Porous baffling separation treatment process and device for tail oil of waste mineral oil

Abstract

The invention discloses a porous baffling separation treatment process and device for waste mineral oil and tail oil, and belongs to the technical field of separation devices.The porous baffling separation treatment device comprises a tower body, the top of the tower body is communicated with a gas phase outlet, the middle-upper portion of the tower body is communicated with a liquid phase feeding port, the lower portion of the tower body is communicated with a gas phase inlet, and the bottom of the tower body is communicated with a liquid phase discharging port; the reaction tower is characterized in that a plurality of baffle plates are connected inside the tower body and are positioned between the liquid phase feed port and the gas phase inlet. According to the invention, a plurality of groups of baffle plates which are alternately arranged in a staggered manner are arranged in the tower body, the chord edge of the quasi-circular disc body is matched with the inner wall of the tower body to form a zigzag upward gas phase channel, and the gas rising hole and the flow guide hole which are exclusively formed in the disc body are matched, so that the circulation path of a gas phase in the tower can be obviously prolonged; the gas phase and the tail oil of the waste mineral oil form more sufficient countercurrent contact, meanwhile, gas-liquid two-phase split-flow circulation is achieved, flow interference is reduced, and gas-liquid mass transfer efficiency and separation uniformity can be improved.

Description

Technical Field

[0001] This invention belongs to the field of separation device technology, and particularly relates to a porous baffle separation process and device for waste mineral oil tail oil. Background Technology

[0002] Waste mineral oil tailings treatment is a crucial step in the resource utilization of hazardous waste, typically employing gas-liquid contact separation devices to separate light components, upgrade oil quality, and remove impurities. Baffles, as the core internal components of such devices, primarily function to provide contact space between the gas and liquid phases, extending the contact path and improving mass transfer separation efficiency. However, when treating waste mineral oil tailings with high viscosity and poor flowability, existing baffle structures generally suffer from problems such as significant gas-liquid flow interference, poor liquid layer stability, and low separation efficiency, making it difficult to meet the requirements for continuous and stable treatment.

[0003] To improve gas-liquid contact, existing technologies often employ staggered flat or arc-shaped baffle structures. These baffles create zigzag airflow channels between the plates, extending the gas phase residence path. However, these structures lack independent gas-phase riser holes and liquid-phase guide holes, making it easy for the gas and liquid phases to mix and interfere in the same area. Furthermore, the lack of weirs, liquid distribution troughs, and other structures makes it difficult to form a uniform and stable liquid layer, and the wall flow cannot be effectively recovered and utilized. While some structures possess basic flow guidance functions, they lack liquid seal structures, resulting in problems such as gas phase cross-flow and liquid phase back-mixing. Moreover, the absence of integrated temperature control structures makes it impossible to meet the stable temperature requirements of waste mineral oil tailings. Overall, there is still significant room for improvement in treatment efficiency and operational reliability. Summary of the Invention

[0004] The purpose of this invention is to propose a porous baffle separation process and apparatus for waste mineral oil tailings, in order to solve the problem in traditional technology where the baffle structure does not have independent gas phase rise holes and liquid phase guide holes, and the gas and liquid phases are easily mixed and interfere with each other in the same area.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A porous baffle separation treatment device for waste mineral oil tailings includes a tower body. The top of the tower body is connected to a gas phase outlet, the upper middle part is connected to a liquid phase inlet, the lower part is connected to a gas phase inlet, and the bottom is connected to a liquid phase outlet. Multiple baffles are connected inside the tower body, and the multiple baffles are located between the liquid phase inlet and the gas phase inlet.

[0007] The baffle plate includes a near-circular disk connected inside the tower body, the outline of which is formed by a superior arc segment and a corresponding chord edge;

[0008] The circular disk has multiple air-lifting holes and multiple flow-guiding holes, wherein the air-lifting holes are gas phase flow holes and the flow-guiding holes are liquid phase flow holes.

