A flotation device based on the removal of PPCPs in wastewater

Abstract

The present invention belongs to the technical field of PPCPs removal in wastewater, and specifically is an air flotation device based on PPCPs removal in wastewater, comprising an air flotation tank, a scraping tank is arranged on one side of the air flotation tank, two scraping plates are fixedly connected between the two first transmission belts, a scraping device is arranged on one side of the two scraping plates, and a fan blade is rotatably connected between the two connecting plates; a dissolved air release device generates tiny bubbles attached to flocculent PPCPs pollutants and manganese dioxide particles, and floats the PPCPs pollutants and manganese dioxide particles to the surface of the wastewater to form scum and enter the scraping tank, and separates the PPCPs pollutants and manganese dioxide particles from the wastewater by air flotation, and completes the air flotation separation work; while the scraping plate scrapes the scum, the fan blade rotates to float the scum in the subsequent wastewater to the scraping area where the scraping plate circulates and moves to scrape the scum faster, so that the subsequent scraping plate can scrape the scum in the wastewater faster, thereby improving the scraping efficiency of the scum in the wastewater.

Description

Technical Field

[0001] The invention belongs to the technical field of PPCPs removal in wastewater, in particular to an air flotation device based on PPCPs removal in wastewater. Background Art

[0002] PPCPs (pharmaceuticals and personal care products) are an emerging pollutant. Some antibiotics, painkillers and other medicines cannot be fully absorbed by the human body after being ingested. The unabsorbed part will enter the urban sewage system with the excrement to form PPCPs pollutants, while external care products will directly enter the sewage discharge system through daily cleaning and other means. If the sewage is not treated properly, PPCPs will enter the groundwater or the urban water supply system and endanger the human body through drinking water and food. PPCPs in wastewater can be removed by flotation.

[0003] A patent with publication number CN105330069B discloses a flotation filtration treatment device that can improve the removal efficiency of suspended matter. The device includes a tank body and a dissolved air system. The tank body includes a flotation area and a filtration area. A sand filter outlet pump is provided on the filter tank outlet pipe. The sand filter outlet pump can collect the sewage in the flotation tank below the filter material layer into a sewage collection tank arranged at the rear side of the flotation tank. An overflow weir is provided on the overflow port of the collection tank, and the sewage enters the clean water tank through the overflow port of the collection tank.

[0004] When removing PPCPs from wastewater, the above scheme uses potassium permanganate oxidant to react with antibiotics in PPCPs better and faster, but may generate byproduct manganese dioxide solids, and a large number of tiny bubbles carry flocculent PPCPs and manganese dioxide particles to the surface of the wastewater to form scum, resulting in an increase in the mass of the scum. After the scum is scraped off by the scraper, the concentration and turbidity of the wastewater increase, resulting in an increase in the mass of the scum, which causes the subsequent scum to move more slowly, resulting in the problem that the scraper directly scrapes away the upper layer of wastewater but only scrapes off a small amount of scum, so that a large amount of wastewater is scraped away, and the efficiency of flotation separation of PPCPs in the wastewater is reduced.

[0005] To this end, the present invention provides a flotation device based on removing PPCPs in wastewater. 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 device based on the removal of PPCPs in wastewater described in the present invention comprises a flotation tank, two stirrers are fixedly connected to one side of the flotation tank, the two stirrers are used to stir the wastewater to flocculate the wastewater, a dissolved air release pipe is fixedly connected to one side of the flotation tank, a dissolved air release device is arranged on one side of the dissolved air release pipe, a scraping tank is arranged on one side of the flotation tank, both sides of the scraping tank are fixedly connected to fixed plates, one side of the two fixed plates are rotatably connected to two first transmission wheels, the two first transmission wheels are connected by a first transmission belt, two scraping plates are fixedly connected between the two first transmission belts, one side of the two scraping plates is provided with a scraping device, the scraping device comprises two connecting plates fixedly connected to one side of the scraping plate, a fan blade is rotatably connected between the two connecting plates, both ends of the fan blade are fixedly connected to ring teeth, both sides of the scraping tank are fixedly connected to row teeth, the two ring teeth are meshed and connected with the row teeth, and a slag storage tank is arranged on one side of the scraping tank.

