Air floating type sewage filtering device

Abstract

An air floating type sewage filtering device comprises an air floating filtering device and a deoiling device, the air floating filtering device 1 is arranged on a base, a plurality of supporting rods are arranged on the periphery of the upper end face of the base, the top ends of the supporting rods are fixedly connected to a top seat, and a hydraulic cylinder is fixedly installed on the top seat; a hydraulic rod of the hydraulic cylinder penetrates through the top seat and is fixedly connected with a movable base plate below the top seat, supporting rods penetrate through the periphery of the movable base plate, and the movable base plate and the supporting rods are connected in a sliding mode. The deoiling device can move up and down along with the movable base plate under the driving of the hydraulic rod so as to correspond to the change of the water level in the lower air floatation tank, and the air floatation filtering device is connected with the clear water tank through a water outlet pipe with a switch. The sewage filtering device is suitable for filtering sewage with different water volumes, dirty oil can be removed more cleanly and quickly, and the efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, and in particular relates to an air-floating type sewage filtering device. Background Art

[0002] In the field of sewage treatment, oily wastewater is one of the common industrial wastewaters, which is very harmful to the environment. It mainly comes from industrial sectors such as petroleum, petrochemicals, steel, coking, gas generating stations and mechanical processing. Flotation is one of the commonly used methods for treating oily wastewater, which has the advantages of good effect and good water quality. However, the existing flotation water purification equipment has water level requirements when in use. For a single large amount of water, it needs to be treated in multiple times. For a low amount of water, it cannot be directly treated below the required water level. The water volume needs to be raised to reach the required water line before it can be treated in the plant. In addition, it is not easy to clean the oil stains at the edge of the water surface and the contact part with the water tank, and the oil stains are easily contaminated on the water tank. Utility Model Content

[0003] The utility model aims to provide an air-floating sewage filtering device with an oil scraping and oil removing device capable of adjusting the oil scraping and oil removing devices up and down, so as to solve the technical problem that the existing air-floating sewage treatment device has a single requirement on the water level.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A flotation type sewage filtering device comprises an air flotation filtering device and an oil removal device, wherein the air flotation filtering device 1 is arranged on a base, a plurality of support rods are arranged around the upper end surface of the base, the top ends of the support rods are fixedly connected to the top seat, a hydraulic cylinder is fixedly installed on the top seat, the hydraulic rod of the hydraulic cylinder passes through the top seat and is fixedly connected to a movable pad below it, the movable pad is passed around by the support rods, and the two are slidably connected, the lower end of the movable pad is connected to the oil removal device through a fixed bracket, the oil removal device is below the air flotation filtering device, the oil removal device can move up and down with the movable pad driven by the hydraulic rod to correspond to the water level change in the lower flotation tank, and the air flotation filtering device is connected to the clean water tank through a water outlet pipe with a switch.

[0006] Furthermore, the flotation filtration device includes an air flotation box, which is a box body with an opening facing upward. A plurality of foaming plates connected to an air compressor through pipelines are arranged on the bottom surface of the air flotation box, a water outlet pipe inlet is arranged at the bottom end of the side wall of the air flotation box, a sewage inlet is arranged at the bottom end of the inner side wall of the air flotation box, a detachable filter screen is installed at the sewage inlet outlet, a heating device is also arranged on the inner wall of the air flotation box, and a plurality of box scrapers are arranged on the upper part of the inner wall of the air flotation box, and the box scrapers can slide on the inner wall of the air flotation box.

[0007] Furthermore, the oil removal device includes an oil belt, which is arranged above the flotation tank, and the upper and lower ends of the oil belt are respectively connected to a driving wheel and a driven wheel, wherein the driving wheel is installed on the oil belt driving motor, and the oil belt driving motor and the driven wheel are both connected to a fixed bracket, and an oil scraping device is provided on the oil belt.

