A gas-liquid-solid three-phase dispersion system

Abstract

The present invention provides a gas-liquid-solid three-phase dispersion system, which relates to the technical field of mineral flotation. It includes an inclusion and a high-turbulence dissipation body. The inclusion surrounds the outside of the high-turbulence dissipation body, and the flotation machine impeller is arranged inside the high-turbulence dissipation body. The inclusion includes an annular cylinder wall, and a plurality of flow channel holes are arranged along the annular array on the cylinder wall. The high-turbulence dissipation body includes multiple groups of blade groups arranged along the annular array. Each group of blade groups includes at least two layers of blades arranged radially inside and outside, and flow channel holes are respectively arranged on each layer of blades. The high-turbulence dissipation body, the flow channel holes on the high-turbulence dissipation body, and the flow channel holes on the inclusion form a fluid channel. The present invention can solve the problems existing in the stator of the prior art, such as insufficient local gas holdup, large turbulence intensity in the upper and middle parts of the cell, which destroys the stability of the foam layer, the relative velocity difference of bubble-mineral particle collision mineralization is insufficient, and the collision mineralization scale between fine-grained minerals and bubbles does not match.

Description

Technical Field

[0001] The invention relates to the technical field of mineral flotation, in particular to a gas-liquid-solid three-phase dispersion system. Background Art

[0002] Flotation is a separation technology that utilizes the differences in physical and chemical properties of mineral surfaces (especially surface wettability) to selectively enrich one or several target minerals at the solid-liquid-gas three-phase interface, thereby achieving separation from gangue minerals. As the most important equipment in the flotation process, the flotation machine provides an excellent sorting environment for the separation and enrichment of minerals, and determines the recovery efficiency of minerals under certain process flows. During the operation of the flotation machine, as the impeller rotates, the fluid in the center area of ​​the impeller is gradually thrown out in a spiral upward, and a certain negative pressure is formed in the impeller area. The fluid around the impeller and the low-pressure air fed by the hollow shaft are continuously sucked and blown in, and are initially mixed to a certain extent in the impeller area. The fluid continuously thrown out by the impeller is further sheared and dispersed under the dispersing action of the stator. In this process, the gas is gradually sheared into small bubbles (usually 1~2mm), which increases the local gas content in the impeller-stator collision mineralization area and promotes the collision mineralization of mineral particles and bubbles; at the same time, under the guidance of the stator, the three The phase mixture flows along a fixed channel to achieve the transformation from circumferential flow to radial flow. After the radial flow flows outward to the side wall of the trough, a part of it flows downward to the bottom of the trough and re-enters the impeller area under the suction of the impeller, forming a bottom circulation in the flotation machine; a part of it flows upward to the middle and upper part of the trough, and after moving to the highest point, the flow direction changes from upward to downward and re-enters the impeller area, forming a large circulation in the upper area of ​​the flotation machine. In this process, the mineralized bubbles break away from the upper circulation flow field structure under the action of buoyancy, move upward as a whole, and form a foam layer, ultimately realizing the recovery of useful minerals.

[0003] It can be seen that the main functions of the stator include three aspects:

[0004] 1) Direct the circumferential flow generated by the rotation of the impeller into radial flow;

[0005] 2) To achieve further shear mixing of the gas-liquid-solid three-phase mixture, shear the gas to form small bubbles, and achieve collision mineralization of useful minerals and bubbles;

[0006] 3) Cooperate with the tank structure to form the upper and lower circulation flow field structure in the flotation machine.

[0007] Related patents in the prior art:

[0008] Chinese patent application CN101722113A published on June 9, 2010, discloses a stator of a direct-suspended flotation machine;

[0009] The Chinese patent application CN114602662A, which was published on June 10, 2022, discloses a stator structure and a large-scale pneumatic self-priming pulp flotation machine;

[0010] The Chinese patent CN203484235U, which was authorized and announced on March 19, 2014, discloses an improved stator device for a flotation machine;

[0011] The Chinese patent application CN104918708A, which was published on September 16, 2015, discloses a stator for a flotation machine;

[0012] The Chinese patent application CN1938097A, which was published on March 28, 2007, discloses a stator for a flotation cell;

[0013] The Chinese patent application CN105658335A, which was published on June 8, 2016, discloses a stator of a gas dispersion mechanism used in a froth flotation cell;

[0014] The Chinese patent application CN115739406A, which was published on March 7, 2023, discloses a fine-grained mineral flotation device and a flotation method, which involves a double-layer stator structure. The inner and outer double-layer stators include an inner stator and an outer stator, and the outer stator is located outside the inner stator.