[0009] A dam is fixedly connected to the top of the chord edge, and the inner side of the dam, the inner wall of the tower body, and the upper surface of the near-circular disc together form a liquid distribution trough.

[0010] Multiple baffles are arranged alternately and staggered along the height of the tower body, with the chord edges of adjacent baffles being parallel to each other, so that the chord edges cooperate with the inner wall of the tower body to form a tortuous upward gas phase channel.

[0011] Preferably, the top of the air vent is connected to an inclined air vent pipe, the top of which is higher than the liquid level inside the liquid distribution tank and lower than the top of the cofferdam, and the top of the inclined air vent pipe is set with an inclined cut.

[0012] Preferably, the top of the air vent is connected to a V-shaped air vent pipe, the top of which is higher than the liquid level inside the liquid distribution tank and lower than the top of the cofferdam, and the top of the V-shaped air vent pipe is set in a V-shape.

[0013] Preferably, a cap is provided above the flow guide hole, and multiple support columns are fixedly connected between the cap and the near-circular disc. The bottom of the cap is located below the liquid surface inside the liquid distribution tank, so that a flow guide gap submerged in liquid is formed between the cap and the near-circular disc.

[0014] Preferably, the inner wall of the tower body is fixedly connected with multiple support rings, each of which corresponds to one of the multiple quasi-circular discs. A fixed flange is fixedly connected between the superior arc segment of each quasi-circular disc and the corresponding support ring. Multiple reinforcing ribs are fixedly connected to the lower surface of each quasi-circular disc. The multiple reinforcing ribs are staggered from the air riser holes and flow guide holes. A flow guide bevel is fixedly connected to the edge of each quasi-circular disc to receive and guide the wall flow on the inner wall of the tower body. The top of the cofferdam is integrally formed with a flow guide tooth edge.

[0015] Preferably, the circular disc body has a heat-conducting channel inside, and the two ends of the heat-conducting channel have a liquid inlet and a liquid outlet respectively; the liquid inlet is connected to a liquid inlet pipe, and the liquid outlet is connected to a liquid outlet pipe; the tower body has a through hole for the liquid inlet pipe and the liquid outlet pipe to pass through in a sealed manner; the liquid inlet pipe is connected to the liquid outlet end of an external constant temperature liquid source, and the liquid outlet pipe is connected to the liquid inlet end of an external constant temperature liquid source, forming a closed-loop constant temperature heat conduction circuit.

[0016] Preferably, a temperature detection port is provided on the tower body, and a temperature probe is sealed and installed inside the temperature detection port. The detection end of the temperature probe extends into the internal space of the tower body. The temperature probe is connected to an external constant temperature liquid source signal to feed back the internal temperature signal of the tower body to the external constant temperature liquid source in order to control the output temperature of the external constant temperature liquid source.

[0017] A porous baffle separation process for waste mineral oil tailings, using the aforementioned porous baffle separation device for waste mineral oil tailings, includes the following steps:

[0018] S1. Assembly of the device: The multi-layer baffles are installed on the support ring on the inner wall of the tower body through the fixed flange. The liquid inlet pipe and liquid outlet pipe pass through the tower body and are connected to the heat conduction channel inside the baffles to form a circulation loop.

[0019] S2. Constant temperature start-up: An external constant temperature liquid source supplies liquid to the heat-conducting channel of the baffle plate through the pipeline, and the temperature probe monitors the internal temperature of the tower in real time.

[0020] S3, tail oil feed: waste mineral oil tail oil enters from the top of the tower body and is distributed to the uppermost baffle plate area by the liquid distributor.

[0021] S4, gas-liquid countercurrent contact: gas phase is introduced into the bottom of the tower body, and it comes into countercurrent contact with the tail oil flowing downward layer by layer through the gas riser hole and gas riser pipe.

[0022] S5. Gas-liquid separation discharge: The gas phase that has completed contact is discharged from the top of the tower, and the tail oil falls layer by layer along the baffle plate through the guide hole and is discharged from the bottom of the tower.

