Anaerobic ammonia oxidation device

Abstract

The utility model relates to the technical field of sewage treatment equipment, in particular to an anaerobic ammonia oxidation device, and aims to improve the wastewater treatment efficiency, reduce the occupied space and enhance the operation stability. The device adopts a vertical flow structure to distribute a plurality of independent reaction cavities, avoids short circuit of water flow, provides an optimal environment for anaerobic ammonia oxidation, and promotes growth and reproduction of microorganisms. An aeration disc and a stirring device are arranged at the bottom of each reaction cavity, and the aeration disc controls oxygen supply through a one-way valve and supports the nitrosation process without affecting the activity of anaerobic ammonium oxidation bacteria; wastewater enters from a water inlet of the top layer cavity, is treated layer by layer and is discharged from an overflow water outlet of the bottom layer cavity; the top layer cavity is provided with a gas outlet and a gas collecting port and is used for discharging waste gas including nitrogen; and the middle-layer cavity and the bottom-layer cavity are provided with a backflow port and an exhaust port and are connected to a gas collecting system. According to the whole design, the space utilization is optimized, and the ammonia nitrogen removal rate is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment and anaerobic ammonia oxidation reaction equipment, specifically to an anaerobic ammonia oxidation device. Background Technology

[0002] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model, and is not necessarily to be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Anaerobic ammonia oxidation units are used for nitrogen removal in wastewater treatment. The anaerobic ammonia oxidation reaction is carried out by a type of microorganism called anaerobic ammonia-oxidizing bacteria, which are able to break down ammonia nitrogen (NH4+). + ) and nitrite nitrogen (NO2) - It is directly converted into nitrogen (N2), unlike the traditional nitrification-denitrification process, which does not require the participation of oxygen.

[0004] Traditional anaerobic ammonia oxidation devices are mostly designed using horizontal flow or complete mixing modes. While this structure achieves ammonia nitrogen removal to some extent, it has revealed some shortcomings in practical applications, such as biomass loss, water flow short-circuiting, and low treatment efficiency.

[0005] Existing technologies have also made improvements to address the above problems. For example, Chinese invention patent CN 113060825 B discloses an anaerobic ammonia oxidation reactor, including a tank and a degassing hood. The degassing hood is inverted and installed in the middle of the tank. An anaerobic ammonia oxidation reaction device is located above the degassing hood, and a nitrification reaction device is located below the degassing hood. The anaerobic ammonia oxidation reaction device and the nitrification reaction device have the same structure, including a fixed frame, a movable frame, and a limiting groove. The fixed frame and the limiting groove are fixedly connected to the inner wall of the tank. The movable frame can slide up and down within the limiting groove. Packing material is provided between the fixed frame and the movable frame. Wastewater moves from the bottom to the top, undergoing nitrification and anaerobic ammonia oxidation reactions sequentially. In this patent, because the wastewater is input through a water distribution pipe and flows counterclockwise from the bottom to the top, a strong water distribution force is required, and the treatment efficiency is low.

[0006] With the increasing standards for wastewater treatment, higher requirements are being placed on anaerobic ammonia oxidation devices, including higher treatment efficiency, smaller footprint, and more stable operation. Therefore, it is necessary to research an anaerobic ammonia oxidation device that offers higher treatment efficiency, smaller footprint, and more stable operation. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model provides an anaerobic ammonia oxidation device, which aims to solve the problems of low processing efficiency, large space occupation, low utilization rate of additives, and poor stability of traditional anaerobic ammonia oxidation devices.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An anaerobic ammonia oxidation device includes multiple independent reaction chambers arranged in a vertical flow structure. Each reaction chamber includes a top chamber, a bottom chamber, and multiple intermediate chambers located between the top and bottom chambers. The top chamber is equipped with an air outlet, a water inlet, and an air collection port. Each reaction chamber has a corresponding aeration disc and a stirring device at its bottom. The aeration discs are connected to aeration pipes via corresponding aeration branch pipes for precise control of the oxygen supply supporting the nitrification process. The upper reaction chamber is connected to its adjacent lower reaction chamber via corresponding overflow pipes. Both the intermediate and bottom chambers have exhaust ports, which are connected to the air collection ports via air collection pipes and corresponding branch pipes. The bottom chamber also has an overflow drain outlet.

