Anaerobic tower sludge discharge system with positive and negative taper structure

Abstract

The utility model discloses an anaerobic tower sludge discharge system with positive and reverse taper structure, including jar body, flush subassembly and sludge discharge subassembly, and the sludge discharge ditch is formed between first guide plate and second guide plate, and the first guide plate is reverse taper structure, and the first guide plate is equipped with the first taper surface for guiding sludge to the center convergence and flowing to the sludge discharge ditch, and the second guide plate is positive taper structure, and the second guide plate is equipped with the second taper surface for guiding sludge along its inclined plane and flowing to the sludge discharge ditch, the design makes sludge slide along the first taper surface and the second taper surface, and cannot stay on the first taper surface and the second taper surface, realizes sludge efficient convergence to annular sludge discharge ditch, and the flush subassembly is used for washing the sludge of sludge discharge ditch, and the sludge discharge subassembly is used for discharging the sludge of sludge discharge ditch, and a plurality of flush pipes and sludge discharge branch pipes are evenly distributed and set along the circumference of sludge discharge ditch, and the flush pipe and sludge discharge branch pipe cover the full circumference of jar bottom, and there is no any deposition blind area, guarantee anaerobic tower sludge discharge stability, avoid sludge hardening.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment technology, specifically to an anaerobic tower sludge discharge system with a positive and negative cone structure. Background Technology

[0002] The core function of the anaerobic tower is to degrade organic matter in wastewater using anaerobic microorganisms. The activity of anaerobic granular sludge during the pollutant degradation process directly determines the pollutant removal efficiency. Light granular sludge has a larger specific surface area, high mass transfer efficiency, and strong activity, so it can effectively separate light and heavy granular sludge, which directly affects the system's treatment efficiency.

[0003] The anaerobic sludge removal structures on the market are mainly divided into flat-bottomed tanks and single-sloped tanks.

[0004] However, during use, sludge tends to accumulate in the center of the flat-bottomed tank. The sludge discharge pipe can only extract local sludge, and dead spots of sludge accumulation are easily formed in the areas that the sludge discharge pipe cannot reach, leading to sludge accumulation. On the one hand, the sludge accumulation reduces the effective volume in the tower and reduces the reaction efficiency. On the other hand, the accumulated sludge cannot be discharged, causing the sludge to harden, solidify, and calcify, thereby blocking the water inlet or sludge discharge pipes, and ultimately causing the anaerobic treatment system to collapse.

[0005] Although the bottom of a single-sloped tank has a slope to guide the flow of sludge, the slope angle is fixed (mostly 30° to 40°), resulting in high resistance to sludge sliding and easy deposition in the middle of the slope. Dead corners for sludge discharge still exist. The bottom of a single-sloped tank cannot effectively stratify granular sludge. Light and heavy sludge mix and slide down, and a large amount of light nascent sludge is discharged from the anaerobic tower, thereby reducing the overall activity of the sludge.

[0006] Therefore, there is an urgent need for an anaerobic tower sludge discharge system that features no dead zones in sludge discharge, clear sludge stratification, and strong self-cleaning capabilities, in order to solve the practical operation and maintenance problems of existing sludge discharge systems. Utility Model Content

[0007] In order to overcome the shortcomings of existing technical solutions, this utility model provides an anaerobic tower sludge discharge system with a positive and negative cone structure, which can effectively solve the technical problems mentioned in the background art.

[0008] The technical solution adopted by this utility model to solve its technical problem is: an anaerobic tower sludge discharge system with a positive and negative cone structure, including a tank, a flushing component, and a sludge discharge component. The tank is equipped with a first guide plate and a second guide plate. The second guide plate is located at the center of the tank. There is a gap between the first guide plate and the second guide plate to form a sludge discharge ditch. The first guide plate has a first conical surface for guiding sludge to converge towards the center and flow into the sludge discharge ditch. The second guide plate has a second conical surface for guiding sludge to flow along its inclined surface into the sludge discharge ditch. The flushing component is used to flush the sludge in the sludge discharge ditch, and the sludge discharge component is used to discharge the sludge in the sludge discharge ditch.

[0009] Furthermore, the first guide plate is an inverted cone structure, the second guide plate is a positive cone structure, and the sludge discharge ditch is annular in shape, with the cone angle of the first guide plate and the second guide plate ranging from 40° to 70°.

[0010] Furthermore, the height of the first guide plate is 0.15-0.25 times the diameter of the tank, and the height of the second guide plate is 0.20-0.50 times the diameter of the tank.

[0011] Furthermore, the tank includes a bottom plate and side plates. The bottom plate is circular, and the side plates surround the edge of the bottom plate, making the tank cylindrical. The first guide plate and the second guide plate are both fixedly mounted on the bottom plate, and the flushing assembly is mounted above the bottom plate.