[0015] Analysis of these related patents reveals that:

[0016] CN101722113A, CN114602662A, and CN203484235U are all designed for the separation of conventional-sized mineral particles, and pay more attention to functions such as the turbulent flow effect of the stator blades, the processing and installation methods of the blades, the structural strength of the overall stator, and the wear resistance.

[0017] The flotation machine stators disclosed in CN104918708A, CN1938097A, and CN105658335A are also for the separation of conventional-sized minerals. The diversion of pulp is achieved through the upper and lower closed rings of the stator, the local shear rate and turbulent intensity are increased through the openings on the stator blades, and the single shear rate is overcome by adjusting the installation position of the stator blades to achieve different shear rates of the same stator on the fluid, thereby enhancing the turbulent intensity. However, the shear rate generated by them still fails to meet the requirements for the collision mineralization of fine-grained minerals and the occurrence of microbubbles.

[0018] CN115739406A is for the separation of fine-grained minerals. The disclosed double-layer stator structure strengthens the shearing effect of the stator, which is beneficial to the generation of microbubbles. However, the upper or lower ends of the inner and outer double-layer stators are open, which is not conducive to the diversion of fluid. Moreover, the strong turbulent flow field generated by the impeller stator is likely to extend to the separation area and the foam area, which is not conducive to the low-turbulence separation of mineralized bubbles. At the same time, the three-phase mixture passing through the impeller-stator area is quickly released after leaving the impeller-stator area, and the gas holdup in the local area cannot be effectively improved.

[0019] Secondly, whether the upper ends of the stator blades are closed or not has a great influence on the upper circulation flow field of the flotation machine. The rotation of the impeller generates a spiral upward flow, which can convert the circumferential flow into a radial flow under the guiding action of the stator blades, but it is not a strictly radial flow, and it also contains a relatively large axial velocity. Therefore, closing the stator blades can inhibit the axial flow, strengthen the radial flow, reduce the turbulence intensity in the upper and middle parts of the tank body, and create a stable separation environment for the separation of mineralized bubbles.

[0020] After the gas is sheared and dispersed by the stator, it is quickly and evenly dispersed to the upper area of the tank body. The relatively open area is not conducive to the retention of gas. One of the difficulties in the recovery of fine-grained minerals is the low probability of collision and mineralization with bubbles, which is specifically manifested as the mismatch between the bubble diameter and the mineral particle diameter, the low initial kinetic energy, and the low local gas holdup. Summary of the Invention

[0021] The purpose of the present invention is to provide a gas-liquid-solid three-phase dispersion system, which can solve the problems existing in the stator of the prior art, such as insufficient local gas holdup, large turbulence intensity in the upper and middle parts of the tank body, which destroys the stability of the foam layer, insufficient relative velocity difference between the collision and mineralization of bubbles and mineral particles, and mismatch between the collision and mineralization scale of fine-grained minerals and bubbles;

[0022] The present invention provides a gas-liquid-solid three-phase dispersion system, which includes an inclusion body and a high-turbulence dissipation body. The inclusion body surrounds the outside of the high-turbulence dissipation body, and a flotation machine impeller is arranged inside the high-turbulence dissipation body; the inclusion body includes an annular barrel wall, and a plurality of flow channel holes are arranged in an annular array on the barrel wall; the high-turbulence dissipation body includes multiple groups of blade groups arranged in an annular array, and each group of blade groups includes at least two layers of blades arranged radially inside and outside, and flow channel holes are respectively arranged on each layer of blades; the high-turbulence dissipation body, the flow channel holes on the high-turbulence dissipation body and the flow channel holes on the inclusion body form a fluid channel.

