Sequencing batch sludge precipitation separation device

Abstract

The utility model discloses a sequencing batch sludge precipitation separation device which comprises a wastewater discharge pipe with a feeding end connected with a water outlet of a sludge dewatering machine, the discharge end of the wastewater discharge pipe is connected with two sludge precipitation mechanisms which are arranged in parallel, and the discharge end of the wastewater discharge pipe is lower than the feeding end to form self-flow fit. The two sludge precipitation mechanisms are alternately communicated and matched with the wastewater discharge pipe, the discharge ends of the two sludge precipitation mechanisms are both connected to the same sludge discharge pipe in parallel, the discharge ends of the two sludge precipitation mechanisms are alternately communicated and matched with the sludge discharge pipe, and the water outlet ends of the two sludge precipitation mechanisms are both connected to the same blow-down pipe in parallel. The water outlet ends of the two sludge precipitation mechanisms are alternately communicated and matched with the blow-down pipe, so that the sludge is pretreated, the subsequent sewage treatment pressure is reduced, the blockage of a sewage pipeline is relieved, continuous treatment is realized, and the treatment energy consumption is low.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sequencing batch type sludge sedimentation and separation device. Background Art

[0002] The sludge dewatering machines installed in the sewage treatment plant, such as centrifugal dewatering machines and screw dewatering machines, need to be flushed inside the equipment when switching to operation and shutdown. The flushing wastewater contains a large amount of sludge, and the solid content can be as high as 6000~8000mg / L. The sludge in this part of the flushing wastewater will be deposited in the factory sewage pipes of the dewatering workshop, causing pipe blockage. At the same time, the lost sludge also reduces the sludge recovery rate of the dewatering machine, causing part of the sludge to flow back to the sewage treatment facilities, which may have an adverse effect on the operation of the sewage treatment facilities. Utility Model Content

[0003] The utility model provides a sequencing batch sludge sedimentation and separation device, which precipitates and separates the sludge in the flushing wastewater of a sludge dewatering machine by static sedimentation, discharges the precipitated and concentrated sludge into the sludge inlet pool at the front end of the sludge dewatering machine, and discharges the precipitated supernatant into the factory sewage network, thereby achieving the purpose of purifying the flushing wastewater, alleviating the siltation of the factory sewage pipe, and reducing the impact on the water quality of the sewage treatment facilities.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sequential batch sludge sedimentation and separation device, including a wastewater discharge pipe whose feed end is connected to the water outlet of a sludge dewatering machine, the discharge end of the wastewater discharge pipe is connected to two sludge sedimentation mechanisms arranged in parallel, and the discharge end of the wastewater discharge pipe is lower than the feed end to form a gravity flow coordination, the two sludge sedimentation mechanisms and the wastewater discharge pipe are alternately connected and coordinated, the discharge ends of the two sludge sedimentation mechanisms are both connected in parallel to the same sludge discharge pipe, and the discharge ends of the two sludge sedimentation mechanisms are alternately connected and coordinated with the sludge discharge pipe, the water outlet ends of the two sludge sedimentation mechanisms are both connected in parallel to the same drain pipe, and the water outlet ends of the two sludge sedimentation mechanisms are alternately connected and coordinated with the drain pipe.

[0005] Preferably, the sludge settling mechanisms all include a liquid storage tank, a feed end is provided on one side of the bottom of the liquid storage tank, and the feed end of the liquid storage tank is connected to the discharge end of the wastewater discharge pipe through a feed pipe, and the feed pipes of the two sludge settling mechanisms are connected in parallel with the wastewater discharge pipes;

[0006] A perforated mud discharge pipe is provided at the bottom of each liquid storage tank. The output end of the perforated mud discharge pipe passes through the liquid storage tank and is connected to the mud discharge pipe through the mud discharge pipe. The mud discharge pipes and mud discharge pipes of the two mud sedimentation mechanisms are connected in parallel.

[0007] A liquid outlet is provided on the other side of the bottom of the liquid storage tank, and the liquid outlet of the liquid storage tank is connected with the venting pipe through a clear liquid outlet pipe, and the clear liquid outlet pipes and venting pipes of the two sludge sedimentation mechanisms are matched in parallel.

