Seawater purification pretreatment device adopting air flotation method

Abstract

The invention belongs to the technical field of seawater purification, and particularly relates to an air flotation seawater purification pretreatment device which comprises a flocculant mixing tank and an air flotation tank mounted on one side of the flocculant mixing tank, a coagulant mixing tank is arranged at one end of the flocculant mixing tank, and an observation box is mounted on one side of the air flotation tank. The upper end face of the observation box is rotationally connected with a sealing cover, the sealing cover is made of an acrylic plate, one side of the upper end face of the air floatation tank is fixedly connected with an L-shaped guide plate, and a slag scraping assembly is arranged in an inner cavity of the air floatation tank. The problems that pollutants generated in seawater have certain viscidity, a small amount of pollutants are attached to the surface of slag scraping equipment, and after the slag scraping equipment rotates by a circle, a small amount of pollutants attached to the surface of the slag scraping equipment return to the seawater again, so that the overall treatment efficiency is reduced are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of seawater purification, in particular to an air flotation method seawater purification pretreatment device. Background Art

[0002] Flotation method for seawater purification pretreatment refers to the use of an air pump or compressed air tank to pressurize air or oxygen and then inject it into seawater, so that it forms highly dispersed tiny bubbles in the seawater, and acts as a carrier to adhere to suspended matter such as pollutants in the seawater, making its buoyancy greater than gravity and floating resistance, so that the pollutants float to the surface of the seawater, forming a scum layer, and then use scraping equipment to scrape the scum layer on the surface of the seawater for cleaning and collection, so as to achieve the effect of pretreatment of seawater. The seawater pretreated by flotation method needs to undergo dual-media filtration, disinfection filtration and desalination treatment before it can meet the needs of use.

[0003] A patent with the publication number CN217895335U discloses a device for treating seawater sewage by multi-point synergistic action of flotation and advanced oxidation. The solution adds an ozone doser on the inlet pipe of the flotation reflux pump to continuously and dispersely add ozone to the reflux water. The ozone enters the pressure dissolved gas tank along with the water flow. Under the action of the external pressure, the ozone is dissolved in the water and reaches a supersaturated state. Then, it is released by the dissolved gas releaser and mixed with the influent water. The supersaturated ozone is precipitated from the water under a reduced pressure state to form microbubbles. While realizing the separation function of flotation, the ozone oxidizes and degrades the dissolved organic matter in the water. A nano ozone releaser is provided to release the ozone into the water in the form of a micro steam bag. The ozone is fully mixed with the water during the floating process and a part of the ozone is integrated into the water, which can realize secondary solid-liquid separation and degrade the organic matter again, further purifying the sewage. A high-efficiency rotary mixing oxidation reactor is added to the effluent part to further degrade the organic matter in the water, realize deep treatment, and achieve high-standard effluent water quality.

[0004] The above-mentioned prior art still has some problems in practical application. When scraping pollutants floating on the water surface, the scraping equipment usually uses a roller or scraper with a convex plate to scrape the pollutants on the surface of the seawater. However, since the pollutants generated inside the seawater have a certain viscosity, a small amount of pollutants will adhere to the surface of the scraping equipment. After the scraping equipment rotates one circle, the small amount of pollutants adhered to the surface of the scraping equipment returns to the seawater again, resulting in a decrease in the overall treatment efficiency.

[0005] To this end, the present invention provides a seawater purification pretreatment device using an air flotation method. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the flotation method seawater purification pretreatment device described in the present invention comprises a flocculant mixing tank and an air flotation tank installed on one side of the flocculant mixing tank, and a coagulant mixing tank is arranged at one end of the flocculant mixing tank, and an observation box is installed on one side of the air flotation tank, the upper end surface of the observation box is rotatably connected with a sealing cover, and the sealing cover is made of acrylic plate, an L-shaped guide plate is fixedly connected to one side of the upper end surface of the air flotation tank, and a scraping assembly is arranged in the inner cavity of the air flotation tank; The scraper assembly includes a transmission shaft rotatably arranged in the inner cavity of the flotation tank, the transmission shaft is externally connected to a plurality of rotating belts, and a mounting block is rotatably arranged between every two rotating belts, one end of the mounting block is fixedly connected to a scraper, and the scraper is L-shaped and used to scrape pollutants; A plurality of air guide tubes are arranged at the bottom of the inner cavity of the flotation pool, and a plurality of air holes are arranged outside the plurality of air guide tubes for discharging pressurized air. A plurality of baffles are installed in the inner cavity of the flotation pool, and the plurality of baffles are successively increased in height from left to right, for guiding the flow direction of seawater and reducing the flow rate of seawater.

[0008] Preferably, a servo motor is installed on the upper end surface of the flocculant mixing tank, a transmission pulley is fixedly connected to the output shaft end of the servo motor, a stirring frame is fixedly connected to the lower end of the transmission pulley, and the stirring frame is arranged in the inner cavity of the flocculant mixing tank, the transmission pulley is externally connected to a belt, one end of the belt is transmission-connected to a driven pulley, and an air pressurization component is arranged at the lower end of the driven pulley.

[0009] Preferably, the air pressurizing component includes a pressurizing chamber opened inside one side of the flocculant mixing tank, a partition plate is provided in the pressurizing chamber, a plurality of air vents are provided on the upper end surface of the partition plate, and a one-way valve is provided in the inner cavity of the plurality of air vents, and the one-way valve can only be flipped open toward the bottom of the pressurizing chamber, a catheter is fixedly connected to the bottom of the inner cavity of the pressurizing chamber, and one end of the catheter is connected to the air guide tube, a one-way valve is provided in the inner cavity of the catheter, and the one-way valve can only be flipped open toward the inner cavity of the air guide tube.

