A centrifugal extractor mixing structure

Abstract

The present application relates to solvent extraction equipment technical field, specifically provide a kind of centrifugal extractor mixing structure, the centrifugal extractor mixing structure includes shell, the shell is equipped with for installing drum drum accommodating cavity, the sidewall of drum accommodating cavity is equipped with feed inlet, the bottom wall of drum accommodating cavity is equipped with annular inlet and multiple splitter vanes, each splitter vane is arranged on the circumference of annular inlet with interval, one end of the splitter vane is the material inlet end away from the annular inlet, the other end is discharge end;The spacing between the top edge of material inlet end and the bottom wall of drum accommodating cavity is less than the spacing between the top edge of discharge end and the bottom wall of drum accommodating cavity, for making material inlet end intercept a part of the while supplying a part of the revolving liquid from the top of the material inlet end. The centrifugal extractor provided by the present application effectively solves the technical problem that the mixing effect of the drum accommodating cavity of the centrifugal extractor in the prior art is limited.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solvent extraction equipment, in particular to a mixing structure of a centrifugal extractor. BACKGROUND

[0002] The centrifugal extractor is an extraction equipment designed by using extraction separation principle, which is widely used in metallurgy, medicine and chemical industry. At present, the mixing methods of the centrifugal extractors on the market mainly include two kinds. One is to adopt an annular gap structure, and the light and heavy liquid phases enter the annular gap between the shell and the rotating drum of the centrifugal extractor from the respective feed ports, and the vortex generated by the high-speed rotating drum in the "annular gap" cavity is used to mix the materials. The other is to use the paddle rotating synchronously with the rotating drum to forcibly stir the mixed liquid. The mixing intensity of the above two mixing methods is relatively large, the power consumption is high, and the high-intensity mixing is easy to emulsify the liquid, causing incomplete phase separation or processing capacity reduction. The mixing intensity of the above two mixing methods is relatively large, the power consumption is high, and the high-intensity mixing is easy to emulsify the liquid, causing incomplete phase separation or processing capacity reduction.

[0003] The centrifugal extractor disclosed in the Chinese patent with the authorized announcement number CN203842347U is shown in the accompanying drawings, and the mixing structure of the centrifugal extractor includes a shell 1, the inner wall surface of the shell 1 forms a rotating drum accommodating cavity 2, the side wall of the rotating drum accommodating cavity 2 is provided with a feed port 3, the bottom wall of the rotating drum accommodating cavity 2 is provided with a circular opening, the circular opening is in communication with a mixing chamber located on the lower side of the bottom wall of the rotating drum accommodating cavity 2, a rotating drum 6 is coaxially and rotationally arranged in the rotating drum accommodating cavity 2, a material inlet end 7 at the lower side of the rotating drum 6 extends into the mixing chamber through the circular opening, and the material inlet end 7 and the circular opening form an annular inlet 5 for the downward movement of the feed liquid into the mixing chamber. Figure 1 Figure 1 and Figure 2 ​As shown, the bottom wall of the drum accommodating cavity 2 is arranged with vortex guide vanes 4, which include flow guide vanes 41 for guiding the feed liquid entering from the feed port and flow splitting vanes 42 for splitting the feed liquid, the flow splitting vanes 42 are uniformly spaced in the circumferential direction of the annular inlet 5, and the end away from the annular inlet 5 is the feed end 43, and the other end is the discharge end 44, and the flow splitting vanes 42 form a feed liquid flow channel between adjacent vortex guide vanes 4. In use, the feed liquid falls along the tangential direction of the drum accommodating cavity 2 to the bottom wall of the drum accommodating cavity 2 through the feed port 3, and the feed liquid rotates at high speed on the bottom wall of the drum accommodating cavity 2 under the action of the initial velocity, and when the rotating feed liquid passes through the flow splitting vanes 42 under the guidance of the flow guide vanes 41, the feed liquid inside the corresponding feed end 43 will be intercepted in the radial direction of the drum accommodating cavity 2, and the intercepted feed liquid will be mixed in the corresponding feed liquid flow channel and then flow into the annular inlet 5, and the feed liquid outside the corresponding feed end 43 will pass through the feed end 43 to enter the downstream area of the corresponding flow splitting vane 42 to pass through the next flow splitting vane 42. After one rotation of the rotating feed liquid, the feed liquid is intercepted by the vortex guide vanes 4 into the same number of portions as the vortex guide vanes 4, and each intercepted portion of the feed liquid is mixed in the corresponding feed liquid flow channel and finally flows into the annular inlet 5. After entering the mixing chamber, the feed liquid is sucked into the inside of the drum 6 through the feed end sub 7 on the lower side of the drum 6, and under the action of centrifugal force, the mixed two liquid phases flow from bottom to top in the drum 6, and quickly separate during the flow process. From the use process, it can be seen that the mass transfer process and the separation process of the centrifugal extractor are completed in a very short time of the feed liquid staying inside the equipment.

