Wastewater treatment method based on air flotation separation

Abstract

The invention relates to the field of wastewater treatment, in particular to a wastewater treatment method based on air flotation separation, which comprises a barrel, an inlet and outlet unit, a driving motor, a rotating rod, a multi-stage electric push rod, a partition plate and the like, the cylinder body is connected with an inlet and outlet unit for feeding and discharging water; the barrel is rotationally connected with a rotating rod, and an output shaft of the driving motor is fixedly connected with the rotating rod; a plurality of multi-stage electric push rods are fixedly connected to the bottom of the barrel; the telescopic parts of all the multi-stage electric push rods are fixedly connected with a partition plate jointly, and the partition plate is in sliding connection with the inner wall of the barrel. Wastewater penetrates through the filter screen from bottom to top, large deposited impurities in the wastewater are filtered, and the filtered large impurities can precipitate downwards under the action of self gravity and cannot be accumulated and attached to the surface of the filter screen, so that the content of the impurities attached to the surface of the filter screen is effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of wastewater treatment, and in particular to a wastewater treatment method based on air flotation separation. Background Art

[0002] When treating wastewater, the existing method is usually to first pass the wastewater into a sedimentation tank, remove the suspended solids in the wastewater that are larger than water and have a density greater than that of water by static sedimentation, and then pass the water after sedimentation treatment into a flotation tank, and then dehydrate the impurities separated by sedimentation and the remaining wastewater; by passing bubbles into the wastewater in the flotation tank, fine suspended matter will be attached during the floating process of the bubbles, causing them to float to the water surface to form scum, and then the scum formed on the water surface is scraped off by the corresponding scraper, and finally the wastewater treated by sedimentation and flotation is subjected to the next step of treatment; however, the sedimentation tank and the flotation tank require a large area, and both sedimentation and flotation take a long time, resulting in low wastewater treatment efficiency. Summary of the invention

[0003] In order to overcome the shortcomings that sedimentation tanks and flotation tanks require a large area, and both sedimentation and flotation take a long time, resulting in low overall wastewater treatment efficiency, the present invention provides a wastewater treatment device based on flotation separation.

[0004] The technical solution is: a wastewater treatment equipment based on flotation separation, including a cylinder and an inlet and outlet unit; the cylinder is connected to the inlet and outlet unit for water inlet and water discharge; it also includes a drive motor, a rotating rod, a multi-stage electric push rod, a partition plate, an electric slide rail, a rotating plate, a filter screen, an air pipe and an aeration pipe; the cylinder is fixedly connected to the drive motor; the cylinder is rotatably connected to the rotating rod, and the output shaft of the drive motor is fixedly connected to the rotating rod; a plurality of multi-stage electric push rods are fixedly connected to the bottom of the cylinder; all the telescopic parts of the multi-stage electric push rods are connected together A partition plate is fixedly connected to the cylinder, and the partition plate is slidably connected to the inner wall of the cylinder; a plurality of connecting grooves are formed on the partition plate; an electric slide rail is fixedly connected to the partition plate; a rotating plate is fixedly connected to the sliding portion of the electric slide rail; a plurality of through grooves are formed on the rotating plate, and a filter is fixedly connected to each through groove of the rotating plate; a plurality of air pipes are fixedly connected to the partition plate, the air pipes are fixedly connected to the telescopic portion of the multi-stage electric push rod, and the air pipes penetrate the cylinder and are connected to an external pump; a plurality of aeration pipes are fixedly connected to the partition plate, and the aeration pipes are connected to the air pipes.

[0005] As an improvement of the above scheme, it also includes a movable plate and an elastic rope; each rotating plate has two movable plates rotatably connected to the through slot through a torsion spring, and the movable plates are located above the filter; the two movable plates on the same through slot are each commonly fixedly connected to two elastic ropes.

[0006] As an improvement of the above scheme, it also includes a scum frame, a fixed block and a scraper; the cylinder is fixedly connected to the scum frame, and the scum frame is connected to a water outlet pipe; the rotating rod is fixedly connected to the fixed block, and the fixed block is rotatably connected to the mounting frame of the cylinder; the fixed block is fixedly connected to a plurality of scrapers for scraping off scum.