[0008] Furthermore, the oil scraper device is arranged in the middle and upper part of the downward side of the oil-stained belt when the oil-stained belt rotates, and is connected to the fixed bracket. The oil scraper device includes oil scraper plates arranged in an inverted V shape on the front and rear surfaces of the oil-stained belt. Only a gap is left between the upper end surfaces of the front and rear oil scraper plates so that the oil-stained belt can pass through. The upper end surfaces of the oil scraper plates are tightly attached to the corresponding surfaces of the oil-stained belt. An oil collecting trough is arranged below the oil scraper plates. The outlet end of the oil collecting trough extends outward and an oil collecting funnel is arranged at the outlet. The oil collecting funnel is connected to the oil pipeline below.

[0009] Furthermore, the upper end of the box scraper is fixedly connected to a sliding bracket, which includes an upper cross bar, and the two ends of the cross bar are respectively connected to a downward telescopic rod and a fixed rod, wherein the telescopic rod is telescopically adjustable in length, the lower end of the telescopic rod is connected to the box scraper, and the lower end of the fixed rod is connected to a rotating belt outside the flotation box, and the rotating belt is installed on a slide at the upper end of the outer wall of the flotation box, and a scraper drive motor connected to the rotating belt is arranged below the slide.

[0010] Furthermore, the box scraper is inclined at different angles in the front and rear directions with respect to the inner wall of the air flotation box in the horizontal direction, and the angle of the forward direction is greater than 90°.

[0011] Furthermore, a filter element with multiple filter layers is arranged in the clean water tank, and the filter element is detachably connected to the outlet end of the water outlet pipe.

[0012] The utility model air flotation type sewage filtering device is suitable for filtering sewage with various water volumes, and the dirty oil is removed more cleanly, more quickly and more efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the air-floating sewage filtering device of the utility model;

[0014] Figure 2 It is a half-section structural schematic diagram of the left view of the air-floating sewage filtering device of the utility model;

[0015] Explanation of the marks in the figure: 1. flotation filtration device; 11. flotation box; 12. foaming board; 13. sewage inlet; 14. filter screen; 15. heating device; 16. water outlet pipe; 2. oil removal device; 21. oil belt; 22. driving wheel; 23. driven wheel; 24. oil belt driving motor; 3. sliding bracket; 31. cross bar; 32. telescopic rod; 33. fixed rod; 4. box scraper; 41. scraper driving motor; 42. rotating belt; 43. slideway; 5. oil scraper device; 51. oil scraper plate; 52. oil collecting tank; 6. clean water tank; 61. filter element; 7. oil collecting funnel; 71. oil pipeline; 8. hydraulic cylinder; 81. hydraulic rod; 82. top seat; 83. movable pad; 84. support rod; 85. base; 86. fixed bracket. DETAILED DESCRIPTION

[0016] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of the air flotation type sewage filtering device of the utility model in conjunction with the accompanying drawings.

[0017] like Figure 1-2 As shown, the utility model air flotation sewage filtering device includes an air flotation filtering device 1, which is arranged on a base 85, and an oil removal device 2 is arranged above the air flotation filtering device 1. The oil removal device 2 is installed below the movable pad 83 through a fixed bracket 86. The center position of the upper end surface of the movable pad 83 is fixedly connected to the lower end of the hydraulic rod 81, and the upper end of the hydraulic rod 81 is connected to the hydraulic cylinder 8, and the hydraulic cylinder 8 is fixed on the top seat 82. A plurality of fixedly connected support rods 84 are arranged around the top seat 82. The support rod 84 passes through the movable pad 83, and the lower end is fixed on the base 85 below the air flotation filtering device 1 to provide supporting force for the top seat 82. The support rod 84 is slidably connected to the movable pad 83. The movable pad 83 can slide up and down on the support rod 84 under the cooperation of the hydraulic cylinder 8 and the hydraulic rod 81. A clean water tank 6 is arranged on one side of the base 85, and the air flotation filtering device 1 and the clean water tank 6 are connected through a water outlet pipe 16 with a switch.