[0008] As a more preferred embodiment, a liquid level gauge is provided at the top of each of the liquid storage tanks, and a sensing end of the liquid level gauge extends into the corresponding liquid storage tank to form a sensing match with the liquid level in the tank;

[0009] Each feed pipe is provided with a feed valve, and the feed valves of the two sludge sedimentation mechanisms are linked together through an external control mechanism, and the feed valves are linked together with the liquid level gauges on the corresponding liquid storage tanks;

[0010] Each sludge discharge pipe is equipped with a sludge discharge valve, which forms a delayed linkage with the liquid level gauge on the corresponding liquid storage tank through an external control mechanism;

[0011] Each clear liquid discharge pipe is provided with a clear liquid discharge valve, which is linked with a liquid level gauge on a corresponding liquid storage tank through an external control mechanism.

[0012] Furthermore, the top of the liquid storage tank is provided with a maintenance manhole, and an openable and closable cover is provided at the maintenance manhole.

[0013] Furthermore, the external control mechanism includes a control box, and a controller with a delay module is arranged in the control box.

[0014] Furthermore, an overflow pipe is provided between the feed end of the wastewater discharge pipe and the vent pipe, and the wastewater discharge pipe is connected with the vent pipe through the overflow pipe to form an overflow connection.

[0015] Specifically, a main valve is provided at the discharge end of the wastewater discharge pipe.

[0016] Furthermore, the discharge end of the vent pipe is connected to a sewage inspection well.

[0017] Furthermore, the discharge end of the mud discharge pipe is connected to the mud inlet tank, and the mud inlet tank and the sludge dewatering machine form a feeding coordination.

[0018] Beneficial effects of the utility model:

[0019] The utility model uses a sludge sedimentation mechanism to preliminarily separate sludge from sewage and recycles most of the sludge, thereby ensuring the sludge recovery rate of the dehydrator and achieving the purpose of purifying flushing wastewater, alleviating siltation in factory sewage pipes, and reducing the impact on the water quality of sewage treatment facilities;

[0020] Two parallel sludge sedimentation mechanisms are used to operate alternately during the process to ensure continuous operation. The sludge sedimentation mechanism uses gravity potential energy for feeding and discharging, and there is no large traction mechanism. The sedimentation is static sedimentation, which saves energy and reduces emissions during the treatment process.

[0021] The switching of each stage is controlled by the linkage formed by the liquid level meter, various control valves and external control mechanisms, which operates intelligently and improves the efficiency of sludge pretreatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structural system of the utility model;

[0023] Figure 2 It is a plan view of the utility model;

[0024] Figure 3 It is a schematic diagram of the timeline of the use process of the utility model;

[0025] In the figure: 1. Wastewater discharge pipe; 2. Main valve;

[0026] 3. Sludge sedimentation mechanism; 301. Feed pipe; 302. Feed valve; 303. Liquid storage tank; 3031. Inspection manhole; 3032. Cover plate; 304. Liquid level gauge; 305. Perforated sludge discharge pipe; 306. Sludge discharge pipe; 307. Clear liquid discharge pipe; 308. Sludge discharge valve; 309. Clear liquid discharge valve;

[0027] 4. Mud discharge pipe; 5. Vent pipe; 6. External control mechanism; 7. Overflow pipe. DETAILED DESCRIPTION

[0028] As follows, embodiments are further described with reference to the accompanying drawings.

[0029] like Figure 1~Figure 2 As shown, as a preferred embodiment 1, a sequencing batch sludge sedimentation and separation device includes a wastewater discharge pipe 1 whose feed end is connected to the water outlet of a sludge dewatering machine, the discharge end of the wastewater discharge pipe 1 is connected to two sludge sedimentation mechanisms 3 arranged in parallel, and the discharge end of the wastewater discharge pipe 1 is lower than the feed end to form a gravity flow coordination, the two sludge sedimentation mechanisms 3 are alternately connected and coordinated with the wastewater discharge pipe 1, the discharge ends of the two sludge sedimentation mechanisms 3 are both connected in parallel to the same sludge discharge pipe 4, and the discharge ends of the two sludge sedimentation mechanisms 3 are alternately connected and coordinated with the sludge discharge pipe 4, the water outlet ends of the two sludge sedimentation mechanisms 3 are both connected in parallel to the same vent pipe 5, and the water outlet ends of the two sludge sedimentation mechanisms 3 are alternately connected and coordinated with the vent pipe 5.

