Nitrification liquid backflow device for integrated sewage treatment equipment

Abstract

The utility model discloses a nitrification liquid reflux device for integrated sewage treatment equipment, and relates to the technical field of sewage treatment equipment. The device comprises an anaerobic tank and a reflux tank, an anoxic tank is arranged on one side of the anaerobic tank, an aerobic tank is arranged on one side of the anoxic tank, a sedimentation tank is arranged on one side of the aerobic tank, and an equipment room is arranged on one side of the sedimentation tank. According to the utility model, the nitrification liquid reflux device is arranged to be a chute type channel, and dissolved oxygen in the nitrification liquid can be released in the nitrification liquid reflux process, so that the dissolved oxygen concentration of the mixed liquid in the anoxic tank is reduced, and the dissolved oxygen concentration of the mixed liquid in the anoxic tank is kept between 0.2 mg / L and 0.5 mg / L, which is more beneficial to denitrification; by increasing the contact area between the nitrification liquid and air in the backflow process and simultaneously enabling dissolved oxygen to quickly escape into the air in the flowing process of the nitrification liquid, the concentration of the dissolved oxygen in the backflow nitrification liquid can be greatly reduced, so that the denitrification effect is better, and the total nitrogen of effluent can stably reach the standard.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment equipment, and particularly relates to a nitrification liquid reflux device used for integrated sewage treatment equipment. Background Art

[0002] The existing nitrification liquid reflux device is to lift the nitrification liquid into a sealed pipe through a submersible pump or an air lift device in the aerobic pool, and then return it to the anoxic pool. This technology and the present invention both use a submersible pump or an air lift device to lift the nitrification liquid and then return it to the anoxic pool through a reflux pipe (device). The disadvantage of the prior art is that a large amount of dissolved oxygen in the nitrification liquid is returned to the anoxic pool, making the dissolved oxygen concentration in the anoxic pool greater than 0.5 mg / L, destroying the anoxic environment, thereby reducing the denitrification effect of the anoxic pool, resulting in excessive total nitrogen in the effluent.

[0003] In view of the shortcomings of the prior art, a nitrification liquid reflux device is proposed, which releases dissolved oxygen in the nitrification liquid into the air during the reflux process to avoid it being brought into the anoxic pool. Utility Model Content

[0004] The purpose of the utility model is to provide a nitrification liquid reflux device for integrated sewage treatment equipment to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a nitrification liquid reflux device for integrated sewage treatment equipment, comprising an anaerobic tank and a reflux trough, wherein an anoxic tank is arranged on one side of the anaerobic tank, an aerobic tank is arranged on one side of the anoxic tank, a sedimentation tank is arranged on one side of the aerobic tank, an equipment room is arranged on one side of the sedimentation tank, the reflux trough is arranged between the anaerobic tank, the anoxic tank and the aerobic tank, gas lift joints are arranged on both sides of the bottom surface of the reflux trough, one group of the gas lift joints is arranged in the anoxic tank, and the other group of the gas lift joints is arranged in the aerobic tank, and a water outlet is arranged on one side of the bottom surface of the reflux trough, and the water outlet is arranged in the anoxic tank.

[0007] The reflow trough is connected from the end of the aerobic tank to the beginning of the anaerobic tank and is in an inclined state, with the end of the aerobic tank as the starting point and the beginning of the anaerobic tank as the end point, and the height difference between the starting point and the end point is 50 mm; in the above structure, the end of the aerobic tank is the starting point and is located at the highest position, the beginning of the anaerobic tank is the end point and is located at the lowest position, and the height difference between the starting point and the end point is 50 mm, and a partition is provided on one side of the inside of the reflow trough, and the partition is provided between the anoxic tank and the anaerobic tank.

[0008] One end of the gas lift joint is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to a three-way joint, one end of the three-way joint is fixedly connected to a filter, and the other end is fixedly connected to a reducer, one end of the reducer is fixedly connected to an air supply pipeline, and one end of the air supply pipeline is fixedly connected to an aeration main pipe.

[0009] Water passing tanks are arranged on both sides of the aerobic pool, and the water passing tanks are arranged below the reflux tank.

[0010] A water-passing orifice plate is arranged between the inner bottom of the aerobic tank and the sedimentation tank.

[0011] The utility model has the following beneficial effects:

[0012] The utility model sets the nitrification liquid reflux device as a flow channel, and can release the dissolved oxygen in the nitrification liquid during the reflux process of the nitrification liquid, thereby reducing the dissolved oxygen concentration of the mixed liquid in the anoxic pool, so that the dissolved oxygen concentration of the mixed liquid in the anoxic pool is maintained between 0.2-0.5 mg / L, which is more conducive to denitrification; by increasing the contact area between the nitrification liquid and the air during the reflux process, the dissolved oxygen can quickly escape into the air during the flow of the nitrification liquid, and the dissolved oxygen concentration in the refluxed nitrification liquid can be greatly reduced, so that the denitrification effect is better, and the total nitrogen in the effluent can stably meet the standard.

[0013] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the internal section of the structure of the utility model;

[0016] Figure 2 for Figure 1 Magnified view of area A.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Anaerobic tank; 2. Anoxic tank; 3. Aerobic tank; 301. Water tank; 302. Connecting pipe; 303. Tee joint; 304. Reducer; 305. Filter; 306. Air supply pipeline; 4. Sedimentation tank; 401. Water orifice plate; 5. Equipment room; 6. Air lift joint; 7. Reflux tank; 71. Water outlet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-Figure 2 As shown, the utility model is a nitrification liquid reflux device for an integrated sewage treatment device, comprising an anaerobic tank 1 and a reflow trough 7, an anoxic tank 2 is arranged on one side of the anaerobic tank 1, an aerobic tank 3 is arranged on one side of the anoxic tank 2, a sedimentation tank 4 is arranged on one side of the aerobic tank 3, an equipment room 5 is arranged on one side of the sedimentation tank 4, the reflow trough 7 is arranged between the anaerobic tank 1, the anoxic tank 2 and the aerobic tank 3, gas lift joints 6 are arranged on both sides of the bottom surface of the reflow trough 7, one group of gas lift joints 6 is arranged in the anoxic tank 2, and the other group of gas lift joints 6 is arranged in the aerobic tank 3, and a water outlet 71 is arranged on one side of the bottom surface of the reflow trough 7, and the water outlet 71 is arranged in the anoxic tank 2.

