A lubricating oil production wastewater floating oil recovery treatment device

Abstract

This invention relates to the field of wastewater treatment technology and discloses a device for recovering and treating floating oil in lubricating oil production wastewater, including a frame and a recovery section. The recovery section includes a housing fixedly connected to the top of the frame, and a main roller is rotatably connected inside the housing. An auxiliary roller is mounted on the frame via a tensioning mechanism located inside the housing. An oil skimming strip is mounted on the outer side of the main roller and the auxiliary roller. This device effectively solves the problem in the prior art where fluid disturbances in oily wastewater systems can still act on the oil skimming strip, causing it to sway slightly during operation. When the sway amplitude exceeds the preset clearance between the oil skimming strip and the skimming plate, it leads to incomplete scraping of the floating oil adsorbed on the surface of the oil skimming strip by the skimming plate, resulting in residual floating oil on the surface of the skimming strip, which then re-enters the oily wastewater system with the circulation of the skimming strip.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a device for recovering and treating floating oil in lubricating oil production wastewater. Background Technology

[0002] In the production process of lubricating oil, in order to remove inorganic salt impurities from the raw crude oil, a water washing process is often used. This involves adding softened water to the crude oil and mixing it thoroughly. Most of the oil phase and water phase are separated in separation equipment such as an electric field. However, during the mixing and separation process, some oil is still not completely separated and is discharged with the washing water, forming wastewater containing floating oil.

[0003] In the existing technology, common oily wastewater treatment equipment includes inclined plate separators, gravity oil separators, air flotation devices, and belt skimmers. Among them, belt skimmers are used in oil recovery due to their continuous operation and strong adaptability. They usually use oleophilic skimming belts to adsorb surface oil, and after rotation and lifting, the skimming plates scrape the oil in the wastewater into the oil collection mechanism.

[0004] However, skimming belts are usually made of flexible materials (such as oleophilic polymer belts, stainless steel mesh belts, etc.), while skimming plates are mostly rigid structures, fixed to the frame by bolts or other means. Their position and angle are determined after installation. The oil adsorption range of the skimming belt is limited to its surrounding area. For oil far from the skimming belt, an air flotation drive method is usually used to push the distant oil to the skimming belt's working area by introducing gas into the oily wastewater system. Even if the skimming belt is deployed in a still water area, the fluid disturbance in the oily wastewater system may still act on the skimming belt, causing it to sway slightly during operation. When the amplitude of this sway exceeds the preset fit gap between the skimming belt and the skimming plate, it will cause the skimming plate to not completely scrape off the oil adsorbed on the surface of the skimming belt, resulting in oil residue on the surface of the skimming belt. The residual oil re-enters the oily wastewater system with the circulation of the skimming belt. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a lubricating oil production wastewater floating oil recovery and treatment device. This device effectively solves the problem in existing technologies where fluid disturbances in the oily wastewater system can still affect the skimming belt, causing it to sway slightly during operation. When this swaying amplitude exceeds the preset clearance between the skimming belt and the skimming plate, it leads to incomplete scraping of the floating oil adsorbed on the surface of the skimming belt by the skimming plate, resulting in residual floating oil on the surface of the skimming belt. This residual floating oil then re-enters the oily wastewater system with the circulation of the skimming belt.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a device for recovering and treating floating oil in lubricating oil production wastewater, comprising:

[0008] A frame, wherein a treatment tank for holding wastewater is provided inside the frame;

[0009] The recycling unit includes a housing fixedly connected to the top of the frame, and a main roller is rotatably connected inside the housing. The frame is equipped with a secondary roller through a tensioning mechanism provided inside it. The outer sides of the main roller and the secondary roller are equipped with skimming strips.

[0010] An oil collecting mechanism for collecting floating oil is fixedly connected inside the housing. A scraper is fixedly connected inside the housing. A guide hole is provided on the outside of the housing, and an oil removal component for scraping off the floating oil on the surface of the skimmed oil is installed in the guide hole. A switching component for adjusting the position of the oil removal component is provided on the outside of the housing.

[0011] The top of the housing is equipped with a rotary component for driving the main roller to rotate along its central axis.

[0012] Furthermore, the rotating component includes a driven wheel fixedly connected to the end of the main roller, a drive motor fixedly connected to the top of the housing, and a drive wheel fixedly connected to the output end of the drive motor. The drive wheel is connected to the driven wheel via a belt located on the outer side.

