Rotary jet type dissolved gas device and gas-water, micro-bubble water mixing system

Abstract

The utility model relates to a kind of rotary jet dissolving gas device and gas-water, micro-bubble water mixing system, including pipe body, first water inlet pipe and first water outlet pipe are respectively arranged on pipe body upper end both sides, first water inlet pipe second end passes through and extends into pipe body, and first water inlet pipe second end is connected rotary jet nozzle;Pipe body side is provided with air inlet assembly, and air inlet assembly includes air inlet pipe and hollow micro-nano membrane core, air inlet pipe first end is connected gas source, second end passes through and extends into pipe body, and hollow micro-nano membrane core is fixed in the second end of air inlet pipe, gas source only needs to provide smaller pressure and air source into hollow micro-nano membrane core generates micro-nano grade bubble, increase the contact area of bubble and water in pipe body, so that air is more easily dissolved in water in pipe body.In addition, since the second end of rotary jet nozzle is set away from air inlet pipe relative to the first end, the bubble on the side of hollow micro-nano membrane core will not be directly impacted by the inflow water, leading to bubble rupture, increase the dissolution amount of air in water, improve the dissolving gas efficiency.

Description

Technical Field

[0001] This utility model relates to the field of dissolved air and dissolved bubble equipment, and in particular to a rotary spray dissolved air device and a gas-water and microbubble water mixing system. Background Technology

[0002] The dissolved air flotation (DAF) unit is a key piece of equipment in pressurized dissolved air flotation water treatment. It uses pressure to fully dissolve air in water to form dissolved air water. A DAF unit typically includes a tank with an inlet pipe, an outlet pipe, and an air inlet pipe. An air inlet device is mounted on the inner wall of the tank, and the air inlet pipe connects to an air inlet plate or a venturi tube. In this type of technology, to meet the dissolved air conditions, air at a pressure ≥0.6 MPa is usually continuously supplied to the air inlet pipe, resulting in very high energy consumption. Furthermore, because the inlet of the water pipe faces the opposite or perpendicular direction to the air inlet direction of the air inlet plate or venturi tube, the disturbance of the incoming water flow actually hinders the diffusion and mixing of air bubbles in the water, reducing the dissolved air efficiency.

[0003] In the teaching reference material titled "Design and Calculation of Wastewater Treatment Structures," edited by Han Hongjun, published by Harbin Institute of Technology Press in March 2005 (2nd edition), page 72 states that "the dissolved gas release device should be able to fully depressurize and dissipate energy to ensure that all dissolved gases in the water are fully released, and should conform to the gas release pattern. It should ensure the fineness of the bubbles, increase the number of bubbles, increase the surface area for adhesion to impurities, and prevent the microbubbles from colliding and expanding, thereby reducing the generation of large-diameter bubbles that are detrimental to the flotation process."

[0004] The above explains that the dissolved air release device is a core and essential component of traditional pressure dissolved air flotation water purification systems. It releases microbubbles from the dissolved air water by reducing pressure and dissipating energy. These tiny bubbles adhere to the surface of suspended solids, achieving solid-liquid separation. Without a dissolved air release device, it is difficult to generate bubbles conducive to flotation. However, after a certain period of use, the dissolved air release device is prone to clogging or crystallization and scaling, requiring regular cleaning, maintenance, or replacement. This disrupts normal production, incurs high maintenance costs, poses safety hazards, and reduces wastewater treatment efficiency.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model discloses a rotary jet dissolved air device and a gas-water and microbubble water mixing system to solve the problems of high energy consumption and low dissolved air efficiency in dissolved air devices.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A rotary spray dissolved air device includes a tube body, which is a hollow structure closed at both ends. A first water inlet pipe and a first water outlet pipe are respectively provided on both sides of the upper end of the tube body. The second end of the first water inlet pipe passes through and extends into the tube body and is connected to a rotary spray nozzle. An air intake assembly is provided on the side of the tube body. The air intake assembly includes an air intake pipe and a hollow micro / nano membrane core. The first end of the air intake pipe is connected to an air source, and the second end passes through and extends into the tube body. The hollow micro / nano membrane core is fixed to the second end of the air intake pipe. The air source pumps air, which sequentially passes through the air intake pipe and the hollow micro / nano membrane core into the water in the tube body, generating micro / nano bubbles and dissolving in the water. The lower end of the rotary spray nozzle is positioned away from the air intake pipe relative to the upper end.