[0030] Embodiment 1 provides a sequential batch sludge sedimentation and separation device, comprising two sludge sedimentation mechanisms 3 connected in parallel with a wastewater discharge pipe 1, and the two sludge sedimentation mechanisms 3 are alternately connected and matched with the wastewater discharge pipe 1. When one sludge sedimentation mechanism 3 is connected to the wastewater discharge pipe 1 to inlet water, the other sludge sedimentation mechanism 3 is not connected to the wastewater discharge pipe 1 to inlet water. At this time, the wastewater discharge pipe 1 that is not inletting water is precipitated, sludge is discharged, and emptied. When the emptying is completed, the sludge sedimentation mechanism 3 that has inlet water has just completed the water inlet. At this time, the connection is switched, and the wastewater discharge pipe 1 that has finished emptying is disconnected. The sludge sedimentation mechanism 3 starts to take in water, and the sludge sedimentation mechanism 3 that has completed the water intake performs sedimentation, sludge discharge and emptying. The two sludge sedimentation mechanisms 3 operate alternately to ensure the continuous treatment of the sludge dewatering machine flushing wastewater. The process does not involve large-scale traction devices, and the feeding relies on gravity potential energy. The sludge is settled by standing, and the precipitated sludge is taken out together with the water flow, thereby ensuring the effect of sludge pretreatment, saving energy consumed in the pretreatment process, and achieving the purpose of purifying flushing wastewater, alleviating siltation in factory sewage pipes, and reducing the impact on the water quality of sewage treatment facilities.

[0031] As a preferred embodiment 2, the sludge settling mechanism 3 includes a liquid storage tank 303, a feed end is provided on one side of the bottom of the liquid storage tank 303, and the feed end of the liquid storage tank 303 is connected to the discharge end of the wastewater discharge pipe 1 through a feed pipe 301, and the feed pipes 301 of the two sludge settling mechanisms 3 are connected in parallel with the wastewater discharge pipe 1;

[0032] The bottom of the liquid storage tank 303 is provided with a perforated mud discharge pipe 305. The output end of the perforated mud discharge pipe 305 passes through the liquid storage tank 303 and is connected to the mud discharge pipe 4 through the mud discharge pipe 306. The mud discharge pipes 306 of the two mud sedimentation mechanisms 3 are connected in parallel with the mud discharge pipe 4.

[0033] A liquid outlet is provided at the other side of the bottom of the liquid storage tank 303 , and the liquid outlet of the liquid storage tank 303 is connected to the vent pipe 5 through a clear liquid outlet pipe 307 , and the clear liquid outlet pipes 307 of the two sludge sedimentation mechanisms 3 are in parallel with the vent pipe 5 .

[0034] Embodiment 2 provides the basic structure of the sludge settling mechanism 3. The flushing wastewater of the sludge dewatering machine enters the liquid storage tank 303 from the feed pipe 301 through the gravitational potential energy, and fills the liquid storage tank 303 from the bottom to the top. When a certain amount of storage is accumulated, the connection is switched, the liquid storage tank 303 stops feeding and starts to settle. The liquid storage tank 303 of another sludge settling mechanism 3 starts to feed. After settling for a period of time, the perforated mud discharge pipe 305 at the bottom of the liquid storage tank 303 is connected to the mud discharge pipe 4 through the mud discharge pipe 306. The sewage is discharged from the perforated mud discharge pipe 305 due to the gravitational potential energy. In the process, the water flow drives the bottom mud into the perforated mud discharge pipe 305 together. Thereby, the bottom sludge is discharged, and the sludge passes through the perforated sludge discharge pipe 305 and the sludge discharge pipe 306 in turn under the action of water flow and enters the sludge discharge pipe 4. After a certain amount of bottom sludge is discharged, the connection between the sludge discharge pipe 306 and the sludge discharge pipe 4 is stopped, and at the same time, the liquid storage tank 303 is connected to the emptying pipe 5 through the clear liquid discharge pipe 307, and the upper sewage and residual sludge are discharged for treatment. After the emptying is completed, the feeding of the liquid storage tank 303 of the other sludge sedimentation mechanism 3 is stopped, and the feeding is switched to the emptied liquid storage tank 303. The cycle is repeated and operated alternately until the flushing wastewater treatment is completed, thereby reducing the subsequent sludge treatment volume and alleviating pipeline blockage.