[0023] Furthermore, the inclusion body further includes a support disk connected to the bottom of the barrel wall, and an upper flow-limiting disk connected to the top of the barrel wall, and the inner diameters of both the support disk and the upper flow-limiting disk are smaller than the inner diameter of the barrel wall.

[0024] Furthermore, the high turbulence dissipator also includes a bottom closed ring connected to the bottom of the blade, and an upper closed ring connected to the top of the blade, the inner and outer diameters of the bottom closed ring and the upper closed ring are consistent, and the widths of the bottom closed ring and the upper closed ring are greater than the widths of the inner and outer layers of the blades.

[0025] Furthermore, there is a circumferential spacing between adjacent blade groups to form a flow diversion and dispersion channel 1.

[0026] Furthermore, there is a circumferential spacing between the inner and outer blades of the same blade group to form a second flow diversion and dispersion channel, and the flow area of ​​the first flow diversion and dispersion channel is larger than the flow area of ​​the second flow diversion and dispersion channel.

[0027] Furthermore, the height of the flow channel holes on the outer blades of the high-turbulence dissipator is higher than the height of the flow channel holes on the inner blades, and the height of the flow channel holes on the inclusion body is higher than the height of the flow channel holes on the outermost blades.

[0028] Furthermore, the flow channel hole on the inclusion body is located between the two outermost blades.

[0029] Furthermore, the flow channel holes on the inclusion body are elongated holes, and the length direction of the flow channel holes is consistent with the axial direction; the flow channel holes on the high turbulence dissipator are elongated holes, and the length direction of the flow channel holes is consistent with the radial direction.

[0030] Furthermore, a plurality of flow channel holes are formed on the blade, and the flow channel holes are distributed in at least two rows along the width direction and in a plurality of rows along the length direction, and the flow channel holes in adjacent rows of adjacent columns are staggered.

[0031] Furthermore, the blade is an airfoil shape.

[0032] The beneficial effects of the present invention are:

[0033] (1) The present invention delays the outward dispersion of bubbles through the synergistic effect of high turbulence dissipators and inclusion structures, increases the gas content in local areas, increases the contact probability between fine minerals and bubbles, and thus increases the probability of collision mineralization;

[0034] (2) The present invention uses an inner and outer double-layer blade structure to secondary enhance the outward discharge speed, increase the initial kinetic energy of the three-phase mixture, and enhance the initial kinetic energy of the mineral particles;

[0035] (3) The collision mineralization between fine-grained minerals and bubbles requires a greater initial kinetic energy on the one hand and a certain relative velocity difference on the other hand. After the traditional stator structure diverts the three-phase mixture, it enters a relatively open flow field environment (the ratio of the stator diameter to the tank diameter is generally between 0.45 and 0.2). It is not until it collides with the tank wall that the local turbulent dissipation rate increases appropriately, while the energy dissipates slowly before reaching the wall, which is particularly unfavorable for generating the velocity difference required for the collision mineralization between fine-grained mineral particles and bubbles. In the present invention, inclusions are arranged around the high-turbulent dissipation body, which strengthens the energy dissipation and increases the local turbulent intensity, facilitating the formation of a greater collision mineralization velocity difference;

[0036] (4) The high-turbulent dissipation body and inclusion structure of the present invention construct a multiple strong shear environment for gas, promoting the generation of microbubbles. At the same time, at a relatively large jet velocity, it is conducive to promoting the precipitation of nano-bubbles, thereby generating precipitation mineralization. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 is for the present invention Figure 1 of the exploded view;

[0040] Figure 3 is the front view of the present invention;

[0041] Figure 4 is for the present invention Figure 3 of the A-A sectional view;

[0042] Figure 5 is a schematic diagram of the airfoil blade structure of the present invention;

[0043] Figure 6 is the top view of the present invention;

[0044] Figure 7 is for the present invention Figure 6 of the B-B sectional view;

[0045] Figure 8 is a schematic diagram of the flow direction of the gas-liquid mixture passing through the blade of the present invention;