[0010] Preferably, a screw is rotatably connected to the inner side of the upper end surface of the dividing plate, the upper end of the screw is fixedly connected to the driven pulley, the outer thread of the screw is connected to a piston plate, a one-way valve is provided in the piston plate, and the one-way valve can only be flipped open toward the upper wall of the pressurizing chamber, two limit columns are fixedly connected to the upper end surface of the dividing plate, and the piston plate is slidably arranged outside the limit columns, two air intake pipes are fixedly connected to one side of the upper end surface of the flocculant mixing tank, and the two air intake pipes are both connected to the pressurizing chamber, and the inner cavity of the air intake pipes is provided with a filter element.

[0011] Preferably, a connecting port is provided on the inner wall of the flocculant mixing tank, and the inner cavity of the flocculant mixing tank is connected with the coagulant mixing tank through the connecting port, and the connecting port is opened at a position higher than the right wall of the inner cavity of the flocculant mixing tank, a flocculant storage cylinder is installed on the upper end surface of the flocculant mixing tank, a discharge port is provided at the bottom of the inner cavity of the flocculant storage cylinder, and an electromagnetic valve is provided in the inner cavity of the discharge port, and the inner cavity of the flocculant storage cylinder is connected with the inner cavity of the flocculant mixing tank through the discharge port.

[0012] Preferably, a seawater driving assembly is installed on the upper end surface of the coagulant mixing tank, and the seawater driving assembly includes a threaded pipe installed on the upper end surface of the coagulant mixing tank, a rotating shaft is rotatably connected to the middle part of the inner cavity of the threaded pipe, and an impeller is arranged outside the inner cavity of the threaded pipe, a water inlet is arranged at one end of the threaded pipe, a connecting port is opened in the middle part of the inner cavity of the threaded pipe, and the connecting port is connected to the inner cavity of the coagulant mixing tank.

[0013] Preferably, the upper end surface of the threaded pipe is fixedly connected to a coagulant storage cylinder, a discharge port is provided at the bottom of the inner cavity of the coagulant storage cylinder, and the discharge port is connected to the inner cavity of the threaded pipe, one end of the rotating shaft passes through the coagulant storage cylinder and is fixedly connected to a stirring rod, the rotating shaft is located outside the inner cavity of the coagulant storage cylinder and is fixedly connected to a discharge blade, and the discharge blade is used to control the amount of coagulant discharged, and the rotating shaft is located outside the inner cavity of the coagulant mixing tank and is fixedly connected to multiple stirring blades.

[0014] Preferably, an L-shaped guide plate is installed on one side of the upper end of the flotation pool, a threaded rod is rotatably connected to the inside of one side of the flotation pool, a slider is threadedly connected to the outside of the threaded rod, the slider is rotatably connected to the transmission shaft, a pollutant collection groove is opened inside one side of the flotation pool, and a triangular guide plate is provided at the bottom of the inner cavity of the pollutant collection groove for guiding the discharge and collection of pollutants.

[0015] Preferably, a plurality of rotating grooves are opened inside the rotating belt, and the inner cavities of the plurality of rotating grooves are rotatably connected to a rotating shaft, and the rotating shaft is located outside the inner cavity of the rotating groove and is fixedly connected to a fixed disk, and a torsion spring is fixedly connected to one end face of the fixed disk, and the torsion spring is fixedly connected to the inner wall of the rotating groove, and one end of the rotating shaft is fixedly connected to the mounting block.

[0016] Preferably, a drain outlet is provided at the lower portion of one side of the flotation pool, a louver assembly is provided in the inner cavity of the drain outlet, and the louver assembly includes a plurality of louver blades rotating in the inner cavity of the drain outlet, a sealing groove is provided in the upper wall of the drain outlet, and the louver blade is located in the inner cavity of the sealing groove and is fixedly connected to a driven bevel gear at one end, a cylinder is rotatably connected to the inner cavity of the sealing groove, a plurality of transmission bevel gears are fixedly connected to the outside of the cylinder, and the transmission bevel gear is meshingly connected to the driven bevel gear.

[0017] The beneficial effects of the present invention are as follows: 1. The air flotation method seawater purification pretreatment device described in the present invention fills the pressurized air into the seawater through the air guide pipe. Since the partition separates the flotation tank into multiple cavities, the seawater will fill each cavity from left to right in turn, and the air will also attach to the seawater in the left cavity in advance to gather suspended matter, so that the seawater flowing into the next cavity will gradually reduce its internal suspended matter. In this way, when the seawater is discharged through the drain port, the internal suspended matter can be cleaned up by the air bubble attachment, thereby improving the seawater purification efficiency. In addition, the setting of the partition can also reduce the flow rate of the seawater, increase the time for the air bubble to clean the internal suspended matter of the seawater, and then drive the rotating belt to rotate, thereby driving the scraper to scrape and clean the scum layer on the surface of the seawater. After the scraper scrapes the pollutants to move to the L-shaped guide plate, the L-shaped guide plate will scrape and recycle the pollutants remaining on the scraper surface, thereby preventing a small amount of pollutants from adhering to the surface of the scraper, resulting in the scraper After rotating one circle, the small amount of pollutants adhering to the scraper surface returns to the seawater again, affecting the purification efficiency of the seawater.

