A flow guide stator for extraction

Abstract

The utility model discloses an extraction is with the diversion stator belongs to chemical engineering separation engineering technical field, this diversion stator includes the casing, and the casing is fixedly connected with the annular baffle, and the annular baffle is sealed with the extraction tower body inner wall cooperation, and the upper and lower ends of annular baffle gather heavy phase fluid and light phase fluid respectively, and the casing is equipped with a plurality of independent heavy phase flow channel and light phase flow channel, and the heavy phase fluid of annular baffle upper end flows down through the starting end of heavy phase flow channel, and evenly distributes to whole tower cross section from the end of heavy phase flow channel, and the light phase fluid of annular baffle lower end flows up through the starting end of light phase flow channel, and evenly distributes to whole tower cross section from the end of light phase flow channel, and the design of double flow channel realizes the effective separation and directional diversion of two phase fluid. The utility model can rectify the disorder eddy current produced by stirring into the order axial flow, and the back mixing is inhibited significantly, and the liquid is forced to distribute evenly through the uniform flow channel, and the " channel flow " is avoided, and the mass transfer interface is greatly increased.

Description

Technical Field

[0001] This utility model belongs to the field of chemical separation engineering technology, and in particular relates to a flow guide stator for extraction. Background Technology

[0002] Extraction columns are separation devices widely used in chemical, pharmaceutical, and hydrometallurgical industries. Their efficiency is highly dependent on the contact conditions between the two-phase fluids (usually a heavy phase and a light phase) within the column. Ideal contact conditions require the two-phase fluids to be uniformly distributed across the entire cross-section of the column and to achieve stable and sufficient countercurrent contact to avoid adverse phenomena such as channeling and backmixing, thereby improving mass transfer efficiency.

[0003] In existing extraction columns (such as rotary disc columns and pulse sieve plate columns), multiple cascaded stators or sieve plates are typically installed inside the column. Their main function is to cut the fluid, suppress axial backmixing, and promote two-phase dispersion. However, the traditional stator structure has some inherent drawbacks: (1) Severe backmixing of fluids: In traditional extraction towers, the strong eddies and circulation generated by mechanical stirring cause the light and heavy phase fluids to mix in the countercurrent contact process. Fluid micro-elements with different residence times intersect each other, which leads to intensified axial diffusion and significantly reduces the concentration gradient driving force required for the mass transfer process. (2) Low mass transfer efficiency: The lack of an effective fluid distribution mechanism inside the equipment causes most of the fluid to pass through in the form of "channeling", forming a flow dead zone; at the same time, disordered flow causes the size distribution of dispersed phase droplets to run out of control. Excessively large droplets reduce the specific surface area for mass transfer, while excessively small droplets are easily entrained, ultimately resulting in insufficient contact between the two phases and a significant reduction in the mass transfer interface area. (3) Flooding is likely to occur: When the throughput increases, the traditional structure cannot effectively control the aggregation and redispersion process of droplets, resulting in a sharp increase in the amount of dispersed phase retained, a sudden increase in flow resistance, and the occurrence of phase reversal or a large amount of entrainment, which disrupts normal operation and makes the operating range extremely narrow.

[0004] Therefore, there is an urgent need to design a flow guide stator for extraction to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a flow guide stator for extraction, which has the advantages of efficient separation and guidance of heavy phase fluids and light phase fluids, and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the specific technical solution of the extraction flow guide stator of this utility model is as follows: An extraction flow guide stator includes a shell with an annular baffle fixedly connected to it. The annular baffle is sealed to the inner wall of the extraction column. Heavy phase fluid and light phase fluid are collected at the upper and lower ends of the annular baffle, respectively. The shell is provided with multiple independent heavy phase channels and light phase channels. The starting end of the heavy phase channel is located above the annular baffle, and the ending end of the heavy phase channel is located at the bottom of the shell. The heavy phase fluid at the upper end of the annular baffle flows downward through the starting end of the heavy phase channel and flows out from the ending end of the heavy phase channel, which is evenly distributed to the entire column cross-section. The starting end of the light phase channel is located below the annular baffle, and the ending end of the light phase channel is located at the top of the shell. The light phase fluid at the lower end of the annular baffle flows upward through the starting end of the light phase channel and flows out from the ending end of the light phase channel, which is evenly distributed to the entire column cross-section.

[0007] Furthermore, each heavy phase channel is located between two adjacent light phase channels, and each light phase channel is located between two adjacent heavy phase channels.