[0018] The flotation filtration device 1 includes an air flotation box 11, which is a cylindrical box with an opening upward. A plurality of foaming plates 12 are arranged on the bottom surface of the air flotation box 11. The foaming plates 12 are connected to an air compressor through a pipeline. When working, under the action of the air compressor, the foaming plates 12 will emit dense small bubbles, which drive the dirty oil molecules in the sewage to float to the water surface, and then be collected and removed by the oil removal device 2 above. The inlet of the water outlet pipe 16 is arranged at the bottom end of the inner wall of the air flotation box 11, and the inlet of the water outlet pipe 16 is arranged at the bottom end of the inner wall of the air flotation box 11. A sewage inlet 13 is provided at the lower part of the side wall of the flotation tank 11 on the other side opposite to the inlet, through which sewage can be injected into the flotation tank 11, and a detachable filter 14 is installed at the outlet of the sewage inlet 13 inside the flotation tank 11, and the filter 14 can filter the waste residue in the sewage. A heating device 15 is also provided on the inner wall of the flotation tank next to the sewage inlet 13. When the temperature is too low, the dirty oil in the sewage is easy to solidify into blocks. The sewage is heated by the heating device 15 to prevent the dirty oil in the sewage from solidifying. The air flotation tank 11 is provided with a plurality of box scrapers 4 on the upper part of the inner wall thereof in a circumferential direction. The box scrapers 4 are slidably connected to the inner wall of the air flotation tank 11 through a sliding bracket 3 fixedly connected at the upper end thereof. The other end of the sliding bracket 3 is connected to a rotating belt 42 outside the air flotation tank 11. A slideway 43 is provided on the upper end of the outer wall of the air flotation tank 11. The slideway 43 is fixedly sleeved on the outer wall of the air flotation tank 11 in a ring-shaped manner in a circumferential direction. A rotating belt 42 is provided on the slideway 43. A scraper drive motor 41 is installed on the outer wall of the flotation box 11 below the slide 43. The scraper drive motor 41 provides power for the rotating belt 42. Under the action of the scraper drive motor 41, the rotating belt 42 can rotate around the periphery of the flotation box 11 along the direction of the slide 43. The sliding bracket 3 moves with the rotation of the rotating belt 42, driving the box scraper 4 connected to its other end to slide in the flotation box 11 along the circumferential direction of the inner wall of the box. The box scraper 4 scrapes off the dirty oil on the inner wall of the flotation box 11 during sliding.

[0019] The sliding bracket 3 includes an upper cross bar 31, and the two ends of the cross bar 31 are respectively connected to a telescopic rod 32 and a fixed rod 33, the telescopic rod 32 and the fixed rod 33 are both perpendicular to the cross bar 31, parallel to each other, and both are vertically downward in the horizontal and vertical directions, wherein the other end of the fixed rod 33 is fixedly connected to the rotating belt 42, the telescopic rod 32 is divided into two sections, the length of the telescopic rod 32 can be adjusted by adjusting the relative positions of the upper and lower sections, and the position of the box scraper 4 on the inner wall of the flotation tank 11 can be moved up and down by adjusting the telescopic rod 32, the position of the box scraper 4 needs to correspond to the water surface position of the sewage in the flotation tank 11, with the different amount of sewage in the flotation tank 11 and the change of water level, the upper and lower positions of the box scraper 4 are adjusted accordingly, and the dirty oil in the contact part between the water surface of different amounts of sewage in the flotation tank 11 and the inner wall of the box can be scraped off.

[0020] The box scraper 4 is not perpendicular to the inner wall of the flotation tank 11 in the horizontal direction, but is inclined at different angles to the inner wall of the flotation tank 11. When the box scraper 4 moves in a circle, the angle between its forward direction and the inner wall of the flotation tank 11 is greater than 90°. In this way, the box scraper 4 can easily guide the dirty oil scraped from the inner wall of the flotation tank to gather in the middle of the water surface of the flotation tank 11, so that it is easier to be sucked away by the oil removal device above.

