An efficient water jet aeration device and its usage method

Abstract

An efficient water jet aeration device and its usage method, including a device bench. On the upper surface of the top plate of the device bench, a counterflow cavitation disc is installed. The counterflow cavitation disc is connected to the air outlet end of a water jet nozzle through a counterflow water inlet on it. The air inlet end of the water jet nozzle is connected to an air inlet valve. The water inlet end of the water jet nozzle is connected to one end of a metal braided hose through a water inlet regulating valve. The other end of the metal braided hose is sequentially connected to a high-pressure water inlet submersible pump through a tee pipe and a water inlet pipe, and a pressure gauge and a liquid flowmeter are installed on the water inlet pipe. Through the annular jet cavity of the water jet nozzle and the counterflow cavitation disc of the present invention, under the high-pressure water flow provided by the submersible pump, negative pressure suction and counter jet vortices are formed, and the hydrodynamic cavitation effect occurs twice continuously, enabling the bubbles to be cracked from the inside, thereby quickly and efficiently increasing the dissolved oxygen in the water body, being able to fully utilize the oxygen molecules in the gas, greatly reducing the dissipation and loss of the gas, and making the dissolved oxygen reach a supersaturated state.

Description

Technical Field

[0001] The present invention belongs to the technical fields of aquaculture and environmental protection water treatment, and particularly relates to an efficient water jet aeration device and a using method thereof. Background Art

[0002] At present, the aeration technologies adopted in the aquaculture industry and the environmental protection water treatment field mostly use Roots blowers to increase the dissolved oxygen in water through aeration heads. When aerating by this method, the generated bubbles are relatively large, and most of the gas escapes into the air. The effective gas used to increase the dissolved oxygen in water is less, and the value that can increase the dissolved oxygen in water is also very limited. After the Roots blower stops aerating, due to the small number of microbubbles formed and the low solubility, the consumption rate of the dissolved oxygen in water is relatively fast. Therefore, to maintain a certain level of dissolved oxygen value, intermittent or continuous aeration is usually required continuously. This results in relatively high operating energy consumption, significantly increasing the costs of application industries such as aquaculture, and is contrary to the concept of energy conservation and emission reduction advocated by the country. Summary of the Invention

[0003] The purpose of the present invention is to provide an efficient water jet aeration device and a using method thereof applied to the fields of aquaculture aeration or environmental protection technology. By utilizing the hydrodynamic cavitation effect and the tearing force of the counter-jet vortex, the dissolved oxygen in water can be increased more efficiently and rapidly, while reducing the energy consumption cost.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An efficient water jet aeration device includes a device bench frame, a convection cavitation disc, a water jet nozzle, an air inlet valve, a water inlet regulating valve, a metal braided hose, a three-way pipe, a pressure gauge, a hydraulic flowmeter, a water inlet pipe and a high-pressure water inlet submersible pump; the upper surface of the top plate of the device bench frame is provided with a convection cavitation disc, and the convection cavitation disc is connected to the outlet end of the water jet nozzle through the convection water inlet on it to form an efficient water jet aeration device. The air inlet end of the water jet nozzle is connected to the air inlet valve, the water inlet end of the water jet nozzle is connected to one end of the metal braided hose through the water inlet regulating valve, the other end of the metal braided hose is connected to the three-way pipe, the inlet of the three-way pipe is connected to the high-pressure water inlet submersible pump through the water inlet pipe, and a pressure gauge and a liquid flowmeter are installed on the water inlet pipe, and the pressure gauge is arranged closer to the three-way pipe than the liquid flowmeter, and the water outlet of the convection cavitation disc penetrates through the top plate of the device bench frame.

