Sludge collection system for sewage treatment plant

Abstract

The utility model discloses a sludge collection system for a sewage treatment plant, which comprises a sludge concentration tank, a sludge sedimentation tank, a first sludge storage tank and a second sludge storage tank, and a sludge inlet of the sludge concentration tank is connected with a sludge outlet of a sludge production unit in the sewage treatment plant. A sludge outlet of the sludge concentration tank is connected with a sludge inlet of the sludge sedimentation tank through a first sludge conveying pipeline, an electric control valve and a first sludge pump are arranged on the first sludge conveying pipeline, and a sludge outlet of the sludge sedimentation tank is connected to an inlet of a three-way valve through a second sludge conveying pipeline; a second sludge pump is arranged on the second sludge conveying pipeline, and two outlets of the three-way valve are respectively communicated with the first sludge storage tank and the second sludge storage tank through a third sludge conveying pipeline. The treatment difficulty of the sludge in the sludge storage tank is effectively reduced, and the storage time is shortened, so that the sludge collection efficiency is improved, and the influence on normal operation of sewage treatment equipment due to excessive accumulation of the sludge is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and specifically designs a sludge collection system for a sewage treatment plant. Background Art

[0002] Sludge is generated during the hydrolysis, oxidation, clarification, and sedimentation processes of sewage treatment. Therefore, sludge treatment is a crucial component of sewage treatment. Currently, sewage treatment often requires the construction of sludge thickening tanks. Submersible sewage pumps are used to extract sludge from various sewage treatment equipment into sludge storage tanks for storage, thereby collecting the sludge for subsequent treatment.

[0003] However, in the prior art, the sludge is collected and directly transported to the sludge storage tank, which makes the sludge in the sludge storage tank difficult to handle and requires a long storage time. There may even be excessive sludge storage that affects the normal operation of the sewage treatment equipment. Utility Model Content

[0004] The utility model provides a sludge collection system for a sewage treatment plant, which can concentrate and carry out secondary sedimentation treatment on the sludge generated by each sewage treatment equipment and then transport it to a sludge storage tank for storage, thereby effectively overcoming the technical problems existing in the prior art.

[0005] A sludge collection system for a sewage treatment plant comprises a sludge thickening tank, a sludge sedimentation tank, a first sludge storage tank, and a second sludge storage tank. The sludge inlet of the sludge thickening tank is connected to the sludge outlet of a sludge-producing unit in the sewage treatment plant. The sludge outlet of the sludge thickening tank is connected to the sludge inlet of the sludge sedimentation tank via a first sludge conveying pipeline. An electric-controlled valve and a first sludge pump are provided on the first sludge conveying pipeline. The sludge outlet of the sludge sedimentation tank is connected to the inlet of a three-way valve via a second sludge conveying pipeline. A second sludge pump is provided on the second sludge conveying pipeline. The two outlets of the three-way valve are respectively connected to the first sludge storage tank and the second sludge storage tank via a third sludge conveying pipeline.

[0006] Furthermore, the sludge-producing units in the sewage treatment plant include a biochemical sludge tank and a physicochemical sludge tank. The sludge outlet of the biochemical sludge tank is connected to the sludge inlet of the sludge thickening tank through a fourth sludge conveying pipeline, and the sludge outlet of the physicochemical sludge tank is connected to the sludge inlet of the sludge thickening tank through a fifth sludge conveying pipeline. A third sludge pump is provided on the fourth sludge conveying pipeline, and a fourth sludge pump is provided on the fifth sludge conveying pipeline.

[0007] Furthermore, mud level meters are provided in both the first mud storage tank and the second mud storage tank.

[0008] Furthermore, the structures of the first mud storage tank and the second mud storage tank are consistent. The first mud storage tank includes a tank body, a stirring motor is fixedly installed at the center of the top of the tank body, a stirring mechanism is arranged in the tank body, the output shaft of the stirring motor is connected to the driving end of the stirring mechanism through a coupling, a mud inlet is opened at the top of the tank body, and a mud outlet is opened at the bottom of the tank body.

[0009] Furthermore, a sludge collecting hopper is formed at the bottom of the tank body, the size of the sludge collecting hopper feed port is consistent with the inner diameter of the tank body, and the discharge port of the sludge collecting hopper is connected to the sludge discharge port at the bottom of the tank body.

[0010] Furthermore, a mud discharge pipe is provided at the bottom of the pool body, the inlet of the mud discharge pipe is connected to the outlet of the sludge collecting bucket, and the mud outlet of the mud discharge pipe is connected to a mud discharge machine.

[0011] Furthermore, the mud discharger adopts a screw conveyor.

