CN116158398B - A single-hole high-pressure aeration type water body oxygenation device and method - Google Patents

Abstract

The invention discloses a single-hole high-pressure aeration type water body oxygenation device and method. The oxygenation device includes a water surface mechanism and an underwater mechanism; the water surface mechanism includes a pontoon for floating on the water surface and an air pump arranged on the pontoon ; The underwater mechanism includes a channel, a single-hole aeration pipe, a ventilation pipe and a bubble-breaking net cylinder; the channel is fixedly connected to the pontoon through a fixed rod; the single-hole aeration tube is arranged in the channel In the cavity, one end of the single-hole aeration pipe communicates with the air pump through the ventilation pipe. The single-hole aeration pipe includes a nozzle and a plurality of variable diameter pipes connected in sequence. The inner diameters of the outlet ends of the multiple variable diameter pipes are along the gradually decreases along the moving direction of the airflow; the nozzle communicates with the variable diameter pipe with the smallest diameter, and the outlet of the nozzle extends into the bubble-breaking net cylinder; the bubble-breaking net cylinder is arranged in the inner cavity of the channel, the A plurality of broken bubble holes are arranged on the broken bubble mesh cylinder. The invention has the advantages of low energy consumption, high efficiency of dissolved oxygen, and the microporous tube is not easily blocked.

Description

A single-hole high-pressure aeration type water body oxygenation device and method

technical field

The invention relates to a water body oxygenation device and method, in particular to a single-hole high-pressure aeration type water body oxygenation device and method.

Background technique

One of the key points of aquaculture water purification is to increase the dissolved oxygen content in the water. Dissolved oxygen is a key factor affecting the feeding rate, feed utilization rate, weight gain rate and morbidity of aquatic products. It can ensure the survival rate of aquatic products, Quality and yield and the quality of the culture water environment. In the freshwater aquaculture industry, one of the main measures to increase or maintain the dissolved oxygen content in water is to use aeration equipment, which has the functions of hydraulic jump, liquid level renewal, negative pressure air intake, oxygen storage, aeration, etc. Function.

At present, the common mechanical aerators include impeller aerator, waterwheel aerator, jet aerator, microporous aeration water aerator, surge aerator, etc.; among them, the impeller, The waterwheel, jet and surge aerators are all covered on the surface of the water body, and the air is mixed with the water body by stirring the water body through the blades; while the microporous aeration type water body aerator mainly aerates and supplies oxygen from the bottom of the water. Some aeration-type water aerators have disadvantages such as high energy consumption, low efficiency of dissolved oxygen, and easy blockage of microporous tubes.

Contents of the invention

The object of the present invention is to overcome the above-mentioned existing problems, and provide a single-hole high-pressure aeration type water body oxygenation device, which has the advantages of low energy consumption, high dissolved oxygen efficiency and microporous tubes. Easy to block and other advantages.

Another object of the present invention is to provide a single-hole high-pressure aeration type water body oxygenation method.

The object of the present invention is achieved through the following technical solutions:

A single-hole high-pressure aeration type water body oxygenation device, including a water surface mechanism and an underwater mechanism; the water surface mechanism includes a pontoon for floating on the water surface and an air pump arranged on the pontoon;

The underwater mechanism includes a waterway, a single-hole aeration pipe, a ventilation pipe, and a bubble-breaking net cylinder; the waterway is fixedly connected to the pontoon through a fixed rod; the single-hole aeration pipe is arranged in the inner cavity of the waterway Among them, one end of the single-hole aeration pipe communicates with the air pump through the ventilation pipe, and the single-hole aeration pipe includes a nozzle and a plurality of variable-diameter tubes connected in sequence, and the inner diameters of the outlet ends of the multiple variable-diameter tubes are along the The moving direction of the airflow gradually decreases; the nozzle communicates with the variable-diameter pipe with the smallest diameter, and the outlet of the nozzle extends into the bubble-breaking net tube; the bubble-breaking net tube is arranged in the inner cavity of the channel, and the broken-bubble net tube The foam net cylinder is provided with a plurality of broken foam holes.

