A novel anaerobic water pipe structure for wastewater treatment

Abstract

This utility model discloses a novel anaerobic water distribution pipe structure for wastewater treatment, relating to the field of anaerobic treatment technology. It includes a main pipe, which is rectangular and connected end-to-end. Flexible pipes are connected to both sides of the main pipe, with the lower ends of the flexible pipes extending into the water distribution pipe. The water distribution pipe is welded to the anaerobic tank. A butterfly valve is connected in series at the connection between the flexible pipe and the main pipe. In this utility model, the main pipe is rectangular overall, but the water flow inside is circular. The single-point flow rate and flow velocity of the circular water distribution are relatively small, resulting in a significantly less impact on the sludge layer at the bottom of the tank compared to centralized water distribution. This helps maintain the stability of the sludge bed, reduces sludge loss or floating, and ensures the activity and population balance of anaerobic microorganisms. When one shut-off valve is opened, water can flow from one side to the other for distribution; when both shut-off valves are opened, water can flow simultaneously from both sides towards the inner end, thus achieving a rapid and uniform water distribution effect.

Description

Technical Field

[0001] This utility model specifically relates to the field of anaerobic treatment technology, and more specifically to a novel anaerobic water distribution pipe structure for wastewater treatment. Background Technology

[0002] Anaerobic distribution pipes are a key component of anaerobic treatment systems, used to evenly distribute wastewater into the anaerobic reactor to promote sufficient contact between the wastewater and anaerobic microorganisms, thereby improving treatment efficiency. Distribution pipes are typically arranged in the following manner:

[0003] One pipe, one point water distribution: Each water inlet pipe is connected to only one water inlet point, which can ensure uniform water distribution, but the number of pipes may be large. It is suitable for small anaerobic reactors with extremely high requirements for water distribution uniformity.

[0004] Multi-point water distribution via a single pipe: This system has a simple structure, similar to a high-resistance water distribution system in a filter bed. Water distribution is achieved by setting multiple outlet holes on a single pipe. However, to achieve uniform water distribution, the water flow velocity at the hole openings needs to be ≥2m / s. This results in relatively small hole diameters, making them prone to clogging, and making uniform water distribution difficult to achieve in practical applications.

[0005] Branched water distribution: Generally, a symmetrical arrangement is adopted. The outlet of the branch pipe is about 200mm from the bottom of the pool and located in the center of the area it serves. The service area of ​​the outlet is 2-4㎡. The minimum diameter of the outlet pipe hole is ≥15mm. A 45° guide plate should be installed at the outlet hole to spread the water to the bottom of the pool, so that the sewage can be distributed more evenly on the bottom of the pool.

[0006] Taking multi-point water distribution and branched water distribution as examples, both use a multi-point water distribution method. This water distribution method has many diameter changes, is prone to clogging, is difficult to inspect and maintain, and is difficult to clean the structure, which is not conducive to the long-term operation of the system. Utility Model Content

[0007] The purpose of this utility model is to provide a novel anaerobic water distribution pipe structure for sewage treatment, which adds an inspection port to facilitate scale removal and equipment maintenance; and adopts a ring-shaped water distribution method to improve the uniformity of water distribution; thereby solving the technical problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A novel anaerobic water distribution pipe structure for sewage treatment includes a main pipe, which is rectangular and connected end to end. Several flexible pipes are connected to both sides of the main pipe, and the lower ends of the flexible pipes extend into the water distribution pipe.

[0010] The water distribution pipe is welded to the anaerobic tank; a butterfly valve is also connected in series at the connection between the flexible pipe and the main pipe.

[0011] As a further technical solution of this utility model, the anaerobic tank is provided with multiple inspection ports above it, and each inspection port is provided with an inspection cover.

[0012] As a further technical solution of this utility model, the anaerobic tank is also provided with a guardrail around its perimeter.

[0013] As a further technical solution of this utility model, the main pipeline is fixed to the support by a U-shaped hoop; multiple supports are provided, all of which are welded to the anaerobic tank.

[0014] As a further technical solution of this utility model, the main pipeline is arranged in multiple sections and is connected and fixed to each other by flexible flange joints.

[0015] As a further technical solution of this utility model, one end of the main pipeline is connected to the outlet of the anaerobic circulation pump through a flange, and a main valve is installed at the end of the main pipeline near the outlet of the anaerobic circulation pump.

