Series graphene filler oil-water separation and purification device

Abstract

The application belongs to the field of industrial oily wastewater treatment, and discloses a series connection type graphene filler oil-water separation and purification device, which comprises a pressure stabilizing buffer box, a water inlet pipeline, a water outlet pipeline, a Venturi jet pipe and an oil-water separation tank body; the water inlet pipeline, the pressure stabilizing buffer box, the water outlet pipeline, the Venturi jet pipe and the oil-water separation tank body are sequentially connected; when the device is used, the pressure stabilizing buffer box is used in cooperation with a double-side symmetrical buffer guide plate and a double-sliding cavity linkage structure, so that automatic turbulence elimination and flow stabilization, hydraulic energy storage gas production can be realized during water flow conveying, water flow turbulence can be effectively broken, water flow shear force can be eliminated, the problem of secondary breaking of emulsified oil droplets can be avoided, the oil droplet agglomeration state can be preserved to the maximum extent, the purification load of the rear-end graphene filler can be reduced, the overall oil-water separation precision can be improved, the gas pressure output of the double-side synchronous gas production structure is uniform and stable, the passive synchronous opening and closing of the medicament passage can be realized without power driving, and the waterway on-off state is matched.

Description

Technical Field

[0001] This invention relates to the field of industrial oily wastewater treatment technology, and in particular to a series-connected graphene packing oil-water separation and purification device. Background Technology

[0002] During industrial production, a large amount of oily wastewater is generated. This type of wastewater contains suspended oil, dispersed oil, and fine emulsified oil droplets. Its water composition is complex and highly stable. Direct discharge will cause serious water pollution. Therefore, it must be purified by special oil-water separation equipment.

[0003] Some existing oil-water separation equipment uses a series graphene packing structure to adsorb and purify oily wastewater. However, relying solely on the adsorption effect of graphene packing results in poor pretreatment. Sometimes, the influent water flow is turbulent and the shear force is high, which can easily break up the original agglomerated oil droplets in the wastewater, forming even more difficult-to-treat ultrafine emulsified oil droplets. This significantly increases the difficulty of subsequent oil-water separation. At the same time, the filters used in the pretreatment are mostly fixed installations. Long-term interception of oil residue and suspended impurities can easily lead to pore blockage, requiring frequent manual shutdowns for cleaning and maintenance. This results in a large workload for operation and maintenance and poor stability of continuous equipment operation. Furthermore, the dosing of chemicals often uses active devices such as electrically controlled solenoid valves and dosing pumps for dosing control. These devices have complex structures, high failure rates, and high energy consumption. It is also difficult to achieve precise synchronization between the start and stop of the equipment and the water flow. This can easily lead to problems such as no chemical dosing when water is flowing or continuous chemical absorption and leakage when water is stopped, resulting in waste of chemicals and unstable water treatment accuracy. Summary of the Invention

[0004] This invention provides a series-connected graphene-filled oil-water separation and purification device, which solves the problems of large water flow turbulence, easy secondary emulsification of oil droplets, easy clogging of filter screen, need for electronically controlled dosing and waste of reagents in traditional series-connected graphene-filled oil-water separation equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A series-connected graphene-filled oil-water separation and purification device is provided, comprising a pressure-stabilizing buffer tank, an inlet pipe, an outlet pipe, a Venturi jet pipe, and an oil-water separation tank; the inlet pipe, pressure-stabilizing buffer tank, outlet pipe, Venturi jet pipe, and oil-water separation tank are sequentially connected; a buffer mechanism is disposed inside the pressure-stabilizing buffer tank, and the buffer mechanism can swing and displace under the impact of water flow; a self-cleaning mechanism linked to the buffer mechanism is also disposed inside the pressure-stabilizing buffer tank, and the self-cleaning mechanism can achieve reciprocating shaking and self-cleaning with the swinging motion of the buffer mechanism; a dosing mechanism is provided in conjunction with the Venturi jet pipe, and the air inlet end of the dosing mechanism is connected to the gas generation end of the buffer mechanism, which can use compressed gas to realize the automatic opening and closing of the reagent passage to match the water flow opening and closing to achieve synchronous passive dosing.

