Cpi coalescing oil water separation apparatus using modified coating for multilayer separation

Abstract

The application discloses CPI oil-water separation equipment for multi-layer separation by using a modified coating and relates to the technical field of water treatment equipment.The CPI oil-water separation equipment comprises a separation tank, a plurality of main inclined plates arranged in the separation tank, and a monitoring mechanism.The plurality of main inclined plates constitute an oil droplet separation assembly in the separation tank.The upper surface of the oil droplet separation assembly cavity is responsible for the capture and coalescence of oil droplets, and the lower surface is responsible for the settlement and sliding of suspended solids.This design enables oil and sludge to be separated on their respective suitable surfaces, avoids the mixing of oil and sludge, significantly improves the separation efficiency and product purity, and simultaneously, since the oil droplets are effectively captured on the upper surface, the oil droplets are prevented from entering the lower surface area with water flow and being adsorbed by sludge, thereby reducing the loss of oil, and the sludge smoothly slides on the lower surface, thereby avoiding the accumulation of sludge on the upper surface and affecting the capture and sliding of oil droplets.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment technology, specifically to a CPI coalescing oil-water separation device that utilizes a modified coating for multi-layer separation. Background Technology

[0002] In the fields of industrial production and municipal environmental protection, many industries such as oil and gas extraction, petrochemicals, machinery processing, shipping, and food processing generate a large amount of oily wastewater during production and operation. If this wastewater is not properly pretreated, it will not only cause blockage of the transmission pipeline network, overload of the downstream water treatment system, and damage to the core treatment components, but also face serious environmental compliance risks. Therefore, efficient, stable, and low-consumption pretreatment is always a crucial core node in the entire process of oily wastewater treatment. In response to the core needs of oily wastewater pretreatment, the industry has developed a variety of mature physical separation technologies and supporting equipment. Among them, the CPI coalescence oil-water separation equipment is a dedicated core pretreatment equipment developed based on gravity separation, shallow pool sedimentation theory, and coalescence separation technology. It is also the mainstream separation equipment that is currently widely used in the field of oily wastewater treatment.

[0003] However, in existing technologies, the equipment adopts a single-layer, single-stage integrated separation structure, which cannot achieve gradient targeted separation of oil droplets of different particle sizes. Multiphase media form flow field interference and phase entrainment in the same flow channel, resulting in low separation efficiency of fine oil droplets and difficulty in consistently meeting the standards for effluent water quality. Existing compensatory methods can only increase the size of the equipment, which will increase investment and land costs and exacerbate the risk of plate blockage. At the same time, corrugated plates mostly use homogeneous substrates with non-directional functional modification. Even if a few solutions use a single modified coating, they cannot adapt to the differentiated performance requirements of the entire separation process, resulting in an inherent upper limit to the oil droplet coalescence performance. These defects restrict each other and diminish one another, ultimately leading to a deterioration in the oil and sludge separation effect. Summary of the Invention

[0004] The purpose of this invention is to provide a CPI coalescing oil-water separation device that utilizes a modified coating for multi-layer separation, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a CPI coalescing oil-water separation device using modified coating for multi-layer separation, comprising a separation tank for oil-water separation treatment of oily wastewater, wherein the separation tank is provided with multiple main inclined plates and a monitoring mechanism, the multiple main inclined plates constitute an oil droplet separation component inside the separation tank, and the multiple main inclined plates are inclinedly distributed inside the separation tank and parallel to each other, the oil droplet separation component is a multi-cavity structure, each cavity has an oleophilic and hydrophobic coating on its upper surface and a hydrophilic and oleophobic coating on its lower surface, one end of the oil droplet separation component is attached to the inner wall of the separation tank, and the other end of the oil droplet separation component is equipped with an adjustment mechanism, the adjustment mechanism being used to synchronously adjust the inclination angle of the multiple main inclined plates and the spacing between the multiple main inclined plates; The monitoring mechanism is used to acquire process parameters such as the oil droplet aggregation state, oil-water separation effect, and sludge deposition state on the surface of the main inclined plate inside the separation tank in real time. The adjustment mechanism is based on the above-mentioned state parameters fed back by the monitoring mechanism. By analyzing the sliding behavior of oil droplets on the inclined plate surface, the oil layer thickness, and the amount of escaped oil, the spacing and inclination angle of the inclined plate are automatically optimized and adjusted.

[0006] Preferably, the interior of the separation chamber is fixedly connected to a rigid guide plate, a secondary inclined plate, a water collection weir plate, and three elastic guide plates. One elastic guide plate is fixedly connected at one end to the rigid guide plate and at the other end to one side of the lower part of the oil droplet separation component. Another elastic guide plate is fixedly connected at one end to the bottom wall of the separation chamber and at the other end to the other side of the lower part of the oil droplet separation component. A third elastic guide plate is fixedly connected at one end to the bottom of the secondary inclined plate and at the other end to one side of the upper part of the oil droplet separation component. The rigid guide plate, secondary inclined plate, water collection weir plate, and three elastic guide plates divide the interior of the separation chamber into an oil-water interface zone, a water distribution zone, and a main... The separation tank comprises an oil collection zone, a secondary oil collection zone, a clear water zone, and a No. 1 sludge zone. One side of the separation tank is fixedly connected to an oily wastewater inlet and a main oil outlet. The end of the main oil outlet is located within the oil-water interface zone, and the end of the oily wastewater inlet is located at the bottom of the water distribution zone. The other side of the separation tank is fixedly connected to a secondary oil outlet and a drain outlet. The end of the secondary oil outlet is located below a secondary inclined plate, and the end of the drain outlet is located inside the clear water zone. The bottom of the separation tank is equipped with a No. 1 sludge outlet, a No. 2 sludge outlet, and a No. 3 sludge outlet. The No. 2 sludge outlet is used to discharge sediment from the water distribution zone, the No. 1 sludge outlet is used to discharge sediment from the secondary oil collection zone, and the No. 3 sludge outlet is used to discharge sediment from the clear water zone.

