Tunnel construction sewage treatment device

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a tunnel construction sewage treatment device which comprises a precipitation cylinder, a flow guide channel is arranged on the inner side of the precipitation cylinder, and the flow guide channel is communicated with a buffer cylinder arranged in the middle of the precipitation cylinder; buffer plates are arranged at the bottom of the buffer cylinder at intervals, and buffer bosses are arranged on the buffer plates; a plurality of discharge holes are formed between the buffer plate and the buffer cylinder at intervals; an overflow pipe is arranged on one side of the upper part of the precipitation cylinder; a sewage pump is arranged at the bottom of the precipitation cylinder; according to the utility model, the water flow distribution can be optimized, the impact on flocculent precipitates at the bottom of the precipitation barrel is reduced, and the precipitation efficiency is improved.

Description

Technical Field

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

[0002] During tunnel construction, wastewater typically contains a large amount of suspended particles, silt, oil, and other impurities, requiring sedimentation and flocculation treatment before discharge or reuse. Traditional wastewater treatment systems usually employ sedimentation tanks for solid-liquid separation. However, due to the large flow rate and high velocity of construction wastewater, strong water flow impacts and eddies are easily generated when wastewater enters the sedimentation tank, leading to the following problems: Significant water flow disturbance and poor sedimentation: When wastewater enters the sedimentation tank at high speed, it directly impacts the bottom or walls, causing water flow turbulence and resuspending the settled sludge, reducing sedimentation efficiency. Flocs are easily broken: If the wastewater is subjected to severe disturbance during sedimentation, the formed flocs (such as alum flocs) may be destroyed, making it difficult for fine particles to settle and affecting the effluent quality. Therefore, there is an urgent need for a tunnel construction wastewater treatment system that can optimize water flow distribution, reduce impact, and improve sedimentation efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a wastewater treatment device for tunnel construction that can optimize water flow distribution, reduce the impact on flocculated sediment at the bottom of the sedimentation tank, and improve sedimentation efficiency.

[0004] The present invention adopts the following technical solution:

[0005] A wastewater treatment device for tunnel construction includes a sedimentation tank, an inner channel for guiding the flow of water through which a buffer tank located in the middle of the sedimentation tank is connected; buffer plates are spaced apart at the bottom of the buffer tank, and buffer protrusions are provided on the buffer plates; multiple discharge holes are spaced apart between the buffer plates and the buffer tank; an overflow pipe is provided on one side of the upper part of the sedimentation tank, and a sewage pump is provided at the bottom of the sedimentation tank.

[0006] Preferably, the bottom of the sedimentation cylinder is formed with a conical sedimentation tank, and the sewage pump is installed on the sedimentation tank.

[0007] Preferably, the buffer boss is a cone shape with the tip pointing upwards.

[0008] Preferably, the lower diameter of the buffer cylinder is larger than its upper diameter.

[0009] Preferably, the flow guiding channel includes an arc segment arranged along the circumference of the inner wall of the sedimentation cylinder, and a horizontal segment disposed at the end of the arc segment, and the flow guiding channel is connected to the buffer cylinder through the horizontal segment.

[0010] Preferably, the flow channel is provided with multiple flow diversion holes.

[0011] Preferably, the diversion hole is disposed within the arc segment of the flow guiding channel and is located on the side close to the inner wall of the sedimentation cylinder.

[0012] Preferably, the density of the diversion holes gradually increases from the end of the flow channel away from the buffer cylinder to the end closer to the buffer cylinder.

[0013] Preferably, a diversion pipe is provided at the bottom of the diversion hole, and the buffer boss is provided at the bottom of the diversion pipe.

[0014] Preferably, the lower diameter of the diverter is larger than its upper diameter.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by setting a buffer cylinder inside the sedimentation cylinder and setting a buffer protrusion at the bottom of the buffer cylinder, the slurry water entering the sedimentation cylinder can be guided and evenly distributed, so that the slurry water can be discharged in an orderly manner from the gap between the bottom plate and the buffer cylinder to the surrounding area, reducing the impact and disturbance on the sediment at the bottom of the sedimentation cylinder and the supernatant at the top, thereby better achieving the separation and discharge of slurry water. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0017] Figure 2 This is a cross-sectional view of the sedimentation cylinder according to an embodiment of this application;

[0018] Figure 3 This is a top view of an embodiment of this application. Detailed Implementation