[0008] Preferably, a test rod is fixedly connected between the two connecting plates, a plurality of detection ports are provided on the test rod, and a bending block is fixedly connected to one side of the fan piece.

[0009] Preferably, the scraping device also includes a fixed frame fixedly connected to one side of the connecting plate on one side, a first motor is fixedly connected in the fixed frame, a threaded rod is fixedly connected to the output end of the first motor, one end of the threaded rod is rotatably connected to the connecting plate on the other side, a threaded sleeve is slidably connected in the fan piece, the threaded sleeve is slidably connected to the test rod, the threaded sleeve is threadedly connected to the threaded rod, a fan block is rotatably connected in the threaded sleeve, and the fan block is slidably connected to the fan piece.

[0010] Preferably, the output ends of the two stirrers are both fixedly connected with stirring rods, the two stirring rods are both fixedly connected with stirring frames, and the two stirring frames are both slidably connected with the flotation tank.

[0011] Preferably, a slag storage plate is slidably connected in the slag storage pool, sliding rods are slidably connected on both sides of the slag storage pool, springs are sleeved on the sliding rods, and one end of the spring is fixedly connected to the slag storage plate.

[0012] Preferably, an inclined plate is fixedly connected to one side of the scraping pool close to the slag storage pool, and an inclined plate is fixedly connected to one side of the slag storage pool close to the scraping pool, and the two inclined plates are arranged oppositely.

[0013] Preferably, one side of the slag storage pool is rotatably connected to a reciprocating screw rod, a cleaning plate is slidably connected in the slag storage pool, the cleaning plate is threadedly connected to the reciprocating screw rod, and a one-way valve is provided on one side of the slag storage pool.

[0014] Preferably, one side of the slag storage pool is rotatably connected to a first ratchet, one side of the reciprocating screw is rotatably connected to a rotating disk, one side of the rotating disk is fixedly connected to a clamping block, one end of the reciprocating screw is fixedly connected to a second ratchet, the first ratchet and the second ratchet are arranged opposite to each other, one side of the reciprocating screw is fixedly connected to one end of a mainspring, and the other end of the mainspring is fixedly connected to the rotating disk.

[0015] Preferably, a tooth plate is fixedly connected to one side of the slag storage plate, a transmission rod is rotatably connected in the slag storage pool, a gear is fixedly connected to one side of the transmission rod, the tooth plate is meshingly connected to the gear, one end of the transmission rod passes through the slag storage pool and is fixedly connected to a second transmission wheel, a third transmission wheel is rotatably connected to one side of the slag storage pool, the third transmission wheel is fixedly connected to the first ratchet, and the second transmission wheel and the third transmission wheel are driven by a second transmission belt.

[0016] Preferably, sliding sleeves are fixedly connected to both sides of the slag storage pool, and the two sliding rods are slidably connected to the sliding sleeves. A sliding groove is provided in the sliding sleeves to enable the spring to slide in the sliding sleeves.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The flotation device for removing PPCPs from wastewater described in the present invention scrapes off the scum of the mixture of PPCPs and manganese dioxide in the wastewater through the cooperation of the scraper plate and the fan blade, and the fan blade rotates to float the scum in the subsequent wastewater to the area where the scraper plate moves cyclically to scrape the scum faster, so that the subsequent scraper plate can scrape off the scum in the wastewater faster, reducing the situation in which the scraper plate directly scrapes away the wastewater and only scrapes off a small amount of scum due to the slow movement of the subsequent scum when scraping off the scum in a cycle, so that the scraper plate can scrape off the subsequent scum instead of scraping the wastewater into the slag storage pool, thereby improving the efficiency of scraping off the scum in the wastewater.