[0007] Preferably, the monitoring mechanism includes a fiber optic reflector probe, a patch-type ultrasonic level sensor, an ultrasonic sludge interface meter, an industrial camera, and a pressure transmitter. The fiber optic reflector probe is used to monitor the rising velocity and particle size distribution of oil droplets in the main oil receiving zone in real time. By emitting and receiving reflected light signals to the oil droplets, it provides data on the movement state of the oil droplets to the regulating mechanism. The patch-type ultrasonic level sensor is used to monitor the thickness of the oil layer on the upper surface inside the cavity. By emitting and receiving ultrasonic signals that penetrate the plate wall to the main inclined plate, it calculates the cumulative thickness of the oil layer using the echo ranging principle, providing data on the oil film state to the regulating mechanism. The ultrasonic sludge interface meter is used to monitor the sludge inside the cavity. The deposition thickness is measured by emitting ultrasonic waves into the detection area and analyzing the reflected signals to determine the sludge layer height, providing the regulating mechanism with a basis for decision-making regarding the timing and angle optimization of sludge discharge. The industrial camera is used for real-time visual monitoring of escaping oil droplets in the clear water zone. By continuously capturing high-resolution images and transmitting them to the image processing system, the particle size distribution, quantity concentration, and trajectory of the escaping oil droplets are analyzed, providing the regulating mechanism with direct visual verification data of the separation effect. The pressure transmitter is used to monitor the pressure changes at the inlet and outlet of the oily wastewater in the equipment in real time. By calculating the pressure difference between the inlet and outlet, the degree of blockage of the inclined plate module is determined, providing the regulating mechanism with a trigger signal for flow channel blockage warning.

[0008] Preferably, the monitoring mechanism is electrically connected to the regulating mechanism and is equipped with a control system. The control system is used to receive real-time monitoring data from the fiber optic reflector probe, the patch ultrasonic level sensor, the ultrasonic sludge interface meter, the industrial camera, and the pressure transmitter, and to generate regulation commands based on preset control logic. The control logic includes: when the industrial camera detects that the concentration of escaping oil droplets in the clear water area exceeds the first preset threshold, or when the fiber optic reflection probe detects that the oil droplet rising speed is lower than the second preset threshold, the control system sends a command to the adjustment mechanism to increase the tilt angle of the main inclined plate. When the patch-type ultrasonic level sensor detects that the oil layer thickness on the upper surface of the main inclined plate is lower than the third preset threshold, and the industrial camera detects that the concentration of escaped oil droplets exceeds the standard, the control system sends a command to the adjustment mechanism to reduce the spacing between the main inclined plates. When the ultrasonic sludge interface instrument detects that the sludge thickness on the lower surface of the main inclined plate or in the sludge zone exceeds the fourth preset threshold, the control system sends a command to the adjustment mechanism to increase the inclination angle of the main inclined plate, and at the same time sends a command to open the sludge discharge port to the first sludge discharge port, the second sludge discharge port or the third sludge discharge port. When the pressure transmitter detects that the pressure difference between the oily wastewater inlet and outlet exceeds the fifth preset threshold, the control system sends a command to the regulating mechanism to increase the tilt angle of the main inclined plate and triggers the backwashing and sludge discharge program.

[0009] Preferably, the cross-section of the secondary inclined plate is triangular, and multiple secondary inclined plates are evenly distributed in the upper part of the clear water zone. The secondary inclined plates are used to intercept and collect the escaping oil droplets.

[0010] Preferably, the elastic guide plate consists of two fixed plates and one flexible telescopic plate, with the flexible telescopic plate located in the middle of the two fixed plates.

[0011] Preferably, the adjustment mechanism consists of a tilt adjustment component and a spacing adjustment component. The tilt adjustment component is installed on the outside of the separation box and includes a rotary table. A first servo motor is installed on the side of the rotary table to drive the rotary table. The output end of the rotary table is fixedly connected to the spacing adjustment component.

[0012] Preferably, the spacing adjustment component includes a mounting box, inside which a second servo motor is fixedly connected. The output end of the second servo motor is driven by a synchronous rotation component, which is driven by a lead screw. A movable frame is threaded onto the surface of the lead screw, and a drive plate is fixedly connected to the side of the movable frame. A limit groove is provided on the surface of the drive plate, and a movable column is slidably connected inside the limit groove. A movable rod is fixedly connected to one end of the movable column, and a fixed frame is fixedly connected to the bottom end of the movable rod. The side of the fixed frame is fixedly connected to the main inclined plate.

[0013] Preferably, the inner wall of the mounting box is fixedly connected to a first guide component and a second guide component, one end of the drive plate is slidably connected to the second guide component, the moving column is slidably connected to the first guide component, the bottom of the mounting box is provided with a through groove, the bottom end of the moving column is located inside the through groove, and elastic sealing material is installed at the gap between the moving column and the through groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the upper surface of the oil droplet separation component cavity is responsible for capturing and coalescing oil droplets, while the lower surface is responsible for the settling and sliding of suspended solids. This design allows oil and sludge to be separated on their respective suitable surfaces, avoiding oil-sludge mixing and significantly improving separation efficiency and product purity. At the same time, since oil droplets are effectively captured on the upper surface, they are prevented from entering the lower surface area with the water flow and being adsorbed by sludge, reducing oil loss. Meanwhile, sludge slides smoothly off the lower surface, preventing sludge accumulation on the upper surface from affecting the capture and sliding of oil droplets. The synergistic effect of the upper and lower surfaces makes the entire separation process more efficient and stable.