[0004] The above centrifugal extractor solves the problems of high mixing power consumption and easy emulsification of the feed liquid of the current centrifugal extractor, but has the following problems in use: first, affected by the flow rate and flow of the feed liquid, the amount of intercepted feed liquid is different when the feed liquid passes through each flow splitting vane, and each intercepted portion of the feed liquid can only be mixed in the corresponding feed liquid flow channel, resulting in insufficient mixing of the feed liquid when entering the mixing chamber; second, the feed liquid is difficult to divide evenly, the greater the initial velocity of the feed liquid, the finer the liquid flow when the liquid rotates, the less the feed liquid intercepted by the flow splitting vane that first contacts the feed liquid, and the more the feed liquid intercepted by the flow splitting vane that later contacts the feed liquid, especially after passing through the last flow splitting vane, the feed liquid that is not intercepted is all intercepted by the flow guide vane into the corresponding feed liquid flow channel, and even the feed liquid intercepted by the flow guide vane may account for about seventy percent of the total amount of feed liquid, which causes congestion of the feed liquid in the feed liquid flow channel when entering the annular inlet, thereby affecting the feeding efficiency; third, when the flow rate of the rotating feed liquid is too fast, the feed liquid will splash when passing through the flow splitting vane, and the splashed feed liquid will hit the drum, interfering with the rotation of the drum, thereby affecting the extraction effect. SUMMARY

[0005] The purpose of this invention is to provide a mixing structure for a centrifugal extractor, thereby solving the technical problem that the mixing effect of the drum cavity in the mixing structure of existing centrifugal extractors is limited.

[0006] The mixing structure of the centrifugal extractor in this invention adopts the following technical solution:

[0007] The centrifugal extractor mixing structure includes a housing, within which a drum housing cavity is provided for mounting a drum. A feed inlet is located on the side wall of the drum housing cavity, and an annular inlet and multiple diverting guide vanes are located on the bottom wall of the drum housing cavity. Each diverting guide vane is spaced apart circumferentially around the annular inlet. One end of each diverting guide vane is the feed end away from the annular inlet, and the other end is the discharge end. The distance between the top edge of the feed end and the bottom wall of the drum housing cavity is smaller than the distance between the top edge of the discharge end and the bottom wall of the drum housing cavity, allowing the feed end to intercept a portion of the swirling liquid while simultaneously allowing a portion of the swirling liquid to pass over the top of the feed end.

[0008] Beneficial Effects: In use, the centrifugal extractor mixing structure provided by this invention allows the liquid to swirl around the bottom wall of the drum cavity after entering it. Liquid flow channels are formed between adjacent guide vanes. When the swirling liquid passes the inlet end of each guide vane, a portion of the liquid is intercepted because the distance between the top edge of the inlet end and the bottom wall of the drum cavity is smaller than the distance between the top edge of the outlet end and the bottom wall of the drum cavity. The intercepted liquid enters the corresponding flow channel, while the unintercepted liquid passes over the upper area of ​​the corresponding inlet end. During the swirling process, the unintercepted liquid crosses the corresponding inlet end and mixes with the liquid in the adjacent flow channels, enhancing the mixing effect. Simultaneously, the small distance between the top edge of the inlet end and the bottom wall of the drum cavity results in less intercepted liquid, allowing the liquid to swirl more than once, increasing the number of interceptions at the inlet end. Consequently, the intercepted liquid... The mixing frequency is also increased. Compared to the existing technology where the diverting guide vane directly divides the liquid into corresponding portions and mixes them in their respective channels, with each channel mixing again at the annular inlet, the diverting guide vane in this invention takes a smaller amount of liquid at a time and takes it more times, resulting in more liquid merging and mixing, thus achieving a better mixing effect. On the other hand, because the amount of liquid taken at a time is smaller and the number of times it is taken is greater, the principle of taking small amounts more often is applied. When facing liquids with different flow rates, the amount of liquid in each channel can be distributed as evenly as possible, avoiding excessive liquid in individual channels and preventing corresponding local congestion when the liquid enters the annular inlet, thereby improving feeding efficiency. In addition, the small distance between the top edge of the feed end and the bottom wall of the drum cavity can also reduce the splashing of liquid when passing through the diverting guide vane, reducing the impact on the rotation of the drum.

