Cavern excavation wastewater treatment device

Abstract

The utility model provides a waste water treatment device for cavity excavation. The cavern excavation wastewater treatment device comprises a clear water collecting system and a sewage treatment system, the clear water collecting system comprises a clear water tank and a clear water tank, a containing cavity is formed in the outer portion of the lower end of the clear water tank, a first water inlet hole is formed in the top of the clear water tank, and the clear water tank is arranged on the outer side of the clear water tank; the clear water tank is communicated with the first water inlet hole; the upper end of the sewage treatment system is contained in the containing cavity, a water inlet groove is formed in the sewage treatment system, and the sewage treatment system is communicated with the clear water tank through a connecting pipe. According to the utility model, the wastewater treatment device is designed to comprise the clear water collecting system and the sewage treatment system, clear water and sewage can be respectively collected and treated, and meanwhile, the treatment capacity is not influenced by the sewage output along with the increase or decrease of the excavation progress of the cavern.

Description

Technical Field

[0001] This utility model relates to the field of tunnel excavation technology, and in particular to a tunnel excavation wastewater treatment device. Background Technology

[0002] Cavern wastewater refers to the inrush and seepage water generated at the excavation face of underground powerhouses and waterway systems, as well as construction wastewater discharge. Tunnel inrush and seepage water are natural water existing in underground fissures caused by rock damage, excavation, and loosening during tunnel construction. These are often groundwater or confined water from bedrock or karst fissures. The volume of tunnel inrush and seepage water varies considerably, but the water quality is generally good, typically unpolluted natural water. This type of water is relatively large and can be utilized or discharged without treatment. Construction wastewater refers to the wastewater generated during the early stages of construction for the earthwork excavation of underground powerhouses and waterway systems. The discharged wastewater mainly contains suspended solids and petroleum hydrocarbons (the main pollutants are: SS: 1500mg / L~3000mg / L, petroleum hydrocarbon concentration approximately 2mg / L~10mg / L). According to the principles of green construction, tunnel inrush and seepage water are clean natural water and should be collected, utilized, or discharged separately. However, blasting or drilling operations can induce tunnel water inrush, surrounding rock seepage, and construction wastewater to be generated simultaneously. Existing methods for separating clean and dirty water often involve laying pipes on the ground and then using different pipes to separate the sewage and clean water. However, this method is expensive, and it is generally difficult to completely separate tunnel water inrush and surrounding rock seepage from construction wastewater, resulting in a large water treatment volume.

[0003] Existing cavern wastewater treatment technologies mainly include: coagulation sedimentation, inclined plate / inclined tube sedimentation, cyclone separation, magnetic coagulation sedimentation, and supermagnetic separation. These technologies often have certain problems. Specifically: coagulation sedimentation requires frequent sludge cleaning and is prone to various malfunctions; inclined plate / inclined tube sedimentation easily accumulates sludge, requiring regular backwashing, otherwise prolonged operation can affect effluent quality; cyclone separation is difficult to clean and maintain when clogged, and the effluent section uses foam or micro-sand filter media, requiring regular backwashing and replacement after adsorption saturation; also, excessive tank height makes operation and maintenance difficult; magnetic coagulation sedimentation is less effective at treating certain metal ions, consumes more energy, and has a relatively large footprint; supermagnetic separation uses magnetic materials with unstable quality, suffers from adhesion problems with tiny magnetic particles, has high water quality requirements, and has high technical and operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a wastewater treatment device for cavern excavation that collects and treats clean water and sewage separately.

[0005] The technical solution of this utility model is: a wastewater treatment device for tunnel excavation, comprising a clean water collection system and a wastewater treatment system. The clean water collection system includes a clean water tank and a clean water trough. The lower end of the clean water tank has a cavity, and the top of the clean water tank has a first water inlet. The clean water trough is arranged on the outside of the clean water tank and communicates with the first water inlet. The upper end of the wastewater treatment system is housed in the cavity, and the wastewater treatment system has a water inlet. The wastewater treatment system is connected to the clean water tank through a connecting pipe.

