A subway shield sludge treatment filter pressing device

Abstract

The utility model relates to shield sludge treatment technical field, especially a kind of filter-pressing device for subway shield sludge treatment, including plate-and-frame filter press body and blowing mechanism. Plate-and-frame filter press body includes rack, first fixed plate, second fixed plate, compression plate, filter plate and hydraulic cylinder, first fixed plate and second fixed plate are separately arranged at the both ends of rack, compression plate is close to first fixed plate and is set, multiple filter plates are arranged between compression plate and second fixed plate, hydraulic cylinder is fixed on first fixed plate and the telescopic end is connected with first fixed plate, second fixed plate is provided with feed pipe and water inlet and water outlet pipe. Blowing mechanism includes advancing frame, high-pressure gas pump, gas pipe and blowing nozzle, advancing frame is set on filter plate above and is n-shaped structure, and advancing frame can be moved between first fixed plate and second fixed plate, gas pipe is set below the top of advancing frame and is connected with high-pressure gas pump, and multiple blowing nozzles are set on the bottom of gas pipe.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel sludge treatment technology, and more specifically, to a filter press device for treating sludge from subway shield tunnels. Background Technology

[0002] Subway tunnel boring machines (TBMs) are an important construction technology in urban subway construction. They are a method of excavating tunnels underground. During the process of subway TBM construction, a large amount of mud is generated. In order to improve the transportability of the mud, it is usually injected into a filter press for filtration, which turns it into a filter cake for transport.

[0003] However, existing filter press devices have certain shortcomings in actual use. When the filter cake after the sludge produced by the subway shield tunneling machine is highly viscous, it may stick to the filter cloth during the plate pulling and unloading operation. Due to the short plate pulling time, the filter cake stuck to the filter cloth cannot fall completely during the plate pulling process, which affects the efficiency of subsequent sludge filter pressing. Utility Model Content

[0004] This invention aims to overcome the problem that highly viscous filter cakes stick to the filter cloth and cannot completely fall off during the plate pulling process, thus affecting the efficiency of subsequent sludge dewatering. It provides a dewatering device for subway shield tunnel sludge treatment that can solve the above problem.

[0005] A filter press device for treating sludge from subway tunnel boring machines includes a plate and frame filter press body and an air blowing mechanism. The plate and frame filter press body includes a frame, a first fixed plate, a second fixed plate, a pressing plate, filter plates, and a hydraulic cylinder. The first and second fixed plates are respectively located at both ends of the frame. The pressing plate is positioned close to the first fixed plate. Multiple filter plates are disposed between the pressing plate and the second fixed plate. The hydraulic cylinder is fixed to the first fixed plate, and its telescopic end is connected to the first fixed plate. The second fixed plate is provided with a feed pipe and a water inlet / outlet pipe. The air blowing mechanism includes a traveling frame, a high-pressure air pump, an air outlet pipe, and air blowing nozzles. The traveling frame has an n-shaped structure and is positioned above the filter plates. The traveling frame can move between the first and second fixed plates. The air outlet pipe is located below the top of the traveling frame and connected to the high-pressure air pump. Multiple air blowing nozzles are located at the bottom of the air outlet pipe.

[0006] Furthermore, a pull-plate trolley is provided between the first fixed plate and the second fixed plate, and the traveling frame moves synchronously with the pull-plate trolley.

[0007] Furthermore, the two plate-pulling trolleys are located on both sides of the filter plate, and the two ends of the traveling frame are respectively connected to the two plate-pulling trolleys.

[0008] Furthermore, the high-pressure air pump is disposed on the top surface of the traveling frame.

[0009] Furthermore, two air outlet pipes are arranged side by side below the top of the traveling frame, and each of the two air outlet pipes is provided with an air blowing nozzle at its bottom. The distance between the central axes of the two air outlet pipes is greater than or equal to the thickness of the filter plate.

[0010] Furthermore, a water injection pipe and a water drain pipe are provided at the end of the water inlet and outlet pipe away from the second fixed plate, and a first reversing valve is provided between the water inlet and outlet pipe, the water injection pipe and the water drain pipe.

[0011] Furthermore, a feed valve is provided on the feed pipe, and a mud pump is connected to the end of the feed pipe away from the second fixed plate. An injection pipe is connected to the inlet of the mud pump, and a coarse filter screen is provided at the end of the injection pipe away from the mud pump.

