Integrated zero-discharge treatment device for tunnel sewage

Abstract

The utility model relates to an integrated zero-discharge treatment device for tunnel sewage and belongs to the technical field of sewage treatment. Comprising a treatment tank, and the treatment tank is independently provided with a magnetic coagulation reaction area, a magnetic separation precipitation area and a fiber rotary disc filtering area from top to bottom; wherein the magnetic coagulation reaction area is communicated with the pretreatment unit, and a sludge outlet of the fiber turntable filtering area is communicated with the sludge concentration tank; the dosing mechanism is arranged at the top of the treatment tank and is communicated with the magnetic coagulation reaction area; the electromagnetic separator is arranged at the bottom of the magnetic separation settling zone, an electromagnetic outlet of the electromagnetic separator is connected with a dosing mechanism through a screw conveyer, and a sludge outlet of the electromagnetic separator is connected with a sludge concentration tank; and a fiber turntable is arranged in the fiber turntable filtering area. The device is efficient and energy-saving, the precipitation time is greatly shortened by magnetic coagulation, and the comprehensive energy consumption is low due to low-pressure filtration of the fiber turntable.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an integrated zero-discharge treatment device for tunnel wastewater. Background Technology

[0002] With increasingly stringent environmental protection requirements, wastewater generated during tunnel construction and operation needs to be treated efficiently and discharged in a zero-discharge manner. Traditional wastewater treatment plants suffer from problems such as low treatment efficiency, large footprint, and low automation, making it difficult to meet the wastewater treatment needs of tunnels.

[0003] Therefore, there is an urgent need to develop new types of wastewater treatment equipment that are efficient, intensive, and sustainable. Utility Model Content

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An integrated zero-discharge sewage treatment device for tunnels includes a pretreatment unit for intercepting large particulate impurities in sewage, a treatment unit for treating sewage, and a sludge thickening tank for treating sludge; the outlet end of the pretreatment unit is connected to the inlet end of the treatment unit, and the sludge thickening tank is connected to the sludge outlet of the treatment unit.

[0006] The processing unit includes a processing tank, which is independently equipped with a magnetic coagulation reaction zone, a magnetic separation sedimentation zone, and a fiber disc filtration zone from top to bottom; wherein, the magnetic coagulation reaction zone is connected to the pretreatment unit, and the sludge outlet of the fiber disc filtration zone is connected to the sludge thickening tank.

[0007] A dosing mechanism is located at the top of the treatment tank and is connected to the magnetic coagulation reaction zone;

[0008] An electromagnetic separator is provided at the bottom of the magnetic separation sedimentation zone. The electromagnetic outlet of the electromagnetic separator is connected to the dosing mechanism via a screw conveyor, and the sludge outlet of the electromagnetic separator is connected to the sludge thickening tank.

[0009] A fiber turntable mechanism is disposed in the fiber turntable filtration area.

[0010] Furthermore, a stirring mechanism is also provided in the magnetic coagulation reaction zone, the stirring mechanism including a first drive motor and a first stirring shaft;

[0011] The first drive motor is located at the top of the processing tank and is fixedly installed on the processing tank; the first end of the first stirring shaft is drivenly connected to the drive end of the first drive motor; the second end of the first stirring shaft passes through the top wall of the processing tank and is located in the magnetic coagulation reaction zone, and the first stirring shaft is rotatably connected to the top wall of the processing tank; a stirring blade assembly is provided on the outer surface of the first stirring shaft.

[0012] Furthermore, the stirring blade assembly includes a paddle-type stirring blade assembly and a frame-type stirring blade assembly, which are arranged sequentially from top to bottom on the outer surface of the first stirring shaft.

[0013] Furthermore, the magnetic separation sedimentation zone includes a sedimentation chamber and a buffer chamber; the buffer chamber is located on one side of the sedimentation chamber, the top of the buffer chamber is connected to the magnetic coagulation reaction zone, and the bottom of the buffer chamber is connected to the sedimentation chamber; the top of the sedimentation chamber is connected to the fiber disc filtration zone through a pipeline.

[0014] The electromagnetic separator is located at the bottom of the sedimentation chamber.

[0015] Furthermore, the sedimentation chamber includes an overflow weir area, an inclined plate area, and a conical sludge collection area connected sequentially from top to bottom;

[0016] The electromagnetic separator is located at the bottom center of the conical sludge collection zone, and several inclined plates are evenly distributed in the inclined plate zone; the overflow weir zone is provided with an overflow weir, and one end of the overflow weir is provided with an outlet and is connected to the fiber disc filter zone.