[0007] As an improvement to the above solution, the lower portion of the fixing block is configured to be in a conical shape that is smaller at the bottom and larger at the top.

[0008] As an improvement of the above solution, the scraper plate 1 is configured as an arc-shaped plate.

[0009] As an improvement of the above scheme, it also includes an air supply pipe, an air blowing pipe and a guide piece; the fixing block is fixedly connected to the air supply pipe; the air supply pipe is connected to a plurality of air blowing pipes, and the air blowing pipes are fixedly connected to the fixing block; a guide piece is fixedly connected to the pipe opening of each air blowing pipe.

[0010] As an improvement of the above scheme, it also includes a sliding sleeve and a second scraper; the rotating rod is provided with a spline groove; the rotating rod is slidably connected to the sliding sleeve, and the sliding sleeve is rotatably connected to the electric slide rail; the sliding sleeve is fixedly connected to the second scraper, and the second scraper is fitted with the rotating plate and the bottom of the filter.

[0011] As an improvement of the above solution, the scraper 2 is arranged to be inclined.

[0012] As an improvement of the above scheme, it also includes a rotating rod, a breaking rod, a protrusion and a paddle plate; the scraper plate 2 is rotatably connected to the rotating rod; a number of breaking rods are fixedly connected to the rotating rod; a number of protrusions are fixedly connected to the bottom of the electric slide rail; a number of paddle plates are fixedly connected to the rotating rod, and the position of the protrusion corresponds to the position of the paddle plate.

[0013] As an improvement of the above scheme, a wastewater treatment method based on flotation separation includes the following steps: Step 1: First, control the multi-stage electric push rod to drive the partition plate and the rotating plate, as well as other connected parts to move to the top of the sewage pipe, just higher than the sewage pipe, and control the electric slide rail to drive the rotating plate and the filter to rotate, so that the filter is aligned with the connecting groove; Step 2: Then, the wastewater is pumped from the sewage pipe into the cylinder manually, and the wastewater passes through the filter from bottom to top to filter out the larger deposited impurities in the wastewater; Step 3: When the cylinder is full of wastewater, stop the water intake, then control the partition plate to move down to the lower part of the cylinder, and control the electric slide rail to drive the rotating plate and the filter screen to rotate, so that the filter screen and the connecting groove are staggered, and the cylinder is divided into two layers, and then control the aeration pipe 1 to generate bubbles in the wastewater above the partition plate to perform flotation separation, while the wastewater below the partition plate is in a static state for sedimentation separation treatment; Step 4: After the wastewater treatment is completed, the wastewater after flotation treatment is discharged through the drain pipe 1, and the impurities deposited at the bottom of the cylinder and the wastewater remaining in the impurities are discharged through the drain pipe 2.

[0014] Beneficial effect: The wastewater passes through the filter from bottom to top, filtering out larger deposited impurities in the wastewater, and the larger impurities filtered out will settle downward under the action of their own gravity and will not accumulate and adhere to the surface of the filter, effectively reducing the content of impurities attached to the surface of the filter, thereby ensuring the filtering effect of the filter. The movable plate rotates downward, driving the wastewater to flow downward, and then backflushing the filter below, flushing away the impurities attached to the bottom side of the filter, avoiding the presence of some deposited impurities that will adhere to the bottom side of the filter and affect the filtering effect of the filter.

[0015] The cylinder is divided into two layers, upper and lower, by a partition plate and a rotating plate, so that when flotation separation is carried out above the partition plate, the wastewater below the partition plate is simultaneously subjected to sedimentation separation. Compared with the existing wastewater treatment that is first subjected to sedimentation treatment and then to flotation treatment, the efficiency of wastewater treatment can be improved.