[0012] Furthermore, the coarse filter screen has a cylindrical structure and is detachably connected to the injection tube.

[0013] Furthermore, two plate and frame filter press bodies are arranged side by side, and the feed pipes of the two plate and frame filter press bodies are connected to the conveying pipe through a second reversing valve. The conveying pipe is connected to the outlet of the mud pump.

[0014] Furthermore, machine bases are provided on both sides of the first and second fixing plates, and a sludge hopper is provided below the filter plate, with the sludge hopper connected to the machine base.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The filter press device for treating sludge from subway tunnel boring machines in this invention features an air blowing mechanism. The traveling frame can move between the first fixed plate and the second fixed plate. During the cake unloading operation, the traveling frame moves to the outside of the filter plate and delivers gas to the air outlet pipe and air blowing nozzle through a high-pressure air pump. This gas is then blown onto the filter plate through the air blowing nozzle, helping the sticky filter cake adhering to the filter cloth to fall off.

[0017] By installing a coarse filter screen at the end of the injection pipe away from the mud pump, the coarse filter screen is placed in the sludge tank during use. Before the mud is transported to the plate and frame filter press body, large particles of impurities are filtered out, preventing the filter cloth from being damaged due to the transmission of particulate impurities.

[0018] By setting up two plate and frame filter presses, and connecting the feed pipes of the two plate and frame filter presses to the conveying pipe through a second reversing valve, the two plate and frame filter presses can be fed alternately during use, which can continuously process shield tunnel sludge and improve efficiency. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the filter press device for treating sludge from a subway tunnel boring machine in Example 1.

[0021] Figure 2 This is a schematic diagram of the overall structure of the filter press device for treating sludge from a subway tunnel boring machine in Example 1, from another perspective.

[0022] Figure 3 This is a schematic diagram of the air blowing mechanism and filter plate in Embodiment 1.

[0023] Figure 4 This is a schematic diagram of the overall structure of the filter press device for treating sludge from a subway tunnel boring machine in Example 2.

[0024] In the diagram: 1. Frame; 2. First fixed plate; 3. Second fixed plate; 4. Pressing plate; 5. Filter plate; 6. Hydraulic cylinder; 7. Feed pipe; 8. Water inlet and outlet pipes; 9. Traveling frame; 10. High-pressure air pump; 11. Air outlet pipe; 12. Air blowing nozzle; 13. Pulling plate trolley; 14. Water injection pipe; 15. Drain pipe; 16. First reversing valve; 17. Feed valve; 18. Slurry pump; 19. Liquid injection pipe; 20. Coarse filter screen; 21. Second reversing valve; 22. Conveying pipe; 23. Machine base; 24. Sludge hopper. Detailed Implementation

[0025] 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.

[0026] Example 1:

[0027] like Figures 1-3 As shown in this embodiment, the filter press device for treating sludge from subway tunnel boring machines includes a plate and frame filter press body and an air blowing mechanism.

[0028] The plate and frame filter press body includes a frame 1, a first fixed plate 2, a second fixed plate 3, a pressing plate 4, filter plates 5, and a hydraulic cylinder 6. The first fixed plate 2 and the second fixed plate 3 are respectively located at both ends of the frame 1. The pressing plate 4 is located close to the first fixed plate 2. Multiple filter plates 5 are located between the pressing plate 4 and the second fixed plate 3. The hydraulic cylinder 6 is fixed on the first fixed plate 2 and its telescopic end is connected to the first fixed plate 2. The second fixed plate 3 is provided with a feed pipe 7 and a water inlet and outlet pipe 8.

[0029] The air blowing mechanism includes a traveling frame 9, a high-pressure air pump 10, an air outlet pipe 11, and air blowing nozzles 12. The traveling frame 9 is arranged in an n-shape above the filter plate 5 and can move between the first fixed plate 2 and the second fixed plate 3. The air outlet pipe 11 is located below the top of the traveling frame 9 and is connected to the high-pressure air pump 10. Multiple air blowing nozzles 12 are located at the bottom of the air outlet pipe 11.

[0030] By setting an air blowing mechanism, the traveling frame 9 can move between the first fixed plate 2 and the second fixed plate 3. During the plate unloading operation, the traveling frame 9 moves to the outside of the filter plate 5 and delivers gas to the air outlet pipe 11 and the air blowing nozzle 12 through the high-pressure air pump 10, thereby blowing air onto the filter plate 5 through the air blowing nozzle 12 to help the sticky filter cake stuck on the filter cloth fall off.

