A high-efficiency oxygen-adding jet aerator

Abstract

The invention discloses a high-efficiency oxygenation jet aerator, comprising a circulation pump (1), a mixing chamber (2) provided at the outlet of the circulation pump (1), an air inlet pipe (3) provided at the top of the mixing chamber (2), a diffusion pipe (5) provided on the mixing chamber (2), a nozzle (4) provided in the mixing chamber (2), the nozzle (4) connected to the outlet of the circulation pump (1), the ejection direction of the nozzle (4) and the diffusion pipe (5) being coaxial, a driving shaft (6) provided in the nozzle (4), a plurality of driving blades (7) provided on the outer peripheral surface of the driving shaft (6), a passive shaft (8) connected to the driving shaft (6) provided in the diffusion pipe (5), and a stirring mechanism provided on the outer peripheral surface of the passive shaft (8); the nozzle (4) is in a conical tube shape, and the large end of the nozzle (4) is connected to the outlet of the circulation pump (1).

Description

Technical Field

[0001] The invention belongs to the field of jet aerators. Background Art

[0002] Traditionally, water companies have focused solely on water supply, but with the rise of environmental concerns, many are now also involved in sewage treatment projects. Jet aerators are commonly used in sewage treatment projects, increasing the oxygen content of the water in the aerobic zone, boosting the metabolic activity of microorganisms during wastewater treatment, and ultimately improving treatment results.

[0003] The structure of the existing jet aerator includes a circulating pump, a mixing chamber is provided at the outlet of the circulating pump, an air inlet pipe is provided on the top of the mixing chamber, and a diffusion pipe is provided on the mixing chamber. The circulating pump pumps sewage into the mixing chamber, and the sewage is ejected from the diffusion pipe. The flow of sewage creates a negative pressure in the mixing chamber, and air enters the mixing chamber through the air inlet pipe, mixes with the sewage, and is ejected from the diffusion pipe together, thereby increasing the oxygen content in the sewage.

[0004] Although existing jet aerators can increase the oxygen content in sewage, the mixing of air and sewage is actually not sufficient, and the oxygenation efficiency (the ratio of oxygen dissolved in water to oxygen entering water) can only reach 32%. The oxygenation efficiency is poor and it is difficult to significantly improve the metabolic activity of microorganisms.

[0005] Therefore, there is an urgent need for a jet aerator with high oxygenation efficiency to improve the sewage treatment effect. Summary of the Invention

[0006] The object of the present invention is to provide a high-efficiency oxygenation jet aerator. The present invention has the advantage of high oxygenation efficiency.

[0007] The technical solution of the present invention is as follows: a high-efficiency oxygenating jet aerator, comprising a circulating pump, a mixing chamber provided at the outlet of the circulating pump, an air inlet pipe provided on the top of the mixing chamber, a diffusion pipe provided on the mixing chamber, a nozzle provided in the mixing chamber, the nozzle connected to the outlet of the circulating pump, the ejection direction of the nozzle being coaxial with the diffusion pipe, a driving shaft provided in the nozzle, a plurality of driving blades provided on the outer circumferential surface of the driving shaft, a passive shaft connected to the driving shaft provided in the diffusion pipe, and a stirring mechanism provided on the outer circumferential surface of the passive shaft.

[0008] In the aforementioned high-efficiency oxygenation jet aerator, the nozzle is in the shape of a cone tube, and the large end of the nozzle is connected to the outlet of the circulation pump.

[0009] In the aforementioned high-efficiency oxygenating jet aerator, a first bearing is provided on the outer side of the active shaft, and the first bearing is connected to the nozzle through a first bracket; a second bearing is provided on the outer side of the passive shaft, and the second bearing is connected to the diffusion tube through a second bracket.

[0010] In the aforementioned high-efficiency oxygenation jet aerator, the mixing chamber is connected to the outer casing flange of the circulation pump, the mixing chamber is connected to the air inlet pipe flange, the diffusion tube is provided with an adapter plate connected to the mixing chamber screws, and the driving shaft and the passive shaft are plug-connected.

[0011] In the aforementioned high-efficiency oxygenation jet aerator, the air inlet pipe includes a fixed pipe connected to the mixing bin flange, a movable pipe is provided inside the fixed pipe, the upper end of the movable pipe extends out of the fixed pipe, an air-permeable anti-slip block is provided at the upper end of the movable pipe, a piston ring is provided on the movable pipe that is damped by the fixed pipe, and a set screw is provided on the fixed pipe to tighten the movable pipe.

