High gas-water ratio double-stage jet aerator for supplying oxygen and reducing temperature for aerobic tank

Abstract

This utility model belongs to the field of wastewater treatment, and in particular, it is a high air-to-water ratio two-stage jet aerator for supplying oxygen and cooling aerobic tanks. Addressing the problems of low gas-liquid mixing efficiency, insufficient cooling performance, structural defects, severe bubble merging, insufficient oxygen dissolution time, and high energy consumption and maintenance costs in existing aeration equipment, the following solution is proposed: It includes a two-stage jet aerator. A converging tube is fixedly connected to the bottom of the two-stage jet aerator. A mixing outlet pipe is fixedly connected to the bottom of the converging tube. A diverging tube is fixedly connected to the bottom of the mixing outlet pipe. An inlet pipe is fixedly inserted into the top of the two-stage jet aerator. In this utility model, based on the jet principle, a large-diameter hydraulic nozzle is used. Driven by a water pump, it generates negative pressure to draw in air. The air and the high-speed water flow simultaneously enter the air-water reaction chamber. In the air-water reaction chamber, oxygen is rapidly dissolved into the water body through high pressure and simultaneously flushed into the water body.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a high air-to-water ratio dual-stage jet aerator for supplying oxygen and cooling aerobic tanks. Background Technology

[0002] In wastewater treatment, the aerobic tank, as the core unit of biological treatment, directly affects the treatment effect through its oxygen supply efficiency and temperature control. Traditional aeration equipment (such as blower aerators and mechanical aerators) generally suffers from the following technical bottlenecks:

[0003] Low gas-liquid mixing efficiency: The single-stage jet structure leads to insufficient mixing of gas and liquid, large bubble diameter, limited oxygen transfer efficiency, and gas is prone to escape from the liquid surface, resulting in energy waste.

[0004] Insufficient cooling performance: Existing equipment lacks an active cooling mechanism. In high-temperature seasons or under high-load conditions, the water temperature in the aerobic tank is prone to exceed 35°C, which inhibits microbial activity.

[0005] Structural defects: A single mixing path makes it difficult to achieve multiple gas-liquid cuts and disturbances; the simple design of the mixing channel leads to severe bubble merging and insufficient oxygen dissolution time.

[0006] High energy consumption and maintenance costs: To achieve a higher oxygen supply, it is necessary to increase the power of the blower or extend the aeration time, and the equipment is prone to clogging and requires frequent maintenance. Utility Model Content

[0007] The purpose of this invention is to address the following shortcomings in existing aeration equipment: low gas-liquid mixing efficiency (single-stage jet structure leads to insufficient gas-liquid mixing, large bubble diameter, limited oxygen transfer efficiency, and easy gas escape from the liquid surface, resulting in energy waste); insufficient cooling performance (existing equipment lacks an active cooling mechanism, and the aerobic tank water temperature easily exceeds 35℃ in high-temperature seasons or under high-load conditions, inhibiting microbial activity); structural defects (a single mixing path makes it difficult to achieve multiple gas-liquid cutting and disturbance, and the simple design of the mixing channel leads to severe bubble merging and insufficient oxygen dissolution time); and high energy consumption and maintenance costs (to achieve a higher oxygen supply, it is necessary to increase the fan power or extend the aeration time, and the equipment is prone to clogging and requires frequent maintenance). Therefore, this invention proposes a high-air-to-water ratio dual-stage jet aerator for supplying oxygen and cooling aerobic tanks.

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

[0009] A high air-to-water ratio dual-stage jet aerator for supplying oxygen and cooling an aerobic tank includes a secondary jet aerator. The bottom of the secondary jet aerator is fixedly connected to a converging tube, the bottom of the converging tube is fixedly connected to a mixing outlet tube, the bottom of the mixing outlet tube is fixedly connected to a diverging tube, the top of the secondary jet aerator is fixedly connected to an inlet pipe, the bottom of the inlet pipe is fixedly connected to a nozzle, and the interior of the secondary jet aerator is provided with a first mixing component for gas-liquid mixing.

