Aerobic granular sludge process reaction tank capable of discharging sludge in grading manner

Abstract

The utility model discloses an aerobic granular sludge process reaction tank for graded sludge discharge, which relates to the technical field of sewage biochemical treatment equipment, a sludge discharge assembly comprises a first sludge discharge unit, a second sludge discharge unit, a collecting pipe and a sludge discharge header pipe, the first sludge discharge unit and the second sludge discharge unit are arranged in a tank body, the first sludge discharge unit is arranged above the second sludge discharge unit, the collecting pipe is vertically arranged, a first connecting part is arranged at the upper end of the collecting pipe, a first control valve is arranged on the first connecting part, a second connecting part is arranged at the lower end of the collecting pipe, a second control valve is arranged on the second connecting part, and the first control valve is connected with the second control valve. One end of the first sludge discharge unit is communicated to the first connecting part on the collecting pipe, one end of the second sludge discharge unit is communicated to the second connecting part, one end of the sludge discharge header pipe is communicated to the middle part of the collecting pipe, and sludge discharge at different heights can be carried out according to process requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage biochemical treatment equipment, in particular to an aerobic granular sludge process reaction pool with graded sludge discharge. Background Art

[0002] Aerobic granular sludge process is an emerging sewage treatment process. It is a sewage treatment technology with great economic and social benefits due to its advantages such as small footprint, low investment cost, low operating cost, and simultaneous nitrogen and phosphorus removal. However, due to the uniqueness of this process, its sludge discharge method is different from the existing activated sludge method and biofilm method. In order to ensure that the process maintains a certain proportion of granular sludge during operation, it is necessary to meet the sludge discharge requirements at different heights. However, the sludge discharge equipment in the existing technology cannot automatically adjust the height of the sludge discharge point, the assembly and adjustment process is very cumbersome, and it will stir the sludge that has been precipitated in the tank. Utility Model Content

[0003] The utility model aims to provide an aerobic granular sludge process reaction tank with graded sludge discharge in view of the deficiencies in the prior art.

[0004] An aerobic granular sludge process reaction tank with graded sludge discharge, comprising a tank body, a water inlet assembly, an aeration assembly, a drainage assembly and a sludge discharge assembly, wherein the aeration assembly, the water inlet assembly, the sludge discharge assembly and the drainage assembly are sequentially arranged in the tank body from bottom to top, and the sludge discharge assembly comprises a first sludge discharge unit, a second sludge discharge unit, a conduit and a sludge discharge main pipe, wherein the first sludge discharge unit and the second sludge discharge unit are arranged in the tank body, the first sludge discharge unit is arranged above the second sludge discharge unit, the conduit is arranged vertically, a first connecting portion is arranged at the upper end of the conduit, a first control valve is arranged on the first connecting portion, a second connecting portion is arranged at the lower end of the conduit, a second control valve is arranged on the second connecting portion, one end of the first sludge discharge unit is connected to the first connecting portion on the conduit, one end of the second sludge discharge unit is connected to the second connecting portion, and one end of the sludge discharge main pipe is connected to the middle of the conduit.

[0005] Furthermore, the first mud discharge unit and the second mud discharge unit have the same structure.

[0006] Furthermore, the first mud discharge unit includes an annular mud discharge pipe.

[0007] Furthermore, a plurality of mud discharge ports are evenly distributed on the annular mud discharge pipe.

[0008] Furthermore, a plurality of annular mud discharge pipes are provided, and the first mud discharge unit further comprises a first connecting pipe, the first connecting pipe is respectively connected to the plurality of annular mud discharge pipes, and the first connecting portion of the confluence pipe is connected to the first connecting pipe.

[0009] Furthermore, the pipe axes of the multiple annular mud discharge pipes are in the same plane.

[0010] Furthermore, the plane where the axis of the annular mud discharge pipe is located is a horizontal plane.

[0011] Furthermore, the diameter of the connection portion between the first connecting pipe and the collecting pipe is larger than the diameter of the annular mud discharge pipe.

[0012] Furthermore, a flow meter is provided on the mud discharge main pipe.

[0013] Furthermore, an electrically controlled main valve is provided on the mud discharge main pipe.

[0014] The advantages of the utility model compared with the prior art are:

[0015] First, in this scheme, the first control valve and the second control valve are set to control the on / off of the first sludge discharge unit and the second sludge discharge unit respectively; during operation, the water pressure is used to press the sludge out by static pressure sludge discharge, and the operation of the first sludge discharge unit and the second sludge discharge unit is controlled by the on / off of the first control valve and the second control valve, so that the sludge at different heights in the tank body can be discharged.