[0021] A filter element 61 is provided in the clean water tank 6. The filter element 61 is a cylindrical shape with a hollow interior and an open upper end. The side walls and bottom walls of the filter element 61 are composed of multiple filter layers. The upper part of the filter element 61 is connected to the outlet end of the water outlet pipe 16, and the two are detachably connected. When the switch provided on the water outlet pipe 61 is turned on, the water in the flotation tank 11 that has been degreased is filtered again through the filter element 61, and filtered clean water can be obtained in the clean water tank 6.

[0022] The degreasing device 2 includes an oiling belt 21, which is arranged in the middle position just above the air flotation tank 11. The upper end of the oiling belt 21 is connected to the driving wheel 22 of the oiling belt driving motor 24, and the oiling belt driving motor 24 is installed on the fixed bracket 86. The fixed bracket 86 below the driving wheel 22 is connected with a driven wheel 23. The lower end of the oiling belt 21 is connected to the driven wheel 23. When the oiling belt driving motor 24 is powered on, the driving wheel 22 rotates accordingly. The shaft end of the driven wheel 23 is provided with a bearing, which is fixed on the fixed bracket 86. The driven wheel 23 is fixed in position by the bearing. The oil-sticking belt 21 is rotated by the rotation of the driving wheel 22, and the lower end of the oil-sticking belt 21 contacts the sewage surface in the flotation tank 11. When the dirty oil in the sewage contacts the oil-sticking belt 21, the dirty oil will be coated on the surface of the oil-sticking belt 21, and the oil will be taken away by the rotation of the oil-sticking belt 21. The oil-sticking belt 21 is provided with an oil scraper 5, and the oil scraper 5 scrapes the dirty oil on the rotating oil-sticking belt 21, so that the oil-sticking belt 21 can rotate downward to continue to be coated with dirty oil in the sewage below. The box scraper 4 and the oil-sticking belt 21 work together to more quickly and thoroughly treat the dirty oil in the sewage.

[0023] The oil scraping device 5 is arranged at the middle and upper part of the oily belt 21. The oil scraping device 5 includes an oil scraping plate 51. The oil scraping plate 51 is arranged in an inclined shape with the left side higher than the right side, and is arranged on the downward side when the oily belt 21 rotates. Two oil scraping plates 51 are arranged in pairs on the front and rear sides of the oily belt 21. The two oil scraping plates 51 are arranged in an inverted V shape on the front and rear sides of the oily belt 21 in the vertical direction. The two oil scraping plates 51 cooperate with each other. A gap is left between the two oil scraping plates 51 for the oily belt 21 to pass through, and the upper end surfaces of the two oil scraping plates 51 are tightly attached to the corresponding surface of the oily belt 21. The gap between the two upper end surfaces of the two oil scraping plates 51 is only enough for the oily belt 21 to pass through. When the oily belt 21 rotates from top to bottom, the dirty oil on the oily belt 21 will be scraped off. The oil plate 51 scrapes down, and an oil collecting trough 52 is arranged below the oil scraping plate 51. The oil collecting trough 52 is fixedly connected to the lower end of the oil scraping plate 51 in a surrounding groove shape, and extends outward in the lower end direction of the oil scraping plate 51. The oil collecting trough 52 is connected to the fixed bracket 86, and the fixed bracket 86 provides support for the entire oil scraping device 5. At the same time, the lower end of the extended end of the oil collecting trough 52 is open, and an oil collecting funnel 7 is arranged at the opening. The oil collecting funnel 7 is fixedly connected below the opening of the extended end of the oil collecting trough 52. An oil delivery pipe 71 is connected below the oil collecting funnel 7. The oil delivery pipe 71 is a retractable hose. The collected dirty oil is transported to the oil collecting tank through the oil delivery pipe 71, which is convenient for the subsequent centralized treatment of the dirty oil.

