Air dissolving device for air flotation machine

Abstract

The utility model provides an air dissolving device for an air flotation machine, which belongs to the technical field of sewage treatment and comprises an air dissolving tank, the air dissolving tank is transversely arranged, two ends of the air dissolving tank are welded with end sockets, and a dissolved air mixing pipe and an emptying port are respectively arranged on the lower surface of the air dissolving tank along the axis direction from left to right. A water outlet is formed in the upper surface of the dissolved air tank in the axis direction, a water inlet is formed in and communicated with the bottom end of the dissolved air mixing pipe, a compressed air inlet is formed in the position, close to the water inlet, of the dissolved air mixing pipe, and a flow guide plate is arranged at the top end of the dissolved air mixing pipe. According to the scheme, operation is convenient and fast, cost and resources are saved, and the gas dissolving and releasing efficiency of the container device is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to an air dissolving device for an air flotation machine. Background Art

[0002] During the physical treatment of sewage, traditional sand filters, screens and other treatment equipment cannot efficiently remove suspended particles, plankton and other substances in the water, while flotation machines can effectively remove suspended particles, foam, microorganisms and other substances.

[0003] Flotation systems use a dissolved air system to generate a large number of fine bubbles in water. These highly dispersed bubbles attach to suspended particles, creating a state less dense than water. Buoyancy allows the particles to float to the surface, achieving solid-liquid separation. This demonstrates the crucial role of dissolved air in flotation systems. Improving their efficiency in dissolving and releasing air can significantly increase the impurity removal rate of the flotation system.

[0004] In pressure dissolved air flotation products, by optimizing the air dissolving device of the flotation machine, the air dissolving efficiency of the flotation machine return water can be significantly improved, thereby achieving better solid-liquid separation of sewage in the flotation machine, floating the suspended matter in the sewage to the water surface, further reducing the suspended matter in the flotation machine outlet water, and improving the suspended ball removal rate of the flotation machine.

[0005] The main function of a dissolved gas device is to dissolve gas in the return water. Its dissolution efficiency refers to the ratio of the actual gas release volume to the theoretical dissolved gas volume when the gas is dissolved in the liquid under certain pressure conditions and all the microbubbles are released and separated.

[0006] The factors that affect the dissolved gas release efficiency of the dissolved gas device are:

[0007] 1. The pressure in the dissolved gas device: the higher the pressure, the greater the amount of dissolved gas;

[0008] 2. Water vapor contact strength;

[0009] 3. Concentration gradient at the interface between water and bubbles. Utility Model Content

[0010] The purpose of the utility model is to provide a dissolved air device for an air flotation machine, which is more convenient to operate, saves costs and resources, and has a higher dissolved air efficiency.

[0011] To achieve the above objectives, the present invention provides the following technical solutions:

[0012] A dissolving air device for an air flotation machine comprises: an air dissolving tank, which is arranged horizontally and welded to a head at both ends of the air dissolving tank, an air dissolving mixing tube and an emptying port are respectively provided on the lower surface of the air dissolving tank along the axial direction from left to right, and a water outlet is provided on the upper surface of the air dissolving tank along the axial direction, the bottom end of the air dissolving mixing tube is installed with and connected to a water inlet, a compressed air inlet is provided on the air dissolving mixing tube near the water inlet, a guide plate is provided on the top of the air dissolving mixing tube, an air supply device is provided in the middle of the air dissolving tank between the water inlet and the water outlet, the inner wall of the air dissolving tank is rotatably connected to a guide auger, a servo motor is installed on one side of the air dissolving tank, and the output shaft of the servo motor is fixedly connected to one end of the guide auger.

[0013] As a preferred solution of the present invention, the dissolved air mixing tube is located at a vertical position on the cross section of the dissolved air tank.

[0014] As a preferred solution of the present invention, the dissolved air mixing tube is closely attached to the inner wall of the dissolved air tank and is arranged along the tangent direction of the inner wall of the dissolved air tank.

[0015] As a preferred solution of the present invention, the included angle between the axis of the guide plate and the dissolved air mixing tube is 45-60 degrees.

[0016] As a preferred solution of the present invention, the distance ratio between the air supply device and the water inlet and the water outlet is 1:1-1:2.

[0017] As a preferred solution of the present invention, the air supply device adopts a T-shaped structure, and air holes are evenly opened on a horizontal tube of the air supply device parallel to the axis of the dissolved air tank, and the air hole diameter is less than 4 mm.

