Flow guiding device and fractionating column

Abstract

This invention relates to the field of fractionation tower technology, specifically disclosing a flow guiding device and a fractionation tower. The flow guiding device includes a flow guide plate, a scraping assembly, a cleaning assembly, and a driving assembly. The flow guide plate guides the material flow; the scraping assembly includes two scraping elements disposed on opposite sides of the flow guide plate, which can move towards or away from each other along the surface of the flow guide plate in a first direction to scrape away contaminants from the surface of the flow guide plate; the cleaning assembly includes two cleaning elements, which correspond one-to-one with the scraping elements and are configured to move along the scraping surface of the scraping elements during their movement to remove contaminants adhering to the scraping surface; the driving assembly drives the scraping elements and the cleaning elements to move. This flow guiding device reduces the risk of contaminant retention and coking blockage on the flow guide plate, ensuring the stability of the flow guiding function.

Description

Technical Field

[0001] This invention relates to the field of fractionation tower technology, and more particularly to a flow guiding device and a fractionation tower. Background Technology

[0002] In the separation of heavy aromatics (such as C9 and above aromatics), the fractionation column is a key piece of equipment. Due to the high boiling point of heavy components, they are prone to polymerization reactions, and certain areas within the column (such as the feed section and the column wall) are highly susceptible to coking and polymer deposition, i.e., fouling. Existing technologies often install fixed baffles in areas prone to fouling within the column to guide the flow of the material evenly or to scour the column wall, which can slow down the rate of fouling formation to some extent.

[0003] After prolonged use, the surface of the flow deflector will inevitably retain and gradually accumulate heavy components and polymers (usually viscous liquids) from the process medium, forming a scale layer. The appearance of the scale layer not only weakens the original flow guiding effect of the flow deflector, greatly reducing its anti-scaling effect, but the flow deflector itself also becomes a new coking core. It not only fails to inhibit coking, but also exacerbates the risk of local material stagnation and blockage.

[0004] Therefore, there is an urgent need to propose a flow guiding device and a fractionation tower to solve the above-mentioned technical problems. Summary of the Invention

[0005] According to one aspect of the present invention, a flow guiding device is provided, which reduces the risk of dirt retention and coking blockage on the flow guiding plate and ensures the stability of the flow guiding function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A flow guiding device for a fractionation column, the flow guiding device comprising: A flow deflector, used to guide the flow of materials; The scraping assembly includes two scraping elements disposed on opposite sides of the guide plate. The two scraping elements are capable of moving towards or away from each other along the surface of the guide plate in a first direction to scrape off dirt from the surface of the guide plate. A cleaning assembly includes two cleaning components that correspond to and cooperate with the scraping component. The cleaning components are configured to move along the scraping surface of the scraping component during its movement to remove the dirt adhering to the scraping surface. A drive assembly for driving the movement of the scraper and the cleaning component.

[0007] Optionally, the cleaning component further includes: A connector, the two ends of which are slidably connected to the corresponding scraper, the connector being configured to slide relative to the two scrapers along a second direction during the movement of the two scrapers toward or away from each other, the second direction forming an angle with the first direction; An elastic element is provided, with one end connected to the end of the connector along the length of the connector, and the other end connected to the corresponding cleaning element, so that the cleaning element is pressed against the scraping surface.

[0008] Optionally, the deflector plate has a sewage discharge side, and the cleaning assembly further includes a V-shaped rotating plate. The V-shaped rotating plate includes a first side plate and a second side plate that are rotatably connected. The first side plate is rotatably connected to one of the cleaning components, and the second side plate is rotatably connected to another cleaning component. The apex of the V-shaped rotating plate is positioned towards the sewage discharge side. As the two cleaning components approach each other, the included angle between the first side plate and the second side plate decreases.

[0009] Optionally, the drain side of the deflector is provided with a collection box, which is disposed opposite to the cleaning component. The collection box includes a box body with an opening, and the cleaning component can push the dirt into the box body through the opening.

[0010] Optionally, the opening is provided with a lid, which is rotatably connected to the box body. The vertex of the V-shaped rotating plate can push the lid, causing the lid to rotate and open.

[0011] Optionally, the scraping element includes: A sliding plate is slidably mounted on the guide plate; A scraper is disposed on the slide plate, the scraping surface is located on the scraper, and the scraping surfaces of the two scrapers are arranged opposite each other.