[0023] S6. Constant temperature control: The temperature probe adjusts the external constant temperature liquid source according to the temperature signal to maintain the stable temperature of the liquid layer on the baffle plate.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In this invention, by setting multiple sets of alternating staggered baffles inside the tower, the chord edge of the near-circular disc cooperates with the inner wall of the tower to form a tortuous upward gas phase channel. With the dedicated gas riser and guide hole on the disc, the flow path of the gas phase in the tower can be significantly extended, so that the gas phase and the waste mineral oil tail oil can form a more sufficient countercurrent contact. At the same time, the gas and liquid phases are separated and flowed separately, reducing flow interference and improving gas-liquid mass transfer efficiency and separation uniformity.

[0026] 2. In this invention, the cap and support column above the flow guide hole form an immersion flow guide gap, which can form a reliable liquid seal while ensuring the stable falling of the liquid phase. Combined with the flow guide slope of the baffle plate edge and the flow guide tooth edge of the top of the cofferdam, it can effectively collect the wall flow of the tower and achieve uniform liquid distribution. This is beneficial to maintaining the stability of the liquid layer in the liquid distribution tank, reducing the risk of gas phase crossflow and liquid phase back mixing, and improving the stability of the device operation.

[0027] 3. In this invention, the circular disc integrates a heat-conducting channel, which, together with the inlet pipe, outlet pipe, and external constant-temperature liquid source, forms a closed-loop constant-temperature circuit. Combined with real-time monitoring and signal feedback from the temperature probe, the liquid layer temperature on the baffle plate can be maintained relatively accurately, so that the waste mineral oil tail oil is continuously in a relatively suitable treatment condition, which is conducive to improving the separation and treatment effect and the reliability of the device operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a porous baffle separation treatment device for waste mineral oil tailings proposed in this invention.

[0029] Figure 2 This is a vertical sectional view of the tower body of a porous baffle separation treatment device for waste mineral oil tailings proposed in this invention;

[0030] Figure 3 This is a schematic diagram of the baffle plate structure of a porous baffle separation treatment device for waste mineral oil tailings proposed in this invention;

[0031] Figure 4 for Figure 3 Enlarged diagram of part A in the middle;

[0032] Figure 5 This is a schematic diagram of the bottom structure of the baffle plate in a porous baffle separation treatment device for waste mineral oil tailings proposed in this invention;

[0033] Figure 6 This is a horizontal sectional view of the baffle plate of a porous baffle separation treatment device for waste mineral oil tailings proposed in this invention.

[0034] In the diagram: 1. Tower body; 2. Gas phase outlet; 3. Liquid phase inlet; 4. Gas phase inlet; 5. Liquid phase outlet; 6. Baffle plate; 7. Circular disc; 8. Gas riser hole; 9. Weir; 10. Guide hole; 11. Gas phase channel; 12. Support ring; 13. Fixed flange; 14. Guide bevel; 15. Reinforcing rib; 16. Angled gas riser pipe; 17. V-shaped gas riser pipe; 18. Cap; 19. Support column; 20. Guide gap; 21. Guide toothed edge; 22. Heat conduction channel; 23. Liquid inlet; 24. Liquid outlet; 25. Liquid inlet pipe; 26. Liquid outlet pipe; 27. Temperature detection port; 28. Temperature probe. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] Reference Figures 1-6A porous baffle separation treatment device for waste mineral oil tail oil includes a tower body 1. The top of the tower body 1 is connected to a gas phase outlet 2, the middle and upper part is connected to a liquid phase inlet 3, the lower part is connected to a gas phase inlet 4, and the bottom is connected to a liquid phase outlet 5. Multiple baffles 6 are connected inside the tower body 1, and the multiple baffles 6 are all located between the liquid phase inlet 3 and the gas phase inlet 4.