[0016] Bubbles are generated through aeration pipe 2 to perform flotation separation on the wastewater below the partition plate, and tiny suspended impurities mixed among the deposited impurities are separated by flotation. The tiny suspended impurities separated by flotation pass through the filter and float upward, and the tiny suspended impurities mixed among the larger deposited impurities are fully separated for subsequent treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the wastewater treatment equipment based on flotation separation disclosed by the present invention; Figure 2 A cross-sectional view of a cylinder disclosed in the wastewater treatment equipment based on air flotation separation of the present invention; Figure 3 It is a schematic diagram of the combined structure of the drainage pipe 2, the driving motor, the rotating rod and the multi-stage electric push rod disclosed in the wastewater treatment equipment based on air flotation separation of the present invention; Figure 4 A cross-sectional view of a partition plate disclosed in the wastewater treatment equipment based on air flotation separation of the present invention; Figure 5 It is a schematic diagram of a combined structure of a multi-stage electric push rod, a partition plate, an air pipe and an aeration pipe disclosed in the wastewater treatment equipment based on air flotation separation of the present invention; Figure 6 It is a schematic diagram of the combined structure of the scum frame, the fixing block, the scraper 1, the air supply pipe, the air blowing pipe and the guide plate disclosed in the wastewater treatment equipment based on air flotation separation of the present invention; Figure 7 It is a schematic diagram of the combined structure of the sliding sleeve, the second scraper and the rotating rod disclosed in the wastewater treatment equipment based on air flotation separation of the present invention; Figure 8 The present invention is a schematic diagram of the combined structure of a breaking rod, a convex block and a paddle plate disclosed in the wastewater treatment equipment based on air flotation separation.

[0018] Names of the numbers in the figure: 1-cylinder, 2-sewage pipe, 3-drain pipe one, 4-drain pipe two, 5-driving motor, 6-rotating rod, 601-spline groove, 7-multi-stage electric push rod, 8-partition plate, 801-connecting groove, 9-electric slide rail, 10-rotating plate, 11-filter screen, 12-air pipe, 13-aeration pipe one, 101-movable plate, 102-elastic rope, 111-scum frame, 112-fixed block, 113-scraper one, 114-air supply pipe, 115-air blowing pipe, 116-guide plate, 211-sleeve, 212-scraper two, 213-rotating rod, 214-breaking rod, 215-bump, 216-paddle plate. DETAILED DESCRIPTION

[0019] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0020] Example 1 A wastewater treatment device based on flotation separation, such as Figure 1-Figure 6 As shown, it includes a cylinder 1 and an inlet and outlet unit; the cylinder 1 is connected to the inlet and outlet unit; the inlet and outlet unit is composed of a sewage pipe 2, a drainage pipe 1 3 and a drainage pipe 2 4; the cylinder 1 is connected to the sewage pipe 2; the cylinder 1 is connected to the drainage pipe 1 3, and the sewage pipe 2 is located below the drainage pipe 1 3; the bottom of the cylinder 1 is connected to the drainage pipe 2 4, and the location of the drainage pipe 2 4 is lower than the bottom of the cylinder 1; It also includes a driving motor 5, a rotating rod 6, a multi-stage electric push rod 7, a partition plate 8, an electric slide rail 9, a rotating plate 10, a filter screen 11, an air pipe 12 and an aeration pipe 13; the bottom of the cylinder 1 is fixedly connected to the driving motor 5; the cylinder 1 is rotatably connected to the rotating rod 6, and the output shaft of the driving motor 5 is fixedly connected to the rotating rod 6; a plurality of multi-stage electric push rods 7 are fixedly connected to the bottom of the cylinder 1; all the telescopic parts of the multi-stage electric push rods 7 are commonly fixedly connected to a partition plate 8, and the partition plate 8 is slidably connected to the inner wall of the cylinder 1; the partition plate 8 is provided with a plurality of connecting grooves 801; the partition plate 8 is fixedly connected to the electric slide rail 9; the electric The sliding part of the movable slide rail 9 is fixedly connected to a rotating plate 10; the rotating plate 10 is provided with a plurality of through grooves, and a filter screen 11 is fixedly connected to each through groove of the rotating plate 10; the partition plate 8 is fixedly connected to a plurality of air pipes 12, the air pipes 12 are fixedly connected to the telescopic part of the multi-stage electric push rod 7, and the air pipes 12 pass through the cylinder 1 and are connected to the external pump; six aeration pipes 13 distributed in a circular array are fixedly connected to the upper surface of the partition plate 8, and the aeration pipe 13 is connected to the air pipe 12, and bubbles are generated through the aeration pipe 13, and the bubbles float upward in the wastewater, bringing the suspended particles in the wastewater to the water surface to form scum.