[0046] Figure 9This is a schematic diagram of the flow of the gas-liquid-solid three-phase mixture in the present invention between the high-turbulence dissipation body and the inclusion body, where the solid line represents the flow direction of the pulp and the dashed line represents the flow direction of the gas;

[0047] Explanation of reference numerals:

[0048] 1 - Inclusion body; 11 - Cylinder wall; 12 - Support disc; 121 - Mounting bolt hole; 13 - Upper flow-limiting disc; 14 - Reinforcing rib plate;

[0049] 2 - High-turbulence dissipation body; 21 - Blade group; 22 - Blade; 23 - Bottom closing ring; 231 - Stator mounting hole; 24 - Upper closing ring; 25 - First diversion and dispersion channel; 26 - Second diversion and dispersion channel;

[0050] 3 - Flow channel hole; 4 - Flotation machine impeller; 5 - Fluid channel. Detailed implementation manners

[0051] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0053] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined. In addition, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0054] The main problems in the recovery of fine and ultra-fine minerals are their small particle size, light momentum, and large specific surface area. In the actual flotation process, there are problems such as low collision probability between particles and bubbles, low flotation rate, and easy entrainment. Among them, the low collision probability is the key factor affecting the recovery of ultra-fine minerals. The present invention mainly solves the following four technical problems:

[0055] 1) The problem of insufficient local gas holdup: The impeller-stator region is the main area where collision mineralization occurs. Through the synergistic effect of the high-turbulence dissipation body 2 & inclusion body 1 structure, the outward dispersion of bubbles is delayed, the gas holdup in the local area is increased, the contact probability between ultra-fine minerals and bubbles is improved, and thus the collision mineralization probability is increased;

[0056] 2) The problem that the turbulence intensity in the upper and middle parts of the cell is large and the stability of the foam layer is damaged: The double-layer wing-shaped blade 22 structure further strengthens the outward discharge velocity, increases the initial kinetic energy of the three-phase mixture, and enhances the initial kinetic energy of mineral particles. However, to a certain extent, it also increases the axial flow velocity, and the turbulence intensity in the upper and middle parts of the cell increases, which is not conducive to the separation of mineralized bubbles. The high-turbulence dissipation body 2 and inclusion body 1 structure with a closed structure further constructs a radial flow channel, ensuring a relatively stable sorting environment in the upper and middle parts of the cell.

[0057] 3) The problem of insufficient relative velocity difference for the collision mineralization of bubbles and mineral particles: The collision mineralization of ultra-fine minerals and bubbles requires, on the one hand, greater initial kinetic energy, and on the other hand, a certain relative velocity difference. After the traditional stator structure diverts the three-phase mixture, it enters a relatively open flow field environment (the ratio of the stator diameter to the cell diameter is generally between 0.45 and 0.2). It is not until it collides with the cell wall that the local turbulence dissipation rate increases appropriately, and the energy dissipates slowly before reaching the wall, which is particularly unfavorable for generating the velocity difference required for the collision mineralization of ultra-fine mineral particles and bubbles. By setting the inclusion body 1 around the high-turbulence dissipation body 2, the energy dissipation is strengthened, the local turbulence intensity is increased, and it is conducive to forming a larger collision mineralization velocity difference.

[0058] 4) The problem of mismatch in the scale of collision mineralization between ultra-fine minerals and bubbles: The high-turbulence dissipation body 2 & inclusion body 1 structure constructs a multiple strong shear environment for gas, promotes the generation of micro-bubbles, and at the same time, under a large jet velocity, it is conducive to the precipitation of nano-bubbles, thereby generating precipitation mineralization.

[0059] Example 1

[0060] Such as Figures 1 - 9As shown in the figure, the present invention provides a gas-liquid-solid three-phase dispersion system, which includes an inclusion body 1 and a high-turbulence dissipation body 2. The inclusion body 1 surrounds the outside of the high-turbulence dissipation body 2, and a flotation machine impeller 4 is arranged inside the high-turbulence dissipation body 2. The inclusion body 1 includes an annular cylinder wall 11, and a plurality of flow channel holes 3 are arranged on the cylinder wall 11 in an annular array. The high-turbulence dissipation body 2 includes multiple groups of blade groups 21 arranged in an annular array. Each group of blade groups 21 includes at least two layers of blades 22 arranged radially inside and outside. Flow channel holes 3 are respectively arranged on each layer of blades 22. The high-turbulence dissipation body 2, the flow channel holes 3 on the high-turbulence dissipation body 2, and the flow channel holes 3 on the inclusion body 1 form a fluid channel 5.

