Layered mixed anoxic tank

Abstract

The utility model provides a kind of layered mixed type anoxic tank, including pool body, transverse partition, vertical partition, water outlet baffle and submersible mixer;The first end lower part of pool body is equipped with water inlet, and the first section upper part of pool body is equipped with water outlet;Transverse partition is horizontally arranged in the middle height in pool body, and from the first end in pool body to tail end, pool body is separated into two layers of upper and lower;Vertical partition is vertically arranged in the middle in pool body, and from the first end in pool body to tail end, pool body is separated into two sides of left and right;Water outlet baffle is vertically arranged on the rising gap side edge of transverse partition, so that rising gap, first passage gap, water outlet baffle and pool body first end inner wall form an ascending water channel connected with two layers of upper and lower;Second passage gap and pool body tail end inner wall form two circulating water channels of upper and lower;Submersible mixer is installed at water inlet.The utility model can avoid local water circulation dead angle, and improve mixing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment, specifically to a layered mixing anoxic tank. Background Technology

[0002] Anoxic tanks are commonly used as biological nitrogen removal units in the wastewater treatment industry, often as one of the process units in a series of biological processes, such as "anoxic tank + aerobic tank" or "anaerobic tank + anoxic tank + aerobic tank". The main body of the anoxic tank is the tank body itself. To ensure uniform mixing of the mixed liquor (activated sludge + water) within the tank, submersible mixers and other mixing equipment are often used to create a flow field within the anoxic tank, achieving the purpose of uniform mixing.

[0003] like Figure 1 As shown, the arrows indicate the direction of water flow. Due to the influence of the flow field, existing processes in anoxic tanks are prone to localized circulation dead zones during actual operation and management, especially at the inlet and outlet ends. Once a localized dead zone forms, the inlet end directly connects to the outlet end, resulting in a "short-circuit" phenomenon. This means that the wastewater is not completely mixed within the anoxic tank but flows over the surface, reducing treatment efficiency. This phenomenon is more pronounced when the anoxic tank depth is greater than 5 meters. Furthermore, traditional anoxic tanks require at least two submersible mixers to operate simultaneously, significantly increasing energy consumption and wasting energy. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a layered mixing anoxic tank that can avoid local dead zones in water circulation and improve mixing efficiency.

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

[0006] A layered mixing anoxic tank includes a tank body, a horizontal partition, a vertical partition, an outlet baffle, and a submersible mixer. The tank body has an inlet at the lower part of its first end and an outlet at the upper part of its first section. The horizontal partition is horizontally positioned at the middle of the tank body, extending from the first end to the last end, dividing the tank body into upper and lower layers. The first end of the horizontal partition has a rising notch diagonally above the inlet. The vertical partition is vertically positioned in the middle of the tank body, extending from the first end to the last end, dividing the tank body into left and right sides. The first end of the vertical partition has a first channel notch above the horizontal partition, and the last end of the vertical partition has a second channel notch. The outlet baffle is erected on the side of the rising notch of the horizontal partition, forming a rising waterway connecting the upper and lower layers with the rising notch, the first channel notch, the outlet baffle, and the inner wall of the first end of the tank body. The second channel notch and the inner wall of the last end of the tank body form two circulating waterways. The submersible mixer is installed at the inlet.

[0007] Furthermore, a guide plate is also provided; the guide plate is inclined at the head end of the pool body and located at the entrance of the rising water channel.

[0008] This invention relates to a layered mixing anoxic tank, which uses horizontal and vertical partitions to divide the limited space within the tank into narrow, elongated channels, creating a three-dimensional spatial structure that allows for thorough and uniform mixing of the liquid. Combined with a flow guide plate, the water flows smoothly, requiring only a single submersible mixer to operate, making it energy-efficient and environmentally friendly. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the principle of local water circulation and short-circuiting in existing technology.

[0010] Figure 2 This is a schematic diagram of the structure of a layered mixing anoxic pool provided by this utility model.