[0010] The mixing outlet pipe is equipped with a second mixing component for gas-liquid mixing.

[0011] In one possible design, the first mixing assembly includes multiple upper ribs fixedly connected to the top of the inner wall of the secondary jet injector. The multiple upper ribs are arranged in a ring around the outside of the liquid inlet pipe. Multiple middle ribs are fixedly connected to the middle of the inner wall of the secondary jet injector. The multiple middle ribs are arranged in a ring around the lower side of the nozzle. The space between the middle ribs and the upper ribs forms a primary suction chamber. The primary suction chamber is used for mixing the liquid inside the nozzle with the gas passing through the upper ribs.

[0012] In one possible design, the first mixing assembly further includes a throat fixedly connected between multiple middle ribs, the throat being located directly below the nozzle, and multiple lower ribs fixedly connected to the bottom of the inner wall of the secondary jet, the multiple lower ribs being arranged in a ring on the outer wall of the throat.

[0013] In one possible design, the tapered tube has a secondary intake chamber inside, which is used for gas-liquid mixing again.

[0014] In one possible design, the second mixing assembly includes two sets of guide members fixedly connected to the inner wall of the mixing outlet pipe. Each set of guide members includes a mounting block and multiple arc-shaped guide plates. The multiple arc-shaped guide plates are fixedly connected in a ring to the outer wall of the mounting block. The ends of the multiple arc-shaped guide plates that are far apart from each other are fixedly connected to the inner wall of the mixing outlet pipe. The two sets of guide members are respectively fixedly connected to the top and bottom positions of the mixing outlet pipe.

[0015] In one possible design, the second mixing assembly includes two sets of guide members fixedly connected to the inner wall of the mixing outlet pipe. Each set of guide members includes a mounting block and multiple arc-shaped guide plates. The multiple arc-shaped guide plates are fixedly connected in a ring to the outer wall of the mounting block. The ends of the multiple arc-shaped guide plates that are far apart from each other are fixedly connected to the inner wall of the mixing outlet pipe. The two sets of guide members are respectively fixedly connected to the top and bottom positions of the mixing outlet pipe.

[0016] In one possible design, the fixed inner rod has a cavity inside, and a sliding circular plate is slidably connected inside the cavity. Connecting blocks are fixedly connected to both sides of the sliding circular plate, and the connecting blocks are fixedly connected to the inner wall of the sliding cylinder. Springs are provided between the top and bottom of the sliding circular plate and the top and bottom inner walls of the cavity, respectively. Both ends of the springs abut against the inner wall of the cavity and one side of the sliding circular plate through spring seats.

[0017] In this application, the jet ejector is a two-stage jetting device that utilizes the Venturi effect. The working water pump discharges liquid through the nozzle of the jet ejector. As the nozzle diameter decreases, the liquid is ejected from the nozzle at an extremely high speed. The high-speed flowing liquid passes through the air intake chamber and enters the throat tube, forming a local vacuum in the throat tube. A large amount of air is drawn in (or forced in) through the air guide tube and enters the throat tube. Under the action of the water spray pressure, it is broken into a large number of tiny bubbles, which mix with the water.

[0018] The primary gas-liquid mixture is discharged outward through the diffuser, where its velocity decreases and its pressure increases, forming a powerful jet stream. This jet then passes through the secondary intake chamber and enters the mixing outlet pipe for secondary gas mixing. This improves the efficiency of gas transfer and mixing within the liquid.

[0019] After being cut and agitated multiple times, the bubbles become countless tiny bubbles with a large surface area, making it easier for oxygen in the air to dissolve in the water more quickly. Because the bubbles are small in diameter and rise slowly, the time for atmospheric oxygen to dissolve in the water is prolonged, promoting thorough mixing and contact between the liquid and oxygen.

