Uniform water distribution device of efficient anaerobic ammonia oxidation reactor

Abstract

The utility model relates to a sewage treatment device, and provides a uniform water distribution device of a high-efficiency anaerobic ammonia oxidation reactor, which comprises a reactor body, a water inlet pipe and a water distribution system. The water distribution system is composed of a short water distribution pipe, a long water distribution pipe and a vertical water distribution pipe, and full contact of sewage and granular sludge in the reactor is achieved. And the short water distribution pipes and the long water distribution pipes are arranged in the reactor, are communicated with the water inlet pipe, and are uniformly distributed in the reactor in a radial manner, and the number of the short water distribution pipes and the long water distribution pipes is 6-12. The vertical water distribution pipes are vertically arranged in the reactor, are communicated with the radial water distribution pipes and are uniformly distributed. And the short water distribution pipes and the long water distribution pipes are arranged at intervals. The volume conversion efficiency of the reactor is improved by optimizing the number of the water distribution pipes and the spatial arrangement mode, and the reactor can bear high-concentration inflow water. The problems of non-uniform water distribution, dead zone formation, sludge loss and the like in a traditional anaerobic ammonia oxidation reactor are solved, and a new technical scheme is provided for improving the performance of the anaerobic ammonia oxidation reactor.

Description

Technical Field

[0001] This utility model relates to wastewater treatment devices, specifically providing a uniform water distribution device for a high-efficiency anaerobic ammonia oxidation reactor. Background Technology

[0002] Nitrogen removal from urban wastewater mainly relies on biological denitrification processes. Traditional biological denitrification technologies mainly depend on nitrification and denitrification processes, which convert ammonia nitrogen into nitrite and nitrate, and then into nitrogen gas to achieve denitrification. However, this process has drawbacks such as high energy consumption and operating costs, long process flow, large sludge production, and sensitivity to environmental conditions.

[0003] Anaerobic ammonia oxidation (AAO) is a novel biological nitrogen removal technology with advantages such as low energy consumption, no need for external organic carbon sources, and low sludge production, making it a promising technology for wastewater treatment. In the AAO reactor, granular sludge is the key functional microbial carrier, and its performance directly affects the reactor's treatment efficiency.

[0004] Currently, granular sludge anaerobic ammonia oxidation reactors generally suffer from the following problems:

[0005] 1) Due to the high density of anaerobic ammonia oxidation granular sludge, traditional water distribution devices are unable to ensure that the granular sludge is in a fully expanded state, which affects the contact effect between sewage and granular sludge.

[0006] 2) Dead zones are easily formed inside the reactor, leading to a decrease in the activity of granular sludge in some areas;

[0007] 3) Granular sludge has poor fluidization performance and is prone to sludge loss;

[0008] 4) The reactor has low volumetric conversion efficiency and cannot withstand high concentrations of influent.

[0009] Therefore, there is an urgent need to develop a new type of water distribution device to solve the above problems and improve the performance of anaerobic ammonia oxidation reactors. Summary of the Invention

[0010] To address the shortcomings of existing technologies, this invention provides a uniform water distribution device for a high-efficiency anaerobic ammonia oxidation reactor. By optimizing the number and spatial arrangement of water distribution pipes, it achieves full contact between wastewater and granular sludge in the reactor, enhances the mass transfer process, eliminates dead zones, improves sludge fluidization performance, and enhances the reactor's operational stability and volumetric conversion efficiency.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A high-efficiency anaerobic ammonia oxidation reactor uniform water distribution device, comprising a reactor body, an inlet pipe, and a water distribution system, characterized in that:

[0013] The water distribution system includes short water distribution pipes, long water distribution pipes, and vertical water distribution pipes, wherein:

[0014] 1) Short and long water distribution pipes are installed at the bottom of the reactor and connected to the inlet pipe;

[0015] 2) Short and long water distribution pipes are evenly distributed radially inside the reactor and connected to the inlet pipe. The number of radial water distribution pipes is 6-12.

[0016] 3) Vertical water distribution pipes are installed inside the reactor and connected to radial water distribution pipes. The water distribution pipes extend downwards and are evenly distributed.

