Extraction and separation extraction tower for preparing anti-wear agent

Abstract

The invention belongs to the technical field of separation and extraction towers, and discloses a separation and extraction tower for preparing an anti-wear agent, which comprises a tower body, the bottom of the tower body is fixedly connected with a base, the two sides of the upper end of the tower body are fixedly communicated with a light liquid outlet and a heavy liquid inlet respectively, and the two sides of the lower end of the tower body are fixedly communicated with a light liquid inlet and a heavy liquid outlet respectively. Through cooperation of adjusting plates, a sieve plate, a long rod and other structures, the adaptability of the sieve plate is effectively improved, during extraction, the long rod can synchronously drive the multiple adjusting plates to rotate, and due to the fact that the diameter of a thick gear is larger than that of a thin gear, the thick gear rotates at a reduced speed, and the adjusting plates slowly rotate; the mesh position of the screen plate is moved out of the mesh of the screen plate, the mesh of the screen plate is shielded by the entity, so that the aperture of the screen plate is reduced, the adjusting accuracy can be improved by slowly rotating the adjusting plate, and the adaptability is enhanced by adjusting the mesh and improving the operation elasticity.

Description

Technical Field

[0001] This invention belongs to the field of separation and extraction tower technology, specifically an extraction and separation tower for the preparation of anti-wear agents. Background Technology

[0002] In the chemical synthesis of anti-wear agents, such as zinc dialkyl dithiophosphate (ZDDP), organomolybdenum compounds, borate esters, and ashless anti-wear agents, multiple steps of reaction are usually involved. After the reaction, the resulting product mixture usually contains the target anti-wear agent, unreacted raw materials, by-products, solvents, catalyst residues, and impurities. In order to obtain high-purity, high-quality, and compliant anti-wear agent products, the target product must be separated and purified from these mixtures. Liquid-liquid extraction is a commonly used separation technique, and the extraction tower is the key equipment for realizing this continuous or semi-continuous liquid-liquid extraction operation.

[0003] Existing technical document CN107158744B discloses an extraction tower, an extraction separation system, and a coal tar extraction process. The extraction tower includes a stirring device, a filter screen, and nested outer and inner cylinders. The filter screen is detachably installed at the bottom of the inner cylinder. The extraction separation system includes an extraction tower and a separation unit. The separation unit includes an extract phase storage tank, a separator, a solvent storage tank, and an extract storage tank. The extract phase discharge pipe, the extract phase storage tank, and the separator are connected sequentially. The extract phase is separated into extract and solvent by the separator. The separated solvent is stored in the solvent storage tank and can be returned to the inner cylinder through a solvent inlet pipe. The extraction tower is designed to avoid clogging, is easy to maintain, and effectively mitigates backmixing during the extraction separation process. The extraction separation system and process can achieve rapid and efficient separation of light and heavy components and impurities in coal tar under mild conditions, reducing residual bitumen. The medium is rich in coke powder, coal powder, and inorganic minerals. Although the impurities that clog the filter screen can be washed away by the solvent to avoid clogging, the current sieve plate extraction towers are usually designed with a fixed opening structure, which makes adjustment difficult. The opening area on the sieve plate is fixed and cannot be flexibly adjusted according to the throughput or changes in physical properties. When the flow rate fluctuates, if it is lower than the design value, the liquid phase is prone to "leakage" phenomenon, which is that the liquid phase falls directly through the sieve holes instead of forming droplets, resulting in a sharp reduction in the mass transfer area. On the other hand, if the flow rate is too high, it may cause "flooding" phenomenon, in which the two phases cannot be effectively separated. Therefore, it is necessary to optimize the existing sieve plates. Summary of the Invention

[0004] To address the problem mentioned in the background art that the opening area on the sieve plate is fixed and cannot be flexibly adjusted according to the throughput or changes in physical properties, the present invention provides an extraction and separation tower for the preparation of anti-wear agents.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an extraction and separation tower for the preparation of an anti-wear agent, comprising a tower body, a base fixedly connected to the bottom of the tower body, a light liquid outlet and a heavy liquid inlet fixedly connected to the upper two sides of the tower body respectively, a light liquid inlet and a heavy liquid outlet fixedly connected to the lower two sides of the tower body respectively, a controller installed in the middle of the tower body, and further comprising: a rotary impurity removal mechanism connected to the tower body; and an orifice adjustment mechanism located on the rotary impurity removal mechanism;

