Feeding device and centrifugal separation equipment

Abstract

The invention relates to the technical field of centrifugal separation, and discloses a feeding device and centrifugal separation device.The feeding device comprises a premixing cavity fixedly arranged in the inlet area of a rotating drum in a sleeving mode, the rotating drum is arranged in a shell, a rotating shaft is coaxially arranged in the middle of the rotating drum, and the premixing cavity is arranged in the inlet area of the rotating drum in a sleeving mode; the rotating shaft penetrates through the rotary drum and extends into the premixing cavity, a second-stage mixing device is arranged at the end of the rotating shaft, a first-stage mixing device is arranged at the bottom of the premixing cavity, and the rotary drum, the premixing cavity and the rotating shaft are driven by the same power source to rotate; and the materials are sucked into the premixing cavity through the gap between the shell and the premixing cavity, are subjected to secondary mixing through the primary mixing device and the secondary mixing device and then enter the rotary drum. A heavy phase and a light phase are discretized and preliminarily mixed for the first time, then materials entering from the center of the bottom of a premixing cavity are immediately captured by a conical material mixing impeller and are subjected to high-strength mixing for the second time, and the materials are premixed through a special premixing cavity arranged at the front end of a rotary drum.

Description

Technical Field

[0001] This invention relates to the field of centrifugal separation technology, and in particular to a feeding device and a centrifugal separation equipment. Background Technology

[0002] Centrifugal separation equipment is a machine that uses centrifugal force generated by high-speed rotation to separate the components of a mixture. Centrifugal extraction equipment is a specialized type of machine used for liquid-liquid extraction, particularly suitable for efficient separation of systems that are easily emulsified or have small density differences. For example, in the recycling of new energy batteries, lithium ions need to be recovered from the lithium precipitation mother liquor (organic phase). This equipment allows the mother liquor and extractant (aqueous phase) to mix and transfer rapidly within its interior, and then uses powerful centrifugal force to achieve rapid and clear separation of the aqueous and organic phases, thereby efficiently extracting lithium. This process has advantages over traditional methods, such as high efficiency and less susceptibility to emulsification.

[0003] For example, in the utility model patent with authorization announcement number CN200977420Y, the two-phase liquid enters the annular gap between the rotating drum and the fixed drum from the light phase inlet and the heavy phase inlet for mixing and mass transfer. The mixed two-phase liquid enters the rotating drum from the bottom of the drum for phase separation. The separated light phase is discharged into the light phase collection chamber through the light phase weir and discharged from the stage through the light phase outlet. The clarified heavy phase is discharged into the heavy phase collection chamber through the heavy phase weir and discharged from the stage through the heavy phase outlet.

[0004] However, this scheme still has problems in the structural design of the mixing section. Specifically, after the heavy phase and the light phase enter the annular gap between the rotating drum and the stationary drum, preliminary mixing and mass transfer should be completed within this gap. However, in the current design, the cross-sectional area of ​​the annular gap between the two phases is large, and the flow channel space is relatively open. This results in a low linear velocity of the fluid passing through, and insufficient shear force. The two-phase fluid mainly passes through in a laminar or weakly turbulent state, with a small contact interface, low dispersion, and weak mass transfer driving force, resulting in poor mixing effect. This low mixing efficiency caused by low space utilization and insufficient fluid shear essentially wastes mixing energy and reduces the pretreatment effect, affecting the overall efficiency of subsequent centrifugal separation and extraction. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a relatively enclosed, small-volume feeding device and a centrifugal separation device with high mixing efficiency.

[0006] The technical solution of the present invention is as follows: This invention provides a feeding device, including a premixing cavity fixedly fitted in the inlet area of ​​a rotating drum. The rotating drum is arranged inside a housing, and a rotating shaft is coaxially arranged in the middle of the rotating drum. The premixing cavity is fitted in the inlet area of ​​the rotating drum. The rotating shaft passes through the rotating drum and extends into the premixing cavity, and a secondary mixing device is provided at its end. A primary mixing device is provided at the bottom of the premixing cavity. The rotating drum, the premixing cavity, and the rotating shaft are all driven by the same power source to rotate, so that the material is drawn into the premixing cavity through the gap between the housing and the premixing cavity, and after secondary mixing by the primary and secondary mixing devices, it enters the rotating drum.