[0009] Further, the top edge of the flow guide vane is a smooth bevel, and the distance between the top edge of the flow guide vane and the bottom wall of the drum accommodating cavity gradually increases in the direction from the inlet end to the outlet end.

[0010] Beneficial effect: The flow guide vane adopts this smooth transition structure, which on the one hand makes it easier for the material liquid to pass over the inlet end, thereby enhancing the mixing between the material liquids in each material liquid flow channel; on the other hand, it avoids the splashing degree being intensified due to the sudden change in height when the material liquid passes through the flow guide vane, thereby affecting the rotation of the drum.

[0011] Further, the inner wall surface of the annular inlet is circular, and the included angle between the tangent line corresponding to each outlet end and the tangent line corresponding to the corresponding part of the annular inlet is not greater than 30 degrees; or the inner wall surface of the annular inlet is a regular polygon, and the included angle between the tangent line corresponding to each outlet end and the corresponding side of the regular polygon is not greater than 30 degrees.

[0012] Beneficial effect: The outlet end is arranged in this way to avoid the material liquid impacting the inlet end sub in the middle part of the annular inlet when the material liquid enters the annular inlet, thereby causing the occurrence of impact congestion.

[0013] Further, a plurality of flow holes are arranged on the side surface of the flow guide vane, and each flow hole is arranged at intervals in the extension direction of the flow guide vane to allow the material liquid to pass through when flowing along the flow guide vane to improve the mixing effect.

[0014] Beneficial effect: The mixing protrusion can hinder the material liquid to a certain extent during the process of flowing into the annular inlet along the flow guide vane, thereby prolonging the mixing time of the material liquid in the material liquid flow channel and improving the mixing effect.

[0015] Further, the shape of the mixing protrusion is a circular convex column.

[0016] Beneficial effect: The outer circumferential surface of the circular convex column is relatively smooth, and the impact generated when the material liquid passes through the circular convex column is small, effectively avoiding the splashing of the material liquid during the process of flowing into the annular inlet, and the splashed material liquid is generally easy to fall onto the drum, thereby affecting the normal rotation of the drum.

[0017] Further, a plurality of flow holes are arranged on the side surface of the flow guide vane, and each flow hole is arranged at intervals in the extension direction of the flow guide vane to allow the material liquid to pass through when flowing along the flow guide vane to improve the mixing effect.

[0018] Beneficial effect: During the process of flowing into the annular inlet along the flow guide vane, part of the material liquid in each material liquid flow channel can pass through the flow hole into the adjacent material liquid flow channel and mix with the material liquid in the corresponding material liquid flow channel again, thereby further improving the mixing effect.

[0019] Further, a flow guide vane is arranged at the bottom wall of the drum accommodating cavity, and is isolated between the annular inlet and the feed inlet or the feed outlet of the spiral premixing channel. The flow guide vane is provided with a raised portion at a position beside the feed inlet or the feed outlet, so as to prevent the splashing feed liquid from impacting on the drum when falling on the bottom wall of the drum accommodating cavity.

[0020] Beneficial effects: The splashing feed liquid is prevented from impacting on the drum, so as to affect the rotation of the drum.

[0021] Further, the flow guide vane is arranged only at a position near the bottom wall of the drum accommodating cavity.

[0022] Beneficial effects: The flow guide vane is arranged in this way so as to simplify the structure of the bottom wall of the drum accommodating cavity.

[0023] Further, the flow guide vane has an end extending to the annular inlet, and is provided with a low-height recess at a position corresponding to the feed inlet of the flow guide vane in the circumferential direction, so that the portion between the recess and the end of the flow guide vane forms a flow guide vane.

[0024] Beneficial effects: This arrangement is to prolong the flow guide length of the flow guide vane, and to improve the flow guide effect. In addition, the recess and the end of the flow guide vane form a new flow guide vane, so as to increase the flow guide times of the feed liquid and improve the mixing effect.

[0025] Further, the bottom wall of the drum accommodating cavity is further provided with an inclined transition plate located below the feed inlet or the feed outlet of the spiral premixing channel, so as to buffer the impact of the falling feed liquid.