[0017] Furthermore, multiple guide plates are inclinedly arranged inside the buffer cavity.

[0018] Furthermore, the fiber disc filtration zone is divided into a dispersion chamber and a filtration chamber by a partition plate; the dispersion chamber is located above the filtration chamber, and the partition plate is provided with multiple water outlet holes; the fiber disc mechanism is disposed on the filtration chamber.

[0019] Furthermore, the fiber turntable mechanism includes a second drive motor and a first rotating shaft;

[0020] The second drive motor is located at the bottom of the processing tank and is fixedly installed on the processing tank; the first end of the first rotating shaft is drivenly connected to the drive end of the second drive motor; the second end of the first rotating shaft passes through the top wall of the processing tank and is located in the filter chamber; the first rotating shaft is rotatably connected to the bottom wall of the processing tank; multiple sets of fiber filter discs are provided on the outer surface of the first rotating shaft.

[0021] Furthermore, a negative pressure suction backwashing mechanism is also provided at the bottom of the fiber disc filtration zone, and the negative pressure suction backwashing mechanism is connected to the sludge thickening tank through a pipeline.

[0022] Beneficial effects:

[0023] 1. High efficiency and energy saving: Magnetic coagulation significantly shortens the sedimentation time, and fiber disc filtration operates at low pressure, resulting in low overall energy consumption.

[0024] 2. Zero discharge: Reduce pollutant discharge through water reuse and sludge reduction.

[0025] 3. Small footprint: The integrated design saves space and is suitable for scenarios with limited land. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an integrated zero-discharge treatment device for tunnel sewage according to this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the fiber filter disc of this utility model;

[0028] The components include: 1. Pretreatment unit; 2. Treatment tank; 3. Sludge thickening tank; 4. Magnetic coagulation reaction zone; 41. Dosing mechanism; 42. Stirring mechanism; 421. Paddle agitator blade assembly; 422. Frame agitator blade assembly; 5. Magnetic separation sedimentation zone; 51. Buffer chamber; 52. Sedimentation chamber; 521. Electromagnetic separator; 522. Inclined plate zone; 523. Overflow weir; 6. Fiber disc filtration zone; 61. Dispersion chamber; 62. Fiber chamber; 621. Fiber disc mechanism; 6211. Fiber filter disc; 63. Divider plate; 64. Negative pressure suction backwashing mechanism. Detailed Implementation

[0029] Example 1

[0030] refer to Figures 1-2 An integrated zero-discharge sewage treatment device for tunnels includes a pretreatment unit 1 for intercepting large particulate impurities in sewage, a treatment unit for treating sewage, and a sludge thickening tank 3 for treating sludge; the outlet end of the pretreatment unit 1 is connected to the inlet end of the treatment unit, and the sludge thickening tank 3 is connected to the sludge outlet of the treatment unit.

[0031] The treatment unit includes a treatment tank 2, which is independently equipped with a magnetic coagulation reaction zone 4, a magnetic separation sedimentation zone 5, and a fiber disc filtration zone 6 from top to bottom; wherein, the magnetic coagulation reaction zone 4 is connected to the pretreatment unit 1, and the sludge outlet of the fiber disc filtration zone 6 is connected to the sludge thickening tank 3.

[0032] The dosing mechanism 41 is located on the top of the treatment tank 2 and is connected to the magnetic coagulation reaction zone 4;

[0033] Electromagnetic separator 521 is located at the bottom of magnetic separation sedimentation zone 5. The electromagnetic outlet of electromagnetic separator 521 is connected to dosing mechanism 41 via screw conveyor. The sludge outlet of electromagnetic separator 521 is connected to sludge thickening tank 3.

[0034] Fiber turntable mechanism 621 is located in fiber turntable filtration zone 6.

[0035] In this embodiment, the pretreatment unit 1 is equipped with a screen, which is used to intercept large particulate impurities in the sewage.