[0006] The rotary impurity removal mechanism can rotate and drive the orifice adjustment mechanism, which can not only rotate and clean impurities in the mesh, but also adjust the orifice size according to the material throughput and changes in physical properties. The light phase, i.e., the mixed liquid dispersion phase containing anti-wear agent, is introduced into the bottom of the tower through the light liquid inlet 5. After being dispersed in the sieving step, it rises in the heavy phase, i.e., the continuous phase, and gathers into a light liquid layer at the lower part of the previous sieving position. It then disperses and gathers again. The light liquid outlet at the top of the tower and the heavy liquid outlet at the bottom of the tower respectively yield the extract phase anti-wear agent and the raffinate phase other mixed liquids.

[0007] Preferably, the rotating impurity removal mechanism includes a long rod that extends through the middle of the tower body. A thick gear is fixedly connected to the top of the long rod, and a drive motor is fixedly connected to the upper end of the tower body. A thin gear is fixedly driven to the output end of the drive motor, and the thick gear meshes with the thin gear. The diameter of the thick gear is larger than that of the thin gear. Therefore, when the drive motor drives the thick gear to rotate through the thin gear, the thick gear rotates at a reduced speed, which facilitates slight rotation of the long rod and helps to accurately adjust the aperture size. At the same time, the thickness design of the thick gear also ensures that when the long rod switches to reciprocating up and down motion, the thick gear always remains meshed with the thin gear.

[0008] Preferably, the upper end of the long rod is threadedly connected to a threaded sleeve, and the bottom of the threaded sleeve is slidably connected to several iron columns. An electromagnet is snapped into the bottom of each iron column, and the bottom of the electromagnet is fixed to the tower body.

[0009] Preferably, a concave stop block is slidably connected to the long rod, the outer wall of the concave stop block is fixed to the inside of the tower body, and the concave part of the concave stop block is fixedly connected to the heavy liquid outlet.

[0010] Preferably, the adjusting mechanism includes several adjusting plates and limiting rings, both of which are fixedly connected to the long rod at equal intervals.

[0011] Preferably, both the adjusting plate and the limiting ring are provided with a sieve plate in the middle, and the sieve plate is rotatably connected to the long rod.

[0012] Preferably, the sieve plate is configured as an elliptical cover with a raised top, and the adjusting plate is configured in a hat shape.

[0013] Preferably, the top of the sieve plate and the entire adjusting plate are provided with a number of mesh holes, and the mesh holes of the sieve plate and the adjusting plate are staggered; the sieve plate is set as an elliptical cover with a raised top, which can discharge the light liquid in stages and at the same time disperse the liquid on the side, increase the dispersion area and improve the extraction efficiency; the adjusting plate is set in a hat shape, which completely fits the mesh hole position on the top of the sieve plate, so that when the adjusting plate rotates, the size of the mesh hole of the sieve plate can be adjusted evenly and consistently.

[0014] Preferably, a pair of sliding grooves are provided on both sides of the sieve plate, and a slider is slidably connected in each of the sliding grooves. The outer side of each slider is fixed to the inner cavity of the tower body.

[0015] Preferably, the side wall of the sieve plate below is provided with a vertical groove, and the sieve plate is connected to the light liquid inlet through the vertical groove; when the long rod moves up and down and rotates, it can drive the adjusting plate to move accordingly, while the sieve plate will not rotate due to the limitation of the slider, but it can move up and down through the sliding groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention effectively improves the adaptability of the sieve plate by setting up a combination of adjusting plates, sieve plates, and long rods. During extraction, the long rod can drive several adjusting plates to rotate synchronously. Because the diameter of the thick gear is set to be larger than that of the thin gear, the thick gear rotates at a reduced speed, causing the adjusting plates to rotate slowly and move their mesh positions out of the sieve plate's mesh. By using solid blocks to cover the sieve plate's mesh, the aperture of the sieve plate is reduced. Furthermore, the slow rotation of the adjusting plates can improve the accuracy of adjustment. The adjustable mesh enhances operational flexibility, thereby increasing adaptability.