[0021] It also includes a movable plate 101 and an elastic rope 102; each rotating plate 10 has two movable plates 101 rotatably connected to the through slot through a torsion spring, and the movable plates 101 are located above the filter screen 11; the two movable plates 101 on the same through slot are each fixedly connected to two elastic ropes 102.

[0022] It also includes a scum frame 111, a fixing block 112 and a scraper 113; the scum frame 111 is fixedly connected to the upper side of the cylinder 1, and the scum frame 111 is connected to a water outlet pipe; the rotating rod 6 is fixedly connected to the fixing block 112, and the fixing block 112 is rotatably connected to the mounting frame of the cylinder 1; the fixing block 112 is fixedly connected to four scrapers 113.

[0023] The lower part of the fixing block 112 is set to a cone shape with a small bottom and a large top. When the scum separated by flotation floats upward, the conical fixing block 112 guides the scum to float on the surface of the fixing block 112, so that it is away from the center of the cylinder 1 for easy collection in the scum frame 111.

[0024] The scraper 113 is configured as an arc-shaped plate, and when rotating, it can throw the scum to the surroundings, so that the scum is collected in the scum frame 111.

[0025] It also includes an air supply pipe 114, an air blowing pipe 115 and a guide plate 116; the air supply pipe 114 is fixedly connected to the fixing block 112; the air supply pipe 114 is connected to six air blowing pipes 115 distributed in a circular array, and the air blowing pipes 115 are fixedly connected to the fixing block 112; a guide plate 116 is fixedly connected to the pipe opening of each air blowing pipe 115.

[0026] First, a pump is used to manually pass wastewater from the sewage pipe 2 into the cylinder 1. When the cylinder 1 is full of wastewater, the water intake is stopped and the sewage pipe 2 is closed. When water is intaken, the multi-stage electric push rod 7 is controlled to drive the partition plate 8, the electric slide rail 9, the rotating plate 10 and the filter screen 11, as well as other connected parts to move to the top of the sewage pipe 2, and just higher than the sewage pipe 2, and the electric slide rail 9 is controlled to drive the rotating plate 10 and the filter screen 11 to rotate, so that the filter screen 11 is aligned with the connecting groove 801; as the wastewater in the cylinder 1 is gradually discharged, the filter screen 11 is aligned with the connecting groove 801. As the amount of wastewater increases gradually, the wastewater in the cylinder 1 passes through the filter screen 11 and the connecting groove 801 from bottom to top, and the larger deposited impurities in the wastewater are filtered and separated by the filter screen 11, so that the deposited impurities are under the partition plate 8. When the water inlet is stopped later, the larger deposited impurities in the wastewater are deposited under the partition plate 8 and precipitated at the bottom of the cylinder 1. Compared with the existing wastewater filtering from top to bottom through the filter screen 11, the impurities filtered out will accumulate and adhere to the filter screen 11, causing the filter screen 11 to be blocked, reducing its effect on the wastewater. Filtering effect: the device allows wastewater to pass through the filter screen 11 from bottom to top, and filters larger deposited impurities in the wastewater. The larger impurities filtered out will settle downward under the action of their own gravity and will not accumulate and adhere to the surface of the filter screen 11, effectively reducing the impurity content attached to the surface of the filter screen 11, thereby ensuring the filtering effect of the filter screen 11. At the same time, since the wastewater is in a state of continuously entering through the sewage pipe 2, the filter screen 11 can be continuously impacted during the wastewater passing process to prevent impurities from accumulating and adhering to the filter screen 11, causing it to be blocked; and considering that when the wastewater is passed into the cylinder 1, some larger impurities are deposited at a slower speed. During the process of the filter screen 11 filtering the wastewater, the impurities that are deposited more slowly will still stay and adhere to the lower side of the filter screen 11, blocking the filter screen 11 and reducing the overall filtering efficiency. Therefore, during the process of the filter screen 11 filtering the wastewater, the electric slide rail 9 is controlled to drive the rotating plate 10 and the filter screen 11 to rotate, and the rotating plate 10 drives the movable plate 101 and the elastic rope 102 to rotate, such as Figure 4 As shown, when the rotating plate 10 and the movable plate 101 rotate, the movable plate 101 disengages from the connecting groove 801 and rotates downward under the restriction of the partition plate 8, and under the action of the elastic rope 102, the two movable plates 101 above the filter screen 11 are driven to rotate downward. The rotation of the movable plate 101 drives the wastewater to flow downward, and then backwashes the filter screen 11 below, flushing away the impurities attached to the lower side of the filter screen 11, avoiding the existence of some deposited impurities that will adhere to the lower side of the filter screen 11 and affect the filtering effect of the filter screen 11, and under the guidance of the movable plate 101, the suspended impurities passing through the filter screen 11 do not contact the connecting groove 801, avoiding the floating impurities that will adhere to and stop on the connecting groove 801.