[0020] Furthermore, inside the mixing outlet pipe, the gas and liquid will be mixed again along the arc-shaped holes between multiple arc-shaped guide plates. This will also push the movable block down, which in turn drives the sliding cylinder down, which in turn drives the connecting block down, which in turn drives the sliding circular plate down. This will compress the spring below and stretch the spring above, creating a gap between the movable block and the fixed block, allowing the gas and liquid to mix again for a better mixing effect.

[0021] Beneficial effects: Based on the jet principle, a large-diameter hydraulic nozzle, driven by a water pump, generates negative pressure to draw in air. The air and the high-speed water flow simultaneously enter the air-water reaction chamber. Within the chamber, oxygen rapidly dissolves into the water under high pressure and is simultaneously injected into the water body. Compared to traditional aeration equipment, oxygen transfer efficiency is significantly improved. It features high oxygenation efficiency, simple system structure, and large jet (aeration) depth.

[0022] It can simultaneously realize the oxygenation and aeration process of the sewage treatment system, and can completely replace the oxygenation and aeration equipment in the biological sewage treatment process; it does not clog; has a long service life; and is noiseless.

[0023] It is suitable for use in aeration tanks, aerated grit chambers, mixing and stirring, ozone contact oxidation processes in sewage treatment plants, iron and manganese removal in water purification processes, oxygenation and mixing of sewage and sludge mixtures, and mixing of gases or liquids in aquaculture pond oxygenation or water supply equipment.

[0024] It can replace the blower aeration system commonly used in sewage treatment plants, thereby increasing oxygen utilization by more than 30% and reducing energy consumption by 30%-50%.

[0025] Maintenance is more convenient and faster. When used in aeration applications in sewage treatment plants, it can be operated and maintained without interruption, improving efficiency and reducing operating and maintenance costs. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a high air-to-water ratio dual-stage jet aerator for supplying oxygen and cooling an aerobic tank, as proposed in this utility model.

[0027] Figure 2 This is a schematic diagram of the principle of a high air-to-water ratio two-stage jet aerator for supplying oxygen and cooling an aerobic tank, as proposed in this utility model.

[0028] Figure 3 A three-dimensional structural diagram of the mixing outlet pipe in a high air-to-water ratio dual-stage jet aerator for supplying oxygen and cooling an aerobic tank, as proposed in this utility model.

[0029] Figure 4 A three-dimensional cross-sectional view of the mixing outlet pipe in a high air-to-water ratio two-stage jet aerator for supplying oxygen and cooling an aerobic tank, as proposed in this utility model.

[0030] Figure 5 This is an exploded view of the fixed inner rod and sliding sleeve in a high air-to-water ratio two-stage jet aerator for supplying oxygen and cooling an aerobic tank, as proposed in this utility model.

[0031] In the diagram: 1. Inlet pipe; 2. Secondary jet ejector; 3. Converging tube; 4. Mixing outlet pipe; 5. Diverging tube; 6. Throat; 7. Primary intake chamber; 8. Nozzle; 9. Upper rib; 10. Middle rib; 11. Lower rib; 12. Arc-shaped guide plate; 13. Mounting block; 14. Movable block; 15. Sliding cylinder; 16. Fixed block; 17. Fixed inner rod; 18. Sliding circular plate; 19. Connecting block; 20. Cavity; 21. Spring; 22. Secondary intake chamber. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] Example 1