[0006] In the above scheme, a treatment device is designed to be independent of the cavern chamber. The treatment device is designed to include a clean water collection system and a sewage treatment system, which can collect and treat clean water and sewage separately, regardless of the amount of sewage generated. After treatment, the device can be transported to the next cavern to continue operation. There is no need to build a treatment pond, which saves land, improves treatment efficiency, reduces treatment costs, and ensures that sewage is discharged in compliance with standards.

[0007] Preferably, the wastewater treatment system includes a tank and a treatment component rotatably mounted on the upper end of the tank. Baffles are provided on both sides of the tank in the X direction, dividing the tank into two first inlet chambers and a second inlet chamber located between the two first inlet chambers. The treatment component is placed in the second inlet chamber. An inlet trough is slidably connected to the end of the tank in the Y direction and communicates with the first inlet chambers. A connecting pipe communicates with the treatment component. The X and Y directions are perpendicular to each other on the same top-view projection plane.

[0008] Preferably, the processing component includes a spindle rotatably connected to the housing, a baffle plate connected to the spindle, a reinforcing outer ring, a water-absorbing ring, and a reinforcing inner ring connected to both ends of the baffle plate and disposed inside and outside the baffle plate. Multiple ceramic membranes are connected between the reinforcing outer ring and the reinforcing inner ring at both ends, and the water-absorbing ring is connected to the connecting pipe.

[0009] Preferably, the ceramic membrane is symmetrically arranged on the upper and lower sides of the water baffle.

[0010] Preferably, the bottom of the first water inlet chamber is provided with a sedimentation tank, which extends along the X direction of the tank body.

[0011] Preferably, the bottom of the clean water tank is provided with a slide rail extending in the Y direction, and the sewage treatment system is connected to the slide rail.

[0012] Preferably, the tunnel excavation wastewater treatment device further includes a folding member located at one end of the clean water collection system in the Y direction. The folding member includes an arched part that can be folded or unfolded in the Y direction and a folding water tank that can be folded or unfolded in the Y direction. The arched part is connected to the clean water tank, and the folding water tank is connected to the clean water tank.

[0013] Preferably, the clear water tank includes a first side plate and a second side plate, and the folding water tank includes a third side plate and a fourth side plate. The first side plate and the third side plate both extend along the Y direction. The lower end of the first side plate is hinged to the clear water tank, and the lower end of the third side plate is hinged to the arched portion. The first side plate and the third side plate are connected. The second side plate is connected between the first side plate and the clear water tank, and the fourth side plate is connected between the third side plate and the arched portion. The hinged first side plate and the third side plate can be opened or closed relative to the clear water tank and the arched portion, so that the second side plate and the fourth side plate can be unfolded or folded.

[0014] Preferably, one end of the clean water tank is provided with a bumper, and the bumper is provided with a towing hook.

[0015] Preferably, the bottom of the wastewater treatment system is provided with support legs and multi-directional wheels.

[0016] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0017] 1. The wastewater treatment device for tunnel excavation is designed to include a clean water collection system and a sewage treatment system, which can collect and treat clean water and sewage separately. At the same time, the treatment capacity can be increased or decreased as the tunnel excavation progresses, and it is not affected by the amount of sewage generated.

[0018] Second, the tunnel excavation wastewater treatment device has good mobility. After the treatment in one tunnel is completed, the device can be transported to the next tunnel to continue the operation. There is no need to build a treatment pond, which saves land, improves treatment efficiency, reduces treatment costs, and enables the wastewater to be discharged in compliance with standards.

[0019] Third, the tunnel excavation wastewater treatment device separates clean and dirty wastewater at the initial stage, which reduces the total amount of wastewater to be treated, the equipment occupies a very small area, and there is no need to build permanent structures such as sedimentation tanks, resulting in lower costs.

