Small-volume central treatment device for secondary sedimentation tank of sewage treatment plant

Abstract

The utility model discloses a small-volume sewage treatment plant secondary sedimentation tank central treatment device which comprises a base, a central stand column made of a steel central cylinder is installed in the middle of the upper end of the base, and an embedded steel plate is installed at the joint of the bottom end of the central stand column and the base. A column foot reinforcing steel plate is installed at the connecting position of the lower portion of the outer wall of the center stand column and the embedded steel plate, the upper side in the center stand column is connected with a sludge discharging pipe through a sludge discharging pipe reinforcing steel plate, and a bracket platform is further installed at the top end of the center stand column. According to the utility model, the defect that the cast-in-place concrete central cylinder template is difficult to mount and dismount in the civil construction of the secondary sedimentation tank is overcome, and meanwhile, the problem that the dredge pipe is difficult to dredge after being blocked in the use process of a sewage treatment plant is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water inlet, water outlet and mud discharge system of a single small-volume secondary sedimentation tank during the construction of a sewage treatment plant, and specifically relates to a central treatment device for a secondary sedimentation tank of a small-volume sewage treatment plant. Background Art

[0002] In small sewage treatment plants, in order to discharge the sludge in the sewage after biological treatment, it is often necessary to use a secondary sedimentation tank to achieve the sedimentation of the sludge in the sewage after biological treatment.

[0003] At present, the secondary sedimentation tank process of small-scale sewage treatment plants generally adopts the mode of intermediate water inlet and sludge discharge and peripheral drainage; the central tube of the secondary sedimentation tank is a cast-in-place concrete structure with an inner thickness of 400-600mm, and a 200-300mm sludge return pipe is installed in the tube. The construction space is small, and installation and removal are relatively difficult. During the operation of the sewage treatment plant, if the pre-buried water inlet pipe and sludge pipe are damaged, the cast-in-place concrete must be removed and the pipe must be repaired before the central cast-in-place concrete is re-made during maintenance. During this process, the sewage treatment plant needs to stop water for a long time, which brings greater sewage treatment pressure and environmental protection pressure to the sewage treatment plant. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is to provide a small-scale sewage treatment plant secondary sedimentation tank central treatment device based on the current status of the existing technology, which changes the central cylinder of the existing full-bridge peripheral transmission scraper from a concrete cast-in-place structure + pre-buried pipe mud discharge to a steel structure central water inlet and mud discharge pipe prefabricated and assembled steel structure.

[0006] (II) Technical solution

[0007] The utility model is achieved through the following technical scheme: the utility model proposes a central treatment device for the secondary sedimentation tank of a small-scale sewage treatment plant, including a base, a central column made of a steel central tube is installed in the middle of the upper end of the base, an embedded steel plate is installed at the connection between the bottom end of the central column and the base, a column foot reinforcement steel plate is installed at the connection between the lower part of the outer wall of the central column and the embedded steel plate, the upper inner side of the central column is connected to a mud discharge pipe through a mud discharge pipe reinforcement steel plate, and a bracket platform is also installed at the top of the central column.

[0008] Furthermore, the top of the bracket platform is connected to a mud suction main pipe through a mud suction pipe connector, the mud suction port of the mud suction main pipe is connected to a mud suction branch pipe, and the mud suction port of the mud suction branch pipe is connected to a mud collecting tray.

[0009] By adopting the above technical solution, the mud collecting plate is mainly used to centrally collect the sludge precipitated in the sewage after biological treatment, ensuring that the sludge can be centrally sucked from the mud suction port of the mud suction branch pipe.

[0010] Furthermore, a support is installed at the top of the mud suction pipe connecting vessel, and a working bridge is connected to the top of the support.

[0011] By adopting the above technical solution, the support can ensure a reliable connection between the working bridge and the central column, and both ends of the working bridge are fixed on the wall of the main structure of the sedimentation tank, which is convenient for staff to walk, inspect and maintain.

[0012] Furthermore, the mud discharge pipe is connected with the mud suction main pipe and the inside of the mud suction branch pipe through the mud suction pipe connecting device.

[0013] By adopting the above technical solution, the sludge after suction can be ensured to smoothly enter the sludge discharge pipe under the action of the sludge suction pipe connecting vessel.

[0014] Furthermore, the mud discharge pipe passes through the central column, and the mud discharge port of the mud discharge pipe extends out of the central column.