[0006] The water jet nozzle includes a suction threaded pipe, a high-pressure water inlet chamber, a mixed jet outlet and screws. The air inlet of the high-pressure water inlet chamber is connected to the outlet end of the suction threaded pipe through an end plate and screws, and the outlet end of the suction threaded pipe is arranged inside the high-pressure water inlet chamber. The inlet end of the suction threaded pipe is threadedly connected to an intake valve, and the intake valve is connected to the atmosphere or an air pump. The intake valve is used to adjust the intake air flow. The mixed outlet of the high-pressure water inlet chamber is connected to the mixed jet outlet through screws, and the mixed jet outlet is threadedly connected to the convective water inlet of the convective cavitation disc.

[0007] The outlet end of the suction threaded pipe is frustum-shaped, and the fan angle α is 54° - 64°; the inner hole of the inlet end of the mixed jet outlet is frustum-shaped, and the fan angle β is 54° - 64°; the outlet end of the suction threaded pipe and the inlet end of the mixed jet outlet cooperate to form an annular mixing chamber.

[0008] The small-diameter part of the outlet end of the suction threaded pipe is threadedly connected to the central hole of the end cover, and a sealing ring is arranged between the large-diameter part of the outlet end and the central hole of the end cover; the water inlet distance L between the end face of the outlet end of the suction threaded pipe and the mixed jet outlet is 0 mm - 18.5 mm. By screwing the suction threaded pipe to adjust the water inlet distance of the cavity between it and the mixed jet outlet, the water inlet pressure, air-water flow rate, hydraulic cavitation and counter-jet eddy state can be changed.

[0009] The convective cavitation disc includes a cover body, a convective cavity, a visual glass and a water outlet. The top of the convective cavity is connected with a cover body through a connecting nut. The center of the cover body is inlaid with a visual glass. The center of the bottom end of the convective cavity is provided with a water outlet. The outer circumferential surface of the convective cavity is provided with convective water inlets along the circumference, and a connecting ball valve is installed on the unused convective water inlets.

[0010] A method for using an efficient water jet aeration device includes the following steps:

[0011] When it is necessary to increase the dissolved oxygen content in the water body, first ensure that the intake valve and the water inlet regulating valve are in the open state, and place the outlet end of the pipeline connected to the high-pressure water inlet submersible pump into the water body to be aerated; the head of the high-pressure water inlet submersible pump reaches more than 30 m, and the flow rate can be selected according to the actual situation; turn on the power supply. When the efficient water jet aeration device starts to operate, under the high-pressure water flow provided by the high-pressure water inlet submersible pump, a negative pressure can be formed at the annular fan-shaped connection between the suction threaded pipe and the mixed jet outlet in the water jet nozzle, and air is sucked in from the suction threaded pipe, and a primary hydraulic cavitation effect occurs when it is injected into the mixed jet outlet, causing the bubbles to crack from the inside to form micro-bubbles, so that the oxygen molecules can be dissolved quickly and efficiently; then the water body is injected into the convective cavitation disc from both ends through the convective water inlets, and a secondary hydraulic cavitation effect occurs under the action of the counter-jet eddy with strong tearing force, further dissolving the oxygen molecules, and then flowing into the water body through the water outlet.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. Through the annular jet cavity of the water jet nozzle and the countercurrent cavitation disc of the present invention, under the high-pressure water flow provided by the submersible pump, negative pressure suction and countercurrent eddy currents are formed, and the hydraulic cavitation effect occurs continuously twice, enabling the bubbles to be cracked from the inside, thereby quickly and efficiently increasing the dissolved oxygen in the water body, realizing the full utilization of oxygen molecules in the gas, greatly reducing the dissipation and loss of the gas, and enabling the dissolved oxygen to easily reach the supersaturated state.

[0014] 2. Through the hydraulic cavitation effect continuously occurring in the water jet nozzle and the countercurrent cavitation disc and the countercurrent eddy currents with strong tearing force of the present invention, the inhaled air is fully cracked to form microbubbles, which not only significantly increases the content of dissolved oxygen in the water body, but also can increase the residence time of gas molecules in the water, enabling the dissolved oxygen value to be maintained at a high level for a longer time. The time and frequency of aeration are reduced, thereby reducing energy consumption and saving operating costs, achieving the effect of energy conservation and emission reduction.