[0031] In this embodiment, a plate-pulling trolley 13 is disposed between the first fixed plate 2 and the second fixed plate 3. The two plate-pulling trolleys 13 are respectively located on both sides of the filter plate 5. A plate-pulling robot is disposed on the plate-pulling trolley 13, thereby pulling the filter plate 5 to move during plate unloading. A drive assembly for moving the plate-pulling trolley 13 is disposed on the frame 1, and the traveling frame 9 moves synchronously with the plate-pulling trolley 13. The plate-pulling trolley 13 and the drive assembly for moving the plate-pulling trolley 13 are existing technologies. For example, the drive assembly can be a slide module, and its specific structure will not be described in detail here.

[0032] Specifically, the two ends of the traveling frame 9 are connected to two plate-pulling trolleys 13 respectively, so that during the plate-pulling unloading process, the traveling frame 9 and the plate-pulling trolleys 13 move together. When the plate-pulling trolleys 13 pull the filter plate 5, the high-pressure air pump 10 delivers gas to the air outlet pipe 11 and the air blowing nozzle 12, so that the air blowing nozzle 12 blows air onto the filter plate 5 to help the sticky filter cake stuck to the filter cloth fall off.

[0033] Preferably, the high-pressure air pump 10 is disposed on the top surface of the traveling frame 9, and two air outlet pipes 11 are arranged side by side below the top of the traveling frame 9. Each of the two air outlet pipes 11 is provided with an air blowing nozzle 12 at its bottom. The distance between the central axes of the two air outlet pipes 11 is slightly greater than or equal to the thickness of the filter plate 5, so that the air blowing nozzle 12 blows air to both sides of the filter plate 5.

[0034] A feed channel is provided in the middle of the filter plate 5, and water flow channels are provided at the four corners of the filter plate 5. Water inlet and outlet pipes 8 are provided on both sides of the second fixed plate 3. A water injection pipe 14 and a drain pipe 15 are provided at the end of the water inlet and outlet pipes 8 away from the second fixed plate 3. A first reversing valve 16 is provided between the water inlet and outlet pipes 8, the water injection pipe 14 and the drain pipe 15. Water enters from the water inlet and outlet pipes 8 on one side and exits from the water inlet and outlet pipes 8 on the other side, which can wash the filter cake or filter plate 5.

[0035] A feed valve 17 is installed on the feed pipe 7. A mud pump 18 is connected to the end of the feed pipe 7 furthest from the second fixed plate 3. An injection pipe 19 is connected to the inlet of the mud pump 18. A coarse filter screen 20 is installed at the end of the injection pipe 19 furthest from the mud pump 18. The coarse filter screen 20 has a cylindrical structure and is detachably connected to the injection pipe 19. The coarse filter screen 20 can be connected to the injection pipe 19 via a flange and bolts.

[0036] By installing a coarse filter screen 20 at the end of the injection pipe 19 away from the mud pump 18, the coarse filter screen 20 is placed in the sludge tank during use. Before the sludge is transported to the plate and frame filter press body, large particles of impurities are filtered to avoid damage to the filter cloth due to the transmission of particles of impurities.

[0037] Machine bases 23 are provided on both sides of the first fixed plate 2 and the second fixed plate 3. A sludge hopper 24 is provided below the filter plate 5. The sludge hopper 24 is connected to the machine base 23. A belt conveyor is installed below the sludge hopper 24. The filter cake after pressing falls into the belt conveyor through the sludge hopper 24 for conveying.

[0038] The filter press device for treating sludge from subway tunnel boring machines in this embodiment is an improvement on the existing plate and frame filter press. By setting an air blowing mechanism, the traveling frame 9 can move between the first fixed plate 2 and the second fixed plate 3. During the plate unloading operation, the traveling frame 9 moves to the outside of the filter plate 5, and gas is delivered to the air outlet pipe 11 and the air blowing nozzle 12 through the high-pressure air pump 10. This gas is then blown onto the filter plate 5 through the air blowing nozzle 12, helping the sticky filter cake adhering to the filter cloth to fall off.