[0013] Furthermore, the outer side of the housing is provided with a guide groove through the guide hole, and there are two guide grooves that are symmetrically distributed on the left and right sides along the center plane of the housing.

[0014] Furthermore, the degreasing component includes a slider slidably connected in the guide hole. The slider is provided in two sets and is symmetrically distributed on the left and right sides along the center plane of the housing. Each set of sliders has two sliders and is symmetrically distributed on the front and back sides along the center plane of the same set of guide holes. The slider is arc-shaped on the side near the guide groove. The slider is connected to the inner wall of the guide hole by a return spring provided on its outer side.

[0015] Two sliders near the oil collecting mechanism are fixedly connected to an oil collecting plate, and two sliders away from the oil collecting mechanism are fixedly connected to an auxiliary plate. Both the auxiliary plate and the oil collecting plate are inclined, and both the top of the auxiliary plate and the oil collecting plate are provided with elastic scrapers.

[0016] Furthermore, the top of the oil collecting plate is fixedly connected to an ear plate, and there are two ear plates that are symmetrically distributed on the left and right sides along the center plane of the oil collecting plate. The ear plates are rotatably connected to pins through mounting holes provided inside. The two pins are fixedly connected to skimming plates, and torsion springs are assembled on the outer circumference of the pins.

[0017] Furthermore, the ear plate has a movable hole with an arc-shaped design, and a guide rod that fits against the inner wall of the movable hole is fixedly connected to the outer side of the skimming plate.

[0018] Furthermore, the switching component includes a movable plate slidably connected in the guide groove, and the movable plate is connected to the inner wall of the guide groove by a compression spring disposed on its outer side. The top of the movable plate is arc-shaped, and the bottom of the movable plate is provided with an abutment section.

[0019] The abutting section includes an integrally formed outward expansion section and an inward contraction section, wherein the inward contraction section is designed with a slope.

[0020] Furthermore, a magnetic component is fixedly connected to the outer side of the housing, and the magnetic component is magnetically connected to the movable plate.

[0021] Furthermore, the end of the main roller is fixedly connected to a cam that fits against the arc surface of the movable plate.

[0022] The technical solution provided by this invention has the following advantages compared with the prior art:

[0023] This invention features an oil collecting plate and an auxiliary plate. A switching mechanism dynamically adjusts the position of the oil removal component: the main roller drives the cam to rotate, squeezing the movable plate downwards along the guide groove. Under the action of the return spring, the slider causes the oil collecting plate and the auxiliary plate to move towards each other, ultimately adhering to the skimming strip via an elastic scraper. Simultaneously, the skimming plate and the auxiliary plate form a closed enclosing space. Regardless of whether the skimming strip moves, its floating oil adsorption area can effectively contact the elastic scraper, thoroughly scraping away surface oil and preventing residual oil from circulating back into the wastewater system with the skimming strip. After the floating oil is recovered, the magnetic component gradually demagnetizes, the compression spring drives the movable plate to reset, and the slider causes the oil collecting plate and auxiliary plate to return to their initial positions. During this process, the skimming plate contacts the scraper, and the scraper's force overcomes the torsion spring resistance, causing the skimming plate to rotate around the pin. The bottom edge of the scraper scrapes away the sludge adhering to the surface of the skimming plate and the elastic scraper, causing the sludge to fall to the oil collecting mechanism, preventing the sludge layer from damaging the adhesion accuracy. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0026] Figure 2This is a cross-sectional view of the casing according to an embodiment of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the housing, scraper, and oil collection mechanism according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the three-dimensional separation structure of the housing and the degreasing component according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the three-dimensional separation structure of the oil skimming plate and the oil collecting plate according to an embodiment of the present invention;

[0030] Figure 6 This is an embodiment of the present invention. Figure 5 A magnified structural diagram of part A in the middle;

[0031] Figure 7 This is a schematic diagram of the three-dimensional separation structure of the switching component according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the planar state transformation structure of the skimming plate according to an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the planar state transformation structure of the cam according to an embodiment of the present invention.