[0035] As a preferred embodiment 3, a liquid level gauge 304 is provided at the top of each of the liquid storage tanks 303, and the sensing end of the liquid level gauge 304 extends into the corresponding liquid storage tank 303 to form a sensing match with the liquid level in the tank;

[0036] Each feed pipe 301 is provided with a feed valve 302, and the feed valves 302 of the two sludge settling mechanisms 3 are linked together through an external control mechanism 6, and the feed valves 302 are linked together with the liquid level gauge 304 on the corresponding liquid storage tank 303;

[0037] Each sludge discharge pipe 306 is provided with a sludge discharge valve 308, and the sludge discharge valve 308 forms a delayed linkage with the liquid level meter 304 on the corresponding liquid storage tank 303 through the external control mechanism 6;

[0038] Each clear liquid discharge pipe 307 is provided with a clear liquid discharge valve 309 , and the clear liquid discharge valve 309 is linked with the liquid level meter 304 on the corresponding liquid storage tank 303 through the external control mechanism 6 .

[0039] Embodiment 3 provides a further structure for facilitating the operation of the control process on the basis of the basic structure of Embodiment 2. The feeding of the liquid storage tank 303 is alternately linked through the corresponding feeding valve 302, the liquid level meter 304 and the external control mechanism 6. When the liquid level meter 304 of the liquid storage tank 303 being fed detects that the feeding liquid level reaches the specified value, the corresponding feeding valve 302 is closed, and the feeding valve 302 of another liquid storage tank 303 is opened for feeding, and so on, the alternating operation is completed, and the alternating connection and alternating feeding of the liquid storage tank 303 are completed, so as to ensure the continuous treatment of sewage;

[0040] The sedimentation is operated by the delayed start of the sludge discharge valve 308. When the corresponding feed valve 302 is closed, a signal is sent to the external control mechanism 6, and the sludge discharge valve 308 is delayed by the external control mechanism 6. During the delay period, the sludge in the corresponding liquid storage tank 303 is statically precipitated. When the delayed time period is reached, the external control mechanism 6 starts the corresponding sludge discharge valve 308, so that the perforated sludge discharge pipe 305 at the bottom of the liquid storage tank 303 is connected with the sludge discharge pipe 306, so that the sewage generates water flow through gravity, and the water flow drives the bottom sludge to pass through the perforated sludge discharge pipe 305 and the sludge discharge pipe 306 in turn into the sludge discharge pipe 4, and enters the sludge discharge stage;

[0041] When the sludge discharge stage reaches a certain extent, that is, when the liquid level meter 304 detects that the sewage has dropped to a specified liquid level, the sludge discharge valve 308 is closed through the external control mechanism 6, and the corresponding clear liquid discharge valve 309 is opened, connecting the clear liquid discharge pipe 307 with the drain pipe 5, so that the residual sewage and sludge in the liquid storage tank 303 are discharged through the drain pipe 6, and the discharge stage begins.

[0042] Preferably, the maximum liquid level of the liquid storage tank 303 is set lower than the top of the liquid storage tank 303 , and the maximum liquid level is lower than the feed end of the wastewater discharge pipe 1 .

[0043] As a preferred embodiment 4, the liquid storage tank 303 can be a finished liquid storage tank for sedimentation, which is cylindrical, 3m in diameter and 4.2m in height. The tank body is pre-made with a manhole, a liquid level gauge installation hole, and a pipe flange interface in the factory. It contains a liquid level gauge and a perforated mud discharge pipe. According to hydraulic calculations, it can process flushing wastewater with a flow rate of less than 100m3 / h;

[0044] The feed valve 302 can be a hand-operated and electric dual-purpose knife gate valve, DN300, PN1.0MPa, N=0.75kW, outdoor type;

[0045] The clear liquid discharge valve 309 can be a hand-operated and electric dual-purpose knife gate valve, DN300, PN1.0MPa, N=0.75kW, outdoor type;

[0046] The sludge discharge valve 308 can be a hand-operated and electric dual-purpose knife gate valve, DN250, PN1.0MPa, N=0.75kW, outdoor type.

[0047] As a preferred embodiment 5, the top of the liquid storage tank 303 is provided with a maintenance manhole 3031, and the maintenance manhole 3031 is provided with an openable cover plate 3032, which is convenient for maintenance and clearing.

[0048] As a preferred embodiment 6, the external control mechanism 6 includes a control box, and a controller with a delay module is provided in the control box. The controller is used to realize linkage coordination and delayed linkage coordination, which is convenient for automatic control switching process, and a PLC controller with a delay module can be selected.