[0015] 3. Through the six countercurrent water inlets provided on the countercurrent cavitation disc of the present invention, the installation quantity of the water jet nozzle can be changed according to different water volumes and dissolved oxygen requirements, realizing flexible application.

[0016] 4. The present invention is not limited to increasing the content of dissolved oxygen in the water body, and is also applicable to various situations of gas-liquid two-phase mixing and dissolution, with a wider application range. Brief Description of the Drawings

[0017] Figure 1 It is the top view of the high-efficiency water jet oxygenation device of the present invention;

[0018] Figure 2 It is the front view of the water jet nozzle of the present invention;

[0019] Figure 3 It is the cross-sectional view of the water jet nozzle of the present invention;

[0020] Figure 4 It is the side view of the water jet nozzle of the present invention;

[0021] Figure 5 It is the attached view of the countercurrent cavitation disc of the present invention;

[0022] Figure 6 It is the cross-sectional view of the countercurrent cavitation disc of the present invention;

[0023] Figure 7 It is the top view of the installation and connection structure of the high-efficiency water jet oxygenation device of the present invention;

[0024] Figure 8It is a side view of the installation and connection structure of the high-efficiency water jet aeration device of the present invention;

[0025] 1. Water jet nozzle; 2. Suction threaded pipeline; 3. High-pressure water inlet chamber; 4. Mixed jet outlet; 5. Screw; 6. Convective cavitation disc; 7. Visual glass; 8. Convective cavity; 9. Water outlet; 10. Convective water inlet; 11. Connecting nut; 12. Cover body; 13. Intake valve; 14. Device bench; 15. Water inlet regulating valve; 16. Metal braided hose; 17. Three-way pipeline; 18. Pressure gauge; 19. Liquid flowmeter; 20. High-pressure water inlet submersible pump. Specific embodiments

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] As Figures 1 to 8 shown, a high-efficiency water jet aeration device includes a device bench 14, a convective cavitation disc 6, a water jet nozzle 1, an intake valve 13, a water inlet regulating valve 15, a metal braided hose 16, a three-way pipeline 17, a pressure gauge 18, a hydraulic flowmeter, a water inlet pipe and a high-pressure water inlet submersible pump 20; on the upper surface of the top plate of the device bench 14, a convective cavitation disc 6 is installed, and the convective cavitation disc 6 and the outlet end of the water jet nozzle 1 are connected through the convective water inlet 10 thereon to form a high-efficiency water jet aeration device. The number of the convective water inlet 10 and the water jet nozzle 1 can be adjusted according to specific situations. The air inlet end of the water jet nozzle 1 is connected to the intake valve 13, the water inlet end of the water jet nozzle 1 is connected to one end of the metal braided hose 16 through the water inlet regulating valve 15, the other end of the metal braided hose 16 is connected to the three-way pipeline 17, the inlet of the three-way pipeline 17 is connected to the high-pressure water inlet submersible pump 20 through the water inlet pipe, and a pressure gauge 18 and a liquid flowmeter 19 are installed on the water inlet pipe, and the pressure gauge 18 is arranged closer to the three-way pipeline 17 than the liquid flowmeter 19. The water outlet 9 of the flow cavitation disc penetrates through the top plate of the device bench 14.

