Oily water treatment device for oil exploitation site

Abstract

The invention discloses an oily water treatment device for an oil exploitation site, and particularly relates to the technical field of oily water treatment.The oily water treatment device comprises a treatment tank used for treating oily water, a treatment barrel used for containing the oily water is arranged in the treatment tank, and a flocculation barrel used for adding a flocculating agent is arranged on one side of the bottom of the treatment tank; an injection mechanism is arranged at the bottom of the treatment tank, a hydraulic cylinder is arranged at the top of the treatment tank, and the hydraulic cylinder is matched with the injection mechanism to be used for quantitatively injecting a flocculating agent in the flocculation barrel into the treatment barrel. According to the oily water treatment device for the oil exploitation site, the oil scraping mechanism can be matched with a balance weight ball in the oil scraping mechanism to enable an oil storage pipe to be attached to the water surface to scrape oil, the problem that an existing fixed scraping plate cannot scrape oil or clean water is solved, meanwhile, a hydraulic cylinder lifts the internal structure of an oil scraping assembly, oil slick is poured into an oil storage ring and flows to a second collecting barrel, and the oil slick is recycled. Manual dumping is not needed, the floating oil scraping efficiency is effectively improved, and the risk of secondary pollution of the floating oil is reduced.

Description

Technical Field

[0001] This invention relates to the field of oily wastewater treatment technology, and in particular to an oily wastewater treatment device for use in oil extraction sites. Background Technology

[0002] During oil extraction (including conventional self-flowing extraction, heavy oil steam drive, and tertiary oil recovery processes), a large amount of oily wastewater (referred to in the industry as "produced water") is generated, accounting for approximately 2-5 times the total amount of oil extracted. This type of wastewater has a complex composition, with core pollutants including: ① floating oil, emulsified oil, and dissolved oil; ② suspended solids, formation sediment, equipment wear debris, and chemical residues.

[0003] Chinese Patent Publication No. CN213327011U discloses an oily wastewater treatment device for oil extraction sites, comprising a base plate and a fixed plate. The fixed plate is positioned above the base plate and is fixedly connected to the base plate at both ends by support rods. Both the base plate and the fixed plate have through grooves in their middle sections. A housing is fixedly mounted on the upper surface of the fixed plate. From left to right, a feed hopper, a motor, and an oil pump are sequentially arranged at the top of the housing. A rotating rod is rotatably mounted inside the upper part of the housing via rolling bearings. The output end of the motor is fixedly connected to the upper end of the rotating rod. The inlets of the feed hopper and the oil pump extend into the interior of the housing. From top to bottom, a filter plate and an adsorption plate are sequentially arranged inside the housing. Threaded sleeves are fixedly mounted at both ends of the inner sides of the filter plate and the adsorption plate. This patent document facilitates the disassembly and cleaning of the internal filtration mechanism of the device.

[0004] However, the above-mentioned patent documents still have the following defects in practice;

[0005] Although the aforementioned patented equipment can treat oily wastewater, in actual use, the collection of impurities still relies on manual disassembly and cleaning, lacks automation capabilities, and has a high downtime rate. This leads to easy clogging of the impurity collection system and cumbersome cleaning, resulting in reduced efficiency in treating oily wastewater. Summary of the Invention

[0006] The main objective of this invention is to provide an oily wastewater treatment device for oil extraction sites, which can effectively solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] An oily wastewater treatment device for oil extraction sites includes a treatment tank for treating oily wastewater. Inside the treatment tank is a treatment container for holding the oily wastewater. A flocculant addition container is located on one side of the bottom of the treatment tank. An injection mechanism is located at the bottom of the treatment tank, and a hydraulic cylinder is located at the top of the treatment tank. The hydraulic cylinder, in conjunction with the injection mechanism, is used to quantitatively inject the flocculant from the flocculant container into the treatment container, while simultaneously injecting air into the oily wastewater. A collection mechanism for collecting impurities is located on the upper middle side of the treatment tank. An oil scraping mechanism for scraping floating oil from the surface of the oily wastewater is located at the top of the inner cavity of the treatment tank. A second collection container for collecting floating oil is located on one side of the top of the treatment tank, and a first collection container is located on the other side of the outer surface of the treatment tank. The injection mechanism, in conjunction with the collection mechanism, is used to scrape the collected impurities into the first collection container.

[0009] Preferably, the injection mechanism includes a baffle plate disposed at the bottom of the inner cavity of the treatment tank and a cavity ring communicating with the inner cavity of the flocculation tank. The top of the cavity ring is provided with a plurality of injection tubes arranged in a ring array. The bottom of the cavity ring is also provided with an addition component for squeezing flocculant and air into the interior of the treatment tank. The middle of the baffle plate is provided with a transmission component one. The outer side of the transmission component one is also provided with stirring blades for stirring and accelerating the diffusion of the added flocculant and air. The bottom of the treatment tank is also provided with a motor for transmission. The side of the injection tubes away from the cavity ring all penetrates the outer surface of the treatment tank and communicates with the inner cavity of the treatment tank.

[0010] Preferably, the transmission assembly includes a first sealing tube disposed between the processing tank and the partition, a second sealing tube disposed in the middle of the partition, a pressure plate disposed inside the second sealing tube, damping rods disposed on both sides of the bottom of the pressure plate, a splined bushing disposed in the middle of the lower end of the pressure plate, and a piston disc for compressing air disposed at the bottom of the two damping rods.