[0015] 2. In this invention, the tilt angle and spacing of multiple main inclined plates are synchronously and precisely adjusted through an adjustment mechanism. The tilt angle adjustment uses a rotary table driven by a servo motor, while the spacing adjustment uses a screw drive with a limiting groove structure to ensure that each inclined plate remains parallel and equidistant during adjustment, maintaining a uniform flow field distribution. The three elastic guide plates adopt a fixed plate plus flexible telescopic plate structure, which effectively separates each functional area through telescopic deformation during adjustment, preventing fluid short circuits. The pressure transmitter monitors the inlet and outlet pressure difference in real time, and triggers the backwashing and sludge discharge program in a timely manner when a blockage trend is detected. Combined with the sludge thickness monitoring of the ultrasonic sludge interface instrument, it effectively prevents flow channel blockage. An industrial camera visualizes and verifies the oil droplets escaping from the clear water zone, forming a multi-parameter fusion verification with the oil droplet velocity monitoring of the fiber optic reflection probe, ensuring the reliability of the adjustment effect. Through a complete monitoring-judgment-adjustment-verification closed-loop control, the need for manual intervention is significantly reduced, the stability and automation level of equipment operation are improved, the service life of the equipment is extended, and the operation and maintenance costs are reduced. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating the process of the CPI coalescing oil-water separation device using modified coatings for multi-layer separation according to the present invention. Figure 2 This is a first three-dimensional structural schematic diagram of the CPI coalescing oil-water separation device using modified coating for multi-layer separation according to the present invention; Figure 3 This is a second three-dimensional structural schematic diagram of the CPI coalescing oil-water separation device using modified coating for multi-layer separation according to the present invention; Figure 4 This is a schematic diagram of the elastic guide plate in the CPI coalescing oil-water separation device using modified coating for multi-layer separation according to the present invention; Figure 5 This is a schematic diagram of the regulating mechanism in the CPI coalescing oil-water separation device using modified coating for multi-layer separation according to the present invention; Figure 6 This is a side view of the internal structure of the CPI coalescing oil-water separation device using a modified coating for multi-layer separation according to the present invention. Figure 7 This is a schematic diagram of the internal structure of the CPI coalescing oil-water separation device using a modified coating for multi-layer separation according to the present invention. Figure 8 This is a three-dimensional structural diagram of the main inclined plate in the CPI coalescing oil-water separation device using modified coating for multi-layer separation according to the present invention; Figure 9 This is a top view of the internal structure of the mounting box in the CPI coalescing oil-water separation device for multi-layer separation using modified coatings according to the present invention. Figure 10This is a three-dimensional structural diagram of the internal structure of the mounting box in the CPI coalescing oil-water separation device that utilizes modified coatings for multi-layer separation according to the present invention.

[0017] In the diagram: 100. Separation tank; 1. Oil-water interface zone; 2. Water distribution zone; 3. Rigid guide plate; 4. Main oil collection zone; 5. Main inclined plate; 6. Secondary inclined plate; 7. Secondary oil collection zone; 8. Clear water zone; 9. Secondary oil discharge port; 10. No. 1 sludge zone; 11. No. 1 sludge discharge port; 12. No. 2 sludge discharge port; 13. Oily wastewater inlet; 14. Main oil discharge port; 15. Water collection weir plate; 16. Drainage outlet; 17. No. 3 sludge discharge port; 18. Monitoring mechanism; 181. Fiber optic reflection probe; 182. Patch-type ultrasonic level sensor. Sensors; 183. Ultrasonic sludge interface meter; 184. Industrial camera; 185. Pressure transmitter; 19. Adjustment mechanism; 191. Mounting box; 192. Rotary worktable; 193. Servo motor No. 1; 194. Servo motor No. 2; 195. Synchronous rotation assembly; 196. Lead screw; 197. Moving frame; 198. Guide assembly No. 1; 199. Guide assembly No. 2; 200. Drive plate; 201. Moving column; 202. Moving rod; 203. Fixed frame; 20. Elastic guide plate. Detailed Implementation

[0018] 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.

[0019] Example 1: Refer to Figures 1-10 As shown: A CPI coalescing oil-water separation device using modified coating for multi-layer separation includes a separation tank 100, which is used to separate oil-containing wastewater. The separation tank 100 is equipped with multiple main inclined plates 5 and a monitoring mechanism 18. The multiple main inclined plates 5 form an oil droplet separation component inside the separation tank 100, and the multiple main inclined plates 5 are inclined and parallel to each other. The oil droplet separation component has a multi-cavity structure. The upper surface of each cavity is provided with an oleophilic and hydrophobic coating, and the lower surface is provided with a hydrophilic and oleophobic coating. One end of the oil droplet separation component is attached to the inner wall of the separation tank 100, and the other end of the oil droplet separation component is equipped with an adjustment mechanism 19. The adjustment mechanism 19 is used to synchronously adjust the tilt angle of the multiple main inclined plates 5 and the spacing between the multiple main inclined plates 5. The monitoring mechanism 18 is used to acquire process parameters such as the oil droplet aggregation state, oil-water separation effect, and sludge deposition state on the surface of the main inclined plate 5 inside the separation box 100 in real time. The adjustment mechanism 19 is based on the above-mentioned state parameters fed back by the monitoring mechanism 18. By analyzing the sliding behavior of oil droplets on the surface of the inclined plate, the oil layer thickness, and the amount of escaped oil, the spacing and inclination angle of the inclined plate are automatically optimized and adjusted.

[0020] In this invention, oily wastewater enters the separation tank 100 through the oily wastewater inlet 13 and first flows into the oil droplet separation component, which is composed of multiple main inclined plates 5 arranged in parallel and inclined manner, forming a multi-cavity structure. Due to the parallel and inclined arrangement of the multiple main inclined plates 5, the oily wastewater forms a uniform thin laminar flow between the plates, creating favorable hydrodynamic conditions for oil-water separation. When the oily wastewater flows over the surface of the main inclined plates 5, the functional zoning design of the modified coating begins to take effect.

[0021] An oleophilic and hydrophobic coating is applied to the upper surface of the cavity formed by the main inclined plate 5. This coating has a strong affinity for oil droplets while repelling the aqueous phase. When dispersed oil droplets in oily wastewater come into contact with the upper surface of the cavity, the oil droplets are quickly captured and adhered to by the oleophilic surface. The captured oil droplets gradually converge on the upper surface of the cavity and slide upward along the inclined plate surface under the action of buoyancy. During the sliding process, small oil droplets collide with each other and aggregate to grow. When the oil droplets grow to a certain size, their buoyancy is sufficient to overcome the drag force and viscosity of the water flow. The oil droplets detach from the inclined plate surface, quickly float to the liquid surface, enter the main oil collection zone 4, and are finally discharged from the equipment through the main oil discharge port 14, achieving the initial separation of the oil phase.

[0022] A hydrophilic-oleophobic coating is applied to the lower surface of the cavity. This coating has an affinity for the aqueous phase while repelling oil droplets. This property effectively prevents oil droplets from adhering to the lower surface and avoids the migration of the oil phase into the sludge zone. Simultaneously, suspended solids sludge carried in the oily wastewater settles to the lower surface of the cavity under gravity. Because the main inclined plate 5 is tilted, the sludge settling on the lower surface of the cavity slides down the lower surface under the influence of gravity, eventually entering the sludge zone and being periodically discharged from the equipment through the sludge discharge port. The presence of the hydrophilic-oleophobic coating not only prevents oil droplet contamination of the lower surface but also, due to its smooth surface properties, facilitates the smooth sliding of sludge, preventing sludge accumulation.