[0027] At the same time, during the sedimentation process, the multi-stage electric push rod 7 is controlled to drive the partition plate 8, the electric slide rail 9, the rotating plate 10 and the filter screen 11 to gradually move downward, and the wastewater is filtered through the filter screen 11, and the larger sediment impurities in the wastewater are filtered and gathered under the partition plate 8. When the partition plate 8 moves to the lower part of the cylinder 1, it stops moving, and then the electric slide rail 9 is controlled to drive the rotating plate 10 and the filter screen 11 to rotate, so that the filter screen 11 and the connecting groove 801 are staggered. At this time, the partition plate 8 and the rotating plate 10 separate the cylinder 1 into two layers, and then the external pump is controlled to pass the gas into the air supply pipe 12. The gas enters the aeration pipe 13 from the air supply pipe 12, and generates bubbles in the wastewater above the partition plate 8 through the aeration pipe 13. During the floating process of the bubbles, tiny suspended impurities in the wastewater are attached. , and brings it to the water surface to form scum, while the wastewater below the partition plate 8 is separated by the partition plate 8 and the rotating plate 10, and the air flotation separation above the partition plate 8 drives the wastewater to surge, and does not interfere with the wastewater below the partition plate 8, so that the wastewater below the partition plate 8 is in a static state and is subjected to sedimentation separation treatment; the cylinder 1 is divided into an upper and lower layer by the partition plate 8 and the rotating plate 10, so that when the air flotation separation is carried out above the partition plate 8, the wastewater below the partition plate 8 is simultaneously subjected to sedimentation separation. Compared with the existing wastewater that is first subjected to sedimentation treatment and then to air flotation treatment, the efficiency of wastewater treatment can be improved, and by controlling the downward movement distance of the partition plate 8, the height of the sediment below the partition plate 8 can be reduced, the time required for the sediment to settle and move downward can be reduced, and the efficiency of the sedimentation and separation treatment of the wastewater can be accelerated.

[0028] As bubbles are generated in the wastewater of the aeration pipe 13, the tiny suspended impurities in the wastewater are separated by air flotation. At the same time, the driving motor 5 is controlled to drive the rotating rod 6 to rotate, and the rotating rod 6 drives the fixed block 112 and the scraper 113, as well as other connected parts to rotate. The scraper 113 rotates to scrape the scum floating on the water surface, and the scum is scraped into the scum frame 111 for collection; however, the scum floats from the bottom to the top, and the scum near the rotating rod 6 is more difficult to be scraped out than the scum at the edge. Therefore, the lower part of the fixed block 112 is set to a cone shape with a small bottom and a large top. When the scum separated by air flotation floats upward, , guided by the conical fixing block 112, the scum can float on the surface of the fixing block 112. At the same time, the external pump is controlled to pass gas into the air supply pipe 114 and blow it out from the blowing pipe 115. The gas is blown out along the surface of the fixing block 112 through the blowing pipe 115, and the scum on the surface of the fixing block 112 is blown to the edge of the cylinder 1, so that it can be easily scraped out by the scraper 113 and collected in the scum frame 111. A guide piece 116 is provided at the pipe mouth of the blowing pipe 115, which can guide the blown gas and prevent the scum from entering the blowing pipe 115 when the blowing pipe 115 stops working.