[0011] Preferably, the added component includes a sealing tube 1 arranged in a ring on the outer surface of the bend, a spring 1 provided in the inner cavity of each of the bends on the side away from the sealing tube 1, a push rod provided on the upper part of each of the spring 1s, an annular plate for maintaining synchronous balance provided on the top of each of the push rods, a sealing rod arranged in a ring on the top of the annular plate, an L-shaped ring for squeezing flocculant slidably installed in the inner cavity of the cavity ring, a squeezing hole arranged in a ring at the bottom of the L-shaped ring, the top of the sealing rod matching the bottom of the inner cavity of the squeezing hole on the same side, a vertical tube provided on the upper part of the horizontal part of the bend, and an air box provided on the top of the vertical tube.

[0012] Preferably, the collection mechanism includes a storage ring disposed on the upper part of the inner wall of the processing tank, a plurality of filter holes are provided on the upper part of the surface of the processing tank, a plurality of scrapers for scraping off impurities are arranged in a ring in the inner cavity of the storage ring, an arc plate is provided on the upper part of the plurality of scrapers, and a second transmission assembly is provided on the top of the inner cavity of the processing tank, and the sides of the plurality of second transmission assemblies that are close to each other are disposed on the surface of the second transmission assembly.

[0013] Preferably, the transmission assembly two includes a sealed barrel disposed at the top of the inner cavity of the processing tank, a bushing two rotatably disposed at the bottom of the inner cavity of the sealed barrel, a splined shaft two slidably disposed within the inner cavity of the bushing two, a transmission shaft disposed at the middle of the splined shaft two, the top of the transmission shaft being rotatably mounted to the output end of the hydraulic cylinder, the bottom of the transmission shaft being connected to the axis of the splined bushing two, an arc-shaped ring plate being disposed on the surface of the bushing two, a snap-fit ​​assembly being disposed at the bottom of the surface of the sealed barrel, and sliding cavities being opened on both sides of the surface of the sealed barrel, with a spring two disposed inside the sliding cavities.

[0014] Preferably, the snap-fit ​​assembly includes a rotating ring rotatably disposed at the bottom of the sealing barrel, a turntable is also snapped onto the inner surface of the rotating ring, and a plurality of spring sleeves are also arranged in a ring on the top of the turntable.

[0015] Preferably, the oil scraping mechanism includes an oil storage ring disposed on the top surface of the inner cavity of the processing tank, and a number of fan-shaped plates are also arranged in a ring on the top of the oil storage ring. Oil scraping components for scraping off floating oil are disposed around the scraper plates, and a rotating component is sleeved on the surface of the sealed barrel.

[0016] Preferably, the rotating assembly includes a C-shaped plate disposed on the surface of the hydraulic cylinder output shaft, a slip ring disposed on the outer surface of the sealing barrel, and fixing blocks disposed on both sides of the inner surface of the slip ring. Slide plates are disposed at the bottom of both fixing blocks, and the two slide plates are respectively disposed on the top of the second spring on the same side. Friction assemblies are disposed inside both fixing blocks. Transmission rods are disposed at the bottom of both sides of the C-shaped plate, and limit blocks are disposed at the bottom of the transmission rods. Friction wheels are disposed at the bottom of the limit blocks. Hinge shafts are distributed in a ring on the outer surface of the slip ring, and inclined plates are disposed at the bottom of the hinge shafts.

[0017] Preferably, the oil scraping assembly includes an open box rotatably disposed inside the hinge shaft, a float ball is disposed in the middle of the open box, two float balls are disposed at the rear of the open box, an oil storage pipe is disposed at the bottom of the open box and connected thereto, a counterweight ball is disposed at the bottom of the oil storage pipe, a hinge cover is disposed at one end of the oil storage pipe, and a contact plate for pressing the hinge cover is disposed on one side of the top of the fan-shaped plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In this invention, a hydraulic cylinder works in conjunction with an injection mechanism to rapidly disperse air bubbles using internal stirring blades. This allows the flocculant carried by the bubbles to diffuse evenly throughout the wastewater, preventing premature breakage of micro-flocs during aeration and eliminating treatment dead zones caused by uneven agent concentration. Simultaneously, it ensures that the bubbles penetrate deep into the wastewater without causing water turbulence, effectively improving the aggregation efficiency of impurities in oily wastewater and reducing impurity coagulation time.

[0020] 2. In this invention, the collection mechanism allows for cleaning without disassembling the equipment. Simply start the internal motor to rotate the scraper, which scrapes the impurities into the collection bucket. Compared with existing filter-type collection, this device effectively reduces downtime, thereby significantly reducing the intensity of manual cleaning and the impurity residue rate, and effectively improving the efficiency of impurity recovery.

[0021] 3. The oil scraping mechanism, in conjunction with its internal counterweight ball, allows the oil storage pipe to adhere to the water surface for oil scraping, avoiding the problem of existing fixed scrapers failing to scrape oil or scraping only water. After oil scraping is completed, the hydraulic cylinder lifts the oil scraping assembly, and the hinge cover automatically opens upon collision with the contact plate, allowing the floating oil to pour into the oil storage ring and flow to the second collection bucket. This eliminates the need for manual emptying, effectively improving the efficiency of floating oil removal and reducing the risk of secondary pollution from floating oil.

