Low-oil-content sewage treatment device
By using carbon rods and DC converter destabilization and adsorption components in wastewater treatment devices, the high cost problem in treating low-concentration oily wastewater is solved, achieving low-cost and high-efficiency oil-water separation, which is suitable for industries such as petrochemicals, machinery manufacturing, and food processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-10
AI Technical Summary
Existing technologies face a challenge in balancing treatment effectiveness and cost when treating low-concentration oily wastewater. In particular, traditional oil removal tank equipment is large in size, consumes a lot of energy, and is complex to maintain, resulting in high operating costs and affecting the water environment and the stability of the treatment system.
The destabilizing component, consisting of carbon rods and a DC converter, uses a DC electric field to induce the directional migration of oil droplets. Combined with an adsorption component and a post-treatment component, it achieves oil-water separation. The structure is simple, can modify existing tanks, and reduces costs.
It achieves efficient separation of low-concentration oily wastewater, reduces treatment costs, and ensures the stability and environmental friendliness of the wastewater treatment system. It is suitable for industries such as petrochemicals, machinery manufacturing, and food processing.
Smart Images
Figure CN223983555U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of sewage treatment especially to a low oil content sewage treatment device. BACKGROUND
[0002] With the acceleration of industrialization, the problem of low-concentration oil-containing sewage discharge has gradually attracted widespread attention, especially in the petroleum chemical industry, machinery manufacturing and food processing industries. Low-concentration oil-containing sewage generally refers to sewage with low oil content, usually between tens of milligrams and hundreds of milligrams per liter. Although its oil concentration is relatively low, if it is not effectively treated, it will still have a negative impact on the water environment and subsequent treatment processes. Untreated low-concentration oil-containing sewage may form an oil film, hindering gas-liquid contact and solid-liquid separation, increasing the load of filtration and adsorption processes, and reducing overall treatment efficiency. In addition, oil substances may inhibit the growth and metabolism of microorganisms in biological treatment units, affecting biodegradation, causing the treatment system to be unstable, and even failing to meet standards. Therefore, the treatment of low-concentration oil-containing sewage is not only the need of environmental protection, but also the key to ensuring the normal operation of the sewage treatment system. Although many enterprises choose to treat low-concentration oil-containing sewage through oil removal tanks (such as air flotation tanks, oil-water separators, etc.), relying solely on oil removal tanks often results in high operating costs, as they require a large floor area, complex equipment, and high energy consumption and frequent equipment maintenance. This makes the economic efficiency of oil removal tanks poor in long-term operation, especially in cases where the amount of sewage is large, requiring multiple tanks to be operated in parallel, further increasing investment and operating costs.
[0003] Therefore, how to control the treatment cost while ensuring the treatment effect has become the core problem of current technical development. How to find a balance between treatment effect and cost is still a major challenge for low-concentration oil-containing sewage treatment technology. The solution to this problem will help reduce industrial pollution, improve resource recycling rate, and promote the development of the water treatment industry towards a more green and sustainable direction. SUMMARY
[0004] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a low oil content sewage treatment device, the sewage treatment device includes pool body, break stable component, adsorption component and post-processing component, through making the break stable component include carbon rod and direct current converter connected through wire, through direct current field to promote the directional migration of oil droplets in the electric field, realize the break stable of oil in water, through the adsorption component adsorbs and separates the oil dirt on the surface of sewage, the device structure is simple, can realize the transformation of the existing pool body, can guarantee the oil removal efficiency without affecting the processing function of the original pool body, and the sewage treatment cost is low, realizes the low concentration oil-containing sewage low cost green disposal.
[0005] A low-oil-content wastewater treatment device according to an embodiment of the present invention includes: a tank body, the tank body including an inlet and an outlet, and a destabilization zone, an adsorption zone, and a post-treatment zone arranged sequentially in the direction from the inlet to the outlet; a destabilization component, the destabilization component including a carbon rod and a DC converter connected by a wire, the carbon rod being located in the destabilization zone and adapted to be immersed in the oil-containing wastewater in the destabilization zone; and an adsorption component, the adsorption component including an adsorption device, a roller shaft, and an oil-water tray, the adsorption device including a drive mechanism, a transmission mechanism, and an oil-absorbing component, the drive mechanism being connected to the transmission mechanism to drive the transmission mechanism to move, the oil-absorbing component being disposed on the transmission mechanism, and the oil-absorbing component being adapted to contact the surface of the oil-containing wastewater in the adsorption zone. The system adsorbs oil from the surface of oily wastewater. A roller shaft is used to squeeze the oil-absorbing component to separate the oil adsorbed by the component. An oil-water tray is located below the roller shaft to receive the oil separated from the oil-absorbing component. A post-treatment assembly includes an oil-water separation device located outside the tank. The oil-water separation device has an inlet, a first outlet, and a second outlet. The inlet is connected to the oil-water tray via an oil-water mixing pipe. The first outlet discharges the separated oil, and the second outlet discharges the separated water. The second outlet is connected to the tank via a return water pipe, which transports the water from the oil-water separation device to the post-treatment area.