[0008] Furthermore, the shell is provided with a guide heavy phase inlet and a guide heavy phase outlet. The guide heavy phase inlet is connected to the beginning end of the heavy phase flow channel, and the guide heavy phase outlet is connected to the end end of the heavy phase flow channel. The heavy phase fluid at the upper end of the annular baffle enters the heavy phase flow channel through the guide heavy phase inlet and flows downward, and flows out from the guide heavy phase outlet and is evenly distributed to the entire tower cross section.

[0009] Furthermore, the heavy phase inlet is located above the annular partition, and the heavy phase outlet is located at the bottom of the casing.

[0010] Furthermore, the shell is provided with a light phase inlet and a light phase outlet. The light phase inlet is connected to the beginning of the light phase flow channel, and the light phase outlet is connected to the end of the light phase flow channel. The light phase fluid at the lower end of the annular baffle enters the light phase flow channel through the light phase inlet and flows upward, and flows out from the light phase outlet and is evenly distributed to the entire tower cross section.

[0011] Furthermore, the light phase inlet is located below the annular baffle, and the light phase outlet is located at the top of the housing.

[0012] Furthermore, the shell includes an inner cylinder section, an outer cylinder section, and two second cover plates. The inner cylinder section and the outer cylinder section are located on the same axis. The two ends of the inner cylinder section and the outer cylinder section are fixedly connected by the two second cover plates. The outer cylinder section, the inner cylinder section, and the two second cover plates form an internal cavity.

[0013] Furthermore, multiple flow channel baffles are fixedly connected inside the internal cavity, which divide the internal cavity into multiple independent heavy phase flow channels and light phase flow channels.

[0014] Furthermore, the second cover plate includes a first cover section, a second cover section, and a flange. The first cover section and the second cover section are fixedly connected by the flange. The end of the first cover section away from the flange is fixedly connected to the inner cylinder section, and the end of the second cover section away from the flange is fixedly connected to the outer cylinder section.

[0015] Furthermore, the starting ends of both the heavy phase flow channel and the light phase flow channel are located on the outer cylinder section, while the ending ends of both the heavy phase flow channel and the light phase flow channel are located on the first cover section.

[0016] Furthermore, the ratio of the flow area of ​​the light phase outlet to the flow area of ​​the heavy phase outlet is approximately equal to the ratio of the volumetric flow rate of the light phase fluid to the volumetric flow rate of the heavy phase fluid.

[0017] This invention has the following advantages: the flow guide stator can rectify the disordered eddies generated by stirring into an ordered axial flow, significantly suppressing backmixing; the uniformly distributed flow channels force the liquid to be evenly distributed, avoiding "channeling" and greatly increasing the mass transfer interface; the uniformly distributed flow channels provide space for the dispersion phase droplets to coalesce, which helps to maintain a stable droplet size distribution, widens the operating range, and effectively delays flooding; moreover, the flow guide stator has a stable structure and internal support function, making it suitable for efficient liquid-liquid extraction processes. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the current guiding stator of this utility model; Figure 2 This is a top view of the flow guide stator of this utility model; Figure 3 This is a bottom view of the flow guide stator structure of this utility model; Figure 4 This is a schematic cross-sectional view of the current-guiding stator of this utility model.

[0019] Explanation of markings in the diagram: 2. Guide stator; 21. Shell; 211. Outer cylinder section; 212. Inner cylinder section; 213. Second cover plate; 2131. Second cover section; 2132. Flange; 2133. First cover section; 22. Annular baffle; 23. Guide heavy phase inlet; 231. Guide light phase inlet; 232. Guide heavy phase outlet; 233. Guide light phase outlet; 24. Flow channel baffle; 241. Light phase flow channel; 242. Heavy phase flow channel. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0022] The following is a reference to the appendix. Figure 1 To be continued Figure 4 This invention describes a flow guide stator for extraction.

[0023] Currently, traditional stator structures suffer from severe fluid backmixing, low mass transfer efficiency, and a tendency to flood. Backmixing reduces mass transfer efficiency, and the resulting low efficiency necessitates increased flow rate compensation, which in turn exacerbates the risk of flooding, creating a vicious cycle.