The working principle of the above-mentioned single-hole high-pressure aeration type water body oxygenation device is as follows:

When working, start the power supply, the air pump starts to pressurize the air, and transports the high-pressure airflow to the single-hole aeration pipe in the channel through the ventilation pipe. Since the single-hole aeration tube is equipped with multiple variable-diameter tubes whose inner diameters gradually decrease along the direction of airflow movement, when the airflow enters the single-hole aeration tube, the volume gradually becomes smaller, which increases the pressure of the airflow again, thereby achieving a higher speed. Spray from nozzle. When the gas flow (gas phase) enters the water (liquid phase), the water is sheared to form a large number of bubbles through the strong mutual impact of the two, and the bubbles move at high speed in the channel; at the same time, they are constantly panting with the surrounding gas molecules The collision further fragments the gas, causing more small bubbles to be generated when the gas is sprayed into the water body; the small bubbles are fragmented into smaller microbubbles after passing through the bubble breaking net tube, and overflow into the water body. Further, since the air bubbles are small and the contact surface between the air and the water body is increased, the dissolved oxygen in the water body, especially at the bottom of the water body, can be rapidly and evenly increased. Moreover, the air bubbles can also break the thermocline of the upper and lower water layers during the movement outside the channel, which increases the fluidity of the water and further improves the effect of oxygenation.

In a preferred solution of the present invention, the nozzle is a conical structure with a gradually smaller inner cavity, so as to further increase the pressure of the jetting airflow.

In a preferred solution of the present invention, the reducing pipe includes an installation part, a transition part and an output part; the transition part is fixedly communicated between the installation part and the output part, and the transition part is a cone-shaped structure; the output The diameter of the output portion is smaller than the diameter of the mounting portion, which constitutes the outlet port; along the direction of the air flow, the inner diameter of the downstream output portion is smaller than the inner diameter of the upstream output portion.

Further, the diameters of the installation parts of all the reducing pipes are equal, so that the outer surfaces of the same size can be connected.

In a preferred solution of the present invention, a water turbine is provided in the waterway, and the water turbine is arranged directly in front of the bubble breaking net cylinder. In this way, the rotation of the water turbine can push the water in the pond to flow, so that the water in the pond can be fully turned, forming a circulation in the pond, transporting the water with sufficient dissolved oxygen to all parts of the pond, and forming a relatively uniform distribution of dissolved oxygen. Therefore, it has a good increase Oxygen and the effect of promoting the flow of water body, the effect of pushing and mixing is good, and it will not cause damage to fish and shrimp.

A single-hole high-pressure aeration type water body oxygenation method, comprising the following steps:

Turn on the power, the air pump starts to pressurize the air, and transports the high-pressure air to the single-hole aeration pipe in the channel through the ventilation pipe;

When the air enters the single-hole aeration tube, the volume of the air gradually decreases, the pressure of the air gradually increases, and the air is ejected from the nozzle at a higher speed;

When the air enters the water, the water is sheared to form a large number of bubbles through the strong mutual impact of the two, and the bubbles move at high speed in the channel; the bubbles and the surrounding air molecules are constantly panting and colliding, further fragmenting the air, When the air is sprayed to the water body, more small bubbles are stimulated; the small bubbles are broken into smaller micro-bubbles after passing through the bubble-breaking net tube, and overflow into the water body, increasing the contact area between the air and water; at the same time, the air The oxygen in the water contacts with the water body, and then diffuses into the water, increasing the dissolved oxygen content in the water.

A preferred version of the present invention, wherein, in the diffusion process, the diffusion flux of oxygen is obtained by the following formula:

；

;

In the formula, A represents oxygen, B represents water; N _AB is the diffusion flux of A in B, expressed by the number of moles of A per unit cross-sectional area perpendicular to the diffusion direction in unit time; D _AB is the flux of A in B It can be assumed that its value has nothing to do with concentration at a certain temperature and pressure; dC _A /d _Z is the concentration gradient of A along the Z axis, and the Z axis represents the diffusion direction.

A preferred solution of the present invention, wherein, in the process of oxygenation, the water body in the channel is pushed to flow through the water turbine, and the high dissolved oxygen water after oxygenation is pushed out, so that the water flow circulates along one direction, which is beneficial to promote the dissolution of water in the water. Uniformity of oxygen distribution.

Compared with the prior art, the present invention has the following beneficial effects:

1. The single-hole high-pressure aeration type water oxygenation device of the present invention injects high-pressure air into the water of the pond at high speed, can form tiny bubbles, and rapidly increase dissolved oxygen in the water, and is suitable for high-density cultured aquatic fish.

2. The single-hole high-pressure aeration type water oxygenation device of the present invention is not easy to block, has the ability of self-cleaning, improves the efficiency of oxygenation, and can greatly save the production cost of farmers when the same oxygen index is reached.

3. After the high-pressure gas is sprayed from the single-hole aeration tube, it is equivalent to releasing the pressure, and the temperature of the nozzle will decrease. Under the same conditions, the lower the temperature, the higher the dissolved oxygen content in the water, so the dissolved oxygen content in the surrounding water will decrease. After increasing and reaching saturation, it mixes evenly with the surrounding water and injects oxygen into the water more efficiently.