[0007] According to one embodiment of the present invention, the secondary mixing device is configured as a mixing impeller fixedly installed at the bottom end of the rotating shaft and synchronously driven by the rotating shaft, the primary mixing device is configured as a centripetal impeller fixedly installed at the bottom end of the premixing chamber and synchronously driven by the premixing chamber, and an enhanced stirring impeller is fixedly installed on the inner wall of the premixing chamber, so that the enhanced stirring impeller is synchronously driven to rotate by the premixing chamber to enhance the stirring effect.

[0008] According to one embodiment of the invention, the bottom portion of the drum extends into the premixing chamber and is provided with a feed impeller for pumping fluid into the drum.

[0009] According to one embodiment of the present invention, it further includes a spiral feeder, which is fixedly connected to the outer wall of the premixing chamber so that the spiral feeder is synchronously driven to rotate by the premixing chamber to accelerate the downward flow of liquid in the gap between the outer shell and the premixing chamber.

[0010] According to one embodiment of the present invention, a mixing baffle is further included. The mixing baffle is fixedly installed on the top of the outer wall of the premixing chamber to cooperate with the spiral feeder to prevent the liquid in the gap between the outer shell and the premixing chamber from flowing upward.

[0011] According to one embodiment of the present invention, it further includes a pressing impeller, which is fixedly connected to the top of the inner wall of the premixing chamber so that the liquid on the outer side of the premixing chamber is rotated to the middle of the premixing chamber and drawn in.

[0012] According to one embodiment of the present invention, the device further includes a frame for manufacturing the outer shell, a drive motor is fixedly mounted on the frame, the top end of a rotating shaft is rotatably mounted on the frame, the actuating end of the drive motor is connected to the rotating shaft for transmission, and the drum is fixedly connected to the rotating shaft to achieve synchronous rotation.

[0013] According to one embodiment of the present invention, the longitudinal section of the mixing impeller is conical with a diameter that gradually increases from bottom to top.

[0014] This invention also provides a centrifugal separation device, including the feeding device of the above embodiment; it also includes a frame and a drive motor mounted on the frame, a housing is fixedly installed inside the frame, and a drum is rotatably installed inside the housing via a rotating shaft, the working end of the drive motor is connected to the rotating shaft for transmission, a heavy phase inlet and a light phase inlet are respectively provided on both sides of the bottom of the housing, and a heavy phase weir plate and a light phase weir plate are sequentially arranged on the top inner wall of the drum from top to bottom, a heavy phase collection chamber is formed above the heavy phase weir plate, and a light phase collection chamber is formed above the light phase weir plate, and the heavy phase is collected... A heavy phase outlet is formed on the cavity, and a light phase outlet is formed on the light phase collection cavity; multiple outlet cavities are arranged circumferentially on the heavy phase weir plate, rotating synchronously with the heavy phase weir plate. The outlet cavities are divided into a double-layer structure by impact baffles, so that the fluid inside the outlet cavities forms a C-shaped path. The outlet of the C-shaped path forms a nozzle for ejecting fluid in the opposite direction of rotation of the heavy phase weir plate, so that the reaction force of the fluid acts positively on the rotation of the outlet cavities. The reverse bend of the C-shaped path forms a force surface for positively acting on the rotation of the outlet cavities under the impact of the fluid.