[0026] Beneficial effects: When the feed liquid falls on the bottom wall of the drum accommodating cavity, the inclined transition plate can prevent the feed liquid from directly impacting on the bottom wall of the drum accommodating cavity, so as to reduce the kinetic energy loss of the feed liquid, and to make the feed liquid preserve more kinetic energy for rotation. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of a centrifugal extractor;

[0028] Figure 2 is a structural schematic view of the bottom wall of the drum accommodating cavity of the centrifugal extractor in Figure 1

[0029] is a structural schematic view of the bottom wall of the drum accommodating cavity of the centrifugal extractor in Figure 3

[0030] is a structural schematic view of the mixing structure of the centrifugal extractor provided by the present application; Figure 4 Figure 3 is a structural schematic view of the bottom wall of the drum accommodating cavity in

[0031] Figure 5 ​This is a schematic diagram of the inclined transition plate at the bottom wall of the drum's receiving cavity; (guide vanes are not shown in the diagram).

[0032] Figure 6 This is a flow diagram of the liquid material at the bottom wall of the drum's receiving cavity;

[0033] Figure 7 These are schematic diagrams of the structure at the bottom wall of the drum receiving cavity in Examples 10 and 13;

[0034] Figure 8 yes Figure 7 Side view;

[0035] Figure 9 These are schematic diagrams of the structure at the bottom wall of the drum receiving cavity in Examples 11 and 12;

[0036] Figure 10 This is a schematic diagram of the structure at the bottom wall of the drum receiving cavity in Example 14.

[0037] The names of the components corresponding to the corresponding reference numerals in the figure are:

[0038] Figures 1-2 In the middle: 1. Shell; 2. Drum receiving cavity; 3. Feed inlet; 4. Vortex guide vane; 41. Flow guide vane; 42. Flow divider vane; 43. Feed end; 44. Discharge end; 5. Annular inlet; 6. Drum; 7. Feed terminal;

[0039] Figures 3-6 In the middle: 1. Shell; 2. Drum receiving cavity; 21. Inclined transition plate; 22. Annular inlet; 3. Feed inlet; 4. Guide vane; 41. Elevated section; 5. Diverting guide vane; 51. Feed end; 52. Discharge end; 6. Liquid; 61. Part of liquid blocked; 62. Part of liquid overflowing;

[0040] Figures 7-8 In the middle: 100, shell; 200, drum receiving cavity; 201, annular inlet; 300, guide vane; 400, diversion guide vane;

[0041] Figure 9 In the middle: 500, drum housing cavity; 501, flow divider vane; 502, mixing protrusion;

[0042] Figure 10 In the middle: 500, drum housing cavity; 501, flow guide vane; 503, flow passage. Detailed Implementation

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and are not intended to limit the present application, i.e., the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0044] Therefore, the detailed description of the embodiments of the present application provided below in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of the present application.

[0045] It should be noted that in the specific embodiments of the present application, the relationship terms such as "first" and "second" and the like that can appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between the entities or operations. Moreover, the terms such as "include", "contain" or any other variants that can appear are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. The limiting elements that can appear, such as "including a", do not exclude the presence of other identical elements in the process, method, article or device including the elements, without more limitations.

[0046] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" that can appear should be understood broadly, for example, can be fixed connection, can be detachable connection, or integral connection; can be mechanical connection, can be electrical connection; can be direct connection, or indirect connection through intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the description of the present application, unless otherwise explicitly specified and limited, the term "provided with" that can appear should be understood broadly, for example, the object "provided with" can be a part of the body, or can be arranged separately from the body and connected to the body, and the connection can be detachable connection, or can be non-detachable connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] The application will be further described in detail in connection with the following examples.

[0049] Embodiment 1 of the mixing structure of the centrifugal extractor in the application:

[0050] As shown in Figure 3 and Figure 6 , the mixing structure of the centrifugal extractor provided in the embodiment includes a shell 1, the inner wall surface of the shell 1 forms a drum accommodating cavity 2, the drum accommodating cavity 2 is provided with a feed inlet 3, and the bottom wall of the drum accommodating cavity 2 is provided with a mixing feeder, which includes an annular inlet 22 and vortex vanes. In addition, a mixing chamber is arranged on the lower side of the drum accommodating cavity 2. In use, as shown in Figure 3 and Figure 5 , the feed liquid 6 falls to the bottom wall of the drum accommodating cavity 2 after entering the feed inlet 3, and the feed liquid 6 is guided and divided by the vortex vanes and then enters the mixing chamber through the annular inlet 22.