[0061] Specifically, a strongly constrained high-turbulence dissipation rate gas-liquid-solid three-phase mixing and dispersion system is composed of the high-turbulence dissipation body 2, the inclusion body 1, and the formed flow-through channel. Among them, the structure of the high-turbulence dissipation body 2 and the structure of the inclusion body 1 are coaxial, and the bottom is horizontally installed. The high-turbulence dissipation body 2 and the inclusion body 1 are fixed on the corresponding legs by means of bolt connection. The inner side of the high-turbulence dissipation body 2 is the installation space position of the flotation machine impeller 4. The schematic in the present invention is only for better understanding the function of the gas-liquid-solid three-phase dispersion system and does not belong to the part of the present invention.

[0062] The diameter of the inclusion body 1 is between 1.1 and 1.3 times the outer diameter of the high-turbulence dissipation body 2, and is adjusted according to the size of the mineral particles. The finer the particle size of the mineral particles, the smaller the diameter of the inclusion body 1. The height is between 1.05 and 1.25 times the height of the high-turbulence dissipation body 2, and it is installed coaxially with the stator structure. The flow channel holes 3 on the structure of the inclusion body 1 are located in the upper-middle region, and the shape is a long strip hole. The number of openings is the same as the number of single-layer stator blades 22. The total opening area is 1 / 8 - 1 / 4 of the area of the inclusion body 1. The starting opening position of the upper end of the long strip hole is at the 1 / 8 - 1 / 7 height position of the inclusion body 1, and the lower end is at about 1 / 2 height position of the inclusion body 1.

[0063] The structure of the high-turbulence dissipation body 2 is as Figure 2 shown in Figure 4 / 5 / 8. The overall structures of the inner and outer double-layer blades 22 are basically the same, the shape is airfoil-shaped, and the length, width, and height dimensions are the same, only the number of openings on the blades 22 is different. The openings on the blades 22 are long strip-shaped flow channel holes 3, and the number is 3 - 8. The length of the long strip-shaped flow channel holes 3 is 1 / 4 - 2 / 5 of the width of the stator blades 22, and the width is 1 / 12 - 1 / 8 of the width of the stator blades 22. The outer diameter of the inner layer of blades 22 is the same as the inner diameter of the outer layer of blades 22. There is a certain gap between the inner diameter and the outer diameter of the high-turbulence dissipation body 2 according to the volume of the flotation machine, generally in the range of 0.15 - 0.45 of the tank diameter. The larger the tank volume, the smaller this value.

[0064] Example 2

[0065] The inclusion body 1 further includes a support disc 12 connected to the bottom of the cylinder wall 11 and an upper flow-limiting disc 13 connected to the top of the cylinder wall 11. The inner diameters of both the support disc 12 and the upper flow-limiting disc 13 are smaller than the inner diameter of the cylinder wall 11. The high-turbulence dissipation body 2 further includes a bottom closing ring 23 connected to the bottom of the blade 22 and an upper closing ring 24 connected to the top of the blade 22. The inner and outer diameters of the bottom closing ring 23 and the upper closing ring 24 are the same, and the widths of the bottom closing ring and the upper closing ring are greater than the widths of the inner and outer layers of blades 22.

