Rotational flow dissolved air flotation degreaser

Abstract

The invention relates to the technical field of oily wastewater treatment, and discloses a rotational flow dissolved air flotation degreaser which comprises a degreasing assembly and a tank body, a liquid inlet pipe and a liquid outlet pipe are fixed on the tank body, a water weir plate is fixed on the inner wall of the tank body, an oil collecting barrel is arranged on the inner side of the water weir plate, and an oil weir plate is arranged at the top of the oil collecting barrel; the adjusting assembly is arranged on the oil weir plate and comprises an adjusting piece, and the adjusting piece comprises a supporting rod fixed to the top of the oil collecting barrel. The oil tank has the beneficial effects that when an oil layer in the tank body is thickened, the height of the oil weir plate can be reduced through the adjusting assembly, so that the oil layer can quickly cross the oil weir plate to enter the oil collecting barrel without being accumulated to the original thickness, and further the situation that the oil layer is too thick and is brought into a purified water area by rotational flow, and the oil content of a purified water outlet exceeds the standard is avoided; the height of the oil weir plate can be increased through the adjusting assembly, so that a large amount of purified water is prevented from crossing the weir plate along with the thin oil layer and entering the oil collecting cylinder to obviously increase the water content of discharged oil.

Description

Technical Field

[0001] This invention relates to the field of oily wastewater treatment technology, and in particular to a cyclone dissolved air flotation oil remover. Background Technology

[0002] In the field of industrial oily wastewater treatment, cyclone dissolved air flotation technology is widely used in the front-end oil removal process of oily wastewater due to its advantages such as high separation efficiency of tiny oil droplets, small equipment footprint, and low operating cost. The cyclone dissolved air flotation equipment mainly consists of two parts: a DGF tank and an auxiliary dissolved air unit. The tank is divided into a flotation zone and a clean water zone from top to bottom. The tank is equipped with two symmetrically arranged tangential liquid inlets, an annular oil weir plate, an annular water weir plate, and an independent oil collection cylinder. The production water to be treated, containing nitrogen microbubbles, enters tangentially along the tank wall. The velocity difference between the two tangential water flows forms a stable vortex in the flotation zone. The turbulent environment generated by the vortex promotes the collision and adsorption of nitrogen microbubbles with tiny oil droplets in the water. The nitrogen microbubbles carry the tiny oil droplets to the surface at a uniform speed and agglomerate into large oil droplets, forming an oil layer floating on the liquid surface. The oil weir plate is set between the flotation zone and the oil collection cylinder to intercept the oil layer and guide it into the oil collection cylinder, and finally discharge it through the oil outlet at the bottom of the oil collection cylinder.

[0003] In practical applications, the height of the oil weir plate in cyclone dissolved air flotation oil removal equipment cannot be adjusted, resulting in poor adaptability of the equipment to fluctuations in operating conditions. The oil content of the wastewater to be treated often fluctuates. When the oil content of the influent increases, the oil layer in the flotation zone forms faster and becomes thicker. The fixed-height oil weir plate cannot lower the overflow threshold in time, resulting in an excessively thick oil layer that is carried into the clean water zone by the cyclone, causing the oil content at the clean water outlet to exceed the standard. When the oil content of the influent decreases, the oil layer becomes thinner, and the fixed-height oil weir plate cannot raise the overflow threshold. This causes a large amount of clean water to cross the weir plate with the thin oil layer and enter the oil collection cylinder, resulting in a significant increase in the water content of the discharged oil and increasing the burden on subsequent sludge dewatering treatment. Summary of the Invention

[0004] In view of the problems existing in the above and / or existing cyclone dissolved air flotation oil removers, the present invention is proposed.