[0018] In addition, the sieve plate is designed as an elliptical cover with a raised top, which can discharge the light liquid in stages. At the same time, the liquid can also be dispersed and discharged from the side, increasing the dispersion area and improving the extraction efficiency. The adjusting plate is designed in the shape of a cap, which fits perfectly with the mesh position on the top of the sieve plate. When the adjusting plate rotates, it can uniformly adjust the size of the mesh of the sieve plate, improve the dispersion effect of the light liquid, and thus promote the mass transfer process.

[0019] This invention facilitates the anti-clogging and impurity removal of the screen plate by using a combination of a threaded sleeve, thick gears, and a slider. An electromagnet is used to attract and hold the iron rod inside, locking the threaded sleeve. When the long rod is driven to rotate, the threads of the threaded sleeve compress it, causing the sleeve to move downwards while rotating. Driven by the direction of the drive motor, the long rod can also rotate upwards to reset. This reciprocating operation causes the long rod to move up and down while rotating, resulting in the screen plate and adjusting plate moving up and down together. Simultaneously, the adjusting plate rotates and rubs against the inner surface of the top of the screen plate. The up-and-down movement allows liquid to pass through the orifices, employing hydraulic unblocking. The rotational friction of the adjusting plate cuts off the long, strip-shaped blocking material within the orifices, facilitating better unblocking. This eliminates the need for frequent machine shutdowns for cleaning, saving cleaning time and reducing labor maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front section structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 A magnified view of the structure at point A in the middle;

[0022] Figure 3 For the present invention Figure 1 A magnified schematic diagram of the structure at point B in the middle;

[0023] Figure 4 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 5 This is a schematic diagram showing the structural fit between the screen and the adjusting plate of the present invention;

[0025] Figure 6 This is a schematic diagram showing the structural fit between the limiting ring and the long rod of the present invention;

[0026] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point C in the middle;

[0027] Figure 8 This is a schematic diagram showing the structural fit between the slider and the tower body of the present invention;

[0028] Figure 9 This is a schematic diagram showing the structural fit between the vertical groove and the screen in this invention;

[0029] Figure 10 This is a schematic diagram showing the structural fit between the adjusting plate and the long rod of the present invention;

[0030] Figure 11 This is a top cross-sectional view of the present invention.

[0031] In the picture:

[0032] 1. Tower body; 2. Base; 3. Controller; 4. Light liquid outlet; 5. Light liquid inlet; 6. Heavy liquid inlet; 7. Heavy liquid outlet; 8. Rotary impurity removal mechanism; 81. Thick gear; 82. Thin gear; 83. Threaded sleeve; 84. Electromagnet; 85. Long rod; 86. Drive motor; 87. Concave stop block; 88. Iron column; 9. Adjustment mechanism; 91. Sieve plate; 92. Adjusting plate; 93. Limiting ring; 94. Vertical groove; 95. Sliding block; 96. Slide groove. Detailed Implementation

[0033] 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.

[0034] like Figures 1 to 11 As shown, the present invention provides an extraction and separation tower for the preparation of anti-wear agents, comprising a tower body 1, a base 2 fixedly connected to the bottom of the tower body 1, a light liquid outlet 4 and a heavy liquid inlet 6 fixedly connected to the upper two sides of the tower body 1 respectively, a light liquid inlet 5 and a heavy liquid outlet 7 fixedly connected to the lower two sides of the tower body 1 respectively, a controller 3 installed in the middle of the tower body 1, and further comprising: a rotary impurity removal mechanism 8 connected to the tower body 1; and an orifice adjustment mechanism 9 located on the rotary impurity removal mechanism 8.

[0035] Among them, the rotary impurity removal mechanism 8 can rotate and drive the aperture adjustment mechanism 9, which can not only rotate and clean impurities in the mesh, but also adjust the aperture size according to the material processing volume and changes in physical properties.