[0019] 2. The flotation device for removing PPCPs from wastewater described in the present invention starts a first motor to rotate the threaded rod, and the threaded rod rotates to cause the threaded sleeve to slide with the fan block in the fan blade, so that the fan block slides on the fan blade and removes the wastewater remaining on the fan blade. After the fan blade rotates to stir the wastewater surface, the fan block can scrape off the wastewater remaining on the fan blade and the bent block, so that the concentration of the wastewater brought up by the bent block next time will not be affected by the concentration of the residual wastewater, so that the test rod can more accurately test the concentration of PPCPs in the wastewater after scraping. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the air flotation tank of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the scraper plate of the present invention;

[0024] Figure 4 It is a schematic diagram of the fan blade structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the fan block structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the slag storage pool structure of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the sliding sleeve of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the rotating disk of the present invention;

[0029] Fig. 9 Schematic diagram of the spring structure of the present invention;

[0030] In the figure: 1, air flotation tank; 2, mixer; 3, stirring rod; 4, stirring frame; 5, dissolved air release tube; 6, dissolved air release device; 7, fixed plate; 8, first transmission wheel; 9, first transmission belt; 10, scraper tank; 11, scraper plate; 12, transmission rod; 13, connecting plate; 14, fixed frame; 15, first motor; 16, ring gear; 17, row gear; 18, fan blade; 19, fan block; 20, bending block; 21, threaded sleeve; 22 , threaded rod; 23, test rod; 24, slag pool; 25, inclined plate; 26, slag plate; 27, second transmission wheel; 28, second transmission belt; 29, toothed plate; 30, gear; 31, one-way valve; 32, sliding sleeve; 33, sliding rod; 34, spring; 35, clearing plate; 36, third transmission wheel; 37, reciprocating screw; 38, first ratchet; 39, block; 40, spring; 41, rotating disk; 42, second ratchet. DETAILED DESCRIPTION

[0031] 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

[0032] like Figures 1 to 9As shown, an air flotation device based on the removal of PPCPs in wastewater described in an embodiment of the present invention comprises an air flotation tank 1, two mixers 2 are fixedly connected to one side of the air flotation tank 1, a dissolved air release pipe 5 is fixedly connected to one side of the air flotation tank 1, a dissolved air release device 6 is arranged on one side of the dissolved air release pipe 5, a scraping tank 10 is arranged on one side of the air flotation tank 1, fixed plates 7 are fixedly connected to both sides of the scraping tank 10, two first transmission wheels 8 are rotatably connected to one side of the two fixed plates 7, the two first transmission wheels 8 are connected by a first transmission belt 9, two scraping plates 11 are fixedly connected between the two first transmission belts 9, a scraping device is arranged on one side of the two scraping plates 11, the scraping device comprises two connecting plates 13 fixedly connected to one side of the scraping plate 11, a fan blade 18 is rotatably connected between the two connecting plates 13, both ends of the fan blade 18 are fixedly connected to ring teeth 16, both sides of the scraping tank 10 are fixedly connected to row teeth 17, the two ring teeth 16 are meshed and connected with the row teeth 17, and a slag storage tank 24 is arranged on one side of the scraping tank 10.

[0033] Specifically, when removing PPCPs from acidic wastewater, the wastewater is passed into the flotation equipment, and flocculants and coagulants are added to the wastewater to make the pollutants in the wastewater form flocs. An oxidant is also added to the wastewater to oxidize the PPCPs in the wastewater, and the antibiotics contained in the PPCPs are oxidized and separated from the water, so that the flotation equipment can better remove the PPCPs in the wastewater. When removing PPCPs from acidic wastewater, the use of potassium permanganate oxidant can better and faster oxidize the antibiotics in the PPCPs, but it may generate a by-product manganese dioxide solid, which increases the concentration and turbidity in the wastewater and makes the surface fluidity of the wastewater The scum is then scraped off by the scraper plate 11 and the transmission device. After the scum is scraped off by the scraper plate 11, the concentration and turbidity of the wastewater increase, resulting in an increase in the mass of the scum, which causes the subsequent scum to move more slowly. The scraper plate 11 directly scrapes off the wastewater on the upper layer but only scrapes off a small amount of scum, causing a large amount of wastewater to be scraped off, and the efficiency of flotation separation of PPCPs in the wastewater is reduced.