[0023] Example 2: Refer to Figures 2-10As shown: The interior of the separator 100 is fixedly connected to a rigid guide plate 3, a secondary inclined plate 6, a water collection weir plate 15, and three elastic guide plates 20. One elastic guide plate 20 is fixedly connected at one end to the rigid guide plate 3 and at the other end to the lower side of the oil droplet separation component. Another elastic guide plate 20 is fixedly connected at one end to the bottom wall of the separator 100 and at the other end to the lower side of the oil droplet separation component. A third elastic guide plate 20 is fixedly connected at one end to the bottom of the secondary inclined plate 6 and at the other end to the upper side of the oil droplet separation component. The rigid guide plate 3, secondary inclined plate 6, water collection weir plate 15, and three elastic guide plates 20 divide the interior of the separator 100 into an oil-water interface zone 1, a water distribution zone 2, and a main collection zone 3. The separation tank 100 is divided into an oil zone 4, a secondary oil collection zone 7, a clear water zone 8, and a No. 1 sludge zone 10. One side of the separation tank 100 is fixedly connected to an oily wastewater inlet 13 and a main oil outlet 14. The end of the main oil outlet 14 is located in the oil-water interface zone 1, and the end of the oily wastewater inlet 13 is located at the bottom of the water distribution zone 2. The other side of the separation tank 100 is fixedly connected to a secondary oil outlet 9 and a drain outlet 16. The end of the secondary oil outlet 9 is located below the secondary inclined plate 6, and the end of the drain outlet 16 is located inside the clear water zone 8. The bottom of the separation tank 100 is respectively equipped with a No. 1 sludge outlet 11, a No. 2 sludge outlet 12, and a No. 3 sludge outlet 17. The No. 2 sludge outlet 12 is used to discharge the sediment in the water distribution zone 2, the No. 1 sludge outlet 11 is used to discharge the sediment in the secondary oil collection zone 7, and the No. 3 sludge outlet 17 is used to discharge the sediment inside the clear water zone 8. The monitoring mechanism 18 includes a fiber optic reflector 181, a patch-type ultrasonic level sensor 182, an ultrasonic sludge interface meter 183, an industrial camera 184, and a pressure transmitter 185. The fiber optic reflector 181 is used to monitor the rising velocity and particle size distribution of oil droplets in the main oil receiving zone 4 in real time. By emitting and receiving reflected light signals to the oil droplets, it provides data on the movement state of the oil droplets to the regulating mechanism 19. The patch-type ultrasonic level sensor 182 is used to monitor the thickness of the oil layer on the upper surface inside the cavity. By emitting and receiving ultrasonic signals that penetrate the plate wall to the main inclined plate 5, it calculates the cumulative thickness of the oil layer using the echo ranging principle, providing data on the oil film state to the regulating mechanism 19. The ultrasonic sludge interface meter 183 is used to monitor the interior of the cavity. The sludge deposition thickness is measured by emitting ultrasonic waves into the detection area and analyzing the reflected signals to measure the sludge layer height, providing the adjustment mechanism 19 with a decision basis for optimizing the timing and tilt angle of sludge discharge. The industrial camera 184 is used for real-time visual monitoring of escaped oil droplets in the clear water zone 8. By continuously capturing high-resolution images and transmitting them to the image processing system, the particle size distribution, number concentration, and trajectory of the escaped oil droplets are analyzed, providing the adjustment mechanism 19 with direct visual verification data of the separation effect. The pressure transmitter 185 is used to monitor the pressure changes at the oily wastewater inlet 13 and outlet 16 of the equipment in real time. By calculating the pressure difference between the inlet and outlet, the degree of blockage of the inclined plate module is determined, providing the adjustment mechanism 19 with a trigger signal for flow channel blockage warning. The monitoring mechanism 18 is electrically connected to the regulating mechanism 19 and is equipped with a control system. The control system is used to receive real-time monitoring data from the fiber optic reflector probe 181, the patch ultrasonic liquid level sensor 182, the ultrasonic sludge interface instrument 183, the industrial camera 184, and the pressure transmitter 185, and to generate regulation commands based on preset control logic. The control logic includes: when the industrial camera 184 detects that the concentration of escaping oil droplets in the clear water zone 8 exceeds the first preset threshold, or when the fiber optic reflection probe 181 detects that the oil droplet rising speed is lower than the second preset threshold, the control system sends a command to the adjustment mechanism 19 to increase the tilt angle of the main inclined plate 5. When the patch-type ultrasonic liquid level sensor 182 detects that the oil layer thickness on the upper surface of the main inclined plate 5 is lower than the third preset threshold, and the industrial camera 184 detects that the concentration of escaped oil droplets exceeds the standard, the control system sends a command to the adjustment mechanism 19 to reduce the spacing of the main inclined plate 5. When the ultrasonic sludge interface instrument 183 detects that the sludge thickness on the lower surface of the main inclined plate 5 or in the sludge zone exceeds the fourth preset threshold, the control system sends a command to the adjustment mechanism 19 to increase the inclination angle of the main inclined plate 5, and at the same time sends a command to open the sludge discharge port 11, the second sludge discharge port 12 or the third sludge discharge port 17. When the pressure transmitter 185 detects that the pressure difference between the oily wastewater inlet 13 and the outlet 16 exceeds the fifth preset threshold, the control system sends a command to the regulating mechanism 19 to increase the tilt angle of the main inclined plate 5 and triggers the backwashing and sludge discharge program.

[0024] In this invention, oily wastewater (such as...) Figure 7 (As indicated by the dashed arrow) The oily wastewater enters the separation tank 100 through the oily wastewater inlet 13, the end of which is located at the bottom of the distribution zone 2. The wastewater first enters the distribution zone 2, which serves as a preliminary buffer and distribution space, reducing the influent flow velocity and ensuring uniform distribution to avoid impacting and disturbing the subsequent separation zone. A second sludge discharge port 12 is provided at the bottom of the distribution zone 2 to discharge the heavier sediments that have settled in this area.