[0010] Preferably, the air inlet is located above the overflow port of the top layer cavity.

[0011] Preferably, the middle cavity and the bottom cavity are provided with return ports that are connected to the corresponding overflow pipes.

[0012] Preferably, the overflow pipe is a gantry-shaped bend that connects to the corresponding overflow port and return port.

[0013] Preferably, the shell of the middle cavity is a cylindrical shell that is open at the top and closed at the bottom.

[0014] Preferably, the aeration disc is provided with a plurality of aeration ports equipped with one-way valves.

[0015] Preferably, the reaction chambers are all sealed and connected by a sealing gasket and a threaded assembly; a mounting bracket is provided below the bottom chamber.

[0016] Preferably, all the stirring devices are installed via a central shaft and corresponding bearings, and the central shaft is driven to rotate by a stirring drive device.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In this utility model, the vertically arranged reaction chambers can make more efficient use of available space, thereby allowing more treatment capacity to be installed in the same space; and, by arranging multiple independent reaction chambers through a vertical flow structure, wastewater can be treated more fully in each reaction chamber without water flow short-circuiting, which helps to improve the overall ammonia nitrogen removal rate.

[0019] 2. In this invention, the independent reaction chamber provides an optimal environment for anaerobic ammonia oxidation, promoting the growth and reproduction of microorganisms and ensuring stable biological activity, which is crucial for maintaining long-term, efficient wastewater treatment. Furthermore, the aeration disc design allows for precise control of the amount of oxygen required to support the nitrification process, avoiding the negative impact of excessive oxygen on anaerobic ammonia oxidizing bacteria and ensuring a balance between the two different processes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram showing the overall disassembled structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the middle cavity.

[0023] In the diagram: 100, top layer cavity; 101, air outlet; 102, water inlet; 103, air collection port; 200, middle layer cavity; 300, bottom layer cavity; 301, overflow drain outlet; 400, mounting bracket; 500, stirring drive device; 501, central shaft; 502, stirring device; 600, overflow pipe; 601, return port; 602, overflow outlet; 700, air collection pipe; 701, exhaust port; 800, aeration pipe; 801, aeration branch pipe; 900, connecting assembly; 901, embedded interface; 1000, aeration disc; 1001, aeration port. Detailed Implementation

[0024] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figures 1 to 3 An anaerobic ammonia oxidation device is presented, comprising multiple independent reaction chambers arranged in a vertical flow structure. Compared with the traditional horizontal flow or fully mixed design, this local approach not only improves space utilization but also effectively prevents water flow short-circuiting. Moreover, it forms a series of independent reaction chambers, each of which provides an optimal environment for anaerobic ammonia oxidation, promoting the growth and reproduction of microorganisms.

[0026] The reaction chamber includes a top chamber 100, a bottom chamber 300, and multiple intermediate chambers 200 located between the top chamber 100 and the bottom chamber 300. Each reaction chamber has a corresponding aeration disc 1000 and a stirring device 502 at its bottom. Each aeration disc 1000 has several aeration ports 1001 equipped with one-way valves. Each aeration disc 1000 is connected to an aeration pipe 800 via a corresponding aeration branch pipe 801 for precise control of the oxygen supply supporting the nitrification process. This precise control aims to support the nitrification process without affecting the activity of anaerobic ammonia oxidizing bacteria. The upper reaction chamber is connected to the adjacent lower reaction chamber via a corresponding overflow pipe 600. The intermediate chambers 200 and the bottom chambers 300... The layer cavity 300 is provided with a return port 601 connected to the corresponding overflow pipe 600. The top layer cavity 100 is provided with an outlet 101 for discharging waste gas including nitrogen. The top layer cavity 100 is provided with a water inlet 102 for wastewater to enter. The bottom layer cavity 300 is also provided with an overflow drain 301 for wastewater to be discharged after being treated layer by layer in the reaction cavity. The top layer cavity 100 is also provided with a gas collection port 103 for collecting nitrogen generated in other reaction cavities into the top layer cavity 100 and discharging it through the top layer cavity 100. Specifically, the middle layer cavity 200 and the bottom layer cavity 300 are both provided with exhaust ports 701, and the exhaust ports 701 are connected to the gas collection port 103 through gas collection pipes 700 and corresponding branch pipes.