[0012] In the aforementioned high-efficiency oxygenation jet aerator, the stirring mechanism is a plurality of passive blades.

[0013] In the aforementioned high-efficiency oxygenation jet aerator, the stirring mechanism is a plurality of circumferentially distributed iron wires, the length of the iron wires is located in the radial direction of the passive shaft, the inner end of the iron wires is fixed to the passive shaft, and the outer end of the iron wires is close to the inner wall of the diffusion tube.

[0014] In the aforementioned high-efficiency oxygenation jet aerator, the stirring mechanism is a plurality of circumferentially distributed steel ropes, both ends of which are fixed to the passive shaft, and the distance between the two ends of the steel rope and the passive shaft is the axial distance, which is less than the length of the steel rope itself.

[0015] In the aforementioned high-efficiency oxygenation jet aerator, the axial distance of the steel wire ropes and the length of the steel wire ropes themselves form a difference, and the differences formed on the multiple steel wire ropes increase in an arithmetic progression.

[0016] In the aforementioned high-efficiency oxygenated jet aerator, a separation chamber is provided at the outlet of the diffusion tube, and a separation chamber with a top opening is provided at the outlet of the diffusion tube. A drainage outlet facing the diffusion tube is provided on the side wall of the separation chamber, and a perforated plate is provided in the separation chamber. The perforated plate is located above the drainage outlet, and a granular filler is provided on the upper side of the perforated plate, and a pore structure is formed inside the filler.

[0017] Compared with the prior art, the present invention makes the following improvements on the basis of the existing jet aerator: first, a conical nozzle is provided in the mixing chamber to pressurize the water flow ejected by the circulation pump, a rotating shaft is provided in the nozzle, and a driving fan is provided on the active shaft. The high-pressure water flow in the nozzle is used to make the driving fan rotate at high speed, and is transmitted to the stirring mechanism in the diffusion tube through the active shaft and the passive shaft, so that the bubbles in the diffusion tube are cut at high speed, the bubbles are miniaturized, and the contact area between the bubbles and the water flow is increased, so that more oxygen in the bubbles can enter the water flow, thereby improving the oxygenation efficiency. Second, the structure of the air intake pipe is changed to a length-adjustable type. On the basis of ensuring that the air intake end of the air intake pipe can be located above the water surface and does not affect the outside air entering the mixing chamber, the length of the air intake pipe can be shortened as much as possible, reducing the resistance of the air flow in the air intake pipe, allowing more air to enter the mixing chamber, and increasing the bubble content in the mixing chamber, thereby improving the oxygenation efficiency. Third, by further optimizing the structure of the stirring mechanism, the oxygenation efficiency is further improved. Fourth, a separation chamber is provided at the outlet of the diffusion tube to separate bubbles from water. Water flows directly through the separation chamber and is discharged from the drain outlet without reducing the flow rate, thereby ensuring a long range of the oxygenated water body and rapid distribution in the aerobic section. The oxygenation range is large, and the bubbles float upward and are fully mixed with the sewage in the filler. The contact time is relatively long, directly oxygenating the sewage in the aerobic section, further improving the oxygenation efficiency, which can be close to 40%. Therefore, the present invention has the advantage of high oxygenation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of Example 1.

[0019] Figure 2 Schematic diagram of the internal structure of the mixing bin in Example 1.

[0020] Figure 3 yes Figure 1 Schematic diagram of the internal structure at A.

[0021] Figure 4 It is a structural schematic diagram of the stirring mechanism of Example 2.

[0022] Figure 5 Schematic diagram of the structure of the stirring mechanism of Example 3.

[0023] Figure 6 It is a structural diagram of the separation bin in Example 4.