[0005] Therefore, the problem that this invention aims to solve is that the height of the oil weir plate cannot be adjusted, resulting in poor adaptability of the equipment to fluctuations in operating conditions.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a cyclone dissolved air flotation oil remover, comprising an oil removal component including a tank, wherein an inlet pipe and an outlet pipe are fixed on the tank, a water weir plate is fixed on the inner wall of the tank, an oil collecting cylinder is provided on the inner side of the water weir plate, and an oil weir plate is provided on the top of the oil collecting cylinder; An adjustment assembly, disposed on the oil weir plate, includes an adjustment component. The adjustment component includes a support rod fixed to the top of the oil collecting cylinder. A support frame is fixed to the inner side of the support rod. A movable rod is inserted into the support frame. A connecting sleeve is fixed to the outer side of the movable rod. A rotating sleeve is rotatably connected to the outer side of the connecting sleeve. A connecting column is fixed to the outer side of the rotating sleeve. The other end of the connecting column is fixed to the inner wall of the oil weir plate.

[0007] In a preferred embodiment of the cyclone dissolved air flotation oil remover of the present invention, the adjusting component further includes a rotating component, the rotating component including a rotating column inserted into the movable rod, the rotating column having a first spiral groove, a first fixed shaft fixed to the inner wall of the movable rod, the first fixed shaft sliding in the first spiral groove, a positioning rod rotatably connected to the top of the rotating column, and the end of the positioning rod being fixed to the inner wall of the tank.

[0008] In a preferred embodiment of the vortex dissolved air flotation oil remover of the present invention, a movable sleeve is provided on the outer side of the rotating column, a second fixed shaft is fixed on the movable sleeve, a second spiral groove is provided on the rotating column, and the second fixed shaft is movably connected to the second spiral groove.

[0009] In a preferred embodiment of the vortex dissolved air flotation oil remover of the present invention, the adjusting component further includes a trigger, the trigger including a stabilizing frame fixed to the inner wall of the tank, a fixing rod inserted into the stabilizing frame, and a float fixed to the bottom of the fixing rod.

[0010] As a preferred embodiment of the vortex dissolved air flotation oil remover of the present invention, the overall density of the float is 0.9~0.95 g / cm³.

[0011] In a preferred embodiment of the cyclone dissolved air flotation oil remover of the present invention, a stabilizing rod is fixed to the bottom of the positioning rod, a rotating rod is rotatably connected to the end of the stabilizing rod via a rotating shaft, a connecting rod is fixed to one side of the movable sleeve and one side of the fixed rod, a sliding shaft is fixed to one side of the connecting rod, and a sliding groove is provided at both ends of the rotating rod, with the sliding shaft movably connected to the sliding groove.

[0012] In a preferred embodiment of the cyclone dissolved air flotation oil remover of the present invention, the adjusting component further includes a rotating component, the rotating component includes a fixed sleeve fixed to the top of the support rod, a third fixed shaft is fixed on the fixed sleeve, a third spiral groove is opened on the rotating sleeve, and the third fixed shaft is movably connected to the third spiral groove.

[0013] In a preferred embodiment of the cyclone dissolved air flotation oil remover of the present invention, the adjusting component further includes a sealing element, the sealing element including a fixing frame fixed to the bottom of the oil weir plate, a sealing ring provided in the fixing frame, and the sealing ring fitting against the outside of the oil collecting cylinder.

[0014] As a preferred embodiment of the cyclone dissolved air flotation oil remover of the present invention, wherein: a squeezing ring is provided inside the fixed frame, a force-bearing block is fixed on one side of the squeezing ring, an insert plate is inserted into the fixed frame, and a squeezing groove is provided on one side of the insert plate.

[0015] In a preferred embodiment of the cyclone dissolved air flotation oil separator of the present invention, a locking block is fixed at the bottom of the insert plate, a slide rail is fixed on the outside of the oil collecting cylinder, the locking block is engaged with the slide rail and is movably connected to the slide rail.

[0016] The beneficial effects of this invention are as follows: When the oil layer in the tank thickens, the height of the oil weir plate can be reduced by adjusting the component, so that the oil layer does not need to accumulate to its original thickness before quickly passing over the oil weir plate and entering the oil collection cylinder. This avoids the oil layer being too thick and being carried into the clean water area by the vortex, causing the oil content at the clean water outlet to exceed the standard. When the oil layer thins, the height of the oil weir plate can be increased by adjusting the component, thereby preventing a large amount of clean water from passing over the weir plate with the thin oil layer and entering the oil collection cylinder, which would cause the water content of the discharged oil to increase significantly. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a structural diagram of a cyclone dissolved air flotation oil remover.