[0012] Furthermore, the stirring mechanism includes a stirring shaft, a first stirring paddle, a second stirring paddle and a third stirring paddle, the upper end of the stirring shaft is connected to the coupling, the first stirring paddle, the second stirring paddle and the third stirring paddle are connected to the stirring shaft in sequence from top to bottom, and the far ends of the first stirring paddle, the second stirring paddle and the third stirring paddle are connected by a reinforcing rod.

[0013] Furthermore, the third stirring paddle is arc-shaped, and the arc surface of the third stirring paddle is arranged downward.

[0014] Beneficial effects:

[0015] 1. The sludge generated by each sewage treatment equipment can be concentrated and subjected to secondary sedimentation treatment through the sludge thickening tank and sludge sedimentation tank, and then transported to the sludge storage tank for storage, thereby effectively reducing the difficulty of sludge treatment in the sludge storage tank, helping to shorten the storage time, thereby speeding up the efficiency of sludge collection and avoiding the normal operation of sewage treatment equipment affected by excessive sludge accumulation.

[0016] 2. The setting of the first sludge storage tank and the second sludge storage tank forms a main and standby sludge storage method, which can further speed up the efficiency of sludge collection.

[0017] 3. The mud level meters installed in the first and second sludge storage tanks can cooperate with the controller to realize the switching between the first and second sludge storage tanks, thereby realizing the automatic collection of sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a structural diagram of the first mud storage tank;

[0020] Figure 3 It is a structural diagram of the stirring mechanism. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0022] like Figure 1 As shown, a sludge collection system for a sewage treatment plant includes a sludge thickening tank 1, a sludge sedimentation tank 2, a first sludge storage tank 3, a second sludge storage tank 4 and a controller 19. The sludge inlet of the sludge thickening tank 1 is connected to the sludge outlet of the sludge producing unit in the sewage treatment plant. The sludge outlet of the sludge thickening tank 1 is connected to the sludge inlet of the sludge sedimentation tank 2 through a first sludge conveying pipe 11. An electric control valve 12 and a first sludge pump 13 are provided on the first sludge conveying pipe 11. The sludge outlet of the sludge sedimentation tank 2 is connected to the sludge outlet of the sludge thickening tank 1 through a second sludge conveying pipe 11. The pipeline 14 is connected to the inlet of the three-way valve 16. A second sludge pump 15 is provided on the second sludge conveying pipeline 14. The two outlets of the three-way valve 16 are respectively connected to the first sludge storage tank 3 and the second sludge storage tank 4 through the third sludge conveying pipeline 17. A mud level meter 18 is provided in the first sludge storage tank 3 and the second sludge storage tank 4. The mud level meter 18 is connected to the input end of the controller 19, and the output end group of the controller 19 is connected to the control end of the electric control valve 12, the first sludge pump 13, the second sludge pump 15 and the three-way valve 16.

[0023] In this example, the sludge-producing units in the sewage treatment plant include a biochemical sludge tank 9 and a physicochemical sludge tank 10. The sludge outlet of the biochemical sludge tank 9 is connected to the sludge inlet of the sludge thickening tank 1 through a fourth sludge conveying pipe 5, and the sludge outlet of the physicochemical sludge tank 10 is connected to the sludge inlet of the sludge thickening tank 1 through a fifth sludge conveying pipe 6. A third sludge pump 7 is provided on the fourth sludge conveying pipe 5, and a fourth sludge pump 8 is provided on the fifth sludge conveying pipe 6. The third sludge pump 7 and the fourth sludge pump 8 are both connected to the output end group of the controller 19.

[0024] The controller 19 controls the third sludge pump 7, the fourth sludge pump 8, the electric control valve 12, the first sludge pump 13, the second sludge pump 15 and the three-way valve 16 according to the mud level signal detected by the mud level meter 18, so that the system can automatically collect sludge.

[0025] In this example, in order to facilitate construction and reduce construction difficulty and construction cost, the structures of the first mud storage tank 3 and the second mud storage tank 4 are consistent, wherein the structure of the first mud storage tank 3 is shown in the attached Figure 2, including a pool body 31, a stirring motor 32 is fixedly installed at the center of the top of the pool body 31, a stirring mechanism 34 is arranged in the pool body 31, the output shaft of the stirring motor 32 is connected to the driving end of the stirring mechanism 34 through a coupling 33, a mud inlet 35 is provided at the top of the pool body 31, and a mud outlet is provided at the bottom of the pool body 31, a sludge collecting bucket 36 is formed at the bottom of the pool body 31, the size of the feed port of the sludge collecting bucket 36 is consistent with the inner diameter of the pool body 31, a mud discharge pipe 39 is provided at the bottom of the pool body 31, the inlet of the mud discharge pipe 39 is connected to the outlet of the sludge collecting bucket 36, and the mud outlet of the mud discharge pipe 39 is connected to a mud discharger 37.