[0051] In the embodiment, as shown in Figure 3 and Figure 4 , the shell 1 is in the shape of a cylinder as a whole, the inner wall surface of the shell 1 forms a cylindrical drum accommodating cavity 2, and the feed inlet 3 is arranged on the side wall of the drum accommodating cavity 2. As shown in Figure 3 , the bottom wall of the drum accommodating cavity 2 is a concave arc surface, the annular inlet 22 is arranged in the middle part of the bottom wall of the drum accommodating cavity 2, the annular inlet 22 is circular, the vortex vanes are uniformly and spacedly arranged in the circumferential direction of the annular inlet 22, the adjacent vortex vanes form a feed liquid flow channel, and the vortex vanes include flow guide vanes 4 and flow dividing vanes 5. Specifically, the number of the flow guide vanes 4 is one, and the number of the flow dividing vanes 5 is five, and the structures of the flow dividing vanes 5 are the same. The flow dividing vanes 5 are circular-arc-shaped blades, and the flow dividing vanes 5 have a feed inlet end 51 and a feed outlet end 52. The feed inlet end 51 is an end of the flow dividing vanes 5 away from the annular inlet 22, and the feed outlet end 52 is an end of the flow dividing vanes 5 close to the annular inlet 22. The spacing between the top edge of the feed inlet end 51 and the bottom wall of the drum accommodating cavity 2 is smaller than the spacing between the top edge of the feed outlet end 52 and the bottom wall of the drum accommodating cavity 2. Specifically, along the direction from the feed inlet end 51 to the feed outlet end 52, the top edge of the flow dividing vanes 5 is a smooth bevel, and the spacing between the top edge of the flow dividing vanes 5 and the bottom wall of the drum accommodating cavity 2 gradually increases.

[0052] In the embodiment, a spiral premixing channel is arranged inside the drum accommodating cavity 2. After the feed liquid 6 enters the drum accommodating cavity 2 through the feed inlet 3, the feed liquid 6 is first mixed in the spiral premixing channel and then falls to the bottom wall of the drum accommodating cavity 2 through a feed falling port of the spiral premixing channel. In the embodiment, the flow guide vanes 4 are arranged between the feed falling port of the spiral premixing channel and the annular inlet 22. Figure 3 and Figure 4As shown, the flow guide vane 4 is in a spiral structure. To avoid the splashing material liquid 6 from the feed inlet 3 falling to the bottom wall of the drum accommodating cavity 2 from impacting on the drum, the flow guide vane 4 is provided with a raised portion 41, which is arranged at the side of the spiral pre-mixing channel. The raised portion 41 forms a shield to the drum, so that the splashing material liquid 6 impacts on the raised portion 41. As shown in Figure 4 As shown, the flow guide vane 4 has an end extending to the annular inlet 22, and the flow guide vane 4 is provided with a low-height recess, which is arranged at a position corresponding to the material inlet end 51 of the flow guide vane 5 in the circumferential direction. The part between the recess and the end of the flow guide vane 4 forms a flow separation portion. The flow guide vane 4 is provided with a flow separation portion at the end facing the annular inlet 22, and the structure of the flow separation portion is the same as that of the flow guide vane 5. Correspondingly, the flow separation portion can guide the material liquid 6, and the flow separation portion and the flow guide vanes 5 on the two sides thereof form material liquid flow channels, respectively. The flow separation portion and the flow guide vanes 5 are uniformly and spacedly arranged around the annular inlet 22, and together form six material liquid flow channels. In other embodiments, the flow separation portion can be arranged separately from the flow guide vane 4, and in this case, the flow separation portion is equivalent to the flow guide vane 5.

[0053] As shown in Figure 4 and Figure 6 The material liquid 6 has an initial speed when falling to the bottom wall of the drum accommodating cavity 2, and the material liquid 6 rotates in the drum accommodating cavity 2 under the guidance of the flow guide vane 4. When the rotating material liquid 6 passes through the material inlet end 51 of each flow guide vane 5, the corresponding material inlet end 51 intercepts a part of the material liquid 6. For convenience of description, the intercepted material liquid 6 is defined as a material liquid intercepted portion 61, which is located on the side of the corresponding flow guide vane 5 facing the rotating direction of the material liquid 6 and flows in the corresponding material liquid flow channel. The material liquid 6 that passes through the corresponding material inlet end 51 is a material liquid passing portion 62, which passes through above the corresponding material inlet end 51 to sequentially pass through the material inlet end 51 of the next flow guide vane 5 and repeat the above process.

[0054] It should be noted that the material liquid 6 continuously passes through the material inlet end 51 of each flow guide vane 5 in the rotating process. When the material liquid passing portion 62 that passes through the material inlet end 51 of the previous flow guide vane 5 passes through the material inlet end 51 of the next flow guide vane 5, a part of the material liquid 6 in the material liquid passing portion 62 is intercepted by the corresponding material inlet end 51. At this time, the intercepted part of the material liquid 6 becomes the material liquid intercepted portion 61. Therefore, the material liquid intercepted portion 61 and the material liquid passing portion 62 are only divided at this moment when the material liquid 6 passes through the corresponding material inlet end 51.