[0018] Figure 2 This is a cross-sectional view of the cyclone dissolved air flotation oil separator.

[0019] Figure 3 This is a structural diagram of the trigger element of a cyclone dissolved air flotation oil remover.

[0020] Figure 4 For cyclone dissolved air flotation oil removal device Figure 3 Enlarged view of the structure at point A in the middle.

[0021] Figure 5 This is a cross-sectional structural diagram of the oil weir plate in a cyclone dissolved air flotation oil remover.

[0022] Figure 6 This is a cross-sectional view of the fixed sleeve of a cyclone dissolved air flotation oil remover.

[0023] Figure 7 This is a cross-sectional structural diagram of the movable rod of a cyclone dissolved air flotation oil remover.

[0024] Figure 8 This is a cross-sectional structural diagram of the sealing components of a cyclone dissolved air flotation oil remover.

[0025] Figure 9 This is a structural diagram of the sealing components of a cyclone dissolved air flotation oil remover. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments. Example

[0029] Reference Figure 1 , Figure 2 and Figures 5-7 This is the first embodiment of the present invention, which provides a cyclone dissolved air flotation oil remover. The cyclone dissolved air flotation oil remover includes an oil removal component 1, including a tank 11. An inlet pipe 12 and an outlet pipe 13 are fixed on the tank 11. There are two inlet pipes 12, which are tangentially arranged. A circulation pump and an ejector are arranged externally. The circulation pump circulates and pressurizes part of the purified water and enters the ejector. Nitrogen enters through the top of the ejector. The jet action disperses the nitrogen. A bubble mixer is set in the water supply line. The nitrogen-containing water from the ejector is mixed evenly with the water in the bubble mixer. Before the evenly mixed nitrogen enters the tank 11, a bubble cutter is set to further cut the bubbles in the water into smaller bubbles. A tangentially inserted air flotation cylinder is set at the water inlet. The water with evenly mixed nitrogen and small bubbles enters the tank 11 tangentially from the inner wall of the cylinder to form a cyclone, ensuring that the water containing small bubbles is turbulent inside. The small bubbles repeatedly contact small oil droplets and float to the surface.

[0030] A water weir plate 14 is fixed to the inner wall of the tank body 11, an oil collecting cylinder 15 is provided on the inner side of the water weir plate 14, and an oil weir plate 16 is provided on the top of the oil collecting cylinder 15.

[0031] Production water containing nitrogen gas, evenly mixed, enters the flotation zone through two symmetrical tangential inlet pipes 12. The two streams entering tangentially to the cylinder wall generate a swirling flow, causing tiny nitrogen gas dissolved in the liquid to carry tiny oil droplets to the surface evenly. This further separates the tiny oil droplets in the water, eventually forming larger oil droplets that float on the surface of the liquid. These larger droplets then pass through the oil weir plate 16 into the oil collection cylinder 15 and are discharged from the equipment. The purified water, after removing the small oil droplets, enters the purified water zone through the water weir plate 14 and then goes to the downstream walnut shell filter through the outlet pipe 13. This is existing technology, and this solution will not be described in detail here. Moreover, those skilled in the art can clearly understand the working principle.

[0032] Adjustment component 2 is set on oil weir plate 16 and includes adjustment component 21. Adjustment component 21 includes support rod 211 fixed to the top of oil collecting cylinder 15. Support frame 212 is fixed inside support rod 211. Movable rod 213 is inserted into support frame 212. Movable rod 213 is rectangular and is movably connected to support frame 212.

[0033] A connecting sleeve 214 is fixed to the outside of the movable rod 213. A rotating sleeve 215 is rotatably connected to the outside of the connecting sleeve 214 via a bearing. A connecting column 216 is fixed to the outside of the rotating sleeve 215. The other end of the connecting column 216 is fixed to the inner wall of the oil weir plate 16. The connecting column 216 is used to fix the rotating sleeve 215 to the oil weir plate 16.