[0006] Preferably, the buffer mechanism includes two supporting shafts, two buffer guide plates, two sliding cavities, two pressure-bearing push blocks, two transmission rods, two sliders, and two buffer springs; the two supporting shafts are symmetrically fixed on both sides of the inner wall of the pressure-stabilizing buffer box, the two buffer guide plates are rotatably sleeved on the outer surface of the two supporting shafts, the two sliding cavities are fixedly installed on the inner walls of both sides of the pressure-stabilizing buffer box, the two pressure-bearing push blocks are slidably embedded in the inner walls of the two sliding cavities, the two pressure-bearing push blocks are fixedly connected to the two transmission rods, the two transmission rods are hinged to one side of the two sliders, and the two buffer springs are respectively located inside the two sliding cavities for resetting the pressure-bearing push blocks.

[0007] Preferably, two limiting grooves are provided on one side of each of the two buffer guide plates, and the two sliders are respectively slidably disposed on the inner wall of the two limiting grooves. Two water-proof baffles are fixedly installed on the inner wall of the pressure stabilizing buffer box. The two water-proof baffles are respectively set at the connection position between the support shaft and the buffer guide plate, and are used to block the shaft gap and prevent water flow. Multiple flow-guiding arc grooves are provided on one side of each of the two buffer guide plates.

[0008] Preferably, the self-cleaning mechanism includes a mounting frame, a filter screen, two T-shaped grooves, two T-shaped hinge seats, and multiple hinged rods; the filter screen is fixedly installed inside the mounting frame, the two T-shaped grooves are opened on the rear side of the mounting frame, the two T-shaped hinge seats are slidably engaged with the inner walls of the two T-shaped grooves respectively, and multiple hinged rods are hinged between the two T-shaped hinge seats and the buffer guide plate.

[0009] Preferably, a total of four hinged rods are provided, forming two sets of scissor-type linkage structures in pairs. The two sets of scissor-type linkage structures are symmetrically arranged corresponding to two buffer guide plates. The two buffer guide plates are symmetrically inclined and opposite each other, and an initial convergence and guiding angle of 40° to 60° is formed between the two buffer guide plates, which is used to converge and buffer the influent water flow and to reduce turbulence and stabilize the flow.

[0010] Preferably, the bottom of the mounting frame is provided with a rectangular positioning through hole, which is located on one side of the bottom of the mounting frame. A positioning pin is slidably inserted into the inner wall of the rectangular positioning through hole, and a sealing baffle is slidably provided on one side of the positioning pin. The sealing baffle is detachably and sealingly installed on the outer wall of the pressure stabilizing buffer box.

[0011] Preferably, the dosing mechanism includes a dosing connector, a liquid control box, a liquid delivery pipe, a sliding sealing plate, an L-shaped linkage plate, a drive cylinder, a push plate, a transmission rod, a return spring, two gas guide branches, and a main gas guide pipe; the dosing connector is connected to the side wall of the Venturi jet pipe, the end of the dosing connector is connected to the liquid control box, the liquid delivery pipe is connected to one side of the liquid control box, the sliding sealing plate is slidably disposed on one side of the liquid control box to block the dosing passage, an L-shaped linkage plate is fixedly disposed on one side of the sliding sealing plate, and the drive cylinder is fixedly disposed on the outside of the liquid control box.

[0012] Preferably, the push plate is slidably embedded in the inner wall of the drive cylinder, a transmission rod is fixedly arranged between the push plate and the L-shaped linkage plate, and the reset spring is movably sleeved on the outer surface of the transmission rod.

[0013] Preferably, the two ends of the reset spring abut against the inner wall of the drive cylinder and the side of the push plate, respectively. The outer sides of the two sliding cavities are respectively connected to gas guide branches. The two gas guide branches are connected to the main gas guide pipe. The main gas guide pipe is connected to the inside of the drive cylinder. Each gas guide branch is equipped with a one-way valve to prevent gas backflow.

[0014] Preferably, the liquid delivery pipe is connected to a drug tank, the drug connector is connected to the negative pressure suction port of the Venturi jet tube, and a one-way valve for preventing backflow is installed on the outer surface of the drug connector.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: This invention employs a pressure-stabilizing buffer tank coupled with a double-sided symmetrical buffer guide plate and a double-sliding cavity linkage structure. This achieves automatic turbulence reduction and flow stabilization, hydraulic energy storage and gas generation during water transport, effectively breaking up water flow turbulence, eliminating water flow shear force, avoiding secondary breakage of emulsified oil droplets, and maximizing the preservation of oil droplet aggregation. This reduces the purification load on the downstream graphene packing from the source, improving overall oil-water separation accuracy. Simultaneously, the double-sided synchronous gas generation structure provides uniform and stable gas pressure output, enabling passive synchronous opening and closing of the reagent passage without electrical drive, matching the water flow's on / off state, preventing leakage and waste during downtime. Furthermore, the dynamic fluctuations in water pressure drive continuous high-frequency reciprocating vibration of the filter screen, achieving dynamic self-cleaning and anti-clogging effects. This eliminates the need for frequent manual downtime cleaning, reducing equipment maintenance workload and downtime losses, ensuring long-term continuous and stable operation. Through the series matching of front-end flow stabilization pretreatment, precise passive dosing, and downstream graphene packing for efficient adsorption and separation, a highly efficient purification system is formed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the scene structure in an embodiment of the present invention.