[0028] The water jet nozzle 1 includes a suction threaded pipeline 2, a high-pressure water inlet chamber 3, a mixed jet outlet 4 and a screw 5. The air inlet of the high-pressure water inlet chamber 3 is connected to the outlet end of the suction threaded pipeline 2 through an end plate and a screw 5, and the outlet end of the suction threaded pipeline 2 is arranged inside the high-pressure water inlet chamber 3. The air inlet end of the suction threaded pipeline 2 is threadedly connected to the intake valve 13, and the intake valve 13 is connected to the atmosphere or an air pump. The intake valve 13 is used to adjust the intake air flow. When the dissolved oxygen in the water body needs to be higher than the dissolved oxygen of natural suction, the air intake volume is increased by connecting an air pump. The mixed outlet of the high-pressure water inlet chamber 3 is connected to the mixed jet outlet 4 through a screw 5, and the mixed jet outlet 4 is threadedly connected to the convective water inlet 10 of the convective cavitation disc 6.

[0029] The outlet end of the air intake threaded pipe 2 is frustum-shaped, and the fan angle α is 59°; the inner hole of the water inlet end of the mixed jet outlet 4 is frustum-shaped, and the fan angle β is 59°; the outlet end of the air intake threaded pipe 2 and the water inlet end of the mixed jet outlet 4 cooperate to form an annular mixing chamber.

[0030] The small-diameter part of the outlet end of the air intake threaded pipe 2 is threadedly connected to the central hole of the end cover, and a sealing ring is provided between the large-diameter part of the outlet end and the central hole of the end cover; the water inlet distance L between the end face of the outlet end of the air intake threaded pipe 2 and the mixed jet outlet 4 is 1.5 mm. The water inlet distance L is adjusted by screwing the air intake threaded pipe 2, thereby adjusting the air intake volume of natural air intake.

[0031] The convection cavitation disc 6 includes a cover body 12, a convection cavity 8, a visual glass 7 and a water outlet 9. The top of the convection cavity 8 is connected with a cover body 12 through a connecting nut 11. The visual glass 7 is inlaid in the center of the cover body 12. A water outlet 9 is provided at the center of the bottom end of the convection cavity 8. Six convection water inlets 10 are circumferentially arranged on the outer circumferential surface of the convection cavity 8, and connecting ball valves are installed on the four unused convection water inlets 10.

[0032] A method for using an efficient water jet aeration device includes the following steps:

[0033] When it is necessary to increase the dissolved oxygen content of the water body, first ensure that the intake valve 13 and the water inlet regulating valve 15 are in the open state, and place the outlet end of the pipeline connected to the high-pressure water inlet submersible pump 20 and the water outlet 9 into the water body to be aerated; the head of the high-pressure water inlet submersible pump 20 is 35 m, and the flow rate can be selected according to the actual situation; turn on the power supply. After the efficient water jet aeration device starts to operate, under the high-pressure water flow provided by the high-pressure water inlet submersible pump 20, due to the reduced diameter and increased flow rate of the air intake threaded pipe 2 and the mixed jet outlet 4 in the water jet nozzle 1, a negative pressure is formed at the annular fan-shaped connection between the air intake threaded pipe 2 and the mixed jet outlet 4 in the water jet nozzle 1, causing natural air intake at the air inlet of the air intake threaded pipe 2. The air inhaled through the air intake threaded pipe 2 undergoes a primary hydraulic cavitation effect when it enters the mixed jet outlet 4, causing the bubbles to crack from the inside to form micro-bubbles, so that the oxygen molecules can be dissolved quickly and efficiently; then the water body is injected into the convection cavitation disc 6 from both ends through the convection water inlets 10, and a second hydraulic cavitation effect occurs under the action of the counter-jet eddy current with strong tearing force, further dissolving the oxygen molecules, and then flowing into the water body through the water outlet 9.