[0034] In this embodiment, when removing PPCPs from wastewater, the wastewater is passed into the flotation tank 1, and a flocculant and a coagulant are first added to the wastewater on one side of the mixer 2 and the wastewater is stirred. The wastewater undergoes a flocculation reaction to make the PPCPs in the wastewater form flocs. At the same time, potassium permanganate oxidant is added to the wastewater to undergo an oxidation reaction with antibiotics and the like contained in the PPCPs in the wastewater to form oxides. The wastewater forming flocs and oxides is passed into the area of ​​the dissolved air release device 6. The dissolved air release device 6 and the dissolved air release pipe 5 can be connected by threads or flanges, and a plurality of dissolved air release devices 6 can be provided according to specific circumstances. The dissolved air release device 6 generates tiny bubbles that adhere to the flocculent PPCPs pollutants and manganese dioxide particles, and the PPCPs pollutants and manganese dioxide particles float to the surface of the wastewater to form scum and enter the scraping tank 10, so that the PPCPs pollutants and manganese dioxide particles are separated from the wastewater by flotation, and the flotation separation work is completed. The first transmission wheel 8 and the first transmission belt 9 are driven by the first transmission wheel 8 and the first transmission belt 9. The scraper plate 11 circulates on the scraper pool 10, and the scraper plate 11 circulates to scrape the scum on the surface of the wastewater in the scraper pool 10 into the scum storage pool 24. The scraper plate 11 circulates with the connecting plate 13 and the fan blade 18 in the connecting plate 13. The fan blade 18 slides with the ring gear 16 in the scraper pool 10, and the ring gear 16 is engaged with the row of teeth 17 to rotate the fan blade 18. The rotation of the fan blade 18 floats the scum in the subsequent wastewater to the scraper area where the scraper plate 11 circulates to scrape the scum faster, so that The subsequent scraper plate 11 can scrape off the scum in the wastewater more quickly. The scraper plate 11 cooperates with the fan blade 18 to scrape off the scum in the wastewater and move the subsequent scum to the scraping area more quickly, thereby reducing the situation in which the scraper plate 11 directly scrapes away the wastewater and only scrapes off a small amount of scum due to the slow movement of the subsequent scum during the cyclic scraping of scum. The scraper plate 11 can scrape off the subsequent scum instead of scraping the wastewater into the scum storage pool 24, thereby improving the efficiency of scraping off scum in the wastewater.

[0035] like Figure 5 As shown, a test rod 23 is fixedly connected between the two connecting plates 13 , a plurality of detection ports are opened on the test rod 23 , and a bending block 20 is fixedly connected to one side of the fan piece 18 .

[0036] Specifically, when the fan blade 18 rotates to push the waste water, the fan blade 18 rotates with the bent block 20 to load the waste water after scraping the slag into the bent block 20, and the waste water flows into the detection port on the test rod 23 through the fan blade 18. The water content of the waste water after scraping the waste slag is detected through the detection port to detect the PPCPs concentration in the waste water. If the water content is small and the PPCPs concentration is high, the discharge volume of the waste water in the scraping pool 10 is reduced so that the waste water in the scraping pool 10 can continue to scrape the slag.

[0037] like Figure 5As shown, the scraping device also includes a fixed frame 14 fixedly connected to one side of the connecting plate 13 on one side, a first motor 15 is fixedly connected in the fixed frame 14, a threaded rod 22 is fixedly connected to the output end of the first motor 15, one end of the threaded rod 22 is rotatably connected to the connecting plate 13 on the other side, a threaded sleeve 21 is slidably connected in the fan blade 18, the threaded sleeve 21 is slidably connected to the test rod 23, the threaded sleeve 21 is threadedly connected to the threaded rod 22, a fan block 19 is rotatably connected in the threaded sleeve 21, and the fan block 19 is slidably connected to the fan blade 18.

