Microbubble generating unit and generator using gas jet method in liquid

Abstract

The present invention discloses a microbubble generating unit and a generator using a gas jet method in a liquid. The microbubble generator includes a plurality of microbubble generating units which are sequentially stacked and assembled as one. The microbubble generating unit includes an outer ring structure and an inner ring structure connected by inner and outer ring connecting channels. A main air inlet is formed in the inner ring structure, and a water flow channel is formed between the inner ring structure and the outer ring structure. The outer ring structure is provided with a water inlet groove which is inclined inward from bottom to top, and the water inlet groove is connected with the water flow channel. The inner ring structure is provided with a ventilation duct connecting the main air inlet and the inner and outer ring connecting channels, and an exhaust hole is provided at the upper end of the inner and outer ring connecting channels. The characteristics of the present invention are: reasonable layout, which can effectively control water pollution and manage liquid ecological quality in real time; adopting a staged water inlet design, the function is not easy to fail; it can improve the reliability of gas-liquid mass transfer quality and improve energy efficiency; it has a long service life, can reduce or optimize equipment investment, and save operating costs.

Description

Technical Field

[0001] The present invention relates to the field of fluid mechanics, and in particular to a microbubble generating unit and a generator for generating microbubbles in a liquid by using a gas jet method. Background Art

[0002] In the fields of sewage treatment, aquaculture, etc., dissolved oxygen bubble generators are often used to supply oxygen to water. The dissolved oxygen bubble generators in the prior art are explosion disks made of microporous plastic, microporous rubber, microporous ceramics or other materials or microporous explosion tubes made of rubber material installed on the exhaust pipe at the bottom of the pool. The bubble formation principle is that the gas generated by the Roots blower or air pump equipment is transported to the microporous rubber diffusion pipe through the air supply pipe. When the pressure in the microporous rubber diffusion pipe is greater than the water pressure, the gas leaks out from the designed micropores. The gas leaked from the microporous rubber diffusion pipe is quickly released due to the pressure and space. Under the combined effect of water pressure, water flow velocity and water temperature, the gas is formed in the water in the form of bubbles with a diameter of 0.2-5 mm.

[0003] The dissolved oxygen bubble generator in the prior art has low dissolved oxygen efficiency: due to the buoyancy generated by the mass and volume of the bubbles, the millimeter-sized bubbles quickly overflow the water surface and disappear into the air. Under such conditions, the dissolved oxygen mass transfer efficiency of the water body can only be maximized at the water-air interface, and the oxygen-deficient area in the water body is exactly at the bottom.

[0004] The energy consumption of the water dissolved oxygen bubble generator in the prior art is high. In order to dissolve more oxygen in the water, a large amount of air must be supplied. The millimeter-level bubbles that rise rapidly rise to the water surface rapidly, and the cycle repeats over and over again, causing the oxygen in the bubbles in the water to be wasted before it has time to be dissolved by the water, resulting in irrational use of gas (energy) resources and a large amount of waste of installed power.

[0005] The commercial value of the water dissolved oxygen bubble generator in the existing technology is low. Its formation principle and equipment technology have been pushed to the limit by the manufacturers. In addition, the gas source energy consumption is high and the water dissolved oxygen efficiency is low. The energy consumption in the entire sewage treatment and aquaculture field is relatively large.

[0006] Therefore, it is necessary to develop a water dissolved oxygen bubble generator with more economical performance. Summary of the invention

[0007] The object of the present invention is to overcome the above-mentioned inadequacies and to provide a microbubble generating unit and a generator using a gas jet method in a liquid.

[0008] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0009] A microbubble generating unit using a gas jet method in a liquid, the microbubble generating unit comprises an outer ring structure, an inner ring structure and a hollow inner and outer ring connecting channel, the inner ring structure is arranged in the outer ring structure, the two are connected by the inner and outer ring connecting channel, the cavity inside the inner ring structure forms a main air inlet channel, the outer side of the inner ring structure and the cavity inside the outer ring structure form a water flow channel, the outer ring structure is provided with a water inlet groove inclined inward from bottom to top, the water inlet groove is connected with the water flow channel, the inner ring structure is provided with a ventilation duct connecting the main air inlet channel and the inner and outer ring connecting channel, and the upper end of the inner and outer ring connecting channel is provided with an exhaust hole connecting the inner and outer ring connecting channel and the water flow channel.