Claims

1. An efficient water jet aeration device, characterized in that, It includes a device bench, a convection cavitation disc, a water jet nozzle, an air inlet valve, a water inlet regulating valve, a metal braided hose, a tee pipe, a pressure gauge, a hydraulic flowmeter, a water inlet pipe and a high-pressure water inlet submersible pump; on the upper surface of the top plate of the device bench, a convection cavitation disc is installed. The convection cavitation disc is connected to the outlet end of the water jet nozzle through the convection water inlet on it to form an efficient water jet aeration device. The air inlet end of the water jet nozzle is connected to the air inlet valve. The water inlet end of the water jet nozzle is connected to one end of the metal braided hose through the water inlet regulating valve. The other end of the metal braided hose is connected to the tee pipe. The inlet of the tee pipe is connected to the high-pressure water inlet submersible pump through the water inlet pipe. A pressure gauge and a liquid flowmeter are installed on the water inlet pipe, and the pressure gauge is arranged closer to the tee pipe than the liquid flowmeter. The water outlet of the flow cavitation disc penetrates through the top plate of the device bench; The water jet nozzle includes a suction threaded pipe, a high-pressure water inlet chamber, a mixed jet outlet and a screw. The air inlet of the high-pressure water inlet chamber is connected to the outlet end of the suction threaded pipe through an end plate and a screw, and the outlet end of the suction threaded pipe is arranged inside the high-pressure water inlet chamber. The air inlet end of the suction threaded pipe is threadedly connected to the air inlet valve. The air inlet valve is connected to the atmosphere or an air pump. The air inlet valve is used to adjust the air inlet flow. The mixed outlet of the high-pressure water inlet chamber is connected to the mixed jet outlet through a screw, and the mixed jet outlet is threadedly connected to the convection water inlet of the convection cavitation disc; The outlet end of the suction threaded pipe is frustum-shaped, and the fan angle α is 54° - 64°; the inner hole of the water inlet end of the mixed jet outlet is frustum-shaped, and the fan angle β is 54° - 64°; the outlet end of the suction threaded pipe and the water inlet end of the mixed jet outlet cooperate to form an annular mixing chamber; The convection cavitation disc includes a convection cavity body. A water outlet is arranged at the center of the bottom end of the convection cavity body. Convection water inlets are arranged circumferentially on the outer circular surface of the convection cavity body.

2. The high-efficiency water jet aeration device according to claim 1, characterized in that: The small-diameter part of the outlet end of the suction threaded pipe is threadedly connected to the central hole of the end cover, and a sealing ring is arranged between the large-diameter part of the outlet end and the central hole of the end cover; the water inlet distance L between the end face of the outlet end of the suction threaded pipe and the mixed jet outlet is 0 mm - 18.5 mm. By screwing the suction threaded pipe to adjust the water inlet distance of the cavity between it and the mixed jet outlet, the water inlet pressure, the air-water flow rate, the hydraulic cavitation and the counter-jet vortex state can be changed.

3. An efficient water jet aeration device according to claim 1, characterized in that: The convection cavitation disc further includes a cover body, a visual glass and a water outlet. The top of the convection cavity body is connected with a cover body through a connecting nut, and a visual glass is inlaid in the center of the cover body; a connecting ball valve is installed on the unused convection water inlet.

4. The usage method of an efficient water jet aeration device according to claim 1, characterized in that, It includes the following steps: When it is necessary to increase the dissolved oxygen content in water, first ensure that the intake valve and the inlet regulating valve are in the open state, and place the water outlet end of the pipeline connected to the high-pressure submersible inlet pump into the water body that needs to be aerated; turn on the power supply. After the high-efficiency water jet aeration device starts to operate, under the high-pressure water flow provided by the high-pressure submersible inlet pump, a negative pressure can be formed at the annular fan-shaped connection between the air suction threaded pipeline and the mixed jet outlet in the water jet nozzle, and air is sucked in from the air suction threaded pipeline. When it is injected into the mixed jet outlet, a primary hydraulic cavitation effect occurs, causing the bubbles to crack from the inside to form microbubbles, so that oxygen molecules can be dissolved quickly and efficiently; then the water body is injected into the convection cavitation disc from both ends through the convection water inlet, and a secondary hydraulic cavitation effect occurs under the action of the counter-jet eddy current with strong tearing force, further dissolving the oxygen molecules, and then flowing into the water body through the water outlet.

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