[0006] According to the embodiment of the present invention, the low-oil-content wastewater treatment device includes a destabilization component comprising a carbon rod and a DC converter connected by wires. The DC electric field causes oil droplets to migrate directionally in the electric field, thereby achieving the destabilization of oil in water. The adsorption component adsorbs and separates the oil on the surface of the wastewater. The device has a simple structure and can be implemented by modifying existing tanks. It ensures oil removal efficiency without affecting the original tank's treatment function, and the wastewater treatment cost is low, achieving low-cost green treatment of low-concentration oily wastewater.
[0007] According to some embodiments of the present invention, there are multiple carbon rods, which are spaced apart and each carbon rod is placed in the up-down direction.
[0008] According to some embodiments of the present invention, the destabilizing component further includes a lifting plate, which is located in the destabilizing zone and downstream of the carbon rod, and the lifting plate extends upwardly in a direction from the upstream side to the downstream side.
[0009] According to some embodiments of the present invention, the pool body extends in the left-right direction, the water inlet is located at the left end of the pool body, and the water outlet is located at the right end of the pool body.
[0010] According to some embodiments of the present application, the transmission mechanism comprises a transmission shaft and a support frame, the support frame is arranged across the pool body, one end of the transmission shaft is rotatably arranged on the support frame, the oil absorption component is formed in an annular belt shape and is sleeved outside the transmission shaft and the support frame, the driving mechanism is connected with the transmission shaft to drive the transmission shaft to rotate, thereby driving the oil absorption component to move, the adsorption area is located directly below the support frame, and the roller shaft is arranged directly above the other end of the support frame.
[0011] According to some embodiments of the present application, the oil absorption component comprises a support belt and an oil absorption sponge, the support belt is annular and is sleeved outside the transmission shaft and the support frame, and the oil absorption sponge is fixed on one side of the support belt away from the support frame.
[0012] According to some embodiments of the present application, the support frame comprises a support frame body and a plurality of support rollers, the plurality of support rollers are arranged on the support frame body and are arranged at intervals along the extension direction of the oil absorption component, each support roller extends along the left-right direction, and the left and right ends of each support roller are rotatably connected with the support frame body through spherical joints.
[0013] According to some embodiments of the present application, the outer peripheral wall of the transmission shaft is provided with a matching protrusion, the oil absorption component is provided with a matching groove, and the matching protrusion is accommodated in the matching groove.
[0014] According to some embodiments of the present application, the post-processing assembly further comprises a dosing device, the dosing device is arranged outside the pool body and comprises a dosing device body, a medicine conveying pipe and a spray head, the medicine outlet of the dosing device body and the spray head are connected through the medicine conveying pipe, and the spray head is used for spraying liquid medicine to the post-processing area.
[0015] According to some embodiments of the present application, the dosing device body and the oil-water separation device are arranged on opposite sides in the width direction of the pool body, and / or the driving mechanism and the dosing device are located on the same side in the width direction of the pool body, and the driving mechanism and the dosing device are located on both sides of the adsorption device.
[0016] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0017] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0018] Figure 1This is a simplified view of a low-oil-content wastewater treatment device according to some embodiments of the present invention.
[0019] Figure label:
[0020] 1. Carbon rod; 2. Direct current converter;
[0021] 3. Oil-water tray; 4. Roller shaft; 5. Adsorption device; 6. Oil suction component; 7. Support roller shaft; 8. Spherical joint;
[0022] 9. Drive mechanism; 10. Lifting plate; 11. Transmission mechanism; 12. Matching protrusion; 13. Drive shaft; 14. Dosing device; 15. Dosing pipe; 16. Nozzle; 17. Oil-water mixing pipe; 18. Oil-water separation device; 19. First outlet; 20. Return water pipe; 21. Tank body; 22. Water outlet. Detailed Implementation
[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0024] Reference Figure 1 The low-oil-content wastewater treatment device according to an embodiment of the present invention includes: a tank body 21, a destabilizing component, an adsorption component, and a post-treatment component.