[0018] 2. The flotation method seawater purification pretreatment device described in the present invention discharges seawater into a threaded pipe through a water pump, and flows along the inner cavity of the threaded pipe in a threaded manner, and then impacts the impeller to drive the rotating shaft to rotate, and the seawater is discharged into the coagulant mixing tank through the connecting port. During the rotation of the rotating shaft, the discharge blades and the stirring rod are driven to rotate, and then the coagulant is discharged quantitatively and mixed with the seawater in the inner cavity of the connecting port. At the same time, the stirring rod stirs the coagulant in the coagulant storage cylinder to prevent the coagulant from accumulating at the bottom of the inner cavity of the coagulant storage cylinder, causing the coagulant to be squeezed and blocked and unable to be discharged. Moreover, during the rotation of the rotating shaft, the stirring blades are also driven to stir and mix the seawater and the coagulant in the coagulant mixing tank for a second time, so that the coagulant and the seawater are mixed more evenly, thereby reducing energy consumption, improving the uniformity of mixing the coagulant and the seawater, and improving the efficiency of seawater purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the main view of the present invention as a whole; Figure 2 It is a schematic diagram of the structure of the rear-view stereogram of the present invention; Figure 3 This is a schematic diagram of the internal structure of a half-section of the flotation tank of the present invention; Figure 4 It is a schematic diagram of the internal structure of a partially cutaway portion of a threaded pipe of the present invention; Figure 5 This is a schematic diagram of a semi-section structure of a coagulant mixing tank of the present invention; Figure 6This is a schematic diagram of the overall structure of the scraper installation of the present invention; Figure 7 It is a schematic diagram of the internal structure of the rotating belt of the present invention in partial section; Figure 8 This is a schematic diagram of the overall structure of the shutter installation of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the pressurized chamber of the present invention in partial section; In the figure: 1. Flocculant mixing tank; 2. Air flotation tank; 3. Observation box; 4. Flocculant mixing tank; 5. Seawater drive assembly; 51. Threaded pipe; 52. Water inlet; 53. Connecting port; 54. Impeller; 55. Rotating shaft; 56. Stirring blade; 57. Stirring rod; 58. Feeding blade; 59. Feeding port; 6. Coagulant storage cylinder; 7. Flocculant storage cylinder; 8. Slag scraping assembly; 81. rotating belt; 82. scraper; 83. mounting block; 84. transmission shaft; 85. rotating groove; 86. rotating shaft; 87. fixed plate; 88. torsion spring; 9. Servo motor; 10. Belt; 12. L-shaped guide plate; 13. Slider; 14. Threaded rod; 15. Sealing cover; 16. Air inlet duct; 17. Driving pulley; 18. Stirring frame; 19. Driven pulley; 20. Filter element; 21. L-shaped guide plate; 22. Pollutant collecting tank; 23. Louver; 24. Air guide tube; 25. Partition; 26. Conduit; 27. Screw; 28. Pressurization chamber; 29. ​​Dividing plate; 30. Vent; 31. Piston plate; 32. Limiting column; 33. Connecting port; 34. Drainage port; 35. Cylinder; 36. Sealing groove; 37. Driven bevel gear; 38. Driving bevel gear. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0022] like Figures 1 to 9 As shown, an air flotation method seawater purification pretreatment device according to an embodiment of the present invention comprises a flocculant mixing tank 1 and an air flotation tank 2 installed on one side of the flocculant mixing tank 1, and a coagulant mixing tank 4 is provided at one end of the flocculant mixing tank 1, and an observation box 3 is installed on one side of the air flotation tank 2, and a sealing cover 15 is rotatably connected to the upper end surface of the observation box 3, and the sealing cover 15 is made of an acrylic plate, an L-shaped guide plate 12 is fixedly connected to one side of the upper end surface of the air flotation tank 2, and a scraper assembly 8 is provided in the inner cavity of the air flotation tank 2; The scraper assembly 8 includes a transmission shaft 84 rotatably arranged in the inner cavity of the air flotation tank 2, and the transmission shaft 84 is externally connected to a plurality of rotating belts 81, and a mounting block 83 is rotatably arranged between every two rotating belts 81, and a scraper 82 is fixedly connected to one end of the mounting block 83, and the scraper 82 is arranged in an L shape for scraping pollutants; A plurality of air guide tubes 24 are arranged at the bottom of the inner cavity of the flotation pool 2, and a plurality of air holes are arranged outside the plurality of air guide tubes 24 for discharging pressurized air. A plurality of baffles 25 are installed in the inner cavity of the flotation pool 2, and the plurality of baffles 25 are successively increased in height from left to right, for guiding the flow direction of seawater and reducing the flow rate of seawater.

[0023] Specifically, in the prior art, when scraping pollutants floating on the water surface, the scraping equipment usually uses a roller or a scraper with a convex plate to scrape the pollutants on the surface of the seawater. However, since the pollutants generated inside the seawater have a certain viscosity, a small amount of pollutants will adhere to the surface of the scraping equipment. After the scraping equipment rotates one circle, the small amount of pollutants adhered to the surface of the scraping equipment will return to the seawater again, resulting in a decrease in the overall treatment efficiency. The present invention discharges seawater into the coagulant mixing tank 4, and adds a coagulant to the coagulant mixing tank 4 to mix with the seawater. When the seawater in the coagulant mixing tank 4 reaches a certain height, the coagulated seawater flows into the flocculant mixing tank 1, and adds a flocculant to the flocculant mixing tank 1 to mix with the seawater. When the seawater in the flocculant mixing tank 1 reaches a certain height, the flocculated seawater flows into the flotation tank 2. Since the flotation tank 2 is provided with a plurality of baffles 25 and a plurality of baffles 25 are provided in the flotation tank 2, the flotation tank 2 is provided with a plurality of baffles 25. The baffles 25 are gradually increased in height from left to right. After the seawater fills the entire flotation tank 2, the setting of multiple baffles 25 will effectively reduce the flow rate of the seawater, and then inject pressurized air into the air pipe 24, and the pressurized air will be discharged through the air holes of the air pipe 24 and filled into the seawater. Since the baffles 25 separate the flotation tank 2 into multiple cavities, when the air pipe 24 fills the pressurized air into the seawater through the air holes, the tiny bubbles formed by the air will be evenly distributed in each cavity. In the cavity, tiny bubbles gradually adhere to and gather on the surface of the suspended matter, and float to the surface of the seawater to form a scum layer, and then the transmission shaft 84 is driven to rotate, and the transmission shaft 84 drives the rotating belt 81 to rotate, and then drives the mounting block 83 to rotate, thereby driving the scraper 82 to scrape and clean the scum layer on the surface of the seawater, and an L-shaped guide plate 12 is installed on one side of the upper end surface of the flotation tank 2, and then after the scraper 82 scrapes the pollutants and moves to the L-shaped guide plate 12, the scraper 82 will be inserted into the inner cavity of the L-shaped guide plate 12, and then with the continuous rotation of the scraper 82, the L-shaped guide plate 12 will scrape and recycle the pollutants remaining on the surface of the scraper 82, thereby solving the problem that the pollutants generated in the seawater have a certain viscosity, and a small amount of pollutants will adhere to the surface of the scraper device, and after the scraper device rotates one circle, the small amount of pollutants adhering to the surface of the scraper device returns to the seawater again, resulting in a decrease in the overall treatment efficiency.