[0037] The liquid inlet 3 is used to introduce the waste mineral oil tail oil to be treated, the gas inlet 4 is used to introduce the gas medium to be contacted, the arrangement of the baffles 6 covers the core area of ​​gas-liquid contact, ensuring that the tail oil and the gas phase react fully inside the tower body 1, the gas outlet 2 and the liquid outlet 5 are used to discharge the separated gas phase product and the treated liquid phase, respectively, forming a complete flow channel closed loop of feeding, contact, separation and discharge.

[0038] The baffle plate 6 includes a near-circular disk 7 connected inside the tower body 1. The outline of the near-circular disk 7 is formed by the encirclement of a superior arc segment and the corresponding chord edge.

[0039] The superior arc segment of the near-circular disk 7 is adapted to fit the inner wall of the tower body 1, while the chord side is the non-fitted side. Its length is determined according to the design requirements of the inner diameter of the tower body 1 and the gas phase channel 11. The enclosing structure of the superior arc and the chord side not only ensures the effective coverage of the space inside the tower by the disk, but also reserves a reasonable channel for gas phase flow, thus achieving the adaptation of the structure and the flow channel requirements.

[0040] The circular disk 7 has multiple air riser holes 8 and multiple flow guide holes 10 through it, wherein the air riser holes 8 are gas phase flow holes and the flow guide holes 10 are liquid phase flow holes.

[0041] The air riser 8 and the flow guide 10 are arranged in a dispersed manner on the near-circular disk 7. The opening positions of the two avoid each other to prevent the gas phase and liquid phase flow paths from interfering with each other. The diameter of the air riser 8 is designed according to the gas phase flow rate requirements, and the diameter of the flow guide 10 is adapted to the flow characteristics of the tail oil, ensuring that the gas and liquid phases flow through their respective dedicated channels, thereby improving the separation efficiency.

[0042] A cofferdam 9 is fixedly connected to the top of the chord edge. The inner side of the cofferdam 9, the inner wall of the tower body 1, and the upper surface of the near-circular disc body 7 together form a liquid distribution trough.

[0043] The cofferdam 9 is continuously set along the length of the chord edge, and its height allows it to store a certain amount of tail oil to form a stable liquid layer. The volume of the liquid distribution tank is matched with the spacing of the baffles 6 and the tail oil feed rate to ensure that a uniform liquid layer can be formed on each baffle 6, providing a stable interface for gas-liquid contact.

[0044] Multiple baffles 6 are arranged alternately and staggered along the height direction of the tower body 1. The chord edges of adjacent baffles 6 are parallel to each other, so that the chord edges and the inner wall of the tower body 1 cooperate to form a tortuous upward gas phase channel 11.

[0045] The alternating staggered arrangement of the baffles 6 causes the gas phase channel 11 to extend in an S-shape, prolonging the residence time of the gas phase in the tower. The parallel arrangement of the chord edges ensures that the cross-sectional dimensions of the gas phase channel 11 are uniform, avoiding insufficient gas-liquid contact caused by sudden changes in gas phase flow velocity. At the same time, it guides the tail oil to flow downwards layer by layer along the baffles 6, achieving the core requirement of gas-liquid countercurrent contact.

[0046] The top of the air vent 8 is connected to an inclined air vent pipe 16. The top of the inclined air vent pipe 16 is higher than the liquid level inside the liquid distribution tank and lower than the top of the cofferdam 9. The top of the inclined air vent pipe 16 is set with an inclined cut.

[0047] The axial length of the inclined air riser 16 is determined according to the designed liquid level of the liquid distribution tank. Its top is higher than the liquid level to prevent tail oil from backflowing into the air riser 8, and lower than the top of the cofferdam 9 so as not to affect the smooth discharge of the gas phase. The setting direction of the inclined cut is adapted to the gas phase flow direction to reduce the resistance when the gas phase is discharged, and at the same time to prevent the airflow from directly impacting the liquid layer in the liquid distribution tank, thus maintaining the stability of the liquid layer.

[0048] The top of the air vent 8 is connected to a V-shaped air vent pipe 17. The top of the V-shaped air vent pipe 17 is higher than the liquid level inside the liquid distribution tank and lower than the top of the cofferdam 9. The top of the V-shaped air vent pipe 17 is set with a V-shaped opening.

