Gas distribution device of sewage treatment oxidation tank

Abstract

The utility model relates to a gas distribution device of a sewage treatment oxidation tank, and aims to solve the technical problem that liquid in the oxidation tank is insufficient in reaction. According to the technical scheme, the gas distribution device comprises a gas distribution pipeline, a gas inlet tee joint and a blind plate, the gas distribution pipeline comprises four vertical pipes, two bottom pipes and two U-shaped top pipes, the four vertical pipes and the two bottom pipes are connected to form two vertical U-shaped structures, the upper ends of the two U-shaped structures are connected through the horizontally outward U-shaped top pipes respectively, the vertical pipes, the bottom pipes and the top pipes are communicated, and the blind plate is connected with the gas inlet tee joint. The air inlet tee joint is arranged in the middle of the top pipe, two connectors of the air inlet tee joint are communicated with the top pipe, the other connector of the air inlet tee joint is communicated with the compressed air pipe, the blind plate is arranged in the middle of the other top pipe to block the top pipe, and a plurality of air holes are evenly and symmetrically formed in the two sides of the bottom faces of the two bottom pipes. The air holes are formed in the two sides of the bottom of the air distribution pipeline, and compressed air can impact and roll liquid, so that the liquid is fully contacted with the air to be oxidized, and the defects of mechanical stirring are overcome.

Description

Technical Field

[0001] This utility model belongs to the technical field of wastewater treatment equipment, specifically relating to an aeration device for an oxidation tank in wastewater treatment. Background Technology

[0002] In the treatment of acidic wastewater, the iron salt lime method is commonly used. Gypsum filtrate enters a primary neutralization tank to react with lime slurry. The overflowing filtrate enters an oxidation tank where iron salts are added and react with air for oxidation, thus increasing the Fe content. 2+ Oxidized to Fe 3+ As 3+ Oxidation to As 5+ Then with Ca 2+ and Fe 3+ It produces ferric arsenate and calcium arsenate precipitates.

[0003] In actual production, it is often found that the color of the wastewater thickening tank is green, the recycled water does not meet the standards, the arsenic removal effect of the wastewater process is not good, the amount of iron salt added is large, and the iron salt may not react fully in the oxidation tank. The traditional oxidation tank air distribution pipe is three compressed air pipes that are directly introduced into the liquid in the oxidation tank, which cannot achieve effective and uniform oxidation, and the iron salt cannot react fully. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide an aeration device for a wastewater treatment oxidation tank.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A wastewater treatment oxidation tank aeration device includes an aeration pipe, an inlet tee, and a blind flange. The aeration pipe includes four vertical pipes, two bottom pipes, and two U-shaped top pipes. The four vertical pipes and two bottom pipes are connected to form two vertical U-shaped structures. The upper ends of the two U-shaped structures are respectively connected by horizontally outward U-shaped top pipes, and the vertical pipes, bottom pipes, and top pipes are interconnected. The inlet tee is located in the middle of one top pipe, and two of its ports are connected to the top pipe, while the other port is connected to a compressed air pipe. The blind flange is located in the middle of the other top pipe, sealing it off. Several air holes are evenly and symmetrically opened on both sides of the bottom surface of the two bottom pipes.

[0007] Furthermore, the length of the bottom pipe is less than the width of the oxidation tank, and the distance between two bottom pipes is less than the length of a single oxidation tank but greater than the diameter of the agitator.

[0008] Furthermore, the distance between the intake tee and the blind plate is greater than the width of the oxidation tank.

[0009] Furthermore, the compressed air pipe is equipped with a regulating valve.

[0010] Furthermore, the distance between adjacent air holes is 10cm, and the angle α between the two air holes and the center line of the bottom pipe is 60°.

[0011] Furthermore, the bottom tube and the stirring paddle are located on the same horizontal plane.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The gas distribution pipe of this utility model has air holes on both sides at the bottom. Compressed air can impact and roll the liquid after it is stirred at the bottom, so that the liquid at the bottom can fully contact the air for oxidation, thus making up for the shortcomings of uneven mechanical stirring.

[0014] 2. The gas distribution device of this utility model is designed to fit the oxidation tank and the stirring device, and can be placed on both sides of the stirring. It occupies little space, is highly adaptable, and is simple to implement.