[0024] When in use, firstly, sewage is injected into the flotation tank 11 through the sewage inlet 13, and the sliding bracket 3 and the hydraulic rod 81 are adjusted according to the amount of sewage, so that the position of the box scraper 4 corresponds to the water surface position of the sewage, and the lower end position of the oil-sucking belt 21 is also adjusted to correspond to the sewage water level. At this time, the oil-sucking belt drive motor 24, the scraper drive motor 41 and the external air compressor are started, wherein the air compressor injects air into the foaming plate 12, so that the foaming plate 12 generates small bubbles. As the small bubbles rise, the dirty oil molecules in the sewage are driven to float to the water surface together, and at the same time, the scraper drive motor 41 is used to drive the oil-sucking belt 21 to move the oil-sucking belt 21 to the surface of the water. Under the action of the motor 41, the sliding bracket 3 drives the box scraper 4 to slide in a circular direction on the inner wall of the flotation box 11. The box scraper 4 scrapes off the dirty oil on the inner wall of the flotation box 11 that contacts the sewage surface during the sliding process. Under the joint action of the foaming plate 12 and the box scraper 4, the dirty oil inside the sewage and at the edge of the water surface gathers toward the center of the water surface. At the same time, under the action of the oil-sucking belt driving motor 24, the oil-sucking belt 21 rotates accordingly, and the dirty oil on the lower end of the oil-sucking belt 21 rotates away from the sewage. When the dirty oil rotates to the oil scraping device 5, the dirty oil is scraped off. The plate 51 scrapes off the surface of the oil-stained belt 21 and is collected by the oil collecting tank 52, flows into the oil collecting funnel 7 along the guide of the collecting tank 52, and then reaches the oil collecting tank through the oil pipe 71, so as to be concentrated for subsequent centralized treatment. As the oil-stained belt 21 continues to rotate, the dirty oil in the sewage in the flotation tank 11 below is continuously covered, taken away from the sewage, scraped off, and collected. When the temperature is too low, the dirty oil is easy to solidify. After the sewage is injected into the flotation tank 11, the heating device 15 is turned on. The heat emitted by the heating device 15 increases the temperature of the sewage, and the dirty oil in the sewage is heated due to the increase in temperature. The solidified waste oil melts after the water temperature rises, and then the above-mentioned waste oil removal steps are repeated until all the waste oil in the sewage is removed. After the waste oil in the sewage is completely removed, the switch of the water outlet pipe 16 is turned on, so that the water after the waste oil is removed flows out of the flotation tank 11. At this time, there may be other impurities remaining in the water. The water in the flotation tank 11 enters the filter element 61 through the water outlet pipe 16, and the impurities remaining in the water are filtered and removed by the filter element 61. Clean water seeps out of the filter element 61 and gathers in the clean water tank 6 outside the filter element 61, waiting for subsequent secondary utilization.

[0025] The degreasing device 2 of the air-floating sewage filter device of the utility model can move up and down under the action of the hydraulic cylinder 8 and the hydraulic rod 81. Different from the prior art which requires a certain water level, the degreasing device of the air-floating sewage filter device of the utility model is suitable for sewage treatment with different water volumes, and has a wider range of applications. The use of the oil-sucking belt 21 in conjunction with the box scraper enables the air-floating sewage filter device of the utility model to remove the dirty oil in the sewage more quickly and cleanly, with higher degreasing efficiency. After use, no dirty oil will remain in the box, saving the cost and time of cleaning the air-floating box 11, and the filter can be quickly put back into the next work, thereby improving its use efficiency.