[0049] As a preferred embodiment 7, an overflow pipe 7 is provided between the feed end of the wastewater discharge pipe 1 and the vent pipe 5, and the wastewater discharge pipe 1 forms an overflow connection with the vent pipe 5 through the overflow pipe 7.

[0050] As a preferred embodiment 8, a main valve 2 is provided at the discharge end of the wastewater discharge pipe 1.

[0051] Embodiment 7 and embodiment 8 provide an emergency connection method. Under normal circumstances, the main feed direction is controlled by the main valve 2. When the main valve 2 is connected, the flushing sewage is transported toward the two sludge sedimentation mechanisms 3 by gravity. When the pipeline and mechanism in this direction are blocked or the treatment needs to be suspended, the main valve 2 is closed, and the flushing wastewater enters the vent pipe 5 directly through the overflow pipe 7 and enters the sewage treatment mechanism. At this time, the normal treatment of the flushing sewage is guaranteed, but the sludge treatment capacity of the sewage treatment mechanism will increase.

[0052] As a preferred embodiment 9, the discharge end of the vent pipe 5 is connected to the sewage inspection well. It is used to receive sewage into the sewage treatment mechanism for sewage treatment, and the sludge sedimentation mechanism 3 is used to pre-treat the sludge to reduce the sludge treatment volume of the sewage treatment mechanism.

[0053] As a preferred embodiment 10, the discharge end of the sludge discharge pipe 4 is connected to the sludge inlet tank, and the sludge inlet tank forms a feeding match with the sludge dewatering machine. The sludge and sewage collected from the sludge sedimentation mechanism 3 are collected through the sludge inlet tank, and the sludge and sewage in the sludge inlet tank are passed into the sludge dewatering machine to form a circulating feeding match, and the sewage and sludge are separated again through the sludge dewatering machine to ensure the treatment effect.

[0054] like Figure 3As shown, as a preferred embodiment 11, each sludge sedimentation mechanism 3 includes four steps that are performed sequentially and cyclically, namely, a water intake stage, a sedimentation stage, a sludge discharge stage and an emptying stage, and the four steps of the two sludge sedimentation mechanisms 3 are performed alternately. When one sludge sedimentation mechanism 3 is in the water intake stage, the other sludge sedimentation mechanism 3 is performing the sedimentation stage, the sludge discharge stage and the emptying stage sequentially, and the end time of the last stage of the two sludge sedimentation mechanisms 3 is synchronized and alternated. At this time, the sludge sedimentation mechanism 3 that has ended the previous water intake stage performs the sedimentation stage, the sludge discharge stage and the emptying stage sequentially, and the other sludge sedimentation mechanism 3 that has ended the previous emptying stage enters the water intake stage, and this process is repeated until the sewage treatment is completed.

[0055] The working principle of this utility model:

[0056] The utility model provides a sequential batch type sludge sedimentation and separation device, comprising two sludge sedimentation mechanisms 3 connected in parallel with a wastewater discharge pipe 1, and the two sludge sedimentation mechanisms 3 are alternately connected and matched with the wastewater discharge pipe 1. When one sludge sedimentation mechanism 3 is connected to the wastewater discharge pipe 1 to inlet water, the other sludge sedimentation mechanism 3 is not connected to the wastewater discharge pipe 1 to inlet water. At this time, the wastewater discharge pipe 1 without water inflow performs sedimentation, sludge discharge and emptying. When the emptying is completed, the sludge sedimentation mechanism 3 with water inflow has just completed the water inflow. At this time, the connection is switched, and the wastewater discharge pipe 1 that has finished emptying is disconnected. The sludge sedimentation mechanism 3 starts to take in water, and the sludge sedimentation mechanism 3 that has completed the water intake performs sedimentation, sludge discharge and emptying. The two sludge sedimentation mechanisms 3 operate alternately to ensure the continuous treatment of the sludge dewatering machine flushing wastewater. The process does not involve large-scale traction devices, and the feeding relies on gravity potential energy. The sludge is settled by standing, and the precipitated sludge is taken out together with the water flow, thereby ensuring the effect of sludge pretreatment, saving energy consumed in the pretreatment process, and achieving the purpose of purifying flushing wastewater, alleviating siltation in factory sewage pipes, and reducing the impact on the water quality of sewage treatment facilities.