[0009] A further technical solution is that a fixing plate is respectively provided on the side of the hollow micro-nano membrane core near the air inlet pipe and the side away from the air inlet pipe. The fixing plate near the air inlet pipe is fixedly connected to the second end of the air inlet pipe. Air holes are opened on the fixing plate. The periphery of the fixing plate extends outward from the periphery of the hollow micro-nano membrane core. The two fixing plates are bolted together, and several bolts are arranged around the circumference of the hollow micro-nano membrane core.

[0010] A further technical solution is that the hollow micro / nano membrane core is made of PTFE material with a pore size of 0.005~0.01mm, and the pressure provided by the gas source is 0.3~0.5MPa.

[0011] A further technical solution is that a one-way valve, a butterfly valve and a first pressure gauge are sequentially installed on the first water inlet pipe from the front end to the rear end, and the first end of the first water inlet pipe is connected to a return pump.

[0012] A further technical solution is that a second pressure gauge and a shut-off valve are sequentially installed on the first water outlet pipe from the front end to the rear end.

[0013] A further technical solution is that a sampling valve is also provided on the tube body.

[0014] This utility model also discloses an air-water and microbubble water mixing system, which includes a box body. The box body is a hollow structure with the opening facing upwards. The box body is divided into a stirring zone, an air flotation zone, a separation zone, and a water outlet zone from the front end to the rear end by a partition. The stirring zone, air flotation zone, separation zone, and water outlet zone are connected in sequence. The side of the box body is provided with a rotary spray dissolved air device as described above and a return water pipe. The second end of the first water outlet pipe extends into the air flotation zone, the first end of the return water pipe is connected to the water outlet zone, and the second end of the return water pipe is connected to the return pump.

[0015] A further technical solution is as follows: the mixing zone includes: a second inlet pipe disposed on the side of the tank; a mixer disposed on the tank and having a mixing head extending into the mixing zone; the air flotation zone includes: a guide plate connected to the bottom inner side of the tank and inclined towards the separation zone; the separation zone includes: a slag scraper disposed at the upper end of the tank; a slag discharge trough disposed inside the tank, positioned below the rear end of the slag scraper; a sludge discharge trough disposed at the bottom of the tank; a water collection pipe passing through the partition and connecting the separation zone and the water outlet zone at both ends respectively; the water outlet zone includes: a regulating weir connected to the tank; and a second water outlet pipe disposed on the side of the tank.

[0016] The beneficial effects of this utility model embodiment are as follows:

[0017] (a) The rotary spray dissolved air device of this utility model adopts a hollow micro-nano membrane core with smaller pore size. The air source only needs to provide a small pressure to pump air into the hollow micro-nano membrane core to generate micro-nano-scale bubbles, which increases the contact area between the bubbles and the water in the tube, making it easier for the air to dissolve in the water in the tube.

[0018] In addition, this application uses only two fixing plates to fix the hollow micro-nano membrane core. Bubbles can be generated on the side of the hollow micro-nano membrane core away from the air inlet pipe and around the sides. Since the lower end of the vortex nozzle is set away from the air inlet pipe relative to the upper end, that is, the orientation of the vortex nozzle is close to the orientation of the second end of the air inlet pipe, the bubbles on the side of the hollow micro-nano membrane core will not be directly impacted by the incoming water, causing the bubbles to burst. This increases the amount of air dissolved in the water and improves the dissolved air efficiency.

[0019] (ii) Furthermore, in the rotary spray dissolved air device, the dissolved water enters the first outlet pipe. When it passes through the shut-off valve of the first outlet pipe, the flow rate of the dissolved water is adjusted by the shut-off valve to reduce the pressure, so that the dissolved water directly releases bubbles after entering the flotation zone. This avoids the situation where the release device is blocked, eliminates the need for installation and replacement of the release device, saves installation and replacement costs, and avoids safety hazards during the replacement process. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the rotary jet dissolved gas device of this utility model.

[0021] Figure 2 This is a longitudinal sectional view of the rotary jet dissolved air device of this utility model.