[0022] 4. This device integrates a liquid level sensor, hydraulic cylinder, and motor for coordinated control: the liquid level sensor automatically monitors the influent water level to prevent excessive or insufficient wastewater; the hydraulic cylinder and motor work together to control the entire process of flocculant injection, aeration intensity, impurity collection, and oil skimming, eliminating the need for manual judgment of when to add chemicals or skim oil. Compared to existing devices, this effectively improves the effluent compliance rate while significantly reducing the intensity of manual cleaning. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0025] Figure 3 This is a schematic cross-sectional view of the injection mechanism of the present invention;

[0026] Figure 4 This is a schematic cross-sectional view of the added component structure of the present invention;

[0027] Figure 5 This is a cross-sectional structural diagram of the transmission component of the present invention;

[0028] Figure 6 This is a schematic cross-sectional view of the oil scraping mechanism of the present invention;

[0029] Figure 7 This is a schematic cross-sectional view of the rotating component of the present invention;

[0030] Figure 8 This is a schematic cross-sectional view of the oil scraping assembly of the present invention;

[0031] Figure 9 This is a partial structural diagram of the oil scraping assembly of the present invention;

[0032] Figure 10 This is a schematic cross-sectional view of the collection mechanism of the present invention;

[0033] Figure 11 For the present invention Figure 10 Enlarged view of point A in the middle;

[0034] Figure 12 This is a schematic cross-sectional view of the snap-fit ​​assembly of the present invention;

[0035] Figure 13 For the present invention Figure 12 Enlarged view of section B in the middle.

[0036] In the diagram: 1. Processing tank; 2. Flocculation tank; 3. Collection tank one; 4. Collection tank two; 5. Hydraulic cylinder; 6. Injection mechanism; 61. Motor; 62. Baffle plate; 63. Cavity ring; 64. Injection tube; 65. Addition component; 651. Bend; 652. Vertical tube; 653. Spring one; 654. Push rod; 655. Annular plate; 656. L-shaped ring; 657. Extrusion hole; 658. Sealing rod; 659. Air box; 66. Transmission component one; 661. Sealing tube one; 662. Piston disc; 663. Sealing tube two; 664. Damping rod; 665. Splined bushing one; 666. Pressure plate; 67. Stirring blade; 7. Collection mechanism; 71. Impurity storage ring; 72. Filter hole; 73. Scraper; 74. Arc plate; 75. Transmission component two; 7 51. Sealed barrel; 752. Spring II; 753. Bushing II; 754. Splined shaft II; 755. Arc-shaped ring plate; 756. Drive shaft; 757. Snap-fit ​​assembly; 7571. Turntable; 7572. Spring sleeve; 7573. Rotary ring; 8. Oil scraping mechanism; 81. Oil storage ring; 82. Fan-shaped plate; 83. Rotating assembly; 831. C-shaped plate; 832. Fixing block; 833. Slip ring; 834. Slide plate; 835. Hinge shaft; 836. Friction assembly; 837. Drive rod; 838. Limiting block; 839. Friction wheel II; 84. Oil scraping assembly; 841. Open box; 842. Oil storage pipe; 843. Float I; 844. Float II; 845. Counterweight ball; 846. Hinge cover; 847. Contact plate; 9. Processing barrel. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0038] Before implementing this project, a liquid level sensor, which is based on existing technology, needs to be installed at the bottom of the oil scraping mechanism 8. After the oily wastewater is injected into the treatment tank 9, the liquid level sensor can detect that the discharged oily wastewater has reached the set water level line.

[0039] Example 1, as Figures 1 to 13 As shown, an oily wastewater treatment device for oil extraction sites includes a treatment tank 1 for treating oily wastewater. Inside the treatment tank 1 is a treatment bucket 9 for holding the oily wastewater. A flocculant-adding bucket 2 is located on one side of the bottom of the treatment tank 1. An injection mechanism 6 is located at the bottom of the treatment tank 1, and a hydraulic cylinder 5 is located at the top of the treatment tank 1. The hydraulic cylinder 5, in conjunction with the injection mechanism 6, is used to quantitatively inject the flocculant from the flocculant bucket 2 into the treatment bucket 9, while simultaneously injecting air into the oily wastewater. A collection mechanism 7 for collecting impurities is located on the upper middle side of the treatment tank 1. An oil scraping mechanism 8 for scraping floating oil from the surface of the oily wastewater is located at the top of the inner cavity of the treatment tank 1. A second collection bucket 4 for collecting floating oil is located on one side of the top of the treatment tank 1, and a first collection bucket 3 is located on the other side of the outer surface of the treatment tank 1. The injection mechanism 6, in conjunction with the collection mechanism 7, scrapes the collected impurities into the first collection bucket 3.

[0040] In this case, external oily wastewater is first connected to an inlet pipe located on the top side of treatment tank 1 via a connecting pipe. Then, the oily wastewater is discharged into treatment tank 9 inside treatment tank 1 through the inlet pipe. Once the liquid level sensor detects that the oily wastewater has reached the set water level line, the water level input into treatment tank 9 is stopped. A flocculant-adding tank 2 is located on the bottom side of treatment tank 1. After the oily wastewater is discharged, the operator adds the prepared flocculant into the flocculant-adding tank 2. Simultaneously, an injection mechanism 6 is located at the bottom of treatment tank 1. At this time, by activating hydraulic cylinder 5, the hydraulic cylinder 5 compresses the internal structure of injection mechanism 6, quantitatively injecting the flocculant from flocculant-adding tank 2 into treatment tank 9. After injection, the internal structure of injection mechanism 6 continues to operate, compressing the air within its structure, causing the compressed air to be injected upwards from the bottom of treatment tank 9. This generates bubbles inside the oily wastewater, which rise upwards, carrying the injected flocculant within the oily wastewater. The internal structure of the injection mechanism 6 is activated, causing it to rotate and stir within the oily wastewater. This stirring breaks up air bubbles within the wastewater into denser bubbles, accelerating the diffusion of the flocculant and causing impurities to quickly condense into larger flocs. Simultaneously, as air is injected into the wastewater through the injection mechanism 6, the generated bubbles adsorb the impurities, causing them to roll upwards. A collection mechanism 7 for collecting impurities is located on the upper side of the middle of the treatment tank 1. The hydraulic cylinder 5 pulls the internal structure of the collection mechanism 7 upwards, while the internal structure of the injection mechanism 6 continues to rotate. This allows the internal structure of the injection mechanism 6 to work in conjunction with the internal structure of the collection mechanism 7 to push the rolled-up impurities into the collection mechanism 7 for collection. This process is repeated by adding flocculant and injecting air, then stirring and driving the collection mechanism 7 to collect impurities, achieving a multi-stage filtration effect.