[0034] When the movable rod 213 moves up and down, it drives the rotating sleeve 215 to move up and down through the connecting sleeve 214, and the rotating sleeve 215 drives the oil weir plate 16 to move up and down. Thus, when the oil layer thickness changes, the height of the oil weir plate 16 can be adjusted to adapt to the fluctuation of working conditions and improve the oil-water separation effect. Example

[0035] Reference Figures 3-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0036] Specifically, the adjustment assembly 2 also includes a rotating component 22, which includes a rotating column 221 inserted into the movable rod 213. The rotating column 221 has a first spiral groove 221-1. A first fixed shaft 222 is fixed to the inner wall of the movable rod 213. The first fixed shaft 222 slides in the first spiral groove 221-1. A positioning rod 223 is rotatably connected to the top of the rotating column 221 through a bearing. The end of the positioning rod 223 is fixed to the inner wall of the tank 11. The positioning rod 223 is used to support and position the rotating column 221.

[0037] Specifically, a movable sleeve 224 is fitted on the outer side of the rotating column 221, and a second fixed shaft 225 is fixed on the movable sleeve 224. A second spiral groove 221-2 is opened on the rotating column 221, and the second fixed shaft 225 is movably connected to the second spiral groove 221-2.

[0038] Specifically, the adjustment component 2 also includes a trigger 23, which includes a stabilizing frame 231 fixed to the inner wall of the tank 11, a fixing rod 232 inserted into the stabilizing frame 231, and a float 233 fixed to the bottom of the fixing rod 232.

[0039] Specifically, the overall density of float 233 is between 0.9 and 0.95 g / cm³, which is between oil and water. This ensures that float 233 will not float completely in the pure oil layer (density < 0.9 g / cm³) nor sink in the water layer (density > 1.0 g / cm³). It will be stably attached to the oil-water interface. Small changes in the interface will directly cause float 233 to move up and down, and it also has a certain weight.

[0040] When the oil content in the influent increases and the air flotation separation efficiency improves, the oil layer thickness will increase. Since the total liquid level remains unchanged, the water layer thickness will decrease. The oil-water interface will move upward with the compression of the oil layer and push the float 233 upward.

[0041] Conversely, when the oil content in the incoming water decreases and the oil layer formation rate slows down, the oil layer thickness decreases and the water layer thickness increases. The oil-water interface will move downward as the oil layer contracts, causing the float 233 to move downward.

[0042] A stabilizing rod 234 is fixed to the bottom of the positioning rod 223. A rotating rod 235 is rotatably connected to the end of the stabilizing rod 234 via a rotating shaft. The center of the rotating rod 235 is rotatably connected to the stabilizing rod 234 via a rotating shaft. A connecting rod 236 is fixed to one side of the movable sleeve 224 and the other side of the fixed rod 232. A sliding shaft 237 is fixed to one side of the connecting rod 236. Sliding grooves 235-1 are provided at both ends of the rotating rod 235. The sliding shaft 237 is movably connected to the sliding groove 235-1.

[0043] As the oil layer thickness increases, the oil-water interface pushes the float 233 upward. The float 233 then moves the fixed rod 232 and connecting rod 236 upward. The connecting rod 236, through the cooperation of the sliding shaft 237 and the slide groove 235-1, drives the rotating rod 235 to rotate. The other end of the rotating rod 235, through the cooperation of another set of sliding shafts 237 and the slide groove 235-1, drives another connecting rod 236 downward. This causes the connecting rod 236 to move the movable sleeve 224 downward. The movable sleeve 224 then drives the second fixed shaft 225 in the second spiral groove 221-2. The inner sliding mechanism, through the cooperation of the two, drives the rotating column 221 to rotate. When the rotating column 221 rotates, it will drive the movable rod 213 to move downward through the cooperation of the first fixed shaft 222 and the first spiral groove 221-1. In turn, the movable rod 213 can drive the rotating sleeve 215 and the oil weir plate 16 to move downward, so that the height of the oil weir plate 16 is reduced. After the height of the oil weir plate 16 is reduced, the oil layer does not need to accumulate to the original thickness and can quickly pass over the oil weir plate 16 and enter the oil collecting cylinder 15. This avoids the oil layer being too thick and being carried into the clean water area by the vortex, causing the oil content of the clean water outlet to exceed the standard.