[0024] Therefore, the flow guide stator for this extraction includes a shell 21, on which an annular baffle 22 is fixedly connected. The annular baffle 22 is sealed to the inner wall of the extraction column. The upper and lower ends of the annular baffle 22 respectively collect heavy phase fluid and light phase fluid. The shell 21 is provided with multiple independent heavy phase channels 242 and light phase channels 241. The starting end of the heavy phase channel 242 is located above the annular baffle 22, and the ending end of the heavy phase channel 242 is located at the bottom of the shell 21. The heavy phase fluid at the upper end of the annular baffle 22 flows downward through the starting end of the heavy phase channel 242 and flows out from the ending end of the heavy phase channel 242, which is evenly distributed to the entire column cross section. The starting end of the light phase channel 241 is located below the annular baffle 22, and the ending end of the light phase channel 241 is located at the top of the shell 21. The light phase fluid at the lower end of the annular baffle 22 flows upward through the starting end of the light phase channel 241 and flows out from the ending end of the light phase channel 241, which is evenly distributed to the entire column cross section.

[0025] This flow guide stator 2 can rectify the disordered eddies generated by stirring into an ordered axial flow, significantly suppressing backmixing; it forces the liquid to be evenly distributed through uniformly distributed channels, avoiding "channeling" and greatly increasing the mass transfer interface; the uniformly distributed channels provide space for the coalescence of dispersed phase droplets, which helps maintain a stable droplet size distribution, widens the operating range and effectively delays flooding; and the flow guide stator 2 has a stable structure and internal support function, making it suitable for efficient liquid-liquid extraction processes.

[0026] The shell 21 includes an inner cylinder section 212, an outer cylinder section 211, and two second cover plates 213. The inner cylinder section 212 and the outer cylinder section 211 are located on the same axis. The two ends of the inner cylinder section 212 and the outer cylinder section 211 are fixedly connected by the two second cover plates 213. The outer cylinder section, the inner cylinder section, and the two second cover plates 213 form an internal cavity. The two ends of the inner cylinder section 212 and the outer cylinder section 211 are welded by the two second cover plates 213 to form the shell 21. In other embodiments of this utility model, other fixing methods such as screw connection, snap connection, etc. can also be used, as long as the outer cylinder section, the inner cylinder section, and the two second cover plates 213 can be fixed.

[0027] Multiple flow channel baffles 24 are fixedly connected inside the internal cavity, dividing the internal cavity into multiple independent heavy phase flow channels 242 and light phase flow channels 241. Preferably, the number of heavy phase flow channels 242 and light phase flow channels 241 is 3-10 each. In other embodiments of the utility model, the number of heavy phase flow channels 242 and light phase flow channels 241 is not less than one each.

[0028] One end of the flow channel baffle 24 is fixedly connected to the inner cylinder section 212, and the other end of the flow channel baffle 24 is fixedly connected to the outer cylinder section 211. Both sides of the flow channel baffle 24 are fixedly connected to two second cover plates 213 respectively. Preferably, one end of the flow channel baffle 24 can be welded to the inner cylinder section 212 or integrally formed, and the other end of the flow channel baffle 24 can be welded to the outer cylinder section 211 or integrally formed. Both sides of the flow channel baffle 24 can be welded to or riveted to the two second cover plates 213 respectively. In other embodiments of this utility model, the flow channel baffle 24 can also be connected to the inner cylinder section 212, the outer cylinder section 211 and the two second cover plates 213 by means of screws, bolts, threads, buckles, etc., as long as the flow channel baffle 24 can be fixed to the inner cylinder section 212, the outer cylinder section 211 and the two second cover plates 213.

[0029] The second cover plate 213 includes a first cover section 2133, a second cover section 2131, and a flange 2132. The first cover section 2133 and the second cover section 2131 are fixedly connected by the flange 2132. The end of the first cover section 2133 away from the flange 2132 is fixedly connected to the inner cylinder section 212, and the end of the second cover section 2131 away from the flange 2132 is fixedly connected to the outer cylinder section 211. Preferably, the first cover section 2133 and the second cover section 2131 are welded to or integrally formed with the flange 2132. The first cover section 2133 is located away from the flange 2132. One end of the first cover section 2133 is welded to or integrally formed with the inner cylinder section 212, and the end of the second cover section 2131 away from the flange 2132 is welded to or riveted to the outer cylinder section 211. In other embodiments of this utility model, the first cover section 2133, the second cover section 2131, the flange 2132, the inner cylinder section 212, and the outer cylinder section 211 can also be connected by screws, bolts, threads, snaps, etc., as long as the first cover section 2133, the second cover section 2131, the flange 2132, the outer cylinder section 211, and the inner cylinder section 212 can be fixed.

[0030] The first cover section 2133 includes a heavy phase first cover section and a light phase first cover section. The heavy phase first cover section is located on the lower second cover plate 213, and the light phase first cover section is located on the upper second cover plate 213.