[0015] 3. This utility model uses a blind flange to seal the middle of the jacking pipe, which can prevent gas short circuit;

[0016] 4. This utility model has a regulating valve on the compressed air pipe, which can be used to adjust the amount of compressed air. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model installed inside the oxidation tank;

[0018] Figure 2 This is a schematic diagram of the installation structure of the oxidation-free tank type of this utility model;

[0019] Figure 3 for Figure 2 Front view structural diagram;

[0020] Figure 4 This is a schematic diagram of the gas distribution pipeline structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the pore structure;

[0022] In the diagram: 1-Gas distribution pipe, 2-Inlet tee, 3-Compressed air pipe, 4-Blind flange, 5-Air hole, 6-Oxidation tank, 7-Support; 8-Base plate; 9-Motor; 10-Stirring rod; 11-Stirring paddle;

[0023] 1.1 - Vertical pipe; 1.2 - Bottom pipe; 1.3 - Jacking pipe. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0025] like Figure 1-5As shown, a wastewater treatment oxidation tank aeration device includes an aeration pipe 1, an air inlet tee 2, and a blind flange 4. The aeration pipe 1 includes four vertical pipes 1.1, two bottom pipes 1.2, and two U-shaped top pipes 1.3. The four vertical pipes 1.1 and the two bottom pipes 1.2 are connected to form two vertical U-shaped structures. The length of the bottom pipe 1.2 is less than the width of the oxidation tank 6, and the distance between the two bottom pipes 1.2 is less than the length of a single oxidation tank 6 but greater than the diameter of the agitator 11. The bottom pipes 1.2 and the agitator 11 are located on the same horizontal plane, so that the structure can be placed on both sides of the agitator 11 inside the oxidation tank 6. The upper ends of the two U-shaped structures are respectively connected by horizontally outward U-shaped top pipes 1. The vertical pipe 1.1, the bottom pipe 1.2, and the top pipe 1.3 are connected. The air inlet tee 2 is located in the middle of one of the top pipes 1.3, and two of the air inlet tee 2 are connected to the top pipe 1.3, while the other port is connected to the compressed air pipe 3. The compressed air pipe 3 is equipped with a regulating valve. The blind plate 4 is located in the middle of the other top pipe 1.3 to block the top pipe 1.3. The distance between the air inlet tee 2 and the blind plate 4 is greater than the width of the oxidation tank 6, so that the top pipe 1.3 can be straddled on the oxidation tank 6. Several air holes 5 are evenly and symmetrically opened on both sides of the bottom surface of the two bottom pipes 1.2. The distance between adjacent air holes 5 is 10cm, and the angle α between the two air holes 5 and the center line of the bottom pipe 1.2 is 60°.

[0026] In use, the device is placed in the oxidation tank 6, with the two bottom pipes 1.2 located on both sides of the stirring paddle 10. The motor 9 is started, and the stirring rod 10 drives the stirring paddle 11 to rotate, stirring the reaction liquid in the oxidation tank 6. Then, the regulating valve on the compressed air pipe 3 is opened, and the compressed air enters the top pipe 1.3, the vertical pipe 1.1 and the bottom pipe 1.2 through the three-way valve. Since the other end is blocked by the blind plate 4, the compressed air is discharged from the air hole 5, which blows high pressure air onto the stirred liquid, causing the liquid to impact and roll. The liquid and air at the bottom are in full contact, and the reaction is more complete, making up for the shortcomings of uneven mechanical stirring.

[0027] The gas distribution pipe 1 is installed across the oxidation tank 6, which does not conflict with the stirring device. Moreover, it is reasonably designed, occupies little space, is highly adaptable, and is simple to implement.

Claims

1. An aeration device for a wastewater treatment oxidation tank, characterized in that, The system includes an air distribution pipe (1), an air inlet tee (2), and a blind flange (4). The air distribution pipe (1) includes four vertical pipes (1.1), two bottom pipes (1.2), and two U-shaped top pipes (1.3). The four vertical pipes (1.1) and the two bottom pipes (1.2) are connected to form two vertical U-shaped structures. The upper ends of the two U-shaped structures are connected by horizontally outward U-shaped top pipes (1.3). The vertical pipes (1.1), bottom pipes (1.2), and bottom pipes (1.3) are connected to each other. The pipe (1.2) is connected to the top pipe (1.3). The air inlet tee (2) is set in the middle of one top pipe (1.3), and two ports of the air inlet tee (2) are connected to the top pipe (1.3), and the other port is connected to the compressed air pipe (3). The blind plate (4) is set in the middle of another top pipe (1.3) to block the top pipe (1.3). Several air holes (5) are evenly and symmetrically opened on both sides of the bottom surface of the two bottom pipes (1.2).

2. The aeration device for a wastewater treatment oxidation tank according to claim 1, characterized in that, The length of the bottom pipe (1.2) is less than the width of the oxidation tank (6), and the distance between the two bottom pipes (1.2) is less than the length of a single oxidation tank (6) and greater than the diameter of the agitator (11).

3. The aeration device for a wastewater treatment oxidation tank according to claim 1, characterized in that, The distance between the air intake tee (2) and the blind plate (4) is greater than the width of the oxidation tank (6).

4. The aeration device for a wastewater treatment oxidation tank according to claim 1, characterized in that, The compressed air pipe (3) is equipped with a regulating valve.

5. The air diffuser for an oxidation ditch according to claim 1, wherein The distance between adjacent air holes (5) is 10cm, and the angle α between the two air holes (5) and the center line of the bottom pipe (1.2) is 60°.

6. The air diffuser for an oxidation ditch according to claim 1, wherein The bottom pipe (1.2) and the stirring paddle (11) are located on the same horizontal plane.

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