[0049] V-shaped riser pipe 17 and oblique riser pipe 16 are two optional implementation structures. They can be used alone or in combination on different riser holes 8. The V-shaped opening structure design increases the outlet area of ​​the gas phase discharge, which is suitable for the flow requirements of large flow gas phase. At the same time, the oblique sides of the V-shaped opening can guide the airflow to diffuse smoothly, avoid violent impact with the liquid layer, and further improve the stability of gas-liquid contact.

[0050] A cap 18 is provided above the flow guide hole 10. Multiple support columns 19 are fixedly connected between the cap 18 and the near-circular disc 7. The bottom of the cap 18 is located below the liquid surface inside the liquid distribution tank, so that a flow guide gap 20 immersed in the liquid is formed between the cap 18 and the near-circular disc 7.

[0051] The support columns 19 are evenly distributed along the edge or bottom of the cap 18. Their length is determined according to the design width of the guide gap 20 to ensure that a stable guide gap 20 is formed between the cap 18 and the near-circular disk 7. The coverage area of ​​the cap 18 is larger than the aperture of the guide hole 10. The bottom is submerged below the liquid surface, so that the tail oil needs to flow around the guide gap 20 to enter the guide hole 10, avoiding the gas phase from rising through the guide hole 10. At the same time, it prolongs the residence time of the tail oil in the liquid distribution tank and enhances the gas-liquid contact effect.

[0052] Multiple support rings 12 are fixedly connected to the inner wall of the tower body 1. Each support ring 12 corresponds to a multiple circular disc 7. A fixed flange 13 is fixedly connected between the superior arc segment of the circular disc 7 and the corresponding support ring 12.

[0053] The support ring 12 is arranged circumferentially along the inner wall of the tower body 1. Its structural strength is compatible with the weight and liquid pressure of the near-circular disc 7, providing stable support for the baffle plate 6. The fixed flange 13 achieves a detachable connection between the near-circular disc 7 and the support ring 12 through bolts and other fasteners, which facilitates the installation, maintenance and replacement of the device.

[0054] Multiple reinforcing ribs 15 are fixedly connected to the lower surface of the circular disc 7. The multiple reinforcing ribs 15 are staggered from the air riser 8 and the flow guide 10.

[0055] The reinforcing ribs 15 are arranged radially or in a grid pattern, and their positions avoid the air riser holes 8 and the guide holes 10. They enhance the structural rigidity of the near-circular disc 7 without affecting the gas-liquid flow, and prevent deformation under long-term liquid pressure.

[0056] The edge of the circular disc 7 is fixedly connected with a flow guide bevel 14, which is used to receive and guide the wall flow on the inner wall of the tower body 1.

[0057] The guide slope 14 is a downward-sloping annular structure. Its tilt angle is adapted to the wall flow characteristics of the inner wall of the tower body 1, ensuring that the wall flow can smoothly flow into the liquid distribution tank cavity and avoid liquid waste caused by the wall flow falling directly down the tower wall.

[0058] The top of the cofferdam 9 is integrally formed with a guide tooth edge 21.

[0059] The guide teeth 21 are continuously distributed along the top of the cofferdam 9. The toothed structure can divide the tail oil in the liquid distribution tank into a uniform liquid flow and guide the tail oil to be evenly distributed along the width of the near-circular disc 7, thereby improving the comprehensiveness of gas-liquid contact.

[0060] The opening of the inclined riser pipe 16 points upwards to the liquid curtain overflowing from the guide tooth edge 21, further improving the liquid-gas contact effect.

[0061] The interior of the circular disc 7 is provided with a heat conduction channel 22. The two ends of the heat conduction channel 22 are respectively provided with a liquid inlet 23 and a liquid outlet 24. The liquid inlet 23 is connected to a liquid inlet pipe 25, and the liquid outlet 24 is connected to a liquid outlet pipe 26. The tower body 1 is provided with a through hole for the liquid inlet pipe 25 and the liquid outlet pipe 26 to pass through in a sealed manner. The liquid inlet pipe 25 is connected to the liquid outlet end of an external constant temperature liquid source, and the liquid outlet pipe 26 is connected to the liquid inlet end of an external constant temperature liquid source, forming a closed-loop constant temperature heat conduction circuit.