[0017] Furthermore, the radial water distribution pipes include short water distribution pipes and long water distribution pipes, which are spaced apart.

[0018] Furthermore, the number of long water distribution pipes is 2-4, and the number of short water distribution pipes is 1-2.

[0019] Furthermore, the number of radial water distribution pipes is equal to that of vertical water distribution pipes, 6-12 in total.

[0020] Furthermore, the main water distribution pipe, radial water distribution pipe, and vertical water distribution pipe are all made of corrosion-resistant materials, such as stainless steel, PVC, or HDPE.

[0021] Furthermore, the reactor body is cylindrical or square, with a height-to-diameter ratio of 3:5.

[0022] The beneficial effects of this utility model are:

[0023] 1) By increasing the number of water distribution pipes and optimizing the spatial arrangement, full contact between wastewater and granular sludge in the reactor was achieved, thus enhancing the mass transfer process.

[0024] 2) The installation of radial and vertical water distribution pipes eliminates dead zones within the reactor and improves the effective volume utilization rate of the reactor.

[0025] 3) The optimized water distribution system improves the fluidization performance of granular sludge, reduces sludge loss, and enhances the operational stability of the reactor.

[0026] 4) The design of multiple water distribution pipes reduces the risk of blockage and extends the service life of the water distribution system.

[0027] 5) The reactor has excellent anaerobic ammonia oxidation performance, can withstand high influent ammonia nitrogen and nitrite concentrations, and has high volumetric conversion efficiency. Attached Figure Description

[0028] Figure 1 This is a top view of the water distribution system of this utility model;

[0029] Figure 2 This is a side view of the water distribution system of this utility model.

[0030] In the diagram: 1. Inlet pipe; 2. Long water distribution pipe; 3. Short water distribution pipe; 4. Reactor body; 5. Vertical water distribution pipe; 6. Radial water distribution pipe; 7. Water distribution system. Detailed Implementation

[0031] 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.

[0032] like Figure 1-2 As shown, the present invention provides a uniform water distribution device for a high-efficiency anaerobic ammonia oxidation reactor, comprising an inlet pipe 1, a long water distribution pipe 2, a short water distribution pipe 3, a reactor body 4, a vertical water distribution pipe 5, a radial water distribution pipe 6, and a water distribution system 7.

[0033] The reactor body 4 is cylindrical, with a diameter of 0.5-1.5m and a height of 2-6m, resulting in a height-to-diameter ratio of 4. The reactor body 1 is externally covered with a 50mm thick polyurethane insulation layer to maintain a stable internal temperature. The reactor body 4 contains temperature sensors, pH sensors, DO sensors, and ORP sensors for real-time monitoring of internal environmental parameters.

[0034] The inlet pipe 1 is connected to the long water distribution pipe 2 and the short water distribution pipe 3, and is used to transport the sewage to be treated to the water distribution system.

[0035] The water distribution system 7 includes a long water distribution pipe 2, a short water distribution pipe 3, and a vertical water distribution pipe 5. The long water distribution pipe 2 and the short water distribution pipe 3 are located inside the reactor and are connected to the vertical water distribution pipe 5.

[0036] Long water distribution pipe 2 and short water distribution pipe 3 are evenly distributed radially at intervals at the bottom of the reactor and are connected to water inlet pipe 1.

[0037] Vertical water distribution pipes 5 are installed inside the reactor, connected to long water distribution pipes 2 and short water distribution pipes 3, with their outlets facing downwards and evenly distributed along the reactor. In this embodiment, there are 12 vertical water distribution pipes 5.

[0038] The long water distribution pipe 2, the short water distribution pipe 3, and the vertical water distribution pipe 5 are also made of 316L stainless steel with a diameter of 20mm.

[0039] The working principle of this utility model is as follows:

[0040] The wastewater to be treated enters through inlet pipe 1 into long distribution pipe 2 and short distribution pipe 3, forming a radial distribution pipe 6. This radial distribution pipe 6 then connects with the vertical distribution pipe 5, distributing the wastewater evenly throughout the reactor. The wastewater is ejected from the outlet, making full contact with the anaerobic ammonia oxidation granular sludge inside the reactor for biological denitrification. The treated effluent is discharged through an overflow weir and an outlet pipe.