[0044] Conversely, when the oil layer thickness decreases and the oil-water interface drops, the float 233 will move downward. At this time, the movable rod 213 will drive the oil weir plate 16 to move upward and increase the height of the oil weir plate 16, thereby preventing a large amount of clean water from passing over the oil weir plate 16 with the thin oil layer and entering the oil collecting cylinder 15, which would cause the water content of the discharged oil to increase significantly. Example

[0045] Reference Figure 3 , Figure 6 and Figure 8 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0046] Specifically, the adjustment assembly 2 also includes a rotating component 24, which includes a fixed sleeve 241 fixed to the top of the support rod 211. A third fixed shaft 242 is fixed on the fixed sleeve 241. A third spiral groove 215-1 is opened on the rotating sleeve 215. The third fixed shaft 242 is movably connected to the third spiral groove 215-1. The third fixed shaft 242 is located in the middle position of the third spiral groove 215-1. The pitch of the third spiral groove 215-1 is relatively large.

[0047] When the rotating sleeve 215 moves up and down, the third fixed shaft 242 slides within the third spiral groove 215-1. The interaction between the two causes the rotating sleeve 215 to rotate, which in turn drives the oil weir plate 16 to rotate. This allows the oil weir plate 16 to rotate at a small angle during its upward or downward movement. The overflow port of the static oil weir plate 16 is prone to blockage due to the accumulation of sludge, resulting in poor oil discharge. When rotating at a small angle, the overflow port of the oil weir plate 16 will move slightly along the circumference. The flowing oil layer will wash away the accumulated sludge, preventing blockage of the weir port and ensuring smooth and continuous oil discharge. Furthermore, the swirling flow within the tank 11 may cause local thickening of the oil layer. The angle rotation can dynamically adjust the overflow direction of the oil weir plate 16, allowing the overflow port to be aligned with the thick oil layer area, improving the overall oil discharge efficiency and reducing the risk of oil contamination in clean water.

[0048] Specifically, the adjusting component 2 also includes a sealing element 25, which includes a fixing frame 251 fixed to the bottom of the oil weir plate 16. A sealing ring 252 is provided inside the fixing frame 251. The sealing ring 252 fits against the outside of the oil collecting cylinder 15. The sealing ring 252 is elastic and can fit tightly against the outside of the oil collecting cylinder 15 when the oil weir plate 16 is stationary. This is used to increase the sealing between the oil weir plate 16 and the oil collecting cylinder 15 and prevent the oil-water mixture that has not been completely separated from below from entering the interior of the oil collecting cylinder 15 through the gap between the two.

[0049] Specifically, a compression ring 253 is provided inside the fixed frame 251. The compression ring 253 is arc-shaped and there are four of them, which are evenly distributed in a ring outside the sealing ring 252. A force-bearing block 254 is fixed on one side of the compression ring 253. An insert plate 255 is inserted into the fixed frame 251. A compression groove 255-1 is opened on one side of the insert plate 255. The bottom of the inner wall of the compression groove 255-1 is inclined. The number of force-bearing blocks 254 corresponds to the number of insert plates 255.

[0050] When the oil weir plate 16 moves up or down, the inclined surface of the extrusion groove 255-1 will press against the force block 254, and push the force block 254 to move. This causes the force block 254 to drive the extrusion ring 253 to press against the sealing ring 252, thereby making the sealing ring 252 fit more tightly with the oil collecting cylinder 15. As a result, when the oil weir plate 16 moves dynamically, the sealing performance between the oil collecting cylinder 15 and the oil weir plate 16 can be further improved, preventing leakage.