[0015] According to one embodiment of the present invention, the force-applying surface is an inclined surface disposed on the inner wall of each outlet cavity, the incline of which points towards the nozzle side; the jetting direction of the nozzle is tangential to the circle formed by the rotation path of the outlet cavity; the outlet cavity has a streamlined head at the end away from the nozzle to reduce wind resistance; a guide hole communicating with the C-shaped path inlet is provided on the heavy phase weir plate; guide plates fixed in position to each other are installed at intervals below the heavy phase weir plate, and a guide cavity for receiving fluid on the side of the drum wall is formed between the heavy phase weir plate and the guide plates; a conical widening section is provided on the drum below the heavy phase weir plate so that the liquid inside and outside the drum flows faster and is deflected into the guide hole under the action of the guide plate; the cross-section of the guide hole is a cone with a diameter that gradually increases from bottom to top.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Based on the aforementioned device design, this invention pumps liquid into the premixing chamber via a centripetal impeller. This pumping process is accompanied by intense shearing and entrainment, completing the first discretization and preliminary mixing of the heavy and light phases. Subsequently, the material entering from the bottom center of the premixing chamber is immediately captured by the conical mixing impeller and undergoes a second high-intensity mixing. Through a dedicated premixing chamber located at the front end of the drum, this invention completes two-stage progressive mixing in a compact, relatively enclosed high-intensity shear field before the material enters the main drum, greatly improving the mass transfer surface area and mixing uniformity, creating excellent conditions for subsequent efficient extraction reactions. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a half-section structure according to Embodiment 1 of the present invention; Figure 2 for Figure 1 A magnified view of part B in the image; Figure 3 This is a schematic diagram of a half-section structure according to Embodiment 2 of the present invention; Figure 4 for Figure 3 A magnified view of part A in the image; Figure 5 for Figure 4 Derive the longitudinal section of the cavity; Figure 6 for Figure 4 Export the top view of the cavity.

[0019] In the picture: 100. Centrifugal separation equipment; 200. Centrifugal effluent kinetic energy recovery device; 300. Feeding device; 101. Frame; 102. Drive motor; 103. Outer shell; 104. Rotating shaft; 105. Rotating drum; 105A. Conical widening section; 106. Heavy phase weir plate; 107. Light phase weir plate; 108. Heavy phase collection chamber; 109. Light phase collection chamber; 110. Heavy phase outlet; 111. Light phase outlet; 112. Guide hole ; 113. Heavy phase inlet; 114. Light phase inlet; 115. Feed impeller; 201. Outlet cavity; 202. Nozzle; 203. Head; 203A. Inclined surface; 204. Impact baffle; 205. Guide plate; 301. Premixing cavity; 302. Spiral suction impeller; 303. Mixing impeller; 304. Enhanced stirring impeller; 305. Mixing baffle; 306. Spiral feeder; 307. Press impeller. Detailed Implementation

[0020] 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 embodiments of the present invention, and not all embodiments.

