Nitrification liquid backflow guide pipe device

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a nitrification liquid backflow guide pipe device which comprises a backflow pipe and an annular pipe, a plurality of backflow holes are formed in one end of the backflow pipe, and connecting pipes are installed at the positions of the backflow holes through filtering assemblies. The ends, away from the backflow pipe, of the multiple connecting pipes are connected with the annular pipe and communicate with the interior, the backflow pipe is located on the central axis of the annular pipe, the multiple connecting pipes are circumferentially arranged on the annular pipe at equal intervals, the multiple vertical pipes are vertically and fixedly installed on the lower surface of the annular pipe at equal intervals, and the lower ends of the multiple vertical pipes are sealed. A plurality of liquid outlet holes are formed in the side faces of the vertical pipes at equal intervals, and the upper ends of the vertical pipes communicate with the interior of the annular pipe. According to the utility model, nitrification liquid can be uniformly distributed in each area of the anoxic tank through the plurality of vertical pipes and the air outlet holes, so that denitrification reaction is uniformly distributed in space, and the nitrogen removal effect of the whole sewage treatment system is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a nitrification liquid return guide pipe device. Background Technology

[0002] In the wastewater treatment process, nitrification liquor recirculation is an extremely important step, generally referred to as internal recirculation. After the nitrification liquor is recirculated from the aerobic tank to the anoxic tank, it mixes with the wastewater in the anoxic tank. Denitrifying bacteria convert the nitrates in the nitrification liquor into nitrogen gas through biological denitrification and release it into the atmosphere, thereby achieving the purpose of denitrification.

[0003] In existing technologies, when nitrifying liquid is returned to the anoxic tank, it cannot be evenly distributed throughout the anoxic tank and can only be concentrated in local areas. This results in uneven spatial distribution of the denitrification reaction, affecting the nitrogen removal efficiency of the entire wastewater treatment system. Utility Model Content

[0004] The purpose of this invention is to address the following shortcomings in the existing technology: when nitrifying liquid is returned to the anoxic tank, it cannot be evenly distributed in all areas of the anoxic tank, but can only be concentrated in local areas. This leads to uneven spatial distribution of the denitrification reaction, affecting the nitrogen removal effect of the entire wastewater treatment system. Therefore, a nitrifying liquid return guide pipe device is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A nitrification liquid reflux guide pipe device includes a reflux pipe and an annular pipe. One end of the reflux pipe is sealed, and multiple reflux holes are opened at one end of the reflux pipe. Each of the multiple reflux holes is connected to a connecting pipe through a filter assembly. The ends of the multiple connecting pipes away from the reflux pipe are connected to the annular pipe and communicate with the interior. The reflux pipe is located on the central axis of the annular pipe, and the multiple connecting pipes are equidistantly arranged on the annular pipe.

[0007] Multiple vertical tubes are fixedly installed at equal intervals on the lower surface of the annular tube. The lower ends of the multiple vertical tubes are all sealed. Multiple liquid outlet holes are opened at equal intervals on the sides of the multiple vertical tubes. The upper ends of the vertical tubes are connected to the interior of the annular tube.

[0008] Preferably, the filter assembly includes a filter tube, a filter screen, and a sealing plug. The filter tube is installed obliquely at the lower end of the return pipe, and the upper end of the filter tube is connected to the return hole. The sealing plug is threadedly connected to the lower end of the filter tube. A connecting hole is provided in the middle part of the filter tube. The filter screen is fixedly installed in the connecting hole. The end of the connecting tube away from the annular pipe is fixedly connected to the connecting hole.

[0009] Preferably, a sealing ring is fixedly installed at one end of the sealing plug, and the sealing ring is in contact with the inner wall of the filter tube.

[0010] Preferably, a plurality of the reflux holes are circumferentially arranged at the lower end of the reflux pipe, and a flow divider block with a triangular longitudinal section is fixedly installed at the lower end of the reflux pipe.

[0011] Preferably, the diversion block has multiple diversion grooves on its side, and the multiple diversion grooves correspond to multiple return holes respectively.

