Horizontal pressure dissolved air tank for air flotation machine

Abstract

The utility model provides a horizontal pressure dissolved air tank for an air flotation machine, which comprises a dissolved air tank body, a jet device, a mixer, a guide elbow, a dissolved air tank body, an air inlet electromagnetic valve, a pressure release valve, a pressure gauge, a floating ball liquid level meter, a water distribution plate I, a water distribution plate II, a water distribution plate III, a filler area and a saddle type support, the jet device comprises a water inlet, a nozzle, a shrinkage pipe, a throat pipe and a diffuser pipe, the right end of the nozzle is funnel-shaped, the outer wall of the nozzle is fixedly connected to the interior of the left side of the shrinkage pipe, the outer wall of the shrinkage pipe is fixedly connected to the left end of the interior of the dissolved air tank body, and the right end of the shrinkage pipe is in through connection with the throat pipe; the right end of the throat pipe is connected with a diffuser pipe in a penetrating mode, the outer wall of the diffuser pipe is connected with a mixer in a penetrating mode, the right end of the mixer is connected with a guide elbow in a penetrating mode, impact of dissolved air water on the dissolved air tank body is avoided, energy consumption is reduced, and meanwhile liquid level fluctuation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure dissolved air tanks, in particular to a horizontal pressure dissolved air tank used for an air flotation machine. Background Art

[0002] Flotation separation technology involves mixing air and water under a specific operating pressure to maximize the dissolution of gas into the water, striving for saturation. The resulting pressurized dissolved air is then released through reduced pressure, generating a large number of tiny bubbles that come into contact with suspended flocs in the water. These bubbles adhere to the microbubbles and float to the surface along with the bubbles, forming a scum that is then scraped off, thereby purifying the water. Flotation equipment consists of a flotation tank, a pressure-dissolved air tank, a dissolved air return line, a dissolved air release device, a scum scraper, and an electrical control cabinet. The pressure-dissolved air tank is a key component of the pressure-dissolved air flotation purification process. Compressed air and pressurized water dissolve in the tank through diffusion, dissolution, and mass transfer, dissolving large amounts of air into the water. Horizontal pressure-dissolved air tanks are widely used in wastewater treatment due to their high dissolution efficiency and compact size.

[0003] The conventional horizontal pressure dissolved gas tank on the market has a simplified structural diagram as follows: Figure 1 Water enters from the end and exits from the bottom. It has a built-in ejector. It uses the ejector principle to dissolve air in water. The dissolved air water after passing through the ejector is directly ejected to the end of the dissolved air tank. This method usually has the following disadvantages: 1. Fluctuation of the liquid level of the float ball in the dissolved air tank. Although some structural design improvements have added baffles, the liquid level in the container still fluctuates due to the impact of water vapor. As a result, the air compressor is frequently started and the equipment is easily damaged. 2. The air in the dissolved air tank easily flows out of the water outlet along with the dissolved air water and enters the dissolved air release device, forming large bubbles, which reduces the dissolved air effect. For this reason, a horizontal pressure dissolved air tank for flotation machine is proposed. Utility Model Content

[0004] In view of this, the present invention provides a horizontal pressure dissolved air tank for a flotation machine to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0005] The technical solution of the embodiment of the utility model is achieved as follows: a horizontal pressure dissolved air tank for an air flotation machine, comprising a dissolved air tank body, an ejector, a mixer, a guide elbow, a dissolved air tank body, an air inlet solenoid valve, a pressure relief valve, a pressure gauge, a float level gauge, a water distribution plate 1, a water distribution plate 2, a water distribution plate 3, a filling area and a saddle support, wherein the ejector is provided on the left side of the dissolved air tank body;

[0006] The ejector includes a water inlet, a nozzle, a contraction tube, a throat and a diffuser. The left end of the air dissolving tank body is provided with a water inlet opened by the ejector, the right side of the water inlet is connected with a nozzle, the right end of the nozzle is set to a funnel shape, the outer wall of the nozzle is fixedly connected to the left inside of the contraction tube, the outer wall of the contraction tube is fixedly connected to the inner left end of the air dissolving tank body, the right end of the contraction tube is connected with a throat, the right end of the throat is connected with a diffuser, the outer wall of the diffuser is connected with a mixer, and the right end of the mixer is connected with a guide elbow.

[0007] Further preferably, the ejector further comprises a vacuum zone and an air inlet, the top end of the contraction tube is provided with the air inlet, and a vacuum zone is provided between the contraction tube, the air inlet and the top end of the nozzle.

[0008] Further preferably, the outer wall of the throat is sleeved with a baffle, and a water distribution plate three is provided in the middle of the baffle in parallel with the pressure dissolved gas tank body, the water distribution plate three is located at the bottom end of the throat, and the other end of the water distribution plate three is provided at the bottom end of the diffuser tube.