[0022] Figure 3 This is a front view structural diagram of the rotary spray dissolved air device of this utility model when connected to an air-water or microbubble water mixing system.

[0023] Figure 4This is a front view structural diagram of the gas-water and microbubble water mixing system of this utility model.

[0024] Figure 5 This is a top view of the air-water and microbubble water mixing system of this utility model.

[0025] In the picture:

[0026] 1. Pipe body; 11. First inlet pipe; 111. First pressure gauge; 112. Check valve; 113. Butterfly valve; 12. Swirl nozzle; 13. First outlet pipe; 131. Second pressure gauge; 132. Shut-off valve; 14. Sampling valve; 15. Flange; 2. Air intake assembly; 21. Air source; 22. Air intake pipe; 23. Hollow micro / nano membrane core; 24. Fixing plate; 241. Bolt; 3. Box body; 4. Mixing zone; 41. Mixer; 42. Second inlet pipe; 5. Air flotation zone; 51. Guide plate; 6. Separation zone; 61. Slag scraper; 62. Slag discharge trough; 63. Sludge discharge trough; 64. Water collection pipe; 7. Water outlet zone; 71. Regulating weir gate; 72. Second outlet pipe; 73. Return water pipe; 8. Return pump. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] First embodiment:

[0029] This embodiment discloses a rotary jet dissolved gas device.

[0030] like Figure 1 and Figure 2 As shown, the rotary jet dissolved air device includes a pipe body 1, which is a hollow structure closed at both ends. A first inlet pipe 11 and a first outlet pipe 13 are respectively installed on both sides of the upper end of the pipe body 1. The second end of the first inlet pipe 11 passes through and extends into the pipe body 1, and is connected to a rotary jet nozzle 12. Exemplarily, flanges 15 are provided at both ends of the pipe body 1. Bolts 241 pass through the flanges 15 and are threaded to the sides of the pipe body 1, fixing the flanges 15 to both sides of the pipe body 1. Preferably, a sealing ring is also provided between the flanges 15 and the pipe body 1 to improve the sealing performance between the flanges 15 and the pipe body 1.

[0031] An air intake assembly 2 is provided on the side of the tube body 1. The air intake assembly 2 includes an air intake pipe 22 and a hollow micro-nano membrane core 23. The first end of the air intake pipe 22 is connected to the air source 21, and the second end passes through and extends into the tube body 1. The hollow micro-nano membrane core 23 is fixed to the second end of the air intake pipe 22. The air source 21 pumps air, and the air enters the water in the tube body 1 through the air intake pipe 22 and the hollow micro-nano membrane core 23 in sequence to generate micro-nano bubbles and dissolve in the water. The lower end of the swirl nozzle 12 is set away from the air intake pipe 22 relative to the upper end.

[0032] In this embodiment and the following text, the first end refers to the end of the pipe near the water inlet direction and the end of the pipe near the air inlet direction, and the second end refers to the end of the pipe near the water outlet direction and the end of the pipe near the air outlet direction. For example... Figure 2 As shown, exemplarily, a fixing plate 24 is respectively provided on the side of the hollow micro-nano membrane core 23 near the air inlet pipe 22 and on the side away from the air inlet pipe 22. The fixing plate 24 near the air inlet pipe 22 is fixedly connected to the second end of the air inlet pipe 22. Air holes are opened on the fixing plate 24. The periphery of the fixing plate 24 extends outwards from the periphery of the hollow micro-nano membrane core 23. The two fixing plates 24 are connected by bolts 241. Several bolts 241 are arranged circumferentially around the hollow micro-nano membrane core 23. The two fixing plates 24 and the bolts 241 form a cavity to accommodate the hollow micro-nano membrane core 23. The air holes on the fixing plate 24 near the air inlet pipe 22 communicate with the second end of the air inlet pipe 22, and the air holes on the fixing plate 24 away from the air inlet pipe 22 communicate with the interior of the tube body 1. The hollow micro-nano membrane core 23 is made of PTFE material with a pore size of 0.005~0.01mm, and the pressure provided by the air source 21 is 0.3~0.5MPa.