[0066] Specifically, the inclusion body 1 is of a cylindrical structure, and 4 reinforcing rib plates 14 are arranged on the outside, evenly distributed circumferentially to strengthen the structural strength of the cylinder wall 11. The inner diameters of the support disc 12 and the upper flow-limiting disc 13 are smaller than that of the cylinder wall 11, about 9 / 10 - 8 / 9 of the cylinder diameter, and the fluid on the wall directly enters the upper region of the tank. The outer diameters of the upper flow-limiting disc 13 and the lower support disc 12 are determined by the upper and lower widths of the reinforcing rib plates 14, and are as small as possible on the premise of ensuring strength. The lower support disc 12 is provided with 4 mounting bolt holes 121, evenly distributed circumferentially, between two reinforcing rib plates 14. The main purpose of the reinforcing rib plates 14 is to strengthen the structural strength of the cylinder wall 11, and the mounting holes are set according to the size of the equipment to ensure firm installation.

[0067] The structure of the high-turbulence dissipation body 2 includes an upper closing ring 24, a bottom closing ring 23, an annular structure arranged with inner and outer layers of radial blades 22, and a diversion and dispersion channel one 25 and a diversion and dispersion channel two 26 formed by the inner and outer layers of wing blades 22. The opening shape on the blade 22 is a long strip hole. The number of the inner and outer double layers of blades 22 is 16 - 28, evenly distributed circumferentially, and the circumferential angle between the inner and outer stator blades 22 of the same blade group 21 is 3 - 8°. The inner and outer diameters of the upper closing ring 24 and the bottom closing ring 23 of the high-turbulence dissipation body 2 are the same, completely covering the width of the stator blades 22. The bottom closing ring 23 is provided with stator mounting holes 231 to fix the high-turbulence dissipation body 2 on the corresponding legs in the flotation machine tank.

[0068] During the installation process, the bottom support disc 12 of the inclusion body 1 is horizontal with the bottom closing ring 23 of the high-turbulence dissipation body 2.

[0069] Embodiment 3

[0070] There is a circumferential spacing between adjacent blade groups 21, forming a diversion and dispersion channel one 25. There is a circumferential spacing between the inner and outer layers of blades 22 of the same blade group 21, forming a diversion and dispersion channel two 26, and the flow area of the diversion and dispersion channel one 25 is greater than the flow area of the diversion and dispersion channel two 26.

[0071] Specifically, the inner and outer blades 22 of adjacent different blade groups 21 form a first flow guiding and dispersing channel 25, and the inner and outer blades 22 of the same blade group 21 form a second flow guiding and dispersing channel 26. The second flow guiding and dispersing channel 26 has a smaller flow area. Under the guiding action of the inner wing blade 22, the three-phase flow velocity is accelerated and split into two flows by the outer wing blade 22, and the flow velocity is further enhanced. The number of blade groups 21 (inner and outer blades 22) is 16 - 28, and they are evenly distributed in the circumferential direction; the circumferential angle (i.e., the second flow guiding and dispersing channel 26) between the inner and outer stator blades 22 of the same blade group 21 is 3 - 8°.

[0072] Embodiment 4

[0073] The height of the flow channel holes 3 on the outer blades 22 of the high-turbulence dissipation body 2 is higher than the height of the flow channel holes 3 on the inner blades 22, and the height of the flow channel holes 3 on the inclusion body 1 is higher than the height of the flow channel holes 3 on the outermost blades 22. The flow channel holes 3 on the inclusion body 1 are between two outermost blades 22. The flow channel holes 3 on the inclusion body 1 are long strip holes, and the length direction of the flow channel holes 3 is consistent with the axial direction; the flow channel holes 3 on the high-turbulence dissipation body 2 are long strip holes, and the length direction of the flow channel holes 3 is consistent with the radial direction. A plurality of flow channel holes 3 are formed on the blades 22, and the flow channel holes 3 are distributed in at least two columns in the width direction and in multiple rows in the length direction, and the adjacent rows of flow channel holes 3 in adjacent columns are staggered.

[0074] Specifically, the flow channel holes 3 of the inner and outer blades 22 are located in the upper middle part of the blades 22 (within the range of 1 / 10 - 1 / 2 of the height of the blades 22), and are arranged horizontally in the length direction. The height of the holes on the inner blades 22 is 1 / 10 of the height of the blades 22 lower than that on the outer blades 22. The height of the holes on the inner and outer blades 22 is related to the oblique upward movement path of the fluid between the stator blades 22.