[0024] The marks in the accompanying drawings are: 1-circulation pump, 2-mixing chamber, 3-inlet pipe, 4-nozzle, 5-diffuser, 6-active shaft, 7-driving blade, 8-passive shaft, 9-first bearing, 10-first bracket, 11-second bearing, 12-second bracket, 13-adapter plate, 14-fixed pipe, 15-moving pipe, 16-piston ring, 17-set screw, 18-passive blade, 19-iron wire, 20-wire rope, 21-separation chamber, 22-drain outlet, 23-orifice plate, 24-filler, 25-hoop, 26-anti-slip block. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0026] Example 1. A high-efficiency oxygenating jet aerator, such as Figure 1 As shown, it is improved from the QSB type self-priming jet aerator, including a circulating pump 1, a mixing chamber 2 is provided at the outlet of the circulating pump 1, an air inlet pipe 3 is provided on the top of the mixing chamber 2, and a diffusion pipe 5 is provided on the mixing chamber 2. The characteristics are that a nozzle 4 is provided in the mixing chamber 2, the nozzle 4 is connected to the outlet of the circulating pump 1, the injection direction of the nozzle 4 is coaxial with the diffusion pipe 5, a driving shaft 6 is provided in the nozzle 4, a plurality of driving blades 7 are provided on the outer peripheral surface of the driving shaft 6, a passive shaft 8 connected to the driving shaft 6 is provided in the diffusion pipe 5, and a stirring mechanism is provided on the outer peripheral surface of the passive shaft 8.

[0027] The nozzle 4 is a conical tube, and the large end of the nozzle 4 is connected to the outlet of the circulation pump 1. The shape of the nozzle 4 can increase the flow rate of the sewage ejected from the nozzle 4, increase the negative pressure in the mixing chamber 2, and increase the bubble content in the diffusion tube 5.

[0028] A first bearing 9 is provided on the outer side of the driving shaft 6 , and the first bearing 9 is connected to the nozzle 4 through a first bracket 10 ; a second bearing 11 is provided on the outer side of the passive shaft 8 , and the second bearing 11 is connected to the diffuser 5 through a second bracket 12 .

[0029] The mixing chamber is flange-connected to the outer casing of the circulation pump 1, which is also flange-connected to the intake pipe 3. The diffuser 5 is provided with an adapter plate 13 that is screwed to the mixing chamber 2. The driving shaft 6 and the driven shaft 8 are plug-connected by a plug with a hexagonal cross-section at the end of the driving shaft 6 and a groove that mates with the plug at the end of the driven shaft 8. The intake pipe 3, diffuser 5, and circulation pump 1 are all detachably connected to the mixing chamber 2, making it easy to disassemble and repair the jet aerator in the event of blockage or damage.

[0030] The air inlet pipe 3 includes a fixed pipe 14 flange-connected to the mixing chamber 2. A movable pipe 15 is disposed within the fixed pipe 14. The upper end of the movable pipe 15 extends out of the fixed pipe 14. A breathable anti-dropout block 26 is disposed at the upper end of the movable pipe 15. The anti-dropout block 26 can be a high-throughput air stone or can be directly perforated. External air enters the movable pipe 15 through the anti-dropout block 26. The function of the anti-dropout block 26 is to prevent the movable pipe 15 from falling entirely into the fixed pipe 14. The movable pipe 15 is provided with a piston ring 16 dampingly connected to the fixed pipe 14. The piston ring 16 is made of rubber. The fixed pipe 14 is provided with a set screw 17 for compressing the movable pipe 15.

[0031] The stirring mechanism is a plurality of passive blades 18. The shapes of the driving blades 7 and the passive blades 18 are similar to the blades of an electric fan and have a helical angle.

[0032] The outlet of the diffusion tube 5 is provided with a separation chamber 21 with a top opening, and a drainage port 22 facing the diffusion tube 5 is provided on the side wall of the separation chamber 21. A perforated plate 23 is provided in the separation chamber 21, and the perforated plate 23 is located above the drainage port 22. A granular filler 24 is provided on the upper side of the perforated plate 23. The filler 24 is pebbles with a diameter of 0.5-1 cm, and a pore structure is formed inside the filler 24.

[0033] The working principle of Example 1 is as follows: A high-efficiency oxygenating jet aerator is placed in the sewage in the aerobic section. The length of the air inlet pipe 3 is adjusted according to the sewage level, so that the upper end of the air inlet pipe 3 is above the liquid level. The adjustment is performed by loosening the set screw 17, pulling the movable tube 15 until the upper end of the movable tube is above the liquid level, and then tightening the set screw 17 to fix the length of the air inlet pipe 3. The circulating pump is then started to pump sewage, which is then ejected from the nozzle 4 toward the diffuser 5. The water flow creates a negative pressure in the mixing chamber 2. Outside air enters the mixing chamber 2 through the air inlet pipe 3, mixes with the sewage, and is ejected from the diffuser 5, forming bubbles in the diffuser 5. As the sewage passes through the nozzle 4, the driving blades 7 rotate the active shaft 6, which in turn drives the passive shaft 8, which in turn drives the passive blades 18, which cut the bubbles in the diffuser 5, miniaturizing them, increasing the contact area between the bubbles and the sewage, and improving the oxygenation efficiency.