[0034] The labels in the diagram represent: 1. Frame; 2. Processing box; 3. Recovery section; 31. Housing; 311. Guide hole; 312. Guide groove; 32. Main roller; 33. Auxiliary roller; 34. Skimming strip; 35. Oil collection mechanism; 36. Scraper; 37. Oil removal component; 371. Slider; 372. Oil collection plate; 3721. Ear plate; 3722. Mounting hole; 3723. Movable hole; 373. Auxiliary... 374. Auxiliary plate; 375. Pin shaft; 376. Skimming plate; 3775. Guide rod; 3776. Torsion spring; 38. Switching component; 381. Movable plate; 382. Compression spring; 383. Abutting section; 3831. Outward expansion section; 3832. Inward contraction section; 384. Magnetic component; 385. Cam; 39. Rotating component; 391. Driven wheel; 392. Drive motor; 393. Drive wheel; 394. Belt. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] The present invention will be further described below with reference to embodiments.

[0037] Example:

[0038] Please see Figures 1-9 This invention provides a technical solution: a device for recovering and treating floating oil in lubricating oil production wastewater, comprising:

[0039] Frame 1, with a treatment tank 2 for holding wastewater inside the frame 1;

[0040] The recycling unit 3 includes a housing 31 fixedly connected to the top of the frame 1, and a main roller 32 is rotatably connected inside the housing 31. The frame 1 is equipped with a secondary roller 33 through a tensioning mechanism provided inside it. An oil skimming belt 34 is fitted on the outside of the main roller 32 and the secondary roller 33.

[0041] An oil collecting mechanism 35 for collecting floating oil is fixedly connected inside the housing 31. A scraper 36 is fixedly connected inside the housing 31. A guide hole 311 is opened on the outside of the housing 31, and an oil removal component 37 for scraping off floating oil from the surface of the skimming strip 34 is installed in the guide hole 311. A switching component 38 for adjusting the position of the oil removal component 37 is provided on the outside of the housing 31.

[0042] The top of the housing 31 is equipped with a rotating component 39 for driving the main roller 32 to rotate along its central axis.

[0043] The rotating component 39 includes a driven wheel 391 fixedly connected to the end of the main roller 32. A drive motor 392 is fixedly connected to the top of the housing 31, and a drive wheel 393 is fixedly connected to the output end of the drive motor 392. The drive wheel 393 is connected to the driven wheel 391 through a belt 394 on the outer side.

[0044] The outer side of the housing 31 is provided with a guide groove 312 that passes through the guide hole 311, and there are two guide grooves 312 that are symmetrically distributed on the left and right sides along the center plane of the housing 31.

[0045] The degreasing component 37 includes a slider 371 slidably connected in the guide hole 311. The slider 371 is provided in two sets and is symmetrically distributed on the left and right sides along the center plane of the housing 31. Each set of sliders 371 has two sliders and is symmetrically distributed on the front and back sides along the center plane of the same set of guide holes 311. The slider 371 is arc-shaped on the side near the guide groove 312. The slider 371 is connected to the inner wall of the guide hole 311 by a return spring provided on its outer side.

[0046] Two sliders 371 near the oil collecting mechanism 35 are fixedly connected to an oil collecting plate 372, and two sliders 371 away from the oil collecting mechanism 35 are fixedly connected to an auxiliary plate 373. Both the auxiliary plate 373 and the oil collecting plate 372 are inclined, and both the top of the auxiliary plate 373 and the oil collecting plate 372 are provided with elastic scrapers.

[0047] The top of the oil collecting plate 372 is fixedly connected to the ear plate 3721, and there are two ear plates 3721, which are symmetrically distributed on the left and right sides along the center plane of the oil collecting plate 372. The ear plates 3721 are rotatably connected to the pins 374 through the mounting holes 3722 provided inside. The two pins 374 are fixedly connected to the oil skimmers 375, and the outer circumferential surface of the pins 374 is fitted with torsion springs 376.

[0048] The ear plate 3721 has a movable hole 3723, which is arc-shaped. The outer side of the skimming plate 375 is fixedly connected to a guide rod 3751 that fits against the inner wall of the movable hole 3723.

[0049] The switching component 38 includes a movable plate 381 that is slidably connected in the guide groove 312, and the movable plate 381 is connected to the inner wall of the guide groove 312 by a compression spring 382 disposed on its outer side. The top of the movable plate 381 is designed with an arc surface, and the bottom of the movable plate 381 is provided with an abutment section 383.