[0031] The starting end of the heavy phase flow channel 242 and the starting end of the light phase flow channel 241 are both located on the outer cylinder section 211, and the ending end of the heavy phase flow channel 242 and the ending end of the light phase flow channel 241 are both located on the first cover section 2133. Specifically, the ending end of the heavy phase flow channel 242 is located on the heavy phase first cover section, and the ending end of the light phase flow channel 241 is located on the light phase first cover section.

[0032] Each heavy phase channel 242 is located between two adjacent light phase channels 241, and each light phase channel 241 is located between two adjacent heavy phase channels 242.

[0033] With the alternating and spaced arrangement of heavy phase flow channel 242 and light phase flow channel 241, when the fluid flows out from the end of their respective flow channels, it will form uniformly spaced source points on the cross section of the tower. This ensures that the two phase fluids can be uniformly distributed in the tower from both macroscopic and microscopic perspectives, laying a solid foundation for uniform mixing and efficient mass transfer in the next stage.

[0034] The shell 21 is provided with a heavy phase inlet 23 and a heavy phase outlet 232. The heavy phase inlet 23 is connected to the beginning end of the heavy phase flow channel 242, and the heavy phase outlet 232 is connected to the end end of the heavy phase flow channel 242. The heavy phase fluid at the upper end of the annular baffle 22 enters the heavy phase flow channel 242 through the heavy phase inlet 23 and flows downward, and flows out from the heavy phase outlet 232 and is evenly distributed to the entire tower cross section. The heavy phase inlet 23 is located above the annular baffle 22, and the heavy phase outlet 232 is located at the bottom of the shell 21. Specifically, the heavy phase inlet 23 is located on the outer cylinder section 211, and the bottom of the heavy phase inlet 23 is close to the upper part of the annular baffle 22. The heavy phase outlet 232 is located on the first cover section 2133 at the bottom of the shell 21, that is, the heavy phase outlet 232 is located on the first heavy phase cover section below the shell 21.

[0035] The heavy phase inlet 23 is located above the annular baffle 22, precisely aligned with the heavy phase layer that naturally accumulates in this area due to density differences, achieving efficient and smooth collection of the heavy phase fluid. The heavy phase outlet 232 is located on the first cover section 2133 at the bottom of the shell 21, guiding the heavy phase fluid downwards. The path is direct and conforms to the direction of gravity, reducing unnecessary energy loss. The heavy phase inlet 23 and the heavy phase outlet 232 optimize the flow path, making the system more adaptable to flow fluctuations and less prone to severe uneven distribution due to changes in flow velocity.

[0036] The shell 21 has a light phase inlet 231 and a light phase outlet 233. The light phase inlet 231 is connected to the beginning of the light phase flow channel 241, and the light phase outlet 233 is connected to the end of the light phase flow channel 241. The light phase fluid at the lower end of the annular baffle 22 enters the light phase flow channel 241 through the light phase inlet 231 and flows upward. It flows out from the light phase outlet 233 and is evenly distributed to the entire tower cross section. The light phase inlet 231 is located below the annular baffle 22, and the light phase outlet 233 is located at the top of the shell 21. Specifically, the light phase inlet 231 is located on the outer cylinder section 211, and the upper part of the light phase inlet 231 is close to the lower part of the annular baffle 22. The light phase outlet 233 is located on the first cover section 2133 at the top of the shell 21, that is, the light phase outlet 233 is located on the first light phase cover section above the shell 21.

[0037] The light phase inlet 231 is located below the annular baffle 22, which accurately collects the light phase fluid that gathers in the area due to buoyancy. The light phase outlet 233 is located on the first cover section 2133 at the top of the shell 21, which guides the light phase fluid to flow upward, and the path is natural and smooth.

[0038] The symmetrical design of the heavy phase flow channel 242 and the light phase flow channel 241 ensures that the entire stator structure is balanced, and the two phases flow without interfering with each other and work together to achieve the ideal flow field across the entire tower cross section.

[0039] The ratio of the flow area of ​​the light phase outlet 233 to the flow area of ​​the heavy phase outlet 232 is approximately equal to the ratio of the volumetric flow rates of the light phase fluid to the heavy phase fluid.

[0040] The area of ​​the light phase inlet 231 is greater than or equal to the area of ​​the light phase outlet 233, and the area of ​​the heavy phase inlet 23 is greater than or equal to the area of ​​the heavy phase outlet 232.