[0051] Specifically, a locking block 256 is fixed to the bottom of the insert plate 255, and a slide rail 257 is fixed to the outside of the oil collecting cylinder 15. The locking block 256 is engaged with the slide rail 257 and is movably connected to the slide rail 257. Through the cooperation of the slide rail 257 and the locking block 256, the insert plate 255 is supported and positioned so that the insert plate 255 can rotate with the oil weir plate 16 without moving up and down.

[0052] In use, as the oil layer thickness increases, the oil-water interface pushes the float 233 upward. The float 233 then moves the fixed rod 232 and connecting rod 236 upward. The connecting rod 236, through the cooperation of the sliding shaft 237 and the slide groove 235-1, drives the rotating rod 235 to rotate. The other end of the rotating rod 235, through the cooperation of another set of sliding shafts 237 and the slide groove 235-1, drives another connecting rod 236 downward. This causes the connecting rod 236 to move the movable sleeve 224 downward. The movable sleeve 224 then drives the second fixed shaft 225 in the second spiral groove 22. The sliding mechanism 1-2, through the cooperation of the two, drives the rotating column 221 to rotate. When the rotating column 221 rotates, it will drive the movable rod 213 to move downward through the cooperation of the first fixed shaft 222 and the first spiral groove 221-1. In turn, the movable rod 213 can drive the rotating sleeve 215 and the oil weir plate 16 to move downward, so that the height of the oil weir plate 16 is reduced. After the height of the oil weir plate 16 is reduced, the oil layer does not need to accumulate to the original thickness and can quickly pass over the oil weir plate 16 and enter the oil collecting cylinder 15. This avoids the oil layer being too thick and being carried into the clean water area by the vortex, causing the oil content of the clean water outlet to exceed the standard.

[0053] Conversely, when the oil layer thickness decreases and the oil-water interface drops, the float 233 will move downward. At this time, the movable rod 213 will drive the oil weir plate 16 to move upward and increase the height of the oil weir plate 16, thereby preventing a large amount of clean water from passing over the oil weir plate 16 with the thin oil layer and entering the oil collecting cylinder 15, which would cause the water content of the discharged oil to increase significantly.

[0054] When the rotating sleeve 215 moves up and down, the third fixed shaft 242 slides within the third spiral groove 215-1. The interaction between the two causes the rotating sleeve 215 to rotate, which in turn drives the oil weir plate 16 to rotate. This allows the oil weir plate 16 to rotate at a small angle during its upward or downward movement. The overflow port of the static oil weir plate 16 is prone to blockage due to the accumulation of sludge, resulting in poor oil discharge. When rotating at a small angle, the overflow port of the oil weir plate 16 will move slightly along the circumference. The flowing oil layer will wash away the accumulated sludge, preventing blockage of the weir port and ensuring smooth and continuous oil discharge. Furthermore, the swirling flow within the tank 11 may cause local thickening of the oil layer. The angle rotation can dynamically adjust the overflow direction of the oil weir plate 16, allowing the overflow port to be aligned with the thick oil layer area, improving the overall oil discharge efficiency and reducing the risk of oil contamination in clean water.

[0055] When the oil weir plate 16 moves up or down, the inclined surface of the extrusion groove 255-1 will press against the force block 254, and push the force block 254 to move. This causes the force block 254 to drive the extrusion ring 253 to press against the sealing ring 252, thereby making the sealing ring 252 fit more tightly with the oil collecting cylinder 15. As a result, when the oil weir plate 16 moves dynamically, the sealing performance between the oil collecting cylinder 15 and the oil weir plate 16 can be further improved, preventing leakage.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A hydrocyclone dissolved air flotation oil remover characterized by: The utility model relates to a kind of oil removal assembly and adjusting assembly, including, Oil removal assembly (1), including tank body (11), inlet pipe (12) and outlet pipe (13) are fixed on the tank body (11), weir plate (14) is fixed on the inner wall of the tank body (11), oil collecting cylinder (15) is arranged in the inner side of the weir plate (14), oil weir plate (16) is arranged at the top of the oil collecting cylinder (15); Adjusting assembly (2) is arranged on the oil weir plate (16), including adjusting part (21), the adjusting part (21) includes support rod (211) fixed at the top of the oil collecting cylinder (15), support frame (212) is fixed on the inner side of the support rod (211), movable rod (213) is inserted in the support frame (212), connecting sleeve (214) is fixed on the outer side of the movable rod (213), rotating sleeve (215) is rotatably connected on the outer side of the connecting sleeve (214), connecting column (216) is fixed on the outer side of the rotating sleeve (215), the other end of the connecting column (216) is fixed with the inner wall of the oil weir plate (16).