[0026] The sludge input from the sludge sedimentation tank 2 is input into the tank body 31 through the mud inlet 35, and the stirring mechanism 34 is driven by the stirring motor 32 to rotate and stir the sludge to prevent the sludge from compacting. Then, the sludge flows out from the mud discharge pipe 39 to the mud discharger 37 as needed, and the collected sludge is transported to subsequent sludge treatment equipment through the mud discharger 37.

[0027] In this embodiment, the mud discharger 37 is a screw conveyor.

[0028] like Figure 3 As shown, the stirring mechanism 34 includes a stirring shaft 341, a first stirring paddle 342, a second stirring paddle 343 and a third stirring paddle 344. The upper end of the stirring shaft 341 is connected to the coupling 33, and the first stirring paddle 342, the second stirring paddle 343 and the third stirring paddle 344 are connected to the stirring shaft 341 in sequence from top to bottom. The distal ends of the first stirring paddle 342, the second stirring paddle 343 and the third stirring paddle 344 are connected by a reinforcing rod 345.

[0029] from Figure 3 It can also be seen that the third stirring paddle 344 is arc-shaped, and the arc surface of the third stirring paddle 344 is set downward. The arc-shaped third stirring paddle 344 can cooperate with the sludge collecting bucket 36 to fully stir the sludge at the bottom of the tank body 31 to ensure the stirring effect.

[0030] In this embodiment, an air pump 38 is also provided at the top of the pool body 31, a first gas supply channel 346 is opened at the center of the stirring shaft 341, a second gas supply channel 347 is opened at the center of the third stirring paddle 344, and a third gas supply channel 348 is opened at the center of the reinforcing rod 345. A plurality of air nozzles 349 are provided on the lower surface of the third stirring paddle 344 and the outer surface of the reinforcing rod 345, and the air nozzles 349 are connected to the second gas supply channel 347 or the third gas supply channel 348.

[0031] Through the above structure, air can be pumped into the first air delivery channel 346, the second air delivery channel 347, and the third air delivery channel 348 through the air pump 38, and then high-pressure gas is ejected by the air nozzle 349. This not only forms air stirring, thereby cooperating with the stirring of the first stirring paddle 342, the second stirring paddle 343 and the third stirring paddle 344 to further improve the stirring effect, but also the sludge on the sides of the reinforcing rod 345 and the third stirring paddle 344 can be blown away by the ejected high-pressure gas to reduce the stirring resistance and the power consumption of the stirring motor 32, thereby extending the service life of the stirring mechanism 34.

[0032] Working principle:

[0033] When collecting sludge, a control command is input, and the controller 19 controls the electric control valve 12, the first sludge pump 13, the second sludge pump 15, the third sludge pump 7, and the fourth sludge pump 8 to open, and controls the three-way valve 16 to connect the sludge sedimentation tank 2 and the first sludge storage tank 3, so that the sludge generated by the biochemical sludge tank 9 and the physicochemical sludge tank 10 is pumped into the sludge thickening tank 1 for concentration treatment, and the sludge sedimentation tank 2 for secondary sedimentation treatment, and then input into the first sludge storage tank 3 for storage;

[0034] When the mud level meter 18 in the first sludge storage tank 3 detects that the mud level value reaches the upper limit of the mud storage tank 3, the controller 19 controls the three-way valve 16 to connect the sludge sedimentation tank 2 with the second sludge storage tank 4, and the sludge after the sludge concentration treatment in the sludge concentration tank 1 and the secondary sedimentation treatment in the sludge sedimentation tank 2 is input into the first sludge storage tank 3 for storage;

[0035] When the mud level meter 18 in the second sludge storage tank 4 detects that the mud level value reaches the upper limit of the mud storage tank 4, the controller 19 controls the three-way valve 16 to connect the sludge sedimentation tank 2 and the first sludge storage tank 3, so that the sludge after the sludge concentration treatment in the sludge concentration tank 1 and the secondary sedimentation treatment in the sludge sedimentation tank 2 are input into the first sludge storage tank 3 for storage;

[0036] This cycle repeats itself.