[0009] Further preferably, the water distribution plate three is fixedly connected to the inner bottom end of the air dissolving tank body, and is fixedly connected to the water distribution plate two and the water distribution plate one from left to right in sequence. A filling area is provided between the water distribution plate three, the water distribution plate two and the water distribution plate one. The air dissolving tank body is provided with an inspection port inside the filling area, and the water distribution plate one and the water distribution plate two are arranged at an angle.

[0010] Further preferably, the bottom end of the air dissolving tank body is fixedly connected to two saddle-type brackets, and the bottom end of the air dissolving tank body is provided with a water outlet on the left side of the left saddle-type bracket.

[0011] Further preferably, a float level gauge is provided at the top of the rear end of the dissolved air tank body, and a pressure gauge, a pressure relief valve and a solenoid valve are provided at the top of the dissolved air tank body in sequence from left to right, and a compressed air inlet is provided at the bottom end of the solenoid valve, and the compressed air inlet is provided at the top of the dissolved air tank body.

[0012] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0013] One or three gas dissolving processes (ejector gas dissolving, mixer gas dissolving, filler gas dissolving) with high gas dissolving efficiency;

[0014] 2. The guide elbow avoids the impact of dissolved air water on the dissolved air tank body, reduces energy consumption and reduces liquid level fluctuations;

[0015] 3. The water distribution plate 1 and the water distribution plate 2 are arranged at an angle, which increases the number of through holes in the water distribution plates and reduces the pressure drop of water vapor passing through.

[0016] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 It is a background technology structure diagram;

[0019] Figure 2 This is a cross-sectional structural diagram of the internal structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the interior of the utility model from another angle;

[0021] Figure 4 This is a schematic diagram of the ejector of the utility model;

[0022] Figure 5 This is a front view structural diagram of the air dissolving tank body of the utility model;

[0023] Figure 6 This is a top view structural diagram of the dissolved air tank body of the utility model;

[0024] Figure 7 This is a side view structural diagram of the dissolved air tank body of the utility model.

[0025] Figure numerals: 1. Dissolved air tank body; 2. Ejector; 21. Water inlet; 22. Nozzle; 23. Contraction tube; 24. Throat; 25. Diffuser; 26. Vacuum area; 27. Air inlet; 3. Water outlet; 4. Saddle support; 5. Filler; 6. Mixer; 7. Guide elbow; 8. Float level gauge; 9. Baffle; 10. Pressure gauge; 11. Pressure relief valve; 12. Solenoid valve; 13. Compressed air inlet; 14. Water distribution plate 1; 15. Water distribution plate 2; 16. Inspection port; 17. Water distribution plate 3. DETAILED DESCRIPTION

[0026] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] Example

[0029] like Figure 2-Figure 7 As shown, the embodiment of the utility model provides a horizontal pressure dissolved air tank for an air flotation machine, comprising a dissolved air tank body 1, an ejector 2, a mixer 6, a guide elbow 7, a dissolved air tank body 1, an air inlet solenoid valve 12, a pressure relief valve 11, a pressure gauge 10, a float level gauge 8, a water distribution plate 14, a water distribution plate 2 15, a water distribution plate 3 17, a filling area 5 and a saddle support 4. The ejector 2 is provided on the left side of the dissolved air tank body 1;

[0030] The ejector 2 includes a water inlet 21, a nozzle 22, a contraction tube 23, a throat 24 and a pressure diffuser 25. The left end of the dissolved air tank body 1 is provided with the water inlet 21 opened by the ejector 2, and the right side of the water inlet 21 is connected with the nozzle 22. The right end of the nozzle 22 is set to a funnel shape. The outer wall of the nozzle 22 is fixedly connected to the left inner side of the contraction tube 23, and the outer wall of the contraction tube 23 is fixedly connected to the inner left end of the dissolved air tank body 1. The right end of the contraction tube 23 is connected with the throat 24, and the right end of the throat 24 is connected with the pressure diffuser 25. The outer wall of the pressure diffuser 25 is connected with the mixer 6, and the right end of the mixer 6 is connected with the guide elbow 7. The dissolved air water and the undissolved air further enter the pipeline mixer 6. In the mixer 6, the water gas mixes, and the reaction time is prolonged. The undissolved air is further dissolved in the water. After leaving the mixer 6, the dissolved air water enters the dissolved air tank through the guide elbow 7. The guide elbow 7 prevents the dissolved air water from directly impacting the dissolved air tank body 1, thereby reducing energy loss.

[0031] In one embodiment, specifically, the ejector 2 also includes a vacuum zone 26 and an air inlet 27. The air inlet 27 is provided through the top of the contraction tube 23. A vacuum zone 26 is provided between the contraction tube 23, the air inlet 27 and the top of the nozzle 22. As the flow rate increases and the pressure decreases, the surrounding gas is extracted to form a vacuum zone 26, and air continuously enters the ejector 2 through the air inlet 27.