[0025] After being evenly distributed in the water distribution zone 2, the wastewater enters the oil droplet separation assembly under the guidance of the rigid guide plate 3. The rigid guide plate 3 is fixedly connected to the inside of the separation tank 100, and one side of it is connected to the lower side of the oil droplet separation assembly through the elastic guide plate 20, forming a sealed and flexible channel that can expand and contract with the movement of the adjustment mechanism 19. This design of the elastic guide plate 20 ensures that the oil droplet separation assembly maintains a sealed connection with the fixed structures such as the rigid guide plate 3, the bottom wall of the separation tank 100, and the secondary inclined plate 6 when adjusting the tilt angle and spacing, preventing fluid short circuits.

[0026] After the wastewater enters the oil droplet separation assembly composed of multiple main inclined plates 5, it flows within the parallel, inclined channels between the plates. As in Example 1, the modified coatings on the upper and lower surfaces of the main inclined plates 5 play a separation role: the oleophilic and hydrophobic coating on the upper surface captures oil droplets, promoting the separation of oil droplets (such as...). Figure 7 (As indicated by the solid arrow) The oil phase converges, slides, and floats to the main oil collection zone 4; the hydrophilic and oleophobic coating on the lower surface promotes the settling of suspended solids and their sliding to the No. 1 sludge zone 10. The separated oil phase accumulates in the main oil collection zone 4 and is discharged from the equipment through the main oil outlet 14.

[0027] The aqueous phase separated in region 5 of the main inclined plate (e.g.) Figure 7 As indicated by the hollow arrow, tiny oil droplets that fail to separate completely enter the secondary oil collection zone 7. These droplets continue flowing forward with the water and enter the secondary oil collection zone 7. The secondary oil collection zone 7 is located on the outlet side of the oil droplet separation assembly, and a secondary inclined plate 6 is positioned above it. The cross-section of the secondary inclined plate 6 is triangular, and multiple secondary inclined plates 6 are evenly distributed in the upper part of the clear water zone 8. When water containing escaped oil droplets flows through the secondary inclined plate 6, the secondary inclined plate 6 separates the oil droplets (such as...)... Figure 7 The solid arrow (indicated by the solid line) acts as an interceptor and agglomerator, achieving secondary separation of oil droplets. Oil droplets captured by the secondary inclined plate 6 float to the top of the secondary oil collection zone 7 and are discharged from the equipment through the secondary oil outlet 9. This multi-stage separation design further reduces the oil content in the effluent and improves the overall separation efficiency.

[0028] After secondary separation by the secondary inclined plate 6, the aqueous phase enters the clear water zone 8. The clear water zone 8 is separated from the secondary oil collection zone 7 by the water collection weir plate 15 to ensure a stable water flow. The purified clear water is discharged from the equipment through the drain outlet 16. A third sludge discharge outlet 17 is provided at the bottom of the clear water zone 8 to discharge any small amount of fine particulate sediment that may settle in this area.

[0029] During the separation process described above, all sensors in monitoring unit 18 operate continuously online, collecting key process parameters in real time: An optical fiber reflection probe 181 is installed within the main oil collection zone 4, with its tip extending into the aqueous phase region below the oil-water interface. When an oil droplet rising from the main inclined plate 5 passes the probe tip, the optical signal emitted by the probe is reflected at the oil-water interface. The reflected optical signal is received and analyzed. By analyzing the waveform characteristics of the reflected signal, the rising velocity and particle size distribution of the oil droplet can be accurately calculated. These data directly reflect the separation effect of the main inclined plate 5: if the oil droplet rising velocity meets the theoretical value and the particle size distribution is reasonable, it indicates normal separation; if the velocity is too low or the particle size is too small, it indicates insufficient oil droplet aggregation.

[0030] A patch-type ultrasonic level sensor 182 is attached to the non-flowing surface of the back of the main inclined plate 5. It emits ultrasonic waves into the main inclined plate 5 and receives the reflected signals that penetrate the plate wall. Using the echo ranging principle, it calculates the cumulative oil layer thickness on the upper surface of the main inclined plate 5 in real time. Because ultrasonic waves propagate at different speeds in different media such as the plate wall, water layer, and oil layer, and are reflected at different interfaces, the oil layer thickness can be accurately measured by analyzing the echo time and signal intensity. Oil layer thickness is a key indicator for judging oil droplet capture efficiency: an excessively thin oil layer indicates insufficient oil droplet adhesion, while an excessively thick oil layer may affect the flow area or cause the oil film to be sheared by the water flow.

[0031] The ultrasonic sludge interface meter 183 is installed on the side wall or bottom of the separation tank 100, tilted upwards and aligned with the lower surface of the main inclined plate 5 and the first sludge zone 10. By emitting ultrasonic waves and analyzing the reflected signals at different media interfaces (water-sludge, sludge-plate wall), the sludge deposition thickness is measured in real time. As the sludge layer thickness increases, the arrival time of the reflected signal changes accordingly, thus accurately calculating the sludge layer height. These data are used to determine whether sludge discharge is smooth: if the sludge thickness continues to increase, it indicates poor sludge discharge or insufficient inclination angle of the inclined plate.

[0032] An industrial camera 184 is mounted above the clear water zone 8, continuously capturing images of the fluid within the zone through a viewing window equipped with an automatic cleaning function. The captured high-resolution images are transmitted to an image processing system, where image recognition algorithms analyze the particle size distribution, concentration, and trajectory of escaping oil droplets. The industrial camera 184 provides direct visual verification of the separation effect, intuitively reflecting the overall separation efficiency.

[0033] Pressure transmitters 185 are installed at the oily wastewater inlet 13 and outlet 16 to monitor pressure changes at both points in real time and determine the degree of blockage in the inclined plate module by calculating the pressure difference between the inlet and outlet. When the flow channel narrows due to sludge accumulation between the main inclined plates 5, fluid resistance increases, and the pressure difference between the inlet and outlet rises accordingly. The data from pressure transmitter 185 provides early warning of flow channel blockage to the regulating mechanism 19.

[0034] The monitoring mechanism 18 and the regulating mechanism 19 are electrically connected and jointly equipped with a control system. The control system continuously receives real-time monitoring data from the five sensors mentioned above, analyzes and judges the data based on preset control logic, and automatically generates and executes regulation commands. The specific control logic is as follows: When the industrial camera 184 detects that the concentration of escaping oil droplets in the clear water zone 8 exceeds the first preset threshold, it indicates that too many oil droplets have failed to be effectively captured by the main inclined plate 5 and the secondary inclined plate 6, resulting in a decrease in separation efficiency. The control system first analyzes the cause: if the oil droplet rising speed monitored by the fiber optic reflection probe 181 is simultaneously detected to be lower than the second preset threshold, it indicates that the oil droplets slide slowly on the inclined plate surface and do not coalesce sufficiently. At this time, the control system determines that the insufficient inclination angle of the inclined plate is causing difficulty in oil droplet desorption, and then sends a command to the adjustment mechanism 19 to increase the inclination angle of the main inclined plate 5, thereby accelerating the sliding and rising of oil droplets by increasing the component of gravity.