[0026] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An air flotation sewage filtering device, characterized in that: The invention comprises an air flotation filter device (1) and an oil removal device (2). The air flotation filter device (1) is arranged on a base (85). A plurality of support rods (84) are arranged around the upper end surface of the base (85). The top ends of the support rods (84) are fixedly connected to a top seat (82). A hydraulic cylinder (8) is fixedly installed on the top seat (82). The hydraulic rod (81) of the hydraulic cylinder (8) passes through the top seat (82) and is fixedly connected to a movable pad (83) below the top seat. The movable pad (83) has four The support rod (84) passes through the periphery and the two are slidably connected. The lower end of the movable pad (83) is connected to the degreasing device (2) through a fixed bracket (86). Below the degreasing device (2) is an air flotation filter device (1). Driven by the hydraulic rod (81), the degreasing device (2) can move up and down with the movable pad (83) to correspond to the change of the water level in the lower air flotation box (11). The air flotation filter device (1) is connected to the clean water tank (6) through a water outlet pipe (16) with a switch.

2. The air flotation sewage filtering device according to claim 1, characterized in that: The flotation filtering device (1) comprises an air flotation box (11), the air flotation box (11) is a box body with an opening facing upward, a plurality of foaming plates (12) connected to an air compressor through pipelines are arranged on the bottom surface of the air flotation box (11), a water outlet pipe (16) is arranged at the bottom end of the inner wall of the air flotation box (11), a sewage inlet (13) is arranged at the lower part of the side wall of the air flotation box (11), and a detachable filter screen (14) is installed at the outlet of the sewage inlet (13), a heating device (15) is also arranged on the inner wall of the air flotation box (11), and a plurality of box body scrapers (4) are arranged on the upper part of the inner wall of the air flotation box (11), and the box body scrapers (4) can slide on the inner wall of the air flotation box (11).

3. The air flotation type sewage filtering device according to claim 2, characterized in that: The oil removal device (2) comprises an oiling belt (21), which is arranged above the flotation tank (11), and the upper and lower ends of the oiling belt (21) are respectively connected to a driving wheel (22) and a driven wheel (23), wherein the driving wheel (22) is mounted on an oiling belt driving motor (24), and the oiling belt driving motor (24) and the driven wheel (23) are both connected to a fixed bracket (86), and an oil scraping device (5) is arranged on the oiling belt (21).

4. The air flotation type sewage filtering device according to claim 3 is characterized in that: The oil scraping device (5) is arranged at the middle upper part of the downward side of the oiling belt (21) when the oiling belt (21) rotates, and is connected to the fixed bracket (86). The oil scraping device (5) comprises oil scraping plates (51) arranged in an inverted V shape on the front and rear surfaces of the oiling belt (21). Only a gap is left between the upper end surfaces of the front and rear oil scraping plates (51) so that the oiling belt (21) can pass through. The upper end surfaces of the oil scraping plates (51) are tightly attached to the corresponding surface of the oiling belt (21). An oil collecting trough (52) is arranged below the oil scraping plates (51). The outlet end of the oil collecting trough (52) extends outward and an oil collecting funnel (7) is arranged at the outlet. The lower part of the oil collecting funnel (7) is connected to the oil delivery pipe (71).

5. The air flotation sewage filtering device according to claim 2, characterized in that: The upper end of the box scraper (4) is fixedly connected to a sliding bracket (3), and the sliding bracket (3) includes an upper cross bar (31), and the two ends of the cross bar (31) are respectively connected to a downward telescopic rod (32) and a fixed rod (33), wherein the telescopic rod (32) is telescopically adjustable in length, the lower end of the telescopic rod (32) is connected to the box scraper (4), and the lower end of the fixed rod (33) is connected to a rotating belt (42) outside the flotation box (11), and the rotating belt (42) is installed on a slideway (43) at the upper end of the outer wall of the flotation box (11), and a scraper driving motor (41) connected to the rotating belt (42) is arranged below the slideway (43).

6. The air flotation type sewage filtering device according to claim 2, characterized in that: The box body scraper (4) is inclined at different angles in the front and rear directions with respect to the inner wall of the air flotation box (11) in the horizontal direction, and the angle in the forward direction is greater than 90°.

7. The air flotation sewage filtering device according to claim 1, characterized in that: A filter element (61) with multiple filter layers is arranged in the clean water tank (6), and the filter element (61) is detachably connected to the outlet end of the water outlet pipe (16).

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