[0050] The abutment section 383 includes an integrally formed outward expansion section 3831 and an inward contraction section 3832, with the inward contraction section 3832 having a sloping design.

[0051] A magnetic component 384 is fixedly connected to the outer side of the housing 31, and the magnetic component 384 is magnetically connected to the movable plate 381.

[0052] The end of the main roller 32 is fixedly connected to a cam 385 that fits against the arc surface of the movable plate 381.

[0053] Working principle and advantages of this lubricating oil production wastewater floating oil recovery and treatment equipment:

[0054] During the operation of the oil spill recovery system, the skimming belt 34 is usually made of flexible substrate, such as oleophilic polymer material belt or stainless steel mesh belt. Its outer side is the oil adsorption surface. The skimming plate 375 only performs oil skimming operations on this surface. The traditional skimming plate 375 adopts a rigid structure design and is fixedly assembled inside the equipment housing 31 by rigid connection methods such as bolt fastening. The skimming belt 34 is generally used in conjunction with a tensioning mechanism. The core function of the tensioning mechanism is to maintain the stable tension of the skimming belt 34 (steel belt, nylon belt or polyurethane belt, etc.) to prevent it from slipping, deviating or breaking during operation. Its working principle is based on the "tension compensation" mechanism, that is, through the elastic deformation of the mechanical structure, gravity, or active power output, the tension attenuation or instantaneous peak value of the skimming belt 34 caused by wear, temperature change, and load fluctuation is offset in real time, ensuring the effective friction between the skimming belt 34 and the main roller 32 and auxiliary roller 33, and ensuring continuous oil skimming operation.

[0055] On the other hand, the oil adsorption range of the skimming belt 34 is limited to its surrounding area. For oil far from the skimming belt 34, a flotation method is usually used to push the distant oil to the working area of ​​the skimming belt 34 by introducing gas into the oily wastewater system. Even if the skimming belt 34 is deployed in a still water area, the fluid disturbance in the oily wastewater system may still act on the skimming belt 34, causing the skimming belt 34 to sway slightly during operation. When the amplitude of this sway exceeds the preset fit gap between the skimming belt 34 and the skimming plate 375, it will cause the skimming plate 375 to not completely scrape off the oil adsorbed on the surface of the skimming belt 34, resulting in oil residue on the surface of the skimming belt 34. The residual oil re-enters the oily wastewater system with the circulation of the skimming belt 34, resulting in a significant decrease in the oil recovery efficiency.

[0056] During the implementation of this invention, the operator starts the drive motor 392 (which can be any type such as a stepper motor, servo motor, or motor) inside the rotating component 39, causing the drive wheel 393 mounted at the output end of the drive motor 392 to rotate at a preset speed. Since the drive wheel 393 and the driven wheel 391 are connected by a belt 394, the driven wheel 391 can drive the main roller 32 connected to it to rotate at a preset speed. Under the synergistic effect of the auxiliary roller 33, the skimming belt 34 achieves continuous traction movement.

[0057] Before the skimming strip 34 begins to move, the section of the skimming strip 34 initially located in the treatment tank 2 comes into contact with the wastewater containing floating oil. Utilizing the viscous properties of the floating oil, as the skimming strip 34 moves, the floating oil is adsorbed onto the surface of the skimming strip 34 and moves upward synchronously with it until it reaches the working area of ​​the skimming plate 375.

[0058] During the process of the skimming strip 34 section, which absorbs floating oil, moving from the treatment box 2 to the working area of ​​the skimming plate 375, the cam 385, connected to the main roller 32, rotates synchronously with the main roller 32. Before the cam 385 contacts the top arc surface of the movable plate 381, the movable plate 381 is in its initial position under the synergistic action of the compression spring 382, ​​that is, the arc surfaces of the two sliders 371 on the same side are in contact with the outer expansion section 3831 of the abutment section 383. At this time, the distance between the two sliders 371 on the same side is the largest, which makes the distance between the oil collecting plate 372 and the auxiliary plate 373 the largest (the initial distance between the skimming plate 375 and the auxiliary plate 373 is greater than the thickness of the skimming strip 34, and the width of the auxiliary plate 373 and the skimming plate 375 is greater than the width of the skimming strip 34).