[0041] When the solid impurities in the oily wastewater inside the treatment tank 9 have been mostly collected by the internal structure of the collection mechanism 7, a certain amount of floating oil may still remain on the surface of the oily wastewater. An oil scraping mechanism 8 is installed at the top of the inner cavity of the treatment tank 1 to scrape off the floating oil from the surface of the oily wastewater. After the final addition of flocculant and injection of air bubbles into the oily wastewater, the output end of the hydraulic cylinder 5 stops rising and continues to descend. During this descent, the output end of the hydraulic cylinder 5 drives the internal structure of the oil scraping mechanism 8 to move, causing the internal structure of the oil scraping mechanism 8 to descend. When the internal structure of the oil scraping mechanism 8 descends and contacts the internal structure of the collection mechanism 7, the outer structure of the oil scraping mechanism 8 floats on the surface of the oily wastewater. Then, the injection machine is started. The internal drive structure of the collection mechanism 7 rotates, and during the movement of the internal structure of the collection mechanism 7, the internal structure of the oil scraping mechanism 8, which has descended and is in contact with its internal structure, moves synchronously. This causes the structure of the oil scraping mechanism 8, which is floating on the surface of the oily wastewater, to rotate 45 degrees. While rotating, the oil on the surface of the oily wastewater is collected into its internal container. After the oil is collected, the internal structure of the oil scraping mechanism 8 is raised by the hydraulic cylinder 5. After the internal structure of the oil scraping mechanism 8 rises away from the surface of the oily wastewater, the collected oil is poured into one side of the internal structure of the oil scraping mechanism 8. Then, through the internal structure, the oil flows into the collection bucket 2 4 set on the top side of the treatment tank 1 for collection.

[0042] After the floating oil is collected, the pre-treated oily wastewater is discharged from the connecting pipe on the bottom side of the outer arc surface of the treatment tank 1 to the next process for further treatment by the operator. After the treated oily wastewater inside the treatment tank 9 is discharged, the internal structure of the collection mechanism 7 is pulled out. Then, the hydraulic cylinder 5 is started to drive the internal structure of the collection mechanism 7 to squeeze and adhere. Then, the internal structure of the injection mechanism 6 is started to drive the internal structure of the collection mechanism 7 to rotate, so that the internal structure of the collection mechanism 7 rotates and scrapes the impurities collected inside into the collection tank 3 set on the other side of the treatment tank 1.

[0043] Specifically, to achieve the purpose of flocculant injection and bubble injection, refer to Figure 3 , Figure 4 and Figure 5In this scheme, the injection mechanism 6 includes a baffle 62 located at the bottom of the inner cavity of the treatment tank 1 and a cavity ring 63 connected to the inner cavity of the flocculation tank 2. The top of the cavity ring 63 is provided with a number of injection tubes 64 arranged in a ring array. The bottom of the cavity ring 63 is also provided with an addition component 65 for squeezing flocculant and air into the interior of the treatment tank 9. The middle of the baffle 62 is provided with a transmission component 66. The outer side of the transmission component 66 is also provided with stirring blades 67 for stirring and accelerating the diffusion of the added flocculant and air. The bottom of the treatment tank 1 is also provided with a motor 61 for transmission. The side of the injection tubes 64 away from the cavity ring 63 all penetrate the outer surface of the treatment tank 9 and are connected to the inner cavity of the treatment tank 9.

[0044] In the above process, the operator first injects the flocculant into the inner cavity of the flocculant tank 2. At the same time as the flocculant is injected into the flocculant tank 2, it flows directly into the inner cavity of the cavity ring 63 through the bottom. Then, at the bottom of the cavity ring 63, there is an addition component 65 that squeezes the flocculant and air into the treatment tank 9. Then, a transmission component 66 is set in the middle of the partition 62. On the outside of the transmission component 66, there is a stirring blade 67 that stirs and accelerates the diffusion of the added flocculant and air. At the bottom of the treatment tank 1, there is a motor 61 for driving the stirring blade 67 to stir.

[0045] The side of the injection tube 64 away from the cavity ring 63 penetrates the outer surface of the treatment tank 9 and is connected to the inner cavity of the treatment tank 9. The nozzle of the injection tube 64 can adopt the nozzle structure of the "screaming beverage" in the prior art. When the inner cavity of the cavity ring 63 is subjected to a certain pressure, the flocculant will be injected into the oily wastewater from the nozzle of the injection tube 64. At the same time, it is ensured that the oily wastewater inside the treatment tank 9 will not enter the injection tube 64 through the nozzle.

