TBM sewage pretreatment device

Abstract

The utility model discloses TBM shield machine sewage pretreatment equipment belongs to shield machine technical field, specifically including sewage collection module and sewage pretreatment module, the sewage pretreatment module includes filter module, the tank of waiting for discharging and the outer discharge pump, the filter module is connected with the sewage collection module through the lifting pipeline, the filter module is connected with the tank of waiting for discharging through the conveying pipeline, the water outlet of the tank of waiting for discharging is connected with the water inlet of the outer discharge pump, and the water outlet of the outer discharge pump is connected with the drain pipeline, the utility model discloses can effectively remove the solid particle in the sewage before the sewage enters the outer discharge pipeline, has reduced the abrasion and corrosion to the drainage system, has prolonged the service life of drainage system significantly, and the risk of drainage system blockage has been reduced greatly, has guaranteed the smooth of drainage system and the driving -in efficiency of TBM shield machine, has avoided the loss of shutdown because of the paralysis of drainage system.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel boring machine technology, specifically relating to sewage pretreatment equipment for TBM tunnel boring machines. Background Technology

[0002] During the construction of TBM (Shield Tunneling) tunnels, a large amount of wastewater is generated. This wastewater mainly originates from groundwater seepage, equipment cooling water, cleaning water, and residual grout from the shield. This wastewater contains a large amount of impurities such as mud, grease, and suspended solids.

[0003] Existing TBMs discharge working wastewater to the surface mainly by a pre-laid permanent external drainage pipeline system that runs through the entire tunnel. However, the high-speed flow of wastewater containing a large number of hard solid particles in the long-distance drainage system will severely wear down and corrode the pipe walls and pump valves of the drainage system, resulting in a shortened lifespan of the drainage system and extremely high maintenance and replacement costs. Furthermore, once the drainage system is blocked, the entire drainage system may be paralyzed, requiring work to be stopped for dredging, which seriously affects the continuous tunneling efficiency of the TBM.

[0004] Therefore, there is a need to provide a wastewater pretreatment device for TBM tunnel boring machines to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a wastewater pretreatment device for TBM (tunnel boring machine), which effectively removes solid particles from wastewater, extends the service life of the drainage system, avoids downtime caused by drainage system blockages, and ensures continuous and efficient tunneling of the TBM.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sewage pretreatment device for a TBM tunnel boring machine, comprising a sewage collection module and a sewage pretreatment module, wherein the sewage collection module and the sewage pretreatment module are both integrated and installed on the last section of the TBM tunnel boring machine's rear trailer. The wastewater pretreatment module includes a filtration module, a discharge tank, and an external discharge pump. The filtration module is connected to the wastewater collection module via a lift pipe and to the discharge tank via a delivery pipe. The outlet of the discharge tank is connected to the inlet of the external discharge pump, and the outlet of the external discharge pump is connected to a drainage pipe.

[0007] Preferably, the sewage collection module includes a water pump, a water storage tank, and a lift pump. The inlet end of the water pump is connected to a water pumping pipe, the outlet end of the water pump is connected to the inlet end of the water storage tank, the outlet end of the water storage tank is connected to the inlet end of the lift pump, and the outlet end of the lift pump is connected to the inlet end of the lift pipe.

[0008] Preferably, both the lifting pipe and the pumping pipe are equipped with flow regulating valves for adjusting the flow rate.

[0009] Preferably, a mud discharge valve is fixedly connected to the bottom of the water storage tank.

[0010] Preferably, the filtration module includes a dewatering screen and a belt conveyor. The feed inlet of the dewatering screen is connected to the water outlet of the lifting pipe, the water outlet of the dewatering screen is connected to the water inlet of the conveying pipe, and the slag outlet of the dewatering screen is located above the belt conveyor.

[0011] Preferably, the tank to be discharged is equipped with a water quality detector to monitor in real time whether the treated water quality meets the discharge standards.

[0012] Preferably, it also includes a water recycling module for transporting pretreated water to the front of the TBM for recycling.

[0013] Preferably, the water recycling module includes a recycling pump and a recycling pipeline, the inlet of the recycling pump is connected to the outlet of the tank to be drained, and the inlet of the recycling pipeline is connected to the outlet of the recycling pump.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention can effectively remove solid particles from sewage before it enters the external discharge pipe, reducing wear and corrosion on the drainage system, significantly extending the service life of the drainage system, and greatly reducing the risk of drainage system blockage. It ensures smooth drainage and the tunneling efficiency of the TBM shield machine, and avoids work stoppage losses caused by drainage system failure. Attached Figure Description

[0015] 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: Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model; In the diagram: 1. Water storage tank; 2. Tank to be drained; 3. Water pump; 4. Water pumping pipe; 5. Booster pump; 6. Booster pipe; 7. Dewatering screen; 8. Belt conveyor; 9. Conveying pipe; 10. External discharge pump; 11. Drainage pipe; 12. Recovery pump; 13. Recovery pipe. Detailed Implementation

[0016] 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.