2. The rotating flow dissolved air flotation oil remover according to claim 1, characterized in that: The adjusting assembly (2) further includes rotating part (22), the rotating part (22) includes rotating column (221) inserted into the movable rod (213), the rotating column (221) is provided with first helical groove (221-1), the first fixed shaft (222) is fixed on the inner wall of the movable rod (213), the first fixed shaft (222) is slidably arranged in the first helical groove (221-1), the rotating column (221) is rotatably connected with positioning rod (223) at the top end, and the end of the positioning rod (223) is fixed with the inner wall of the tank body (11).

3. The rotating flow dissolved air flotation oil remover according to claim 2, characterized in that: The rotating column (221) is provided with movable sleeve (224) on the outer side, the second fixed shaft (225) is fixed on the movable sleeve (224), the rotating column (221) is provided with second helical groove (221-2), and the second fixed shaft (225) is movably connected with the second helical groove (221-2).

4. The rotating flow dissolved air flotation oil remover according to claim 3, characterized in that: The adjusting assembly (2) further includes trigger (23), the trigger (23) includes stabilizing frame (231) fixed on the inner wall of the tank body (11), the fixed rod (232) is inserted into the stabilizing frame (231), and the float (233) is fixed on the bottom of the fixed rod (232).

5. The rotating flow dissolved air flotation oil remover according to claim 4, characterized in that: The overall density of the float (233) is 0.9-0.95 g / cm³.

6. The rotating flow dissolved air flotation oil remover according to claim 4 or 5, characterized in that: The positioning rod (223) is fixed with stabilizing rod (234) at the bottom, the rotating rod (235) is rotatably connected with the rotating shaft at the end of the stabilizing rod (234), the connecting rod (236) is fixed on one side of the movable sleeve (224) and one side of the fixed rod (232), the sliding shaft (237) is fixed on one side of the connecting rod (236), the sliding groove (235-1) is formed in both ends of the rotating rod (235), and the sliding shaft (237) is movably connected with the sliding groove (235-1).

7. The rotating flow dissolved air flotation oil remover according to claim 6, characterized in that: The adjusting assembly (2) further comprises a rotating piece (24), the rotating piece (24) comprises a fixed sleeve (241) fixed on the top of the supporting rod (211), a third fixed shaft (242) is fixed on the fixed sleeve (241), a third spiral groove (215-1) is formed on the rotating sleeve (215), and the third fixed shaft (242) is movably connected with the third spiral groove (215-1).

8. The rotating flow dissolved air flotation oil remover according to claim 7, characterized in that: The adjusting assembly (2) further comprises a sealing piece (25), the sealing piece (25) comprises a fixed frame (251) fixed on the bottom of the oil weir plate (16), a sealing ring (252) is arranged in the fixed frame (251), and the sealing ring (252) is attached to the outer side of the oil collecting cylinder (15).

9. The rotating flow dissolved air flotation oil remover according to claim 8, characterized in that: An extrusion ring (253) is arranged in the fixed frame (251), a stress block (254) is fixed on one side of the extrusion ring (253), an insertion plate (255) is inserted into the fixed frame (251), and an extrusion groove (255-1) is formed on one side of the insertion plate (255).

10. The rotating flow dissolved air flotation oil remover according to claim 9, characterized in that: A clamping block (256) is fixed on the bottom of the insertion plate (255), a sliding rail (257) is fixed on the outer side of the oil collecting cylinder (15), the clamping block (256) is clamped and movably connected with the sliding rail (257).

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