[0020] IV. The tunnel excavation wastewater treatment device adopts a combination of multiple treatment methods such as flow baffles and ceramic membranes, which can effectively treat pollutants such as suspended solids in wastewater, and the treatment time is short and the efficiency is higher.

[0021] 5. The tunnel excavation wastewater treatment device uses foldable components to extend the length of the treatment device according to actual usage needs, thereby increasing the collection range of tunnel water inflow and surrounding rock seepage water. Attached Figure Description

[0022] Figure 1 A perspective structural schematic diagram of the tunnel excavation wastewater treatment device provided by this utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of one side projection in the Y direction;

[0024] Figure 3 for Figure 1 A schematic diagram of one side projection in the X direction;

[0025] Figure 4 This is a schematic diagram of the processing component;

[0026] Figure 5 for Figure 1 A schematic diagram of the flow-blocking plate in the middle;

[0027] Figure 6 This is a schematic diagram showing the separation of the wastewater treatment system and the clean water collection system.

[0028] In the attached diagram: 1. Clean water collection system; 11. Clean water tank; 111. First side plate; 112. Second side plate; 12. Clean water tank; 121. First inlet; 122. Outlet; 13. Cavity; 2. Sewage treatment system; 21. Tank; 22. First inlet chamber; 23. Second inlet chamber; 24. Baffle plate; 25. Treatment component; 251. Mandrel; 252. Reinforcing outer ring; 253. Reinforcing inner ring; 254. Water pump; 255. Baffle. 256. Water plate; 257. Water suction ring; 258. Ceramic membrane; 29. ​​Connecting pipe; 20. Water inlet trough; 20. Slide rail; 210. Sedimentation tank; 211. Inner pipe; 2121. Opening; 3. Slide rail; 4. Folding part; 41. Arched part; 42. Folding water trough; 421. Third side plate; 422. Fourth side plate; 5. Bumper; 6. Towing hook; 7. Support leg; 71. First support leg; 72. Second support leg; 8. Multi-directional wheel. Detailed Implementation

[0029] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0030] like Figure 1 , Figure 2 As shown, the wastewater treatment device for tunnel excavation provided in this embodiment includes a clean water collection system 1, a sewage treatment system 2, a slide rail 3, a folding component 4, a bumper 5, a traction hook 6, a support leg 7, and a multi-directional wheel 8.

[0031] The clean water collection system 1 includes a clean water trough 11 and a clean water tank 12. The clean water tank 12 is semi-circular, with a bumper 5 on its bottom outer periphery. The lower end of the annular clean water tank 12 forms a cavity 13 with a semi-circular cross-section. The top of the clean water tank 12 has multiple first water inlets 121 arranged in a row, and the clean water trough 11 is arranged on the outside of the clean water tank 12. The clean water trough 11 and the clean water tank 12 are connected through the first water inlets 121.

[0032] A towing hook 6 is provided at the front end of the clean water tank 12 in the X direction, and the towing hook 6 is connected to the bumper 5. The towing hook 6 allows the wastewater treatment device to be towed for relocation or one end of the wastewater treatment system 2 to be raised. Figure 3 The tilted position is moved to a horizontal position, and then the sewage treatment system 2 is moved laterally to separate it from the clean water collection system 1 for cleaning.

[0033] The rear end of the clean water tank 12 in the X direction is connected to the folding member 4. The folding member 4 includes an arched part 41 that can be folded or unfolded in the Y direction and a folding water tank 42 that can be folded or unfolded in the Y direction. The arched part 41 is connected to the clean water tank 12, and the folding water tank 42 is connected to the clean water tank 11.