[0046] Specifically, in order to achieve the purpose of squeezing out flocculants and air, refer to Figure 4 and Figure 5 In this scheme, the transmission assembly 66 includes a sealing pipe 661 disposed between the processing tank 1 and the partition 62, a sealing pipe 663 disposed in the middle of the partition 62, a pressure plate 666 disposed inside the sealing pipe 663, damping rods 664 disposed on both sides of the bottom of the pressure plate 666, a splined bushing 665 disposed in the middle of the lower end of the pressure plate 666, and a piston disc 662 for compressing air disposed at the bottom of the two damping rods 664.

[0047] In the above process, the hydraulic cylinder 5 pushes down to push the pressure plate 666 inside the sealing tube 2 663. The pressure plate 666 then pushes the damping rod 664, which in turn pushes the piston plate 662 to slide in the inner cavity of the sealing tube 1 661. This forces the air inside the sealing tube 1 661 to enter the additive component 65 through the through holes around the bottom of the sealing tube 1 661. This process aims to inject the flocculant into the oily wastewater and to inject air into the oily wastewater.

[0048] In the above, the damping rod 664 used can achieve the effect of hydraulic and mechanical friction in the prior art so that when the force pushing the piston disc 662 down to squeeze the air, the damping rod 664 will not retract. A certain amount of force is required to retract it. A one-way valve in the prior art is set at the bottom of the sealing tube 661 so that the air in the inner cavity of the sealing tube 661 can be replenished at the same time during the process of the piston disc 662 rising after squeezing.

[0049] Specifically, in order to achieve the goal of squeezing flocculant and air into oily wastewater, refer to Figure 4 and Figure 5 In this scheme, the added component 65 includes sealing tubes 661 arranged in a ring on the outer surface of the bend 651. Springs 653 are provided in the inner cavity of the side of the bend 651 away from the sealing tubes 661. Push rods 654 are provided on the upper part of the springs 653. The top of the push rods 654 are provided with an annular plate 655 to maintain synchronous balance. Sealing rods 658 are arranged in a ring on the top of the annular plate 655. An L-shaped ring 656 for squeezing flocculant is also slidably installed in the inner cavity of the cavity ring 63. Squeezing holes 657 are arranged in a ring at the bottom of the L-shaped ring 656. The top of the sealing rod 658 matches the bottom of the inner cavity of the squeezing hole 657 on the same side. A vertical tube 652 is also provided on the upper part of the horizontal part of the bend 651. An air box 659 is provided on the top of the vertical tube 652.

[0050] In the above, the compressed gas pushes the bottom of the push rod 654 upward to compress the annular plate 655 from the inner cavity of the bend 651, causing the annular plate 655 to push the sealing rod 658 to rise. This causes the sealing rod 658 to rise and push the bottom of the extrusion hole 657 and the L-shaped ring 656 to rise synchronously, and the flocculant squeezed between the L-shaped ring 656 and the cavity ring 63 is injected into the treatment tank 9 from the injection tube 64. Then, a vertical pipe 652 is also provided on the upper part of the horizontal part of the bend 651, and an air box 659 is also provided on the top of the vertical pipe 652.

[0051] A nozzle identical to that of the injection tube 64 is also provided at the top of the air box 659. The diameter of the vertical tube 652 is smaller than that of the bend 651. Combined with the resistance of the nozzle in the air box 659, the pressure applied by the L-shaped ring 656 after it comes into contact with the top wall of the cavity ring 63 is concentrated in the inner cavity of the vertical tube 652. This allows the applied air pressure to enter the oily wastewater through the nozzle in the air box 659, generating bubbles. Then, as the piston disc 662 rises, the air pressure in the inner cavity of the sealing tube 661 returns to normal through the one-way valve, thus allowing the spring to... Spring 653 pulls push rod 654 down, causing sealing rod 658 to leave the inner cavity of extrusion hole 657 first, allowing a certain amount of air to enter between L-shaped ring 656 and cavity ring 63, thus separating them. L-shaped ring 656 then falls back into the top of sealing rod 658, achieving a sealing state between L-shaped ring 656 and cavity ring 63. After L-shaped ring 656 slides down, its side wall leaves the connection between flocculation tank 2 and cavity ring 63, allowing the flocculant inside flocculation tank 2 to flow back into cavity ring 63 by gravity.

[0052] Specifically, in order to collect impurities after flocculation, refer to Figures 10 to 13 In this scheme, the collection mechanism 7 includes a storage ring 71 set on the upper part of the inner wall of the processing tank 1, a number of filter holes 72 are opened on the upper part of the surface of the processing tank 9, a number of scrapers 73 for scraping impurities are arranged in a ring in the inner cavity of the storage ring 71, an arc plate 74 is set on the upper part of the scrapers 73, and a transmission component 75 is set on the top of the inner cavity of the processing tank 1.

[0053] In the above-mentioned process, the internal structure of the transmission assembly 75 is connected to the top of the splined bushing 665. Simultaneously with the start of the motor 61, the stirring blade 67 is driven to rotate and stir. Then, the hydraulic cylinder 5 is activated, causing the internal structure of the transmission assembly 75 to move upwards. Then, the motor 61 is activated again. During this stirring process, the arc-shaped plate 74 and the scraper 73 can be rotated synchronously. During the rotation of the arc-shaped plate 74, its arc design can push impurities adhering to air bubbles towards the impurity storage ring 71, causing the impurities to be pushed to the edge and then fall into the inner cavity of the impurity storage ring 71 by gravity. Simultaneously, if... The dry scraper 73 rotates to move the impurities within the impurity storage ring 71. When it is necessary to clean the impurities contained in the impurity storage ring 71, after the oily wastewater is treated, the treated wastewater is extracted. As the water level gradually decreases, the wastewater inside the impurity storage ring 71 will also flow through the filter hole 72 to the bottom of the treatment tank 9. After the discharge is complete, the plug on one side of the impurity storage ring 71 is pulled out. The motor 61 is started to drive the internal structure of the transmission component 2 75 to rotate, which in turn drives the arc plate 74 and the scraper 73 to rotate and scrape the impurities in the impurity storage ring 71 into the collection tank 1 3.