[0015] By adopting the above technical solution, it is ensured that the sludge entering the sludge discharge pipe can be smoothly discharged from the secondary sedimentation tank.

[0016] Furthermore, the embedded steel plate is an annular stainless steel plate, and the central column is welded to the embedded steel plate and the column base reinforcement steel plate.

[0017] By adopting the above technical solution, the design of the column foot reinforcement steel plate and the embedded steel plate makes the installation process of the central column faster, and also facilitates the convenient inspection and maintenance of the central column when it is damaged in the later stage.

[0018] Furthermore, the bracket platform is bolted to the mud suction pipe communicating vessel, and the mud suction main pipe is flange-connected to the mud suction pipe communicating vessel.

[0019] By adopting the above technical solution, the reliable installation of the sludge suction pipe connecting device on the central column can be ensured, and the convenient transportation of the sludge after suction can be ensured.

[0020] Furthermore, the mud suction main pipe is connected to the mud suction branch pipe via a flange, and the diameter of the mud suction main pipe gradually decreases from one end connected to the mud suction pipe connecting vessel to the other end.

[0021] By adopting the above technical solution, it can be ensured that the sludge pumped by the sludge suction branch pipe can smoothly enter the sludge suction main pipe.

[0022] Furthermore, a suspension rod is installed between the mud suction main pipe and the working bridge, and the suspension rod is bolted to the working bridge and the connecting pieces provided on the mud suction main pipe.

[0023] By adopting the above technical solution, the mud suction main pipe can be ensured to be more stable during installation under the action of the suspension rod.

[0024] Furthermore, a gap is reserved between the mud collecting tray and the base, and the mud suction port of the mud suction branch pipe is in direct contact with the mud on the base.

[0025] By adopting the above technical solution, it can be ensured that the sludge settled on the base can be smoothly sucked away by the sludge suction branch pipe.

[0026] (III) Beneficial effects

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] In order to solve the current problem that the secondary sedimentation tank process of small sewage treatment plants generally adopts the mode of middle water inlet and sludge discharge and peripheral drainage; the central tube of the secondary sedimentation tank is a cast-in-place concrete structure with an inner thickness of 400-600mm, and a 200-300mm sludge return pipe is installed in the tube. The construction space is small and installation and removal are more difficult. During the operation of the sewage treatment plant, if the pre-buried water inlet pipe and sludge pipe are damaged, the cast-in-place concrete must be removed during maintenance to repair the pipe and then re-make the central cast-in-place concrete. During this process, the sewage treatment plant needs to stop water for a long time, which brings great sewage treatment pressure and environmental protection to the sewage treatment plant. In order to solve the problem of pressure, the utility model adopts a central column composed of a steel central tube to replace the original concrete central tube in the secondary sedimentation tank, and prefabricates the mud discharge pipe and the central column through a mud discharge pipe reinforcement steel plate. It not only saves the disadvantages of difficult installation and removal of the cast-in-place concrete central tube template in the civil construction of the secondary sedimentation tank, but also solves the problem of difficulty in unblocking the mud discharge pipe after blockage during the use of the sewage treatment plant, improves the maintenance efficiency, and alleviates the operating pressure and environmental pressure of the sewage treatment plant during maintenance. In addition, the use of prefabricated and assembled central columns and mud discharge pipes reduces the construction and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a secondary sedimentation tank central treatment device of a small-scale sewage treatment plant described in the utility model;

[0030] Figure 2 It is a structural schematic diagram of a central column in a central treatment device of a secondary sedimentation tank of a small-scale sewage treatment plant described in the utility model.

[0031] The following are the descriptions of the reference numerals:

[0032] 1. Working bridge; 2. Mud suction main pipe; 3. Mud suction pipe connecting piece; 4. Bracket platform; 5. Central column; 6. Mud discharge pipe; 7. Base; 8. Mud suction branch pipe; 9. Mud collecting tray; 10. Embedded steel plate; 11. Mud discharge pipe reinforcement steel plate; 12. Column foot reinforcement steel plate; 13. Support; 14. Suspension rod. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] like Figure 1-Figure 2 As shown, a central treatment device for a secondary sedimentation tank of a small-scale sewage treatment plant in this embodiment includes a base 7, a central column 5 made of a steel central tube is installed in the middle of the upper end of the base 7, a pre-buried steel plate 10 is installed at the connection between the bottom end of the central column 5 and the base 7, and a column foot reinforcement steel plate 12 is installed at the connection between the lower part of the outer wall of the central column 5 and the pre-buried steel plate 10. The design of the column foot reinforcement steel plate 12 and the pre-buried steel plate 10 makes the installation process of the central column 5 faster and also facilitates the central column 5 to be damaged in the later stage. For convenient inspection and maintenance, the mud discharge pipe 6 is connected to the inner upper side of the central column 5 through the mud discharge pipe reinforcement steel plate 11, and a bracket platform 4 is also installed on the top of the central column 5. By adopting the water inlet and mud discharge assembly structure composed of the central column 5 and the assembled mud discharge pipe 6, the difficulty of installing and dismantling the cast-in-place concrete central tube formwork is eliminated in civil construction. At the same time, the problem of difficulty in unblocking the mud discharge pipe 6 after blockage during the use of the sewage treatment plant is solved, which improves the inspection efficiency and alleviates the operating pressure and environmental protection pressure of the sewage treatment plant during inspection.

[0035] like Figure 1-Figure 2 As shown, in this embodiment, the top of the bracket platform 4 is connected to the mud suction main pipe 2 through the mud suction pipe communicator 3, the mud suction port of the mud suction main pipe 2 is connected to the mud suction branch pipe 8, and the mud suction port of the mud suction branch pipe 8 is connected to the mud collecting plate 9, the mud collecting plate 9 is mainly used to collect the sludge precipitated in the sewage after biological treatment, to ensure that the sludge can be centrally sucked from the mud suction port of the mud suction branch pipe 8, the mud discharge pipe 6 is connected with the mud suction main pipe 2 and the inside of the mud suction branch pipe 8 through the mud suction pipe communicator 3, and under the action of the mud suction pipe communicator 3, it can be ensured that the sucked sludge can smoothly enter the mud discharge pipe 6.

[0036] like Figure 1-Figure 2 As shown, in this embodiment, a support 13 is also installed on the top of the mud suction pipe connecting vessel 3, and a working bridge 1 is connected to the top of the support 13. The support 13 can ensure a reliable connection between the working bridge 1 and the central column 5. Both ends of the working bridge 1 are fixed on the wall of the main structure of the sedimentation tank, which is convenient for the staff to walk, inspect and maintain.

[0037] like Figure 1-Figure 2 As shown, in this embodiment, the mud discharge pipe 6 passes through the central column 5, and the mud discharge port of the mud discharge pipe 6 extends out of the central column 5, ensuring that the sludge entering the mud discharge pipe 6 can be smoothly discharged from the secondary sedimentation tank, the embedded steel plate 10 is an annular stainless steel plate, the central column 5 and the embedded steel plate 10 and the column foot reinforcement steel plate 12 are all welded, the bracket platform 4 is bolted to the mud suction pipe communicator 3, and the mud suction main pipe 2 is flange-connected to the mud suction pipe communicator 3, which can ensure the reliable installation of the mud suction pipe communicator 3 on the central column 5 and ensure the convenient transportation of the sludge after suction.

[0038] like Figure 1-Figure 2 As shown, in this embodiment, the mud suction main pipe 2 is connected to the mud suction branch pipe 8 through a flange, and the diameter of the mud suction main pipe 2 is gradually reduced from one end connected to the mud suction pipe communicating vessel 3 to the other end, which can ensure that the sludge pumped by the mud suction branch pipe 8 can smoothly enter the mud suction main pipe 2, and a suspension rod 14 is also installed between the mud suction main pipe 2 and the working bridge 1, and the suspension rod 14 is bolted to the working bridge 1 and the connecting parts on the mud suction main pipe 2. Under the action of the suspension rod 14, the mud suction main pipe 2 can be more stable during installation, and a gap is reserved between the mud collecting tray 9 and the base 7. The mud suction port of the mud suction branch pipe 8 is in direct contact with the sludge on the base 7, which can ensure that the sludge deposited on the base 7 can be smoothly sucked away by the mud suction branch pipe 8.