[0021] Example 1

[0022] like Figures 1 to 2As shown, the feeding device 300 of this embodiment includes a premixing chamber 301 fixedly sleeved in the inlet area of ​​the drum 105. The drum 105 (a rotating separation chamber, typically made of stainless steel) is arranged inside the housing 103. A rotating shaft 104 (the main drive shaft, for transmitting power) is coaxially arranged in the middle of the drum 105. The premixing chamber 301 (a pre-mixing chamber for initial mixing of materials) is sleeved in the inlet area of ​​the drum 105. The rotating shaft 104 passes through the drum 105 and extends into the premixing chamber 301, with a secondary mixing device (a fine mixing component for further homogenizing the materials) at its end. The premixing chamber 301... 01 The bottom is equipped with a primary mixing device (coarse mixing component, for initial stirring and intake). The drum 105, premix chamber 301, and rotating shaft 104 are all driven by the same power source to generate rotation (synchronous rotation to ensure coordinated operation of each component). This allows the material to be drawn into the premix chamber 301 through the gap between the outer shell 103 and the premix chamber 301, and then undergo secondary mixing through the primary and secondary mixing devices before entering the drum 105 (first flowing into the premix chamber 301 through the gap, then undergoing preliminary mixing by the primary mixing device, then fine stirring by the secondary mixing device, and finally entering the drum 105). In this embodiment, the secondary mixing device is configured as a mixing impeller 303 (conical stirring blades, enhancing shear force) fixedly installed at the bottom end of the rotating shaft 104 and synchronously driven by the rotating shaft 104. The primary mixing device is configured as a centripetal impeller 302 (radial suction structure, achieving centripetal flow of materials) fixedly installed at the bottom end of the premixing chamber 301 and synchronously driven by the premixing chamber 301. An enhanced stirring impeller 304 (auxiliary turbulence blades, enhancing turbulence intensity) is fixedly installed on the inner wall of the premixing chamber 301, so that the enhanced stirring impeller 304 is synchronously driven to rotate by the premixing chamber 301 to enhance the mixing effect (first, the premixing chamber 301 rotates, driving the enhanced stirring impeller 304, then the impeller agitates and breaks the laminar flow, promoting uniform mixing of materials). In this embodiment, the bottom portion of the drum 105 extends into the premixing chamber 301, and a feed impeller 115 (with built-in pumping element, actively conveying as the drum 105 rotates) is provided on this portion for pumping fluid into the drum 105. This embodiment also includes a spiral guide 306 (axial guide vanes, fixed to the outer wall of the premixing chamber 301). The spiral guide 306 is fixedly connected to the outer wall of the premixing chamber 301 so that the spiral guide 306 is synchronously driven to rotate by the premixing chamber 301 to accelerate the downward flow of liquid in the gap between the outer shell 103 and the premixing chamber 301 (first the spiral guide 306 rotates to guide the liquid to flow downward along the axial direction, and then the liquid in the gap is accelerated to quickly gather).This embodiment also includes a mixing baffle 305 (anti-backflow baffle, installed on the top of the outer wall of the premixing chamber 301). The mixing baffle 305 is fixedly installed on the top of the outer wall of the premixing chamber 301 to cooperate with the spiral guide 306 to prevent the liquid in the gap between the outer shell 103 and the premixing chamber 301 from flowing upward (first, the mixing baffle 305 blocks the liquid from flowing upward back, and then works with the spiral guide 306 to form a single downward flow channel). This embodiment also includes a pressing impeller 307 (radial backflow guide impeller, fixed on the top of the inner wall of the premixing chamber 301). The pressing impeller 307 is fixedly connected to the top of the inner wall of the premixing chamber 301 so that the liquid on the outer side of the premixing chamber 301 rotates back to the middle of the premixing chamber 301 and is sucked in (first, the pressing impeller 307 rotates to guide the outer peripheral liquid to the center, and then promotes the smooth flow of the material into the primary mixing device). This embodiment also includes a frame 101 (support frame, typically a welded metal structure) for supporting the outer casing 103. A drive motor 102 (main drive unit, providing rotational power) is fixedly mounted on the frame 101. The top end of the rotating shaft 104 is rotatably mounted on the frame 101. The actuating end of the drive motor 102 is connected to the rotating shaft 104 via a coupling or belt drive. The drum 105 is fixedly connected to the rotating shaft 104 to achieve synchronous rotation (rigid connection structure, ensuring stable operation of the drum 105). In this embodiment, the longitudinal section of the mixing impeller 303 presents a cone shape with a gradually increasing diameter from bottom to top (inverted cone structure, which facilitates the guidance of materials from the outside to the inside). This embodiment also provides a centrifugal separation device 100 (industrial centrifugal separation system), including the feeding device 300 of the above embodiment; it also includes a frame 101 and a drive motor 102 mounted on the frame 101. A shell 103 (equipment outer cylinder, generally a metal shell) is fixedly installed inside the frame 101. A drum 105 is rotatably mounted inside the shell 103 via a rotating shaft 104. The working end of the drive motor 102 is connected to the rotating shaft 104 for transmission. A heavy phase inlet 113 and a light phase inlet 113 are respectively provided on both sides of the bottom of the shell 103. From top to bottom, the inner wall of the top of the drum 105 is provided with a heavy phase weir plate 106 and a light phase weir plate 107 (overflow weir for controlling the separation height of the two phases). A heavy phase collection chamber 108 (heavy phase temporary storage area) is formed above the heavy phase weir plate 106, and a light phase collection chamber 109 (light phase temporary storage area) is formed above the light phase weir plate 107. A heavy phase outlet 110 (heavy phase discharge channel) is formed on the heavy phase collection chamber 108, and a light phase outlet 111 (light phase discharge channel) is formed on the light phase collection chamber 109.