[0062] The heat transfer channel 22 is arranged in a meandering or serpentine manner inside the near-circular disc 7. Its flow path covers the main area of ​​the near-circular disc 7, ensuring that the heat transfer liquid can uniformly transfer heat to the entire disc and the liquid layer above. The liquid inlet 23 and the liquid outlet 24 are respectively located on the two sides of the near-circular disc 7, which facilitates connection with the liquid inlet pipe 25 and the liquid outlet pipe 26. The through holes on the tower body 1 are equipped with sealing elements to prevent gas and liquid leakage or the entry of external impurities. The closed-loop circuit structure design allows the heat transfer liquid to be recycled. The temperature of the heat transfer liquid is continuously adjusted by an external constant temperature liquid source, so as to achieve precise control of the tail oil temperature in the liquid distribution tank.

[0063] A temperature detection port 27 is provided on the tower body 1. A temperature probe 28 is sealed inside the temperature detection port 27. The detection end of the temperature probe 28 extends into the internal space of the tower body 1. The temperature probe 28 is connected to an external constant temperature liquid source signal to feed back the internal temperature signal of the tower body 1 to the external constant temperature liquid source in order to control the output temperature of the external constant temperature liquid source.

[0064] The temperature detection port 27 is located close to the baffle plate 6 to ensure that the temperature probe 28 can detect the true temperature of the gas-liquid contact area. The sealed installation structure not only ensures the sealing of the tower body 1, but also fixes the position of the temperature probe 28 to prevent it from being displaced by airflow or liquid flow. The signal connection between the temperature probe 28 and the external constant temperature liquid source adopts wired or wireless transmission. Its detection accuracy is adapted to the temperature control requirements. Through the closed-loop control logic of real-time detection, signal feedback and temperature adjustment, the temperature of the tail oil in the tower is kept stable within the range suitable for the separation reaction, ensuring the consistency of the separation effect.

[0065] When the device is in operation, the waste mineral oil tail oil to be treated enters the tower from the liquid inlet 3 in the upper part of the tower body 1. It is evenly distributed to the liquid distribution trough of the uppermost baffle plate 6 by the liquid distribution mechanism at the top of the tower. The small amount of wall flow generated on the inner wall of the tower body 1 is received by the guide inclined edge 14 at the edge of the baffle plate 6 and flows into the liquid distribution trough, where it merges with the mainstream liquid.

[0066] The liquid in the liquid distribution tank forms a stable liquid layer under the obstruction of the weir 9. The height of the liquid layer submerges the guide gap 20, forming a liquid seal structure to prevent the gas phase from flowing through the liquid phase channel. The guide tooth edge 21 evenly distributes the liquid, so that the liquid layer remains stable on the baffle plate 6.

[0067] The gas phase to be reacted enters from the gas phase inlet 4 at the bottom of the tower body 1, flows upward in a tortuous manner along the gas phase channel 11 formed by the alternating staggered arrangement of the multi-layer baffles 6, and is discharged upward through the gas riser 8 and the inclined gas riser 16 or V-shaped gas riser 17 at the top, forming a countercurrent contact with the downward flowing tail oil to complete the gas-liquid mass transfer and separation.

[0068] Under the influence of gravity, the tail oil drips down layer by layer through the guide gap 20 and the guide hole 10, flows through each layer of baffle 6 in sequence, and is finally discharged from the liquid phase outlet 5 at the bottom of the tower body 1. The separated gas phase is discharged from the gas phase outlet 2 at the top of the tower body 1.