[0075] The length direction of the long strip flow channel holes 3 on the inclusion body 1 is consistent with the axial direction, and the highest opening position is higher than the opening position height of the outer blades 22 of the high-turbulence dissipation body 2. The long strip flow channel holes 3 are evenly arranged in the circumferential direction and are arranged between two outer blades 22 of the high-turbulence dissipation body 2.

[0076] High-turbulence dissipation body 2, with long strip holes opened on the inner and outer double-layer blades 22. The openings are located in the upper-middle part of the blades 22 (within the range of 1 / 10 to 1 / 2 of the height of the stator blades 22), and the long strip holes are horizontally arranged along the length direction. Two rows of long strip holes are opened on a single blade 22, with a total number of 3 - 8. They are arranged in an interspersed manner between layers. The distance between adjacent two long strip holes is 1 / 24 - 1 / 20 of the height of the blade 22, the parallel distance between the two rows of long strip holes is 1 / 4 - 1 / 3 of the width of the blade 22, the length of a single long strip hole is 1 / 2 - 3 / 5 of the width of the blade 22, and the width is 1 / 24 - 1 / 20 of the height of the blade 22. The openings on the inner-layer blades 22 are 1 / 10 of the height of the blade 22 lower than those on the outer-layer blades 22.

[0077] Example 5

[0078] The blade 22 is airfoil-shaped.

[0079] Specifically, both the inner and outer double-layer blades 22 are of airfoil-shaped structure, with the same external dimensions in length, width, and height, only the height of the flow channel holes 3 opened on the blades 22 is different. Under the guiding action of the inner-layer airfoil blades 22, the three-phase flow velocity is accelerated and is divided into two flows by the outer-layer airfoil blades 22, and the flow velocity is further enhanced.

[0080] The results of simulation research show that the power density in the region of the strong-constraint high-turbulence dissipation rate gas-liquid-solid three-phase mixing and dispersion system reaches 413 kW / m³, while the power density in the conventional stator region is 8 kW / m³. The locally higher high power density is conducive to the strong shear dispersion of the gas-liquid-solid three-phase mixture, forming smaller microbubbles, generating the relative movement velocity required for mineral particles and bubbles, and increasing the probability of collision mineralization. The laboratory clean water test research shows that through the results of CCD camera shooting and nanomeasurer image processing software, the bubble diameter generated by the strong-constraint high-turbulence dissipation rate gas-liquid-solid three-phase mixing and dispersion system is about 0.1 mm, which is smaller than the bubble diameter generated by the conventional stator structure and smaller than the bubble diameter generated by the standard KYF impeller.

[0081] The gas-liquid-solid three-phase dispersion system is applied to a certain fine-grained phosphorus flotation plant in Chengde area. The processing capacity of this fine-grained phosphorus flotation plant is 930 t / d, the particle size of the material with -0.038 μm accounts for 80%, and the technological process is 1 roughing, 1 scavenging, and 3 cleaning operations. There are 3 sets of 16 m³ flotation machines configured in the roughing operation. Among them, the stator structure of the 3rd flotation machine is replaced with the gas-liquid-solid three-phase dispersion system. The 1st flotation machine in the roughing operation is selected for 72-hour original concentrate and tailings sampling analysis, sampling once every 8 hours, and 9 samples are combined into a comprehensive sample for statistical analysis. The average test indicators are shown in Table 1.

[0082] Table 1 Industrial test index conditions of two different mixing and dispersion systems

[0083]

[0084] The results of the 72-hour industrial test show that the gas-liquid-solid three-phase dispersion system has higher recovery rate and beneficiation efficiency than the conventional stator structure, and is more conducive to the efficient recovery of fine-grained minerals.

[0085] The working principle of the present invention:

[0086] The inclusion 1 structure outside the high-turbulence dissipation body 2 realizes the isolation of the strong turbulent collision mineralization environment inside the inclusion 1 from the relatively low-turbulent separation environment outside the inclusion 1. The constructed fluidics environment matches the flotation kinetics environment required by fine-grained minerals, realizing the technical idea of "high-turbulence mineralization and low-turbulence separation" of fine-grained minerals. At the same time, the inclusion 1 structure delays the discharge of gas, increases the residence time of bubbles in the collision mineralization area, increases the gas holdup inside the annular closed area, and is conducive to increasing the collision mineralization probability between fine-grained minerals and bubbles.