[0010] A bubble dividing groove is arranged at the lower end of the inner and outer ring connecting passage.

[0011] Six inner and outer ring connecting channels are evenly distributed between the inner ring structure and the outer ring structure.

[0012] A plurality of exhaust holes are evenly distributed along the length direction at the upper end of the inner and outer ring connecting channel.

[0013] A microbubble generator using a gas jet method in a liquid includes a plurality of microbubble generating units which are stacked and assembled in sequence. A plug is installed at the upper end of an inner ring structure of the uppermost microbubble generating unit, and a lower end of an inner ring structure of the lowermost microbubble generating unit is connected to an air intake pipe.

[0014] The lower end of the inner ring structure of the micro-bubble generating unit at the lower end is provided with a mounting screw hole, which is connected to the air intake pipe through the mounting screw hole.

[0015] The outer side of the outer ring structure of the micro-bubble generating unit is uniformly provided with assembly seats, and the assembly seats are provided with assembly bolt through holes. A plurality of the micro-bubble generating units are sequentially assembled in the assembly bolt through holes through assembly screws and fastened as a whole.

[0016] One end of the inner ring structure is provided with a superimposed groove, and the other end of the inner ring structure is provided with a superimposed boss corresponding to the superimposed groove, and adjacent microbubble generating units are stacked by the superimposed groove and the superimposed boss.

[0017] The characteristics of the present invention are: reasonable layout, which can effectively control water pollution and manage the ecological quality of liquid in real time; adopting staged water inlet design, the function is not easy to fail; the size and density of bubbles and the increase and decrease of gas and plasma mass transfer values ​​can be controlled by adjusting the applied gas pressure range value, thereby improving the reliability of gas-liquid mass transfer quality and improving energy utilization efficiency; long service life, which can reduce or optimize equipment investment and save operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1The structure of the microbubble generating unit of the present invention is shown in FIG. Figure 1 .

[0019] Figure 2 The structure of the microbubble generating unit of the present invention is shown in FIG. Figure 2 .

[0020] Figure 3 The structure of the microbubble generating unit of the present invention is shown in FIG. Figure 3 .

[0021] Figure 4 Schematic diagram of the structure of the microbubble generator of the present invention Figure 1 .

[0022] Figure 5 Schematic diagram of the structure of the microbubble generator of the present invention Figure 2 .

[0023] Figure 6 It is a schematic diagram of the use of the microbubble generator of the present invention.

[0024] Wherein: 100, microbubble generator; 101, microbubble generating unit; 1, outer ring structure; 2, inner ring structure; 3, inner and outer ring connecting channel; 4, main air inlet; 5, water flow channel; 6, water inlet trough; 7, ventilation duct; 8, exhaust hole; 9, bubble dividing groove; 10, superimposed groove; 11, superimposed boss; 12, assembly seat; 13, assembly bolt through hole; 14, assembly screw; 15, plugging; 16, installation screw mouth; 200, air inlet pipe. DETAILED DESCRIPTION