[0025] The tank body 21 includes an inlet and an outlet 22, as well as a destabilization zone, an adsorption zone, and a post-treatment zone arranged sequentially from the inlet to the outlet 22. Wastewater enters the tank body 21 through the inlet, passes through the destabilization zone, the adsorption zone, and the post-treatment zone in sequence, and finally leaves the tank body 21 through the outlet 22.
[0026] The destabilization component includes a carbon rod 1 and a direct current converter 2 connected by wires. The carbon rod 1 is located in the destabilization zone and is suitable for immersion in the oily wastewater within the destabilization zone. By connecting the carbon rod 1 to the direct current converter 2, the carbon rod 1 can be charged, generating a direct current electric field in the destabilization zone. This direct current electric field can disrupt the stable charge structure on the surface of the oil droplets, leading to uneven charge distribution on the surface of the oil droplets. This, in turn, promotes the directional migration of the oil droplets in the electric field, and causes demulsification and coalescence on the anode surface, thus achieving the destabilization of the oily wastewater and making it easier to separate water and oil from the oily wastewater. By immersing the carbon rod 1 in the oily wastewater in the destabilization zone, the oily wastewater collides with the carbon rod 1 during flow. The carbon rod 1 disrupts the fluid's stable state, effectively enhancing the turbulence of the oily wastewater and further accelerating its destabilization at a physical level.
[0027] The adsorption assembly includes an adsorption device 5, a roller shaft 4, and an oil-water tray 3. The adsorption device 5 includes a drive mechanism 9, a transmission mechanism 11, and an oil-absorbing component 6. The drive mechanism 9 is connected to the transmission mechanism 11 to drive the transmission mechanism 11 to move. The oil-absorbing component 6 is located on the transmission mechanism 11 and is adapted to contact the surface of the oily wastewater in the adsorption zone to adsorb the oil on the surface of the oily wastewater. The roller shaft 4 is used to squeeze the oil-absorbing component 6 to separate the oil adsorbed by the oil-absorbing component 6. The oil-water tray 3 is located below the roller shaft 4 to receive the oil separated from the oil-absorbing component 6. By setting the oil-absorbing component 6 on the transmission mechanism 11, the oil-absorbing component 6 can repeatedly absorb the oil on the surface of the oily wastewater and then be squeezed out by the roller shaft 4, allowing the oil-absorbing component 6 to be reused and reducing the treatment cost. By positioning the oil-water tray 3 below the roller shaft 4, the oil-water tray 3 can receive the oil separated from the oil suction component 6. Since the oil is a mixture of oil and water with a high oil content, further oil-water separation treatment is still required. This facilitates further processing of the oil and prevents the oil from being discharged indiscriminately and damaging the environment.
[0028] In this step, the oil in the raw wastewater is physically concentrated and stored for subsequent treatment, which can reduce the amount of oily wastewater to be treated and lower the treatment cost.
[0029] The post-treatment assembly includes an oil-water separator 18 located outside the tank body 21. The oil-water separator 18 has an inlet, a first outlet 19, and a second outlet. The inlet is connected to the oil-water tray 3 via an oil-water mixing pipe 17. The first outlet 19 discharges the separated oil, and the second outlet discharges the separated water. The second outlet is connected to the tank body 21 via a return water pipe 20, which transports the water from the oil-water separator 18 to the post-treatment area. By including the oil-water separator 18 in the post-treatment assembly, the oil-water separator 18 can absorb the oil-water mixture sucked up by the oil suction component 6. By connecting the second outlet of the oil-water separator 18 to the tank body 21 via the return water pipe 20, the oil-water separator 18 can further separate the oil and water, and then return the water to the tank body 21 via the return water pipe 20, thus saving water resources.