Claims

1. A sequencing batch sludge sedimentation and separation device, comprising a wastewater discharge pipe (1) whose feed end is connected to a water outlet of a sludge dewatering machine, characterized in that: The discharge end of the wastewater discharge pipe (1) is connected to two sludge settling mechanisms (3) arranged in parallel, and the discharge end of the wastewater discharge pipe (1) is lower than the feed end to form a gravity flow coordination, the two sludge settling mechanisms (3) and the wastewater discharge pipe (1) are alternately connected and coordinated, the discharge ends of the two sludge settling mechanisms (3) are both connected in parallel to the same sludge discharge pipe (4), and the discharge ends of the two sludge settling mechanisms (3) are alternately connected and coordinated with the sludge discharge pipe (4), the water outlet ends of the two sludge settling mechanisms (3) are both connected in parallel to the same vent pipe (5), and the water outlet ends of the two sludge settling mechanisms (3) are alternately connected and coordinated with the vent pipe (5).

2. A sequencing batch sludge sedimentation and separation device according to claim 1, characterized in that: The sludge settling mechanisms (3) all comprise a liquid storage tank (303), a feed end being provided on one side of the bottom of the liquid storage tank (303), and the feed end of the liquid storage tank (303) is connected to the discharge end of the wastewater discharge pipe (1) via a feed pipe (301), and the feed pipes (301) of the two sludge settling mechanisms (3) are connected in parallel with the wastewater discharge pipe (1); A perforated mud discharge pipe (305) is provided at the bottom of each liquid storage tank (303). The output end of the perforated mud discharge pipe (305) passes through the liquid storage tank (303) and is connected to the mud discharge pipe (4) through the mud discharge pipe (306). The mud discharge pipes (306) and the mud discharge pipes (4) of the two mud sedimentation mechanisms (3) are connected in parallel. A liquid outlet is provided at the other side of the bottom of the liquid storage tank (303), and the liquid outlet of the liquid storage tank (303) is connected to the drain pipe (5) via a clear liquid outlet pipe (307). The clear liquid outlet pipes (307) and the drain pipe (5) of the two sludge sedimentation mechanisms (3) are connected in parallel.

3. A sequencing batch sludge sedimentation and separation device according to claim 2, characterized in that: A liquid level meter (304) is provided at the top of each of the liquid storage tanks (303), and a sensing end of the liquid level meter (304) extends into the corresponding liquid storage tank (303) to form a sensing match with the liquid level in the tank; Each feed pipe (301) is provided with a feed valve (302), and the feed valves (302) of the two sludge settling mechanisms (3) are linked together through an external control mechanism (6), and the feed valves (302) and the liquid level gauges (304) on the corresponding liquid storage tanks (303) are linked together; Each sludge discharge pipe (306) is provided with a sludge discharge valve (308), and the sludge discharge valve (308) forms a delayed linkage with the liquid level meter (304) on the corresponding liquid storage tank (303) through an external control mechanism (6); Each clear liquid discharge pipe (307) is provided with a clear liquid discharge valve (309), and the clear liquid discharge valve (309) is linked with the liquid level meter (304) on the corresponding liquid storage tank (303) through an external control mechanism (6).

4. A sequencing batch sludge sedimentation and separation device according to claim 3, characterized in that: The top of each of the liquid storage tanks (303) is provided with a maintenance manhole (3031), and an openable and closable cover plate (3032) is provided at the maintenance manhole (3031).

5. A sequencing batch sludge sedimentation and separation device according to claim 3, characterized in that: The external control mechanism (6) comprises a control box, in which a controller with a delay module is arranged.

6. A sequencing batch sludge sedimentation and separation device according to any one of claims 1 to 5, characterized in that: An overflow pipe (7) is provided between the feed end of the wastewater discharge pipe (1) and the vent pipe (5), and the wastewater discharge pipe (1) is connected to the vent pipe (5) through the overflow pipe (7) to form an overflow connection.

7. A sequencing batch sludge sedimentation and separation device according to claim 6, characterized in that: A main valve (2) is provided at the discharge end of the wastewater discharge pipe (1).

8. A sequencing batch sludge sedimentation and separation device according to any one of claims 1 to 5, characterized in that: The discharge end of the vent pipe (5) is connected to a sewage inspection well.

9. A sequencing batch sludge sedimentation and separation device according to any one of claims 1 to 5, characterized in that: The discharge end of the mud discharge pipe (4) is connected to the mud inlet tank, and the mud inlet tank and the sludge dewatering machine form a feeding coordination.

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