[0017] Figure 2This is a schematic diagram of the connection between the pressure stabilizing buffer tank, the inlet pipe, the outlet pipe, and the Venturi jet pipe in an embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of the voltage stabilizing buffer box in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the buffer mechanism and self-cleaning mechanism in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the sliding cavity in an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure after the mounting frame and the sealing baffle are separated in an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the drug delivery mechanism in an embodiment of the present invention.

[0023] Figure 8 This is a cross-sectional view of the medicine control box in an embodiment of the present invention.

[0024] Figure 9 This is a cross-sectional view of the drive cylinder in an embodiment of the present invention.

[0025] Legend: 1. Pressure stabilizing buffer tank; 101. Inlet pipe; 102. Outlet pipe; 103. Venturi jet pipe; 104. Oil-water separator; 2. Support shaft; 201. Buffer guide plate; 202. Sliding cavity; 203. Pressure-bearing push block; 204. Transmission connecting rod; 205. Sliding block; 206. Buffer spring; 207. Water-proof baffle; 208. Limiting groove; 3. Mounting frame; 301. Filter screen; 302. T 303. T-shaped sliding groove; 304. T-shaped hinge seat; 305. Hinged tie rod; 306. Rectangular positioning through hole; 307. Positioning pin; 308. Sealing baffle plate; 409. Agent pipe; 4001. Liquid control box; 401. Liquid delivery pipe; 402. Sliding sealing plate; 403. L-shaped linkage plate; 404. Drive cylinder; 405. Push plate; 406. Transmission rod; 407. Return spring; 408. Gas guide branch pipe; 410. Main gas guide pipe. Detailed Implementation

[0026] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figures 1 to 9 As shown, the present invention provides a series-connected graphene-filled oil-water separation and purification device, including a pressure-stabilizing buffer tank 1, an inlet pipe 101, an outlet pipe 102, a Venturi jet pipe 103, and an oil-water separation tank 104; the inlet pipe 101, the pressure-stabilizing buffer tank 1, the outlet pipe 102, the Venturi jet pipe 103, and the oil-water separation tank 104 are connected in sequence to form a complete series-connected wastewater purification water circuit, which can perform step-by-step flow stabilization, filtration, automatic dosing, and oil-water separation treatment on industrial oily wastewater.

[0028] Furthermore, the pressure stabilizing buffer tank 1 is equipped with a buffer mechanism. The buffer mechanism can swing and generate compressed gas under the impact of water flow, providing stable air pressure for subsequent passive dosing. The pressure stabilizing buffer tank 1 is also equipped with a self-cleaning mechanism linked to the buffer mechanism. The self-cleaning mechanism can reciprocate and self-clean with the swinging motion of the buffer mechanism, effectively avoiding filter clogging and ensuring continuous filtration. The Venturi jet tube 103 is equipped with a dosing mechanism. The air inlet of the dosing mechanism is connected to the gas generation end of the buffer mechanism. Compressed gas can be used to realize the automatic opening and closing of the chemical passage, matching the water circuit on / off state to realize passive synchronous dosing throughout the process. No electrical control or dosing pump is required, which is energy-saving and highly adaptable.