[0035] When the patch-type ultrasonic level sensor 182 detects that the oil layer thickness on the upper surface of the main inclined plate 5 is lower than the third preset threshold, and the industrial camera 184 simultaneously detects that the concentration of escaped oil droplets exceeds the standard, the control system determines that the oil droplets are not being captured sufficiently on the inclined plate surface. An excessively thin oil layer indicates that the oil droplets have failed to effectively adhere to the oleophilic coating surface, possibly due to excessively large plate spacing causing the oil droplets to float too far and fail to contact the plate surface in time. At this point, the control system sends a command to the adjustment mechanism 19 to reduce the spacing of the main inclined plates 5. By shortening the vertical floating distance of the oil droplets, the probability of collision between the oil droplets and the plate surface is increased, thereby improving the capture efficiency.

[0036] When the ultrasonic sludge interface instrument 183 detects that the sludge thickness on the lower surface of the main inclined plate 5 or the first sludge zone 10 exceeds the fourth preset threshold, it indicates that the sludge has accumulated on the lower surface of the inclined plate and has failed to slide into the sludge zone in time. Sludge accumulation will lead to a reduction in the effective flow area and an increase in flow velocity, which may wash away the captured oil droplets and increase the risk of flow channel blockage. At this time, the control system sends a command to the regulating mechanism 19 to increase the inclination angle of the main inclined plate 5, thereby increasing the gravity component to promote sludge sliding; on the other hand, according to the specific location of sludge accumulation, it sends a command to open the sludge discharge port 11, the second sludge discharge port 12, or the third sludge discharge port 17 to discharge the accumulated sludge in time.

[0037] When the pressure transmitter 185 detects that the pressure difference between the oily wastewater inlet 13 and the outlet 16 exceeds the fifth preset threshold, it indicates that there is significant blockage in the internal flow channel of the inclined plate module. The blockage may be caused by the accumulation of oily sludge, biological slime, or inorganic scale. At this time, the control system sends a command to the regulating mechanism 19 to increase the inclination angle of the main inclined plate 5, thereby enhancing the self-cleaning ability of the sludge; at the same time, it triggers the backwashing and sludge discharge program, which forcibly removes the blockage between the inclined plates and restores the flow channel to smooth flow by intermittently increasing the sludge discharge frequency or using a pulsed sludge discharge method.

[0038] When the adjustment mechanism 19 changes the inclination angle or spacing of the main inclined plate 5, the position and orientation of the oil droplet separation component change accordingly. The elastic guide plate 20 connecting the rigid guide plate 3 to one side of the lower part of the oil droplet separation component, the elastic guide plate 20 connecting the bottom wall of the separation box 100 to the other side of the lower part of the oil droplet separation component, and the elastic guide plate 20 connecting the bottom of the secondary inclined plate 6 to one side of the upper part of the oil droplet separation component, all adapt to the displacement of the oil droplet separation component through the deformation of their flexible telescopic plates, maintaining a sealed connection with the fixed structure at all times. This design ensures that even during dynamic adjustment, the separation between the various functional areas inside the separation box 100, such as the water distribution area 2, the main oil collection area 4, the secondary oil collection area 7, and the clear water area 8, remains effective, preventing fluid short-circuiting and ensuring the stability of the separation efficiency.

[0039] Example 3: Refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown: The cross-section of the secondary inclined plate 6 is triangular. Multiple secondary inclined plates 6 are evenly distributed in the upper part of the clear water zone 8. The secondary inclined plates 6 are used to intercept and collect the escaping oil droplets. The elastic guide plate 20 consists of two fixed plates and one flexible telescopic plate. The flexible telescopic plate is located in the middle of the two fixed plates. The adjustment mechanism 19 consists of a tilt adjustment component and a spacing adjustment component. The tilt adjustment component is installed on the outside of the separation box 100 and includes a rotary table 192. A first servo motor 193 is installed on the side of the rotary table 192 to drive the rotary table 192. The output end of the rotary table 192 is fixedly connected to the spacing adjustment component. The spacing adjustment component includes a mounting box 191. A second servo motor 194 is fixedly connected inside the mounting box 191. The output end of the second servo motor 194 is driven by a synchronous rotation component 195. The synchronous rotation component 195 is driven by a lead screw 196. A movable frame 197 is threaded onto the surface of the lead screw 196. A drive plate 200 is fixedly connected to the side of the 7th section. A limit groove is provided on the surface of the drive plate 200. A movable column 201 is slidably connected inside the limit groove. A movable rod 202 is fixedly connected to one end of the movable column 201. A fixed frame 203 is fixedly connected to the bottom end of the movable rod 202. The side of the fixed frame 203 is fixedly connected to the main inclined plate 5. A first guide assembly 198 and a second guide assembly 199 are fixedly connected to the inner wall of the mounting box 191 respectively. One end of the drive plate 200 is slidably connected to the second guide assembly 199. The movable column 201 is slidably connected to the first guide assembly 198. A through groove is provided at the bottom of the mounting box 191. The bottom end of the movable column 201 is located inside the through groove, and an elastic sealing material is installed at the gap between the movable column 201 and the through groove.

[0040] In this invention, the tilt adjustment component is installed on the outside of the separation box 100, including a rotary table 192 and a servo motor 193. The rotary table 192 is a mechanical device that can precisely control the rotation angle, and its output end is fixedly connected to the spacing adjustment component.

[0041] When the control system issues a tilt angle adjustment command, servo motor 193 starts, driving the rotary table 192. The rotary table 192 rotates precisely to the target angle as required by the command, causing the spacing adjustment assembly fixedly connected to it to rotate as a whole. Since the spacing adjustment assembly is connected to the main inclined plate 5, the tilt angle of the main inclined plate 5 changes synchronously. This design ensures that the tilt angle adjustment of all main inclined plates 5 is highly consistent, ensuring that the plates remain parallel after adjustment and maintaining a uniform flow field distribution.