[0012] Optionally, the guide plate is provided with a guide portion, the guide portion and the guide plate forming a guide channel, and the slide plate is slidably disposed within the guide channel.

[0013] Optionally, the scraper is provided with a sliding engagement portion, the extending direction of the sliding engagement portion forming an angle with the moving direction of the scraper, and the driving assembly includes: A driving component, wherein the output end of the driving component is provided with a first threaded segment and a second threaded segment with opposite directions of rotation; The first connecting rod has its middle part threadedly connected to the first threaded section, and its two ends are respectively slidably engaged with the sliding fit parts corresponding to the two scraping parts. The second connecting rod has its middle part threadedly connected to the second threaded section, and its two ends are respectively slidably engaged with the sliding fit parts corresponding to the two scraping parts; The first link and the second link are capable of rotating relative to each other to drive the two scraping elements to move towards or away from each other along the first direction.

[0014] Optionally, the sliding fit includes a groove, with a first slide rod at each end of the first connecting rod and a second slide rod at each end of the second connecting rod, and the first slide rod and the second slide rod are slidably disposed in the corresponding groove.

[0015] According to another aspect of the present invention, the present invention also provides a fractionation tower, comprising a tower body and a flow guiding device as described in any of the above technical solutions, wherein the tower body is provided with a feed inlet and the flow guiding device is disposed at the feed inlet.

[0016] The beneficial effects of this invention are: This invention provides a flow guiding device, including a flow guiding plate, a scraping assembly, and a cleaning assembly. When a large amount of dirt accumulates on the surface of the flow guiding plate, a drive assembly is activated, driving two scraping elements in the scraping assembly to move towards each other from opposite ends of the flow guiding plate, scraping away the dirt on the surface. Simultaneously, the drive assembly drives a cleaning element in the cleaning assembly to move along the scraping surface of the scraping elements, thereby cleaning the dirt adhering to the scraping surface. After cleaning, the two scraping elements can move away from each other towards the ends of the flow guiding plate, allowing the flow guiding plate to function normally in guiding the material. The surface of the flow guiding plate can maintain a relatively clean state, making it less likely to become a new coking nucleus, thus maintaining the guiding effect of the flow guiding plate on the material. This allows the material to flush the target area, slowing down the formation rate of scale in that area, while the cleaning element simultaneously removes the adhering substances on the scraping surface, enabling the scraping elements to maintain stable scraping ability and preventing them from becoming new coking nuclei. This flow guiding device, while maintaining the flow guiding function of the guide plate, improves the sustainability and reliability of dirt removal, reduces the risk of material stagnation and coking blockage on the surface of the guide plate, reduces the frequency of tower shutdown and cleaning, and improves the long-term reliability of the fractionation tower.

[0017] Compared to a single scraper that removes contaminants unidirectionally from one end of the baffle plate to the other, using two scrapers that scrape and push contaminants from opposite ends of the baffle plate towards the center shortens the scraping stroke of a single scraper, improving efficiency. It also concentrates contaminants in the middle area of ​​the baffle plate for easier collection later. Furthermore, it ensures even force distribution on the baffle plate and drive assembly, improving smoother movement. The two cleaning components work in a one-to-one correspondence with the two scrapers, targeting specific areas on the scraped surface, reducing blind spots and improving the timeliness of cleaning.

[0018] This invention provides a fractionation tower, including a tower body and the aforementioned flow guiding device. Due to the use of the aforementioned flow guiding device, the fractionation tower alleviates fouling within the tower body, reduces the frequency of tower shutdowns for cleaning, and exhibits high reliability during long-term operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a distillation tower provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection structure between the flow guiding device and the feed inlet provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the top structure of the flow guiding device provided in an embodiment of the present invention; Figure 4 A partial structural schematic diagram of the cleaning component provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the collection box provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the bottom structure of the flow guiding device (with the flow guiding plate hidden) provided in an embodiment of the present invention.