[0029] After the treatment of the wastewater is completed, the wastewater after flotation treatment is discharged through the drain pipe 3 by opening the drain pipe 1, and the treated wastewater above the partition plate 8 and the rotating plate 10 can be discharged through the drain pipe 13 by controlling the movement of the partition plate 8 and the rotating plate 10; then, the drain pipe 24 is opened, and since the position of the drain pipe 24 is the lowest point at the bottom of the cylinder 1, the impurities deposited at the bottom of the cylinder 1 and the wastewater remaining in the impurities can be discharged through the drain pipe 24. After the discharge of the wastewater and impurities is completed, new wastewater is introduced through the sewage pipe 2 for treatment, and when the scum collected in the scum frame 111 is too much, it is discharged through the outlet pipe set on the scum frame 111.

[0030] Example 2 On the basis of Example 1, Figure 4 and Figure 7-Figure 8 As shown, it also includes a sleeve 211 and a second scraper 212; the rotating rod 6 is provided with a spline groove 601; the rotating rod 6 is slidably connected to the sleeve 211, and the sleeve 211 is rotatably connected to the electric slide rail 9; the sleeve 211 is fixedly connected to the second scraper 212, and the second scraper 212 is fitted with the bottom of the rotating plate 10 and the filter screen 11, the sleeve 211 can move up and down with the partition plate 8 and the electric slide rail 9, and when the rotating rod 6 rotates, it can drive the sleeve 211 and the second scraper 212 to rotate, and the scum accumulated at the bottom of the rotating plate 10 and the filter screen 11 is scraped away by the rotation of the second scraper 212, ensuring that the scum passes through the filter screen 11 normally.

[0031] The scraper 212 is arranged to be inclined, and the scum scraped off by the scraper 212 can pass over the scraper 212 along the inclined scraper 212, preventing the scraped scum from accumulating in large quantities on the front side of the scraper 212, making it more difficult for the scum to pass through the filter 11.

[0032] It also includes a rotating rod 213, a breaking rod 214, a protrusion 215 and a paddle 216; the scraper 212 is rotatably connected to the rotating rod 213; the rotating rod 213 is fixedly connected to a plurality of breaking rods 214; a plurality of protrusions 215 are fixedly connected to the bottom of the electric slide rail 9; the rotating rod 213 is fixedly connected to a plurality of paddles 216, and the position of the protrusion 215 corresponds to the position of the paddle 216. When the sliding sleeve 211 drives the scraper 212 and the rotating rod 213 to revolve around the rotating rod 6, the protrusion 215 paddles the paddle 216 of the rotating rod 213, so that the rotating rod 213 rotates, and the larger scum is broken up by the rotation of the rotating rod 213, so that it is easy to pass through the filter screen 11.

[0033] On the basis of the above-mentioned embodiment 1, when the wastewater is filtered through the filter screen 11, some larger impurities will be mixed with tiny suspended impurities and stay at the bottom of the rotating plate 10, and the suspended impurities in the wastewater are easy to gather into larger suspended impurity clusters. The larger suspended impurity clusters are difficult to pass through the filter screen 11, and are easy to stay and adhere to the rotating plate 10 or the bottom of the filter screen 11, so that the suspended impurities in the wastewater are not fully separated; therefore, in the process of filtering the wastewater by the filter screen 11, when the electric slide rail 9 drives the rotating plate 10 to rotate, the driving motor 5 is controlled to drive the rotating rod 6 to rotate at the same time, and the rotating rod 6 drives the sliding sleeve 211 and the scraper 212 to rotate, and the rotation speed of the rotating plate 10 is different from the rotation speed of the scraper 212, and the scraper 212 is used to rotate the bottom of the rotating plate 10. The rotating plate 10 is scraped to scrape off the impurities remaining at the bottom of the rotating plate 10, so that the tiny suspended impurities therein can be driven by the wastewater to pass through the filter screen 11 again, flow to the top of the partition plate 8, and then be separated from the wastewater by flotation separation; at the same time, when the rotating rod 6 drives the scraper plate 212 and the rotating rod 213 to revolve, the paddle 216 of the rotating rod 213 contacts the protrusion 215, and under the prying of the protrusion 215, the rotating rod 213 rotates, and the scraper plate 212 is set in an inclined shape, and the scum scraped off by the scraper plate 212 can move along the inclined scraper plate 212 and contact the rotating rod 213. The larger suspended impurity clusters gathered in the wastewater are broken up by the rotation of the rotating rod 213, so that they are easy to pass through the filter screen 11, thereby improving the efficiency of flotation separation.