[0041] This invention's water distribution system, by increasing the number of water distribution pipes and optimizing their spatial arrangement, achieves full contact between wastewater and granular sludge within the reactor, thus enhancing the mass transfer process. The radial distribution of long and short water distribution pipes 2 and the placement of vertical water distribution pipes 5 eliminate dead zones within the reactor, improving the effective volume utilization rate. The optimized water distribution system improves the fluidization performance of the granular sludge, reduces sludge loss, enhances the reactor's operational stability, reduces the risk of clogging, and extends the service life of the water distribution system.

[0042] This invention relates to a high-efficiency anaerobic ammonia oxidation reactor with a uniform water distribution device. This device is suitable not only for treating high-concentration ammonia nitrogen wastewater but also for treating low-concentration ammonia nitrogen wastewater and ammonia nitrogen wastewater containing organic matter, demonstrating broad application prospects. By optimizing the number and spatial arrangement of the water distribution pipes, this invention achieves the following technical effects: 1) Enhanced mass transfer and improved reaction efficiency; 2) Elimination of dead zones within the reactor, increasing effective volume utilization; 3) Improved fluidization performance of granular sludge, reducing sludge loss; 4) Improved reactor operational stability; 5) Reduced risk of blockage in the water distribution system, extending its service life; 6) Increased volumetric conversion efficiency of the reactor, enabling it to withstand high-concentration influent. This invention solves the problems of uneven water distribution, dead zone formation, and sludge loss inherent in traditional anaerobic ammonia oxidation reactors, providing a new technical solution for improving the performance of anaerobic ammonia oxidation reactors.

[0043] The working principle and structure of this utility model are not limited to the above embodiments. Equivalent substitutions or modifications made by those skilled in the art based on this utility model all fall within the protection scope of this utility model. For example, the number, spacing, and diameter of the radial and vertical water distribution pipes can be adjusted according to actual needs; other corrosion-resistant materials can be used to make the water distribution system; packing material can be added inside the reactor to improve the adhesion of the biofilm, etc. These changes and modifications will not alter the essence of this utility model and should all be included within the protection scope of this utility model.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A uniform water distribution device for a high-efficiency anaerobic ammonia oxidation reactor, comprising a reactor body (4), an inlet pipe (1), and a water distribution system (7), characterized in that... : The water distribution system includes a long water distribution pipe (2), a short water distribution pipe (3), and a vertical water distribution pipe (5), wherein: The long water distribution pipe (2) and the short water distribution pipe (3) are set at the bottom of the reactor and connected to the water inlet pipe; The long water distribution pipe (2) and the short water distribution pipe (3) are evenly distributed radially inside the reactor and are connected to the water inlet pipe (1). The number of radial water distribution pipes (6) is 6-12. The vertical water distribution pipe (5) is set vertically inside the reactor and connected to the radial water distribution pipe. The water distribution pipe extends downward and is evenly distributed.

2. The uniform water distribution device for the high-efficiency anaerobic ammonia oxidation reactor according to claim 1, characterized in that... The radial water distribution pipes include long water distribution pipes (2) and short water distribution pipes (3), which are spaced apart from each other.

3. The uniform water distribution device for the high-efficiency anaerobic ammonia oxidation reactor according to claim 1, characterized in that... The number of long water distribution pipes (2) is 2-4, and the number of short water distribution pipes (3) is 1-2.

4. The uniform water distribution device for the high-efficiency anaerobic ammonia oxidation reactor according to claim 1, characterized in that... The number of vertical water distribution pipes (5) and radial water distribution pipes (6) is equal, 6-12 in total.

5. The uniform water distribution device for the high-efficiency anaerobic ammonia oxidation reactor according to claim 1, characterized in that... The long water distribution pipe (2), the short water distribution pipe (3) and the vertical water distribution pipe (5) are all made of corrosion-resistant materials.

6. The uniform water distribution device for the high-efficiency anaerobic ammonia oxidation reactor according to claim 1, characterized in that... The reactor body (4) is cylindrical or square, with a height-to-diameter ratio of 3:5.

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