[0038] Specifically, when scraping off PPCPs scum by the scraper plate 11, the first motor 15 is started to rotate the threaded rod 22. The threaded rod 22 rotates to make the threaded sleeve 21 slide with the fan block 19 in the fan blade 18, so that the fan block 19 slides on the fan blade 18 and removes the wastewater remaining on the fan blade 18. After the fan blade 18 rotates to move the wastewater surface, the wastewater remaining on the fan blade 18 can be scraped off by the fan block 19, so that the concentration of the wastewater loaded into the bending block 20 next time will not be affected by the residual wastewater.

[0039] like Figure 2 As shown, the output ends of the two stirrers 2 are both fixedly connected with stirring rods 3 , the two stirring rods 3 are both fixedly connected with stirring frames 4 , and the two stirring frames 4 are both slidably connected with the flotation tank 1 .

[0040] Specifically, when the wastewater undergoes flocculation reaction, the stirrer 2 is started to rotate the stirring rod 3 with the stirring frame 4, which can accelerate the flocculation reaction and clean the inner wall of the flotation tank 1 to prevent flocculated pollutants from adhering to the bottom and side walls of the flotation tank 1.

[0041] like Figure 6 As shown, a slag plate 26 is slidably connected in the slag pool 24 , and sliding rods 33 are slidably connected on both sides of the slag pool 24 . A spring 34 is sleeved on the sliding rod 33 , and one end of the spring 34 is fixedly connected to the slag plate 26 .

[0042] Specifically, the PPCPs scum is scraped into the slag pool 24 by the scraper plate 11 and falls on the slag plate 26. When the PPCPs scum on the slag plate 26 gradually increases, the slag plate 26 moves downward with the sliding rod 33 and compresses the spring 34, so that the PPCPs scum flows into the slag plate 26 in the slag pool 24 instead of falling directly from a high place, thereby reducing the occurrence of PPCPs scum splashing out of the slag pool 24 or splashing back into the scraper pool 10.

[0043] like Figure 6 As shown, a slag scraping pool 10 is fixedly connected to a slag storage pool 24 on one side thereof, and a slag storage pool 24 is fixedly connected to a slag scraping pool 10 on one side thereof, and the two slag plates 25 are arranged opposite to each other.

[0044] Specifically, when the scraper plate 11 scrapes the PPCPs scum in the scraper pool 10 into the scum storage pool 24 through the inclined plate 25, the inclined plate 25 is arranged obliquely to prevent the waste water in the scraper pool 10 from entering the scum storage pool 24 when there is no scraping of the scraper plate 11. After the waste water enters the scum storage pool 24, the inclined plate 25 is arranged obliquely to prevent the PPCPs scum from flowing back into the scraper pool 10. Embodiment 2

[0045] like Figures 6 to 9 As shown in Comparative Example 1, another embodiment of the present invention is:

[0046] A reciprocating screw rod 37 is rotatably connected to one side of the slag storage pool 24 , a cleaning plate 35 is slidably connected inside the slag storage pool 24 , the cleaning plate 35 is threadedly connected to the reciprocating screw rod 37 , and a one-way valve 31 is provided on one side of the slag storage pool 24 .

[0047] Specifically, by rotating the reciprocating screw rod 37 to make the cleaning plate 35 reciprocate in the slag pool 24, the scum in the slag pool 24 can be cleaned by the cleaning plate 35 and flow out of the one-way valve 31 for subsequent treatment and purification.

[0048] like Figure 8 As shown, one side of the slag pool 24 is rotatably connected to the first ratchet 38, one side of the reciprocating screw 37 is rotatably connected to the rotating disk 41, one side of the rotating disk 41 is fixedly connected to a clamping block 39, one end of the reciprocating screw 37 is fixedly connected to the second ratchet 42, the first ratchet 38 and the second ratchet 42 are arranged opposite to each other, one side of the reciprocating screw 37 is fixedly connected to one end of the mainspring 40, and the other end of the mainspring 40 is fixedly connected to the rotating disk 41.