[0025] like Figure 1 , 2As shown in Figure 3, the present invention is a microbubble generating unit using a gas jet method in a liquid. The microbubble generating unit 101 includes an outer ring structure 1, an inner ring structure 2 and a hollow inner and outer ring connecting channel 3. The inner ring structure 2 is arranged in the outer ring structure 1, and the two are connected by the inner and outer ring connecting channel 3. The inner and outer ring connecting channel 3 serves as a hard structural member to support the outer ring structure 1 and the inner ring structure 2. The cavity inside the inner ring structure 2 forms a main air inlet 4, and the main air inlet 4 is connected to the air inlet pipe 200. The main air inlet 4 supplies air to the microbubble generating unit 101. The outer side of the inner ring structure 2 and the cavity inside the outer ring structure 1 form a water flow channel 5. The outer ring structure 1 is provided with a water inlet groove 6 inclined inward from bottom to top, and the water (liquid) body enters the water flow channel 5 partly from the bottom of the water flow channel 5, and partly from the water inlet groove 6. A pressure difference is formed inside and outside the ring structure 1, and the water flow channel 5 forms a negative pressure area. Water can be pumped in from bottom to top, and impurities are removed while guiding the flow. The inner ring structure 2 is provided with a ventilation duct 7 connecting the main air inlet 4 and the inner and outer ring connecting channel 3. The number of the ventilation ducts 7 is the same as the number of the inner and outer ring connecting channels 3. Preferably, six inner and outer ring connecting channels 3 are evenly distributed between the inner ring structure 2 and the outer ring structure 1. The inner ring structure 2 is provided with six ventilation ducts 7. The hollow structure of the inner and outer ring connecting channels 3 is also used as an exhaust channel. A plurality of exhaust holes 8 that can connect the inner and outer ring connecting channels 3 and the water flow channel 5 are provided at the upper end of the inner and outer ring connecting channels 3 along the length direction. The exhaust hole 8 is the contact end point for contact and mass transfer between gas and liquid. A bubble segmentation groove 9 is provided at the lower end of the inner and outer ring connecting channel 3. The bubble segmentation groove 9 can cause the rising bubbles to collide, break, and subdivide, thereby further miniaturizing the large bubbles.

[0026] like Figure 4 , 5As shown in Figures 6 and 7, the microbubble generator 100 of the present invention using a gas jet method in a liquid comprises a plurality of the above-mentioned microbubble generating units 101 which are sequentially stacked and assembled as a whole. The more the number of the assembled microbubble generating units 101 is, the smaller the bubble size generated by the microbubble generator 100 is and the greater the bubble density is, and nanometer-level, micrometer-level and millimeter-level bubbles are generated in the water (liquid). One end of the inner ring structure 2 is provided with a stacking groove 10, and the other end of the inner ring structure 2 is provided with a stacking boss 11 corresponding to the stacking groove 10. Adjacent microbubble generating units 101 are stacked by the stacking groove 10 and the stacking boss 11, and the outer sides of the outer ring structures 1 of the microbubble generating units 101 are all An assembly seat 12 is arranged. Preferably, eighteen assembly seats 12 are evenly arranged on the outside of the outer ring structure 1. The assembly seat 12 is provided with an assembly bolt through hole 13. Several of the microbubble generating units 101 are assembled in sequence in the assembly bolt through hole 13 through an assembly screw 14 and fastened as a whole. A plug 15 is installed on the upper end of the inner ring structure 2 of the uppermost microbubble generating unit 101 to ensure that the gas enters the main air intake duct 4 and is discharged from the exhaust hole 8 through the ventilation duct 7 and the inner and outer ring connecting channel 3 in sequence to form bubbles. A mounting screw 16 is provided at the lower end of the inner ring structure 2 of the lowermost microbubble generating unit 101, and the microbubble generator 100 is connected to the air intake pipe 200 through the mounting screw 16.

[0027] The present invention relates to the fields and industries of sewage treatment and aquaculture water purification, and can be used for upgrading and renovating oxidation ponds in urban sewage treatment plants, upgrading and renovating sewage oxidation ponds in meat processing plants, upgrading and renovating paint recovery, washing and oxidation treatment ponds in paint spraying rooms in furniture manufacturing industry, agricultural production field - factory-scale vegetable soilless cultivation water body oxygenation equipment, aquaculture field - land-based high-density fish and shrimp farms, aquaculture water body oxidation mass transfer reuse, tail water purification treatment equipment; the present invention directly uses oxygen-containing (air) gas to improve the dissolved oxygen index of water body, and is a device that supplies water and oxygen in water body by gas mass transfer.