[0012] Furthermore, the flushing assembly is installed inside the second guide plate. The flushing assembly includes a water tank and multiple flushing pipes. The water tank is connected to a main water inlet pipe, and a pressure stabilizing buffer module is installed inside the water tank.

[0013] Furthermore, multiple flushing pipes are evenly distributed around the sludge discharge ditch, with a spacing of 1m-2m between adjacent flushing pipes. One end of each flushing pipe passes through the second guide plate and connects to the sludge discharge ditch, while the other end connects to the water tank.

[0014] Furthermore, the sludge discharge assembly includes a sludge discharge main pipe and multiple sludge discharge branch pipes. The sludge discharge main pipe is located on the outside of the tank body. One end of each sludge discharge branch pipe passes through the side plate and the first guide plate and is connected to the sludge discharge ditch. The other end is connected to the sludge discharge main pipe.

[0015] Furthermore, multiple sludge discharge branch pipes are evenly distributed along the circumference of the sludge discharge ditch, with a spacing of 1m-3m between adjacent sludge discharge branch pipes, and each sludge discharge branch pipe is equipped with a valve.

[0016] Furthermore, the main sludge discharge pipe is connected to at least one cleaning pipe, which is used to clean the main sludge discharge pipe and multiple branch sludge discharge pipes.

[0017] Furthermore, there are two cleaning pipes, namely a first cleaning pipe and a second cleaning pipe. The first cleaning pipe is connected to the main water inlet pipe, and the main sludge discharge pipe is connected to the first cleaning pipe and the second cleaning pipe respectively through a three-way valve.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The first guide plate is an inverted cone structure, with a first cone surface for guiding sludge to converge towards the center and flow into the sludge discharge ditch. The second guide plate is a positive cone structure, with a second cone surface for guiding sludge to flow along its inclined surface into the sludge discharge ditch. This design allows sludge to slide down along the first and second cone surfaces, preventing it from accumulating on them, thus achieving efficient sludge convergence into the annular sludge discharge ditch. Multiple flushing pipes are evenly distributed around the circumference of the sludge discharge ditch, and multiple sludge discharge branch pipes are also evenly distributed around the circumference of the sludge discharge ditch. The flushing pipes and sludge discharge branch pipes cover the entire circumference of the tank bottom, eliminating any sedimentation blind spots, ensuring stable sludge discharge from the anaerobic tower, and preventing sludge caking.

[0020] 2. During the washing process, the smaller light granular sludge flows upward with the flushing water back to the anaerobic reaction zone, thereby maintaining a high concentration of active sludge. However, some larger heavy granular sludge is deposited at the bottom of the sludge discharge ditch due to gravity and is then discharged in a directional manner by the sludge discharge system to avoid ineffective sludge occupying space and to improve the sludge activity and organic matter removal efficiency of the anaerobic system.

[0021] 3. Set up a first cleaning pipe and a second cleaning pipe. After the sludge discharge is completed, provide a high-pressure flush of 0.5-1.0MPa through the backwash pipe, or use the raw water from the main water inlet pipe to flush the sludge discharge main pipe and sludge discharge branch pipe, thereby removing the stubborn sludge adhering to the inner wall of the sludge discharge main pipe and sludge discharge branch pipe to prevent sludge from hardening and clogging. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a sludge removal system for an anaerobic tower with a positive and negative cone structure.

[0023] Figure 2 An exploded view of an anaerobic tower sludge removal system with a positive and negative cone structure;

[0024] Figure 3 A top view of an anaerobic tower sludge removal system with a positive and negative cone structure;

[0025] Figure 4 This is a cross-sectional view of an anaerobic tower sludge removal system with a positive and negative cone structure.

[0026] Numbering on the map:

[0027] 1. Side plate; 2. Main sludge discharge pipe; 3. Valve; 4. Sludge discharge ditch; 5. Bottom plate; 6. First guide plate; 7. Second guide plate; 8. Main water inlet pipe; 9. Flushing pipe; 10. Water tank; 11. First cleaning pipe; 12. Second cleaning pipe; 14. Sludge discharge branch pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1-4 As shown, this utility model provides an anaerobic tower sludge discharge system with a positive and negative cone structure, including a tank, a flushing assembly, and a sludge discharge assembly. The tank includes a bottom plate 5 and a side plate 1. The bottom plate 5 is circular, and the side plate 1 surrounds the edge of the bottom plate 5, making the tank cylindrical. The tank is equipped with a first guide plate 6 and a second guide plate 7. The second guide plate 7 is located at the center of the tank, and there is a gap between the first guide plate 6 and the second guide plate 7 to form a sludge discharge ditch 4.