[0024] like Figure 1 , Figure 3 and Figure 5 As shown, a servo motor 9 is installed on the upper end surface of the flocculant mixing tank 1, a transmission pulley 17 is fixedly connected to the output shaft end of the servo motor 9, a stirring frame 18 is fixedly connected to the lower end of the transmission pulley 17, and the stirring frame 18 is arranged in the inner cavity of the flocculant mixing tank 1, the transmission pulley 17 is externally connected to a belt 10, one end of the belt 10 is connected to a driven pulley 19, and an air pressurizing component is arranged at the lower end of the driven pulley 19.

[0025] like Figure 1 , Figure 3 and Fig. 9As shown, the air pressurizing component includes a pressurizing chamber 28 opened inside one side of the flocculant mixing tank 1, a partition plate 29 is arranged in the pressurizing chamber 28, a plurality of air vents 30 are opened on the upper end surface of the partition plate 29, and the inner cavities of the plurality of air vents 30 are all provided with one-way valves, and the one-way valves can only be flipped open toward the bottom of the pressurizing chamber 28, a conduit 26 is fixedly connected to the bottom of the inner cavity of the pressurizing chamber 28, and one end of the conduit 26 is connected to the air guide tube 24, a one-way valve is arranged in the inner cavity of the conduit 26, and the one-way valve can only be flipped open toward the inner cavity of the air guide tube 24.

[0026] like Figure 3 and Fig. 9 As shown, a screw rod 27 is rotatably connected to the upper end surface of the dividing plate 29, and the upper end of the screw rod 27 is fixedly connected to the driven pulley 19. The external thread of the screw rod 27 is connected to a piston plate 31. A one-way valve is arranged in the piston plate 31, and the one-way valve can only be flipped open toward the upper wall of the pressurizing chamber 28. Two limit columns 32 are fixedly connected to the upper end surface of the dividing plate 29, and the piston plate 31 is slidably arranged outside the limit columns 32. Two air inlet pipes 16 are fixedly connected to one side of the upper end surface of the flocculant mixing tank 1, and the two air inlet pipes 16 are connected to the pressurizing chamber 28, and the inner cavity of the air inlet pipe 16 is provided with a filter element 20.

[0027] Specifically, after the coagulated seawater flows into the flocculant mixing tank 1, the servo motor 9 is started to drive the stirring frame 18 to rotate, and the stirring frame 18 will stir the seawater in the flocculant mixing tank 1, and at the same time, flocculants are added into the flocculant mixing tank 1 to mix evenly with the seawater. After the seawater in the flocculant mixing tank 1 reaches a certain height, it will flow into the flotation tank 2, and the servo motor 9 will drive the transmission pulley 17 to rotate when it is started, and the transmission belt 10 will rotate, and then the driven pulley 19 will rotate, and at the same time, the screw rod 27 will rotate, and during the rotation of the screw rod 27, the piston plate 31 will be threaded to slide back and forth in the pressurizing chamber 28, and when the piston plate 31 moves upward, negative pressure will be formed between the piston plate 31 and the dividing plate 29, and then the one-way valve will be opened to draw external air into the pressurizing chamber 28 through the air intake pipe 16, and the air intake pipe 16 is provided with a filter element 20, and the drawn air will be filtered through the filter element 20. Internal dust, and then when the piston plate 31 slides downward, it will squeeze the air between the piston plate 31 and the dividing plate 29. When the air reaches a certain pressure, it will impact the one-way valve in the inner cavity of the vent 30 to flip open, so that the air will be filled into the bottom of the pressurized chamber 28. Since there is a certain amount of air at the bottom of the pressurized chamber 28 itself, after the new air is filled into the bottom of the pressurized chamber 28, the pressure reaches a critical value and will open the one-way valve in the conduit 26, so that the air is filled into the air guide pipe 24, and is filled into the seawater through the air holes to form tiny bubbles to attach and aggregate suspended matter, and then drive the suspended matter to float to the surface of the seawater to form a scum layer waiting to be cleaned, thereby solving the problem that when the existing air flotation method seawater purification pretreatment device is filled with dissolved air into the seawater, it is necessary to use a high-pressure air pump to draw air into the air pump for pressurization, and then fill it into the seawater through the air guide pipe to form tiny bubbles to attach and aggregate suspended matter, which not only consumes a lot of energy but also increases the cost of seawater purification.

[0028] like Figure 3 , Figure 4 and Figure 5 As shown, a connection port 33 is provided on the inner wall of the flocculant mixing tank 1, and the inner cavity of the flocculant mixing tank 1 is connected with the coagulant mixing tank 4 through the connection port 33, and the connection port 33 is opened at a position higher than the right wall of the inner cavity of the flocculant mixing tank 1, a flocculant storage cylinder 7 is installed on the upper end surface of the flocculant mixing tank 1, a discharge port is provided at the bottom of the inner cavity of the flocculant storage cylinder 7, and an electromagnetic valve is provided in the inner cavity of the discharge port, and the inner cavity of the flocculant storage cylinder 7 is connected with the inner cavity of the flocculant mixing tank 1 through the discharge port.