[0020] In the picture: 10. Flow guiding device; 20. Feed inlet; 30. Tower body; 40. Fixing rod; 41. Support component; 100. Deflector plate; 110. Guide section; 120. Sewage discharge side; 200. Scraping assembly; 210. Scraping component; 211. Scraping surface; 212. Slide plate; 2121. Inclined groove; 213. Scraper; 220. Sliding mating part; 221. Slide groove; 300. Cleaning component; 310. Cleaning part; 320. Connector; 321. Roller; 322. Limiting groove; 330. Elastic element; 340. V-shaped rotating plate; 341. First side plate; 342. Second side plate; 343. Vertex; 400. Collection box; 410. Box body; 420. Opening; 430. Box lid; 431. Push rod; 500, Drive assembly; 510, Output end; 520, First connecting rod; 521, First slide bar; 530, Second connecting rod; 531, Second slide bar. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0025] In this invention, "multiple" refers to two or more (including two).

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] Example 1 See Figures 1-3 This embodiment provides a flow guiding device 10, which reduces the risk of dirt retention and coking blockage on the flow guiding plate 100 and ensures the stability of the flow guiding function.

[0028] The flow guiding device 10 is used in a fractionation tower. The flow guiding device 10 includes a guide plate 100, a scraping assembly 200, and a cleaning assembly 300. The guide plate 100 guides the material flow. The scraping assembly 200 includes two scraping elements 210 disposed on opposite sides of the guide plate 100. The two scraping elements 210 are movable in opposite directions or in opposite directions along the surface of the guide plate 100 to scrape away contaminants from the surface of the guide plate 100. The cleaning assembly 300 includes two cleaning elements 310, which correspond one-to-one with the scraping elements 210. The cleaning elements 310 are configured to move along the scraping surface 211 of the scraping elements 210 during their movement to remove contaminants adhering to the scraping surface 211. A drive assembly 500 drives the scraping elements 210 and the cleaning elements 310.

[0029] When the guide plate 100 is working normally, it can change the flow direction and distribution of the material, guide the material to flow evenly, or flush the target area in the tower that is prone to coking, thereby slowing down the formation rate of fouling in that area. When a large amount of dirt is deposited on the surface of the guide plate 100, the drive assembly 500 is activated, causing the two scraping elements 210 in the scraping assembly 200 to move towards each other from opposite ends of the guide plate 100, scraping away the dirt on the surface of the guide plate 100. At the same time, the drive assembly 500 drives the cleaning element 310 in the cleaning assembly 300 to move along the scraping surface 211 of the scraping element 210, thereby cleaning the dirt attached to the scraping surface 211. After cleaning, the two scraping elements 210 can move back and forth to both ends of the guide plate 100, so that the guide plate 100 can normally guide the material. The surface of the guide plate 100 can maintain a relatively clean state, making it less likely to become a new coking nucleus. This maintains the guiding effect of the guide plate 100 on the material, allowing the material to flush the target area and slowing down the formation rate of scale in that area. Simultaneously, the cleaning block removes the deposits on the scraping surface 211, ensuring that the scraping element 210 maintains stable scraping ability and preventing it from becoming a new coking nucleus. This guiding device 10, while maintaining the guiding function of the guide plate 100, improves the sustainability and reliability of contaminant removal, reduces the risk of material stagnation and coking blockage on the surface of the guide plate 100, lowers the frequency of tower shutdowns for cleaning, and improves the long-term operational reliability of the fractionation tower.

[0030] Compared to a scheme that uses only one scraper 210 to scrape dirt unidirectionally from one end of the guide plate 100 to the other, using two scraper 210s to scrape and push dirt from opposite ends of the guide plate 100 towards the middle not only shortens the scraping stroke of a single scraper 210, improving the efficiency of dirt removal, but also collects dirt in the middle area of ​​the guide plate 100 for easy subsequent collection. Furthermore, it ensures even force distribution on the guide plate 100 and the drive assembly 500, improving motion stability. The two cleaning components 310 correspond one-to-one with the two scraper 210, providing targeted cleaning of the scraping surface 211, reducing blind spots and improving the timeliness of cleaning the scraping surface 211.

[0031] It is understood that in this embodiment, the material is a gas-liquid two-phase flow containing heavy aromatic hydrocarbons (C9 and above aromatic hydrocarbons).

[0032] Optionally, see Figure 2 and Figure 3 In one possible embodiment, the scraping element 210 includes a sliding plate 212 and a scraper 213. The sliding plate 212 is slidably disposed on the guide plate 100. The scraper 213 is disposed on the sliding plate 212, with a scraping surface 211 located on the scraper 213, and the scraping surfaces 211 of the two scrapers 213 are arranged opposite to each other. The sliding plate 212 provides support for the scraper 213 and is slidably connected to the guide plate 100, which helps to improve the stability of the scraper 213's movement. When the two scrapers 213 move towards each other, they can scrape and collect dirt from the surface of the guide plate 100 from opposite sides, improving the efficiency of removing dirt from the surface of the guide plate 100.