[0069] During operation, an external constant-temperature liquid source provides circulating constant-temperature heat transfer liquid to the heat transfer channel 22 inside the baffle plate 6 through the inlet pipe 25 and the outlet pipe 26, thereby regulating the temperature of the liquid layer. The temperature probe 28 monitors the temperature inside the tower in real time and feeds it back to the constant-temperature liquid source, automatically adjusting the temperature of the heat transfer liquid to keep the liquid layer on the baffle plate stable, ensuring the continuous, efficient and stable operation of the gas-liquid separation process.

[0070] A porous baffle separation process for waste mineral oil tailings, using the aforementioned porous baffle separation device for waste mineral oil tailings, includes the following steps:

[0071] S1. Assembly of the device: The multi-layer baffle plate 6 is installed on the support ring 12 on the inner wall of the tower body 1 through the fixed flange 13. The liquid inlet pipe 25 and the liquid outlet pipe 26 pass through the tower body 1 in a sealed manner and are connected to the heat conduction channel 22 inside the baffle plate 6 to form a circulation loop.

[0072] S2. Constant temperature start-up: An external constant temperature liquid source supplies liquid to the heat conduction channel 22 of the baffle plate 6 through the pipeline, and the temperature probe 28 monitors the internal space temperature of the tower body 1 in real time.

[0073] S3, tail oil feed: waste mineral oil tail oil enters from the upper part of tower body 1 and is distributed to the uppermost baffle plate 6 area by the liquid distributor.

[0074] S4, gas-liquid countercurrent contact, gas phase is introduced into the bottom of tower body 1, and comes into countercurrent contact with the tail oil flowing downward layer by layer through the gas riser hole 8 and the gas riser pipe.

[0075] S5. Gas-liquid separation and discharge: The gas phase that has completed contact is discharged from the top of the tower body 1, and the tail oil falls layer by layer along the baffle plate 6 through the guide hole 10 and is discharged from the bottom of the tower.

[0076] S6. Constant temperature control: Temperature probe 28 adjusts the external constant temperature liquid source according to the temperature signal to maintain the stable temperature of the liquid layer on baffle 6.

[0077] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A porous baffle separation treatment device for waste mineral oil tailings, comprising a tower body (1), wherein the top of the tower body (1) is connected to a gas phase outlet (2), the upper middle part is connected to a liquid phase inlet (3), the lower part is connected to a gas phase inlet (4), and the bottom is connected to a liquid phase outlet (5), characterized in that: The tower body (1) is internally connected to multiple baffles (6), and the multiple baffles (6) are located between the liquid phase inlet (3) and the gas phase inlet (4); The baffle (6) includes a near-circular disk (7) connected inside the tower body (1), the outline of which is formed by the encirclement of a superior arc segment and the corresponding chord edge; The circular disk (7) is provided with multiple air-lifting holes (8) and multiple flow-guiding holes (10), wherein the air-lifting holes (8) are gas phase flow holes and the flow-guiding holes (10) are liquid phase flow holes; The top of the chord edge is fixedly connected to a cofferdam (9), and the inner side of the cofferdam (9), the inner wall of the tower body (1), and the upper surface of the quasi-circular disc (7) together form a liquid distribution trough. Multiple baffles (6) are arranged alternately and staggered along the height direction of the tower body (1), and the chord edges of adjacent baffles (6) are parallel to each other, so that the chord edges and the inner wall of the tower body (1) cooperate to form a tortuous upward gas phase channel (11).

2. The porous baffle separation treatment device for waste mineral oil tailings according to claim 1, characterized in that, The top of the air vent (8) is connected to an inclined air vent pipe (16). The top of the inclined air vent pipe (16) is higher than the liquid level inside the liquid distribution tank and lower than the top of the cofferdam (9). The top of the inclined air vent pipe (16) is set with an inclined cut.

3. The porous baffle separation treatment device for waste mineral oil tailings according to claim 2, characterized in that, The top of the air vent (8) is connected to a V-shaped air vent pipe (17). The top of the V-shaped air vent pipe (17) is higher than the liquid level inside the liquid distribution tank and lower than the top of the cofferdam (9). The top of the V-shaped air vent pipe (17) is set with a V-shaped opening.