[0049] Specifically, when the first ratchet 38 rotates forward, the block 39 will not jam the first ratchet 38, so that the first ratchet 38 rotates normally and the second ratchet 42 does not rotate. When the first ratchet 38 rotates reversely, the block 39 jams the first ratchet 38 so that the rotating disk 41 rotates together with the first ratchet 38. At this time, the slag plate 26 blocks the movement of the cleaning plate 35, making it impossible for the reciprocating screw 37 to rotate. Therefore, the rotation of the rotating disk 41 will cause the mainspring 40 to rotate and store energy. When the slag plate 26 moves to the lowermost side and does not block the cleaning plate 35, the mainspring 40 generates elastic force to restore the deformation and rotate the reciprocating screw 37, so that the cleaning plate 35 slides in the slag pool 24 to clean the PPCPs slag in the slag pool 24 out of the slag pool 24.

[0050] like Figure 6As shown, a tooth plate 29 is fixedly connected to one side of the slag storage plate 26, a transmission rod 12 is rotatably connected in the slag storage pool 24, a gear 30 is fixedly connected to one side of the transmission rod 12, the tooth plate 29 is meshed with the gear 30, one end of the transmission rod 12 passes through the slag storage pool 24 and is fixedly connected to the second transmission wheel 27, a third transmission wheel 36 is rotatably connected to one side of the slag storage pool 24, the third transmission wheel 36 is fixedly connected to the first ratchet wheel 38, and the second transmission wheel 27 and the third transmission wheel 36 are transmitted through the second transmission belt 28.

[0051] Specifically, the gear 30 rotates by moving the residue plate 26 downward and the second transmission wheel 27 rotates through the transmission rod 12. The second transmission wheel 27 rotates the third transmission wheel 36 through the second transmission belt 28. The rotation of the third transmission wheel 36 can rotate the first ratchet wheel 38 to complete the energy storage of the clockwork 40.

[0052] like Figure 7 As shown, sliding sleeves 32 are fixedly connected to both sides of the slag storage pool 24 , and two sliding rods 33 are slidably connected to the sliding sleeves 32 . A sliding groove is provided in the sliding sleeves 32 to enable the spring 34 to slide in the sliding sleeves 32 .

[0053] Specifically, when the slag plate 26 moves downward, the height of the sliding sleeve 32 matches the gear 30, and the slag plate 26 can only move to the height of the sliding sleeve 32 to prevent the slag plate 26 from contacting the gear 30, thereby protecting the normal operation of the gear 30, and the spring 34 can also slide and retract better on the sliding rod 33.

[0054] Working principle: When removing PPCPs from wastewater, the wastewater is passed into the flotation tank 1. Flocculants and coagulants are first added to the wastewater on one side of the mixer 2 and the wastewater is stirred. The wastewater undergoes a flocculation reaction to form flocs of PPCPs in the wastewater. At the same time, potassium permanganate oxidant is added to the wastewater to undergo an oxidation reaction with antibiotics contained in the PPCPs in the wastewater to form oxides. The wastewater forming flocs and oxides is passed into the dissolved air release device 6 area. The dissolved air release device 6 generates tiny bubbles that attach to the flocculent PPCPs pollutants and manganese dioxide particles, and floats the PPCPs pollutants and manganese dioxide particles to the surface of the wastewater to form scum. The scraper enters the scraper pool 10, and the scraper plate 11 is moved cyclically on the scraper pool 10 by the first transmission wheel 8 and the first transmission belt 9. The scraper plate 11 is moved cyclically to scrape the scum on the surface of the wastewater in the scraper pool 10 into the scum storage pool 24. The scraper plate 11 is moved cyclically to move the connecting plate 13 and the fan blade 18 in the connecting plate 13. The fan blade 18 slides in the scraper pool 10 with the ring gear 16, and the ring gear 16 is meshed with the row of teeth 17 to rotate the fan blade 18. The rotation of the fan blade 18 floats the scum in the subsequent wastewater to the scraper plate 11 cyclically moving scraping area more quickly, so that the subsequent scraper plate 11 can scrape the scum in the wastewater more quickly.