[0055] As shown in Figure 5As shown, in the process of the liquid 6 revolving, the liquid in each liquid flow channel is intercepted by a part of the liquid intercepting part 61 and will also cross the corresponding inlet end 51 to mix with the liquid intercepting part 61 in the adjacent liquid flow channel. With the liquid 6 revolving back and forth, the liquid intercepting part 61 in each liquid flow channel will cross the corresponding inlet end 51 to mix with the liquid intercepting part 61 in the adjacent liquid flow channel. The number of mixing between the liquid intercepting part 61 in each liquid flow channel will also increase accordingly. The number of revolutions of the liquid 6 will increase, and the mixing effect of the liquid 6 will be better.

[0056] In this embodiment, the lower the height of the inlet end 51 of the shunt guide vane 5, the less the amount of the liquid 6 intercepted by the inlet end 51. The revolving liquid 6 is easy to cross the inlet end 51. Accordingly, the number of revolutions of the liquid 6 will increase. As shown, Figure 3 As shown, the inlet end 51 is a pointed structure, which ensures that the height of the inlet end 51 is low enough. Moreover, the low height of the inlet end 51 can also reduce the splashing degree of the liquid 6 when passing through the shunt guide vane 5, and reduce the impact on the rotating drum. In addition, because the amount of the liquid 6 intercepted at one time is small, and the number of interception is large, the distribution principle of small amount and multiple taking is applied. When facing the liquid 6 with different flow rates, the amount of the liquid 6 in each liquid flow channel can be as evenly distributed as possible. In this way, it can be avoided that the amount of the liquid 6 in individual liquid flow channels is too much, so as to cause corresponding local congestion when the liquid 6 enters the annular inlet 22.

[0057] In this embodiment, because the amount of the liquid 6 intercepted by the inlet end 51 is very small, at any moment, the liquid intercepting part 61 in the liquid flow channel is relatively small, so that the liquid 6 will not be too concentrated when entering the annular inlet 22, and congestion can be avoided.

[0058] In this embodiment, the lower end of the rotating drum is connected with an inlet end terminal. The inlet end terminal passes through the annular inlet 22 and enters the mixing chamber. Here, in order to avoid that the liquid 6 will impact the inlet end terminal when entering the annular inlet 22, as shown, Figure 3 and Figure 5 As shown, the inner wall surface of the annular inlet 22 is circular. The tangent line at the outlet end 52 of the shunt guide vane 5 is tangent to the corresponding part of the annular inlet 22, that is, the included angle between the corresponding tangent line at the outlet end 52 and the tangent line at the corresponding part of the annular inlet 22 is zero degree. When the liquid intercepting part 61 enters the annular inlet 22, the impact direction of the liquid 6 will not point to the center of the annular inlet 22, but will enter along the side wall of the annular inlet 22, so as to avoid impact congestion.

[0059] In this embodiment, as shown, Figure 5As shown, the bottom wall of the drum accommodating cavity 2 is also provided with an inclined transition plate 21, the inclined direction of the inclined transition plate 21 is from top to bottom and inclined to the tangent direction of the rotation direction of the material liquid 6 at this position, the inclined transition plate 21 is arranged at the lower side of the material falling port of the spiral premixing channel, so that the material liquid 6 can directly fall on the inclined transition plate 21 after entering the drum accommodating cavity 2 from the material inlet 3, the inclined transition plate 21 can avoid the material liquid 6 directly impacting on the bottom wall of the drum accommodating cavity 2, reduce the kinetic energy loss of the material liquid 6 falling, and also reduce the splashing degree of the material liquid 6 falling.

[0060] Embodiment 2 of the mixing structure of the centrifugal extractor in the application:

[0061] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the top edge of the flow dividing vane is a smooth bevel along the direction from the material inlet end to the material outlet end, and the distance between the top edge of the flow dividing vane and the bottom wall of the drum mounting cavity gradually increases.

[0062] Embodiment 3 of the mixing structure of the centrifugal extractor in the application:

[0063] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the top edge of the flow dividing vane is a smooth bevel along the direction from the material inlet end to the material outlet end, and the distance between the top edge of the flow dividing vane and the bottom wall of the drum mounting cavity gradually increases. In the embodiment, the top edge of the flow dividing vane is a stepped surface along the direction from the material inlet end to the material outlet end, and the distance between the top edge of the flow dividing vane and the bottom wall of the drum mounting cavity gradually increases. In other embodiments, the top edge of the flow dividing vane is a bevel along the direction from the material inlet end to the material outlet end, and the distance between the top edge of the flow dividing vane and the bottom wall of the drum mounting cavity gradually increases.