4. The porous baffle separation treatment device for waste mineral oil tailings according to claim 3, characterized in that, The top of the guide hole (10) is covered with a cap (18), and a plurality of support columns (19) are fixedly connected between the cap (18) and the circular disc (7). The bottom of the cap (18) is located below the liquid surface inside the liquid distribution tank, so that a guide gap (20) immersed in the liquid is formed between the cap (18) and the circular disc (7).

5. The porous baffle separation treatment device for waste mineral oil tailings according to claim 4, characterized in that, The inner wall of the tower body (1) is fixedly connected with multiple support rings (12), and the multiple support rings (12) correspond one-to-one with the multiple circular discs (7). The superior arc segment of the circular disc (7) is fixedly connected with the corresponding support ring (12) by a fixed flange (13). The lower surface of the circular disc (7) is fixedly connected with multiple reinforcing ribs (15). The multiple reinforcing ribs (15) are staggered from the air riser (8) and the flow guide (10). The edge of the circular disc (7) is fixedly connected with a flow guide bevel (14) to receive and guide the wall flow of the inner wall of the tower body (1). The top of the cofferdam (9) is integrally formed with a flow guide tooth edge (21).

6. The porous baffle separation treatment device for waste mineral oil tailings according to claim 5, characterized in that, The circular disc (7) has a heat-conducting channel (22) inside. The heat-conducting channel (22) has an inlet (23) and an outlet (24) at both ends. The inlet (23) is connected to an inlet pipe (25), and the outlet (24) is connected to an outlet pipe (26). The tower body (1) has a through hole for the inlet pipe (25) and the outlet pipe (26) to pass through in a sealed manner. The inlet pipe (25) is connected to the outlet end of an external constant temperature liquid source, and the outlet pipe (26) is connected to the inlet end of an external constant temperature liquid source, forming a closed-loop constant temperature heat conduction circuit.

7. The porous baffle separation treatment device for waste mineral oil tailings according to claim 6, characterized in that, The tower body (1) is provided with a temperature detection port (27). A temperature probe (28) is sealed inside the temperature detection port (27). The detection end of the temperature probe (28) extends into the internal space of the tower body (1). The temperature probe (28) is connected to an external constant temperature liquid source signal to feed back the internal temperature signal of the tower body (1) to the external constant temperature liquid source in order to control the output temperature of the external constant temperature liquid source.

8. A porous baffle separation process for treating waste mineral oil tailings, characterized in that, The porous baffle separation treatment device for waste mineral oil tailings as described in claim 7 includes the following steps: S1. Assembly of the device: The multi-layer baffle (6) is installed on the support ring (12) on the inner wall of the tower body (1) through the fixed flange (13). The liquid inlet pipe (25) and liquid outlet pipe (26) pass through the tower body (1) in a sealed manner and are connected to the heat conduction channel (22) inside the baffle (6) to form a circulation loop. S2, constant temperature start-up, the external constant temperature liquid source supplies liquid to the heat conduction channel (22) of the baffle (6) through the pipeline, and the temperature probe (28) monitors the internal space temperature of the tower body (1) in real time; S3, tail oil feed: waste mineral oil tail oil enters from the top of the tower body (1) and is distributed to the uppermost baffle plate (6) area by the liquid distributor; S4, gas-liquid countercurrent contact, gas phase is introduced into the bottom of the tower body (1), and the gas phase is contacted in the opposite direction with the tail oil flowing downward layer by layer through the gas riser hole (8) and the gas riser pipe. S5, gas-liquid separation and discharge: the gas phase that has completed contact is discharged from the top of the tower body (1), and the tail oil falls layer by layer along the baffle plate (6) through the guide hole (10) and is discharged from the bottom of the tower. S6. Constant temperature control: The temperature probe (28) adjusts the external constant temperature liquid source according to the temperature signal to maintain the stable temperature of the liquid layer on the baffle (6).

Images