[0017] Example 1 Please see Figure 1 This embodiment provides the following technical solution: a sewage pretreatment device for a TBM tunnel boring machine, including a sewage collection module and a sewage pretreatment module, both of which are integrated and installed on the last section of the TBM tunnel boring machine's trailer.

[0018] The wastewater pretreatment module includes a filtration module, a waiting tank 2, and an external pump 10. The filtration module is connected to the wastewater collection module via a lifting pipe 6 and to the waiting tank 2 via a conveying pipe 9. The wastewater collection module includes a pump 3, a storage tank 1, and a lift pump 5. The inlet of the pump 3 is connected to a pumping pipe 4, and the outlet of the pump 3 is connected to the inlet of the storage tank 1. The outlet of the storage tank 1 is connected to the inlet of the lift pump 5, and the outlet of the lift pump 5 is connected to the inlet of the lifting pipe 6. The pump 3 can draw wastewater from the collection point in the tunnel into the storage tank 1. The sludge discharge valve fixedly connected to the bottom of the storage tank 1 can be opened periodically to discharge the thick sludge. The lift pump 5 can pump out the wastewater from the storage tank 1 and allow it to enter the filtration module.

[0019] The filtration module includes a dewatering screen 7 and a belt conveyor 8. The inlet of the dewatering screen 7 is connected to the outlet of the lifting pipe 6, and the outlet of the dewatering screen 7 is connected to the inlet of the conveying pipe 9. Through the dewatering screen 7, solid particles such as fine sand and mud in the sewage are separated by vibration and screening to form slag with low water content. The filtered water is then transported to the tank 2 to be discharged through the conveying pipe 9.

[0020] The slag outlet of the dewatering screen 7 is located above the belt conveyor 8. The belt conveyor 8 can transport the slag falling from the slag outlet continuously to the designated slag collection point or slag truck.

[0021] The outlet of the waiting tank 2 is connected to the inlet of the external drainage pump 10. The outlet of the external drainage pump 10 is connected to the drainage pipe 11. Through the external drainage pump 10, the filtered water can be transported into the external drainage pipe. In this way, the filtered sewage enters the external drainage pipe, which reduces the wear and corrosion of the drainage system, significantly extends the service life of the drainage system, and greatly reduces the risk of drainage system blockage. This ensures the smooth flow of the drainage system and the tunneling efficiency of the TBM shield machine, and avoids the downtime losses caused by the paralysis of the drainage system.

[0022] In some embodiments, both the water storage tank 1 and the tank to be drained 2 are equipped with water level detectors to detect the liquid level in the water storage tank 1 and the tank to be drained 2 in real time.

[0023] In some embodiments, both the lifting pipe 6 and the pumping pipe 4 are equipped with flow regulating valves for adjusting the flow rate. The flow regulating valves can be used to adjust the water flow rate in the lifting pipe 6 and the pumping pipe 4 respectively.

[0024] In some embodiments, a water quality detector is installed in the tank 2 to monitor in real time whether the treated water quality meets the discharge standard. When the water quality detector detects that the water quality meets the preset discharge standard, the water in the tank 2 is discharged.

[0025] Example 2 Please see Figure 2 To further improve water resource utilization, a water recycling module is also set up to transport pre-treated water to the front of the TBM for recycling. The water recycling module includes a recycling pump 12 and a recycling pipe 13. The inlet of the recycling pump 12 is connected to the outlet of the tank 2 to be discharged, and the inlet of the recycling pipe 13 is connected to the outlet of the recycling pump 12. When the water in the tank 2 to be discharged is tested and found to be sufficient for cooling, flushing and other water requirements of the TBM itself, even if it does not meet the strict discharge standards, the recycling pump 12 can be started to pump this water through the recycling pipe 13 to the front working area of ​​the TBM for recycling by the cutterhead cooling system, dust removal system and other systems, thus forming a closed-loop water resource management system.