[0012] Preferably, the inside of the reflux pipe is coated with an anti-corrosion layer, and a flow regulating valve is fixedly installed inside the reflux pipe.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. A ring pipe and multiple vertical pipes are installed in the anoxic tank, and one end of the return pipe is installed in the aerobic tank. The nitrified liquid in the aerobic tank can be returned to the ring pipe through the return pipe. Then, the nitrified liquid can be evenly distributed in various areas of the anoxic tank through multiple vertical pipes and air outlets, so that the denitrification reaction is evenly distributed in space and the nitrogen removal efficiency of the entire wastewater treatment system is improved.

[0015] 2. Before entering the annular pipe, the nitrified liquid in the return pipe is filtered by the cooperation of filter tubes, filter screens and sealing plugs to remove impurities from the nitrified liquid, prevent excessive impurities from clogging the connecting pipes, and enable the sewage treatment system to operate continuously and stably. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a nitration liquid reflux guide pipe device proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of a three-dimensional partial cross-sectional structure of the return pipe, filter assembly, and connecting pipe;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the flow divider;

[0019] Figure 4 This is a schematic diagram of a three-dimensional partial cross-sectional structure of the filter assembly.

[0020] In the diagram: 1. Return pipe, 2. Ring pipe, 3. Connecting pipe, 4. Vertical pipe, 5. Liquid outlet, 6. Filter pipe, 7. Filter screen, 8. Sealing plug, 9. Diverter block, 10. Drainage groove, 11. Flow regulating valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A nitrification liquid reflux guide pipe device includes a reflux pipe 1 and an annular pipe 2. One end of the reflux pipe 1 is sealed, and multiple reflux holes are opened at one end of the reflux pipe 1. Each of the multiple reflux holes is connected to a connecting pipe 3 through a filter assembly. The ends of the multiple connecting pipes 3 away from the reflux pipe 1 are all connected to the annular pipe 2 and communicate with the interior. The reflux pipe 1 is located on the central axis of the annular pipe 2. The multiple connecting pipes 3 are equidistantly arranged circumferentially on the annular pipe 2. Multiple vertical pipes 4 are vertically and equidistantly fixed on the lower surface of the annular pipe 2. The lower ends of the multiple vertical pipes 4 are all sealed. Multiple liquid outlet holes 5 are equidistantly opened on the sides of the multiple vertical pipes 4. The upper ends of the vertical pipes 4 are connected to the interior of the annular pipe 2.

[0023] The annular pipe 2 and multiple vertical pipes 4 are installed in the anoxic tank, and the other end of the return pipe 1 is installed in the aerobic tank, and a liquid pump (not shown in the figure) is installed there. When it is necessary to return the nitrified liquid, the liquid pump is started to draw the nitrified liquid in the aerobic tank into the return pipe 1, and then it is distributed into multiple connecting pipes 3 through the filter components. Under the action of the multiple connecting pipes 3, the nitrified liquid enters the annular pipe 2 evenly, and then enters the multiple vertical pipes 4 separately, and flows out through multiple liquid outlets 5. The multiple vertical pipes 4 are evenly distributed in various areas of the anoxic tank, so that the nitrified liquid can be evenly distributed in various areas of the anoxic tank, making the denitrification reaction evenly distributed in space and improving the nitrogen removal efficiency of the entire wastewater treatment system.

[0024] The filter assembly includes a filter tube 6, a filter screen 7, and a sealing plug 8. The filter tube 6 is installed at an angle at the lower end of the return pipe 1, and the upper end of the filter tube 6 is connected to the return hole. The sealing plug 8 is threaded to the lower end of the filter tube 6. A connection hole is opened in the middle part of the filter tube 6. The filter screen 7 is fixedly installed in the connection hole. The end of the connecting pipe 3 away from the annular pipe 2 is fixedly connected to the connection hole. A sealing ring is fixedly installed at one end of the sealing plug 8, and the sealing ring is in contact with the inner wall of the filter tube 6.

[0025] The filter tube 6 is installed at an angle at the lower end of the return pipe 1. The nitrified liquid in the return pipe 1 will enter the filter tube 6 through the return hole. The nitrified liquid will first fill the filter tube 6 and then pass through the filter screen 7 into the connecting pipe 3. The impurities in the nitrified liquid will be filtered by the filter screen 7 into the filter tube 6. Since the filter tube 6 is in an inclined state, the filtered impurities will accumulate at the bottom of the filter tube 6. When there are too many impurities in the filter tube 6, the sealing plug 8 can be rotated and removed from one end of the filter tube 6. At this time, the impurities in the filter tube 6 can be cleaned from the bottom.