[0042] The pitch adjustment assembly includes a mounting box 191, inside which a second servo motor 194 is fixedly connected. When the control system issues a pitch adjustment command, the second servo motor 194 starts, and its output drives the synchronous rotation assembly 195. The synchronous rotation assembly 195 transmits the rotational motion of the motor to the lead screw 196, causing the lead screw 196 to rotate.

[0043] A movable frame 197 is threaded onto the surface of the lead screw 196. When the lead screw 196 rotates, the movable frame 197 moves axially along the lead screw 196. A drive plate 200 is fixedly connected to the side of the movable frame 197. The surface of the drive plate 200 is provided with limit grooves, and multiple movable columns 201 are slidably connected in each limit groove. A movable rod 202 is fixedly connected to one end of each movable column 201, and a fixed frame 203 is fixedly connected to the bottom end of the movable rod 202. The side of the fixed frame 203 is fixedly connected to the main inclined plate 5.

[0044] When the drive plate 200 moves with the movable frame 197, the limiting groove synchronously pushes each movable column 201 to move. Due to the geometric design of the limiting groove, the moving distance of each movable column 201 is proportionally distributed, enabling the main inclined plates 5 connected to it to achieve synchronous adjustment with equal spacing. For example, when it is necessary to reduce the plate spacing, the drive plate 200 moves in a certain direction, and each movable column 201 moves closer to each other under the guidance of the limiting groove. Through the moving rod 202 and the fixed frame 203, the main inclined plates 5 are driven to move closer synchronously, achieving a uniform reduction in spacing; conversely, when it is necessary to increase the plate spacing, the drive plate 200 moves in the opposite direction, and each main inclined plate 5 moves away synchronously.

[0045] To ensure the smoothness and accuracy of the adjustment process, a first guide assembly 198 and a second guide assembly 199 are fixedly connected to the inner wall of the mounting box 191. One end of the drive plate 200 is slidably connected to the second guide assembly 199, so that the drive plate 200 maintains linear motion during movement and prevents deflection; the moving column 201 is slidably connected to the first guide assembly 198, so that the moving column 201 moves smoothly under the guidance of the limiting groove and avoids jamming.

[0046] The bottom of the mounting box 191 is provided with a through groove, through which the bottom end of the moving column 201 extends into the separation box 100 and connects with the moving rod 202. An elastic sealing material is installed at the gap between the moving column 201 and the through groove. This sealing material maintains an effective seal during the reciprocating motion of the moving column 201, preventing leakage of oily wastewater from the separation box 100 and ensuring the airtightness of the equipment during dynamic adjustment.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A CPI coalescing oil-water separation device using modified coating for multi-layer separation, comprising a separation tank (100) for oil-water separation treatment of oily wastewater, wherein the separation tank (100) is provided with multiple main inclined plates (5) inside, characterized in that: It also includes a monitoring mechanism (18), and multiple main inclined plates (5) form an oil droplet separation assembly inside the separation box (100). The multiple main inclined plates (5) are inclinedly distributed inside the separation box (100), and the multiple main inclined plates (5) are parallel to each other. The oil droplet separation assembly is a multi-cavity structure. The upper surface of each cavity is provided with an oleophilic and hydrophobic coating, and the lower surface is provided with a hydrophilic and oleophobic coating. One end of the oil droplet separation assembly is attached to the inner wall of the separation box (100), and the other end of the oil droplet separation assembly is equipped with an adjustment mechanism (19). The adjustment mechanism (19) is used to synchronously adjust the tilt angle of the multiple main inclined plates (5) and synchronously adjust the spacing between the multiple main inclined plates (5). The monitoring mechanism (18) is used to obtain the process parameters of oil droplet aggregation state, oil-water separation effect and sludge deposition state on the surface of the main inclined plate (5) inside the separation tank (100) in real time online; the adjustment mechanism (19) is based on the above-mentioned state parameters fed back by the monitoring mechanism (18). By analyzing the sliding behavior of oil droplets on the surface of the inclined plate, the oil layer thickness and the amount of escaped oil, the spacing and tilt angle of the inclined plate are automatically optimized and adjusted.

2. The CPI coalescing oil-water separation device using a modified coating for multi-layer separation according to claim 1, characterized in that: The separation box (100) is internally fixedly connected to a rigid guide plate (3), a secondary inclined plate (6), a water collection weir plate (15), and three elastic guide plates (20). One end of one elastic guide plate (20) is fixedly connected to the rigid guide plate (3), and the other end is fixedly connected to one side of the lower part of the oil droplet separation component. One end of another elastic guide plate (20) is fixedly connected to the bottom wall of the separation box (100), and the other end of the elastic guide plate (20) is fixedly connected to the oil droplet separation component. A rigid guide plate (20) is fixedly connected to the bottom of the auxiliary inclined plate (6) at one end, and the other end of the elastic guide plate (20) is fixedly connected to the upper side of the oil droplet separation component. The rigid guide plate (3), the auxiliary inclined plate (6), the water collection weir plate (15) and the three elastic guide plates (20) divide the interior of the separation box (100) into an oil-water interface zone (1), a water distribution zone (2), a main oil collection zone (4), an auxiliary oil collection zone (7), and a clear water collection zone (8). The separation tank (100) is divided into water zone (8) and sludge zone (10). One side of the separation tank (100) is fixedly connected to an oily wastewater inlet (13) and a main oil outlet (14). The end of the main oil outlet (14) is located within the oil-water interface zone (1). The end of the oily wastewater inlet (13) is located at the bottom of the water distribution zone (2). The other side of the separation tank (100) is fixedly connected to a secondary oil outlet (9) and a drain outlet (16). The end of the secondary oil outlet (9) is located at the bottom of the secondary inclined plate (…). 6) Below, the end of the drain outlet (16) is located inside the clear water zone (8). The bottom of the separation box (100) is equipped with a first sludge discharge port (11), a second sludge discharge port (12) and a third sludge discharge port (17). The second sludge discharge port (12) is used to discharge the sediment in the water distribution zone (2). The first sludge discharge port (11) is used to discharge the sediment in the secondary oil collection zone (7). The third sludge discharge port (17) is used to discharge the sediment inside the clear water zone (8).