[0064] Embodiment 4 of the mixing structure of the centrifugal extractor in the application:

[0065] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the distance between the top edge of the flow dividing vane and the bottom wall of the drum mounting cavity gradually increases along the direction from the material inlet end to the material outlet end. In the embodiment, the distance between the top edge of the flow dividing vane and the bottom wall of the drum mounting cavity is the same along the direction from the material inlet end to the material outlet end except the material inlet end, and the distance between the top edge of the material inlet end and the bottom wall of the drum accommodating cavity is smaller than the distance between the top edge of the remaining part of the flow dividing vane and the bottom wall of the drum accommodating cavity.

[0066] Embodiment 5 of the mixing structure of the centrifugal extractor in the application:

[0067] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the feeding end is a pointed structure. In the embodiment, the feeding end is not a pointed structure, and the feeding end has an end face.

[0068] Embodiment 6 of the mixing structure of the centrifugal extractor in the application:

[0069] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the feeding end is a pointed structure. In the embodiment, the feeding end is not a pointed structure, and the feeding end has an end face.

[0070] Embodiment 7 of the mixing structure of the centrifugal extractor in the application:

[0071] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the inner wall surface of the annular inlet is circular, and the tangents corresponding to the discharge ends are tangent to the annular inlet. In the embodiment, the angle between the tangent corresponding to the discharge end and the tangent at the corresponding position of the annular inlet is 30 degrees. In other embodiments, the angle between the tangent corresponding to the discharge end and the tangent at the corresponding position of the annular inlet can also be 15 degrees.

[0072] Embodiment 8 of the mixing structure of the centrifugal extractor in the application:

[0073] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the inner wall surface of the annular inlet is circular. In the embodiment, the inner wall surface of the annular inlet is a regular hexagon, and the angle between the tangent corresponding to the discharge end and the corresponding side of the regular hexagon is 30 degrees. In other embodiments, the inner wall surface of the annular inlet can also be a regular pentagon, and the angle between the tangent corresponding to the discharge end and the corresponding side of the regular pentagon is 0 degrees.

[0074] Embodiment 9 of the mixing structure of the centrifugal extractor in the application:

[0075] The difference between the embodiment and the embodiment 1 is that in the embodiment 1, the inside of the drum accommodating cavity is arranged with a spiral pre-mixing channel, the feeding end is a pointed structure, and the feeding end has an end face. In the embodiment, the inside of the drum accommodating cavity is not provided with a spiral pre-mixing channel, and the feeding end is not a pointed structure, and the feeding end has an end face.

[0076] Embodiment 10 of the mixing structure of the centrifugal extractor in the application:

[0077] The difference between the present embodiment and embodiment 1 is that, in embodiment 1, the bottom wall of the drum accommodating cavity is a concave arc surface. In the present embodiment, as shown in Figure 7 and Figure 8 shown, the bottom wall of the drum accommodating cavity 200 on the shell 100 is a conical surface.

[0078] Embodiment 11 of the mixing structure of the centrifugal extractor in the present application:

[0079] The difference between the present embodiment and embodiment 1 is that, in embodiment 1, the bottom wall of the drum accommodating cavity is a concave arc surface. In the present embodiment, as shown in Figure 9 shown, the bottom wall of the drum accommodating cavity 500 is a horizontal surface.

[0080] Embodiment 12 of the mixing structure of the centrifugal extractor in the present application:

[0081] The difference between the present embodiment and embodiment 1 is that, in embodiment 1, the side surface of the flow splitting vane is a smooth surface. In the present embodiment, as shown in Figure 9 shown, the side surface of the flow splitting vane 501 is provided with a plurality of mixing protrusions 502, each of which is a circular column, and each of which is arranged in the extension direction of the flow splitting vane 501 to disturb the flow of the feed liquid along the flow splitting vane 501 to improve the mixing effect. In other embodiments, each mixing protrusion can also be a square column.

[0082] Embodiment 13 of the mixing structure of the centrifugal extractor in the present application:

[0083] The difference between the present embodiment and embodiment 1 is that, in embodiment 1, the flow guiding vane has an end extending to the annular inlet. In the present embodiment, as shown in Figure 7 shown, the end of the flow guiding vane 300 is arranged at the periphery of the feed end of the flow splitting vane 400 and is radially spaced apart from the feed end of the flow splitting vane 400.