[0033] Optionally, see [link to relevant documentation] Figure 2 and Figure 3 In one possible embodiment, the guide plate 100 is provided with a guide portion 110, which, together with the guide plate 100, forms a guide channel. The slide plate 212 is slidably disposed within the guide channel. The guide channel can restrict the movement path of the slide plate 212, enabling it to slide linearly and stably along the extension direction of the channel during movement. Consequently, the scraper 213 can also move stably, improving the reliability of the scraper 213 in removing dirt and reducing the problem of insufficient scraping caused by the unstable movement of the slide plate 212.

[0034] Optionally, see Figure 3 and Figure 4In one possible embodiment, the cleaning assembly 300 further includes a connector 320 and an elastic member 330. The two ends of the connector 320 are slidably connected to corresponding scrapers 210. The connector 320 is configured to slide relative to the two scrapers 210 along a second direction during their relative or opposite movements, the second direction forming an angle with the first direction. The elastic member 330 is along the length of the connector 320, with one end connected to the end of the connector 320 and the other end connected to the corresponding cleaning member 310, so that the cleaning member 310 is pressed against the scraping surface 211. By connecting the cleaning member 310 to the connector 320 via the elastic member 330, during the movement of the two scrapers 210 along the first direction, the connector 320 slides relative to the two scrapers 210, causing the two cleaning members 310 to slide tightly against the scraping surface 211, improving the synchronicity and cleaning effect of the two cleaning members 310.

[0035] Preferably, in this embodiment, the second direction is perpendicular to the first direction.

[0036] Further optional, see Figure 3 and Figure 4 In one possible embodiment, the slide plate 212 has a groove 2121, the extension direction of the groove 2121 is inclined to the movement direction of the slide plate 212 (i.e., the first direction), and the two grooves 2121 are symmetrically arranged about the center line of the guide plate 100, the center line of the guide plate 100 extends along the second direction. The two ends of the connector 320 are respectively slidably disposed in the corresponding grooves 2121.

[0037] Specifically, the two ends of the connector 320 are initially located at the ends of the inclined grooves 2121 that are close to each other. As the two slide plates 212 move towards each other, the two inclined grooves 2121 move closer to each other along the direction of movement of the slide plates 212. The two ends of the connector 320 are simultaneously constrained by the groove walls of the corresponding inclined grooves 2121. Under the common guidance of the two symmetrical inclined grooves 2121, they slide along the extension direction of the corresponding inclined grooves 2121 respectively. Since the displacement components of the two ends in the first direction cancel each other out or are restricted, while the displacement components in the second direction remain consistent, the connector 320 moves as a whole relative to the two slide plates 212 in the second direction. The cleaning member 310 presses against the scraping surface 211, overcoming the elastic force of the elastic member 330 and moving with the scraping surface 211 in the first direction, while also moving with the connector 320 in the second direction. Thus, the opposing movement of the two slide plates 212 simultaneously completes two actions: the scraper 213 cleaning the surface of the guide plate 100 and the cleaning component 310 cleaning the scraping surface 211 of the scraper 213. The scraping action and the cleaning action are carried out in coordination, which improves the cleaning efficiency, the online self-cleaning capability of the guide device 10 and the long-term operational reliability.

[0038] Further, optionally, see also Figure 3 and Figure 4 In one possible embodiment, rollers 321 are provided at both ends of the connector 320. The rollers 321 are engaged in the inclined groove 2121 and can roll within the inclined groove 2121. This arrangement transforms the sliding friction between the connector 320 and the inclined groove 2121 into rolling friction, reducing motion resistance and making the movement of the connector 320 smoother and more stable. It also reduces the risk of jamming and improves the long-term reliability of the connector 320.

[0039] Further optional, see Figure 4 In one possible embodiment, the connector 320 is provided with a limiting groove 322, and the elastic member 330 is disposed within the limiting groove 322. This arrangement restricts the elastic member 330 from extending or retracting along its length, preventing it from shifting or dislodging during movement with the connector 320. Simultaneously, it protects the elastic member 330 from direct exposure to dirt, reducing the risk of dirt adhering to the elastic member 330 and causing it to lose its elasticity.