[0059] When cam 385 contacts the arc surface at the top of movable plate 381, cam 385 exerts a squeezing force on movable plate 381. As the contact depth between cam 385 and movable plate 381 increases, this squeezing force overcomes the elastic resistance of compression spring 382, ​​driving movable plate 381 to move downwards along guide groove 312, while compression spring 382 is compressed. During the downward movement of movable plate 381, the outer arc surface of slider 371 gradually transitions from the expanding section 3831 of abutment section 383 to the contracting section 3832, which adopts a sloping structure design. During the downward movement of movable plate 381, slider 371 gradually moves closer together under the synergistic action of return spring, thereby driving oil collecting plate 372 and auxiliary plate 373 to move synchronously towards skimming strip 34.

[0060] It is worth noting that when the arc surface of slider 371 contacts the outward expansion section 3831 inside the movable plate 381, the return spring is compressed. When the arc surface of slider 371 gradually moves from the outward expansion section 3831 to the inward contraction section 3832 and moves along the inward contraction section 3832, the thickness of the inclined surface of the inward contraction section 3832 decreases from bottom to top, which causes the pressure of the movable plate 381 on slider 371 to gradually decrease. As a result, the return spring will drive the two sliders 371 on the same side to move the auxiliary plate 373 and the oil collection plate 372 towards each other along the guide hole 311.

[0061] When the cam 385 is about to disengage from the movable plate 381, the movable plate 381 moves to the working area of ​​the magnetic component 384. The magnetic component 384 on the outside of the housing 31 is activated, and the movable plate 381 is attracted and positioned by magnetic force, so that the skimming plate 375 and the auxiliary plate 373 are respectively attached to the outer (adsorption surface) and inner side of the skimming strip 34 (both the attached ends of the skimming plate 375 and the auxiliary plate 373 are equipped with elastic scrapers, which can be made of flexible and wear-resistant materials such as oil-resistant rubber and polyurethane. The elastic scrapers have a reserved compression amount, which ensures that the surface of the skimming plate 375 and the skimming strip 34 are tightly attached, which can thoroughly scrape off the floating oil, and will not generate too much frictional resistance, making it difficult for the skimming strip 34 to move). The skimming plate 375 and the auxiliary plate 373 form a closed enclosing space to limit the movement of the skimming strip 34.

[0062] After the oil skimming plate 375 (outer side) and the auxiliary plate 373 (inner side) are activated, they sandwich the section of the oil skimming strip 34 that needs to be skimmed, forming a narrow, enveloping physical space. This physical space itself exerts a strong mechanical constraint on the lateral swaying (left-right swinging) and possible wrinkling tendency of the oil skimming strip 34. The movement of the oil skimming strip 34 within this section is restricted to passing through basically flat and stable, greatly reducing the impact of external fluid disturbances transmitted to the skimming contact point. Even if the oil skimming strip 34 still has slight swaying, due to the existence of the "dynamic adhesion" mechanism, and because this space ensures that the oil skimming strip 34 will not deviate significantly from the predetermined path, the oil adsorption area on the oil skimming strip 34 is always within the effective contact range with the elastic scraper. Therefore, when the oil skimming strip 34 sways, the dynamic adhesion mechanism ensures that the skimming element (elastic scraper) can "follow" and stick tightly to the strip surface.

[0063] It is worth noting that the magnetic component 384 is an electromagnet, which is convenient for operators to control. Furthermore, the downward movement of the movable plate 381 is an adjustment process where the oil collecting plate 372 and the auxiliary plate 373 move from "away from the skimming band 34" to "closer to the skimming band 34". The cam 385 drives the movable plate 381 downward along the guide groove 312, causing the slider 371 to transition from the outward expansion section 3831 of the contact section 383 to the inward contraction section 3832, ultimately achieving the synchronous approach of the oil collecting plate 372 and the auxiliary plate 373 to the skimming band 34. If the magnetic component 384 initially attracts, from... Since the adsorption process of the magnetic component 384 is instantaneous, if the magnetic component 384 is used to quickly adsorb the movable plate 381, it may cause the slider 371 mechanism to move instantaneously, causing the skimming band 34 to shake violently or wrinkle, which will aggravate the problem of residual oil. At the same time, after the movable plate 381 is adsorbed and fixed by the magnetic component 384, a gap is left between the top of the movable plate 381 and the cam 385 to ensure that when the cam 385 rotates with the main roller 32, there is no motion interference between the cam 385 and the movable plate 381, so that the skimming band 34 can move normally.