[0034] Compared with the existing jet aerator, Example 1 is provided with a driving blade 7 in the nozzle 4. The characteristics of the water flow in the nozzle 4 being air-free, dense and having strong impact are utilized to obtain a huge driving force. The driving force is transmitted to the passive blade 18 through the active shaft 6 and the passive shaft 8, so that the passive blade 18 obtains high rotational energy and cuts the bubbles in the diffusion tube 5, which can greatly improve the oxygenation efficiency. However, due to the large area of ​​the passive blade 18, the rotational resistance is large and the rotation speed is limited, the oxygenation efficiency can only be increased to 36.8%.

[0035] Example 2. Unlike Example 1, the stirring mechanism comprises a plurality of circumferentially distributed iron wires 19, with the length of the iron wires 19 being radially disposed in the direction of the passive shaft 8. The inner ends of the iron wires 19 are fixed to the passive shaft 8, while the outer ends of the iron wires 19 are adjacent to the inner wall of the diffuser 5. In Example 2, the iron wires 19 are used to cut the bubbles, thereby improving the oxygenation efficiency.

[0036] Compared with Example 1, the rotation area of ​​the iron wire 19 in Example 2 is much smaller than that of the passive fan blade 18. Therefore, the rotation resistance is smaller, the rotation is improved, and the oxygenation efficiency is correspondingly improved. After testing and calculation, the oxygenation efficiency can be increased to 37.4%.

[0037] Example 3. Unlike Example 2, the stirring mechanism is a plurality of circumferentially distributed steel ropes 20, the steel ropes 20 are a multi-strand twisted structure, the diameter of the steel ropes 20 is 0.5-1 mm, both ends of the steel ropes 20 are fixed to the passive shaft 8 by a clamp 25, the distance between the two ends of the steel ropes 20 and the passive shaft 8 is the axial distance, and the axial distance of the steel ropes 20 is less than the length of the steel ropes 20 themselves. The axial distance of the steel ropes 20 and the length of the steel ropes 20 themselves constitute a difference, and the differences formed on the multiple steel ropes 20 increase in an arithmetic progression. In Example 3, the steel ropes 20 are used to cut the bubbles to improve the oxygenation efficiency. When the passive shaft 8 rotates, the middle part of the steel rope 20 with the largest difference is close to the inner wall of the diffuser 5, and the outermost bubbles are cut, and the middle parts of the remaining steel ropes 20 gradually approach the passive shaft 8 to cut the inner bubbles.

[0038] Compared with Example 2, in Example 3, the iron wire 19 rotates only on one cutting plane, forming a small cutting range, resulting in the oxygenation efficiency being only increased to 37.4%. In addition, in order to reduce the rotational resistance, the iron wire 19 can only be set to a relatively low diameter, which makes it easy to deform or even break under the impact of the water flow, resulting in a high failure rate. However, the steel wire rope 20 forms a drum-shaped cutting surface under the action of centrifugal force, with a larger cutting range. In addition, multiple steel wire ropes 20 form multiple cutting surfaces, which are distributed in various areas where the water flows through, and can more effectively break up bubbles and make the contact between air and water more sufficient, thereby further improving the oxygenation efficiency, which can reach 38.5%. In addition, the steel wire rope 20 itself has good flexibility and is subjected to force at both ends. Under the premise of ensuring a small diameter and low rotational resistance, it can also ensure that it will not break, and the formed cutting surface will not change after long-term use, resulting in a low failure rate.

[0039] Example 4. Based on Example 3, a separation chamber 21 with an open top is provided at the outlet of the diffuser tube 5. A drain port 22 is provided on the sidewall of the separation chamber 21, facing the diffuser tube 5. A perforated plate 23 is provided within the separation chamber 21, located above the drain port 22. Granular filler 24 is provided on the upper side of the perforated plate 23, with a height of 0.3 meters and a pore structure formed within the filler 24. In Example 4, after sewage is ejected from the diffuser tube 5, it enters the separation chamber 21 and is discharged from the drain port 22. Most of the bubbles ejected from the diffuser tube 5 float upward, pass through the perforated plate 23, and penetrate the filler 24, where they are divided and miniaturized by the filler 24. They slowly float upward and are discharged from the top of the separation chamber 21, extending the contact time between the bubbles and the sewage and further increasing the oxygenation efficiency, which can reach 39.2%.