[0032] In one embodiment, specifically, the outer wall of the throat pipe 24 is sleeved with a baffle 9, and a water distribution plate 3 17 is provided in the middle of the baffle 9 at a position horizontally parallel to the pressure dissolved air tank body 1. The water distribution plate 3 17 is located at the bottom end of the throat pipe 24, and the other end of the water distribution plate 3 17 is provided at the bottom end of the diffuser 25. The air is mixed and dissolved in the throat pipe 24 and the diffuser 25 of the ejector 2 to form dissolved air water.

[0033] In one embodiment, specifically, the water distribution plate 3 17 is connected to the inner bottom end of the dissolved air tank body 1, and is fixedly connected to the water distribution plate 2 15 and the water distribution plate 1 14 from left to right in sequence. A filling area is provided between the water distribution plate 3 17, the water distribution plate 2 15 and the water distribution plate 1 14. The dissolved air tank body 1 is provided with an inspection port 16 inside the filling area. The water distribution plate 1 14 and the water distribution plate 2 15 are arranged at an angle. The dissolved air water that eventually tends to be saturated passes through the water distribution plate 2 15 and enters the dissolved air release device of the flotation system from the water outlet 3. The filling area 5 is provided with an inspection port 16 for replacing and filling the filler. The water distribution plates 14 and 2 are arranged at an angle, which can increase the number of through holes in the water distribution plates and reduce the pressure drop of water vapor passing through.

[0034] In one embodiment, specifically, the bottom end of the gas dissolving tank body 1 is fixedly connected to two saddle-type brackets, and the bottom end of the gas dissolving tank body 1 is provided with a water outlet 3 on the left side of the left saddle-type bracket.

[0035] In one embodiment, specifically, a float level gauge 8 is provided at the top of the rear end of the gas dissolving tank body 1, and a pressure gauge 10, a pressure relief valve 11 and a solenoid valve 12 are provided at the top of the gas dissolving tank body 1 in sequence from left to right. A compressed air inlet 13 is provided at the bottom of the solenoid valve 12, and the compressed air inlet 13 is provided at the top of the gas dissolving tank body 1. A baffle is also provided in the pressure gas dissolving tank, which reduces the impact of compressed air and mixed gas and water on the float level gauge 8, thereby avoiding the frequent start and stop of the air inlet solenoid valve 12 of the gas dissolving tank caused by liquid level fluctuations. Usually, the design pressure of the pressure gas dissolving tank is 8 Bar. In order to avoid the risk of explosion, the gas dissolving tank is provided with a safe and reliable pressure relief valve 11. When the pressure exceeds a certain set value, the pressure relief valve 11 opens. A pressure gauge 10 is also provided for debugging, inspection, etc. The operating status of the entire pressure gas dissolving tank can be understood through the value of the pressure gauge 10.

[0036] When the utility model is working, the first dissolved air process is as follows: the reflux pressure pump of the flotation machine pressurizes the reflux water and then enters the water inlet 21 of the ejector 2. When the fluid is ejected into the contraction tube 23 through the nozzle 22, the flow rate increases and the pressure decreases, so that the surrounding gas is extracted to form a vacuum area 26. The air continuously enters the ejector 2 from the air inlet 27, and is mixed and dissolved in the throat 24 and the diffuser 25 of the ejector 2 to form dissolved air water.

[0037] Second air dissolution process: The dissolved air and undissolved air further enter the pipeline mixer 6. Inside the mixer 6, the water and air mix, and the reaction time is extended. The undissolved air further dissolves in the water. After leaving the mixer 6, the dissolved air enters the air dissolving tank through the guide elbow 7. The guide elbow 7 prevents the dissolved air from directly impacting the air dissolving tank body 1, reducing energy loss.

[0038] During the third air dissolution process, the float level gauge 8 controls the liquid level in the pressure air dissolution tank to a level higher than water distribution plate 14 and water distribution plate 3 17. Above the liquid surface, the liquid comes into contact with the compressed air above. Under pressure, the air above also dissolves in the water. The dissolved water and undissolved air pass through water distribution plates 14 and 3 17 and enter the ball ring packing area 5. Ball ring packing has advantages such as high flux, low resistance, high separation efficiency, and large surface area. This enhances the diffusion, dissolution, and mass transfer processes of air in the air dissolution tank, causing a large amount of air to dissolve in the water. Ultimately, the saturated dissolved air passes through water distribution plate 2 15 and enters the dissolved air release device of the flotation system through outlet 3. The packing area 5 is equipped with an inspection port 16 for packing replacement and filling. Water distribution plates 14 and 2 are arranged at an angle to increase the number of through-holes in the water distribution plates and reduce the pressure drop of water vapor passing through. The pressure air dissolution tank is equipped with a float level gauge 8 to control the working liquid level and the inflow and outflow of compressed air. Specifically: 1. When the liquid level of the dissolved air tank is high, the compressed air solenoid valve 12 is opened and compressed air enters the dissolved air tank; 2. When the liquid level of the dissolved air tank is low, the compressed air solenoid valve 12 is closed and the air supply to the dissolved air tank is stopped, and so on.