[0019] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments:

[0020] like Figures 1 to 3 As shown, the tunnel construction wastewater treatment device of this utility model includes a sedimentation tank 1, a flow channel 2 is provided inside the sedimentation tank 1, the flow channel 2 is connected to a buffer tank 3 located in the middle of the sedimentation tank 1, and a water supply pipe 4 is provided at the end of the flow channel 2 away from the buffer tank 3; buffer plates 5 are provided at intervals at the bottom of the buffer tank 3, and buffer bosses 6 are provided on the buffer plates 5. The buffer bosses 6 are coaxially arranged with the buffer tank 3 and extend upward into the buffer tank 3; multiple discharge holes are formed at intervals between the buffer plates 5 and the buffer tank 3 to discharge the slurry input into the sedimentation tank 1; an overflow pipe 7 is provided on one side of the upper part of the sedimentation tank 1 for overflow discharge of the supernatant, and the height of the overflow pipe 7 is lower than the height of the top inlet end of the buffer tank 3; a sewage pump is provided at the bottom of the sedimentation tank 1 for outputting and discharging the slurry settled at the bottom of the sedimentation tank 1.

[0021] During operation, the slurry enters the buffer tank 3 through the guide channel 2. Flowing downwards along the buffer tank 3, it contacts the buffer protrusion 6, offsetting the impact force generated by the downward flow of the slurry. The slurry then flows in a different direction along the side wall of the buffer protrusion 6, and is subsequently discharged orderly through the discharge hole. This significantly reduces the impact force generated when the slurry is discharged into the sedimentation tank 1, preventing the formation of eddies and thus minimizing disturbance to the sediment and supernatant, ensuring effective solid-liquid separation. During wastewater treatment, flocculants are added when the slurry is introduced into the sedimentation tank 1 to promote the coagulation of particles in the slurry, accelerate the sedimentation separation rate, and improve the slurry-water separation effect.

[0022] In this embodiment, a conical sedimentation tank 8 is formed at the bottom of the sedimentation cylinder 1 to facilitate the smooth discharge of the sludge settled therein. A sewage pump is installed on the sedimentation tank 8, and a buffer cylinder 3 extends downwards within the sedimentation cylinder 1, positioned above the sedimentation tank 8. Furthermore, the buffer boss 6 in this embodiment is a cone with its tip pointing upwards. The conical buffer boss 6, through its special geometry, effectively reduces the kinetic energy of the water flow during impact. When the water flow impacts the buffer boss 6, the conical curved surface design disperses the force of the water flow, reducing the intensity of the direct impact and thus lessening the impact on the lower structure. Simultaneously, the conical buffer boss 6 design also allows for a more uniform distribution of the water flow, reducing turbulence during the impact process. This helps improve water flow conditions, reduces the occurrence of eddies and turbulence, and makes the water flow more stable, allowing the sludge water to be stably discharged from the discharge hole along its slope, reducing disturbance to the sediment.

[0023] like Figure 2 As shown, in this embodiment, the lower diameter of the buffer cylinder 3 is larger than its upper diameter. By expanding the diameter, the flow rate of the mud water can be reduced, thus reducing the force required for the mud water to drain from the sedimentation cylinder 1 and further reducing disturbance to the sediment inside the buffer cylinder 3. The bottom diameter of the buffer boss 6 is not smaller than the bottom diameter of the buffer cylinder 3 to provide sufficient buffer space for the mud water.

[0024] Furthermore, the flow guiding channel 2 includes an arc segment arranged along the circumference of the inner wall of the sedimentation cylinder 1, and a horizontal segment located at the end of the arc segment. The flow guiding channel 2 is connected to the buffer cylinder 3 through the horizontal segment. The optimized design of the flow guiding channel 2 can also dissipate some of the kinetic energy during the constant transport of slurry, reducing the force required for the slurry to enter the sedimentation cylinder 1. Multiple diversion holes 9 are provided within the flow guiding channel 2, located within the arc segment connecting the flow guiding channel 2 to the inner wall of the buffer cylinder 3. The diversion holes 9 are positioned near the inner wall of the sedimentation cylinder 1, allowing the diverted slurry to slowly fall along the inner wall of the sedimentation cylinder 1, reducing disturbance to the supernatant. The diversion holes 9 allow for partial pre-diversion of the slurry during its transport to the buffer cylinder 3, ensuring a reduced amount of slurry entering the buffer cylinder 3 during the constant transport of slurry, while also reducing the kinetic energy of the slurry, thereby reducing disturbance to the slurry at the bottom of the sedimentation cylinder 1.