4. After the high-pressure gas is introduced, although the pressure of the water outlet of the single-hole aeration pipe is greater than the atmospheric pressure outside the waterway, a local relatively high pressure is formed. Under the same conditions, the higher the pressure, the higher the dissolved oxygen content in the water, which improves the oxygenation efficiency of the oxygenation device.

5. The air bubbles are made smaller through the bubble-breaking net cylinder, and the water body in the channel can also enter the bubble-breaking net cylinder for fragmentation, which is beneficial to increase the dissolved oxygen in the water.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the single-hole high-pressure aeration type water body oxygenation device of the present invention.

Fig. 2 is a side view of the single-hole high-pressure aeration type water body aeration device of the present invention with the channel hidden.

Fig. 3 is a sectional view of the underwater mechanism of the present invention.

Implementation

In order for those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described below in conjunction with the examples and accompanying drawings, but the embodiments of the present invention are not limited thereto.

Referring to Fig. 1-Fig. 3, the single-hole high-pressure aeration type water body aeration device of the present embodiment includes a surface mechanism and an underwater mechanism; The air pump 2; the underwater mechanism includes a channel 3, a fixed rod 4, a single-hole aeration pipe 5, a ventilation pipe 6 and a broken bubble net tube 7; the fixed rod 4 is fixed between the pontoon 1 and the channel 3; The single-hole aeration pipe 5 is arranged in the inner cavity of the channel 3, and one end of the single-hole aeration pipe 5 communicates with the air pump 2 through the ventilation pipe 6, and the single-hole aeration pipe 5 includes a nozzle 5 -1 and three successively connected reducing tubes 5-2 (of course, the reducing tubes 5-2 can also be two, four or even more), the inner diameters of the three reducing tubes 5-2 are along The moving direction of the airflow gradually decreases; the nozzle 5-1 communicates with the variable diameter pipe 5-2 with the smallest diameter, and the outlet of the nozzle 5-1 extends into the bubble-breaking net cylinder 7; the bubble-breaking net cylinder 7 Set in the inner cavity of the channel 3, the bubble breaking net cylinder 7 is provided with a plurality of broken bubble holes.

Furthermore, the nozzle 5-1 is a tapered structure with a gradually smaller inner cavity, so as to further increase the pressure of the ejected airflow.

Referring to Fig. 3, the reducing pipe 5-2 includes an installation part, a transition part and an output part; the transition part is fixedly communicated between the installation part and the output part, and the transition part is a cone-shaped structure; the output part The diameter is smaller than the diameter of the mounting part which constitutes said outlet port; in the direction of the gas flow, the downstream output part 5-2 has a smaller inner diameter than the upstream output part 5-2.

Further, the diameters of the installation parts of all the reducing pipes 5-2 are equal, so that they can be connected to form outer surfaces of the same size.

Referring to FIGS. 2-3 , a water turbine 8 is arranged in the waterway 3 , and the water turbine 8 is arranged directly in front of the foam-breaking net cylinder 7 . In this way, the rotation of the water turbine 8 can promote the flow of water in the pond, fully turn the water in the pond, form a circulation in the pond, transport the water with sufficient dissolved oxygen to all parts of the pond, and form a relatively uniform distribution of dissolved oxygen, so it has a good increase. Oxygen and the effect of promoting the flow of water body, the effect of pushing and mixing is good, and it will not cause damage to fish and shrimp.

Referring to Fig. 1-Fig. 3, the working principle of the single-hole high-pressure aeration type water body aeration device of the present embodiment is:

High-pressure air is charged into the single-hole aeration tube 5 at high speed through the air pump 2, and then aerated in the water body to increase the contact area between the air and water, so as to increase the dissolved oxygen content in the water, which can quickly increase the dissolved oxygen in the water, effectively It can greatly reduce the exhaust gas in the fish pond, improve the survival rate of organisms, promote the convective exchange of the upper and lower water bodies, avoid the separation and stratification of dissolved oxygen in the water, and improve the water quality.

Referring to Fig. 1-Fig. 3, the single hole high pressure aeration type water body oxygenation method of the present embodiment comprises the following steps:

Start the power supply, the air pump 2 starts to pressurize the air, and the high-pressure air is delivered to the single-hole aeration pipe 5 in the channel 3 through the ventilation pipe 6 .

After the air enters the single-hole aeration tube 5, the volume of the air becomes smaller gradually, the pressure of the air becomes higher gradually, and the air is ejected from the nozzle 5-1 at a higher speed.

When the air enters the water, the water is sheared to form a large number of bubbles through the strong mutual impact of the two, and the bubbles move at high speed in the channel 3; the bubbles and the surrounding air molecules are constantly panting and colliding, further fragmenting the air , so that when the air is sprayed to the water body, more small air bubbles are excited; the small air bubbles are broken into smaller micro-bubbles after passing through the bubble-breaking net tube 7, and overflow into the water body, increasing the contact area between the air and water; at the same time , the oxygen in the air contacts with the water body, and then diffuses into the water, increasing the dissolved oxygen content in the water.