[0054] Specifically, in order to achieve the purpose of stirring and scraping off impurities from oily wastewater, refer to Figure 10to Figure 13 In this scheme, the transmission assembly 75 includes a sealed barrel 751 set at the top of the inner cavity of the processing tank 1. A bushing 753 is rotatably set at the bottom of the inner cavity of the sealed barrel 751. A spline shaft 754 is slidably set in the inner cavity of the bushing 753. A transmission shaft 756 is set in the middle of the spline shaft 754. The top of the transmission shaft 756 is rotatably installed with the output end of the hydraulic cylinder 5. The bottom of the transmission shaft 756 is connected to the shaft core of the spline bushing 665. An arc-shaped ring plate 755 is also set on the surface of the bushing 753. A snap-fit ​​assembly 757 is set at the bottom of the surface of the sealed barrel 751. Sliding cavities are also opened on both sides of the surface of the sealed barrel 751. A spring 752 is also set inside the sliding cavity.

[0055] In the above, the splined bushing 665 is driven by the motor 61 to rotate the splined shaft 754. During the rotation of the splined shaft 754, the arc-shaped ring plate 755 is rotated. When the arc-shaped ring plate 755 rotates, it drives the internal structure of the oil scraping mechanism 8 to move and scrape off the floating oil on the surface of the oily wastewater.

[0056] A snap-fit ​​assembly 757 is provided at the bottom of the surface of the sealed barrel 751. The internal structure of the snap-fit ​​assembly 757 is driven by the drive shaft 756 to move, which can drive the stirring blade 67 to stir the oily wastewater and scrape the impurities in the inner cavity of the impurity storage ring 71. Sliding cavities are also provided on both sides of the surface of the sealed barrel 751, and springs 752 are also provided inside the sliding cavities.

[0057] Furthermore, the snap-fit ​​assembly 757 includes a rotating ring 7573 rotatably disposed at the bottom of the sealing barrel 751, and a turntable 7571 is also snapped onto the inner surface of the rotating ring 7573. A plurality of spring sleeves 7572 are also arranged in a ring on the top of the turntable 7571.

[0058] In the above, a hole adapted to the spring sleeve 7572 is opened at the bottom of the inner surface of the rotating ring 7573. When the oily wastewater is stirred, the drive shaft 756 lowers the rotating disc 7571 and the spring sleeve 7572 to the bottom of the rotating ring 7573. After the oily wastewater is treated, when it is necessary to scrape off the impurities in the inner cavity of the impurity storage ring 71, the hydraulic cylinder 5 drives the rotating disc 7571 to rise and contact the bottom of the inner side of the rotating ring 7573 and squeeze the spring sleeve 7572. Then, the motor 61 drives the drive shaft 756 to rotate. During the rotation, the spring sleeve 7572 enters the hole opened at the bottom of the rotating ring 7573, thereby driving the rotating ring 7573 to rotate. Since the outer surface of the rotating ring 7573 is connected to the arc plate 74, the arc plate 74 and the scraper 73 can be rotated and scraped off during the rotation of the rotating ring 7573.

[0059] The top of the stirring blade 67 mentioned above is connected to the bottom of the turntable 7571.

[0060] Specifically, in order to achieve the goal of scraping off any floating oil that may be present on the surface of the oily wastewater after impurities are collected in the inner cavity of the impurity storage ring 71, refer to Figures 6 to 9 In this scheme, the oil scraping mechanism 8 includes an oil storage ring 81 set on the top surface of the inner cavity of the treatment tank 1. Several fan-shaped plates 82 are also arranged in a ring on the top of the oil storage ring 81. Oil scraping components 84 for scraping off floating oil are set around the scraper 73. A rotating component 83 is sleeved on the surface of the sealed barrel 751.

[0061] In the above, an oil storage ring 81 for collecting floating oil is provided on the top surface of the inner cavity of the treatment tank 1. Several fan-shaped plates 82 are also arranged in a ring on the top of the oil storage ring 81. Then, a scraper 73 is provided on the surface of the sealed barrel 751. Scraping components 84 for scraping off floating oil are provided around the scraper 73.

[0062] Specifically, in order to achieve the purpose of driving the oil scraper assembly 84 to scrape away floating oil, refer to Figure 7 In this scheme, the rotating component 83 includes a C-shaped plate 831 disposed on the surface of the output shaft of the hydraulic cylinder 5, a slip ring 833 disposed on the sealing barrel 751, and fixing blocks 832 disposed on both sides of the inner surface of the slip ring 833. Slide plates 834 are disposed at the bottom of both fixing blocks 832, and the two slide plates 834 are respectively disposed on the top of the spring 752 on the same side. Friction components 836 are disposed inside both fixing blocks 832. Transmission rods 837 are disposed at the bottom of both sides of the C-shaped plate 831. Limiting blocks 838 are disposed at the bottom of the transmission rods 837. Friction wheels 839 are disposed at the bottom of the limiting blocks 838. Hinge shafts 835 are distributed in a ring on the outer surface of the slip ring 833, and inclined plates are disposed at the bottom of the hinge shafts 835.