[0030] The first guide plate 6 has an inverted cone structure and a first conical surface for guiding sludge to converge towards the center and flow into the sludge discharge ditch 4. The second guide plate 7 has a convex cone structure and a second conical surface for guiding sludge along its inclined surface into the sludge discharge ditch 4. The horizontal distance between the first guide plate 6 and the second guide plate 7 is 0.5m-2.0m, making the sludge discharge ditch 4 annular in shape. The width of the sludge discharge ditch 4 is 0.5m-2.0m. The guide plates 7 are all fixedly installed on the base plate 5, and the flushing assembly is installed above the base plate 5. In addition, the angle range of the cone angle of the first guide plate 6 and the second guide plate 7 is 40°-70°. The height of the first guide plate 6 is 0.15-0.25 times the diameter of the tank, and the height of the second guide plate 7 is 0.20-0.50 times the diameter of the tank. This design allows the sludge to slide down along the first and second cone surfaces and not to remain on the first and second cone surfaces, thereby achieving efficient collection of sludge into the annular sludge discharge ditch 4.

[0031] The flushing assembly is installed inside the second guide plate 7. The flushing assembly is used to flush the sludge at the bottom of the sludge discharge ditch 4. The flushing assembly includes a water tank 10 and multiple flushing pipes 9. The water tank 10 is connected to the main water inlet pipe 8. The water tank 10 is equipped with a pressure stabilizing and buffering module. The multiple flushing pipes 9 are evenly distributed around the sludge discharge ditch 4. The distance between two adjacent flushing pipes 9 is 1m-2m, preferably 1.5m, so as to ensure that the flushing coverage is without blind spots. One end of each flushing pipe 9 passes through the second guide plate 7 and is connected to the sludge discharge ditch 4. The other end is connected to the water tank 10. The pressure stabilizing and buffering module can effectively eliminate the disturbance of water impact on the sludge. During the cleaning, the light granular sludge with smaller particle size flows upward with the flushing water back to the anaerobic reaction zone, thereby maintaining a high concentration of active sludge. However, some heavy granular sludge with larger particle size is deposited at the bottom of the sludge discharge ditch 4 due to gravity and is discharged directionally by the sludge discharge system.

[0032] The sludge discharge assembly is used to discharge the sludge at the bottom of the sludge discharge ditch 4. The sludge discharge assembly includes a sludge discharge main pipe 2 and multiple sludge discharge branch pipes 14. The sludge discharge main pipe 2 is located on the outside of the tank. The multiple sludge discharge branch pipes 14 are evenly distributed around the sludge discharge ditch 4. The distance between two adjacent sludge discharge branch pipes 14 is 1m-3m, preferably 2.0m. One end of each sludge discharge branch pipe 14 passes through the side plate 1 and the first guide plate 6 and is connected to the sludge discharge ditch 4. The other end is connected to the sludge discharge main pipe 2. Each sludge discharge branch pipe 14 is equipped with a valve 3. The sludge discharge main pipe 2 is used to collect the heavy sludge from each sludge discharge branch pipe 14 and finally discharge it outside the tower to the sludge storage tank.

[0033] The sludge discharge main pipe 2 is connected to at least one cleaning pipe, which is used to clean the sludge discharge main pipe 2 and multiple sludge discharge branch pipes 14. In this embodiment, there are two cleaning pipes, namely the first cleaning pipe 11 and the second cleaning pipe 12. The sludge discharge main pipe 2 is connected to the first cleaning pipe 11 and the second cleaning pipe 12 through a three-way valve. The first cleaning pipe 11 is connected to the water inlet main pipe 8, and the second cleaning pipe 12 is connected to a high-pressure clean water or nitrogen backwashing pipeline. After the sludge discharge is completed, the three-way valve is switched to start the backwashing function. In one way, a high pressure of 0.5-1.0 MPa is provided through the backwashing pipeline to flush away the stubborn sludge adhering to the inner wall of the sludge discharge main pipe 2 and the sludge discharge branch pipes 14. In another way, the raw water of the water inlet main pipe 8 is used to flush the sludge discharge main pipe 2 and the sludge discharge branch pipes 14 to prevent sludge from hardening and clogging.