[0034] The clear water tank 11 includes a first side plate 111 and a second side plate 112, and the folding water tank 42 includes a third side plate 421 and a fourth side plate 422. Both the first side plate 111 and the third side plate 421 extend along the Y direction. The lower end of the first side plate 111 is hinged to the clear water tank 12, and the lower end of the third side plate 421 is hinged to the arched portion 41. The first side plate 111 and the third side plate 421 are connected. The second side plate 112 connects the first side plate 111 and the clear water tank 12 in the X direction, and the fourth side plate 422 connects the third side plate 421 and the arched portion 41 in the X direction. In use, the hinged first side plate 111 and third side plate 421 can be opened relative to the clean water tank 12 and the arched portion 41, and the second side plate 112 and fourth side plate 422 can be unfolded; when not in use, the first side plate 111 is attached to the outer wall of the clean water tank 12, the third side plate 421 is attached to the outer wall of the arched portion 41, and the second side plate 112 and fourth side plate 422 are folded. The second side plate 112 and fourth side plate 422 can be made of flexible fabric. The arched portion 41 can be made of a foldable frame and a flexible fabric covering the frame.

[0035] like Figure 3As shown, the support leg 7 includes a first leg 71 and a second leg 72. The bottom of the sewage treatment system 2 is provided with the first leg 71 and a multi-directional wheel 8. The wastewater treatment device can move via the multi-directional wheel 8. The bottom of the folding member 4 is provided with the second leg 72. The second leg 72 is retractable in the height direction Z, so that the tunnel excavation wastewater treatment device is tilted when working. The tail of the folding member 4 is also provided with a towing hook 6.

[0036] like Figure 1 , Figure 4 As shown, the sewage treatment system 2 includes a housing 21, a first inlet chamber 22, a second inlet chamber 23, a baffle plate 24, a treatment component 25, a connecting pipe 26, an inlet trough 27, a slide 28, a second inlet hole 29, a sedimentation tank 210, a water pump 254, and an inner pipe 212.

[0037] The bottom of the clean water tank 12 is provided with a slide rail 3 extending in the Y direction, and the tank body 21 is connected to the slide rail 3. Figure 6 As shown, when the tank 21 slides out relative to the clean water tank 12, the sewage treatment system 2 can be cleaned.

[0038] like Figure 1 , Figure 5 As shown, baffles 24 are provided on both sides of the box 21 in the X direction, and the two baffles 24 are arranged in a V-shape inside the box 21. The baffles 24 are perforated plates, which can effectively filter sewage. The baffles 24 divide the box 21 into two first inlet chambers 22 and a second inlet chamber 23 located between the two first inlet chambers 22. The first inlet chambers 22 are triangular prisms, which can perform initial sedimentation of sewage to form a primary sedimentation chamber.

[0039] The first water inlet chamber 22 has an inner pipe 212 extending along the Y direction inside. The inner pipe 212 is located at the right angle of the triangular prism. One side of the inner pipe 212 has an opening 2121 penetrating the side wall of the first water inlet chamber 22, and the other side of the inner pipe 212 has multiple second water inlet holes 29 communicating with the first water inlet chamber 22. The outer end of the box body 21 has the slide 28. The water inlet trough 27 is adapted to the slide 28 so that it can be displaced in the X direction, so that the water inlet trough 27 extends or retracts relative to the box body 21. There are two water inlet troughs 27 arranged opposite each other in the X direction. One end of the water inlet trough 27 has a water inlet that can abut against and communicate with the side wall of the surrounding rock, and the other end of the water inlet trough 27 is connected to the opening 2121 through a flexible hose (retractable). Water from the surrounding rock enters the inlet tank 27 through the inlet, and then enters the first inlet chamber 22 through the inlet tank 27, hose, inner pipe 212, and second inlet hole 29. It then passes upward through the baffle plate 24 for the first filtration.