[0029] During use, the oily wastewater to be purified is continuously introduced into the pressure-stabilizing buffer tank 1 through the inlet pipe 101. The buffer mechanism inside the tank buffers and reduces turbulence in the high-speed water flow and stores hydraulic energy. At the same time, the self-cleaning mechanism is linked to complete the pre-filtration and filter self-cleaning operations in real time. After the wastewater has been stabilized and filtered, it is transported to the Venturi jet pipe 103 through the outlet pipe 102. The compressed gas generated by the buffer mechanism drives the dosing mechanism to open the chemical passage. Relying on the Venturi negative pressure principle, the chemical is automatically drawn in and fully mixed with the wastewater. Finally, the wastewater mixed with the chemical is transported to the oil-water separation tank 104. The oil-water separation and purification are completed by the graphene packing inside the oil-water separation tank 104. The entire process relies on the power of the water flow itself to realize the linkage operation of filtration, gas generation and automatic chemical dosing. When the water flow is open, the equipment starts; when the water flow is cut off, the equipment stops and resets simultaneously, realizing passive automatic purification operation.

[0030] Please see Figures 1 to 9 In one embodiment, the buffer mechanism includes two supporting shafts 2, two buffer guide plates 201, two sliding cavities 202, two pressure-bearing push blocks 203, two transmission connecting rods 204, two sliders 205, and two buffer springs 206.

[0031] Specifically, two supporting shafts 2 are symmetrically fixed on both sides of the inner wall of the pressure-stabilizing buffer box 1. Two buffer guide plates 201 are rotatably sleeved on the outer surface of the two supporting shafts 2, and can swing back and forth slightly around the supporting shafts 2 to adapt to the dynamic changes of water flow impact. Two sliding cavities 202 are fixedly installed on the inner walls of both sides of the pressure-stabilizing buffer box 1. Two pressure-bearing push blocks 203 are slidably embedded in the inner walls of the two sliding cavities 202, and can slide in a sealed manner along the inner walls of the sliding cavities 202 to realize the compression and depressurization of the air inside the cavities. The two pressure-bearing push blocks 203 are fixedly connected to two transmission rods 204. The two transmission rods 204 are hinged on one side of the two sliders 205 to realize the transmission of force and adaptive adjustment of angle. Two buffer springs 206 are respectively installed inside the two sliding cavities 202 to drive the pressure-bearing push blocks 203 to reset after the water flow impact force disappears, in preparation for the next gas production operation.

[0032] Furthermore, two limiting grooves 208 are provided on one side of each of the two buffer guide plates 201. Two sliders 205 are slidably disposed on the inner wall of the two limiting grooves 208. The limiting grooves 208 can limit the sliding stroke of the sliders 205 to avoid transmission jamming and derailment, and ensure the transmission stability of the buffer mechanism. Two water-proof baffles 207 are fixedly installed on the inner wall of the pressure stabilizing buffer box 1. The two water-proof baffles 207 are respectively set at the connection positions of the support shaft 2 and the buffer guide plate 201. They can effectively block the assembly gap of the shaft, prevent water flow from flowing through the gap and short-circuiting, and force all water flow to flow through the surface of the buffer guide plate 201, so as to give full play to the flow stabilization and buffering effect. Multiple flow-guiding arc grooves are provided on one side of each of the two buffer guide plates 201. The multiple flow-guiding arc grooves disperse the impact force of the high-speed water flow, break the water flow turbulence, eliminate the water flow shear force, avoid secondary breakage and emulsification of emulsified oil droplets in oily wastewater, and improve the subsequent oil-water separation effect.

[0033] It is worth noting that the structure employing a double-sided symmetrical buffer guide plate 201 combined with a double sliding cavity 202 for synchronous gas generation, along with a front-end water flow converging and buffering structure, improves the hydraulic energy utilization rate of the water flow. The double-sided extrusion gas generation provides uniform, sufficient, and consistently stable gas pressure output, which can stably drive the opening and closing of the dosing mechanism. Furthermore, the multiple flow-guiding arc-shaped grooves on the surface of the buffer guide plate 201, combined with a 40°–60° converging and guiding angle, can divert, decelerate, and rectify the high-speed incoming water, effectively breaking up the turbulence generated during pipeline transportation. The flow and turbulent vortex significantly reduce the lateral shear force and impact shear force of the water flow. The original emulsified oil droplets in the oily wastewater are small in size and fragile in structure. The strong shearing action of traditional high-speed turbulent water flow can easily cut and tear the agglomerated oil droplets into ultrafine emulsified oil droplets, causing secondary emulsification and making oil-water separation difficult. By pre-stabilizing the flow and eliminating turbulence, the shearing and destructive effect of the water flow is weakened, which effectively avoids secondary breakage and emulsification of emulsified oil droplets, preserves the agglomerated state of oil droplets to the greatest extent, and improves the treatment effect and separation accuracy of the subsequent oil-water separator 104.