[0039] The specific implementation process of this embodiment is as follows: when the civil engineering structure is constructed in the secondary sedimentation tank, it is necessary to embed the embedded steel plate 10 made of annular stainless steel plate on the base 7 in advance. When the equipment is installed, the processed central column 5 is welded to the embedded steel plate 10. After the central column 5 is installed, the central position and verticality deviation of the central column 5 are checked. After confirmation, the bracket platform 4 is installed on the central column 5, and the horizontal deviation of the bracket platform 4 is checked. Finally, the mud suction pipe connecting vessel 3, the mud suction main pipe 2, the mud suction branch pipe 8, the support 13 and the working bridge 1 are installed, so that the central processing device of the secondary sedimentation tank can be put into use. During use, a central column 5 composed of a steel central tube is used to replace the original concrete central tube in the secondary sedimentation tank, and the mud discharge pipe 6 and the central column 5 are prefabricated and connected through a mud discharge pipe reinforcement steel plate 11. This not only eliminates the disadvantages of the difficulty in installing and removing the cast-in-place concrete central tube template in the civil construction of the secondary sedimentation tank, but also solves the problem of difficulty in unblocking the mud discharge pipe 6 after blockage during the use of the sewage treatment plant, improves the maintenance efficiency, and alleviates the operating pressure and environmental protection pressure of the sewage treatment plant during maintenance. The use of prefabricated and assembled central column 5 and mud discharge pipe 6 reduces the construction and maintenance costs.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A secondary sedimentation tank central treatment device for a small-scale sewage treatment plant, characterized in that: The utility model comprises a base (7), wherein a central column (5) made of a steel central tube is installed in the middle of the upper end of the base (7), an embedded steel plate (10) is installed at the connection between the bottom end of the central column (5) and the base (7), a column foot reinforcement steel plate (12) is installed at the connection between the lower part of the outer wall of the central column (5) and the embedded steel plate (10), the inner upper side of the central column (5) is connected to a mud discharge pipe (6) via a mud discharge pipe reinforcement steel plate (11), and a bracket platform (4) is also installed at the top of the central column (5).

2. According to claim 1, a secondary sedimentation tank central treatment device for a small-scale sewage treatment plant is characterized by: The top of the bracket platform (4) is connected to a mud suction main pipe (2) via a mud suction pipe communicating device (3); the mud suction port of the mud suction main pipe (2) is connected to a mud suction branch pipe (8); and the mud suction port of the mud suction branch pipe (8) is connected to a mud collecting tray (9).

3. A secondary sedimentation tank central treatment device for a small-scale sewage treatment plant according to claim 2, characterized in that: A support (13) is also installed at the top end of the mud suction pipe connecting vessel (3), and a working bridge (1) is connected to the top end of the support (13).

4. A secondary sedimentation tank central treatment device for a small-scale sewage treatment plant according to claim 2, characterized in that: The mud discharge pipe (6) is connected to the mud suction main pipe (2) and the interior of the mud suction branch pipe (8) through the mud suction pipe connecting device (3).

5. The secondary sedimentation tank central treatment device of a small-scale sewage treatment plant according to claim 1 is characterized by: The mud discharge pipe (6) passes through the central column (5), and the mud discharge port of the mud discharge pipe (6) extends out of the central column (5).

6. The secondary sedimentation tank central treatment device of a small-scale sewage treatment plant according to claim 1 is characterized by: The embedded steel plate (10) is an annular stainless steel plate, and the central column (5) is welded to the embedded steel plate (10) and the column foot reinforcement steel plate (12).

7. The secondary sedimentation tank central treatment device of a small-scale sewage treatment plant according to claim 2 is characterized by: The bracket platform (4) is bolted to the mud suction pipe connecting piece (3), and the mud suction main pipe (2) is flange-connected to the mud suction pipe connecting piece (3).

8. The secondary sedimentation tank central treatment device of a small-scale sewage treatment plant according to claim 2 is characterized by: The mud suction main pipe (2) is connected to the mud suction branch pipe (8) via a flange, and the diameter of the mud suction main pipe (2) gradually decreases from one end connected to the mud suction pipe connecting vessel (3) to the other end.

9. The secondary sedimentation tank central treatment device of a small-scale sewage treatment plant according to claim 3 is characterized by: A suspension rod (14) is also installed between the mud suction main pipe (2) and the working bridge (1), and the suspension rod (14) is bolted to the working bridge (1) and the connecting parts provided on the mud suction main pipe (2).

10. The secondary sedimentation tank central treatment device of a small-scale sewage treatment plant according to claim 2, characterized in that: A gap is reserved between the mud collecting plate (9) and the base (7), and the mud suction port of the mud suction branch pipe (8) is in direct contact with the mud on the base (7).

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