[0026] The working principle of this utility model is as follows: When the sewage generated by the TBN shield machine during tunnel excavation, such as cutterhead cooling water, equipment flushing water, and ground seepage water, is collected at the water collection point, the water pump 3 is started through the control system of the TBN shield machine, so that the sewage is collected into the water storage tank 1 through the water pumping pipe 4. As an initial buffer container, the wastewater in the storage tank 1 is allowed to settle briefly. During this time, the denser solid particles in the wastewater, such as coarse sand and gravel, will naturally settle to the bottom of the storage tank 1 under the action of gravity. By periodically opening the sludge discharge valve at the bottom of the storage tank 1, the accumulated thick sludge can be discharged to prevent the storage tank 1 from becoming clogged and to reduce the load on subsequent fine treatment. The control system of the TBN tunnel boring machine starts the lifting pump 5, which allows the sewage in the water storage tank 1 to enter the dewatering screen 7 through the lifting pipe 6. The dewatering screen 7 uses high-frequency vibration to allow water and finer particles to pass through the screen, while larger solid particles such as fine sand and mud that cannot pass through the screen are trapped on the screen surface. Under the action of vibration, these solids are dewatered and transported to the slag outlet, and finally fall onto the belt conveyor 8 below. The belt conveyor 8 continuously transports out the dewatered solid slag. The water quality detector installed in the waiting tank 2 starts working, monitoring key indicators in the water in real time, such as turbidity and suspended solids (SS) content. At this time, the system makes intelligent decisions based on the monitoring data: If the water quality data meets the preset environmental discharge standards, the external discharge pump 10 will be automatically or manually started by the operator to discharge the qualified water through the drainage pipe 11 to the receiving system or municipal pipe network outside the tunnel.

[0027] If the water quality is good but does not fully meet the discharge standards, or if the construction site has strict water conservation requirements, the system can activate the water recycling module. The recycling pump 12 draws treated water from the waiting tank 2 and transports it to the front working area of ​​the TBM through the recycling pipeline 13. The recycled water is used in construction processes where water quality requirements are not high, such as cutterhead cooling, spray dust removal, and shield grouting, thereby replacing some of the fresh water and realizing closed-loop management and recycling of water resources.

[0028] 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. Wastewater pretreatment equipment for TBM (tunnel boring machine), characterized in that: It includes a sewage collection module and a sewage pretreatment module, both of which are integrated and installed on the last section of the TBM tunnel boring machine's trailer. The wastewater pretreatment module includes a filtration module, a discharge tank (2), and an external discharge pump (10). The filtration module is connected to the wastewater collection module through a lifting pipe (6). The filtration module is connected to the discharge tank (2) through a conveying pipe (9). The outlet of the discharge tank (2) is connected to the inlet of the external discharge pump (10). The outlet of the external discharge pump (10) is connected to a drainage pipe (11).

2. The wastewater pretreatment equipment for TBM tunnel boring machines according to claim 1, characterized in that: The sewage collection module includes a water pump (3), a water storage tank (1), and a lift pump (5). The water pump (3) has a water inlet connected to a water pumping pipe (4), the water outlet of the water pump (3) is connected to the water inlet of the water storage tank (1), the water outlet of the water storage tank (1) is connected to the water inlet of the lift pump (5), and the water outlet of the lift pump (5) is connected to the water inlet of the lift pipe (6).

3. The wastewater pretreatment equipment for TBM tunnel boring machines according to claim 2, characterized in that: Both the lifting pipe (6) and the pumping pipe (4) are equipped with flow regulating valves for adjusting the flow rate.

4. The wastewater pretreatment equipment for TBM tunnel boring machines according to claim 2, characterized in that: A mud discharge valve is fixedly connected to the bottom of the water storage tank (1).

5. The wastewater pretreatment equipment for TBM tunnel boring machines according to claim 1, characterized in that: The filtration module includes a dewatering screen (7) and a belt conveyor (8). The feed inlet of the dewatering screen (7) is connected to the water outlet of the lifting pipe (6), the water outlet of the dewatering screen (7) is connected to the water inlet of the conveying pipe (9), and the slag outlet of the dewatering screen (7) is located above the belt conveyor (8).

6. The wastewater pretreatment equipment for TBM tunnel boring machines according to claim 1, characterized in that: The tank to be discharged (2) is equipped with a water quality detector to monitor in real time whether the treated water quality meets the discharge standards.

7. The wastewater pretreatment equipment for TBM tunnel boring machines according to claim 1, characterized in that: It also includes a water recycling module for transporting pretreated water to the front of the TBM for recycling.

8. The wastewater pretreatment equipment for TBM tunnel boring machines according to claim 7, characterized in that: The water recycling module includes a recycling pump (12) and a recycling pipe (13). The inlet of the recycling pump (12) is connected to the outlet of the tank to be drained (2), and the inlet of the recycling pipe (13) is connected to the outlet of the recycling pump (12).

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