[0034] Please see Figures 1 to 9 In one embodiment, the self-cleaning mechanism includes a mounting frame 3, a filter screen 301, two T-shaped grooves 302, two T-shaped hinge seats 303, and a plurality of hinge rods 304.

[0035] Specifically, the filter screen 301 is fixedly installed inside the mounting frame 3, which can pre-filter suspended impurities and oil residue in the influent oily wastewater, preventing impurities from entering the rear Venturi jet pipe 103 and oil-water separation tank 104 and causing blockage. Two T-shaped slides 302 are opened on the rear side of the mounting frame 3, and two T-shaped hinge seats 303 are respectively slidably engaged with the inner wall of the two T-shaped slides 302. The T-shaped structure has a bidirectional limiting effect, slides smoothly without deviation, and is not easy to fall off. Multiple hinge rods 304 are hinged between the two T-shaped hinge seats 303 and the buffer guide plate 201 to realize the linkage transmission between the buffer mechanism and the self-cleaning mechanism.

[0036] Furthermore, a total of four hinged tie rods 304 are provided, forming two sets of scissor-type linkage structures in pairs. The two sets of scissor-type linkage structures are symmetrically arranged corresponding to two buffer guide plates 201, resulting in uniform transmission force and high stability. The two buffer guide plates 201 are symmetrically inclined and opposite each other, and an initial convergence and guiding angle of 40° to 60° is formed between the two buffer guide plates 201. The 40° to 60° angle is the optimal convergence and buffer angle, which can converge and gather the incoming water flow, eliminate turbulence and stabilize the flow, greatly reduce the water flow velocity, and weaken the water flow impact and fluctuation. This ensures that there is sufficient hydraulic driving force to drive the guide plates to swing and generate gas, while avoiding the problems of flow stabilization failure and oil droplet emulsification caused by excessive water flow velocity.

[0037] It is worth noting that the scissor-type four-bar linkage structure, coupled with the T-shaped limiting slide groove 302 for matching transmission, ensures precise overall transmission stroke and balanced force distribution. This efficiently converts the minute oscillations of the buffer guide plate 201 into stable reciprocating vibrations of the filter screen 301, resulting in a uniform and continuous self-cleaning effect for the filter screen. Simultaneously, the limiting groove 208 effectively limits the stroke of the slider 205, preventing transmission overload, displacement derailment, and component wear, significantly improving the operational stability and service life of the linkage structure. Please see Figures 1 to 9In one embodiment, a rectangular positioning through hole 305 is provided at the bottom of the mounting frame 3. The rectangular positioning through hole 305 is located on one side of the bottom of the mounting frame 3. A positioning pin 306 is slidably inserted into the inner wall of the rectangular positioning through hole 305. A sealing baffle 307 is slidably provided on one side of the positioning pin 306. The sealing baffle 307 is detachably and sealingly installed on the outer wall of the pressure stabilizing buffer box 1. When too many impurities are trapped on the surface of the filter screen 301 and cleaning and maintenance are required, it is only necessary to remove the sealing baffle 307 and pull out the positioning pin 306. The mounting frame 3 and the filter screen 301 can then be taken out downward along the T-shaped slide groove 302. Cleaning and replacement are convenient and maintenance efficiency is high. After installation, the pressure stabilizing buffer box 1 is sealed to prevent water leakage.

[0038] Please see Figures 1 to 9 In one embodiment, the dosing mechanism includes a drug inlet pipe 4, a drug control box 401, a drug delivery pipe 402, a sliding sealing plate 403, an L-shaped linkage plate 404, a drive cylinder 405, a push plate 406, a transmission rod 407, a reset spring 408, two gas guide branches 409, and a main gas guide pipe 410.

[0039] Specifically, the agent inlet 4 is connected to the side wall of the Venturi jet tube 103, and the end of the agent inlet 4 is connected to the liquid control box 401. The liquid delivery pipe 402 is connected to one side of the liquid control box 401 and is used to connect to an external agent tank to deliver water treatment agents such as demulsifiers and flocculants. The sliding sealing plate 403 is slidably set on one side of the liquid control box 401 and can block or open the agent passage to realize passive control of the drug passage opening and closing. An L-shaped linkage plate 404 is fixedly set on one side of the sliding sealing plate 403, and the drive cylinder 405 is fixedly set on the outside of the liquid control box 401 to provide a sealed working cavity for pneumatic drive.