[0034] A wastewater treatment method based on flotation separation comprises the following steps: Step 1: First, control the multi-stage electric push rod 7 to drive the partition plate 8 and the rotating plate 10, as well as other connected parts to move to the top of the sewage pipe 2, and just higher than the sewage pipe 2, and control the electric slide rail 9 to drive the rotating plate 10 and the filter screen 11 to rotate, so that the filter screen 11 is aligned with the connecting groove 801; Step 2: Then, the wastewater is pumped from the sewage pipe 2 into the cylinder 1 manually, and the wastewater passes through the filter screen 11 from bottom to top to filter out the larger deposited impurities in the wastewater; Step 3: When the cylinder 1 is filled with wastewater, the water intake is stopped, and then the partition plate 8 is controlled to move down to the lower part of the cylinder 1, and the electric slide rail 9 is controlled to drive the rotating plate 10 and the filter screen 11 to rotate, so that the filter screen 11 and the connecting groove 801 are staggered, and the cylinder 1 is divided into two layers, and then the aeration pipe 13 is controlled to generate bubbles in the wastewater above the partition plate 8 to perform flotation separation, while the wastewater below the partition plate 8 is in a static state and is subjected to sedimentation separation treatment; Step 4: After the wastewater treatment is completed, the wastewater after flotation treatment is discharged through the drain pipe 1 3 , and the impurities deposited at the bottom of the cylinder 1 and the wastewater remaining in the impurities are discharged through the drain pipe 2 4 .

[0035] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A wastewater treatment device based on flotation separation, comprising a cylinder (1) and an inlet and outlet unit; the cylinder (1) is connected to the inlet and outlet unit for water intake and drainage; wherein: It also includes a driving motor (5), a rotating rod (6), a multi-stage electric push rod (7), a partition plate (8), an electric slide rail (9), a rotating plate (10), a filter screen (11), an air pipe (12) and an aeration pipe (13); the cylinder (1) is fixedly connected to the driving motor (5); the cylinder (1) is rotatably connected to the rotating rod (6), and the output shaft of the driving motor (5) is fixedly connected to the rotating rod (6); a plurality of multi-stage electric push rods (7) are fixedly connected to the bottom of the cylinder (1); the telescopic parts of all the multi-stage electric push rods (7) are commonly fixedly connected to a partition plate (8), and the partition plate (8) is slidably connected to the inner wall of the cylinder (1); the partition plate (8) is provided with a plurality of connecting grooves (801); the partition plate (8) is fixedly connected to an electric slide rail (9); the sliding portion of the electric slide rail (9) is fixedly connected to a rotating plate (10); the rotating plate (10) is provided with a plurality of through grooves, and a filter screen (11) is fixedly connected in each through groove of the rotating plate (10); the partition plate (8) is fixedly connected to a plurality of air supply pipes (12), the air supply pipes (12) are fixedly connected to the telescopic portion of the multi-stage electric push rod (7), and the air supply pipes (12) penetrate the cylinder (1) and are connected to an external pump; the partition plate (8) is fixedly connected to a plurality of aeration pipes (13), and the aeration pipes (13) are connected to the air supply pipes (12).

2. A wastewater treatment equipment based on flotation separation according to claim 1, characterized in that: It also includes a movable plate (101) and an elastic rope (102); the through slot of each rotating plate (10) is rotatably connected to two movable plates (101) via a torsion spring, and the movable plates (101) are located above the filter screen (11); the two movable plates (101) on the same through slot are each fixedly connected to two elastic ropes (102).