[0039] Example 2:

[0040] like Figure 4 As shown, the filter press device for treating sludge from subway tunnel boring machines in this embodiment is equipped with two plate and frame filter press bodies. The two plate and frame filter press bodies are arranged side by side, and both plate and frame filter press bodies are equipped with an air blowing mechanism. The feed pipe 7 of the two plate and frame filter press bodies is provided with the same conveying pipe 22 at the end away from the second fixed plate 3. The two feed pipes 7 are connected to the conveying pipe 22 through the second reversing valve 21. The conveying pipe 22 is connected to the outlet of the mud pump 18.

[0041] By setting up two plate and frame filter press bodies, and connecting the feed pipes 7 of the two plate and frame filter press bodies to the conveying pipe 22 through the second reversing valve 21, the two plate and frame filter presses can be fed alternately during use, which can continuously process shield tunnel sludge and improve efficiency.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter press device for treating sludge from subway tunnel boring machines, characterized in that, include: The plate and frame filter press body includes a frame (1), a first fixed plate (2), a second fixed plate (3), a pressing plate (4), filter plates (5) and a hydraulic cylinder (6). The first fixed plate (2) and the second fixed plate (3) are respectively located at both ends of the frame (1). The pressing plate (4) is located close to the first fixed plate (2). A plurality of filter plates (5) are located between the pressing plate (4) and the second fixed plate (3). The hydraulic cylinder (6) is fixed on the first fixed plate (2) and its telescopic end is connected to the first fixed plate (2). The second fixed plate (3) is provided with a feed pipe (7) and a water inlet and outlet pipe (8). The air blowing mechanism includes a traveling frame (9), a high-pressure air pump (10), an air outlet pipe (11), and air blowing nozzles (12). The traveling frame (9) is arranged in an n-shape above the filter plate (5) and can move between the first fixed plate (2) and the second fixed plate (3). The air outlet pipe (11) is located below the top of the traveling frame (9) and connected to the high-pressure air pump (10). A plurality of air blowing nozzles (12) are located at the bottom of the air outlet pipe (11).

2. The filter press device for treating sludge from subway tunnel boring machines according to claim 1, characterized in that, A pull plate trolley (13) is provided between the first fixed plate (2) and the second fixed plate (3), and the traveling frame (9) moves synchronously with the pull plate trolley (13).

3. The filter press device for treating sludge from subway tunnel boring machines according to claim 2, characterized in that, The two plate-pulling trolleys (13) are located on both sides of the filter plate (5), and the two ends of the traveling frame (9) are connected to the two plate-pulling trolleys (13) respectively.

4. The filter press device for treating sludge from subway tunnel boring machines according to claim 3, characterized in that, The high-pressure air pump (10) is located on the top surface of the traveling frame (9).

5. The filter press device for treating sludge from subway tunnel boring machines according to claim 4, characterized in that, Two air outlet pipes (11) are arranged side by side below the top of the traveling frame (9). The bottom of each air outlet pipe (11) is provided with an air blowing nozzle (12). The distance between the central axes of the two air outlet pipes (11) is greater than or equal to the thickness of the filter plate (5).

6. The filter press device for treating sludge from subway tunnel boring machines according to claim 5, characterized in that, The water inlet and outlet pipe (8) is provided with a water injection pipe (14) and a drain pipe (15) at the end away from the second fixed plate (3), and a first reversing valve (16) is provided between the water inlet and outlet pipe (8), the water injection pipe (14) and the drain pipe (15).

7. The filter press device for treating sludge from subway tunnel boring machines according to claim 6, characterized in that, The feed pipe (7) is provided with a feed valve (17), and a mud pump (18) is connected to one end of the feed pipe (7) away from the second fixed plate (3). The inlet of the mud pump (18) is connected to an injection pipe (19), and a coarse filter screen (20) is provided at one end of the injection pipe (19) away from the mud pump (18).

8. The filter press device for treating sludge from subway tunnel boring machines according to claim 7, characterized in that, The coarse filter (20) has a cylindrical structure and is detachably connected to the injection tube (19).

9. The filter press device for treating sludge from subway tunnel boring machines according to claim 8, characterized in that, Two plate and frame filter presses are arranged side by side. The feed pipes (7) of the two plate and frame filter presses are connected to the conveying pipe (22) through the second reversing valve (21). The conveying pipe (22) is connected to the outlet of the mud pump (18).

10. The filter press device for treating sludge from subway tunnel boring machines according to claim 9, characterized in that, Machine bases (23) are provided on both sides of the first fixing plate (2) and the second fixing plate (3), and a mud hopper (24) is provided below the filter plate (5), and the mud hopper (24) is connected to the machine base (23).

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