[0055] When the fan blade 18 rotates to push the waste water, the fan blade 18 rotates with the curved block 20 to load the waste water after scraping the slag into the curved block 20, and the waste water flows into the detection port on the test rod 23 through the fan blade 18. The water content of the waste water after scraping the slag is detected through the detection port to detect the PPCPs concentration in the waste water. If the water content is small and the PPCPs concentration is large, the drainage volume of the waste water in the scraping pool 10 is reduced to allow the waste water in the scraping pool 10 to continue to scrape the slag; when the PPCPs slag is scraped off by the scraping plate 11, the first motor 15 is started to rotate the threaded rod 22, and the threaded rod 22 rotates The threaded sleeve 21 is moved to slide with the fan block 19 in the fan blade 18, so that the fan block 19 slides on the fan blade 18 and removes the wastewater remaining on the fan blade 18. After the fan blade 18 rotates to move the wastewater surface, the wastewater remaining on the fan blade 18 is scraped off by the fan block 19, so that the concentration of the wastewater loaded by the bending block 20 next time will not be affected by the residual wastewater; when the wastewater undergoes flocculation reaction, the stirrer 2 is started to rotate the stirring rod 3 with the stirring frame 4, which can accelerate the flocculation reaction and clean the inner wall of the flotation tank 1 at the same time to prevent the flocculated pollutants from adhering to the bottom and side walls of the flotation tank 1;

[0056] The PPCPs scum is scraped into the slag pool 24 and falls on the slag plate 26 by the scraper plate 11. When the PPCPs scum on the slag plate 26 gradually increases, the slag plate 26 moves downward with the sliding rod 33 and compresses the spring 34, so that the PPCPs scum flows into the slag plate 26 in the slag pool 24 instead of falling directly from a high place, thereby reducing the PPCPs scum splashing out of the slag pool 24 or splashing back into the scraper pool 10. When the scraper plate 11 scrapes the PPCPs scum in the scraper pool 10 into the slag pool 24 through the inclined plate 25, the inclined plate 26 moves downward with the sliding rod 33 and compresses the spring 34, so that the PPCPs scum flows into the slag plate 26 in the slag pool 24 instead of falling directly from a high place, thereby reducing the PPCPs scum splashing out of the slag pool 24 or splashing back into the scraper pool 10. The inclined plate 25 is set to prevent the wastewater in the scraping pool 10 from entering the slag storage pool 24 when there is no scraping of the scraping plate 11. When the wastewater enters the slag storage pool 24, the inclined plate 25 can prevent the PPCPs scum from flowing back into the scraping pool 10; by rotating the reciprocating screw 37 to make the cleaning plate 35 reciprocate in the slag storage pool 24, the scum in the slag storage pool 24 can be cleaned by the cleaning plate 35 and flow out of the one-way valve 31 for subsequent treatment and purification; when the first ratchet 38 rotates forward, the block 39 will not block the first ratchet 38, so that the first ratchet 38 rotates normally and the second ratchet 4 2 will not rotate. When the first ratchet wheel 38 reverses, the block 39 clamps the first ratchet wheel 38 so that the rotating disk 41 rotates together with the first ratchet wheel 38. Since the slag plate 26 blocks the movement of the cleaning plate 35 and the reciprocating screw rod 37 cannot rotate, the rotation of the rotating disk 41 will cause the spring 40 to rotate and store energy. When the slag plate 26 moves to the lowermost side and does not block the cleaning plate 35, the spring 40 generates elastic force to restore the deformation and rotate the reciprocating screw rod 37, so that the cleaning plate 35 slides in the slag pool 24 to clean the PPCPs scum in the slag pool 24 out of the slag pool 24; The slag plate 26 moves downward to rotate the gear 30 and rotate the second transmission wheel 27 through the transmission rod 12. The second transmission wheel 27 rotates the third transmission wheel 36 through the second transmission belt 28. The rotation of the third transmission wheel 36 can rotate the first ratchet 38 to complete the energy storage of the clockwork 40. When the slag plate 26 moves downward, the height of the sliding sleeve 32 matches the gear 30. The slag plate 26 can only move to the height of the sliding sleeve 32 to prevent the slag plate 26 from contacting the gear 30, thereby protecting the normal operation of the gear 30, and the spring 34 can also slide and retract better on the sliding rod 33.