3. The wastewater treatment equipment based on flotation separation according to claim 1 is characterized in that: It also comprises a scum frame (111), a fixing block (112) and a scraper blade (113); the cylinder (1) is fixedly connected to the scum frame (111), and the scum frame (111) is connected to a water outlet pipe; the rotating rod (6) is fixedly connected to the fixing block (112), and the fixing block (112) is rotatably connected to a mounting frame of the cylinder (1); the fixing block (112) is fixedly connected to a plurality of scrapers blades (113) for scraping off scum.

4. The wastewater treatment equipment based on flotation separation according to claim 3 is characterized in that: The lower part of the fixing block (112) is arranged in a conical shape with a smaller bottom and a larger top.

5. A wastewater treatment equipment based on flotation separation according to any one of claims 3-4, characterized in that: The scraper plate 1 (113) is configured as an arc-shaped plate.

6. The wastewater treatment equipment based on flotation separation according to claim 5 is characterized in that: It also includes an air supply pipe (114), an air blowing pipe (115) and a guide piece (116); the air supply pipe (114) is fixedly connected to the fixing block (112); the air supply pipe (114) is connected to a plurality of air blowing pipes (115), and the air blowing pipes (115) are fixedly connected to the fixing block (112); and a guide piece (116) is fixedly connected to the pipe opening of each air blowing pipe (115).

7. The method for treating wastewater based on flotation separation according to claim 1, characterized in that: It also includes a sliding sleeve (211) and a second scraper (212); the rotating rod (6) is provided with a spline groove (601); the rotating rod (6) is slidably connected to the sliding sleeve (211), and the sliding sleeve (211) is rotatably connected to the electric slide rail (9); the sliding sleeve (211) is fixedly connected to the second scraper (212), and the second scraper (212) is in contact with the rotating plate (10) and the bottom of the filter screen (11).

8. The wastewater treatment equipment based on flotation separation according to claim 7 is characterized in that: The scraper 2 (212) is arranged in an inclined shape.

9. The wastewater treatment equipment based on flotation separation according to claim 7 is characterized in that: It also includes a rotating rod (213), a breaking rod (214), a protrusion (215) and a paddle (216); the scraper plate 2 (212) is rotatably connected to the rotating rod (213); the rotating rod (213) is fixedly connected to a plurality of breaking rods (214); a plurality of protrusions (215) are fixedly connected to the bottom of the electric slide rail (9); the rotating rod (213) is fixedly connected to a plurality of paddles (216), and the position of the protrusion (215) corresponds to the position of the paddle (216).

10. A wastewater treatment device based on flotation separation according to claims 1-9, characterized in that: A wastewater treatment method based on flotation separation comprises the following steps: Step 1: First, control the multi-stage electric push rod (7) to drive the partition plate (8) and the rotating plate (10), as well as other connected parts, to move to the top of the sewage pipe (2) and just above the sewage pipe (2), and control the electric slide rail (9) to drive the rotating plate (10) and the filter screen (11) to rotate, so that the filter screen (11) is aligned with the connecting groove (801); Step 2: Then, wastewater is manually pumped from the sewage pipe (2) into the cylinder (1), and the introduced wastewater passes through the filter screen (11) from bottom to top to filter out larger deposited impurities in the wastewater; Step 3: When the cylinder (1) is filled with wastewater, water intake is stopped, and then the partition plate (8) is controlled to move downward to the lower part of the cylinder (1), and the electric slide rail (9) is controlled to drive the rotating plate (10) and the filter screen (11) to rotate, so that the filter screen (11) and the connecting groove (801) are staggered, and the cylinder (1) is divided into two layers, the upper and lower layers, and then the aeration pipe (13) is controlled to generate bubbles in the wastewater above the partition plate (8) to perform flotation separation, while the wastewater below the partition plate (8) is in a static state and is subjected to sedimentation separation treatment; Step 4: After the wastewater treatment is completed, the wastewater after flotation treatment is discharged through the drain pipe 1 (3), and the impurities deposited at the bottom of the cylinder (1) and the wastewater remaining in the impurities are discharged through the drain pipe 2 (4).

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