[0084] Embodiment 14 of the mixing structure of the centrifugal extractor in the present application:

[0085] The difference between the present embodiment and embodiment 1 is that, in embodiment 1, the side surface of the flow splitting vane is a smooth surface. In the present embodiment, as shown in Figure 10 shown, on the bottom wall of the drum accommodating cavity 500, a plurality of flow holes 503 are arranged on the side wall of the flow splitting vane 501, each of which is arranged in the extension direction of the flow splitting vane 501 to allow the feed liquid to pass through when flowing along the flow splitting vane 501 to improve the mixing effect.

[0086] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and the patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A centrifugal extractor mixing structure, characterized by, The application relates to a rotary drum mixer, which comprises a shell (1) provided with a rotary drum accommodating cavity (2) for mounting a rotary drum, a feeding port (3) arranged on the side wall of the rotary drum accommodating cavity (2), an annular inlet (22) and a plurality of flow distribution vanes (5) arranged on the bottom wall of the rotary drum accommodating cavity (2), wherein the flow distribution vanes (5) are uniformly arranged on the circumference of the annular inlet (22) and have the same structure, one end of the flow distribution vanes (5) is a feeding end (51) away from the annular inlet (22), and the other end is a discharging end (52), the distance between the top edge of the feeding end (51) and the bottom wall of the rotary drum accommodating cavity (2) is smaller than the distance between the top edge of the discharging end (52) and the bottom wall of the rotary drum accommodating cavity (2), so that the feeding end (51) can intercept part of the revolving material liquid (6) and allow part of the revolving material liquid (6) to flow over the top of the feeding end (51), the top edge of the flow distribution vane (5) is a smooth bevel, an arc concave edge, a stepped surface or a bevel, the distance between the top edge of the flow distribution vane (5) and the bottom wall of the rotary drum accommodating cavity (2) gradually increases in the direction from the feeding end (51) to the discharging end (52), and a flow guide vane (4) is arranged on the bottom wall of the rotary drum accommodating cavity (2) and is isolated between the annular inlet (22) and the feeding port (3) or the material falling port of a spiral premixing channel, so as to guide the revolving rotation of the material liquid at the bottom wall of the rotary drum accommodating cavity.

2. The centrifugal extractor mixing structure of claim 1, wherein, The inner wall surface of the annular inlet (22) is circular, the included angle between the tangent line corresponding to each discharging end (52) and the tangent line corresponding to the corresponding part of the annular inlet (22) is not greater than 30 degrees, or the inner wall surface of the annular inlet (22) is a regular polygon, and the included angle between the tangent line corresponding to each discharging end (52) and the corresponding side of the regular polygon is not greater than 30 degrees.

3. The centrifugal extractor mixing structure of claim 1, wherein, A plurality of mixing protrusions (502) are arranged on the side surface of the flow distribution vane (5), and the mixing protrusions (502) are arranged at intervals in the extension direction of the flow distribution vane (5), so as to disturb the flow of the material liquid (6) along the flow distribution vane (5) and improve the mixing effect.

4. The centrifugal extractor mixing structure of claim 3, wherein, The mixing protrusion is a circular convex column.

5. The centrifugal extractor mixing structure of claim 1, wherein, A plurality of flow holes (503) are arranged on the side surface of the flow distribution vane (5), and the flow holes (503) are arranged at intervals in the extension direction of the flow distribution vane (5), so as to allow the material liquid (6) to pass through when the material liquid (6) flows along the flow distribution vane (5) and improve the mixing effect.

6. The centrifugal extractor mixing structure of claim 1, wherein, The flow guide vane (4) is locally provided with a heightened part (41) on the side of the feeding port (3) or the material falling port, so as to prevent the splashing material liquid (6) from impacting on the rotary drum when the material liquid (6) falls to the bottom wall of the rotary drum accommodating cavity (2).

7. The centrifugal extractor mixing structure of claim 6, wherein, The flow guide vane (4) is arranged only near the position where the material liquid (6) falls to the bottom wall of the rotary drum accommodating cavity (2).

8. The centrifugal extractor mixing structure of claim 6, wherein, The flow guide vane (4) has an end extending to the annular inlet (22), a low-height recess is arranged on the flow guide vane (4) at a position corresponding to the feeding end (51) of the flow distribution vane (5) in the circumferential direction, and the part between the recess and the end of the flow guide vane (4) forms a flow distribution vane (5).

9. The centrifugal extractor mixing structure of claim 1, wherein, The bottom wall of the drum accommodating cavity (2) is further provided with an inclined transition plate (21) located at the lower side of the feed inlet (3) or the material dropping port of the spiral premixing channel to buffer the impact of the falling material liquid (6).

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