[0023] Example 2

[0024] like Figures 3 to 6As shown, based on Embodiment 1, a centrifugal effluent kinetic energy recovery device 200 is added, specifically configured as follows: Multiple outlet chambers 201 (rotary kinetic energy recovery units, evenly distributed and fixedly connected) are arranged circumferentially with the heavy phase weir plate 106 and rotate synchronously with it. The outlet chambers 201 are divided into a double-layer structure (forming inner and outer flow channels) by impact baffles 204, thereby forming a C-shaped path for the fluid inside the outlet chamber (fluid flows along the curved channel). The outlet of the C-shaped path forms a nozzle 202 (reverse jet nozzle) for ejecting fluid in the opposite direction to the rotation of the heavy phase weir plate 106, so that the reaction force of the fluid acts positively on the rotation of the outlet chamber 201 (using Newton's third law to generate a boosting torque and improve the rotational stability of the drum 105). The reverse bend of the C-shaped path forms a force-guiding area (force-directing area) for positively acting on the rotation of the outlet chamber 201 under fluid impact. The force-bearing surface is an inclined surface 203A (inclined guide surface) set on the inner wall of each outlet cavity 201, with the slope direction of the inclined surface 203A pointing towards the nozzle 202 (to guide the fluid to smoothly change direction). The spray direction of the nozzle 202 is tangential to the circle formed by the rotation path of the outlet cavity 201 (spraying in the opposite direction along the tangent to enhance thrust). A streamlined head 203 (drag-reducing leading edge, usually integrally machined) is formed at the end of the outlet cavity 201 away from the nozzle 202 to reduce wind resistance. A guide hole 112 (liquid introduction channel) is opened on the heavy phase weir plate 106, which communicates with the C-shaped path inlet. Below the heavy phase weir plate 106, guide plates 205 (annular baffles) are installed at intervals and fixed to each other. A guide cavity (annular gap liquid collection area) is formed between the heavy phase weir plate 106 and the guide plates 205 to collect the fluid on the wall side of the drum 105. The drum 105 is provided with a conical widening section 105A below the heavy phase weir plate 106 (this structure is designed to promote accelerated liquid flow and is usually machined integrally with the drum 105) so that the liquid inside and outside the drum 105 flows accelerated and is deflected into the guide hole 112 under the action of the guide plates 205. The cross-section of the guide hole 112 is a cone with a diameter that gradually increases from bottom to top (an enlarged inlet to facilitate smooth fluid entry and stabilize the flow velocity).

[0025] The working principle of Example 2 is as follows: First, the heavy phase and light phase raw materials enter the annular flow channel between the premixing chamber 301 and the outer shell 103 through the heavy phase inlet 113 and the light phase inlet 114, respectively. Under the guidance and obstruction of the mixing baffle 305, the two-phase fluids flow axially downwards and generate initial tangential shear. At this time, the drive motor 102 starts, driving the drum 105 and the premixing chamber 301 fixedly connected to it to rotate synchronously at high speed through the rotating shaft 104. The spiral guide 306 provided on the outer wall of the premixing chamber 301 rotates accordingly, and its spiral blades generate a downward axial pumping force when rotating, forcing the fluid in the annular gap to be conveyed downwards, thereby ensuring that the material can be effectively captured by the centripetal impeller 302 located at the bottom. The centripetal impeller 302 rotates at high speed with the rotating shaft 104, generating a significant negative pressure in its inlet center region, which powerfully pumps the downward-conveyed two-phase fluid upwards into the center inlet at the bottom of the premixing chamber 301. This pumping process, accompanied by intense shearing and entrainment, completes the first discretization and preliminary mixing of the heavy and light phases.