[0028] The present invention relates to a multiphase flow and energy and mass transfer principle technology, and is a device that generates microbubbles by means of gas jets. The turbulent flow field, fluid mechanics, shell cavity air flow channel, and structural mechanics of the microbubble generator 100 are reasonably arranged. The microbubble generating units 101 can be stacked and assembled into the microbubble generator 100. An external low-pressure gas source is passed through the microbubble generator 100 to transmit air, oxygen mass, plasma, ozone and other electric fluid substances in water (liquid). By using the microbubble generator 100 to improve the oxygen (other material element) content ratio of the liquid, gas, liquid or plasma, ozone and other elements, the gas, liquid, plasma and other element mass transfer functions are realized through the air intake pipeline to effectively control water pollution in real time and manage the ecological quality of the liquid.

[0029] The microbubble generator 100 of the present invention adopts a staged water inlet design structure, which solves the problem that the one-way water inlet end is easily blocked by sheet-like objects, thereby rendering the function ineffective; the present invention can control the size and density of bubbles and the increase or decrease of gas and plasma mass transfer values ​​by adjusting the applied gas pressure range value, thereby improving the reliability of gas-liquid mass transfer quality.

[0030] The invention has a reasonable layout and a long service life, and can reduce or optimize equipment investment. It can generate nano-, micron-, and millimeter-level high-density bubbles, improve energy efficiency, extend the maintenance interval of the fan equipment, and save operating costs.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microbubble generating unit using a gas jet method in a liquid, characterized in that: The microbubble generating unit includes an outer ring structure, an inner ring structure and a hollow inner and outer ring connecting channel, wherein the inner ring structure is arranged in the outer ring structure, and the two are connected by the inner and outer ring connecting channel, the cavity inside the inner ring structure forms a main air inlet channel, and the cavity outside the inner ring structure and the cavity inside the outer ring structure form a water flow channel, the outer ring structure is provided with a water inlet groove inclined inward from bottom to top, and the water inlet groove is connected with the water flow channel, the inner ring structure is provided with a ventilation duct connecting the main air inlet channel and the inner and outer ring connecting channel, and the upper end of the inner and outer ring connecting channel is provided with an exhaust hole connecting the inner and outer ring connecting channel and the water flow channel.

2. The microbubble generating unit using a gas jet method in a liquid as claimed in claim 1, characterized in that: A bubble dividing groove is arranged at the lower end of the inner and outer ring connecting passage.

3. The microbubble generating unit using a gas jet method in a liquid as claimed in claim 1, characterized in that: Six inner and outer ring connecting channels are evenly distributed between the inner ring structure and the outer ring structure.

4. The microbubble generating unit using a gas jet method in a liquid as claimed in claim 1, characterized in that: A plurality of exhaust holes are evenly distributed along the length direction at the upper end of the inner and outer ring connecting channel.

5. A microbubble generator using a gas jet in a liquid, characterized in that: It comprises a plurality of microbubble generating units as described in any one of claims 1 to 4 which are stacked and assembled into one, the upper end of the inner ring structure of the uppermost microbubble generating unit is installed with a plug, and the lower end of the inner ring structure of the lowermost microbubble generating unit is connected to an air intake pipe.

6. The microbubble generator using a gas jet method in a liquid as claimed in claim 5, characterized in that: The lower end of the inner ring structure of the micro-bubble generating unit at the lower end is provided with a mounting screw hole, which is connected to the air intake pipe through the mounting screw hole.

7. The microbubble generator using a gas jet method in a liquid as claimed in claim 5, characterized in that: The outer side of the outer ring structure of the micro-bubble generating unit is uniformly provided with assembly seats, and the assembly seats are provided with assembly bolt through holes. A plurality of the micro-bubble generating units are sequentially assembled in the assembly bolt through holes through assembly screws and fastened as a whole.

8. The microbubble generator using a gas jet method in a liquid as claimed in claim 5, characterized in that: One end of the inner ring structure is provided with a superimposed groove, and the other end of the inner ring structure is provided with a superimposed boss corresponding to the superimposed groove, and adjacent microbubble generating units are stacked by the superimposed groove and the superimposed boss.

Images