[0064] As the skimming belt 34 circulates, the skimming plate 375, together with the elastic scraper, continuously scrapes away the floating oil adhering to the surface of the skimming belt 34 (the skimming plate 375, the oil collecting plate 372, and the scraper 36 are all made of oleophobic material, which can significantly reduce the tendency of oil sludge to adhere and reduce the risk of oil sludge residue). The oil collecting plate 372 adopts an inclined structure design, and the skimming plate 375 connected to the oil collecting plate 372 is arranged at the same inclination angle. The scraped floating oil slides down the inclined surface of the oil collecting plate 372 under its own gravity and falls into the oil collecting mechanism 35, realizing the centralized collection of floating oil. The oil collecting mechanism 35 transports the collected floating oil to the subsequent process to complete the subsequent deep treatment.

[0065] The aforementioned auxiliary plate 373, in conjunction with the skimming plate 375, enables more thorough removal of floating oil, significantly reducing the residue rate. Traditional rigid skimming plates 375 and flexible skimming belts 34 have gaps in their fit, and blind spots can easily appear when the skimming belt 34 oscillates. This equipment dynamically adjusts the position of the oil removal component 37 through a switching element 38: the main roller 32 drives the cam 385 to rotate, squeezing the movable plate 381 downwards along the guide groove 312. This causes the slider 371, under the action of the return spring, to bring the oil collecting plate 372 and the auxiliary plate 373 closer together, ultimately achieving a tight fit with the skimming belt 34 via the elastic scraper. Simultaneously, the skimming plate 375 and the auxiliary plate 373 form a closed enveloping space, ensuring that the floating oil adsorption area of ​​the skimming belt 34 effectively contacts the elastic scraper regardless of whether it oscillates, thoroughly removing surface floating oil and preventing residual floating oil from circulating back into the wastewater system with the skimming belt 34.

[0066] During long-term operation, the skimming plate 375 (including the elastic scraper it is assembled with) maintains a preset contact with the skimming band 34 and continuously performs the skimming operation under the synergistic effect of the auxiliary plate 373 and the oil collecting plate 372. This continuous skimming characteristic causes the accumulation rate of oil sludge on the surface of the elastic scraper to accelerate due to continuous contact with floating oil, which can easily lead to the formation of an oil sludge layer on the surface of the elastic scraper, destroying the contact accuracy between the elastic scraper and the skimming band 34, and thus causing the problem of floating oil residue.

[0067] The formation of oil sludge originates from the combined effect of floating oil components and impurities: In addition to the target floating oil, oily wastewater usually contains fine suspended particles. At the same time, the floating oil may contain heavy components such as waxes and colloids. These substances are adsorbed by the skimming band 34 along with the floating oil. During the skimming process of the skimming plate 375, they mix with the residual floating oil that has not been completely removed, gradually forming oil sludge. Furthermore, because the elastic scraper is made of flexible and wear-resistant materials such as oil-resistant rubber and polyurethane, these materials have a low surface band gap and strong compatibility with heavy components in the floating oil. Therefore, compared with the oil skimming plate 375 and scraper 36 made of oleophobic materials, oil sludge is more likely to adhere to the elastic scraper.

[0068] In this invention, after the oil recovery operation in the treatment tank 2 is completed, the operator shuts off the rotating component 39, and the skimming belt 34 stops running synchronously with the transmission system. At this time, the magnetic component 384 stops working (the magnetic component 384 stops not immediately, but gradually reduces the magnetic force between it and the movable plate 381 to avoid the movable plate 381 rapidly resetting under the cooperation of the compression spring 382 at the moment the magnetic component 384 stops, which could easily cause a "collision" between the skimming plate 375 and the scraper 36 later, resulting in damage to the skimming plate 375 or the scraper 36). After the movable plate 381 loses its magnetic constraint, the compression spring 382 connected to it releases its elastic potential energy, driving the movable plate 381 to reset as a whole along the guide groove 312. During this reset process, the outer arc surface of the slider 371 gradually slides from the inner section 3832 of the contact section 383 to the outer section 3831, thereby driving the auxiliary plate 373 and the oil collecting plate 372 to reset synchronously along the guide hole 311 until the oil collecting plate 372 and the auxiliary plate 373 return to their initial positions.

