Air-water mixing device and air floatation equipment

Abstract

The application provides a gas-water mixing device which is suitable for being arranged on an inlet channel of a gas floatation tank and has an air inlet suitable for being connected with an air source; the device comprises an adjusting device, an air pipe and a cyclone device; the air pipe is connected with the cyclone device and the adjusting device; the adjusting device is configured to adjust the amount of air entering the air pipe; the cyclone device is internally provided with a plurality of cyclone channels which are communicated with the air pipe and communicated with air outlets arranged on the outer surface of the cyclone device; each cyclone channel is arranged in a spiral shape; the cyclone device is configured to make the airflow form a rotating airflow in the inlet channel after passing through the spiral-shaped cyclone channels. The application also provides a gas floatation equipment comprising the gas-water mixing device. Through the application, suspended matters can be effectively carried to the water surface by micro-bubbles, so that the cleaning and purification are facilitated.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment technology, and more specifically, to an air-water mixing device and an air flotation device. Background Technology

[0002] In the pharmaceutical industry, water quality requirements are high, especially regarding suspended solids such as algae and flocculent matter, which can easily pollute the water and cause wastewater treatment to fail to meet standards. Therefore, water purification is necessary. Existing equipment for treating suspended solids mainly consists of dissolved air flotation (DAF) tanks. DAF tanks require dissolved air devices to generate microbubbles, which adsorb suspended solids and bring them to the surface for removal by scrapers. However, existing aeration and dissolved air devices typically require dissolved air tanks, control cabinets, float level controllers, solenoid valves, and other equipment. They also require high-level installation, making installation cumbersome and difficult, resulting in high investment costs, high failure rates, high maintenance costs, and relatively poor treatment efficiency. Summary of the Invention

[0003] This invention discloses an air-water mixing device and an air flotation device, which are simple in structure and convenient to operate, and are intended to improve the above-mentioned problems.

[0004] The present invention adopts the following solution:

[0005] An air-water mixing device is suitable for installation on the inlet channel of a flotation tank, and the air inlet is suitable for connection to an air source; it includes: an adjustment device, an air vent, and a cyclone device; the air vent connects the cyclone device and the adjustment device; the adjustment device is configured to adjust the amount of air entering the air vent; the cyclone device has a plurality of cyclone channels connected to the air vent, and the cyclone channels are connected to an air outlet located on the outer surface of the cyclone device, each cyclone channel is spirally arranged, and the cyclone device is configured to allow the airflow to form a rotating airflow in the inlet channel after passing through the spiral cyclone channels.

[0006] Furthermore, the cyclone device is configured in the shape of a cone, and the cyclone channels are evenly distributed around the axial direction of the cone.

[0007] Furthermore, the air outlets of each of the cyclone channels are evenly distributed around the axis of the cone and have the same orientation angle.

[0008] Furthermore, the number of cyclone channels is three, and the outlets of the three cyclone channels are located at different heights on the conical surface of the cone.

[0009] Furthermore, the starting angles of the three cyclone channels are staggered by 120°.

[0010] Furthermore, the air outlet is provided with a channel allowance on the conical surface of the cone.

[0011] Furthermore, the regulating device includes a ball valve and a handle, the handle being connected to the ball valve, the ball valve being adapted to control the air intake of the vent pipe.

[0012] Furthermore, the cross-section of the cyclone channel is a circle with the same aperture, and the radius of the circle is... Where m is the water temperature change correction coefficient, C k ρ is the saturated solubility of air in water; P is the inlet water gauge pressure; Q is the saturated solubility of air in water; P is the inlet water gauge pressure; Q is the saturated solubility of air in water; P is the saturated solubility of air in water; Q is the saturated solubility of air in water; P is the inlet water gauge pressure ... r P is the return water volume; k ρ is the pipeline pressure, n is the compressed air density, n is the number of cyclone channels, and π is pi.

[0013] The present invention also provides an air flotation device, including an inlet channel and an air flotation tank, wherein the inlet channel is connected to the air flotation tank, and further includes the aforementioned air-water mixing device, wherein the air-water mixing device is disposed at the inlet channel, and the air vent of the air-water mixing device is connected to an external air source.

[0014] Furthermore, the gas source is connected to a booster device.