[0036] Using the above scheme: During the extraction process, a light phase, i.e., a mixed liquid dispersion containing anti-wear agents, is introduced into the bottom of the column through light liquid inlet 5. After being dispersed in the sieving step, it rises in the heavy phase, i.e., the continuous phase, such as... Figure 5 The arrow indicates that the liquid is moving upwards; at this point, the direction of liquid flow in the continuous phase is as follows: Figure 5 As indicated by the arrow, the mixture moves downwards, accumulating into a light liquid layer below the previous sieve position. This process repeats, with the number of sieve plates 91 designed according to the specific proportions of the mixture. The dispersion process of the mixture is the extraction mass transfer process. The light liquid outlet 4 at the top of the column and the heavy liquid outlet 7 at the bottom of the column yield the extract phase anti-wear agent and the raffinate phase other mixtures, respectively.

[0037] like Figure 2 As shown, the rotating impurity removal mechanism 8 includes a long rod 85 that moves through the middle of the tower body 1. A thick gear 81 is fixedly connected to the top of the long rod 85. A drive motor 86 is fixedly connected to the upper end of the tower body 1. A thin gear 82 is fixedly driven at the output end of the drive motor 86. The thick gear 81 and the thin gear 82 are meshed and connected.

[0038] like Figure 2 , Figure 3 and Figure 5 As shown, a threaded sleeve 83 is threadedly connected to the upper end of the long rod 85, and several iron pillars 88 are slidably connected to the bottom of the threaded sleeve 83. An electromagnet 84 is snapped into the bottom of the iron pillars 88, and the bottom of the electromagnet 84 is fixedly connected to the tower body 1. A concave stop block 87 is slidably connected to the long rod 85, and the outer wall of the concave stop block 87 is fixedly connected to the inside of the tower body 1. The concave part of the concave stop block 87 is fixedly connected to the heavy liquid outlet 7.

[0039] The above scheme employs the following: the drive motor 86 is electrically connected to the controller 3, and a reverser is installed on the drive motor 86 to facilitate the reverse rotation of the long rod 85. The electromagnet 84 is electrically connected to the controller 3, allowing the electromagnet 84 to attract and engage the iron column 88, thereby locking the position of the threaded sleeve 83 and switching the operating state of the long rod 85. The diameter of the thick gear 81 is larger than that of the thin gear 82. Therefore, when the drive motor 86 drives the thick gear 81 to rotate through the thin gear 82, the thick gear 81 rotates at a reduced speed, facilitating a slight rotation of the long rod 85 and enabling precise adjustment of the hole size. Simultaneously, the thickness design of the thick gear 81 ensures that when the long rod 85 switches to reciprocating motion, the thick gear 81 remains engaged with the thin gear 82.

[0040] like Figure 6 and Figure 7 As shown, the adjusting mechanism 9 includes several adjusting plates 92 and limiting rings 93, both of which are fixedly connected to the long rod 85 at equal intervals; a sieve plate 91 is provided in the middle of both the adjusting plate 92 and the limiting ring 93, and the sieve plate 91 is rotatably connected to the long rod 85.

[0041] like Figure 7 As shown, the sieve plate 91 is configured as an elliptical cover with a raised top, and the adjusting plate 92 is configured in the shape of a hat; the top of the sieve plate 91 and the entire adjusting plate 92 are provided with a number of mesh holes, and the mesh holes of the sieve plate 91 and the adjusting plate 92 are arranged alternately.

[0042] like Figures 8 to 11 As shown, a pair of sliding grooves 96 are provided on both sides of the sieve plate 91, and a slider 95 is slidably connected in the sliding groove 96. The outer side of the slider 95 is fixed to the inner cavity of the tower body 1. A vertical groove 94 is provided on the side wall of the lower sieve plate 91, and the sieve plate 91 is connected to the light liquid inlet 5 through the vertical groove 94.