[0040] Furthermore, the push plate 406 is slidably embedded in the inner wall of the drive cylinder 405, and the transmission rod 407 is fixedly installed between the push plate 406 and the L-shaped linkage plate 404. The reset spring 408 is sleeved on the outer surface of the transmission rod 407 to realize the rapid switching between pneumatic drive and reset spring 408 reset.

[0041] Furthermore, the two ends of the return spring 408 abut against the inner wall of the drive cylinder 405 and the side of the push plate 406, respectively. Under normal operating conditions with no water flow and no air pressure input, the return spring 408 presses against the push plate 406, and drives the sliding sealing plate 403 to maintain the state of blocking the agent passage through the transmission rod 407 and the L-shaped linkage plate 404, thus avoiding continuous leakage of the agent and waste of the agent when the machine is stopped. The outer sides of the two sliding cavities 202 are respectively connected to the gas guide branch pipes 409, and the two gas guide branch pipes 409 together The main gas guide pipe 410 is connected to the inside of the drive cylinder 405. It can collect and transport the compressed gas generated by the sliding chambers 202 on both sides to the inside of the drive cylinder 405, gather the gas pressure on both sides, improve the driving power, and ensure the opening and closing response speed. In addition, the gas guide branch pipes 409 are all equipped with one-way valves to prevent gas backflow. They can lock the gas pressure inside the chamber, prevent the compressed gas from flowing back and depressurizing, ensure the stability of the gas pressure drive, and prevent problems such as delayed opening and closing of the drug circuit or failure.

[0042] Furthermore, the liquid delivery pipe 402 is connected to the external medicine tank, and the medicine connector 4 is connected to the negative pressure suction port of the Venturi jet pipe 103. The outer surface of the medicine connector 4 is equipped with a one-way valve for waterproof backflow prevention. This one-way valve can effectively prevent high-pressure wastewater from backflowing into the medicine circuit and contaminating the liquid in the medicine tank, thus ensuring the cleanliness of the medicine circuit and the stability of the dosing.

[0043] It is worth noting that the negative pressure for drug absorption is generated by the fluid dynamics principle that the flow velocity and pressure are inversely proportional in the Venturi jet tube 103. At the same time, the front-end pressure stabilizing and buffering structure can eliminate the turbulence and pressure fluctuation of the incoming water flow, so that the flow velocity of the water entering the Venturi jet tube 103 is uniform and stable, ensuring uniform dosing flow and stable dosing accuracy, and improving the water treatment effect.