[0029] Specifically, when flocculating and mixing seawater, the seawater flows into the flocculant mixing tank 1 through the connection port 33, and at the same time, the servo motor 9 is started to drive the transmission pulley 17 to rotate, and the transmission pulley 17 drives the stirring frame 18 to rotate, and at the same time, the solenoid valve is used to open the discharge port to quantitatively discharge the flocculant in the flocculant storage cylinder 7 into the flocculant mixing tank 1, and then the stirring frame 18 is used to stir the flocculant and seawater to mix evenly, so that the seawater reacts quickly to form flocculated seawater. Embodiment 2

[0030] like Figure 2 , Figure 4 and Figure 5 As shown, a seawater driving assembly 5 is installed on the upper end surface of the coagulant mixing tank 4, and the seawater driving assembly 5 includes a threaded pipe 51 installed on the upper end surface of the coagulant mixing tank 4, a rotating shaft 55 is rotatably connected to the middle part of the inner cavity of the threaded pipe 51, and the rotating shaft 55 is located outside the inner cavity of the threaded pipe 51 and an impeller 54 is arranged, a water inlet 52 is arranged at one end of the threaded pipe 51, a connecting port 53 is opened in the middle part of the inner cavity of the threaded pipe 51, and the connecting port 53 is connected to the inner cavity of the coagulant mixing tank 4.

[0031] like Figure 2 , Figure 4 and Figure 5 As shown, the upper end surface of the threaded pipe 51 is fixedly connected to the coagulant storage cylinder 6, a discharge port 59 is opened at the bottom of the inner cavity of the coagulant storage cylinder 6, and the discharge port 59 is connected to the inner cavity of the threaded pipe 51, one end of the rotating shaft 55 passes through the coagulant storage cylinder 6 and is fixedly connected to a stirring rod 57, the rotating shaft 55 is located outside the inner cavity of the coagulant storage cylinder 6 and is fixedly connected to a discharge blade 58, and the discharge blade 58 is used to control the amount of coagulant discharged, and the rotating shaft 55 is located outside the inner cavity of the coagulant mixing tank 4 and is fixedly connected to a plurality of stirring blades 56.

[0032] Specifically, seawater is extracted by an external water pump and discharged into the threaded pipe 51 through the water inlet 52, and the seawater flows along the inner cavity of the threaded pipe 51 in a threaded manner. After flowing to the bottom of the inner cavity of the threaded pipe 51, it impacts the impeller 54 to rotate, and the impeller 54 drives the rotating shaft 55 to rotate, and the seawater is discharged into the coagulant mixing tank 4 through the connecting port 53. During the rotation of the rotating shaft 55, the feed blade 58 and the stirring rod 57 are driven to rotate. A certain amount of coagulant will fall between the two discharge blades 58, and the discharge blades 58 will drive the coagulant to rotate synchronously during the rotation process. When the coagulant rotates to the discharge port 59, the coagulant will fall into the inner cavity of the connecting port 53 through the discharge port 59, and then mix with the seawater in the inner cavity of the connecting port 53, and at the same time rush into the coagulant mixing tank 4. During the rotation process, the stirring rod 57 will stir the coagulant in the coagulant storage cylinder 6 to prevent the coagulant from being The coagulant storage cylinder 6 is accumulated at the bottom of the inner cavity, causing the coagulant to be squeezed and blocked and unable to be discharged. In addition, during the rotation of the rotating shaft 55, the stirring blade 56 is also driven to rotate, and the stirring blade 56 is used to perform secondary stirring and mixing of the seawater and the coagulant in the coagulant mixing tank 4, so that the coagulant and seawater are mixed more evenly, thereby solving the problem that after the seawater fills the entire coagulant mixing tank with seawater in the existing air flotation method seawater purification pretreatment device, the coagulated seawater will flow into the flocculant mixing tank through the connecting port above the coagulant mixing tank, but, after the seawater that first enters the coagulant mixing tank is mixed with the coagulant, the seawater does not reach the height of the connecting port and cannot flow into the flocculant mixing tank, and the seawater that continues to enter the coagulant mixing tank has not been evenly mixed with the coagulant, and flows into the flocculant mixing tank through the connecting port, resulting in the situation that the seawater flows into the flocculant mixing tank without mixing and reacting with the coagulant, affecting the seawater purification effect.

[0033] like Figure 3 , Figure 6 and Figure 7 As shown, an L-shaped guide plate 21 is installed on one side of the upper end of the flotation tank 2, a threaded rod 14 is rotatably connected to one side of the flotation tank 2, a slider 13 is threadedly connected to the outer side of the threaded rod 14, and the slider 13 is rotatably connected to the transmission shaft 84. A pollutant collection groove 22 is opened inside one side of the flotation tank 2, and a triangular guide plate is provided at the bottom of the inner cavity of the pollutant collection groove 22 for guiding the discharge and collection of pollutants.

[0034] like Figure 1 , Figure 6 and Figure 7As shown, a plurality of rotating grooves 85 are opened inside the rotating belt 81, and the inner cavities of the plurality of rotating grooves 85 are all rotatably connected with a rotating shaft 86. The rotating shaft 86 is located outside the inner cavity of the rotating groove 85 and is fixedly connected with a fixed disk 87. A torsion spring 88 is fixedly connected to one end face of the fixed disk 87, and the torsion spring 88 is fixedly connected to the inner wall of the rotating groove 85. One end of the rotating shaft 86 is fixedly connected to the mounting block 83.