[0023] The reflow trough 7 is connected from the end of the aerobic tank 3 to the beginning of the anaerobic tank 1 and is in an inclined state. The end of the aerobic tank 3 is the starting point, and the beginning of the anaerobic tank 1 is the end point. The height difference between the starting point and the end point is 50 mm. In the above structure, the end of the aerobic tank 3 is the starting point and is located at the highest position, and the beginning of the anaerobic tank 1 is the end point and is located at the lowest position. The height difference between the starting point and the end point is 50 mm. A partition is provided on one side of the inside of the reflow trough 7, and the partition is provided between the anoxic tank 2 and the anaerobic tank 1.

[0024] One end of the air lift connector 6 is fixedly connected to a connecting pipe 302, one end of the connecting pipe 302 is fixedly connected to a three-way connector 303, one end of the three-way connector 303 is fixedly connected to a filter 305, and the other end is fixedly connected to a reducer 304, one end of the reducer 304 is fixedly connected to an air supply pipe 306, and one end of the air supply pipe 306 is fixedly connected to an aeration main pipe.

[0025] Water passing tanks 301 are provided on both sides of the interior of the aerobic pool 3 , and the water passing tanks 301 are provided below the reflux tank 7 .

[0026] A water-passing orifice plate 401 is provided between the inner bottom of the aerobic tank 3 and the sedimentation tank 4 .

[0027] It should be supplemented that the outlet of the air lift joint 6 of the aerobic tank 3 is connected to the starting end of the nitrification liquid reflux tank 7 through the connecting pipe 302 and the air supply pipe 306. The reflux tank 7 is connected from the end of the aerobic tank 3 to the starting end of the anoxic tank 2 and is in an inclined state. The end of the aerobic tank 3 is the starting point, which is located at the highest position, and the starting end of the anaerobic tank 1 is the end point, which is located at the lowest position. The height difference between the starting point and the end point is 50 mm. After the nitrification liquid is lifted into the reflux tank 7, the nitrification liquid is refluxed along the slope of the reflux tank 7. The nitrifying liquid flows back from the aerobic tank 3 to the anoxic tank 2, and a partition is provided in the reflow tank 7 between the anoxic tank 2 and the anaerobic tank 3 to separate them. Then the mixed liquid in the anoxic tank 2 flows back from the air lift joint 6 to the anaerobic tank 1, and flows from the outlet hole 71 of the reflow tank 7 to the anoxic tank 2. During the flow, most of the dissolved oxygen in the nitrifying liquid is released into the air. By increasing the contact area between the nitrifying liquid and the air during the reflow process, the dissolved oxygen can quickly escape into the air during the flow of the nitrifying liquid.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A nitrification liquid reflux device for an integrated sewage treatment plant, comprising an anaerobic tank (1) and a reflux tank (7), characterized in that: An anoxic tank (2) is arranged on one side of the anaerobic tank (1), an aerobic tank (3) is arranged on one side of the anoxic tank (2), a sedimentation tank (4) is arranged on one side of the aerobic tank (3), an equipment room (5) is arranged on one side of the sedimentation tank (4), the reflow trough (7) is arranged between the anaerobic tank (1), the anoxic tank (2) and the aerobic tank (3), gas lift joints (6) are arranged on both sides of the bottom surface of the reflow trough (7), one group of the gas lift joints (6) is arranged in the anoxic tank (2), and the other group of the gas lift joints (6) is arranged in the aerobic tank (3), and a water outlet (71) is arranged on one side of the bottom surface of the reflow trough (7), and the water outlet (71) is arranged in the anoxic tank (2).

2. The nitrification liquid reflux device for integrated sewage treatment equipment according to claim 1, characterized in that: The reflow trough (7) is connected from the end of the aerobic tank (3) to the beginning of the anaerobic tank (1) and is in an inclined state, with the end of the aerobic tank (3) as the starting point and the beginning of the anaerobic tank (1) as the end point, and the height difference between the starting point and the end point is 50 mm. A partition is provided on one side of the interior of the reflow trough (7), and the partition is provided between the anoxic tank (2) and the anaerobic tank (1).

3. The nitrification liquid reflux device for integrated sewage treatment equipment according to claim 2, characterized in that: One end of the gas lift joint (6) is fixedly connected to a connecting pipe (302), one end of the connecting pipe (302) is fixedly connected to a three-way joint (303), one end of the three-way joint (303) is fixedly connected to a filter (305), and the other end is fixedly connected to a reducer (304), one end of the reducer (304) is fixedly connected to an air supply pipe (306), and one end of the air supply pipe (306) is fixedly connected to an aeration main pipe.

4. The nitrification liquid reflux device for integrated sewage treatment equipment according to claim 3, characterized in that: Water passing boxes (301) are provided on both sides of the interior of the aerobic pool (3), and the water passing boxes (301) are arranged below the reflow tank (7).

5. The nitrification liquid reflux device for integrated sewage treatment equipment according to claim 4, characterized in that: A water-passing orifice plate (401) is provided between the inner bottoms of the aerobic tank (3) and the sedimentation tank (4).

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