[0057] 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 device for removing PPCPs from wastewater, characterized by: A flotation tank is included, wherein two stirrers are fixedly connected to one side of the flotation tank, and the two stirrers are used to stir wastewater to flocculate the wastewater. A dissolved air release pipe is fixedly connected to one side of the flotation tank, and a dissolved air release device is provided on one side of the dissolved air release pipe. A scraping tank is provided on one side of the flotation tank. Fixed plates are fixedly connected to both sides of the scraping tank. Two first transmission wheels are rotatably connected to one side of the two fixed plates. The two first transmission wheels are connected by a first transmission belt. Two scraping plates are fixedly connected between the two first transmission belts. A scraping device is provided on one side of the two scraping plates. The scraping device includes two connecting plates fixedly connected to one side of the scraping plates, and a fan blade is rotatably connected between the two connecting plates. Both ends of the fan blade are fixedly connected to ring teeth. Row teeth are fixedly connected to both sides of the scraping tank. The two ring teeth are meshed with the row teeth. A slag storage tank is provided on one side of the scraping tank. A slag storage plate is slidably connected in the slag storage pool, and sliding rods are slidably connected on both sides of the slag storage pool. Springs are sleeved on the sliding rods, and one end of the spring is fixedly connected to the slag storage plate; The scraping pool is fixedly connected to an inclined plate on one side close to the slag storage pool, and the slag storage pool is fixedly connected to an inclined plate on one side close to the scraping pool, and the two inclined plates are arranged oppositely; A reciprocating screw rod is rotatably connected to one side of the slag storage pool, a cleaning plate is slidably connected in the slag storage pool, the cleaning plate is threadedly connected to the reciprocating screw rod, and a one-way valve is provided on one side of the slag storage pool; One side of the slag storage pool is rotatably connected to a first ratchet, one side of the reciprocating screw is rotatably connected to a rotating disk, one side of the rotating disk is fixedly connected to a clamping block, one end of the reciprocating screw is fixedly connected to a second ratchet, the first ratchet and the second ratchet are arranged oppositely, one side of the reciprocating screw is fixedly connected to one end of a clockwork spring, and the other end of the clockwork spring is fixedly connected to the rotating disk; A toothed plate is fixedly connected to one side of the slag storage plate, a transmission rod is rotatably connected in the slag storage pool, a gear is fixedly connected to one side of the transmission rod, the toothed plate is meshingly connected to the gear, one end of the transmission rod passes through the slag storage pool and is fixedly connected to a second transmission wheel, a third transmission wheel is rotatably connected to one side of the slag storage pool, the third transmission wheel is fixedly connected to the first ratchet, and the second transmission wheel and the third transmission wheel are driven by a second transmission belt.

2. The flotation device for removing PPCPs from wastewater according to claim 1, characterized in that: A test rod is fixedly connected between the two connecting plates, a plurality of detection ports are opened on the test rod, and a bending block is fixedly connected to one side of the fan sheet.

3. The flotation device for removing PPCPs from wastewater according to claim 2, characterized in that: The scraping device also includes a fixed frame fixedly connected to one side of the connecting plate on one side, a first motor is fixedly connected in the fixed frame, a threaded rod is fixedly connected to the output end of the first motor, one end of the threaded rod is rotatably connected to the connecting plate on the other side, a threaded sleeve is slidably connected in the fan piece, the threaded sleeve is slidably connected to the test rod, the threaded sleeve is threadedly connected to the threaded rod, a fan block is rotatably connected in the threaded sleeve, and the fan block is slidably connected to the fan piece.

4. The flotation device for removing PPCPs from wastewater according to claim 3, characterized in that: The output ends of the two stirrers are both fixedly connected with stirring rods, the two stirring rods are both fixedly connected with stirring racks, and the two stirring racks are both slidably connected with the flotation tank.

5. The flotation device for removing PPCPs from wastewater according to claim 1, characterized in that: Sliding sleeves are fixedly connected to both sides of the slag storage pool, and the two sliding rods are slidably connected to the sliding sleeves. A sliding groove is provided in the sliding sleeves to enable the spring to slide in the sliding sleeves.

Images