[0037] In summary, the sludge generated by sewage treatment equipment such as the biochemical sludge tank 9 and the physicochemical sludge tank 10 can be concentrated and subjected to secondary sedimentation treatment through the sludge thickening tank 1 and the sludge sedimentation tank 2, and then transported to the sludge storage tank for storage, thereby effectively reducing the difficulty of treating the sludge in the sludge storage tank, helping to shorten the storage time, thereby speeding up the efficiency of sludge collection, and avoiding the impact of excessive sludge accumulation on the normal operation of the sewage treatment equipment; at the same time, improving the setting of the first sludge storage tank 3 and the second sludge storage tank 4 to form a main and standby sludge storage method, which can further speed up the efficiency of sludge collection. In addition, through the cooperation of the mud level meter 18 and the controller 19 set in the first sludge storage tank 3 and the second sludge storage tank 4, automatic switching between the first sludge storage tank 3 and the second sludge storage tank 4 is realized, and then the automatic collection of sludge is realized in cooperation with other electronic control periods.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A sludge collection system for a sewage treatment plant, characterized in that: The invention comprises a sludge thickening tank (1), a sludge sedimentation tank (2), a first sludge storage tank (3), and a second sludge storage tank (4); the sludge inlet of the sludge thickening tank (1) is connected to the sludge outlet of a sludge producing unit in a sewage treatment plant; the sludge outlet of the sludge thickening tank (1) is connected to the sludge inlet of the sludge sedimentation tank (2) through a first sludge conveying pipe (11); an electric control valve (12) and a first sludge pump (13) are provided on the first sludge conveying pipe (11); the sludge outlet of the sludge sedimentation tank (2) is connected to the inlet of a three-way valve (16) through a second sludge conveying pipe (14); a second sludge pump (15) is provided on the second sludge conveying pipe (14); and the two outlets of the three-way valve (16) are respectively connected to the first sludge storage tank (3) and the second sludge storage tank (4) through a third sludge conveying pipe (17).

2. The sewage treatment plant sludge collection system according to claim 1, characterized in that: The sludge production unit in the sewage treatment plant includes a biochemical sludge tank (9) and a physicochemical sludge tank (10). The sludge outlet of the biochemical sludge tank (9) is connected to the sludge inlet of the sludge thickening tank (1) through a fourth sludge conveying pipeline (5). The sludge outlet of the physicochemical sludge tank (10) is connected to the sludge inlet of the sludge thickening tank (1) through a fifth sludge conveying pipeline (6). A third sludge pump (7) is provided on the fourth sludge conveying pipeline (5), and a fourth sludge pump (8) is provided on the fifth sludge conveying pipeline (6).

3. The sludge collection system for a sewage treatment plant according to claim 1, characterized in that: Mud level meters (18) are provided in both the first mud storage tank (3) and the second mud storage tank (4).

4. The sludge collection system for a sewage treatment plant according to any one of claims 1 to 3, characterized in that: The first mud storage tank (3) and the second mud storage tank (4) have the same structure. The first mud storage tank (3) comprises a tank body (31). A stirring motor (32) is fixedly installed at the center of the top of the tank body (31). A stirring mechanism (34) is arranged in the tank body (31). The output shaft of the stirring motor (32) is connected to the driving end of the stirring mechanism (34) through a coupling (33). A mud inlet (35) is provided at the top of the tank body (31), and a mud outlet is provided at the bottom of the tank body (31).

5. The sludge collection system for a sewage treatment plant according to claim 4, characterized in that: A sludge collecting hopper (36) is formed at the bottom of the tank body (31). The size of the feed port of the sludge collecting hopper (36) is consistent with the inner diameter of the tank body (31). The discharge port of the sludge collecting hopper (36) is connected to the sludge discharge port.

6. The sludge collection system for a sewage treatment plant according to claim 5, characterized in that: A mud discharge pipe (39) is provided at the bottom of the tank body (31), the inlet of the mud discharge pipe (39) is connected to the outlet of the sludge collecting bucket (36), and the mud outlet of the mud discharge pipe (39) is connected to a mud discharge machine (37).

7. The sludge collection system for a sewage treatment plant according to claim 6, characterized in that: The mud discharger (37) is a screw conveyor.

8. The sludge collection system for a sewage treatment plant according to claim 4, characterized in that: The stirring mechanism (34) includes a stirring shaft (341), a first stirring paddle (342), a second stirring paddle (343) and a third stirring paddle (344). The upper end of the stirring shaft (341) is connected to the coupling (33). The first stirring paddle (342), the second stirring paddle (343) and the third stirring paddle (344) are sequentially connected to the stirring shaft (341) from top to bottom. The distal ends of the first stirring paddle (342), the second stirring paddle (343) and the third stirring paddle (344) are connected via a reinforcing rod (345).

9. The sludge collection system for a sewage treatment plant according to claim 5, characterized in that: The third stirring paddle (344) is arc-shaped, and the arc surface of the third stirring paddle (344) is arranged downward.

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