[0063] In the above description, the friction assembly 836 consists of two friction wheels and a belt. The two friction wheels near the slip ring 833 are in close contact with the inner wall of the slip ring 833. When the C-shaped plate 831 is lowered to a certain distance by the hydraulic cylinder 5, the limiting blocks 838 on both sides of the bottom of the C-shaped plate 831 are pressed down. This causes the two transmission rods 837 to pull the fixed blocks 832 and the slip ring 833 on both sides to descend on the surface of the sealing barrel 751. At the same time, the two fixed blocks 832 drive the sliding plate 834 to compress the second spring 752. Then, a second friction wheel 839 is set at the bottom of the limiting block 838. When it descends to a certain distance, the second friction wheel 839 contacts the arc-shaped ring plate 755. The two friction wheels 839 rotate synchronously during the rotation of the two friction wheels 839, which in turn drive the transmission rod 837 to rotate. The transmission rod 837 then drives the upper friction wheel to rotate. Hinge shafts 835 are arranged in a ring on the outer surface of the slip ring 833, causing the friction wheels to rotate on the surface of the sealing barrel 751. The hinge shafts 835 drive the oil scraping assembly 84 to rotate and scrape off the floating oil.

[0064] An inclined plate is provided at the bottom of the hinge shaft 835, which can maintain the tilt of the oil scraper assembly 84 after it is raised.

[0065] Specifically, in order to achieve the purpose of skimming off floating oil, refer to Figure 7 and Figure 8 In this solution, the oil scraping assembly 84 includes an open box 841 rotatably disposed inside the hinge shaft 835. A float ball 843 is disposed in the middle of the open box 841, and two float balls 844 are disposed at the rear of the open box 841. An oil storage pipe 842 connected to the bottom of the open box 841 is disposed thereto. A counterweight ball 845 is disposed at the bottom of the oil storage pipe 842. A hinge cover 846 is disposed at one end of the oil storage pipe 842. A contact plate 847 for pressing the hinge cover 846 is disposed on one side of the top of the fan-shaped plate 82.

[0066] In the above process, the action of float 843 and float 844 keeps the slip ring 833 in place after it descends, and the open box 841 floats horizontally on the surface of the oily wastewater. The action of the counterweight ball 845 keeps the oil storage pipe 842 at the bottom of the wastewater surface. Then, as the slip ring 833 rotates, it drives the open box 841 to rotate on the water surface. During the rotation of the open box 841, the floating oil on the surface of the oily wastewater is scraped into the inner cavity of the oil storage pipe 842. After rotating 45 degrees around the axis of the inner cavity of the treatment tank 9, it rises through the output end of the hydraulic cylinder 5, releasing the pressure of the C-shaped plate 831 on the limit block 838. The bottom of the C-shaped plate 831 contacts the bottom of the fixed block 832, causing the slip ring 833 to rise. As it rises, the opening box 841 is connected to one side, causing it to tilt after leaving the water surface. When it rises to a certain distance, the hinge cover 846 at one end of the oil storage pipe 842 contacts the contact plate 847 located on the top side of the fan-shaped plate 82, causing the hinge cover 846 to open under force. Then, the floating oil collected inside the oil storage pipe 842 can be poured directly into the inner cavity of the oil storage ring 81. The bottom wall of the oil storage ring 81 is inclined, allowing the poured floating oil to flow directly into the collection bucket 2 4.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An oil-polluted water treatment device for an oil production site, comprising a treatment tank (1) for treating oil-polluted water, characterized in that: The processing tank (1) is internally provided with a treatment barrel (9) for containing oil and sewage, one side of the bottom of the processing tank (1) is provided with a flocculation barrel (2) for adding flocculant, the bottom of the processing tank (1) is provided with an injection mechanism (6), the top of the processing tank (1) is provided with a hydraulic cylinder (5), the hydraulic cylinder (5) cooperates with the injection mechanism (6) to quantitatively inject the flocculant in the flocculation barrel (2) into the treatment barrel (9), and at the same time, air is injected into the oil and sewage, the upper side of the middle of the processing tank (1) is provided with a collection mechanism (7) for collecting impurities, the top of the inner cavity of the processing tank (1) is provided with a scraping mechanism (8) for scraping the floating oil on the surface of the oil and sewage, one side of the top of the processing tank (1) is provided with a collection barrel two (4) for collecting floating oil, the other side of the outer surface of the processing tank (1) is also provided with a collection barrel one (3), the injection mechanism (6) cooperates with the collection mechanism (7) to scrape the collected impurities into the collection barrel one (3).

2. The oilfield oily water treatment device according to claim 1, characterized in that: The injection mechanism (6) comprises a partition plate (62) arranged in the inner cavity of the processing tank (1) and a cavity ring (63) in communication with the inner cavity of the flocculation barrel (2), a plurality of injection pipes (64) are arranged in the top of the cavity ring (63) in an annular array, the bottom of the cavity ring (63) is also provided with an adding assembly (65) for extruding the flocculant and air into the treatment barrel (9), the middle of the partition plate (62) is provided with a transmission assembly one (66), the outer side of the transmission assembly one (66) is also provided with stirring blades (67) for stirring and accelerating diffusion of the flocculant and air after being added, the bottom of the processing tank (1) is also provided with a motor (61) for transmission, one side of the injection pipe (64) away from the cavity ring (63) penetrates the outer surface of the treatment barrel (9) and is in communication with the inner cavity of the treatment barrel (9).