[0016] Second, in this solution, an annular mud discharge pipe is provided, on which a number of mud discharge ports are evenly arranged. The annular mud discharge pipe and the number of mud discharge ports can discharge the sludge in the tank body more evenly, thereby preventing uneven mud discharge in the tank body on one side. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the mud discharge component in this scheme;

[0019] Figure 3 This is the main view of the mud discharge component in this scheme;

[0020] Figure 4 for Figure 2 Enlarged structural diagram of point A in the middle.

[0021] Figure numerals: pool body 1, mud discharge assembly 2, first mud discharge unit 3, annular mud discharge pipe 31, mud discharge port 311, first connecting pipe 32, second mud discharge unit 4, conduit 5, first control valve 51, second control valve 52, mud discharge main pipe 6, flow meter 7, electronically controlled main valve 8. DETAILED DESCRIPTION

[0022] Combined with Figure 1-4As shown, an aerobic granular sludge process reaction tank with graded sludge discharge includes a tank body 1, a water inlet component, an aeration component, a drainage component and a sludge discharge component 2. The aeration component, the water inlet component, the sludge discharge component 2 and the drainage component are sequentially arranged in the tank body 1 from bottom to top. The sewage is transported into the tank body 1 through the water inlet component, and the sewage is aerated through the aeration component. After the aeration is completed, the sewage enters the sedimentation stage. The supernatant after sedimentation is discharged through the drainage component, and the sludge at different positions after sedimentation is discharged through the sludge discharge component 2. Because the specific gravity of granular sludge is greater than that of flocculent sludge, the granular sludge has a faster sedimentation speed during the sedimentation process. Therefore, the upper flocculent sludge accounts for a higher proportion of the sludge after sedimentation, and the lower granular sludge accounts for a higher proportion of the sludge. Figure 1-4 The graded mud discharge device shown, the mud discharge component 2 includes a first mud discharge unit 3 and a second mud discharge unit 4. By controlling the operation of the first mud discharge unit 3 and the second mud discharge unit 4, mud discharge at different heights is achieved, thereby ensuring a higher proportion of granular sludge in the reaction tank.

[0023] Preferably, the mud discharge assembly 2 further includes a manifold 5 and a mud discharge main pipe 6, the first mud discharge unit 3 and the second mud discharge unit 4 are arranged in the tank body 1, the first mud discharge unit 3 is arranged above the second mud discharge unit 4, and the sludge at different heights in the tank body 1 can be discharged respectively by the first mud discharge unit 3 and the second mud discharge unit 4, the manifold 5 is vertically arranged, the upper end of the manifold 5 is provided with a first connection part, the first connection part is provided with a first control valve 51, the lower end of the manifold 5 is provided with a second connection part, the second connection part is provided with a second control valve 52, one end of the first mud discharge unit 3 is connected to the first connection part on the manifold 5, one end of the second mud discharge unit 4 is connected to the second connection part, and one end of the mud discharge main pipe 6 is connected to the middle part of the manifold 5, and the first control valve 51 and the second control valve 52 can respectively control the on and off of the first mud discharge unit 3 and the second mud discharge unit 4;

[0024] During operation, water pressure static pressure is used to discharge sludge. The operation of the first sludge discharge unit 3 and the second sludge discharge unit 4 is controlled by controlling the on and off of the first control valve 51 and the second control valve 52, so that sludge at different heights in the tank body 1 can be discharged and the amount of discharged sludge can be controlled.

[0025] It can be selected that the first mud discharge unit 3 and the second mud discharge unit 4 have the same structure, so as to simplify the structure and improve the convenience of processing and installation of the equipment, wherein the first mud discharge unit 3 includes an annular mud discharge pipe 31, and a plurality of mud discharge ports 311 are evenly distributed on the annular mud discharge pipe 31. The annular mud discharge pipe and the plurality of mud discharge ports 311 can discharge the sludge in the tank body 1 more evenly.

[0026] Optionally, a plurality of annular mud discharge pipes 31 are provided, and the first mud discharge unit 3 further includes a first connecting pipe 32, which are respectively connected to the plurality of annular mud discharge pipes 31, and the first connecting portion of the confluence pipe 5 is connected to the first connecting pipe 32, and the plurality of annular mud discharge pipes 31 are connected by the first connecting pipe 32, and the collected sludge is guided to the confluence pipe 5, and the pipe axes of the plurality of annular mud discharge pipes 31 are on the same plane, and the plane where the pipe axes of the annular mud discharge pipes 31 are located is a horizontal plane, so that the plurality of annular mud discharge pipes 31 can discharge the sludge in the same area, and the uniformity of mud discharge can be ensured;

[0027] The number of the annular mud discharge pipes 31 in this scheme can be set according to the cross-section of the sewage in the pool body 1. For this purpose, the present application preferably sets two annular mud discharge pipes 31, and sets a first connecting pipe 32 between the two annular mud discharge pipes 31, and connects the annular mud discharge pipes 31 on both sides through the first connecting pipe 32.