[0069] The oil skimmer 375 is hinged to the ear plate 3721 of the oil collecting plate 372 via an internal pin 374. At the same time, the guide rod 3751 installed on the oil skimmer 375 is in the movable hole 3723 of the ear plate 3721, so that the oil skimmer 375 can rotate around the central axis of the pin 374. A torsion spring 376 is mounted on the outside of the pin 374. In the initial state, the torsion spring 376 constrains the oil skimmer 375 to a parallel position with the oil collecting plate 372 by a preset torque. At this time, the guide rod 3751 is in the initial position of the movable hole 3723.

[0070] During the resetting process of the oil collecting plate 372 driving the skimming plate 375, the skimming plate 375 gradually comes into contact with the scraper 36. The force applied by the scraper 36 to the skimming plate 375 overcomes the elastic resistance threshold of the torsion spring 376, driving the skimming plate 375 to rotate around the central axis of the pin 374 until the bottom end face of the skimming plate 375 is parallel to that of the scraper 36. As the oil collecting plate 372 continues to reset and move, the sludge attached to the outside of the skimming plate 375 and the elastic scraper is scraped off by the bottom edge of the scraper 36. When the oil collecting plate 372 resets to its initial position, the skimming plate 375 moves completely into the bottom coverage area of ​​the scraper 36 (the width of the scraper 36 is greater than the sum of the widths of the skimming plate 375 and the elastic scraper). The sludge originally accumulated on the surface of the skimming plate 375 falls into the oil collecting mechanism 35 and enters the subsequent processing process together with the previously recovered floating oil.

[0071] It is worth noting that there is a preset gap between the scraper 36 and the oil collecting plate 372, that is, the oil collecting plate 372 does not come into contact with the scraper 36 during the movement, so as to avoid interference between the oil collecting plate 372 and the scraper 36 during the movement, which would affect the normal displacement of the oil collecting plate 372. At the same time, it can also prevent the floating oil on the oil collecting plate 372 from being blocked by the scraper 36, which would affect the smoothness of the floating oil entering the oil collecting mechanism 35.

[0072] The skimming plate 375 is hinged to the ear plate 3721 of the oil collecting plate 372 via a pin 374. The pin 374 is fitted with a torsion spring 376. In the initial state, the skimming plate 375 is parallel to the oil collecting plate 372. After the floating oil is recovered, the magnetic component 384 gradually demagnetizes, the compression spring 382 drives the movable plate 381 to reset, and the slider 371 drives the oil collecting plate 372 and the auxiliary plate 373 back to the initial position. During this process, the skimming plate 375 comes into contact with the scraper 36. The force of the scraper 36 overcomes the resistance of the torsion spring 376, causing the skimming plate 375 to rotate around the pin 374. The bottom edge of the scraper 36 scrapes away the sludge (formed by the mixture of heavy components and suspended particles in the floating oil) adhering to the surface of the skimming plate 375 and the elastic scraper. The sludge falls off to the oil collecting mechanism 35, avoiding damage to the adhesion accuracy of the sludge layer and ensuring the long-term stable operation of the equipment.

[0073] It is worth noting that the skimming plate 375 is the core component for removing floating oil. Its elastic scraper is made of flexible and wear-resistant materials such as oil-resistant rubber and polyurethane. Although these materials are suitable for the close fit required when skimming oil, they lack rigid support when idle and are prone to permanent deformation due to collisions and compression (such as bending of the elastic scraper and warping of the skimming plate 375). On the other hand, the scraper 36 is a rigid structure made of oleophobic material. When idle, it covers the skimming plate 375 to form a "protective barrier". If the skimming plate 375 and the elastic scraper are exposed, dust and fine solid particles (such as dust in the production environment and suspended particles from wastewater residue) may adhere to their surface. In particular, the flexible surface of the elastic scraper is prone to forming gaps. The "protective barrier" formed by the scraper 36 can directly block impurities from contacting the skimming plate 375 and the elastic scraper, preventing impurities from accumulating and forming a "pre-oil sludge layer".