[0036] Preferably, a stirring mechanism 42 is also provided in the magnetic coagulation reaction zone 4, the stirring mechanism 42 including a first drive motor and a first stirring shaft;

[0037] The first drive motor is located on the top of the processing tank 2 and is fixedly installed on the processing tank 2; the first end of the first stirring shaft is drivenly connected to the drive end of the first drive motor; the second end of the first stirring shaft passes through the top wall of the processing tank 2 and is located in the magnetic coagulation reaction zone 4, and the first stirring shaft is rotatably connected to the top wall of the processing tank 2; the outer surface of the first stirring shaft is provided with a stirring blade assembly.

[0038] Preferably, the stirring blade assembly includes a paddle-type stirring blade assembly 421 and a frame-type stirring blade assembly 422, which are arranged sequentially from top to bottom on the outer surface of the first stirring shaft.

[0039] Preferably, the magnetic separation sedimentation zone 5 includes a sedimentation chamber 52 and a buffer chamber 51; the buffer chamber 51 is disposed on one side of the sedimentation chamber 52, the top end of the buffer chamber 51 is connected to the magnetic coagulation reaction zone 4, and the bottom end of the buffer chamber 51 is connected to the sedimentation chamber 52; the top of the sedimentation chamber 52 is connected to the fiber disc filtration zone 6 through a pipeline.

[0040] The electromagnetic separator 521 is located at the bottom of the sedimentation chamber 52.

[0041] Preferably, the sedimentation chamber 52 includes an overflow weir area, an inclined plate area 522 and a conical sludge collection area connected sequentially from top to bottom;

[0042] The electromagnetic separator 521 is located at the bottom center of the conical sludge collection zone, and several inclined plates are evenly distributed in the inclined plate zone 522; the overflow weir zone is provided with an overflow weir 523, and one end of the overflow weir 523 is provided with an outlet and is connected to the fiber disc filter zone 6.

[0043] In this embodiment, the inclined plate adopts a honeycomb inclined plate assembly, the inclined plate material is polypropylene, and the inclination angle is 60°.

[0044] Preferably, multiple guide plates are inclinedly arranged inside the buffer cavity 51.

[0045] Preferably, the fiber disc filtration zone 6 is divided into a dispersion chamber 61 and a filtration chamber 62 by a partition plate 63; the dispersion chamber 61 is located above the filtration chamber 62, and the partition plate 63 is provided with multiple water outlet holes; the fiber disc mechanism 621 is provided on the filtration chamber 62.

[0046] In this embodiment, the water outlet is a round hole that is narrow at the top and wide at the bottom.

[0047] Preferably, the fiber turntable mechanism 621 includes a second drive motor and a first rotating shaft;

[0048] The second drive motor is located at the bottom of the processing tank 2 and is fixedly installed on the processing tank 2; the first end of the first rotating shaft is driven and connected to the drive end of the second drive motor; the second end of the first rotating shaft passes through the top wall of the processing tank 2 and is located in the filter chamber 62, and the first rotating shaft is rotatably connected to the bottom wall of the processing tank 2; multiple sets of fiber filter discs 6211 are provided on the outer surface of the first rotating shaft.

[0049] In this embodiment, the fiber filter disc 6211 is composed of a polyester fiber filter cloth and a circular frame, with the circular frame fixed on the first rotating shaft.

[0050] Preferably, a negative pressure suction backwashing mechanism is also provided at the bottom of the fiber disc filter zone 6, and the negative pressure suction backwashing mechanism is connected to the sludge thickening tank 3 through a pipeline.

[0051] In this embodiment, the negative pressure suction backwashing mechanism consists of a vacuum generator, a flushing pump, and a water collection pipe. The backwash water is discharged to the sludge thickening tank 3 through the pipeline.

[0052] Working principle: Wastewater first enters the pretreatment unit to intercept large particulate impurities. The wastewater then flows into the sludge thickening tank of the treatment tank, where coagulant and magnetic powder are added. The stirring mechanism is activated, causing suspended solids, colloidal substances, and other pollutants in the water to form flocs. After the magnetic coagulation reaction, the wastewater enters the magnetic separation sedimentation zone, where the flocs undergo solid-liquid separation. The separated water flows out from the top of the tank and enters the fiber disc filtration zone, while the sludge settles at the bottom and enters the electromagnetic separator for further separation. The separated magnetic powder is transported to the dosing mechanism for recycling, and the sludge enters the sludge thickening tank. The separated water then enters the fiber disc filtration zone, where the fiber disc mechanism is activated, causing the fiber filter discs to rotate at a uniform speed.