[0026] Multiple reflux holes are circumferentially arranged at the lower end of the reflux pipe 1. A flow divider block 9 with a triangular longitudinal section is fixedly installed at the lower end of the reflux pipe 1. Multiple flow guide grooves 10 are opened on the side of the flow divider block 9. The multiple flow guide grooves 10 correspond to the multiple reflux holes respectively. Before passing through the reflux holes, the nitrified liquid will come into contact with the flow divider block 9. Under the action of the flow divider block 9, the nitrified liquid will be evenly divided into the multiple flow guide grooves 10 and simultaneously enter the multiple reflux holes.

[0027] The inside of the return pipe 1 is coated with an anti-corrosion layer to extend its service life. A flow regulating valve 11 is fixedly installed inside the return pipe 1 to precisely regulate the return flow of the nitrification liquid, adapt to different wastewater treatment process requirements, and also help reduce energy consumption.

[0028] In this invention, the nitrified liquid in the aerobic tank is drawn into the return pipe 1, and then distributed through the filter assembly into multiple connecting pipes 3. Under the action of the multiple connecting pipes 3, the nitrified liquid enters the annular pipe 2 evenly. The nitrified liquid then enters multiple vertical pipes 4 and flows out through multiple outlet holes 5. The multiple vertical pipes 4 are evenly distributed in various areas of the anoxic tank, so that the nitrified liquid can be evenly distributed in various areas of the anoxic tank, making the denitrification reaction evenly distributed in space and improving the nitrogen removal effect of the entire wastewater treatment system.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A nitration liquid reflux guide pipe device, comprising a reflux pipe (1) and an annular pipe (2), characterized in that, One end of the return pipe (1) is sealed, and multiple return holes are opened at one end of the return pipe (1). A connecting pipe (3) is installed at each of the multiple return holes through a filter assembly. The ends of the multiple connecting pipes (3) away from the return pipe (1) are connected to the annular pipe (2) and communicate with the interior. The return pipe (1) is located on the central axis of the annular pipe (2), and the multiple connecting pipes (3) are equidistantly arranged on the annular pipe (2). Multiple vertical tubes (4) are fixedly installed vertically and at equal intervals on the lower surface of the annular tube (2). The lower ends of the multiple vertical tubes (4) are sealed. Multiple liquid outlet holes (5) are opened at equal intervals on the sides of the multiple vertical tubes (4). The upper end of the vertical tubes (4) is connected to the inside of the annular tube (2).

2. The nitration liquid reflux guide pipe device according to claim 1, characterized in that, The filter assembly includes a filter tube (6), a filter screen (7), and a sealing plug (8). The filter tube (6) is installed at an angle at the lower end of the return pipe (1). The upper end of the filter tube (6) is connected to the return hole. The sealing plug (8) is threaded to the lower end of the filter tube (6). A connection hole is provided in the middle part of the filter tube (6). The filter screen (7) is fixedly installed in the connection hole. The end of the connecting tube (3) away from the annular tube (2) is fixedly connected to the connection hole.

3. The nitration liquid reflux guide pipe device according to claim 2, characterized in that, A sealing ring is fixedly installed at one end of the sealing plug (8), and the sealing ring is in contact with the inner wall of the filter tube (6).

4. The nitration liquid reflux guide pipe device according to claim 1, characterized in that, Multiple reflux holes are circumferentially arranged at the lower end of the reflux pipe (1), and a flow divider block (9) with a triangular longitudinal section is fixedly installed at the lower end of the reflux pipe (1).

5. The nitration liquid reflux guide pipe device according to claim 4, characterized in that, The diversion block (9) has multiple diversion grooves (10) on its side, and the multiple diversion grooves (10) correspond to multiple return holes respectively.

6. The nitration liquid reflux guide pipe device according to claim 1, characterized in that, The inside of the return pipe (1) is coated with an anti-corrosion layer, and a flow regulating valve (11) is fixedly installed inside the return pipe (1).

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