3. The oilfield oily water treatment device of claim 2, wherein: The transmission assembly one (66) comprises a sealing pipe one (661) arranged between the processing tank (1) and the partition plate (62), a sealing pipe two (663) arranged in the middle of the partition plate (62), a pressure disc (666) arranged in the sealing pipe two (663), damping rods (664) arranged on both sides of the bottom of the pressure disc (666), a spline shaft sleeve one (665) arranged in the middle of the lower end of the pressure disc (666), and a piston disc (662) arranged at the bottom of the two damping rods (664) for extruding air.

4. The oilfield oily water treatment device of claim 3, wherein: The adding assembly (65) comprises a sealing pipe one (661) annularly arranged on the outer surface of the elbow pipe (651), the inner cavities of the plurality of elbow pipes (651) away from one side of the sealing pipe one (661) are respectively provided with a plurality of spring ones (653), the upper portions of the plurality of spring ones (653) are respectively provided with a plurality of push rods (654), the top portions of the plurality of push rods (654) are jointly provided with an annular plate (655) for keeping balance, the top portion of the annular plate (655) is further annularly provided with a sealing rod (658), the inner cavity of the cavity ring (63) is further slidably provided with an L-shaped ring (656) for extruding the flocculating agent, the bottom portion of the L-shaped ring (656) is annularly provided with an extruding hole (657), the top portion of the sealing rod (658) is matched with the bottom portion of the inner cavity of the same side extruding hole (657), the upper portion of the horizontal portion of the elbow pipe (651) is further provided with a vertical pipe (652), and the top portion of the vertical pipe (652) is provided with a gas box (659).

5. The oilfield oily water treatment device of claim 4, wherein: The collecting mechanism (7) comprises a storage ring (71) arranged on the inner cavity side wall of the treatment tank (1), a plurality of filter holes (72) are formed in the upper portion of the surface of the treatment barrel (9), a plurality of scraping plates (73) for scraping impurities are annularly arranged in the inner cavity of the storage ring (71), the upper portions of the plurality of scraping plates (73) are respectively provided with an arc-shaped plate (74), and the inner cavity top of the treatment tank (1) is provided with a transmission assembly two (75).

6. The oilfield oily water treatment device of claim 5, wherein: The transmission assembly two (75) comprises a sealing barrel (751) arranged on the inner cavity top of the treatment tank (1), an axle sleeve two (753) is rotatably arranged in the inner cavity bottom of the sealing barrel (751), a spline shaft two (754) is slidably arranged in the inner cavity of the axle sleeve two (753), a transmission shaft (756) is arranged on the middle portion of the spline shaft two (754), the top portion of the transmission shaft (756) is rotatably connected with the output end of the hydraulic cylinder (5), the bottom portion of the transmission shaft (756) is connected with the shaft center of the spline shaft sleeve one (665), the surface of the axle sleeve two (753) is further provided with an arc-shaped ring plate (755), a clamping assembly (757) is arranged on the surface bottom of the sealing barrel (751), and spring two (752) is arranged in the sliding cavity.

7. The oilfield produced water treatment device of claim 6, wherein: The clamping assembly (757) comprises a rotating ring (7573) rotatably arranged on the bottom of the sealing barrel (751), the inner surface of the rotating ring (7573) is further clamped with a rotating disc (7571), and the top portion of the rotating disc (7571) is further annularly provided with a plurality of spring sleeves (7572).

8. The oilfield produced water treatment device of claim 7, wherein: The oil scraping mechanism (8) comprises an oil storage ring (81) arranged on the inner cavity top surface of the treatment tank (1), a plurality of fan-shaped plates (82) are annularly arranged on the top portion of the oil storage ring (81), the periphery of the scraping plate (73) is provided with an oil scraping assembly (84) for scraping floating oil, and the surface of the sealing barrel (751) is sleeved with a rotating assembly (83).

9. The oilfield produced water treatment device of claim 8, wherein: The rotating assembly (83) comprises a C-shaped plate (831) arranged on the output shaft surface of the hydraulic cylinder (5), the outer surface of the sealing barrel (751) is provided with a slip ring (833), the inner surface of the slip ring (833) is further provided with a fixed block (832) on both sides, the bottom of the two fixed blocks (832) is provided with a sliding plate (834), the two sliding plates (834) are arranged on the top of the same side spring two (752) respectively, the inside of the two fixed blocks (832) is provided with a friction assembly (836), the bottom of the two sides of the C-shaped plate (831) is further provided with a transmission rod (837), the bottom of the transmission rod (837) is provided with a limiting block (838), the bottom of the limiting block (838) is provided with a friction wheel two (839), the outer surface of the slip ring (833) is annularly provided with a hinge shaft (835), and the bottom of the hinge shaft (835) is provided with an inclined plate.

10. The oilfield produced water treatment device of claim 9, wherein: The oil scraping assembly (84) comprises an open box (841) rotatably arranged in the hinge shaft (835), the middle of the open box (841) is provided with a floating ball one (843), the rear of the open box (841) is further provided with two floating ball two (844), the bottom of the open box (841) is further provided with an oil storage pipe (842) in communication therewith, the bottom of the oil storage pipe (842) is provided with a counterweight ball (845), one end of the oil storage pipe (842) is further provided with a hinge cover (846), and one side of the top of the fan-shaped plate (82) is further provided with a contact plate (847) for extruding the hinge cover (846).

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