[0053] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A tunnel wastewater integrated zero-discharge treatment device, comprising a pretreatment unit for intercepting large particulate impurities in wastewater, a treatment unit for treating wastewater, and a sludge thickening tank for treating sludge; the outlet end of the pretreatment unit is connected to the inlet end of the treatment unit, and the sludge thickening tank is connected to the sludge outlet of the treatment unit, characterized in that, The processing unit includes a processing tank, which is independently equipped with a magnetic coagulation reaction zone, a magnetic separation sedimentation zone, and a fiber disc filtration zone from top to bottom; wherein, the magnetic coagulation reaction zone is connected to the pretreatment unit, and the sludge outlet of the fiber disc filtration zone is connected to the sludge thickening tank. A dosing mechanism is located at the top of the treatment tank and is connected to the magnetic coagulation reaction zone; An electromagnetic separator is provided at the bottom of the magnetic separation sedimentation zone. The electromagnetic outlet of the electromagnetic separator is connected to the dosing mechanism via a screw conveyor, and the sludge outlet of the electromagnetic separator is connected to the sludge thickening tank. A fiber turntable mechanism is disposed in the fiber turntable filtration area.

2. The integrated zero-discharge treatment device for tunnel sewage as described in claim 1, characterized in that, The magnetic coagulation reaction zone is also equipped with a stirring mechanism, which includes a first drive motor and a first stirring shaft. The first drive motor is located at the top of the processing tank and is fixedly installed on the processing tank; the first end of the first stirring shaft is drivenly connected to the drive end of the first drive motor; the second end of the first stirring shaft passes through the top wall of the processing tank and is located in the magnetic coagulation reaction zone, and the first stirring shaft is rotatably connected to the top wall of the processing tank; a stirring blade assembly is provided on the outer surface of the first stirring shaft.

3. The integrated zero-discharge treatment device for tunnel sewage as described in claim 2, characterized in that, The stirring blade assembly includes a paddle-type stirring blade assembly and a frame-type stirring blade assembly, which are arranged sequentially from top to bottom on the outer surface of the first stirring shaft.

4. The integrated zero-discharge treatment device for tunnel sewage as described in claim 1, characterized in that, The magnetic separation sedimentation zone includes a sedimentation chamber and a buffer chamber; the buffer chamber is located on one side of the sedimentation chamber, the top of the buffer chamber is connected to the magnetic coagulation reaction zone, and the bottom of the buffer chamber is connected to the sedimentation chamber; the top of the sedimentation chamber is connected to the fiber disc filtration zone through a pipeline. The electromagnetic separator is located at the bottom of the sedimentation chamber.

5. The integrated zero-discharge treatment device for tunnel sewage as described in claim 4, characterized in that, The sedimentation chamber includes an overflow weir area, an inclined plate area, and a conical sludge collection area connected sequentially from top to bottom; The electromagnetic separator is located at the bottom center of the conical sludge collection zone, and several inclined plates are evenly distributed in the inclined plate zone; the overflow weir zone is provided with an overflow weir, and one end of the overflow weir is provided with an outlet and is connected to the fiber disc filter zone.

6. The integrated zero-discharge treatment device for tunnel sewage as described in claim 4, characterized in that, Multiple guide vanes are inclinedly arranged inside the buffer cavity.

7. The integrated zero-discharge treatment device for tunnel sewage as described in claim 1, characterized in that, The fiber disc filtration zone is divided into a dispersion chamber and a filtration chamber by a partition plate; the dispersion chamber is located above the filtration chamber, and the partition plate is provided with multiple water outlet holes; the fiber disc mechanism is disposed on the filtration chamber.

8. The integrated zero-discharge treatment device for tunnel sewage as described in claim 7, characterized in that, The fiber turntable mechanism includes a second drive motor and a first rotating shaft; The second drive motor is located at the bottom of the processing tank and is fixedly installed on the processing tank; the first end of the first rotating shaft is drivenly connected to the drive end of the second drive motor; the second end of the first rotating shaft passes through the top wall of the processing tank and is located in the filter chamber; the first rotating shaft is rotatably connected to the bottom wall of the processing tank; multiple sets of fiber filter discs are provided on the outer surface of the first rotating shaft.

9. The integrated zero-discharge treatment device for tunnel sewage as described in claim 8, characterized in that, The bottom of the fiber disc filtration zone is also equipped with a negative pressure suction backwashing mechanism, which is connected to the sludge thickening tank through a pipeline.

Images