[0016] As a further technical solution of this utility model, two shut-off valves are installed at the T-shaped connection of the main pipeline.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In this invention, the main pipeline is rectangular in shape, but the water flow inside is circular. The single-point flow rate and flow velocity of the circular water distribution are relatively small, resulting in a significantly less impact on the sludge layer at the bottom of the tank compared to the centralized water distribution. This helps maintain the stability of the sludge bed (such as the granular sludge layer in a UASB reactor), reduces sludge loss or floating, and ensures the activity and population balance of anaerobic microorganisms.

[0019] 2. With this invention, when one shut-off valve is opened, water can flow from one side to the other for water distribution; when two shut-off valves are opened, water can flow from both sides to the inner end simultaneously, thereby achieving the effect of rapid and uniform water distribution.

[0020] 3. This invention, by uniformly distributing water, avoids the risk of acidification (such as the accumulation of volatile fatty acids) caused by a sudden increase in local organic matter concentration, maintains the stability of pH and oxidation-reduction potential (ORP) in the anaerobic environment, promotes the metabolic activity of methanogenic bacteria, and improves biogas production and quality.

[0021] 4. This utility model features a ring structure, which makes the main pipe and branch pipes less prone to blockage and can maintain a stable circulation flow for a longer period of time. The main pipe sections and branch pipes are made of PE flexible pipes, which makes it easier to maintain and dredge during production and operation, while shortening the maintenance cycle and reducing system maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the existing water distribution structure.

[0023] Figure 2 This is a schematic diagram of the planar structure of this utility model.

[0024] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 4 This utility model Figure 2 Another perspective illustration.

[0026] Figure 5 This utility model Figure 4 Top view.

[0027] Figure 6 This utility model Figure 4 A magnified view of a portion of the image.

[0028] In the diagram: 1-Anaerobic tank, 2-Water distribution pipe, 3-Flexible pipe, 4-Main pipeline, 5-Stop valve, 6-Flexible flange joint, 7-Guardrail, 8-Inspection port, 9-Support, 10-Butterfly valve, 11-Main valve. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-6 In this embodiment of the utility model, a novel anaerobic water distribution pipe structure for sewage treatment includes a main pipe 4, which is rectangular and connected end to end. Several flexible pipes 3 are connected on both sides of the main pipe 4, and the lower end of the flexible pipes 3 extends into the water distribution pipe 2.

[0031] By adopting the above technical solution, the main pipeline 4 is arranged in a rectangular shape, but the water flow inside is circular. The single-point flow rate of the circular water distribution is small, and the water flow velocity is low, so the impact on the sludge layer at the bottom of the tank is significantly less than that of the centrally concentrated water distribution. This helps to maintain the stability of the sludge bed (such as the granular sludge layer in a UASB reactor), reduce sludge loss or floating, and ensure the activity and population balance of anaerobic microorganisms.

[0032] The annular water distribution pipes are arranged circumferentially or radially along the anaerobic tank. The wastewater is dispersed to different areas of the tank through evenly distributed water distribution outlets (such as branch pipes, nozzles or water distribution holes), avoiding the problems of strong local water flow impact, large sludge layer disturbance or excessive regional load caused by traditional single-point water distribution.

[0033] The water distribution pipe 2 is welded to the anaerobic tank 1; a butterfly valve 10 is also connected in series at the connection between the flexible pipe 3 and the main pipe 4.

[0034] In this embodiment, the flexible pipe 3 and the butterfly valve 10 are independent pipe modules. If the water distribution pipe 2 in a certain area is blocked or damaged, the butterfly valve 10 of that module can be closed separately for cleaning or repair without affecting the normal operation of other areas, thus reducing downtime and maintenance costs.

[0035] In this embodiment, the anaerobic tank 1 is provided with multiple inspection ports 8 above it, and each inspection port 8 is provided with an inspection cover plate.

[0036] By adopting the above technical solution, it is convenient for staff to enter the anaerobic tank 1 to clean up blockages, damage, or scale buildup, effectively ensuring the stable operation of the equipment.

[0037] In this embodiment, the anaerobic tank 1 is also equipped with guardrails 7 around its perimeter for protection during equipment maintenance.

[0038] In this embodiment, the main pipe 4 is fixed to the support 9 by a U-shaped clamp; multiple supports 9 are provided, all of which are welded to the anaerobic tank 1.

[0039] The U-shaped clamp has a good clamping effect on the main pipe 4. It has a simple structure, is convenient for fixing the main pipe, and is easy to disassemble and assemble during maintenance.

[0040] In this embodiment, the main pipeline 4 is arranged in multiple sections and is connected and fixed to each other by flexible flange joints 6.

[0041] The flexible flange joint 6 allows for slight adjustments between multiple sections of the main pipeline 4 to meet installation requirements.