[0025] Because the water flow is more turbulent near the water supply pipe 4 and relatively gentler at the far end, the flow velocity difference at each diversion hole 9 is reduced to decrease the slurry water's descent. The density of the diversion holes 9 gradually increases from the end of the guide channel 2 away from the buffer cylinder 3 to the end closer to the buffer cylinder 3; that is, the diversion holes 9 are sparser near the water supply pipe 4 and more densely packed at the end away from the water supply pipe 4. Furthermore, a diversion pipe 10 is connected to the bottom of the diversion hole 9. The lower diameter of the diversion pipe 10 is larger than its upper diameter. A buffer boss 6 is provided at the bottom of the diversion pipe 10, and a discharge hole is formed between the buffer boss 6 and the diversion pipe 10. The structure of the buffer boss 6 and the diversion pipe 10 is the same as that of the buffer cylinder 3 and its bottom buffer boss 6, so as to guide the slurry water flowing out of the diversion hole 9 to the bottom of the sedimentation tank 1, achieving the settling of flocculants, reducing the disturbance to the supernatant caused by the height difference, and improving the smoothness of the slurry water entering the sedimentation tank 1.

[0026] When this utility model is in operation, the mud slurry is fed into the guide channel 2 through the water supply pipe 4. During the flow, part of the mud slurry is diverted through the diversion hole 9, and the rest enters the buffer cylinder 3 and falls along the buffer cylinder 3. It collides and buffers with the buffer protrusion 6 set at the bottom of the buffer cylinder 3, which cancels out the kinetic energy of its descent and changes its flow direction. This allows the mud slurry to be stably discharged from the discharge hole along the slope of the buffer protrusion 6. This effectively reduces the impact on the sediment at the bottom of the sedimentation cylinder 1 and the damage to the flocs during the mud slurry discharge process, ensuring the solid-liquid separation effect. Finally, the separated supernatant is discharged to the subsequent section through the overflow pipe 7, and the settled mud slurry is pumped out by the mud pump and transported to the designated location.

Claims

1. A sewage treatment device for tunnel construction, characterized in that: The system includes a sedimentation tank, an inner channel for guiding the flow, which is connected to a buffer tank located in the middle of the sedimentation tank; buffer plates are spaced apart at the bottom of the buffer tank, and buffer protrusions are provided on the buffer plates; multiple discharge holes are spaced apart between the buffer plates and the buffer tank; an overflow pipe is provided on one side of the upper part of the sedimentation tank, and a sewage pump is provided at the bottom of the sedimentation tank.

2. The tunnel construction wastewater treatment device according to claim 1, characterized in that: The bottom of the sedimentation cylinder has a conical sedimentation tank, and the sewage pump is installed on the sedimentation tank.

3. The tunnel construction wastewater treatment device according to claim 1, characterized in that: The buffer boss is a cone shape with the tip pointing upwards.

4. The tunnel construction wastewater treatment device according to claim 3, characterized in that: The lower diameter of the buffer cylinder is larger than its upper diameter.

5. The tunnel construction wastewater treatment device according to claim 1, characterized in that: The flow channel includes an arc segment arranged along the circumference of the inner wall of the sedimentation cylinder, and a horizontal segment disposed at the end of the arc segment. The flow channel is connected to the buffer cylinder through the horizontal segment.

6. The tunnel construction wastewater treatment device according to claim 5, characterized in that: The flow channel is provided with multiple flow diversion holes.

7. The tunnel construction wastewater treatment device according to claim 6, characterized in that: The diversion hole is located within the arc segment of the flow guide channel and is positioned on the side close to the inner wall of the sedimentation cylinder.

8. The tunnel construction wastewater treatment device according to claim 7, characterized in that: The density of the diversion holes gradually increases from the end of the flow channel away from the buffer cylinder to the end closer to the buffer cylinder.

9. The tunnel construction wastewater treatment device according to claim 8, characterized in that: The bottom of the diversion hole is provided with a diversion pipe, and the bottom of the diversion pipe is provided with the buffer boss.

10. The tunnel construction wastewater treatment device according to claim 9, characterized in that: The lower diameter of the diverter tube is larger than its upper diameter.

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