[0018] As a preferred solution of the present invention, the dissolved air tank is composed of an internal anti-corrosion layer, an inner lining body and an outer protective layer from the inside to the outside. The internal anti-corrosion layer is 316 stainless steel, the inner lining body is Q235B carbon steel, and the outer protective layer is an epoxy resin coating.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In this solution, the recycled water passes through the dissolved air mixing pipe before entering the dissolved air tank from the water inlet, allowing the recycled water to initially mix and contact with compressed air, so that the air and recycled water are initially fused under a certain pressure;

[0021] In this solution, the gas-liquid mixed flow continues to move forward into the dissolved air mixing tube. By adjusting the eccentricity between the dissolved air mixing tube and the dissolved air tank and adding a guide plate, the gas-liquid mixed flow is injected into the dissolved air tank at high speed in the form of a jet along the tangential direction of the inner wall of the dissolved air tank. A water outlet is provided at the other end of the dissolved air tank. At the same time, the output shaft of the servo motor rotates to drive the guide auger to rotate, so that the gas-liquid mixed flow forms a high-speed spiral movement in the dissolved air tank. During the high-speed spiral movement, the water-gas contact surface is constantly changing, which is more conducive to further dissolution of the gas into the recycled water.

[0022] In this solution, an air supply device is provided on the inner wall of the dissolved air tank. The device is arranged horizontally along the axial direction, which facilitates the air supply device to cut the gas-liquid mixed flow and replenish the gas in the mixed flow in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0024] In the attached figure:

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0027] Figure 3 This is a left view of the overall structure of the utility model;

[0028] Figure 4 This is a right side view of the overall structure of the utility model;

[0029] Figure 5 It is a top view of the overall structure of the utility model.

[0030] In the figure: 1. dissolved air tank; 2. sealing cover; 3. water outlet; 4. emptying port; 5. dissolved air mixing tube; 6. water inlet; 7. compressed air inlet; 8. guide plate; 9. air supply device; 10. servo motor; 11. guide auger. DETAILED DESCRIPTION

[0031] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention. Example

[0032] See also Figure 1-5 , the technical solutions provided in this embodiment are as follows:

[0033] A dissolved air device for an air flotation machine, comprising: a dissolved air tank 1, a sealing cover 2, a water outlet 3, an emptying port 4, a dissolved air mixing pipe 5, a water inlet 6, a compressed air inlet 7, a guide plate 8 and an air supply device 9. The dissolved air tank 1 is arranged horizontally, and both ends of the dissolved air tank 1 are welded to the sealing cover. The dissolved air tank 1 is provided with a dissolved air mixing pipe 5 and an emptying port 4 on the lower surface along the axial direction from left to right. The dissolved air tank 1 is provided with a water outlet 3 on the upper surface along the axial direction. The dissolved air mixing pipe 5 is provided. The bottom end of the air tank 1 is installed and connected with a water inlet 6, a compressed air inlet 7 is provided on the air mixing pipe 5 near the water inlet 6, a guide plate 8 is provided on the top of the air mixing pipe 5, and an air supply device 9 is provided between the water inlet 6 and the water outlet 3 in the middle of the air dissolving tank 1. The inner wall of the air dissolving tank 1 is rotatably connected to a guide screw dragon 11. A servo motor 10 is installed on one side of the air dissolving tank 1, and the output shaft of the servo motor 10 is fixedly connected to one end of the guide screw dragon 11. The recycled water is passed from the inlet to the outlet. Before the water inlet 6 enters the dissolved air tank 1, it first passes through the dissolved air mixing tube 5, allowing the recycled water to be initially mixed and contacted with the compressed air, so that the air and the recycled water are initially fused under a certain pressure, and the gas-liquid mixed flow continues to move forward into the dissolved air mixing tube 5. By adjusting the eccentricity of the dissolved air mixing tube 5 and the dissolved air tank 1 and adding the guide plate 8, the gas-liquid mixed flow is injected into the dissolved air tank 1 at high speed in the form of a jet along the tangential direction of the inner wall of the dissolved air tank 1. A water outlet 3 is provided at the other end of the dissolved air tank 1. At the same time, the output shaft of the servo motor 10 rotates to drive the guide auger 11 to rotate, so that the gas-liquid mixed flow forms a high-speed spiral movement in the dissolved air tank 1. During the high-speed spiral motion, the water-gas contact surface is constantly changing, which is more conducive to the further dissolution of the gas into the recycled water. On the inner wall of the dissolved air tank 1, an air supply device 9 is provided. The position of the device is arranged horizontally along the axial direction, which is convenient for the air supply device 9 to cut the gas-liquid mixed flow and replenish the gas in the mixed flow in time.

[0034] Specifically, the dissolved air mixing pipe 5 is located at a vertical position on the cross section of the dissolved air tank 1 .

[0035] Specifically, the dissolved air mixing tube 5 is closely attached to the inner wall of the dissolved air tank 1 and is arranged along the tangent direction of the inner wall of the dissolved air tank 1 .