[0015] By adopting the above technical solution, the present invention can achieve the following technical effects: by setting an adjustment device for water pressure control and setting multiple spiral cyclone channels, high-pressure gas can form a rotating high-pressure airflow in the cyclone channels, and can divide a large stream of airflow into multiple small streams of high-speed rotating airflow, so that the airflow can rotate and flow in the water when it enters the water, generating more microbubbles, thereby accelerating the mixing with suspended matter and improving the cleaning effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a gas-water mixing device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a cyclone device in an embodiment of the present invention for an air-water mixing device;

[0019] Icons: Adjustment device 1, air pipe 2, cyclone device 3, cyclone channel 31, air outlet 32. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Example

[0026] Combination Figure 1 and Figure 2 As shown, this embodiment provides an air flotation device, including a water inlet channel and an air flotation tank. The water inlet channel is connected to the air flotation tank. It also includes an air-water mixing device, which is installed at the water inlet channel, and the air pipe 2 of the air-water mixing device is connected to an external air source.

[0027] The air-water mixing device is installed on the inlet channel of the flotation tank, and the air inlet is suitable for connecting to an air source; it includes an adjusting device 1, an air pipe 2, and a cyclone device 3; the air pipe 2 connects the cyclone device 3 and the adjusting device 1; the adjusting device 1 is configured to adjust the amount of air entering the air pipe 2; the cyclone device 3 has a plurality of cyclone channels 31 connected to the air pipe 2 inside, and the cyclone channels 31 are connected to the air outlet 32 ​​provided on the outer surface of the cyclone device 3. Each cyclone channel 31 is spirally arranged, and the cyclone device 3 is configured to allow the airflow to form a rotating airflow in the inlet channel after passing through the spiral cyclone channel 31.

[0028] In this embodiment, the flotation tank is an existing device equipped with a scraper to remove debris floating on the water surface. The water inlet channel is a water pipe connected to the flotation tank, used to transport water containing microbubbles into the flotation tank.

[0029] The regulating device 1 includes a ball valve and a handle. The handle is connected to the ball valve, which is adapted to control the air intake of the vent pipe 2. Controlling the gas flow through the ball valve is a conventional switching technology, which will not be elaborated upon here. Through the function of the regulating device 1, the air intake requirements of the device under different flotation tank specifications can be adjusted.

[0030] The vent pipe 2 is used to connect the regulating device 1 and the cyclone device 3. Its main function is to provide a passage for gas, provide support for installation, and serve as a gas transition.

[0031] The cyclone device 3 is disposed inside the water inlet channel to guide airflow into the internal water flow of the water inlet channel. Here, the cyclone device 3 is shaped like a cone, and the cyclone channels 31 are evenly distributed around the axis of the cone. The cross-sectional shape of the cyclone channels 31 is circular, and the air inlets at the ends of the cyclone channels 31 located at the vent pipe 2 can be evenly distributed around the circumference to ensure uniform air output. Here, at least three cyclone channels 31 can be configured. The spiral cyclone channels 31 can disperse the high-speed gas in the vent pipe 2 and form a rotating airflow within the channel, causing the airflow to rotate at a certain angle when it exits the cyclone device 3, thus causing the airflow to rotate in the water. Taking three cyclone channels 31 as an example, the air inlets are designed with initial angles staggered by 120°, evenly distributed, with a pitch height greater than 40mm and less than 70mm, until they penetrate the surface of the cone and rotate clockwise. In a preferred embodiment, the outlets of each cyclone channel 31 are evenly distributed around the axis of the cone and have the same orientation angle. This arrangement allows the gas to be distributed around the axis of the cone, and with the same rotation direction, a stable cyclone flow can be formed, thereby promoting the mixing of gas and water. The angle between the axial direction and the horizontal direction at the outlet 32 ​​can be set to 30° to 60°. This arrangement allows multiple airflows to form a rotating airflow in the same direction in the water, thereby mutually reinforcing each other and forming a waterspout-like effect to improve the gas-water mixing effect. Setting the angle of the outlet 32 ​​allows for a larger range of cyclone effect, further enhancing the gas-water mixing effect. In another embodiment, the outlets 32 of the multiple cyclone channels 31 are located at different heights on the conical surface of the cone, allowing the cyclone device 3 to form cyclones of different diameters on the same axis, further strengthening the waterspout formation of the rotating airflow in the water and improving the microbubble generation effect. Of course, in other embodiments, more cyclone channels 31 can be provided, making the airflow finer and easier to generate microbubbles.