[0040] Optionally, see Figure 3 and Figure 4 In one possible embodiment, the deflector 100 has a drain side 120, and the cleaning assembly 300 further includes a V-shaped rotating plate 340. The V-shaped rotating plate 340 includes a first side plate 341 and a second side plate 342 rotatably connected. The first side plate 341 is rotatably connected to a cleaning component 310, and the second side plate 342 is rotatably connected to another cleaning component 310. The apex 343 of the V-shaped rotating plate 340 is positioned toward the drain side 120. As the two cleaning components 310 approach each other, the included angle between the first side plate 341 and the second side plate 342 decreases. With this configuration, on the one hand, the V-shaped rotating plate 340 can adapt to changes in the distance between the two cleaning components 310, avoiding rigid interference between the two cleaning components 310 and the V-shaped rotating plate 340 when they approach each other, so that the cleaning components 310 can move continuously and stably along the scraping surface 211 of the corresponding scraper 210; on the other hand, as the connecting member 320 drives the cleaning components 310 and the V-shaped rotating plate 340 to move in the second direction, and at the same time, as the included angle of the V-shaped rotating plate 340 decreases, the apex 343 of the V-shaped rotating plate 340 moves toward the sewage discharge side 120, thereby further pushing the dirt scraped and pushed to the middle of the guide plate 100 by the scraper 210 toward the sewage discharge side 120, reducing the dirt residue on the surface of the guide plate 100, and keeping the guide plate 100 in a better guiding state.

[0041] Preferably, miniature needle roller bearings are provided at the rotatable connection between the first side plate 341 and one cleaning component 310, and at the rotatable connection between the second side plate 342 and another cleaning component 310. Miniature needle roller bearings can reduce rotational friction at the rotatable connection points and improve rotational smoothness.

[0042] Optionally, see Figure 3 and Figure 5 In one possible embodiment, the drain side 120 of the baffle plate 100 is provided with a collection box 400, which is disposed opposite to the cleaning component 300. The collection box 400 includes a box body 410 with an opening 420, and the cleaning component 300 can push the dirt into the box body 410 through the opening 420. By providing a collection box 400 on the drain side 120 of the baffle plate 100, a centralized collection location can be provided for the dirt cleaned by the scraper 210 and the cleaning component 300, which facilitates subsequent cleaning and reduces the risk of dirt re-forming into a scale layer, coking core, or local blockage point in the fractionation tower.

[0043] Further optional, see Figure 2 and Figure 3 In this embodiment, the guide plate 100 is inclined, and the drain side 120 of the guide plate 100 is lower. This arrangement has two advantages: firstly, the inclined guide plate 100 conforms to fluid mechanics, which is conducive to guiding materials smoothly into the tower; secondly, the V-shaped rotating plate 340 pushes the sludge towards the lower drain side 120, and its movement direction combined with the sludge's own gravity makes the scraping and collection process smoother and more thorough, especially suitable for viscous or solid deposits produced by the polymerization and coking of heavy aromatics.

[0044] Optionally, see Figure 3 and Figure 5 In one possible embodiment, a lid 430 is provided at the opening 420. The lid 430 is rotatably connected to the box body 410. The apex 343 of the V-shaped rotating plate 340 can push the lid 430, causing the lid 430 to rotate and open. The collection box 400 remains in a relatively closed state when not collecting, which does not affect the flow guide plate 100 in guiding the material, and at the same time reduces the possibility of the collected dirt in the box body 410 being re-exposed to the tower environment. The V-shaped rotating plate 340 not only connects the two cleaning components 310 to form an adaptive angle that stably fits the scraping surface 211, but also acts as a trigger to open the lid 430 at the cleaning end. When the apex 343 of the V-shaped rotating plate 340 moves with the cleaning component 310 to abut the lid 430, it can push the lid 430 to rotate and open. This achieves a chain cleaning effect where the scraping component 210 cleans the guide plate 100, the cleaning block cleans the scraping surface 211, and the V-shaped rotating plate 340 pushes the dirt and opens the lid 430 to push the dirt into the box 410.

[0045] Further, optionally, see also Figure 3 and Figure 5 In one possible embodiment, the lid 430 is provided with a push rod 431, and the apex 343 of the V-shaped rotating plate 340 can abut against the push rod 431 and push the push rod 431 so that the push rod 431 drives the lid 430 to rotate and open. The push rod 431 can provide a more precise and easier-to-access trigger position for the V-shaped rotating plate 340, improving the accuracy and reliability of the V-shaped rotating plate 340 opening the lid.