[0030] When the low oil content wastewater treatment device is working, the wastewater enters the tank 21 through the inlet and first passes through the destabilization zone. The destabilization device separates the oil and wastewater in the oily wastewater in the destabilization zone. After the wastewater is destabilized, it flows to the adsorption zone. The adsorption component contacts the surface of the oily wastewater and adsorbs the oil on the surface of the oily wastewater. The wastewater continues to flow to the post-treatment zone and finally leaves the tank 21 through the outlet 22. The oil absorbed by the adsorption component moves with the adsorption device 5 to the vicinity of the roller shaft 4. The roller shaft 4 squeezes the oil suction component 6, separating the oil suction component 6 from the oil. The separated oil falls into the oil-water tray 3 under its own gravity. The oil continues to flow and enters the oil-water separation device 18 through the inlet. The oil-water separation device 18 further refines and separates the oil and water in the oil, and discharges the water through the second outlet. This part of the water flows back to the tank 21 through the return water pipe 20 and merges with the water in the post-treatment zone. Finally, it leaves the tank 21 through the outlet 22. The oil is discharged through the first outlet 19 and used for subsequent treatment.
[0031] According to the embodiment of the present invention, the low-oil-content wastewater treatment device includes a destabilization component comprising a carbon rod 1 and a DC converter 2 connected by wires. The DC electric field causes oil droplets to migrate directionally in the electric field, thereby achieving the destabilization of oil in water. The adsorption component adsorbs and separates the oil on the surface of the wastewater. The device has a simple structure and can be implemented by modifying the existing tank 21. It ensures the oil removal efficiency without affecting the original treatment function of the tank 21, and the wastewater treatment cost is low, thus achieving low-cost green treatment of low-concentration oily wastewater.
[0032] According to some embodiments of this utility model, refer to Figure 1 Multiple carbon rods 1 are arranged at intervals, with each carbon rod 1 positioned vertically. By using multiple carbon rods 1 and arranging them at intervals, the carbon rods 1 can more fully disrupt the fluid's steady state, more fully enhance the turbulence of the oily wastewater, and further accelerate the destabilization of the oily wastewater at a physical level. Furthermore, the DC electric field generated by the carbon rods 1 can be stronger and more stable, more effectively destabilizing the oily wastewater. By placing each carbon rod 1 vertically, the oily wastewater within the destabilization zone can be subjected to the destabilizing effect of the carbon rods 1 in both vertical directions, resulting in more complete destabilization of the oily wastewater.
[0033] According to some embodiments of this utility model, refer to Figure 1The destabilization assembly also includes a lifting plate 10, which is located in the destabilization zone and downstream of the carbon rod 1. The lifting plate 10 extends upward at an incline from the upstream side to the downstream side. The lifting plate 10 can lift the water flow after the oily wastewater has been destabilized. By extending the lifting plate 10 upward at an incline from the upstream side to the downstream side, the lifting plate 10 can raise the oily wastewater to a certain height, so that all oil droplets in the water will move towards the water surface along the upward slope of the lifting plate 10 with the water flow direction. This facilitates the subsequent oil suction device to absorb the oil on the water surface, providing good working conditions for the oil suction device.
[0034] According to some embodiments of this utility model, refer to Figure 1 The pool body 21 extends in the left-right direction, with the inlet located at the left end and the outlet 22 located at the right end. By extending the pool body 21 in the left-right direction and having the inlet located at the left end and the outlet 22 located at the right end, it is convenient to arrange and install components such as destabilizing components, adsorption components, and post-treatment components on the pool body 21.
[0035] According to some embodiments of this utility model, refer to Figure 1 The transmission mechanism 11 includes a transmission shaft 13 and a support frame. The support frame spans across the pool body 21, and the transmission shaft 13 is rotatably mounted at one end of the support frame. The oil-absorbing component 6 is formed into an annular strip and is sleeved on the outside of the transmission shaft 13 and the support frame. The drive mechanism 9 is connected to the transmission shaft 13 to drive the transmission shaft 13 to rotate, thereby driving the oil-absorbing component 6 to move. The adsorption area is located directly below the support frame, and the roller shaft 4 is located directly above the other end of the support frame. By setting the support frame across the pool body 21, the oil-absorbing component 6 can adsorb surface oil stains on the water area spanning the pool body 21 when the oily wastewater flows, resulting in a more thorough oil absorption effect. By sleeved on the outside of the transmission shaft 13 and the support frame, the support frame can support the oil-absorbing component 6, preventing it from falling off. By connecting the drive mechanism 9 to the transmission shaft 13 to drive the transmission shaft 13 to rotate, thereby driving the oil suction component 6 to move, the rotation of the oil suction component 6 can be made more convenient, making it easier for the oil suction component 6 to circulate between the surface of the pool body 21 and the vicinity of the roller shaft 4, so that the oil suction component 6 can be recycled and the cost can be reduced.