[0043] The above solution involves the thick gear 81 rotating at a reduced speed, causing the adjusting plate 92 to rotate slowly and move its mesh position out of the mesh of the sieve plate 91. This solid structure blocks the mesh of the sieve plate 91, thus reducing its aperture. Furthermore, the slow rotation of the adjusting plate 92 improves adjustment accuracy and avoids ineffective adjustments. Similarly, when the aperture of the sieve plate 91 needs to be enlarged, the drive motor 86 continues to rotate the long rod 85, gradually aligning the mesh of the adjusting plate 92 with the sieve plate 91, thereby enlarging the aperture of the sieve plate 91 and effectively improving its adaptability. When the long rod 85 moves up and down and rotates, it moves the adjusting plate 92 accordingly. The sieve plate 91, limited by the slider 95, does not rotate but can move up and down via the slide groove 96. At this time, the screen plate 91 and the adjusting plate 92 are in the following state: the screen plate 91 and the adjusting plate 92 move up and down together, while the adjusting plate 92 rotates and rubs back and forth on the inner surface of the top of the screen plate 91. The liquid is allowed to pass through the orifice by moving up and down, and hydraulic unblocking is used. The rotational friction of the adjusting plate 92 cuts off the long strip-shaped blocking material in the orifice, so as to better unblock it.

[0044] Working principle and usage process of this invention:

[0045] First, during the separation and extraction of the anti-wear agent in the extraction tower, a light phase, i.e., a mixed liquid dispersion containing the anti-wear agent, is introduced into the bottom of the tower through the light liquid inlet 5. After being dispersed by the sieve plate 91, it rises in the heavy phase, i.e., the continuous phase that assists in the extraction. Figure 5 The arrow indicates that the liquid is moving upwards; at this point, the direction of liquid flow in the continuous phase is as follows: Figure 5 As indicated by the arrow, the mixture moves downwards, accumulating into a light liquid layer below the upper sieve plate 91. This process repeats, with the number of sieve plates 91 designed according to the specific proportions of the mixture. The dispersion process of the mixture is the extraction mass transfer process. The light liquid outlet 4 at the top of the column and the heavy liquid outlet 7 at the bottom of the column yield the extract phase anti-wear agent and the raffinate phase other mixtures, respectively.

[0046] During extraction, the aperture size of the sieve plate 91 is adjusted in real time according to the material throughput and changes in its properties. When a smaller aperture is required for the sieve plate 91, the electromagnet 84 is energized beforehand via the controller 3, repelling the iron column 88 above the electromagnet 84, keeping the threaded sleeve 83 rotating and allowing it to move synchronously with the long rod 85. The controller 3 starts the drive motor 86 to rotate the thin gear 82, which then meshes with the thick gear 81 and rotates synchronously. The thick gear 81 then drives the long rod 85 to rotate. Since the adjusting plate 92 and the limiting ring 93 are both fixed to the long rod 85, the long rod 85 can synchronously drive several adjusting plates 92 to rotate. Because the diameter of the thick gear 81 is larger than that of the thin gear 82, the thick gear 81 rotates at a reduced speed, causing the adjusting plate 92 to rotate slowly, moving its mesh position out of the mesh of the sieve plate 91. By using a solid block to cover the mesh of the sieve plate 91, the aperture size of the sieve plate 91 is reduced. Furthermore, the slow rotation of the adjusting plate 92 improves the accuracy of the adjustment and avoids ineffective adjustments. Similarly, when it is necessary to enlarge the aperture of the sieve plate 91, the drive motor 86 continues to drive the long rod 85 to rotate, and then the mesh of the adjusting plate 92 is gradually aligned with the sieve plate 91, thereby enlarging the aperture of the sieve plate 91, which can effectively improve the adaptability of the sieve plate 91.