[0028] Preferably, in order to ensure smooth mud discharge from the annular mud discharge pipe 31 , the diameter of the connection portion between the first connecting pipe 32 and the manifold 5 is larger than the diameter of the annular mud discharge pipe 31 , thereby preventing sludge from being blocked in the manifold 5 .

[0029] Preferably, the sludge discharge main pipe 6 is provided with a flow meter 7 and an electrically controlled main valve 8. The flow meter 7 can measure the sludge passing through the sludge discharge main pipe 6, thereby counting the amount of sludge discharged. The passage of the sludge discharge main pipe 6 is adjusted by setting the electrically controlled main valve 8, thereby controlling the start and stop of the sludge discharge component 2.

[0030] When the present solution is in use, the first control valve 51 or the second control valve 52 is opened according to the operation requirements, or the first control valve 51 and the second control valve 52 can be opened at the same time. When it is necessary to discharge the sludge at a higher position (where the proportion of flocculent sludge is high), the first control valve 51 is opened, and the sludge is discharged by static pressure through the annular sludge discharge pipe 31 on the first sludge discharge unit 3 into the conduit 5 and discharged through the sludge discharge main pipe 6; when it is necessary to discharge the sludge at a lower position (where the sludge concentration is high and the proportion of granular sludge is high), the second control valve 52 is opened, and the sludge is discharged by static pressure through the annular sludge discharge pipe 31 on the first sludge discharge unit 3 into the conduit 5 and discharged through the sludge discharge main pipe 6.

[0031] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An aerobic granular sludge process reaction tank with graded sludge discharge, characterized in that: The invention comprises a tank body (1), a water inlet assembly, an aeration assembly, a drainage assembly and a mud discharge assembly (2), wherein the aeration assembly, the water inlet assembly, the mud discharge assembly (2) and the drainage assembly are arranged in sequence in the tank body (1) from bottom to top, and the mud discharge assembly (2) comprises a first mud discharge unit (3), a second mud discharge unit (4), a confluence pipe (5) and a mud discharge main pipe (6), wherein the first mud discharge unit (3) and the second mud discharge unit (4) are arranged in the tank body (1), and the first mud discharge unit (3) is arranged above the second mud discharge unit (4). The manifold (5) is arranged vertically, a first connection portion is arranged at the upper end of the manifold (5), a first control valve (51) is arranged on the first connection portion, a second connection portion is arranged at the lower end of the manifold (5), a second control valve (52) is arranged on the second connection portion, one end of the first mud discharge unit (3) is connected to the first connection portion on the manifold (5), one end of the second mud discharge unit (4) is connected to the second connection portion, and one end of the mud discharge main pipe (6) is connected to the middle of the manifold (5).

2. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 1 is characterized in that: The first mud discharge unit (3) and the second mud discharge unit (4) have the same structure.

3. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 2 is characterized in that: The first mud discharge unit (3) comprises an annular mud discharge pipe (31).

4. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 3 is characterized in that: A plurality of mud discharge openings (311) are evenly distributed on the annular mud discharge pipe (31).

5. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 3 is characterized in that: A plurality of the annular mud discharge pipes (31) are provided, and the first mud discharge unit (3) further comprises a first connecting pipe (32), the first connecting pipe (32) being connected to the plurality of annular mud discharge pipes (31) respectively, and the first connecting portion of the confluence pipe (5) being connected to the first connecting pipe (32).

6. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 5, characterized in that: The pipe axes of the plurality of annular mud discharge pipes (31) are located on the same plane.

7. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 3 is characterized in that: The plane where the pipe axis of the annular mud discharge pipe (31) is located is a horizontal plane.

8. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 5, characterized in that: The diameter of the connection portion between the first connecting pipe (32) and the confluence pipe (5) is greater than the diameter of the annular mud discharge pipe (31).

9. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 1, characterized in that: The mud discharge main pipe (6) is provided with a flow meter (7).

10. The aerobic granular sludge process reaction tank with graded sludge discharge according to claim 1, characterized in that: The mud discharge main pipe (6) is provided with an electric control main valve (8).

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