[0011] Figure 3 This is a schematic diagram of the baffle plate. Detailed Implementation

[0012] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0013] Example 1

[0014] like Figure 2 As shown, this utility model provides a layered mixing anoxic pool, including a pool body 1, a horizontal partition 2, a vertical partition 3, an outlet baffle 4, and a submersible mixer 5; the pool body 1 has an inlet 11 at the lower part of its first end and an outlet 12 at the upper part of its first section; the horizontal partition 2 is horizontally positioned at the middle height of the pool body 1, extending from the first end to the last end of the pool body 1 to divide the pool body 1 into upper and lower layers, and the first end of the horizontal partition 2 is provided with an upward notch 21 diagonally above the inlet 11; the vertical partition 3 is vertically positioned in the middle of the pool body 1, extending from the first end of the pool body 1... The inner end of the vertical partition 3 extends from the front end to the rear end, dividing the pool body 1 into left and right sides. The front end of the vertical partition 3 is located above the horizontal partition 2 and has a first channel notch 31. The rear end of the vertical partition 3 has a second channel notch 32. The water outlet baffle 4 is erected on the side of the rising notch 21 of the horizontal partition 2, so that the rising notch 21, the first channel notch 31, the water outlet baffle 4 and the inner wall of the front end of the pool body 1 form a rising waterway connecting the upper and lower layers. The second channel notch 32 and the inner wall of the rear end of the pool body 1 form two circulating waterways. The submersible mixer 5 is installed at the water inlet 11.

[0015] This invention divides the interior of the pool 1 into a three-dimensional spatial waterway layout by using horizontal partitions 2 and vertical partitions 3, thereby ensuring that the mixed liquid is fully mixed during the flow process and preventing short-circuiting.

[0016] Figure 2 In the diagram, the direction of water flow is indicated by arrows. The water first enters through inlet 11, passes through a narrow channel composed of horizontal baffles 2 and vertical baffles 3, then flows through the lower circulation channel where it changes direction. It then flows through the rising channel into the upper layer, changing direction again and causing the water to flow upwards. It then flows through the upper circulation channel where it changes direction a third time, and finally, guided by the outlet baffle 4, it flows out through outlet 12.

[0017] This simple layout requires only a few boards, has a simple structure, low cost, and achieves at least four water flow deflections.

[0018] like Figure 3 As shown, preferably, a guide plate 6 is also provided; the guide plate 6 is inclinedly disposed at the first end inside the pool body 1, located at the entrance of the rising water channel. When water flows through the rising water channel, it can be guided upward into the upper layer by the guide plate 6.

[0019] This utility model provides a layered mixing anoxic tank, which is equipped with horizontal baffles 2 and vertical baffles 3, transforming the interior of the tank 1 into a three-dimensional spatial water flow layout. This allows the water flow to change direction multiple times, ensuring thorough mixing of the liquid. Only one submersible mixer 5 is needed for water flow drive, making it highly efficient, environmentally friendly, and energy-saving.

[0020] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A stratified mixing anoxic tank, characterized in that: The system includes a pool body, horizontal partitions, vertical partitions, an outlet baffle, and a submersible mixer. The pool body has an inlet at the lower end and an outlet at the upper end. The horizontal partitions are horizontally positioned at the middle of the pool body, extending from the first to the last end, dividing the pool into upper and lower layers. The first end of the horizontal partition has a rising notch diagonally above the inlet. The vertical partitions are vertically positioned in the middle of the pool body, extending from the first to the last end, dividing the pool into left and right sides. The first end of the vertical partition has a first channel notch above the horizontal partition, and the last end has a second channel notch. The outlet baffle is erected on the side of the rising notch of the horizontal partition, forming a rising waterway connecting the upper and lower layers with the rising notch, the first channel notch, the outlet baffle, and the inner wall of the first end of the pool body. The second channel notch and the inner wall of the last end of the pool body form two circulating waterways. The submersible mixer is installed at the inlet.

2. The stratified mixing anoxic tank according to claim 1, characterized in that: It is also equipped with a flow guide plate; the flow guide plate is inclined and located at the head end of the pool body, at the entrance of the rising water channel.

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