[0035] Specifically, when scraping the scum layer of the flotation tank 2, the rotating belt 81 is driven to rotate, and the rotating belt 81 drives the mounting block 83 to move, and then the mounting block 83 drives the scraper 82 to move synchronously. Since the scraper 82 is L-shaped, it can better scrape and collect pollutants on the surface of the seawater, and can also better push the scum to move to the pollutant collection tank 22. Since an L-shaped guide plate 21 is installed on one side of the upper end of the flotation tank 2, when the scraper 82 pushes the scum to the L-shaped guide plate 21, the scraper 82 will drive the mounting block 83 to rotate, and the mounting block 83 drives the rotating shaft 86 to rotate, and at the same time drives the fixed plate 87 to rotate, and then the torsion spring 88 is used to twist the fixed plate 87 and the rotating shaft 86, so that the rotating shaft 86 drives the mounting block 83 and the scraper 82 to reset, so that the scraper 82 is always aligned with the L-shaped guide plate 21. The surface of the L-shaped guide plate 21 fits tightly, thereby pushing the scum to move upward in cooperation with the L-shaped guide plate 21, and then falls into the inner cavity of the pollutant collection tank 22. Since a triangular guide plate is provided at the bottom of the inner cavity of the pollutant collection tank 22, the pollutants that fall into the pollutant collection tank 22 will cooperate with the triangular guide plate to flow to one side, so as to better collect the pollutants, thereby solving the problem that when the existing air flotation method seawater purification pretreatment device uses a scraping device to scrape and collect the scum layer, the scraping device usually uses a roller or a scraper with a convex plate to scrape the pollutants on the surface of the seawater, and the pollutant collection port on one side of the flotation tank is flat, which results in a small amount of scum always remaining on the surface of the seawater and gathering at the pollutant collection port, which the scraper cannot reach and scrape and collect.

[0036] like Figure 3 and Figure 8 As shown, a drain outlet 34 is provided at the lower part of one side of the flotation tank 2, and a louver assembly is provided in the inner cavity of the drain outlet 34, and the louver assembly includes a plurality of louver blades 23 rotating in the inner cavity of the drain outlet 34, a sealing groove 36 is provided in the upper wall of the drain outlet 34, and the louver blade 23 is located in the inner cavity of the sealing groove 36 and is fixedly connected to a driven bevel gear 37 at one end, and a cylinder 35 is rotatably connected to the inner cavity of the sealing groove 36, and a plurality of transmission bevel gears 38 are fixedly connected to the outside of the cylinder 35, and the transmission bevel gear 38 is meshingly connected with the driven bevel gear 37.

[0037] Specifically, when the seawater in the flocculant mixing tank 1 reaches a certain height and flows into the flotation tank 2, the driving cylinder 35 is rotated, and the transmission bevel gear 38 is driven to rotate, and then the meshing transmission driven bevel gear 37 is rotated, and the shutter blades 23 are driven to rotate at the same time, so that the shutter blades 23 are connected to each other to seal the drain port 34. After the seawater fills the flotation tank 2, the shutter blades 23 are driven to rotate by the cylinder 35 to adjust the size of the drain port 34, so as to control the drainage amount of seawater. In addition, the arrangement of multiple baffles 25 in the flotation tank 2 can effectively reduce the flow rate of seawater, and increase the height from left to right in sequence, so as to make the water flowing into the flotation tank 2 flow smoothly. The proportion of suspended matter on the far right in the seawater is the smallest, and then pressurized air is filled into the seawater in the right cavity through the air duct 24 to form tiny bubbles, which can attach the suspended matter inside the seawater more quickly and easily drive the suspended matter to float up to form scum, thereby solving the problem that the existing air flotation method seawater purification pretreatment device does not have any turbulent flow blocking components in the flotation tank, causing the seawater in the flotation tank to be easily and quickly discharged from the drain port, resulting in the tiny bubbles formed by the dissolved air discharged from the air duct being discharged from the drain port before they attach to the suspended matter and reach the buoyancy to float, thereby affecting the purification efficiency of the seawater.