[0074] 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 the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for recovering and treating floating oil in lubricating oil production wastewater, characterized in that, include: A frame (1) is provided with a treatment tank (2) for holding wastewater. The recycling unit (3) includes a housing (31) fixedly connected to the top of the frame (1), and a main roller (32) is rotatably connected inside the housing (31). The frame (1) is equipped with a secondary roller (33) through a tensioning mechanism provided inside it. The outer sides of the main roller (32) and the secondary roller (33) are equipped with skimming strips (34). An oil collecting mechanism (35) for collecting floating oil is fixedly connected inside the housing (31). A scraper (36) is fixedly connected inside the housing (31). A guide hole (311) is provided on the outside of the housing (31), and an oil removal component (37) for scraping off floating oil from the surface of the skimming strip (34) is installed inside the guide hole (311). A switching component (38) for adjusting the position of the oil removal component (37) is provided on the outside of the housing (31). The top of the housing (31) is equipped with a rotary component (39) for driving the main roller (32) to rotate along its central axis.

2. The equipment for recovering and treating floating oil in lubricating oil production wastewater according to claim 1, characterized in that: The rotating component (39) includes a driven wheel (391) fixedly connected to the end of the main roller (32), a drive motor (392) fixedly connected to the top of the housing (31), and a drive wheel (393) fixedly connected to the output end of the drive motor (392). The drive wheel (393) is connected to the driven wheel (391) via a belt (394) on the outer side.

3. The equipment for recovering and treating floating oil in lubricating oil production wastewater according to claim 1, characterized in that: The outer side of the housing (31) is provided with a guide groove (312) through the guide hole (311), and there are two guide grooves (312) that are symmetrically distributed on the left and right sides along the center plane of the housing (31).

4. The lubricating oil production wastewater floating oil recovery and treatment equipment according to claim 3, characterized in that: The degreasing component (37) includes a slider (371) slidably connected in the guide hole (311). The slider (371) is provided in two sets and is symmetrically distributed on the left and right sides along the center plane of the housing (31). Each set of sliders (371) is provided in two sets and is symmetrically distributed on the front and back sides along the center plane of the same set of guide holes (311). The slider (371) is arc-shaped on the side near the guide groove (312). The slider (371) is connected to the inner wall of the guide hole (311) by a return spring provided on its outer side. Two sliders (371) near the oil collecting mechanism (35) are fixedly connected to an oil collecting plate (372), and two sliders (371) away from the oil collecting mechanism (35) are fixedly connected to an auxiliary plate (373). The auxiliary plate (373) and the oil collecting plate (372) are both designed to be inclined. The top of the auxiliary plate (373) and the oil collecting plate (372) are provided with elastic scrapers.

5. The lubricating oil production wastewater floating oil recovery and treatment equipment according to claim 4, characterized in that: The top of the oil collecting plate (372) is fixedly connected to an ear plate (3721), and there are two ear plates (3721) which are symmetrically distributed on the left and right sides along the center plane of the oil collecting plate (372). The ear plates (3721) are rotatably connected to pins (374) through mounting holes (3722) provided inside. The two pins (374) are fixedly connected to oil skimmers (375), and the outer circumferential surface of the pins (374) is fitted with torsion springs (376).

6. The lubricating oil production wastewater floating oil recovery and treatment equipment according to claim 5, characterized in that: The ear plate (3721) has an openable hole (3723) with an arc-shaped design. The outer side of the skimming plate (375) is fixedly connected to a guide rod (3751) that fits against the inner wall of the openable hole (3723).

7. The lubricating oil production wastewater floating oil recovery and treatment equipment according to claim 3, characterized in that: The switching component (38) includes a movable plate (381) that is slidably connected in the guide groove (312), and the movable plate (381) is connected to the inner wall of the guide groove (312) by a compression spring (382) provided on its outer side. The top of the movable plate (381) is arc-shaped, and the bottom of the movable plate (381) is provided with an abutment section (383). The abutting section (383) includes an integrally formed outward expansion section (3831) and an inward contraction section (3832), the inward contraction section (3832) being designed with a slope.

8. The lubricating oil production wastewater floating oil recovery and treatment equipment according to claim 7, characterized in that: A magnetic component (384) is fixedly connected to the outer side of the housing (31), and the magnetic component (384) is connected to the movable plate (381) by magnetic force.

9. The lubricating oil production wastewater floating oil recovery and treatment equipment according to claim 7, characterized in that: The end of the main roller (32) is fixedly connected to a cam (385) that fits against the arc surface of the movable plate (381).

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