[0026] Subsequently, the material entering from the bottom center of the premixing chamber 301 is immediately captured and subjected to a second high-intensity mixing by the coaxially mounted, suspended conical mixing impeller 303. The high-speed rotation of this impeller generates intense turbulence. Its unique conical structure not only enhances radial shear strength but also generates an axial force pointing towards the central axis of the drum 105, preferentially guiding the lighter, less dense phase upwards. This design ensures that the lighter phase tends to reach a higher liquid level before entering the main separation zone, effectively preventing secondary mixing and backmixing of the lighter phase with the settled heavier phase at the bottom of the drum 105, thus laying a fluid dynamic foundation for clear phase interface separation. Through the dedicated premixing chamber 301 located at the front end of the drum 105, this system completes two-stage progressive mixing within a compact, relatively enclosed high-intensity shear field before the material enters the main drum 105, significantly increasing the mass transfer surface area and mixing uniformity, creating excellent conditions for subsequent efficient extraction reactions.

[0027] Then, the mixture in the premixing chamber 301 is further sheared and homogenized by the reinforced stirring impeller 304 fixed inside the chamber, completing the third final mixing. Under the action of strong centrifugal force, some of the fluid that may be insufficiently mixed and rises along the inner wall of the premixing chamber 301 is forced to flow back to the middle of the chamber by the pressure impeller 307 rotating at the top of the chamber, forming an internal circulation to ensure that nothing is missed. Finally, all materials are sucked in by the feed impeller 115 at the bottom of the drum 105 and smoothly enter the main separation zone of the drum 105. The fluid entering the drum 105 rotates at high speed with the drum 105 and gradually rises along the axis. When it enters the tapered widening section 105A of the upper half of the drum 105 with a gradually expanding diameter, the separation environment is optimized in two ways: first, the separation radius increases, and according to the centrifugal force formula F_c = mω²r, the separation factor is significantly improved, and the separation driving force is enhanced; second, the tapered space provides a larger sedimentation storage volume for the heavy phase, reducing the risk of interface disturbance.

[0028] Inside the drum 105, the fluid rapidly stratifies under a centrifugal force field several times stronger than gravity: the heavy phase is thrown against the drum wall and flows upward along it; the light phase accumulates in the central region. The opening of the light phase weir 107 extends precisely to the light phase accumulation area, guiding the separated light phase to the light phase collection chamber 109, and finally discharging it from the light phase outlet 111. The heavy phase continues to rise along the drum wall, and after passing the top of the heavy phase weir 106, it is effectively captured by the guide plate 205 located on the separation side of the weir. The guide plate 205 smoothly guides the high-speed heavy phase fluid into the guide hole 112 (its tapered design, smaller at the bottom and larger at the top, facilitates fluid acceleration and stabilizes the flow rate), and then injects it into the outlet chamber 201. This chamber is precisely arranged along the tangential direction of the rotation circle of the drum 105 and is the core of kinetic energy conversion.

[0029] Within the outlet cavity 201, the high-speed fluid first impacts the fixed impact baffle 204, precisely splitting into two streams. One stream deflects to the left, entering the lower half of the nozzle 202, but the lower half of the nozzle 202 is closed, so subsequent water flow can only come from the other side; the other stream deflects to the right, first impacting the inclined surface 203A within the head 203. The inclined surface 203A decomposes the normal impact force of the fluid, generating a tangential component force, directly creating a positive driving torque on the cavity (i.e., the rotating drum 105). Subsequently, this stream of fluid bypasses the impact baffle 204 and is ejected from the upper half of the nozzle 202. All fluid ejected from the nozzle 202 has its ejection direction set opposite to the rotation direction of the rotating drum 105. According to Newton's third law, the reaction force generated by the jet stream again applies a strong positive torque to the rotating drum 105. The torque generated by the impact of the inclined plane 203A and the jet thrust is superimposed in the same direction, forming a significant auxiliary driving effect, directly reducing the load on the main drive motor 102 and achieving significant energy saving. The streamlined design of the cavity head 203 effectively reduces the wind resistance loss generated by friction with air during high-speed rotation. This invention has significant advantages over traditional centrifugal separators 100100. Conventional designs typically reduce the flow rate of the separated liquid to prevent the high-speed liquid jet from generating reverse impact resistance on the drum 105, thereby avoiding overload or mechanical damage to the drive motor 102. However, this approach inherently consumes the kinetic energy carried by the liquid, resulting in energy waste and limiting the equipment's ability to handle high-flow-rate materials.