[0038] Working principle: seawater is extracted by an external water pump and discharged into the threaded pipe 51 through the water inlet 52, and the seawater will flow along the inner cavity of the threaded pipe 51 in a threaded manner, and then after flowing to the bottom of the inner cavity of the threaded pipe 51, it will impact the impeller 54 to rotate, and the impeller 54 will drive the rotating shaft 55 to rotate, and the seawater will be discharged into the coagulant mixing tank 4 through the connecting port 53. During the rotation of the rotating shaft 55, the feeding blade 58 and the stirring rod 57 will be driven to rotate. Since a certain amount of coagulant will fall between the two feeding blades 58, the feeding blade 58 will rotate during the rotation of the feeding blade 58, and the coagulant will rotate synchronously. When the coagulant rotates to the feeding When the coagulant is at the opening 59, the coagulant will fall into the inner cavity of the communicating opening 53 through the discharge opening 59, and then mix with the seawater in the inner cavity of the communicating opening 53, and rush into the coagulant mixing tank 4 at the same time. During the rotation of the stirring rod 57, the coagulant in the coagulant storage cylinder 6 will be stirred to prevent the coagulant from accumulating at the bottom of the inner cavity of the coagulant storage cylinder 6, causing the coagulant to be squeezed and blocked and unable to be discharged. In addition, during the rotation of the rotating shaft 55, the stirring blade 56 will also be driven to rotate, and the stirring blade 56 will be used to stir and mix the seawater and the coagulant in the coagulant mixing tank 4 for a second time, so that the coagulant and the seawater are mixed more evenly. After the coagulated seawater flows into the flocculant mixing tank 1 through the connecting port 33, the servo motor 9 is started to drive the stirring frame 18 to rotate, and the stirring frame 18 will stir the seawater in the flocculant mixing tank 1. At the same time, flocculants are added into the flocculant mixing tank 1 to mix evenly with the seawater. After the seawater in the flocculant mixing tank 1 reaches a certain height, it will flow into the flotation tank 2. When the servo motor 9 is started, it will drive the transmission pulley 17 to rotate, and the transmission belt 10 to rotate, and then drive the driven pulley 19 to rotate, and at the same time drive the screw rod 27 to rotate. During the rotation process of the screw rod 27, the piston plate 31 will be threaded to slide back and forth in the pressurizing chamber 28. When the piston plate 31 moves upward, negative pressure will be formed between the piston plate 31 and the dividing plate 29, thereby opening the one-way valve to pass through the inlet. The air duct 16 draws in external air into the pressurized chamber 28, and a filter element 20 is provided in the air inlet duct 16. The drawn air will filter the internal dust through the filter element 20, and then when the piston plate 31 slides downward, it will squeeze the air between the piston plate 31 and the dividing plate 29. When the air reaches a certain pressure, it will impact the one-way valve in the inner cavity of the vent 30 to flip open, so that the air will be filled into the bottom of the pressurized chamber 28. Since there is a certain amount of air at the bottom of the pressurized chamber 28, after the new air is filled into the bottom of the pressurized chamber 28, the pressure reaches a critical value and the one-way valve in the conduit 26 will be flushed open, so that the air is filled into the air guide tube 24, and is filled into the seawater through the air holes to form tiny bubbles to attach and gather suspended matter, and then drive the suspended matter to float to the surface of the seawater to form a scum layer waiting to be cleaned; When scraping the scum layer from the flotation tank 2, the rotating belt 81 is driven to rotate, and the rotating belt 81 drives the mounting block 83 to move, and then the mounting block 83 drives the scraper 82 to move synchronously. Since the scraper 82 is L-shaped, it can better scrape and collect pollutants on the surface of the seawater, and can also better push the scum to move to the pollutant collection tank 22. Since an L-shaped guide plate 21 is installed on one side of the upper end of the flotation tank 2, when the scraper 82 pushes the scum to the L-shaped guide plate 21, the scraper 82 will drive the mounting block 83 to rotate, and the mounting block 83 will be driven by the scraper 82 to move synchronously. The movable shaft 86 rotates, driving the fixed plate 87 to rotate at the same time, and then the torsion spring 88 is used to twist the fixed plate 87 and the shaft 86, so that the shaft 86 drives the mounting block 83 and the scraper 82 to reset, so that the scraper 82 is always in close contact with the surface of the L-shaped guide plate 21, and then the scum is pushed to move upward in cooperation with the L-shaped guide plate 21, and then falls into the inner cavity of the pollutant collection tank 22. Since a triangular guide plate is provided at the bottom of the inner cavity of the pollutant collection tank 22, the pollutants falling into the pollutant collection tank 22 will cooperate with the triangular guide plate to flow to one side, so as to better collect the pollutants; When the seawater in the flocculant mixing tank 1 reaches a certain height and flows into the flotation tank 2, the driving cylinder 35 is rotated, and the transmission bevel gear 38 is driven to rotate, and then the meshing transmission driven bevel gear 37 is rotated, and the louver blades 23 are driven to rotate at the same time, so that the louver blades 23 are connected to each other and the drainage port 34 is sealed. After the seawater fills the flotation tank 2, the louver blades 23 are driven to rotate by the cylinder 35 to adjust the size of the drainage port 34, so as to control the drainage amount of seawater and ensure the seawater level in the flotation tank 2, so that the scraping mechanism can better contact the scum on the surface of the seawater and scrape it off.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flotation method seawater purification pretreatment device, comprising a flocculant mixing tank (1) and an air flotation tank (2) installed on one side of the flocculant mixing tank (1), wherein a coagulant mixing tank (4) is provided at one end of the flocculant mixing tank (1), and an observation box (3) is installed on one side of the air flotation tank (2), characterized in that: The upper end surface of the observation box (3) is rotatably connected to a sealing cover (15), and the sealing cover (15) is made of an acrylic plate. An L-shaped guide plate (12) is fixedly connected to one side of the upper end surface of the air flotation tank (2), and a scraping assembly (8) is provided in the inner cavity of the air flotation tank (2); The scraper assembly (8) comprises a transmission shaft (84) rotatably arranged in the inner cavity of the flotation tank (2), the transmission shaft (84) being externally transmission-connected to a plurality of rotating belts (81), and a mounting block (83) being rotatably arranged between every two rotating belts (81), one end of the mounting block (83) being fixedly connected to a scraper (82), and the scraper (82) being arranged in an L shape and being used to scrape pollutants; A plurality of air guide tubes (24) are arranged at the bottom of the inner cavity of the air flotation pool (2), and a plurality of air holes are arranged outside the plurality of air guide tubes (24) for discharging pressurized air. A plurality of baffles (25) are installed in the inner cavity of the air flotation pool (2), and the plurality of baffles (25) are successively and progressively increased in height from left to right, for guiding the flow direction of seawater and reducing the flow velocity of seawater.

2. The air flotation method seawater purification pretreatment device according to claim 1, characterized in that: A servo motor (9) is installed on the upper end surface of the flocculant mixing tank (1); a transmission pulley (17) is fixedly connected to the output shaft end of the servo motor (9); a stirring frame (18) is fixedly connected to the lower end of the transmission pulley (17); and the stirring frame (18) is arranged in the inner cavity of the flocculant mixing tank (1); a belt (10) is connected to the outside of the transmission pulley (17); one end of the belt (10) is connected to a driven pulley (19); and an air pressurizing component is arranged at the lower end of the driven pulley (19).