[0046] Alternatively, in one possible embodiment, when the V-shaped rotating plate 340 moves away from the lid 430, the lid 430 can automatically fall back to cover the opening 420 under the action of gravity. This configuration is simple in structure and achieves airtight collection of waste. The opening action of the lid 430 can be directly achieved by the movement of the V-shaped rotating plate 340, without the need for an additional independent opening drive or complex control structure.

[0047] Preferably, the maximum opening angle of the lid 430 relative to the opening 420 is in the range of 30~60°, so that the lid 430 can close under its own weight.

[0048] Optionally, see Figure 6 In one possible embodiment, the scraper 210 is provided with a sliding engagement portion 220, the extension direction of which forms an angle with the moving direction of the scraper 210. The drive assembly 500 includes a drive member, a first connecting rod 520, and a second connecting rod 530. The output end 510 of the drive member is provided with a first threaded section and a second threaded section with opposite directions of rotation. The middle part of the first connecting rod 520 is threadedly connected to the first threaded section, and the two ends of the first connecting rod 520 are respectively slidably engaged with the sliding engagement portions 220 corresponding to the two scrapers 210. The middle part of the second connecting rod 530 is threadedly connected to the second threaded section, and the two ends of the second connecting rod 530 are respectively slidably engaged with the sliding engagement portions 220 corresponding to the two scrapers 210. The first connecting rod 520 and the second connecting rod 530 can rotate relative to each other to drive the two scrapers 210 to move towards or away from each other along a first direction.

[0049] To facilitate understanding, the movement process of the driving component driving the two scraping components 210 is briefly described below: When the guide plate 100 needs cleaning, the drive unit is activated. Since the first connecting rod 520 and the second connecting rod 530 are threaded to threaded sections with opposite directions of rotation, the output end 510 rotates, causing the first connecting rod 520 and the second connecting rod 530 to rotate synchronously in opposite directions. Both ends of the first connecting rod 520 and the second connecting rod 530 slide along the corresponding sliding fit part 220 and apply a pushing action to the scraper 210, converting the relative rotation of the connecting rods into linear motion of the scraper 210 along the surface of the guide plate 100 in a first direction, either towards or away from each other. When the two scrapers 210 move towards each other, they can scrape off the dirt on the surface of the guide plate 100 and push it to the middle of the guide plate 100; when the two scrapers 210 move away from each other, they can reset, preparing for the next scraping action.

[0050] With this configuration, one driving component can drive both scraping components 210 to move together, allowing them to move synchronously towards each other or away from each other, thus improving the synchronicity and stability of their movement. By setting the first connecting rod 520 and the second connecting rod to drive both scraping components 210 together, the uniformity of the force on the scraping components 210 is improved.

[0051] It is understood that the drive unit can be, but is not limited to, an explosion-proof motor. Explosion-proof motors are particularly suitable for the flow guiding device 10 applied to the fractionation tower in this embodiment, ensuring the safety of personnel and equipment.

[0052] Optionally, see [link to relevant documentation] Figure 5 In one possible embodiment, the sliding engagement portion 220 includes a groove 221. Both ends of the first connecting rod 520 are provided with first sliding rods 521, and both ends of the second connecting rod 530 are provided with second sliding rods 531. The first and second sliding rods 521 are slidably disposed within their respective grooves 221. Through the sliding engagement of the first and second sliding rods 521 with the grooves 221, the ends of the first and second connecting rods 520 and 530 can rotate relative to the grooves 221 during sliding. This compensates for positional and angular changes at the ends of the first and second connecting rods 520 and 530 during the linear displacement of the first and second connecting rods 520 and 530 as they transmit rotational motion to the scraper 210, improving the smoothness of movement of the first and second connecting rods 520 and 530 and reducing motion interference and jamming.

[0053] It is worth noting that during the rotation of the first connecting rod 520 and the second connecting rod 530 driven by the output shaft of the drive component, the first connecting rod 520 and the second connecting rod 530 will also be displaced along the axial direction of the output shaft. To solve the above problem, preferably, the pitch of the first threaded section and the second threaded section is in the range of 2~4mm, so as to control the axial movement speed of the first connecting rod 520 and the second connecting rod 530, prevent the first slide rod 521 and the second slide rod 531 from disengaging from the slide groove 221, and improve the drive reliability.