[0034] Reference Figure 1-5 An aerator includes: a secondary jet injector 2, a converging tube 3 fixedly connected to the bottom of the secondary jet injector 2, a mixing outlet pipe 4 fixedly connected to the bottom of the converging tube 3, and a diffuser 5 fixedly connected to the bottom of the mixing outlet pipe 4. The primary gas-liquid mixture is discharged outward through the diffuser, its velocity decreases, its pressure increases, forming a powerful jet stream, which enters the mixing outlet pipe 4 through the secondary intake chamber 22 for secondary intake gas mixing. To improve the efficiency of gas transfer and mixing in the liquid, a liquid inlet pipe 1 is fixedly connected to the top of the secondary jet injector 2, and a nozzle 8 is fixedly connected to the bottom of the liquid inlet pipe 1. The secondary jet injector 2 has a first mixing assembly for gas-liquid mixing inside. This first mixing assembly includes multiple upper ribs 9 fixedly connected to the top of the inner wall of the secondary jet injector 2, arranged in a ring outside the liquid inlet pipe 1. Multiple middle ribs 10 are fixedly connected to the middle of the inner wall of the secondary jet injector 2, arranged in a ring below the nozzle 8. The space between the middle ribs 10 and the upper ribs 9 forms a primary intake chamber 7, which is used to mix the liquid inside the nozzle 8 with the gas passing through the upper ribs 9. The first mixing assembly also includes a single throat 6 fixedly connected between the multiple middle ribs 10, located at the nozzle. Directly below point 8, multiple lower ribs 11 are fixedly connected to the bottom of the inner wall of the secondary jet ejector 2. These lower ribs 11 are arranged in a ring on the outer wall of the throat tube 6. A secondary suction chamber 22 is opened inside the tapered tube 3. The secondary suction chamber 22 is used for further gas-liquid mixing. This jet ejector is a two-stage injection device that utilizes the Venturi effect. The working water pump output liquid passes through the nozzle of the jet ejector. As the nozzle diameter decreases, the liquid is ejected from the nozzle at an extremely high speed. The high-speed flowing liquid passes through the suction chamber and enters the throat tube 6, creating a partial vacuum in the throat tube 6. A large amount of air is drawn in (or forced in) through the air guide tube and enters the throat tube 6. Under the action of the water spray pressure, it is broken into a large number of tiny bubbles, forming a mixture with the water. After being cut and disturbed by the jet multiple times, the bubbles become countless tiny bubbles with a large surface area, making it easier for oxygen in the air to dissolve in the water quickly. Because the bubble diameter is small and the rising speed is slow, the time for atmospheric oxygen to dissolve in water is prolonged, promoting full mixing and contact between the liquid and oxygen.

[0035] The mixing outlet pipe 4 is internally equipped with a second mixing assembly for gas-liquid mixing. The second mixing assembly includes two sets of guide members fixedly connected to the inner wall of the mixing outlet pipe 4. Each set of guide members includes a mounting block 13 and multiple arc-shaped guide plates 12. The multiple arc-shaped guide plates 12 are annularly fixedly connected to the outer wall of the mounting block 13. The ends of the multiple arc-shaped guide plates 12 that are far apart from each other are fixedly connected to the inner wall of the mixing outlet pipe 4. The two sets of guide members are respectively fixedly connected to the top and bottom positions of the mixing outlet pipe 4. A single fixed inner rod 17 is fixedly connected between the two mounting blocks 13. A sliding cylinder 15 is slidably sleeved on the outer wall of the fixed inner rod 17. The outer wall of the sliding cylinder 15 is fixedly connected to... Two symmetrically arranged movable blocks 14 are provided, and two symmetrically arranged fixed blocks 16 are fixedly connected to the inner wall of the mixing outlet pipe 4. The movable blocks 14 and the fixed blocks 16 work together to form a complete circle. Inside the mixing outlet pipe 4, the gas and liquid will be mixed again along the arc holes between multiple arc-shaped guide plates 12. The movable blocks 14 will also push the movable blocks 14 down, which will drive the sliding cylinder 15 down. The sliding cylinder 15 will drive the connecting block 19 down, and the connecting block 19 will drive the sliding circular plate 18 down, which will squeeze the spring 21 below and stretch the spring 21 above. A gap will appear between the movable blocks 14 and the fixed blocks 16, and the gas and liquid will be mixed again, resulting in a better mixing effect.

[0036] This application can be used in the field of wastewater treatment, or in other fields applicable to this application.

