 12 has a tendency to move toward the center. Under the joint action of the inclined water spraying of the nozzle 22, it is easy to realize that the garbage on the filter screen 12 moves toward the slag discharge port 13. The slag discharge port 13 is connected downwardly with a slag discharge pipe 14, and the lower end of the slag discharge pipe 14 passes through the outside of the cylinder 1. The outer ring wall of the filter screen 12 is fixed to the inner wall of the cylinder 1, and the inner ring wall of the filter screen 12 is fixed to the slag discharge pipe 14. A water outlet pipe 15 is fixed at the bottom of the outer wall of the cylinder 1, and the water outlet pipe 15 is used to discharge the filtered water.

[0035] An activated carbon filter layer 4 is provided below the filter screen 12 in the cylinder 1. The activated carbon filter layer 4 includes a support frame 41, a bottom screen 42 fixed on the support frame 41, and a plurality of activated carbon materials 43 placed on the bottom screen 42. A support ring 141 is fixed to the outer wall of the slag discharge pipe 14. The support frame 41 is rotatably sleeved outside the slag discharge pipe 14. A thrust bearing 142 is provided between the support frame 41 and the support ring 141 to establish a rotation connection. The bottom screen 42 is a stainless steel screen, which is used to prevent the activated carbon material 43 from falling downward. The activated carbon material 43 can be an activated carbon block, activated carbon particles, or a mixture of the two. The activated carbon material 43 is laid with a certain thickness to ensure that water must pass through the activated carbon material 43 when falling downward.

[0036] Reference Figure 1 The outer wall of the cylinder 1 is provided with a hand hole 16, the height position of the hand hole 16 corresponds to the activated carbon filter layer 4, and the outer wall of the cylinder 1 is plugged with a closing plate 17, which closes the hand hole 16. Through the hand hole 16, it is convenient to operate the activated carbon material 43.

[0037] The implementation principle of a pulp recycling water filtering device in an embodiment of the present application is as follows: the pulp recycling water to be filtered is fed into the top of the central pipe 2, and then the water is sprayed out from the nozzle 22 through the branch pipe 21. At the same time, the output end of the motor drives the central axis to rotate through the reducer, so that the branch pipe 21 rotates. Through the inclined spraying and rotation of the nozzle 22 and the tapered setting of the filter screen 12, the gravity of the water itself is used to achieve filtration, thereby reducing power consumption. On the other hand, the surface area of ​​the filter screen 12 can be fully utilized, and the filtered impurities spontaneously move into the slag discharge port 13 under the action of water flow and gravity, thereby achieving the cleaning-free filter screen 12.

[0038] The water passing through the filter screen 12 falls onto the activated carbon filter layer 4. The activated carbon material 43 has a surface characteristic of countless micropores, which can intercept and adsorb fine impurities in the water, thereby further improving the quality of the filtered water.

[0039] After long-term use, the activated carbon material 43 needs to be replaced. The closing plate 17 can be removed to expose the hand hole 16, and the activated carbon material 43 can be replaced through the hand hole 16, and auxiliary tools such as rakes can be used for operation. By providing the thrust bearing 142, the activated carbon filter layer 4 can be easily rotated, so that all old activated carbon materials 43 can be taken out through a single hand hole 16, and new activated carbon materials 43 can be put in and flattened.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pulp recycling water filtering device, characterized in that: The invention comprises a cylinder (1), a central tube (2) rotatably arranged on the cylinder (1), and a filter screen (12) arranged in the cylinder (1); one end of the central tube (2) located outside the cylinder (1) is used for connecting recycled water; one end of the central tube (2) located inside the cylinder (1) is fixed with a plurality of branch pipes (21); a plurality of nozzles (22) are fixed at the bottom of the branch pipes (21); the filter screen (12) is located below the nozzles (22); an activated carbon filter layer (4) is arranged in the cylinder (1) below the filter screen (12); a slag discharge port (13) is opened at the center of the filter screen (12); the slag discharge port (13) is connected downwardly to a slag discharge pipe (14); and a water outlet pipe (15) is fixed at the bottom of the outer wall of the cylinder (1).

2. A pulp recycling water filtering device according to claim 1, characterized in that: The activated carbon filter layer (4) comprises a support frame (41), a bottom net (42) fixed on the support frame (41), and a plurality of activated carbon materials (43) placed on the bottom net (42).

3. A pulp recycling water filtering device according to claim 2, characterized in that: The outer wall of the cylinder (1) is provided with a hand hole (16), and the height position of the hand hole (16) corresponds to the activated carbon filter layer (4).

4. A pulp recycling water filtering device according to claim 3, characterized in that: A support ring (141) is fixed to the outer wall of the slag discharge pipe (14), the support frame (41) is rotatably sleeved outside the slag discharge pipe (14), and a thrust bearing (142) is provided between the support frame (41) and the support ring (141) to establish a rotational connection.

5. The pulp recycling water filtering equipment according to claim 3, characterized in that: A closing plate (17) is inserted into the outer wall of the cylinder (1), and the closing plate (17) closes the hand hole (16).

6. The pulp recycling water filtering equipment according to claim 1, characterized in that: The outer wall of the cylinder (1) is provided with a cleaning hole (11), and the height position of the cleaning hole (11) corresponds to the branch pipe (21).

7. A pulp recycling water filtering device according to claim 6, characterized in that: The end of the branch pipe (21) away from the central pipe (2) is open and is threadedly connected with a cover plate (23).

8. The pulp recycling water filtering equipment according to claim 7, characterized in that: The cleaning hole (11) is internally threadedly connected with a sleeve (3), the inner diameter of the sleeve (3) is matched with the outer diameter of the branch pipe (21), and the end of the sleeve (3) away from the branch pipe (21) is covered with an end cap (31).

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