The water flow in the water channel 3 is driven by the water turbine 8, and the oxygen-increased high dissolved oxygen water is pushed out, so that the water flow circulates in one direction, which is beneficial to promote the uniformity of the dissolved oxygen distribution in the water.

During the diffusion process, the diffusion flux of oxygen is obtained by the following formula:

。

.

In the formula, A represents oxygen, B represents water; N _AB is the diffusion flux of A in B, expressed by the number of moles of A per unit cross-sectional area perpendicular to the diffusion direction in unit time; D _AB is the flux of A in B It can be assumed that its value has nothing to do with concentration at a certain temperature and pressure; dC _A /d _Z is the concentration gradient of A along the Z axis, and the Z axis represents the diffusion direction. Further, it is assumed that the value of the diffusion coefficient is independent of concentration at a certain temperature and pressure.

The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above content, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention, All should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (5)

1. A single-hole high-pressure aeration type water body aeration device is characterized in that it comprises a water surface mechanism and an underwater mechanism; the water surface mechanism includes a pontoon for floating on the water surface and an air pump arranged on the pontoon; The underwater mechanism includes a waterway, a single-hole aeration pipe, a ventilation pipe, and a bubble-breaking net cylinder; the waterway is fixedly connected to the pontoon through a fixed rod; the single-hole aeration pipe is arranged in the inner cavity of the waterway Among them, one end of the single-hole aeration pipe communicates with the air pump through the ventilation pipe, and the single-hole aeration pipe includes a nozzle and a plurality of variable-diameter tubes connected in sequence, and the inner diameters of the outlet ends of the multiple variable-diameter tubes are along the The moving direction of the airflow gradually decreases; the nozzle communicates with the variable-diameter pipe with the smallest diameter, and the outlet of the nozzle extends into the bubble-breaking net tube; the bubble-breaking net tube is arranged in the inner cavity of the channel, and the broken-bubble net tube There are many broken bubble holes on the foam net tube; The nozzle is a tapered structure with gradually smaller cavity size; The reducing tube includes a mounting part, a gradual change part and an output part; the gradual change part is fixedly communicated between the mounting part and the output part, and the gradual change part is a cone-shaped structure; the diameter of the output part is smaller than the diameter of the mounting part, The output part constitutes said outlet port; along the direction of the air flow, the inner diameter of the downstream output part is smaller than the inner diameter of the upstream output part; The diameters of the mounting portions of all reducers are equal. 2. The single-hole high-pressure aeration type water body oxygenation device according to claim 1, characterized in that, a water turbine is arranged in the channel, and the water turbine is arranged directly in front of the bubble breaking net cylinder. 3. A single-hole high-pressure aeration type water body oxygenation method applied to the single-hole high-pressure aeration type water body oxygenation device described in any one of claims 1-2, it is characterized in that, comprising the following steps: Turn on the power, the air pump starts to pressurize the air, and transports the high-pressure air to the single-hole aeration pipe in the channel through the ventilation pipe; When the air enters the single-hole aeration tube, the volume of the air gradually decreases, the pressure of the air gradually increases, and the air is ejected from the nozzle at a higher speed; When the air enters the water, under the impact force, the water is sheared to form a large number of bubbles, and the bubbles move at high speed in the channel; the bubbles collide with the surrounding air molecules continuously, further fragmenting the air, and spraying the air to the water body more small bubbles are stimulated; the small bubbles are broken into smaller microbubbles after passing through the broken bubble net tube, and overflow into the water body, increasing the contact area between the air and water; at the same time, the oxygen in the air and the water body Contact, and then diffuse into the water, increasing the dissolved oxygen content in the water. 4. the single hole high pressure aeration type water body aeration method according to claim 3, is characterized in that, in the diffusion process, the diffusion flux of oxygen is obtained by following formula:

; In the formula, A represents oxygen, B represents water; N _AB is the diffusion flux of A in B, expressed by the number of moles of A per unit cross-sectional area perpendicular to the diffusion direction in unit time; D _AB is the flux of A in B The diffusion coefficient; dC _A /d _Z is the concentration gradient of A along the Z axis, and the Z axis represents the diffusion direction. 5. The single-hole high-pressure aeration type water body oxygenation method according to claim 3, characterized in that, in the process of oxygenation, the water flow in the channel is promoted by the water turbine, and the high dissolved oxygen water after oxygenation is pushed out , causing the flow to circulate in one direction.

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