3. The CPI coalescing oil-water separation device using modified coating for multi-layer separation according to claim 1, characterized in that: The monitoring mechanism (18) includes a fiber optic reflector (181), a patch-type ultrasonic level sensor (182), an ultrasonic sludge interface meter (183), an industrial camera (184), and a pressure transmitter (185). The fiber optic reflector (181) is used to monitor the rising velocity and particle size distribution of oil droplets in the main oil receiving area (4) in real time. By emitting and receiving reflected light signals to the oil droplets, it provides data on the movement state of the oil droplets to the regulating mechanism (19). The patch-type ultrasonic level sensor (182) is used to monitor the thickness of the oil layer on the upper surface inside the cavity. By emitting and receiving ultrasonic signals that penetrate the plate wall to the main inclined plate (5), it calculates the cumulative thickness of the oil layer using the echo ranging principle, providing data on the oil film state to the regulating mechanism (19). The ultrasonic sludge interface meter (183) is used to monitor the rising velocity and particle size distribution of oil droplets in the main oil receiving area (4) in real time. By emitting and receiving ultrasonic signals that penetrate the plate wall to the main inclined plate (5), it calculates the cumulative thickness of the oil layer using the echo ranging principle, providing data on the oil film state to the regulating mechanism (19). The sludge deposition thickness inside the monitoring chamber is measured by emitting ultrasonic waves into the detection area and analyzing the reflected signals to measure the sludge layer height, providing the adjustment mechanism (19) with a decision basis for optimizing the timing and tilt angle of sludge discharge. The industrial camera (184) is used for real-time visual monitoring of escaped oil droplets in the clear water zone (8). By continuously capturing high-resolution images and transmitting them to the image processing system, the particle size distribution, quantity concentration and movement trajectory of the escaped oil droplets are analyzed, providing the adjustment mechanism (19) with direct visual verification data of the separation effect. The pressure transmitter (185) is used to monitor the pressure changes of the oily wastewater inlet (13) and outlet (16) of the equipment in real time. By calculating the pressure difference between the inlet and outlet, the degree of blockage of the inclined plate module is judged, providing the adjustment mechanism (19) with a trigger signal for flow channel blockage warning.

4. The CPI coalescing oil-water separation device using modified coating for multi-layer separation according to claim 1, characterized in that: The monitoring mechanism (18) is electrically connected to the regulating mechanism (19) and is equipped with a control system. The control system is used to receive real-time monitoring data from the fiber optic reflector probe (181), the patch ultrasonic liquid level sensor (182), the ultrasonic sludge interface instrument (183), the industrial camera (184), and the pressure transmitter (185), and to generate regulation commands based on preset control logic. The control logic includes: when the industrial camera (184) detects that the concentration of escaping oil droplets in the clear water area (8) exceeds the first preset threshold, or when the fiber optic reflection probe (181) detects that the oil droplet floating speed is lower than the second preset threshold, the control system sends an instruction to the adjustment mechanism (19) to increase the tilt angle of the main inclined plate (5); When the patch-type ultrasonic liquid level sensor (182) detects that the oil layer thickness on the upper surface of the main inclined plate (5) is lower than the third preset threshold, and the industrial camera (184) detects that the concentration of escaped oil droplets exceeds the standard, the control system sends a command to the adjustment mechanism (19) to reduce the spacing of the main inclined plate (5); When the ultrasonic sludge interface instrument (183) detects that the sludge thickness on the lower surface of the main inclined plate (5) or in the sludge zone exceeds the fourth preset threshold, the control system sends an instruction to the adjustment mechanism (19) to increase the tilt angle of the main inclined plate (5), and at the same time sends an instruction to open the sludge discharge port (11), the second sludge discharge port (12) or the third sludge discharge port (17). When the pressure transmitter (185) detects that the pressure difference between the oily wastewater inlet (13) and the outlet (16) exceeds the fifth preset threshold, the control system sends an instruction to the regulating mechanism (19) to increase the tilt angle of the main inclined plate (5) and triggers the backwashing and sludge discharge program.

5. The CPI coalescing oil-water separation device using modified coating for multi-layer separation according to claim 2, characterized in that: The cross-section of the sub-inclined plate (6) is triangular, and multiple sub-inclined plates (6) are evenly distributed on the upper part of the clear water zone (8). The sub-inclined plates (6) are used to intercept and collect the escaping oil droplets.

6. The CPI coalescing oil-water separation device using modified coating for multi-layer separation according to claim 2, characterized in that: The elastic guide plate (20) consists of two fixed plates and one flexible telescopic plate, with the flexible telescopic plate located in the middle of the two fixed plates.

7. The CPI coalescing oil-water separation device using modified coating for multi-layer separation according to claim 1, characterized in that: The adjustment mechanism (19) consists of a tilt adjustment component and a spacing adjustment component. The tilt adjustment component is installed on the outside of the separation box (100) and includes a rotary table (192). A servo motor (193) is installed on the side of the rotary table (192). The servo motor (193) is used to drive the rotary table (192) to run. The output end of the rotary table (192) is fixedly connected to the spacing adjustment component.

8. The CPI coalescing oil-water separation device using a modified coating for multi-layer separation according to claim 7, characterized in that: The spacing adjustment assembly includes a mounting box (191), a second servo motor (194) is fixedly connected inside the mounting box (191), a synchronous rotation assembly (195) is driven to the output end of the second servo motor (194), a lead screw (196) is driven to the synchronous rotation assembly (195), a movable frame (197) is threaded to the surface of the lead screw (196), a drive plate (200) is fixedly connected to the side of the movable frame (197), a limit groove is provided on the surface of the drive plate (200), a movable column (201) is slidably connected inside the limit groove, a movable rod (202) is fixedly connected to one end of the movable column (201), a fixed frame (203) is fixedly connected to the bottom end of the movable rod (202), and the side of the fixed frame (203) is fixedly connected to the main inclined plate (5).

9. The CPI coalescing oil-water separation device using a modified coating for multi-layer separation according to claim 8, characterized in that: The inner wall of the mounting box (191) is fixedly connected to a first guide assembly (198) and a second guide assembly (199). One end of the drive plate (200) is slidably connected to the second guide assembly (199). The moving column (201) is slidably connected to the first guide assembly (198). The bottom of the mounting box (191) is provided with a through groove. The bottom end of the moving column (201) is located inside the through groove, and elastic sealing material is installed at the gap between the moving column (201) and the through groove.

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