[0044] Working principle and process: S1. Water Flow Stabilization and Buffering: Industrial oily wastewater enters the pressure stabilizing and buffering tank 1 through the inlet pipe 101. The water flow impacts the symmetrically arranged buffer guide plates 201. The flow-guiding arc grooves on the surface of the buffer guide plates 201 can disperse the impact force of the water flow and eliminate turbulence. Combined with the 40° to 60° opposing convergence angle, the water flow is gathered and stabilized, eliminating the shear force of the high-speed water flow and avoiding secondary breakage of emulsified oil droplets, laying the foundation for subsequent oil-water separation. At the same time, the water-proof baffle 207 blocks the shaft gap, prevents water flow cross-flow, and ensures that all water flow is fully buffered. S2. Pre-filtration and filter self-cleaning: The buffered water flows through the filter screen 301, which can intercept oil sludge and suspended impurities inside the wastewater, preventing impurities from clogging the downstream pipes and equipment. In actual operation, the water flow pressure in the pipe is not a constant value and fluctuates continuously. The dynamic change of the water flow impact pressure will continuously drive the buffer guide plate 201 to produce high-frequency small-amplitude back-and-forth deflection. During the swinging process, the buffer guide plate 201 is continuously pulled or pushed by the scissor-type linkage structure composed of four hinged rods 304 and the buffer spring 206. The mounting frame 3 makes a small reciprocating translational movement on one side of the sealing baffle 307, which in turn drives the filter screen 301 to continuously vibrate at high frequency, achieving a dynamic self-cleaning effect. This can effectively shake off the fine impurities and sludge attached to the surface of the filter screen, preventing the filter screen pores from clogging. It eliminates the need for frequent manual cleaning, reducing maintenance workload. When the water flow impact pressure increases, the buffer guide plate 201 swings backward and the displacement increases. When the water flow pressure decreases, the buffer spring 206 and the buffer guide plate 201 automatically rebound and reset, so that the filter screen 301 is always in a reciprocating dynamic vibration state, continuously completing the self-cleaning cycle. S3, Hydraulic gas generation and gas pressure storage: During the swinging process of the buffer guide plate 201, the pressure-bearing pusher 203 is pushed to slide along the inner wall of the sliding cavity 202 in a sealed manner through the adaptive transmission of the transmission link 204 and the slider 205, squeezing the air inside the cavity to form a stable low-pressure compressed gas. The two sliding cavities 202 generate gas synchronously. The gas is collected into the main gas pipe 410 through the gas guide branch pipe 409. The one-way valve locks the gas pressure and prevents backflow. S4. Passive synchronous dispensing and negative pressure suction dosing: Compressed gas enters the drive cylinder 405, and the air pressure pushes the push plate 406 to slide, squeezing the reset spring 408. Through the transmission rod 407, the L-shaped linkage plate 404 is displaced, pulling the sliding sealing plate 403 to slide, releasing the blockage of the agent passage and realizing the automatic conduction of the agent passage. The pressure-stabilized wastewater flows into the Venturi jet pipe 103 through the outlet pipe 102. When the water flows through the Venturi throat at high speed, according to the principle of fluid mechanics, the flow velocity at the throat increases sharply and the pressure drops sharply, forming a stable negative pressure suction. This negative pressure suction can stably draw the demulsifying or flocculant inside the agent tank through the agent connection pipe 4, the liquid control box 401, and the liquid delivery pipe 402. The agent and wastewater are fully mixed inside the Venturi jet pipe 103. The uniformly mixed drug-containing wastewater finally flows into the oil-water separation tank 104, and the oil-water separation and purification operation is completed through the series graphene packing. S5. Automatic Reset When Water Supply Stops and Water Flow Impact Disappears: When the water supply stops and the water flow impact disappears, the buffer spring 206 drives the pressure-bearing push block 203 and the buffer guide plate 201 to reset, and the air pressure inside the sliding cavity 202 is released; at the same time, the reset spring 408 rebounds and pushes the push plate 406, which drives the sliding sealing plate 403 to reset and block the chemical passage, automatically cutting off the dosing, solving the problems of continuous chemical absorption, chemical waste, and chemical leakage in traditional Venturi dosing devices when the machine stops. The one-way valve on the outside of the chemical connection pipe 4 can simultaneously block the backflow of wastewater and protect the chemical circuit system.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A series graphene filler oil water separation purification device, characterized in that, It includes a pressure stabilizing buffer tank (1), an inlet pipe (101), an outlet pipe (102), a Venturi jet pipe (103), and an oil-water separator (104). The water inlet pipe (101), the pressure stabilizing buffer tank (1), the water outlet pipe (102), the Venturi jet pipe (103), and the oil-water separator (104) are connected in sequence; A buffer mechanism is installed inside the pressure-stabilizing buffer box (1), and the buffer mechanism can swing displacement under the impact of water flow; The voltage stabilizing buffer box (1) is also equipped with a self-cleaning mechanism that is linked to the buffer mechanism. The self-cleaning mechanism can reciprocate and shake to clean itself as the buffer mechanism swings. The Venturi jet tube (103) is equipped with a dosing mechanism. The air inlet of the dosing mechanism is connected to the gas generation end of the buffer mechanism. Compressed gas can be used to realize the automatic opening and closing of the drug passage, so as to match the water passage opening and closing to realize synchronous passive dosing.

2. The series graphene filler oil-water separation and purification device according to claim 1, characterized in that: The buffer mechanism includes two supporting rotating shafts (2), two buffer guide plates (201), two sliding cavities (202), two pressure-bearing push blocks (203), two transmission connecting rods (204), two sliders (205) and two buffer springs (206). Two supporting shafts (2) are symmetrically fixed on both sides of the inner wall of the pressure stabilizing buffer box (1). Two buffer guide plates (201) are rotatably sleeved on the outer surface of the two supporting shafts (2). Two sliding cavities (202) are fixed on both sides of the inner wall of the pressure stabilizing buffer box (1). Two pressure-bearing push blocks (203) are slidably embedded in the inner wall of the two sliding cavities (202). The two pressure-bearing push blocks (203) are fixedly connected to the two transmission rods (204). The two transmission rods (204) are hinged on one side of the two sliders (205). Two buffer springs (206) are respectively located inside the two sliding cavities (202) for resetting the pressure-bearing push blocks (203).