[0042] In this embodiment, one end of the main pipeline 4 is connected to the outlet of the anaerobic circulation pump via a flange, and a main valve 11 is installed at the end of the main pipeline 4 near the outlet of the anaerobic circulation pump; two shut-off valves 5 are installed at the T-shaped connection of the main pipeline 4.

[0043] By adopting the above technical solution, when one shut-off valve 5 is opened, water can flow from one side to the other for water distribution; when two shut-off valves 5 are opened, water can flow from both sides to the inner end at the same time, thereby achieving the effect of rapid and uniform water distribution.

[0044] Even water distribution ensures that wastewater and anaerobic sludge (such as granular sludge or flocculent sludge) at the bottom of the tank are in full contact, ensuring that microorganisms in each area can obtain stable substrates (organic matter and nutrients), thereby improving the overall reaction efficiency.

[0045] Even water distribution can reduce the "dead volume" formed at the bottom or corners of the pool due to insufficient water flow, prevent organic matter or sludge from accumulating and decaying there, and reduce the risk of fluctuations in gas production efficiency.

[0046] Uniform water distribution avoids the risk of acidification (such as the accumulation of volatile fatty acids) caused by a sudden increase in local organic matter concentration, maintains the stability of pH and redox potential (ORP) in the anaerobic environment, promotes the metabolic activity of methanogens, and improves biogas production and quality.

[0047] The working principle of this invention is as follows: the main pipe 4 is rectangular in shape, but the water flow inside is circular. The single-point flow rate of the circular water distribution is small, and the water flow velocity is low, so the impact on the sludge layer at the bottom of the tank is significantly less than that of the centrally concentrated water distribution. This helps to maintain the stability of the sludge bed (such as the granular sludge layer in a UASB reactor), reduce sludge loss or floating, and ensure the activity and population balance of anaerobic microorganisms.

[0048] When one shut-off valve 5 is opened, water can flow from one side to the other for distribution; when both shut-off valves 5 are opened, water can flow from both sides to the inner end simultaneously, thus achieving the effect of rapid and uniform water distribution.

[0049] Even water distribution ensures that wastewater and anaerobic sludge (such as granular sludge or flocculent sludge) at the bottom of the tank are in full contact, ensuring that microorganisms in each area can obtain stable substrates (organic matter and nutrients), thereby improving the overall reaction efficiency.

[0050] Even water distribution can reduce the "dead volume" formed at the bottom or corners of the pool due to insufficient water flow, prevent organic matter or sludge from accumulating and decaying there, and reduce the risk of fluctuations in gas production efficiency.

[0051] Uniform water distribution avoids the risk of acidification (such as the accumulation of volatile fatty acids) caused by a sudden increase in local organic matter concentration, maintains the stability of pH and redox potential (ORP) in the anaerobic environment, promotes the metabolic activity of methanogens, and improves biogas production and quality.

[0052] 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.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel structure of an anaerobic water distribution pipe for sewage treatment, characterized by: Includes a main pipe (4), which is rectangular and connected end to end. Several flexible pipes (3) are connected on both sides of the main pipe (4), and the lower end of the flexible pipes (3) extends into the water distribution pipe (2). The water distribution pipe (2) is welded to the anaerobic tank (1); a butterfly valve (10) is also connected in series at the connection between the flexible pipe (3) and the main pipe (4).

2. The novel anaerobic water distribution pipe structure for sewage treatment according to claim 1, characterized in that: The anaerobic tank (1) is provided with multiple inspection ports (8) above it, and each inspection port (8) is provided with an inspection cover.

3. The novel anaerobic water distribution pipe structure for sewage treatment according to claim 1, characterized in that: The anaerobic pool (1) is also surrounded by guardrails (7).

4. The novel anaerobic water distribution pipe structure for sewage treatment according to claim 1, characterized in that: The main pipeline (4) is fixed to the support (9) by a U-shaped hoop; there are multiple supports (9), all of which are welded to the anaerobic tank (1).

5. The novel anaerobic water distribution pipe structure for sewage treatment according to claim 1, characterized in that: The main pipeline (4) is arranged in multiple sections and is connected and fixed to each other by flexible flange joints (6).

6. The novel anaerobic water distribution pipe structure for sewage treatment according to claim 1, characterized in that: One end of the main pipeline (4) is connected to the outlet of the anaerobic circulation pump via a flange, and a main valve (11) is installed at the end of the main pipeline (4) near the outlet of the anaerobic circulation pump.

7. The novel anaerobic water distribution pipe structure for sewage treatment according to claim 5, characterized in that: Two shut-off valves (5) are installed at the T-shaped connection of the main pipeline (4).

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