[0027] Wastewater first enters the top chamber 100, where the initial ammonia nitrogen conversion is completed; then the wastewater flows sequentially into the middle chambers 200 below, where ammonia nitrogen is further removed each time it passes through a layer until the discharge standard is met, and finally it is discharged through the overflow drain 301 of the bottom chamber 300.

[0028] The stirring devices 502 are all installed with corresponding bearings via a central shaft 501. The central shaft 501 is driven to rotate by the stirring drive device 500. In this way, the stirring devices 502 in each reaction chamber can maintain synchronous linkage, so that the stirring work can be carried out efficiently.

[0029] In order to make nitrogen gas discharge more efficiently, the gas inlet 103 is located above the overflow port 602 of the top chamber 100 to prevent the height of the gas inlet 103 from being lower than the liquid surface.

[0030] The overflow pipe 600 has the following shape and structure: it is a gantry-shaped bend that connects to the corresponding overflow port 602 and return port 601.

[0031] The shell structure of the middle cavity 200 is as follows: it is a cylindrical shell with an open top and a closed bottom. Thus, the middle cavity 200 is formed by the bottom of the shell of the top cavity 100, or the bottom of the shell of the adjacent middle cavity 200 and the shell of the corresponding next layer of middle cavity 200.

[0032] The connecting components 900 between the reaction chambers are as follows: all are sealed together by a sealing gasket and a threaded assembly; a mounting bracket 400 is provided below the bottom chamber 300. Furthermore, the top of the lower reaction chamber is provided with an embedded interface 901 for easy assembly, making the connection between the various reaction chambers more stable.

[0033] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anaerobic ammonia oxidation device, characterized in that: The system comprises multiple independent reaction chambers arranged in a vertical flow structure. Each reaction chamber includes a top chamber, a bottom chamber, and multiple intermediate chambers located between the top and bottom chambers. The top chamber is equipped with an air outlet, a water inlet, and an air collection port. Each reaction chamber has a corresponding aeration disc and a stirring device at its bottom. The aeration discs are connected to the aeration pipe via corresponding aeration branch pipes for precise control of the oxygen supply supporting the nitrification process. The upper reaction chamber is connected to the adjacent lower reaction chamber via corresponding overflow pipes. Both the intermediate and bottom chambers have exhaust ports, which are connected to the air collection port via air collection pipes and corresponding branch pipes. The bottom chamber also has an overflow drain outlet.

2. The anaerobic ammonia oxidation device as described in claim 1, characterized in that: The gas inlet is located above the overflow port of the top chamber.

3. The anaerobic ammonia oxidation device as described in claim 1, characterized in that: The middle and bottom chambers are provided with return ports that are connected to the corresponding overflow pipes.

4. The anaerobic ammonia oxidation device as described in claim 3, characterized in that: The overflow pipe is a gantry-shaped bend that connects to the corresponding overflow port and return port.

5. The anaerobic ammonia oxidation device as described in claim 1, characterized in that: The shell of the middle cavity is a cylindrical shell that is open at the top and closed at the bottom.

6. The anaerobic ammonia oxidation device as described in claim 1, characterized in that: The aeration disc is equipped with several aeration ports, each equipped with a one-way valve.

7. The anaerobic ammonia oxidation device as described in claim 1, characterized in that: The reaction chambers are all sealed and connected by a sealing gasket and a threaded assembly; a mounting bracket is provided below the bottom chamber.

8. The anaerobic ammonia oxidation apparatus according to any one of claims 1 to 7, characterized in that: The stirring devices are all installed via a central shaft and corresponding bearings, and the central shaft is driven to rotate by a stirring drive device.

Images