[0033] like Figure 3 As shown, further, a one-way valve 112, a butterfly valve 113 and a first pressure gauge 111 are sequentially installed on the first water inlet pipe 11 from the front end to the rear end. The first end of the first water inlet pipe 11 is connected to the return pump 8. The one-way valve 112 prevents backflow of water. The butterfly valve 113 has the advantages of large effective flow area when fully open and quick and labor-saving opening and closing. The first pressure gauge 111 detects the water inlet pressure of the pipe body 1.

[0034] like Figure 3 As shown, further, a second pressure gauge 131 and a shut-off valve 132 are sequentially installed on the first water outlet pipe 13 from the front end to the rear end. The second pressure gauge 131 detects the water outlet pressure of the pipe body 1, and the shut-off valve 132 adjusts the water flow rate and pressure.

[0035] like Figure 1 As shown, a sampling valve 14 is further provided on the pipe body 1 to facilitate water sampling and drainage.

[0036] In this embodiment, by using a hollow micro-nano membrane core 23 with a smaller pore size, the air source 21 only needs to provide a small pressure to pump air into the hollow micro-nano membrane core 23 to generate micro-nano-scale bubbles, which increases the contact area between the bubbles and the water in the tube 1, making it easier for the air to dissolve in the water in the tube 1.

[0037] In addition, this application uses only two fixing plates 24 to fix the hollow micro-nano membrane core 23. Bubbles can be generated on the side of the hollow micro-nano membrane core 23 away from the air inlet pipe 22 and around the sides. Since the second end of the swirl nozzle 12 is set away from the air inlet pipe 22 relative to the first end, that is, the orientation of the swirl nozzle 12 is close to the orientation of the second end of the air inlet pipe 22, the bubbles on the side of the hollow micro-nano membrane core 23 will not be directly impacted by the incoming water, causing the bubbles to break. This increases the amount of air dissolved in the water and improves the dissolved air efficiency.

[0038] Second embodiment:

[0039] This embodiment discloses an air-water and microbubble water mixing system.

[0040] like Figure 4 and Figure 5 As shown, the air-water and microbubble water mixing system includes a box 3, which is a hollow structure with the opening facing upward. The box 3 is divided into a stirring zone 4, an air flotation zone 5, a separation zone 6 and a water outlet zone 7 from the front end to the rear end by a partition. The stirring zone 4, the air flotation zone 5, the separation zone 6 and the water outlet zone 7 are connected in sequence.

[0041] The side of the housing 3 is provided with a rotary spray dissolved air device and a return water pipe 73 as in the first embodiment. The second end of the first outlet pipe 13 extends into the air flotation zone 5. The first end of the return water pipe 73 is connected to the outlet zone 7, and the second end of the return water pipe 73 is connected to the return pump 8.

[0042] like Figure 4 and Figure 5 As shown, the mixing zone 4 further includes a second water inlet pipe 42 and a mixer 41. The second water inlet pipe 42 is disposed on the side of the housing 3. The mixer 41 is disposed on the housing 3, and its lower end has a mixing head extending into the mixing zone 4.

[0043] The air flotation zone 5 includes a guide plate 51. The guide plate 51 is connected to the bottom of the inner side of the housing 3 and is inclined toward the separation zone 6.

[0044] Separation zone 6 includes a slag scraper 61, a slag discharge trough 62, a sludge discharge trough 63, and a water collection pipe 64. The slag scraper 61 is located at the upper end of the housing 3. The slag discharge trough 62 is located inside the housing 3, positioned below the rear end of the slag scraper 61. The sludge discharge trough 63 is located at the bottom of the housing 3. The water collection pipe 64 passes through a partition, connecting the separation zone 6 and the effluent zone 7 at both ends.

[0045] The outlet section 7 includes a regulating weir 71 and a second outlet pipe 72. The regulating weir 71 is connected inside the housing 3. The second outlet pipe 72 is located on the side of the housing 3.