[0034] Compared to traditional technologies:

[0035] 1. The first guide plate 6 is an inverted cone structure. The first guide plate 6 has a first cone surface for guiding sludge to converge towards the center and flow to the sludge discharge ditch 4. The second guide plate 7 is a positive cone structure. The second guide plate 7 has a second cone surface for guiding sludge to flow along its inclined surface to the sludge discharge ditch 4. This design allows sludge to slide down along the first and second cone surfaces and not to remain on the first and second cone surfaces, thereby achieving efficient sludge convergence to the annular sludge discharge ditch 4. Multiple flushing pipes 9 are evenly distributed around the circumference of the sludge discharge ditch 4, and multiple sludge discharge branch pipes 14 are evenly distributed around the circumference of the sludge discharge ditch 4. The flushing pipes 9 and sludge discharge branch pipes 14 cover the entire circumference of the tank bottom without any sedimentation blind spots, ensuring stable sludge discharge from the anaerobic tower and preventing sludge caking.

[0036] 2. During the washing process, the smaller light granular sludge flows upward with the flushing water back to the anaerobic reaction zone, thereby maintaining a high concentration of active sludge. However, some larger heavy granular sludge is deposited at the bottom of the sludge discharge ditch 4 due to gravity and is discharged in a directional manner by the sludge discharge system to avoid ineffective sludge occupying space and to improve the sludge activity and organic matter removal efficiency of the anaerobic system.

[0037] 3. Set up a first cleaning pipe 11 and a second cleaning pipe 12. After the sludge discharge is completed, provide a high-pressure flush of 0.5-1.0MPa through the backwash pipe, or use the raw water from the inlet water pipe 8 to flush the sludge discharge main pipe 2 and the sludge discharge branch pipe 14, thereby removing the stubborn sludge adhering to the inner wall of the sludge discharge main pipe 2 and the sludge discharge branch pipe 14 to prevent sludge from hardening and clogging.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An anaerobic tank sludge discharge system having a positive and negative taper structure, characterized by, The device includes a tank, a flushing assembly, and a sludge discharge assembly. The tank is internally equipped with a first guide plate and a second guide plate. The second guide plate is located at the center of the tank. There is a gap between the first guide plate and the second guide plate to form a sludge discharge ditch. The first guide plate has a first conical surface for guiding sludge to converge towards the center and flow into the sludge discharge ditch. The second guide plate has a second conical surface for guiding sludge to flow along its inclined surface into the sludge discharge ditch. The flushing assembly is used to flush the sludge in the sludge discharge ditch, and the sludge discharge assembly is used to discharge the sludge from the sludge discharge ditch.

2. The anaerobic tank sludge discharge system with positive and reverse taper structure according to claim 1, characterized in that, The first guide plate has an inverted cone structure, and the second guide plate has a positive cone structure, making the sludge discharge ditch ring-shaped, and the cone angle of the first guide plate and the second guide plate ranges from 40° to 70°.

3. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 2, characterized in that, The height of the first guide plate is 0.15-0.25 times the diameter of the tank, and the height of the second guide plate is 0.20-0.50 times the diameter of the tank.

4. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 1, characterized in that, The tank includes a bottom plate and side plates. The bottom plate is circular, and the side plates surround the edge of the bottom plate, making the tank cylindrical. The first guide plate and the second guide plate are fixedly mounted on the bottom plate, and the flushing assembly is mounted above the bottom plate.

5. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 4, characterized in that, The flushing assembly is installed inside the second guide plate. The flushing assembly includes a water tank and multiple flushing pipes. The water tank is connected to a main water inlet pipe, and a pressure stabilizing buffer module is installed inside the water tank.

6. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 5, characterized in that, Multiple flushing pipes are evenly distributed around the sludge discharge ditch, with a spacing of 1m-2m between adjacent flushing pipes. One end of each flushing pipe passes through the second guide plate and connects to the sludge discharge ditch, while the other end connects to the water tank.

7. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 4, characterized in that, The sludge discharge assembly includes a sludge discharge main pipe and multiple sludge discharge branch pipes. The sludge discharge main pipe is located on the outside of the tank body. One end of each sludge discharge branch pipe passes through the side plate and the first guide plate and is connected to the sludge discharge ditch. The other end is connected to the sludge discharge main pipe.

8. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 7, characterized in that, Multiple sludge discharge branch pipes are evenly distributed along the circumference of the sludge discharge ditch, with a spacing of 1m-3m between adjacent sludge discharge branch pipes, and each sludge discharge branch pipe is equipped with a valve.

9. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 7, characterized in that, The main sludge discharge pipe is connected to at least one cleaning pipe, which is used to clean the main sludge discharge pipe and multiple branch sludge discharge pipes.

10. The anaerobic tank sludge discharge system with positive and negative taper structure according to claim 9, characterized in that, There are two cleaning pipes, namely the first cleaning pipe and the second cleaning pipe. The first cleaning pipe is connected to the main water inlet pipe, and the main sludge discharge pipe is connected to the first cleaning pipe and the second cleaning pipe through a three-way valve.

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