[0030] This invention innovatively incorporates a conical widening section 105A in the heavy phase outlet 110 region of the drum 105. This structure is not for deceleration, but rather utilizes the principle of centrifugal acceleration to further increase the flow velocity of the heavy phase liquid near the wall of the drum 105 as it flows through the conical widening section 105A. The accelerated high-speed liquid is guided by the guide plate 205, enters the C-shaped flow channel of the kinetic energy recovery device through the conical guide hole 112 on the heavy phase weir plate 106, and finally is ejected at high speed from the tangential nozzle 202 in the opposite direction to the rotation of the drum 105. According to the principle of conservation of momentum, the reaction torque generated by this reverse injection is consistent with the rotation direction of the drum 105, thereby actively propelling the drum 105 to rotate and achieving effective recovery and reuse of the liquid's kinetic energy.

[0031] Therefore, this invention not only avoids viewing liquid kinetic energy as a negative factor to be suppressed, but also transforms it into auxiliary driving energy, significantly reducing the load on the drive motor 102 and improving the overall energy efficiency. Simultaneously, because the liquid is efficiently extracted and participates in work, it also reduces turbulence and liquid film accumulation within the cavity, which is beneficial for improving separation clarity and processing throughput. This design concept breaks through the traditional passive protection approach of "deceleration and anti-impact," achieving a technological leap from "energy consumption" to "energy empowerment."

[0032] In summary, this embodiment ensures mass transfer and extraction efficiency through a compact and semi-enclosed stepped premixing system at the feed end. The design of the tapered drum 105 with a gradually expanding diameter optimizes the centrifugal separation force field and phase interface stability. Finally, a tangential kinetic energy recovery device integrated into the weir plate efficiently converts the kinetic energy of the high-pressure heavy phase fluid into mechanical energy to drive the rotation of the drum 105. The entire system achieves seamless integration and synergistic effect of the three functional modules: mixing, separation, and energy recovery, resulting in a dual improvement in system operating efficiency and energy utilization efficiency.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A feeding device, characterized in that, The premixing chamber (301) is fixedly fitted in the inlet area of ​​the drum (105). The drum (105) is arranged inside the outer shell (103). A rotating shaft (104) is coaxially arranged in the middle of the drum (105). The rotating shaft (104) passes through the drum (105) and extends into the premixing chamber (301), and a secondary mixing device is provided at its end. A primary mixing device is provided at the bottom of the premixing chamber (301). The drum (105), the premixing chamber (301), and the rotating shaft (104) are all driven by the same power source to rotate, so that the material is sucked into the premixing chamber (301) through the gap between the outer shell (103) and the premixing chamber (301) and then undergoes secondary mixing through the primary mixing device and the secondary mixing device before entering the drum (105).

2. The feeding device according to claim 1, characterized in that, The secondary mixing device is configured as a mixing impeller (303) fixedly installed at the bottom end of the rotating shaft (104) and synchronously driven by the rotating shaft (104). The primary mixing device is configured as a centripetal impeller (302) fixedly installed at the bottom end of the premixing chamber (301) and synchronously driven by the premixing chamber (301). An enhanced stirring impeller (304) is fixedly installed on the inner wall of the premixing chamber (301) so that the enhanced stirring impeller (304) is synchronously driven to rotate by the premixing chamber (301) to enhance the stirring effect.

3. A feeding device according to claim 1 or 2, characterized in that, The bottom portion of the drum (105) extends into the premixing chamber (301) and is provided with a feed impeller (115) for pumping fluid into the drum (105).