3. The air flotation method seawater purification pretreatment device according to claim 2, characterized in that: The air pressurizing component comprises a pressurizing chamber (28) opened inside one side of the flocculant mixing tank (1), a partition plate (29) is arranged inside the pressurizing chamber (28), a plurality of vents (30) are opened on the upper end surface of the partition plate (29), and the inner cavities of the plurality of vents (30) are all provided with one-way valves, and the one-way valves can only be flipped open toward the bottom of the pressurizing chamber (28), a catheter (26) is fixedly connected to the bottom of the inner cavity of the pressurizing chamber (28), and one end of the catheter (26) is connected to the air guide tube (24), the inner cavity of the catheter (26) is provided with a one-way valve, and the one-way valve can only be flipped open toward the inner cavity of the air guide tube (24).

4. The air flotation method seawater purification pretreatment device according to claim 3, characterized in that: A screw rod (27) is rotatably connected to the upper end surface of the partition plate (29), and the upper end of the screw rod (27) is fixedly connected to the driven pulley (19). The outer surface of the screw rod (27) is threadedly connected to a piston plate (31), and a one-way valve is arranged in the piston plate (31), and the one-way valve can only be flipped open toward the upper wall of the pressurizing chamber (28). Two limit columns (32) are fixedly connected to the upper end surface of the partition plate (29), and the piston plate (31) is slidably arranged outside the limit columns (32). Two air intake pipes (16) are fixedly connected to one side of the upper end surface of the flocculant mixing tank (1), and the two air intake pipes (16) are both connected to the pressurizing chamber (28), and the inner cavity of the air intake pipe (16) is provided with a filter element (20).

5. The air flotation method seawater purification pretreatment device according to claim 1, characterized in that: The inner wall of the flocculant mixing tank (1) is provided with a connection port (33), and the inner cavity of the flocculant mixing tank (1) is connected to the coagulant mixing tank (4) through the connection port (33), and the connection port (33) is opened at a position higher than the right wall of the inner cavity of the flocculant mixing tank (1), and a flocculant storage cylinder (7) is installed on the upper end surface of the flocculant mixing tank (1), and a discharge port is provided at the bottom of the inner cavity of the flocculant storage cylinder (7), and a solenoid valve is provided in the inner cavity of the discharge port, and the inner cavity of the flocculant storage cylinder (7) is connected to the inner cavity of the flocculant mixing tank (1) through the discharge port.

6. The air flotation method seawater purification pretreatment device according to claim 1, characterized in that: A seawater driving assembly (5) is installed on the upper end surface of the coagulant mixing tank (4), and the seawater driving assembly (5) comprises a threaded pipe (51) installed on the upper end surface of the coagulant mixing tank (4), a rotating shaft (55) is rotatably connected to the middle of the inner cavity of the threaded pipe (51), and an impeller (54) is arranged on the outer side of the inner cavity of the threaded pipe (51), a water inlet (52) is arranged at one end of the threaded pipe (51), and a connecting port (53) is opened in the middle of the inner cavity of the threaded pipe (51), and the connecting port (53) is connected to the inner cavity of the coagulant mixing tank (4).

7. The air flotation method seawater purification pretreatment device according to claim 6, characterized in that: The upper end surface of the threaded pipe (51) is fixedly connected to a coagulant storage cylinder (6), a discharge port (59) is provided at the bottom of the inner cavity of the coagulant storage cylinder (6), and the discharge port (59) is connected to the inner cavity of the threaded pipe (51), one end of the rotating shaft (55) passes through the coagulant storage cylinder (6) and is fixedly connected to a stirring rod (57), the rotating shaft (55) is located outside the inner cavity of the coagulant storage cylinder (6) and is fixedly connected to a discharge blade (58), and the discharge blade (58) is used to control the amount of coagulant discharged, and the rotating shaft (55) is located outside the inner cavity of the coagulant mixing tank (4) and is fixedly connected to a plurality of stirring blades (56).

8. The air flotation method seawater purification pretreatment device according to claim 1, characterized in that: An L-shaped guide plate (21) is installed on one side of the upper end of the flotation tank (2); a threaded rod (14) is rotatably connected to one side of the flotation tank (2); a slider (13) is externally threadedly connected to the threaded rod (14); the slider (13) is rotatably connected to the transmission shaft (84); a pollutant collection groove (22) is provided inside one side of the flotation tank (2); and a triangular guide plate is provided at the bottom of the inner cavity of the pollutant collection groove (22) for guiding the discharge and collection of pollutants.

9. The air flotation method seawater purification pretreatment device according to claim 1, characterized in that: A plurality of rotating grooves (85) are provided inside the rotating belt (81), and the inner cavities of the plurality of rotating grooves (85) are all rotatably connected to rotating shafts (86). The rotating shaft (86) is located outside the inner cavity of the rotating groove (85) and is fixedly connected to a fixed disk (87). A torsion spring (88) is fixedly connected to one end surface of the fixed disk (87), and the torsion spring (88) is fixedly connected to the inner wall of the rotating groove (85). One end of the rotating shaft (86) is fixedly connected to the mounting block (83).

10. The air flotation method seawater purification pretreatment device according to claim 9, characterized in that: A drainage port (34) is provided at the lower part of one side of the air flotation pool (2); a shutter assembly is provided in the inner cavity of the drainage port (34); the shutter assembly comprises a plurality of shutter blades (23) rotating in the inner cavity of the drainage port (34); a sealing groove (36) is provided in the upper wall of the drainage port (34); a driven bevel gear (37) is fixedly connected to one end of the shutter blade (23) located in the inner cavity of the sealing groove (36); a cylinder (35) is rotatably connected to the inner cavity of the sealing groove (36); a plurality of transmission bevel gears (38) are fixedly connected to the outside of the cylinder (35); the transmission bevel gear (38) is meshingly connected to the driven bevel gear (37).

Images