[0046] In this embodiment, the dissolved water in the rotary spray dissolved air device enters the first outlet pipe 13. When it passes through the shut-off valve 132 of the first outlet pipe 13, the flow rate of the dissolved water is adjusted by the shut-off valve 132 to reduce the pressure, so that the dissolved water directly releases bubbles after entering the air flotation zone 5. This avoids the situation where the release device is blocked, eliminates the need for installation and replacement of the release device, saves installation and replacement costs, and avoids safety hazards during the replacement process.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A rotary jet dissolved gas device, characterized in that, The rotary spray dissolved air device includes a tube body (1), which is a hollow structure closed at both ends. A first water inlet pipe (11) and a first water outlet pipe (13) are respectively provided on both sides of the upper end of the tube body (1). The second end of the first water inlet pipe (11) passes through and extends into the tube body (1), and the second end of the first water inlet pipe (11) is connected to the rotary spray nozzle (12). An air intake assembly (2) is provided on the side of the tube body (1). The air intake assembly (2) includes an air intake pipe (22) and a hollow micro / nano membrane. The core (23) is connected to the air source (21) at the first end of the air inlet pipe (22), and the second end passes through and extends into the tube body (1). The hollow micro-nano membrane core (23) is fixed to the second end of the air inlet pipe (22). The air source (21) pumps air, and the air passes through the air inlet pipe (22) and the hollow micro-nano membrane core (23) in sequence to enter the water in the tube body (1) to generate micro-nano bubbles and dissolve in water. The lower end of the swirl nozzle (12) is set away from the air inlet pipe (22) relative to the upper end.

2. The rotary jet dissolved gas device according to claim 1, characterized in that: The hollow micro-nano membrane core (23) has a fixing plate (24) on the side close to the air inlet pipe (22) and the side away from the air inlet pipe (22). The fixing plate (24) close to the air inlet pipe (22) is fixedly connected to the second end of the air inlet pipe (22). The fixing plate (24) has air holes. The fixing plate (24) extends out of the outer periphery of the hollow micro-nano membrane core (23). The two fixing plates (24) are connected by bolts (241). Several bolts (241) are arranged around the hollow micro-nano membrane core (23) circumferentially.

3. The rotary jet dissolved gas device according to claim 1, characterized in that: The hollow micro-nano membrane core (23) is made of PTFE material with a pore size of 0.005~0.01mm, and the pressure provided by the gas source (21) is 0.3~0.5MPa.

4. The rotary jet dissolved gas apparatus according to any one of claims 1 to 3, characterized in that: A one-way valve (112), a butterfly valve (113) and a first pressure gauge (111) are sequentially installed on the first water inlet pipe (11) from front end to rear end. The first end of the first water inlet pipe (11) is connected to a return pump (8).

5. The rotary jet dissolved gas device according to claim 4, characterized in that: A second pressure gauge (131) and a shut-off valve (132) are installed sequentially from the front end to the rear end on the first water outlet pipe (13).

6. The rotary jet dissolved gas device according to claim 5, characterized in that: A sampling valve (14) is also provided on the tube body (1).

7. A gas-water and microbubble water mixing system, characterized in that, The air-water and microbubble water mixing system includes a box (3), which is a hollow structure with the opening facing upward. The box (3) is divided into a stirring zone (4), an air flotation zone (5), a separation zone (6) and a water outlet zone (7) from the front end to the rear end by a partition. The stirring zone (4), the air flotation zone (5), the separation zone (6) and the water outlet zone (7) are connected in sequence. The side of the box (3) is provided with a rotary spray dissolved air device as described in claim 5 or 6 and a return water pipe (73). The second end of the first water outlet pipe (13) extends into the air flotation zone (5). The first end of the return water pipe (73) is connected to the water outlet zone (7), and the second end of the return water pipe (73) is connected to the return pump (8).

8. The air-water and microbubble water mixing system according to claim 7, characterized in that, The stirring zone (4) includes: The second water inlet pipe (42) is located on the side of the box body (3); A mixer (41) is mounted on the housing (3) and has a mixing head extending into the mixing zone (4); The air flotation zone (5) includes: A guide plate (51) is connected to the bottom of the inner side of the box (3) and is inclined toward the separation zone (6); The separation zone (6) includes: A slag scraper (61) is installed at the upper end of the housing (3); The slag discharge trough (62) is located inside the box (3) and is positioned below the rear end of the slag scraper (61); A mud discharge trough (63) is provided at the bottom of the box body (3); A water collection pipe (64) is installed through the partition, with its two ends connected to the separation zone (6) and the water outlet zone (7), respectively. The outlet zone (7) includes: The regulating weir gate (71) is connected inside the box body (3); The second water outlet pipe (72) is located on the side of the box body (3).

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