[0041] Working process of this flow guide stator 2: The heavy phase fluid gathered above the annular baffle 22 is cut into by the guide heavy phase inlet 23 on the outer cylinder section 211, flows downward in the heavy phase flow channel 242, undergoes aggregation and redispersion, and then flows out from the guide heavy phase outlet 232 at the bottom of the shell 21 and is evenly distributed to the entire tower cross section. At the same time, the light phase fluid gathered below the annular baffle 22 enters the light phase channel through the guide light phase inlet 231, rises in an orderly manner and flows out from the guide light phase outlet 233 at the top of the shell 21 and is evenly distributed to the entire tower cross section. This dual-channel design achieves efficient separation and guidance of the two-phase fluid.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A flow guide stator for extraction, characterized in that, The system includes a shell with an annular baffle fixedly connected to it. The annular baffle is sealed to the inner wall of the extraction column. Heavy phase fluid and light phase fluid are collected at the upper and lower ends of the annular baffle, respectively. The shell contains multiple independent heavy phase channels and light phase channels. The starting end of the heavy phase channel is located above the annular baffle, and the ending end is located at the bottom of the shell. The heavy phase fluid at the upper end of the annular baffle flows downward through the starting end of the heavy phase channel and flows out from the ending end of the heavy phase channel, distributing evenly to the entire column cross-section. The starting end of the light phase channel is located below the annular baffle, and the ending end of the light phase channel is located at the top of the shell. The light phase fluid at the lower end of the annular baffle flows upward through the starting end of the light phase channel and flows out from the ending end of the light phase channel, distributing evenly to the entire column cross-section.

2. The flow guide stator for extraction according to claim 1, characterized in that, Each heavy phase channel is located between two adjacent light phase channels, and each light phase channel is located between two adjacent heavy phase channels.

3. The flow guide stator for extraction according to claim 1, characterized in that, The shell has a guide heavy phase inlet and a guide heavy phase outlet. The guide heavy phase inlet is connected to the beginning of the heavy phase flow channel, and the guide heavy phase outlet is connected to the end of the heavy phase flow channel. The heavy phase fluid at the upper end of the annular baffle enters the heavy phase flow channel through the guide heavy phase inlet and flows downward, and flows out from the guide heavy phase outlet and is evenly distributed to the entire tower cross section.

4. The flow guide stator for extraction according to claim 3, characterized in that, The flow-guiding heavy phase inlet is located above the annular baffle, and the flow-guiding heavy phase outlet is located at the bottom of the shell.

5. The flow guide stator for extraction according to claim 3, characterized in that, The shell has a light phase inlet and a light phase outlet. The light phase inlet is connected to the beginning of the light phase flow channel, and the light phase outlet is connected to the end of the light phase flow channel. The light phase fluid at the lower end of the annular baffle enters the light phase flow channel through the light phase inlet and flows upward, and flows out from the light phase outlet and is evenly distributed to the entire tower cross section.

6. The flow guide stator for extraction according to claim 5, characterized in that, The light phase inlet is located below the annular baffle, and the light phase outlet is located at the top of the housing.

7. The flow guide stator for extraction according to claim 1, characterized in that, The shell includes an inner cylinder section, an outer cylinder section, and two second cover plates. The inner cylinder section and the outer cylinder section are located on the same axis. The two ends of the inner cylinder section and the outer cylinder section are fixedly connected by the two second cover plates. The outer cylinder section, the inner cylinder section, and the two second cover plates form the internal cavity.

8. The flow guide stator for extraction according to claim 7, characterized in that, Multiple flow channel baffles are fixedly connected inside the internal cavity, which divide the internal cavity into multiple independent heavy phase flow channels and light phase flow channels.

9. The flow guide stator for extraction according to claim 7, characterized in that, The second cover plate includes a first cover section, a second cover section, and a flange. The first cover section and the second cover section are fixedly connected by the flange. The end of the first cover section away from the flange is fixedly connected to the inner cylinder section, and the end of the second cover section away from the flange is fixedly connected to the outer cylinder section.

10. The flow guide stator for extraction according to claim 9, characterized in that, The starting ends of both the heavy phase flow channel and the light phase flow channel are located on the outer cylinder section, while the ending ends of both the heavy phase flow channel and the light phase flow channel are located on the first cover section.

11. The flow guide stator for extraction according to claim 5, characterized in that, The ratio of the flow area of ​​the light phase outlet to the flow area of ​​the heavy phase outlet is approximately equal to the ratio of the volumetric flow rates of the light phase fluid to the heavy phase fluid.

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