[0036] By positioning the adsorption zone directly below the support frame and the roller 4 directly above the other end of the support frame, the roller 4 can squeeze the oil-water mixture absorbed by the oil-absorbing component 6. This oil-water mixture then falls to the side away from the tank 21 under its own gravity, thus separating the oil from the adsorbed pure water and preventing the adsorbed oil-water mixture from falling back into the tank 21 and causing the tank 21 to be contaminated by oil and water again.
[0037] According to some embodiments of this utility model, refer to Figure 1 The oil-absorbing component 6 includes a support belt and an oil-absorbing sponge. The support belt is ring-shaped and sleeved on the outside of the drive shaft 13 and the support frame. The oil-absorbing sponge is fixed to the side of the support belt away from the support frame. By including the support belt and the oil-absorbing sponge in the oil-absorbing component 6, the support belt can provide fixed support for the oil-absorbing sponge, preventing the oil-absorbing sponge from falling off the support frame and causing the oil-absorbing effect to fail. By fixing the oil-absorbing sponge to the side of the support belt away from the support frame, the distance between the oil-absorbing sponge and the pool body 21 can be closer, making it easier for the oil-absorbing sponge to absorb the oil in the pool body 21.
[0038] For example, the support belt is harder than the oil-absorbing sponge, which makes it easier for the support belt to connect with other components so that the oil-absorbing component 6 can rotate. It also makes it easier to squeeze the oil-absorbing sponge to separate the oil from the oil it has absorbed.
[0039] According to some embodiments of this utility model, refer to Figure 1 The support frame includes a support frame body and multiple support rollers 7. The multiple support rollers 7 are located on the support frame body and spaced apart along the extension direction of the oil-absorbing component 6. Each support roller 7 extends in a left-right direction, and both ends of each support roller 7 are rotatably connected to the support frame body via ball joints 8. By including multiple support rollers 7 in the support frame, and by arranging the multiple support rollers 7 on the support frame body at intervals along the extension direction of the oil-absorbing component 6, the oil-absorbing component 6 can be supported by the support rollers 7 in the extension direction, thus more effectively preventing the oil-absorbing component 6 from detaching from the support frame and causing the oil-absorbing effect to fail. By rotatably connecting both ends of each support roller 7 to the support frame body via ball joints 8, the support rollers 7 can rotate freely relative to the support frame body in a direction perpendicular to the extension direction of the support roller 7, reducing friction between the support rollers 7 and the oil-absorbing component 6, and making it easier for the oil-absorbing component 6 to move on the support frame.
[0040] According to some embodiments of this utility model, refer to Figure 1 The outer peripheral wall of the drive shaft 13 is provided with a mating protrusion 12, and the oil suction component 6 is provided with a mating groove, in which the mating protrusion 12 is accommodated. By providing a mating protrusion 12 on the outer peripheral wall of the drive shaft 13 and a mating groove on the oil suction component 6, the mating protrusion 12 is accommodated in the mating groove. When the adsorption device 5 is in operation, the mating protrusion 12 is accommodated in the mating groove, which allows the drive shaft 13 to rotate, thereby driving the oil suction component 6 to rotate. This allows the oil suction component 6 to repeatedly suck up the oil in the pool 21, which is then squeezed and separated from the oil by the roller shaft 4.
[0041] According to some embodiments of this utility model, refer to Figure 1The post-treatment assembly also includes a dosing device 14, which is located outside the tank body 21 and includes a dosing device 14 body, a delivery pipe 15, and a nozzle 16. The liquid outlet of the dosing device 14 body is connected to the nozzle 16 via the delivery pipe 15, and the nozzle 16 is used to spray liquid into the post-treatment zone. By including the dosing device 14 in the post-treatment assembly, the dosing device 14 can pre-treat the subsequent water treatment process.
[0042] According to some embodiments of this utility model, refer to Figure 1 The dosing device 14 and the oil-water separator 18 are located on opposite sides of the tank body 21 in the width direction. By arranging the dosing device 14 and the oil-water separator 18 on opposite sides of the tank body 21 in the width direction, space can be saved and the overall structure of the low-oil-content wastewater treatment device can be made more compact.
[0043] According to some embodiments of this utility model, refer to Figure 1 The drive mechanism 9 and the dosing device 14 are located on the same side of the tank body 21 in the width direction, and on both sides of the adsorption device 5. By placing the drive mechanism 9 and the dosing device 14 on the same side of the tank body 21 in the width direction, and on both sides of the adsorption device 5, space can be saved, making the overall structure of the low oil content wastewater treatment device more compact.