[0036] Specifically, the included angle between the guide plate 8 and the axis of the dissolved gas mixing tube 5 is 45-60 degrees.

[0037] Specifically, the distance ratio between the air supply device 9 and the water inlet 6 and the water outlet 3 is 1:1-1:2.

[0038] Specifically, the air supply device 9 adopts a T-shaped structure. The air supply device 9 is parallel to the axis of the air dissolving tank 1 and has air holes evenly opened on the horizontal tube. The diameter of the air holes is less than 4 mm.

[0039] Specifically, the dissolved air tank 1 is composed of an internal anti-corrosion layer, an inner lining body and an outer protective layer from the inside to the outside. The internal anti-corrosion layer is 316 stainless steel, the inner lining body is Q235B carbon steel, and the outer protective layer is an epoxy resin coating. The service life of the dissolved air tank 1 is increased by the coordinated use of the internal anti-corrosion layer, the inner lining body and the outer protective layer.

[0040] Working principle: before the recycled water enters the air dissolving tank 1 from the water inlet 6, it first passes through the air dissolving mixing tube 5, allowing the recycled water to be initially mixed and contacted with the compressed air, so that the air and the recycled water are initially fused under a certain pressure, and then the gas-liquid mixed flow continues to move forward into the air dissolving mixing tube 5. By adjusting the eccentricity of the air dissolving mixing tube 5 and the air dissolving tank 1 and adding the guide plate 8, the gas-liquid mixed flow is injected into the air dissolving tank 1 at high speed in the form of a jet along the tangential direction of the inner wall of the air dissolving tank 1. A water outlet 3 is provided at the other end of the air dissolving tank 1. At the same time, the output shaft of the servo motor 10 rotates to drive the guide auger 11 to rotate, so that the gas-liquid mixed flow forms a high-speed spiral movement in the air dissolving tank 1. During the high-speed spiral motion, the water-gas contact surface is constantly changing. On the inner wall of the air dissolving tank 1, an air supply device 9 is provided. The position of the device is arranged horizontally along the axial direction, which is convenient for the air supply device 9 to cut the gas-liquid mixed flow and replenish the gas in the mixed flow in time.

[0041] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dissolved air device for an air flotation machine, characterized in that: include: A dissolving gas tank (1) is provided, the dissolving gas tank (1) is arranged horizontally, and both ends of the dissolving gas tank (1) are welded to the head, the lower surface of the dissolving gas tank (1) along the axial direction is provided with a dissolving gas mixing tube (5) and an emptying port (4) from left to right, the upper surface of the dissolving gas tank (1) along the axial direction is provided with a water outlet (3), the bottom end of the dissolving gas mixing tube (5) is installed and connected with a water inlet (6), the dissolving gas mixing tube (5) is provided with a compressed air inlet (7) near the water inlet (6), the top of the dissolving gas mixing tube (5) is provided with a guide plate (8), the middle part of the dissolving gas tank (1) is provided with an air supply device (9) between the water inlet (6) and the water outlet (3), the inner wall of the dissolving gas tank (1) is rotatably connected to a guide auger (11), a servo motor (10) is installed on one side of the dissolving gas tank (1), and the output shaft of the servo motor (10) is fixedly connected to one end of the guide auger (11).

2. The dissolved air device for an air flotation machine according to claim 1, characterized in that: The dissolved air mixing tube (5) is located at a vertical position on the cross section of the dissolved air tank (1).

3. The dissolved air device for an air flotation machine according to claim 1, characterized in that: The dissolved air mixing tube (5) is closely attached to the inner wall of the dissolved air tank (1) and is arranged along the tangent direction of the inner wall of the dissolved air tank (1).

4. The dissolved air device for an air flotation machine according to claim 1, characterized in that: The included angle between the axis of the guide plate (8) and the dissolved air mixing tube (5) is 45-60 degrees.

5. The dissolved air device for an air flotation machine according to claim 1, characterized in that: The distance ratio between the air supply device (9) and the water inlet (6) and the water outlet (3) is 1:1-1:

2.

6. The dissolved air device for an air flotation machine according to claim 5, characterized in that: The air supply device (9) adopts a T-shaped structure. The air supply device (9) is provided with air holes evenly on a horizontal tube parallel to the axis of the air dissolving tank (1), and the air holes have an aperture of less than 4 mm.

7. The dissolved air device for an air flotation machine according to claim 1, characterized in that: The dissolved air tank (1) comprises an internal anti-corrosion layer, an inner lining body and an outer protective layer from the inside to the outside, wherein the internal anti-corrosion layer is 316 stainless steel, the inner lining body is Q235B carbon steel, and the outer protective layer is an epoxy resin coating.

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