[0054] Optionally, in one possible embodiment, dustproof rings are fitted around the outer periphery of both the first slide rod 521 and the second slide rod 531, and the dustproof rings are sealed to the groove wall of the slide groove 221. The dustproof rings can prevent tiny particles from entering the sliding gap between the first slide rod 521, the second slide rod 531 and the slide groove 221, ensuring smooth sliding.

[0055] It is worth noting that, to ensure long-term durability in heavy aromatic hydrocarbon environments, all components in contact with or near the process media are preferably made of special materials: Preferably, the scraper 213 body is made of 316L stainless steel, and the cutting edge part that contacts the guide plate 100 is inlaid or welded with tungsten carbide hard alloy strips to have extremely high hardness, wear resistance and chemical inertness.

[0056] Preferably, the slide plate 212 and the connector 320, as the main load-bearing and transmission structural components, are made of 310S heat-resistant stainless steel or Incoloy 800H high-temperature alloy to ensure strength and creep resistance at operating temperatures.

[0057] Preferably, the cleaning component 310 is made of graphite-filled polytetrafluoroethylene composite material or special alumina ceramic block. Both of these materials have excellent self-lubricating properties, chemical corrosion resistance and a certain degree of elasticity, which can reduce wear on the scraper 213 while effectively scraping.

[0058] Preferably, the elastic element 330 is made of flexible graphite braided rope covered with a polytetrafluoroethylene sheath. The elastic element 330 made of this material has an initial elastic modulus of k=50~150 N / m at room temperature, and can still maintain an elastic recovery capacity of k≥30 N / m at the working temperature (≤350℃). The clamping force applied by the cleaning element 310 to the surface of the scraper 213 through the elastic element 330 is 5~15N, which can adapt to the uneven microstructure of the scraping surface 211 of the scraper 213, ensuring that the cleaning element 310 fits the scraping surface 211 without generating excessive frictional resistance. The two ends of the elastic element 330 are fixed in the limiting groove 322 by adjustable screws. During installation, it can be pre-stretched by 10%~20% of its length to compensate for the relaxation effect at high temperature.

[0059] Preferably, the V-shaped rotating plate 340 is made of integrally machined 316L stainless steel or Hastelloy C-276 plate, and its vertex 343 is designed with an obtuse angle and polished to reduce the risk of dirt accumulation and jamming.

[0060] Preferably, the dynamic seal (i.e., between the output shaft of the drive component and the guide plate 100) adopts a spring-pressurized flexible graphite stuffing box or a metal bellows mechanical seal, and the static seal (i.e. at the opening 420 of the collection box 400) adopts a spiral wound stainless steel strip and a flexible graphite gasket.

[0061] Example 2 See Figure 1 This embodiment provides a fractionation tower, including a tower body 30 and a flow guiding device 10 as described in Embodiment 1. The tower body 30 is provided with a feed inlet 20, and the flow guiding device 10 is disposed at the feed inlet 20. Due to the use of the flow guiding device 10 as described in Embodiment 1, the fractionation tower alleviates the fouling phenomenon inside the tower body 30, reduces the frequency of tower shutdown and cleaning, and has high reliability in long-term operation.

[0062] Optionally, see [link to relevant documentation] Figure 1 In one possible embodiment, a fixing rod 40 is provided on the outer periphery of the feed inlet 20, and one end of the support member 41 is connected to the fixing rod 40, while the other end is connected to the guide plate 100. The fixing rod 40 and the support member 41 constitute a stable cantilever support structure, which improves the stability of the guide plate 100.

[0063] Alternatively, in one possible embodiment, the drive assembly 500 is disposed at the bottom of the guide plate 100, and the bottom surface of the guide plate 100 is covered with a heat insulation layer. The heat insulation layer can effectively block the heat radiation of the high-temperature material flowing through the guide plate 100 to the drive assembly 500 at the bottom, protect important components such as the motor, and extend their service life.