[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0045] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.
[0046] In the description of this utility model, "multiple" means two or more.
[0047] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.
[0048] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.
[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A low-oil-content sewage treatment device, characterized by comprising: The application relates to a device for treating oily sewage, which comprises a pool body, a destabilization assembly, an adsorption assembly and a post-treatment assembly. The pool body comprises a water inlet and a water outlet, and a destabilization zone, an adsorption zone and a post-treatment zone arranged in sequence in the direction from the water inlet to the water outlet. The destabilization assembly comprises carbon rods and a direct-current converter connected by wires, and the carbon rods are located in the destabilization zone and are adapted to be immersed in the oily sewage in the destabilization zone. The adsorption assembly comprises an adsorption device, a rolling shaft and an oil-water tray, the adsorption device comprises a driving mechanism and a transmission mechanism, the driving mechanism is connected with the transmission mechanism to drive the transmission mechanism to move, the adsorption device is arranged on the transmission mechanism and is adapted to contact with the surface of the oily sewage in the adsorption zone to adsorb the oil on the surface of the oily sewage, the rolling shaft is used for extruding the adsorption device to separate the oil adsorbed by the adsorption device, and the oil-water tray is located below the rolling shaft to receive the separated oil. The post-treatment assembly comprises an oil-water separation device arranged outside the pool body, the oil-water separation device has a liquid inlet, a first liquid outlet and a second liquid outlet, the liquid inlet and the oil-water tray are connected by an oil-water mixing pipe, the first liquid outlet is used for discharging the separated oil, the second liquid outlet is used for discharging the separated water, the second liquid outlet and the pool body are connected by a backwater pipe, and the backwater pipe is used for conveying the water in the oil-water separation device to the post-treatment zone.
2. The low oil content wastewater treatment device of claim 1, wherein, The carbon rods are arranged at intervals, and each carbon rod is arranged along the up-down direction.
3. The low oil content wastewater treatment device of claim 1, wherein, The destabilization assembly further comprises a lifting plate located in the destabilization zone and on the downstream side of the carbon rods, and the lifting plate extends upwardly and inclines from the upstream side to the downstream side.
4. The low oil content wastewater treatment device of claim 1, wherein, The pool body extends along the left-right direction, the water inlet is located at the left end of the pool body, and the water outlet is located at the right end of the pool body.
5. The low oil content wastewater treatment device of claim 1, wherein, The transmission mechanism comprises a transmission shaft and a support frame, the support frame is arranged across the pool body, the transmission shaft is rotatably arranged at one end of the support frame, the adsorption device is formed in an annular belt shape and is sleeved outside the transmission shaft and the support frame, the driving mechanism is connected with the transmission shaft to drive the transmission shaft to rotate, thereby driving the adsorption device to move, the adsorption zone is located directly below the support frame, and the rolling shaft is arranged directly above the other end of the support frame.
6. The low oil content wastewater treatment device of claim 5, wherein, The adsorption device comprises a support belt and an oil-absorbing sponge, the support belt is annular and is sleeved outside the transmission shaft and the support frame, and the oil-absorbing sponge is fixed on the side of the support belt away from the support frame.
7. The low oil content wastewater treatment device of claim 5, wherein, The support frame comprises a support frame body and a plurality of support rollers, the support rollers are arranged at intervals along the extension direction of the adsorption device, each support roller extends along the left-right direction, and the left and right ends of each support roller are rotatably connected with the support frame body through spherical joints.
8. The low oil content wastewater treatment device of claim 5, wherein, The outer peripheral wall of the transmission shaft is provided with a matching protrusion, and the oil absorption component is provided with a matching groove, and the matching protrusion is accommodated in the matching groove.
9. The low oil content wastewater treatment device of claim 1, wherein, The post-treatment assembly further comprises a dosing device, which is arranged outside the pool body and comprises a dosing device body, a medicine conveying pipe and a spray head, the medicine outlet of the dosing device body is connected with the spray head through the medicine conveying pipe, and the spray head is used for spraying medicine liquid to the post-treatment area.
10. The low oil content wastewater treatment device of claim 9, wherein, The dosing device body and the oil-water separation device are arranged on opposite sides in the width direction of the pool body; and / or the driving mechanism and the dosing device are located on the same side in the width direction of the pool body, and the driving mechanism and the dosing device are located on both sides of the adsorption device.