[0040] like Figure 4 As shown, the processing component 25 includes a spindle 251 rotatably connected to the housing 21, a baffle plate 255 connected to the spindle 251, a reinforcing outer ring 252, a water-absorbing ring 256, and a reinforcing inner ring 253 connected to both ends of the baffle plate 255 and disposed inside and outside the baffle plate 255. Multiple ceramic membranes 257 are connected between the reinforcing outer rings 252 and the reinforcing inner rings 253 at both ends. Each ceramic membrane 257 is a long rectangular plate with a certain thickness, an internal filtration chamber, and a water inlet at one end, where a water-absorbing ring 256 is disposed. Square grooves are provided on the inner sidewalls of the reinforcing outer rings 252 and the reinforcing inner rings 253 for engaging the ceramic membranes 257.

[0041] The ceramic membranes 257 are symmetrically arranged on the upper and lower sides of the baffle plate 255. The ceramic membranes 257 on the same side of the baffle plate 255 have a V-shaped structure. The water-absorbing ring 256 is connected to the connecting pipe 26, which is connected to the clean water tank 12. A water pump 254 is connected to the connecting pipe 26 to pump the water treated by the treatment component 25 into the clean water tank 12 for storage.

[0042] The treatment component 25 is disposed in the second inlet chamber 23, making the second inlet chamber 23 a secondary sedimentation chamber. The secondary sedimentation chamber can efficiently purify the water treated in the primary sedimentation chamber.

[0043] The bottom of the second water inlet chamber 23 is detachably provided with a sedimentation tank 210, which can be installed by snap-fit.

[0044] Currently, there are two main methods for tunnel excavation: drill-and-blast and tunnel boring machine (TBM). When the tunnel is being excavated, the wastewater treatment device provided by this invention is used as follows: The wastewater treatment device is towed into the tunnel by a vehicle using a towing hook 6 and multi-directional wheels 8. The wastewater treatment system 2 is placed inside. The second leg 72 is extended and fitted with the folding piece 4, and the arched part 41 of the folding piece 4 is unfolded, the clear water tank 11 and the folding water tank 42 are opened, so that the wastewater treatment device forms as shown in the diagram. Figure 3 The state shown.

[0045] The clean seepage and gushing water from the top of the cavern flows into the clear water tank 11 and the folded water tank 42 for collection, and enters the clear water tank 12 for storage through the first water inlet 121.

[0046] The inlet trough 27 extends outward to abut against the two side walls of the cavern. The sewage in the middle of the cavern enters the sewage treatment system 2 through the inlet trough 27, and after being treated by the sewage treatment system 2, it becomes clean water. The clean water is then pumped to the clean water tank 12 for storage through the connecting pipe 26.

[0047] If the water flow rate of the ceramic membrane 257 at the lower end of the baffle plate 255 decreases to half of its original value, the ceramic membrane 257 needs to be replaced. The replacement method is as follows: separate the sewage treatment system 2 from the clean water collection system 1, then rotate the treatment component 25 to interchange the positions of the upper and lower ceramic membranes 257 of the baffle plate 255, and then replace the ceramic membrane 257 that needs to be replaced.

[0048] The clean water stored in the clean water tank 12 can be drawn out through the water outlet 122 on the clean water tank 12 for comprehensive utilization or direct discharge.

[0049] Once the construction of one cavern is completed, shorten the support leg 7, then use the traction hook 6 to pull the device out of the cavern, and move it to the next cavern to repeat the above steps.

[0050] To clean the wastewater treatment device, lift the front end of the device using the traction hook 6 (the end furthest from the folding part 4), then slide the wastewater treatment system 2 to separate the clean water collection system 1 and the wastewater treatment system 2. Then, rinse the wastewater treatment system 2 with clean water. The rinsed suspended solids and other contaminants fall into the sedimentation tank 210. Finally, disassemble the sedimentation tank 210 for cleaning.