[0064] Preferably, the dynamic sealing joints between the guide plate 100 and the support member 41, and between the support member 41 and the fixing rod 40, are made of spiral-wound stainless steel strip and flexible graphite gasket.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A flow guiding device for a fractionating column, characterized in that The flow guiding device (10) includes: A flow deflector (100) is used to guide the flow of materials; The scraping assembly (200) includes two scraping elements (210) disposed on opposite sides of the guide plate (100). The two scraping elements (210) are capable of moving towards or away from each other along the surface of the guide plate (100) in a first direction to scrape off dirt from the surface of the guide plate (100). A cleaning assembly (300) includes two cleaning elements (310) that correspond one-to-one with the scraping element (210). The cleaning element (310) is configured to move along the scraping surface (211) of the scraping element (210) during the movement of the scraping element (210) to remove the dirt attached to the scraping surface (211). A drive assembly (500) is used to drive the scraper (210) and the cleaning component (310) to move.

2. The flow directing device of claim 1, wherein, The cleaning component (300) also includes: A connector (320) is provided, the two ends of which are slidably connected to the corresponding scraper (210). The connector (320) is configured to slide relative to the two scrapers (210) in a second direction during the movement of the two scrapers (210) towards or away from each other. The second direction forms an angle with the first direction. An elastic element (330) is connected at one end to the end of the connector (320) along the length direction of the connector (320), and at the other end to the corresponding cleaning element (310) so that the cleaning element (310) abuts against the scraping surface (211).

3. The flow directing device of claim 2, wherein, The guide plate (100) has a sewage discharge side (120), and the cleaning assembly (300) further includes a V-shaped rotating plate (340). The V-shaped rotating plate (340) includes a first side plate (341) and a second side plate (342) rotatably connected. The first side plate (341) is rotatably connected to one of the cleaning components (310), and the second side plate (342) is rotatably connected to another cleaning component (310). The apex (343) of the V-shaped rotating plate (340) is set towards the sewage discharge side (120). As the two cleaning components (310) approach each other, the included angle between the first side plate (341) and the second side plate (342) decreases.

4. The flow directing device of claim 3, wherein, The drain side (120) of the guide plate (100) is provided with a collection box (400), the collection box (400) is disposed opposite to the cleaning component (300), the collection box (400) includes a box body (410) with an opening (420), and the cleaning component (300) can push the dirt into the box body (410) through the opening (420).

5. The flow directing device of claim 4, wherein, A lid (430) is provided at the opening (420). The lid (430) is rotatably connected to the box body (410). The vertex (343) of the V-shaped rotating plate (340) can push the lid (430) to rotate and open.

6. The flow directing device of any one of claims 1-5, wherein, The scraping element (210) includes: The slide plate (212) is slidably disposed on the guide plate (100); A scraper (213) is disposed on the slide plate (212), and the scraping surface (211) is located on the scraper (213). The scraping surfaces (211) of the two scrapers (213) are disposed opposite to each other.

7. The flow directing device of claim 6, wherein, The guide plate (100) is provided with a guide part (110), the guide part (110) and the guide plate (100) form a guide channel, and the slide plate (212) is slidably disposed in the guide channel.

8. The flow directing device of any one of claims 1-5, wherein, The scraper (210) is provided with a sliding engagement portion (220), the extending direction of the sliding engagement portion (220) is at an angle to the moving direction of the scraper (210), and the driving assembly (500) includes: The drive unit has a first threaded section and a second threaded section with opposite directions of rotation at its output end (510). The first connecting rod (520) is threaded to the first threaded section at its middle part, and the two ends of the first connecting rod (520) are respectively slidably engaged with the sliding fit parts (220) corresponding to the two scraping parts (210); The second connecting rod (530) has its middle part threadedly connected to the second threaded section, and its two ends are respectively slidably engaged with the sliding fit parts (220) corresponding to the two scraping parts (210); The first link (520) and the second link (530) are capable of rotating relative to each other to drive the two scraping elements (210) to move toward or away from each other along the first direction.

9. The flow guiding device according to claim 8, characterized in that, The sliding mating part (220) includes a sliding groove (221). Both ends of the first connecting rod (520) are provided with a first sliding rod (521), and both ends of the second connecting rod (530) are provided with a second sliding rod (531). The first sliding rod (521) and the second sliding rod (531) are slidably disposed in the corresponding sliding groove (221).

10. A fractionation tower, characterized in that, It includes a tower body (30) and a flow guiding device (10) as described in any one of claims 1-9, wherein the tower body (30) is provided with a feed inlet (20) and the flow guiding device (10) is disposed at the feed inlet (20).

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