A nanobubble and micron bubble gradient generator

Abstract

The invention discloses a nanobubble and micron bubble gradient generator, comprising a nozzle, a first mixing section, a first self-driven rotating impeller, a first gradually expanding section, an air suction chamber, a second mixing section, a second self-driven rotating impeller, a second gradually expanding section and a gas phase inlet pipe, wherein the nozzle, the first mixing section, the first gradually expanding section, the air suction chamber, the second mixing section and the second gradually expanding section are connected in sequence by means of threads, flanges or welding. The invention precipitates nanobubbles by means of enhanced hydraulic cavitation effect in the front half of the device, forms micron bubbles by means of jet entrainment in the back half of the device, adjusts the size and concentration of the precipitated nanobubbles by changing the rotation speed of the first self-driven rotating impeller, and the second self-driven rotating impeller can change the turbulence intensity of the gas-liquid two-phase flow field, thereby affecting the size and dispersion of the bubbles, and the device has a simple structure and low energy consumption, which is conducive to the engineering of the device.

Description

Technical Field

[0001] The invention relates to the field of bubble generators, in particular to a nano bubble and micron bubble gradient generator. Background Art

[0002] Micro-nano bubbles have the advantages of large specific surface area, long residence time, and high mass transfer efficiency. They have good application effects in mineral flotation, sewage treatment, agricultural breeding, biomedicine and other fields. At present, the main methods of producing micro-nano bubbles are: electrolysis, ultrasound, pressurized dissolved air, hydraulic cavitation, and photocatalysis. However, the above-mentioned production methods have the disadvantages of high energy consumption, complex equipment, and long bubble production cycle, which limits the wide application of micro-nano bubbles in industrialization. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a nanobubble and micron bubble gradient generator to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a nanobubble and micron bubble gradient generator, comprising a nozzle, a first mixing section, a first self-driven rotating impeller, a first gradually expanding section, an air suction chamber, a second mixing section, a second self-driven rotating impeller, a second gradually expanding section and a gas phase inlet pipe, wherein the nozzle, the first mixing section, the first gradually expanding section, the air suction chamber, the second mixing section and the second gradually expanding section are connected in sequence by means of threads, flanges or welding, the gas phase inlet pipe is connected to the air suction chamber by means of threads, flanges or welding, the gas phase inlet pipe is vertically arranged to the first gradually expanding section, one end of the first gradually expanding section extends to the interior of the air suction chamber, and the ratio of the outlet diameter of the first gradually expanding section to the diameter of the second mixing section is 0.25-1.0.

[0005] Preferably, a first self-driven rotating impeller is installed inside the first mixing section, and a second self-driven rotating impeller is installed inside the second mixing section.

[0006] Preferably, the diameters of the nozzle and the suction chamber gradually decrease from the inlet to the outlet, and the diameters of the first gradually expanding section and the second gradually expanding section gradually increase from the inlet to the outlet.

[0007] Preferably, the number of the first self-driven rotating impeller and the number of the second self-driven rotating impeller are both greater than or equal to one, and the first self-driven rotating impeller and the second self-driven rotating impeller are both provided with a plurality of blades, and the number of the blades is greater than or equal to two.

[0008] Preferably, the angles of the nozzle and the suction chamber are both 10-50 degrees.

[0009] Preferably, the angles of the first gradually expanding section and the second gradually expanding section are both 4-20 degrees.

[0010] Technical effects and advantages of the present invention:

[0011] The present invention utilizes the enhanced hydrodynamic cavitation effect to precipitate nanobubbles in the front half of the device, and uses jet air entrainment to form micron bubbles in the back half of the device. The size and concentration of the precipitated nanobubbles are adjusted by changing the rotation speed of the first self-driven rotating impeller; the second self-driven rotating impeller can change the turbulence intensity of the gas-liquid two-phase flow field, thereby affecting the size and dispersion of the bubbles. The device has a simple structure and low energy consumption, which is conducive to the engineering of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] In the figure: 1, nozzle; 2, first mixing section; 201, first self-driven rotating impeller; 3, first gradually expanding section; 4, gas phase inlet pipe; 5, suction chamber; 6, second mixing section; 7, second self-driven rotating impeller; 8, second gradually expanding section. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] The present invention provides Figure 1 A nanobubble and micron bubble gradient generator is shown, comprising a nozzle 1, a first mixing section 2, a first self-driven rotating impeller 201, a first gradually expanding section 3, an air suction chamber 5, a second mixing section 6, a second self-driven rotating impeller 7, a second gradually expanding section 8 and a gas phase inlet pipe 4, wherein the nozzle 1, the first mixing section 2, the first gradually expanding section 3, the air suction chamber 5, the second mixing section 6 and the second gradually expanding section 8 are connected in sequence by means of threads, flanges or welding, the gas phase inlet pipe 4 is connected to the air suction chamber 5 by means of threads, flanges or welding, the gas phase inlet pipe 4 is vertically arranged to the first gradually expanding section 3, one end of the first gradually expanding section 3 extends to the interior of the air suction chamber 5, and the ratio of the outlet diameter of the first gradually expanding section 3 to the diameter of the second mixing section 6 is 0.25-1.0;