[0039] The pressure gas tank is also equipped with a baffle, which reduces the impact of compressed air and the gas-water mixture on the float level gauge 8, preventing the frequent starting and stopping of the tank's air inlet solenoid valve 12 due to liquid level fluctuations. The pressure of the pressure gas tank is typically designed for 8 bar. To prevent the risk of explosion, the tank is equipped with a safe and reliable pressure relief valve 11, which opens when the pressure exceeds a set value. A pressure gauge 10 is also provided for debugging and inspection. The reading on the pressure gauge 10 can be used to monitor the operating status of the entire pressure gas tank.

[0040] The horizontal dissolved air tank is equipped with a standard saddle support 4, which allows the dissolved air tank to be easily installed on the flotation device.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A horizontal pressure dissolved air tank for an air flotation machine, comprising a dissolved air tank body (1), an ejector (2), a mixer (6), a guide elbow (7), a dissolved air tank body (1), an air inlet solenoid valve (12), a pressure relief valve (11), a pressure gauge (10), a float level gauge (8), a first water distribution plate (14), a second water distribution plate (15), a third water distribution plate (17), a filler area (5) and a saddle support (4), characterized in that: An ejector (2) is provided on the left side of the interior of the gas dissolving tank body (1); The ejector (2) comprises a water inlet (21), a nozzle (22), a contraction tube (23), a throat (24) and a pressure diffuser (25). The left end of the air dissolving tank body (1) is provided with a water inlet (21) opened by the ejector (2). The right side of the water inlet (21) is connected to the nozzle (22). The right end of the nozzle (22) is arranged in a funnel shape. The outer wall of the nozzle (22) is fixedly connected to the left inner side of the contraction tube (23). The outer wall of the contraction tube (23) is fixedly connected to the left inner end of the air dissolving tank body (1). The right end of the contraction tube (23) is connected to the throat (24). The right end of the throat (24) is connected to the pressure diffuser (25). The outer wall of the pressure diffuser (25) is connected to the mixer (6). The right end of the mixer (6) is connected to the guide elbow (7).

2. A horizontal pressure dissolved air tank for an air flotation machine according to claim 1, characterized in that: The ejector (2) further comprises a vacuum zone (26) and an air inlet (27); the air inlet (27) is provided through the top end of the contraction tube (23); and a vacuum zone (26) is provided between the contraction tube (23), the air inlet (27) and the top end of the nozzle (22).

3. The horizontal pressure dissolved air tank for an air flotation machine according to claim 1, characterized in that: The outer wall of the throat pipe (24) is sleeved with a baffle (9), and a water distribution plate (17) is provided in the middle of the baffle (9) in parallel with the pressure gas tank body (1). The water distribution plate (17) is located at the bottom end of the throat pipe (24), and the other end of the water distribution plate (17) is provided at the bottom end of the diffuser pipe (25).

4. A horizontal pressure dissolved air tank for an air flotation machine according to claim 3, characterized in that: The water distribution plate 3 (17) is fixedly connected to the inner bottom end of the air dissolving tank body (1) and is sequentially fixedly connected to the right water distribution plate 2 (15) and the water distribution plate 1 (14) from left to right. A filling area is provided between the water distribution plate 3 (17), the water distribution plate 2 (15) and the water distribution plate 1 (14). The air dissolving tank body (1) is provided with an inspection port (16) inside the filling area. The water distribution plate 1 (14) and the water distribution plate 2 (15) are arranged obliquely.

5. The horizontal pressure dissolved air tank for a flotation machine according to claim 1, characterized in that: The bottom end of the gas dissolving tank body (1) is fixedly connected to two saddle-type brackets, and the bottom end of the gas dissolving tank body (1) is provided with a water outlet (3) on the left side of the left saddle-type bracket.

6. The horizontal pressure dissolved air tank for a flotation machine according to claim 1, characterized in that: A float level gauge (8) is provided at the top of the rear end of the gas dissolving tank body (1); a pressure gauge (10), a pressure relief valve (11) and a solenoid valve (12) are provided at the top of the gas dissolving tank body (1) in sequence from left to right; a compressed air inlet (13) is provided at the bottom end of the solenoid valve (12); and the compressed air inlet (13) is provided at the top of the gas dissolving tank body (1).

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