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wastewater treatment device for tunnel excavation, characterized in that, The system includes a clean water collection system (1) and a sewage treatment system (2). The clean water collection system (1) includes a clean water tank (11) and a clean water container (12). The lower end of the clean water container (12) is provided with a cavity (13). The top of the clean water container (12) is provided with a first water inlet (121). The clean water tank (11) is provided on the outside of the clean water container (12). The clean water tank (11) is connected to the first water inlet (121). The upper end of the sewage treatment system (2) is housed in the cavity (13). The sewage treatment system (2) is provided with a water inlet (27). The sewage treatment system (2) is connected to the clean water container (12) through a connecting pipe (26).

2. The tunnel excavation wastewater treatment device according to claim 1, characterized in that, The wastewater treatment system (2) includes a box (21) and a treatment component (25) rotatably mounted on the upper end of the box (21). The box (21) has baffles (24) on both sides in the X direction. The baffles (24) divide the box (21) into two first inlet chambers (22) and a second inlet chamber (23) located between the two first inlet chambers (22). The treatment component (25) is placed in the second inlet chamber (23). The inlet trough (27) is slidably connected to the end of the box (21) in the Y direction and is connected to the first inlet chamber (22). The connecting pipe (26) is connected to the treatment component (25). The X direction and the Y direction are perpendicular to each other on the same top projection plane.

3. The tunnel excavation wastewater treatment device according to claim 2, characterized in that, The processing component (25) includes a spindle (251) rotatably connected to the housing (21), a baffle plate (255) connected to the spindle (251), a reinforcing outer ring (252), a water-absorbing ring (256), and a reinforcing inner ring (253) connected to both ends of the baffle plate (255) and disposed inside and outside. Multiple ceramic membranes (257) are connected between the reinforcing outer ring (252) and the reinforcing inner ring (253) at both ends. The water-absorbing ring (256) is connected to the connecting pipe (26).

4. The tunnel excavation wastewater treatment device according to claim 3, characterized in that, The ceramic membrane (257) is symmetrically arranged on the upper and lower sides of the baffle plate (255).

5. The tunnel excavation wastewater treatment device according to claim 2, characterized in that, The bottom of the first water inlet chamber (22) is provided with a sedimentation tank (210), which extends along the X direction of the box body (21).

6. The wastewater treatment device for tunnel excavation according to claim 1, characterized in that, The bottom of the clean water tank (12) is provided with a slide rail (3) extending in the Y direction, and the sewage treatment system (2) is connected to the slide rail (3).

7. The wastewater treatment device for tunnel excavation according to claim 1, characterized in that, It also includes a folding member (4) located at one end of the clean water collection system (1) in the Y direction. The folding member (4) includes an arched part (41) that can be folded or unfolded in the Y direction and a folding water tank (42) that can be folded or unfolded in the Y direction. The arched part (41) is connected to the clean water tank (12), and the folding water tank (42) is connected to the clean water tank (11).

8. The wastewater treatment device for tunnel excavation according to claim 7, characterized in that, The clear water tank (11) includes a first side plate (111) and a second side plate (112), and the folding water tank (42) includes a third side plate (421) and a fourth side plate (422). The first side plate (111) and the third side plate (421) both extend along the Y direction. The lower end of the first side plate (111) is hinged to the clear water tank (12), and the lower end of the third side plate (421) is hinged to the arched part (41). The third side plate (421) is connected to the third side plate (421), the second side plate (112) is connected between the first side plate (111) and the clean water tank (12), and the fourth side plate (422) is connected between the third side plate (421) and the arch (41). The hinged first side plate (111) and third side plate (421) can be opened or closed relative to the clean water tank (12) and the arch (41), so that the second side plate (112) and fourth side plate (422) can be unfolded or folded.

9. The wastewater treatment device for tunnel excavation according to claim 1, characterized in that, One end of the clean water tank (12) is provided with a bumper (5), and the bumper (5) is provided with a towing hook (6).

10. The wastewater treatment device for tunnel excavation according to claim 1, characterized in that, The bottom of the sewage treatment system (2) is provided with support legs (7) and multi-directional wheels (8).

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