Claims

1. A high-efficiency oxygenating jet aerator, comprising a circulating pump (1), a mixing chamber (2) provided at the outlet of the circulating pump (1), an air inlet pipe (3) provided at the top of the mixing chamber (2), and a diffusion pipe (5) provided on the mixing chamber (2), characterized in that: A nozzle (4) is provided in the mixing chamber (2), the nozzle (4) is connected to the outlet of the circulation pump (1), the ejection direction of the nozzle (4) is coaxial with the diffusion tube (5), a driving shaft (6) is provided in the nozzle (4), a plurality of driving blades (7) are provided on the outer peripheral surface of the driving shaft (6), a passive shaft (8) connected to the driving shaft (6) is provided in the diffusion tube (5), a stirring mechanism is provided on the outer peripheral surface of the passive shaft (8), and the length of the air inlet pipe (3) is adjustable; a separation chamber (21) with a top opening is provided at the outlet of the diffusion tube (5), a drainage port (22) facing the diffusion tube (5) is provided on the side wall of the separation chamber (21), a perforated plate (23) is provided in the separation chamber (21), the perforated plate (23) is located above the drainage port (22), a granular filler (24) is provided on the upper side of the perforated plate (23), and a pore structure is formed inside the filler (24).

2. The high-efficiency oxygenation jet aerator according to claim 1, characterized in that: The nozzle (4) is in the shape of a cone tube, and the large end of the nozzle (4) is connected to the outlet of the circulation pump (1).

3. The high-efficiency oxygenation jet aerator according to claim 1, characterized in that: A first bearing (9) is provided on the outside of the active shaft (6), and the first bearing (9) is connected to the nozzle (4) via a first bracket (10); a second bearing (11) is provided on the outside of the passive shaft (8), and the second bearing (11) is connected to the diffusion tube (5) via a second bracket (12).

4. The high-efficiency oxygenation jet aerator according to claim 1, characterized in that: The mixing chamber is flange-connected to the outer shell of the circulation pump (1), and the mixing chamber is flange-connected to the air inlet pipe (3). The diffusion pipe (5) is provided with an adapter plate (13) screw-connected to the mixing chamber (2), and the driving shaft (6) and the driven shaft (8) are plug-connected.

5. The high-efficiency oxygenation jet aerator according to claim 4, characterized in that: The air inlet pipe (3) includes a fixed pipe (14) connected to the mixing chamber (2) by a flange, a movable pipe (15) is provided inside the fixed pipe (14), the upper end of the movable pipe (15) extends out of the fixed pipe (14), the upper end of the movable pipe (15) is provided with a breathable anti-slip block (26), the movable pipe (15) is provided with a piston ring (16) connected to the fixed pipe (14) for damping, and the fixed pipe (14) is provided with a set screw (17) for pressing the movable pipe (15).

6. The high-efficiency oxygenation jet aerator according to claim 1, characterized in that: The stirring mechanism is a plurality of passive blades (18).

7. The high-efficiency oxygenation jet aerator according to claim 1, characterized in that: The stirring mechanism is a plurality of iron wires (19) distributed circumferentially. The length of the iron wires (19) is located in the radial direction of the passive shaft (8). The inner end of the iron wires (19) is fixed to the passive shaft (8), and the outer end of the iron wires (19) is close to the inner wall of the diffusion tube (5).

8. The high-efficiency oxygenation jet aerator according to claim 1, characterized in that: The stirring mechanism comprises a plurality of steel wire ropes (20) distributed circumferentially, both ends of the steel wire ropes (20) being fixed to the passive shaft (8), the distance between the two ends of the steel wire ropes (20) and the passive shaft (8) being fixed is the axial distance, and the axial distance of the steel wire ropes (20) is less than the length of the steel wire ropes (20) themselves.

9. The high-efficiency oxygenation jet aerator according to claim 8, characterized in that: The axial distance of the steel wire rope (20) and the length of the steel wire rope (20) itself form a difference, and the differences formed on the plurality of steel wire ropes (20) increase in an arithmetic progression.

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