3. The series graphene filler oil-water separation and purification device according to claim 2, characterized in that: Two limiting grooves (208) are opened on one side of each of the two buffer guide plates (201). The two sliders (205) are respectively slidably disposed on the inner wall of the two limiting grooves (208). Two water-proof baffles (207) are fixedly installed on the inner wall of the pressure stabilizing buffer box (1). The two water-proof baffles (207) are respectively set at the connection position between the support shaft (2) and the buffer guide plate (201) to block the shaft gap and prevent water flow. Multiple flow-guiding arc grooves are opened on one side of each of the two buffer guide plates (201).

4. The series graphene filler oil-water separation and purification device according to claim 2, characterized in that: The self-cleaning mechanism includes a mounting frame (3), a filter screen (301), two T-shaped slides (302), two T-shaped hinge seats (303), and multiple hinge rods (304). The filter screen (301) is fixedly installed on the inner side of the mounting frame (3). The two T-shaped slides (302) are opened on the rear side of the mounting frame (3). The two T-shaped hinge seats (303) are respectively slidably engaged with the inner walls of the two T-shaped slides (302). Multiple hinge rods (304) are hinged between the two T-shaped hinge seats (303) and the buffer guide plate (201).

5. The series-connected graphene-filled oil-water separation and purification device according to claim 4, characterized in that: The multiple hinged tie rods (304) are provided in total, with four rods arranged in pairs to form two sets of scissor-type linkage structures. The two sets of scissor-type linkage structures are respectively arranged symmetrically with respect to two buffer guide plates (201). The two buffer guide plates (201) are arranged symmetrically and tilted towards each other, and an initial convergence guide angle of 40° to 60° is formed between the two buffer guide plates (201) to converge and buffer the inlet water flow and reduce turbulence and stabilize the flow.

6. The series-connected graphene-filled oil-water separation and purification device according to claim 5, characterized in that: The bottom of the mounting frame (3) is provided with a rectangular positioning through hole (305). The rectangular positioning through hole (305) is located on one side of the bottom of the mounting frame (3). A positioning pin (306) is slidably inserted into the inner wall of the rectangular positioning through hole (305). A sealing baffle (307) is slidably provided on one side of the positioning pin (306). The sealing baffle (307) is detachably and sealingly installed on the outer wall of the pressure stabilizing buffer box (1).

7. The series-connected graphene-filled oil-water separation and purification device according to claim 2, characterized in that: The dosing mechanism includes a drug inlet pipe (4), a drug control box (401), a drug delivery pipe (402), a sliding sealing plate (403), an L-shaped linkage plate (404), a drive cylinder (405), a push plate (406), a transmission rod (407), a return spring (408), two gas guide branches (409), and a main gas guide pipe (410). The agent inlet (4) is connected to the side wall of the Venturi jet tube (103), the end of the agent inlet (4) is connected to the liquid control box (401), the liquid delivery pipe (402) is connected to one side of the liquid control box (401), the sliding sealing plate (403) is slidably disposed on one side of the liquid control box (401) to block the agent passage, an L-shaped linkage plate (404) is fixedly disposed on one side of the sliding sealing plate (403), and the drive cylinder (405) is fixedly disposed on the outside of the liquid control box (401).

8. The series-connected graphene-filled oil-water separation and purification device according to claim 7, characterized in that: The push plate (406) is slidably embedded in the inner wall of the drive cylinder (405), and a transmission rod (407) is fixedly arranged between the push plate (406) and the L-shaped linkage plate (404). The reset spring (408) is movably sleeved on the outer surface of the transmission rod (407).

9. The series-connected graphene-filled oil-water separation and purification device according to claim 7, characterized in that: The two ends of the return spring (408) abut against the inner wall of the drive cylinder (405) and the side of the push plate (406) respectively. The two sliding cavities (202) are respectively connected to the gas guide branch pipe (409). The two gas guide branch pipes (409) are connected to the main gas guide pipe (410). The main gas guide pipe (410) is connected to the inside of the drive cylinder (405). The gas guide branch pipe (409) is equipped with a one-way valve for preventing gas backflow.

10. A series-connected graphene-filled oil-water separation and purification device according to claim 7, characterized in that: The liquid delivery pipe (402) is connected to the external medicine tank, the medicine connector (4) is connected to the negative pressure suction port of the Venturi jet pipe (103), and a one-way valve for waterproof backflow is installed on the outer surface of the medicine connector (4).

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