[0047] Based on the characteristics of the anti-wear agent mixture, preset parameters are set on controller 3, and a suitable cycle is selected to clean and remove impurities from the sieve plate 91 to prevent clogging of the apertures. When electromagnet 84 is energized, it generates a reverse magnetic field, attracting and locking the iron rod 88 inside the electromagnet 84, causing the threaded sleeve 83 to switch to a locked state. At this time, when the long rod 85 is driven to rotate, it will not drive the threaded sleeve 83 to rotate. Instead, the threaded sleeve 83 is squeezed by its threads, causing it to rotate while moving downwards. Driven by the direction of the drive motor 86, the long rod 85 can also rotate upwards to reset. During this reciprocating operation, the long rod 85 moves up and down while rotating, which can drive the adjusting plate 92 to move accordingly. The sieve plate 91 will not rotate due to the limit of the slider 95, but it can move up and down via the slide groove 96. The screen plate 91 and the adjusting plate 92 are in motion together, moving up and down reciprocating. Simultaneously, the adjusting plate 92 rotates and rubs against the inner surface of the top of the screen plate 91. This up-and-down movement forces the liquid through the orifices, using hydraulic dredging. The rotational friction of the adjusting plate 92 cuts off long, strip-shaped blocking materials within the orifices, facilitating better dredging. This periodic cleaning of the screen plate 91 orifices effectively prevents clogging and reduces manual maintenance costs.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An extraction and separation tower for preparing an anti-wear agent, comprising a tower body (1), a base (2) fixedly connected to the bottom of the tower body (1), a light liquid outlet (4) and a heavy liquid inlet (6) respectively fixedly connected to the upper two sides of the tower body (1), a light liquid inlet (5) and a heavy liquid outlet (7) respectively fixedly connected to the lower two sides of the tower body (1), and a controller (3) installed in the middle of the tower body (1), characterized in that: Also includes: A rotating impurity removal mechanism (8) is connected to the tower body (1); The hole adjustment mechanism (9) is located on the rotary impurity removal mechanism (8); The rotary impurity removal mechanism (8) can rotate and drive the hole adjustment mechanism (9), which can not only rotate and clean the impurities in the mesh, but also adjust the hole size according to the material processing volume and physical property changes.

2. The extraction and separation tower for preparing the anti-wear agent according to claim 1, characterized in that: The rotating impurity removal mechanism (8) includes a long rod (85) that moves through the middle of the tower body (1). A thick gear (81) is fixedly connected to the top of the long rod (85). A drive motor (86) is fixedly connected to the upper end of the tower body (1). A thin gear (82) is fixedly driven at the output end of the drive motor (86). The thick gear (81) and the thin gear (82) are meshed and connected.

3. The extraction and separation tower for preparing the anti-wear agent according to claim 2, characterized in that: The upper end of the long rod (85) is threadedly connected to a threaded sleeve (83), and the bottom of the threaded sleeve (83) is slidably connected to several iron columns (88). The bottom of the iron columns (88) is clamped with an electromagnet (84), and the bottom of the electromagnet (84) is fixed to the tower body (1).

4. The extraction and separation tower for preparing the anti-wear agent according to claim 2, characterized in that: A concave stop block (87) is slidably connected to the long rod (85). The outer wall of the concave stop block (87) is fixed to the inside of the tower body (1). The concave part of the concave stop block (87) is fixedly connected to the heavy liquid outlet (7).

5. The extraction and separation tower for preparing the anti-wear agent according to claim 2, characterized in that: The hole adjustment mechanism (9) includes several adjustment plates (92) and a limiting ring (93), both of which are fixedly connected to the long rod (85) at equal intervals.

6. The extraction and separation tower for preparing the anti-wear agent according to claim 5, characterized in that: Both the adjusting plate (92) and the limiting ring (93) are provided with a sieve plate (91) in the middle, and the sieve plate (91) is rotatably connected to the long rod (85).

7. The extraction and separation tower for preparing the anti-wear agent according to claim 6, characterized in that: The sieve plate (91) is configured as an elliptical cover with a raised top, and the adjusting plate (92) is configured in the shape of a hat.

8. The extraction and separation tower for preparing the anti-wear agent according to claim 6, characterized in that: The top of the sieve plate (91) and the entire adjusting plate (92) are provided with a number of mesh holes, and the mesh holes of the sieve plate (91) and the adjusting plate (92) are arranged alternately.

9. The extraction and separation tower for preparing the anti-wear agent according to claim 6, characterized in that: A pair of sliding grooves (96) are provided on both sides of the sieve plate (91), and a slider (95) is slidably connected in each of the sliding grooves (96). The outer side of the slider (95) is fixed to the inner cavity of the tower body (1).

10. The extraction and separation tower for preparing the anti-wear agent according to claim 6, characterized in that: The sieve plate (91) below has a vertical groove (94) on its side wall, and the sieve plate (91) is connected to the light liquid inlet (5) through the vertical groove (94).

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