[0017] A first self-driven rotating impeller 201 is installed inside the first mixing section 2, and a second self-driven rotating impeller 7 is installed inside the second mixing section 6. The number of the first self-driven rotating impeller 201 and the second self-driven rotating impeller 7 is greater than or equal to one. The first self-driven rotating impeller 201 and the second self-driven rotating impeller 7 are both provided with a plurality of blades. The first self-driven rotating impeller 201 and the second self-driven rotating impeller 7 rotate by the impact of the fluid. The rotation speed is 100-3000 revolutions per minute. The rotation speed is related to the shape and number of the blades. The number of blades is greater than or equal to two. The diameters of the nozzle 1 and the suction chamber 5 gradually decrease from the inlet to the outlet, and the diameters of the first gradually expanding section 3 and the second gradually expanding section 8 gradually increase from the inlet to the outlet. The angles of the nozzle 1 and the suction chamber 5 are both 10-50 degrees, and the angles of the first gradually expanding section 3 and the second gradually expanding section 8 are both 4-20 degrees.

[0018] The working principle of the present invention is as follows: the liquid phase or the liquid-solid two-phase is rapidly accelerated in the nozzle 1, enters the first mixing section 2 to impact the first self-driven rotating impeller 201, and drives the first self-driven rotating impeller 201 to rotate. Since the pressure energy is converted into kinetic energy and mechanical energy, the pressure drops below the saturated vapor pressure, more gas is precipitated, and a large number of nano bubbles are formed; the fluid is partially pressurized and decelerated in the first gradually expanding section 3, and then sprayed into the suction chamber 5 and enters the second mixing section 6 to impact the second self-driven rotating impeller 7. The gas enters the suction chamber 5 through the gas phase inlet pipe 4 under the action of the pressure difference, and enters the second mixing section 6 under the action of high-speed fluid suction. The gas-liquid two-phase or gas-liquid-solid three-phase forms evenly dispersed micron bubbles under the shearing and crushing action of the second self-driven rotating impeller 7. The fluid enters the next process after being pressurized and decelerated in the second gradually expanding section 8.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nanobubble and microbubble gradient generator, comprising a nozzle (1), a first mixing section (2), a first self-driven rotating impeller (201), a first gradually expanding section (3), an air suction chamber (5), a second mixing section (6), a second self-driven rotating impeller (7), a second gradually expanding section (8) and a gas phase inlet pipe (4), characterized in that: The nozzle (1), the first mixing section (2), the first gradually expanding section (3), the air intake chamber (5), the second mixing section (6) and the second gradually expanding section (8) are connected in sequence by means of threads, flanges or welding; the gas phase inlet pipe (4) is connected to the air intake chamber (5) by means of threads, flanges or welding; the gas phase inlet pipe (4) is arranged perpendicular to the first gradually expanding section (3); one end of the first gradually expanding section (3) extends to the interior of the air intake chamber (5); and the ratio of the outlet diameter of the first gradually expanding section (3) to the diameter of the second mixing section (6) is 0.25-1.0; A first self-driven rotating impeller (201) is installed inside the first mixing section (2), and a second self-driven rotating impeller (7) is installed inside the second mixing section (6); The diameters of the nozzle (1) and the suction chamber (5) gradually decrease from the inlet to the outlet, and the diameters of the first gradually expanding section (3) and the second gradually expanding section (8) gradually increase from the inlet to the outlet.

2. A nanobubble and microbubble gradient generator according to claim 1, characterized in that: The number of the first self-driven rotating impeller (201) and the number of the second self-driven rotating impeller (7) are both greater than or equal to one, and the first self-driven rotating impeller (201) and the second self-driven rotating impeller (7) are both provided with a plurality of blades, and the number of the blades is greater than or equal to two.

3. A nanobubble and microbubble gradient generator according to claim 1, characterized in that: The angles of the nozzle (1) and the suction chamber (5) are both 10-50 degrees.

4. A nanobubble and microbubble gradient generator according to claim 1, characterized in that: The angles of the first gradually expanding section (3) and the second gradually expanding section (8) are both 4-20 degrees.

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