4. A feeding device according to claim 1 or 2, characterized in that, It also includes a spiral feeder (306), which is fixedly connected to the outer wall of the premixing chamber (301) so that the spiral feeder (306) is synchronously driven to rotate by the premixing chamber (301) to accelerate the downward flow of liquid in the gap between the outer shell (103) and the premixing chamber (301).

5. A feeding device according to claim 4, characterized in that, It also includes a mixing baffle (305), which is fixedly installed on the top of the outer wall of the premixing chamber (301) to cooperate with the spiral feeder (306) to prevent the liquid in the gap between the outer shell (103) and the premixing chamber (301) from flowing upward.

6. A feeding device according to claim 1, characterized in that, It also includes a pressing impeller (307), which is fixedly connected to the top of the inner wall of the premixing chamber (301) so that the liquid on the outside of the premixing chamber (301) is rotated to the middle of the premixing chamber (301) and sucked in.

7. A feeding device according to claim 2, characterized in that, It also includes a frame (101) for manufacturing the outer shell (103), a drive motor (102) is fixedly mounted on the frame (101), the top end of the rotating shaft (104) is rotatably mounted on the frame (101), the actuating end of the drive motor (102) is connected to the rotating shaft (104) for transmission, and the drum (105) is fixedly connected to the rotating shaft (104) to achieve synchronous rotation.

8. A feeding device according to claim 2, characterized in that, The longitudinal section of the mixing impeller (303) is a cone shape with a diameter that gradually increases from bottom to top.

9. A centrifugal separation device, characterized in that, The device includes a feeding device as described in any one of claims 1-8; it also includes a frame (101) and a drive motor (102) mounted on the frame (101), a housing (103) is fixedly installed inside the frame (101), a drum (105) is rotatably mounted inside the housing (103) via a rotating shaft (104), the working end of the drive motor (102) is connected to the rotating shaft (104) for transmission, and a phase inlet (11) is provided on both sides of the bottom of the housing (103). 3) From top to bottom, a heavy phase weir plate (106) and a light phase weir plate (107) are sequentially arranged on the inner wall of the top of the drum (105). A heavy phase collection chamber (108) is formed above the heavy phase weir plate (106), and a light phase collection chamber (109) is formed above the light phase weir plate (107). A heavy phase outlet (110) is formed on the heavy phase collection chamber (108), and a light phase outlet (111) is formed on the light phase collection chamber (109). The heavy phase weir plate (106) is circumferentially arranged with multiple outlet cavities (201) that rotate synchronously with the heavy phase weir plate (106). The outlet cavity (201) is divided into a double-layer structure by an impact baffle plate (204), so that the fluid inside the outlet cavity forms a C-shaped path. The outlet of the C-shaped path forms a nozzle (202) for ejecting fluid in the opposite direction to the rotation of the heavy phase weir plate (106), so that the reaction force of the fluid acts positively on the rotation of the outlet cavity (201). The reverse bend of the C-shaped path forms a force surface for positively acting on the rotation of the outlet cavity (201) under the impact of the fluid.

10. The centrifugal effluent kinetic energy recovery device according to claim 9, characterized in that, The force-bearing surface is an inclined surface (203A) set on the inner wall of each outlet cavity (201), and the direction of the incline (203A) points to the nozzle (202) side; the spray direction of the nozzle (202) is towards the tangent direction of the circle formed by the rotation path of the outlet cavity (201); the heavy phase weir plate (106) is provided with a guide hole (112) that communicates with the C-shaped path inlet; guide plates (205) with fixed positions are installed at intervals below the heavy phase weir plate (106), and a guide cavity for receiving the fluid on the wall side of the drum (105) is formed between the heavy phase weir plate (106) and the guide plate (205). The drum (105) is provided with a conical widening part (105A) below the heavy phase weir plate (106) so that the liquid inside and outside the drum (105) accelerates the flow and is reversed into the guide hole (112) under the action of the guide plate (205).

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