[0037] Example 2

[0038] refer to Figure 1-5 An improvement based on Example 1: A high air-to-water ratio dual-stage jet aerator for supplying oxygen and cooling an aerobic tank, which is applied to the field of wastewater treatment. A cavity 20 is opened inside the fixed inner rod 17. A sliding circular plate 18 is slidably connected inside the cavity 20. Connecting blocks 19 are fixedly connected to both sides of the sliding circular plate 18. The connecting blocks 19 are fixedly connected to the inner wall of the sliding cylinder 15. Springs 21 are provided between the top and bottom of the sliding circular plate 18 and the top and bottom inner walls of the cavity 20, respectively. Both ends of the springs 21 abut against the inner wall of the cavity 20 and one side of the sliding circular plate 18 through spring 21 seats.

[0039] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high air-to-water ratio two-stage jet aerator for supplying oxygen and cooling an aerobic tank, characterized in that, include: A secondary jet ejector (2) is provided with a converging tube (3) fixedly connected to its bottom, a mixing outlet tube (4) fixedly connected to its bottom, a diverging tube (5) fixedly connected to its bottom, an inlet tube (1) fixedly inserted into its top, and a nozzle (8) fixedly connected to its bottom. The secondary jet ejector (2) is equipped with a first mixing component for gas-liquid mixing. The mixing outlet pipe (4) is internally provided with a second mixing assembly for gas-liquid mixing. The second mixing assembly includes two sets of guide members fixedly connected to the inner wall of the mixing outlet pipe (4). Each set of guide members includes a mounting block (13) and multiple arc-shaped guide plates (12). The multiple arc-shaped guide plates (12) are fixedly connected in a ring to the outer wall of the mounting block (13). The ends of the multiple arc-shaped guide plates (12) that are far apart from each other are fixedly connected to the inner wall of the mixing outlet pipe (4). The two sets of guide members are fixedly connected to the top and bottom positions of the mixing outlet pipe (4), respectively. The same fixed inner rod (17) is fixedly connected between the two mounting blocks (13). A sliding cylinder (15) is slidably sleeved on the outer wall of the fixed inner rod (17). The outer wall of the sliding cylinder (15) is fixedly connected with symmetrical Two movable blocks (14) are set, and two fixed blocks (16) are fixedly connected to the inner wall of the mixing outlet pipe (4). The movable blocks (14) and the fixed blocks (16) work together to form a complete circle. A cavity (20) is opened inside the fixed inner rod (17). A sliding circular plate (18) is slidably connected inside the cavity (20). A connecting block (19) is fixedly connected to both sides of the sliding circular plate (18). The connecting block (19) is fixedly connected to the inner wall of the sliding cylinder (15). A spring (21) is set between the top and bottom of the sliding circular plate (18) and the top and bottom inner walls of the cavity (20), respectively. Both ends of the spring (21) are in contact with the inner wall of the cavity (20) and one side of the sliding circular plate (18) through the spring (21) seat.

2. The high air-to-water ratio dual-stage jet aerator for supplying oxygen and cooling an aerobic tank according to claim 1, characterized in that, The first mixing component includes multiple upper ribs (9) fixedly connected to the top of the inner wall of the secondary jet injector (2). The multiple upper ribs (9) are arranged in a ring outside the liquid inlet pipe (1). Multiple middle ribs (10) are fixedly connected to the middle of the inner wall of the secondary jet injector (2). The multiple middle ribs (10) are arranged in a ring below the nozzle (8). The space between the middle ribs (10) and the upper ribs (9) forms a primary suction chamber (7). The primary suction chamber (7) is used to mix the liquid inside the nozzle (8) with the gas passing through the upper ribs (9).

3. The high air-to-water ratio two-stage jet aerator for supplying oxygen and cooling an aerobic tank according to claim 1, characterized in that, The first mixing assembly also includes a throat (6) fixedly connected between a plurality of middle ribs (10), the throat (6) being located directly below the nozzle (8), and a plurality of lower ribs (11) fixedly connected to the bottom of the inner wall of the secondary jet (2), the plurality of lower ribs (11) being arranged in a ring on the outer wall of the throat (6).

4. A high air-to-water ratio two-stage jet aerator for supplying oxygen and cooling an aerobic tank according to claim 3, characterized in that, The converging tube (3) has a secondary intake chamber (22) inside, which is used for gas-liquid mixing again.

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