[0032] In another preferred embodiment, the air outlet 32 ​​has a channel allowance on the conical surface of the cone, which extends along the spiral trajectory of the cyclone channel 31. This channel allowance allows the gas exiting the cyclone channel 31 to continue moving along the channel allowance without being dispersed at the outlet, making the airflow trajectory in the water more stable and persistent, further improving the air-water mixing effect.

[0033] In another preferred embodiment, the gas source is connected to a pressurizing device. The gas source is clean gas, and the pressurizing device is adapted to pressurize the gas and deliver it into the gas-water mixing device, so that the gas flowing out of the cyclone device 3 has a certain initial velocity. Here, the gas pressure entering the gas-water mixing device should be higher than 0.35 MPa.

[0034] In this embodiment, the return water flow rate Q is used. r Taking a 10 m³ / h dissolved air flotation (DAF) tank as a reference, the required air compression capacity for the DAF tank can be calculated using the formula Q. k =mC k PQ r To calculate, where: m is the water temperature change correction coefficient, C k Let be the saturated solubility of air in water; P be the inlet gauge pressure; then, under the condition that flow resistance loss is negligible and all pressure energy is converted into kinetic energy, the formula for gas flow velocity is: Among them, P k Let v be the pipe pressure, v be the gas velocity, and ρ be the compressed air density. The formula for the ventilation area is S = Q. k / v can be used to calculate the required size for each aperture.

[0035] Combining the above formulas, we get:

[0036] In this invention, the mixing degree of gas and water is increased by using a gas-water mixing device, which generates enough microbubbles to adsorb suspended matter and causes the suspended matter to rise to the water surface with the bubbles, forming foam scum, which is then scraped off by a scraper.

[0037] Water pressure is controlled by setting an adjustment device 1, and multiple spiral cyclone channels 31 are set up so that high-pressure gas can form a rotating high-pressure airflow in the cyclone channels 31. The large airflow can be divided into multiple small high-speed rotating airflows. When the airflow enters the water, it can rotate and flow in the water, generating more microbubbles, thereby accelerating the mixing with suspended matter and improving the cleaning effect.

[0038] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A gas-water mixing device, which is adapted to be arranged on an inlet channel of a gas floatation tank, and a gas inlet is adapted to be connected to a gas source; characterized in that, Comprise: an adjusting device, an air pipe and a cyclone device; the air pipe connects the cyclone device and the adjusting device; the adjusting device is configured to adjust the amount of air entering the air pipe; the cyclone device is internally provided with a plurality of cyclone channels connected to the air pipe, and the cyclone channels are connected to air outlets arranged on the outer surface of the cyclone device, each of the cyclone channels is arranged in a spiral shape, and the cyclone device is configured to form a rotating air flow in the water inlet channel after the air flow passes through the spiral-shaped cyclone channels; The cyclone device is arranged in a conical shape, the cyclone channels are uniformly distributed around the axis direction of the conical body; the air outlets of each cyclone channel are uniformly distributed around the axis direction of the conical body and have the same angle of orientation; the number of the cyclone channels is three, and the air outlets of the three cyclone channels are located at different heights on the conical surface of the conical body; the air outlets are provided with channel excess on the conical surface of the conical body; the channel cross section of the cyclone channel is a circle with the same aperture, and the radius of the circle is ; wherein, is a water temperature change correction coefficient, is the saturated solubility of air in water; is the inlet water gauge pressure; is the backflow water quantity; is the pipeline pressure, is the compressed air density, is the number of cyclone channels, is the circular constant.

2. The air-water mixing device according to claim 1, characterized by the starting angles of the three cyclone channels are staggered by 120°.

3. The air-water mixing device of claim 1, wherein The adjusting device comprises a ball valve and a handle, the handle is connected to the ball valve, and the ball valve is suitable for controlling the air inlet amount of the air pipe.

4. An air floatation apparatus comprising an inlet channel and an air floatation tank, and the inlet channel is connected to the air floatation tank, characterized in that, Also comprising the air-water mixing device as claimed in claims 1-3, the air-water mixing device is arranged at the water inlet channel, and the air pipe of the air-water mixing device is connected to an external air source.

5. The air floatation apparatus of claim 4, wherein, The air source is connected to a pressure boosting device.

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