[0087] The double-layer blade 22 structure design of the high-turbulence dissipation body 2 means that for the same fluid unit, the number of times the fluid is sheared and dispersed by the double-layer blade 22 continuously increases. At the same time, the openings on the blade 22 increase the local turbulent dissipation rate, which is conducive to reducing the diameter of bubbles and generating more micro-bubbles. At the same time, with the acceleration of the fluid by the wing blade 22, the local outward discharge flow rate increases rapidly, generating a large dynamic pressure, which is conducive to the precipitation of micro-nano bubbles, and then generating a precipitation mineralization effect, further strengthening the recovery of fine-grained minerals.

[0088] The upper and lower parts of the high-turbulence dissipation body 2 are closed by discs. The closed disc structure guides the fluid discharged obliquely upward by the impeller into a horizontal radial flow, reducing the turbulent intensity in the upper and middle parts of the tank body and forming a relatively stable separation environment for mineralized bubbles.

[0089] The long holes in the circumferential direction of the inclusion 1 realize the further shear dispersion of the gas-liquid-solid three-phase mixture, further converting the rotational flow generated by the impeller into a radial flow and realizing the efficient dispersion of gas and liquid.

[0090] The structures of the high-turbulence dissipation body 2 and the inclusion 1 increase the turbulent intensity in the areas of the high-turbulence dissipation body 2 and the inclusion 1. On the premise of unchanged energy input, a local high-turbulence area is constructed in the tank body, the power density is greatly increased, realizing the high-turbulence mineralization and low-turbulence separation of fine-grained minerals, increasing the local energy dissipation, and increasing the velocity difference required for the collision mineralization between mineral particles and bubbles.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gas-liquid-solid three-phase dispersion system, characterized in that: It comprises an inclusion and a high turbulence dissipator, wherein the inclusion surrounds the outside of the high turbulence dissipator, and the flotation machine impeller is arranged inside the high turbulence dissipator; The inclusion body comprises an annular cylinder wall, on which a plurality of flow channel holes are arranged along an annular array; the inclusion body also comprises a supporting disc connected to the bottom of the cylinder wall, and an upper flow limiting disc connected to the top of the cylinder wall, and the inner diameters of the supporting disc and the upper flow limiting disc are both smaller than the inner diameter of the cylinder wall; The high turbulence dissipator comprises a plurality of blade groups arranged along an annular array, each blade group comprises at least two layers of blades arranged radially inwardly and outwardly, and each layer of blades is provided with flow channel holes; the high turbulence dissipator also comprises a bottom closed ring connected to the bottom of the blade, and an upper closed ring connected to the top of the blade, the inner and outer diameters of the bottom closed ring and the upper closed ring are consistent, and the widths of the bottom closed ring and the upper closed ring are greater than the widths of the inner and outer layers of the blades; The high turbulence dissipator, the flow channel holes on the high turbulence dissipator and the flow channel holes on the inclusion form a fluid channel.

2. The gas-liquid-solid three-phase dispersion system according to claim 1, characterized in that: There is a circumferential spacing between adjacent blade groups to form a flow guide and dispersion channel 1.

3. The gas-liquid-solid three-phase dispersion system according to claim 2, characterized in that: There is a circumferential spacing between the inner and outer blades of the same blade group to form a second flow diversion and dispersion channel, and the flow area of ​​the first flow diversion and dispersion channel is larger than the flow area of ​​the second flow diversion and dispersion channel.

4. The gas-liquid-solid three-phase dispersion system according to claim 1, characterized in that: The height of the flow channel holes on the outer blades of the high turbulence dissipator is higher than that of the flow channel holes on the inner blades, and the height of the flow channel holes on the inclusion body is higher than that of the flow channel holes on the outermost blades.

5. The gas-liquid-solid three-phase dispersion system according to claim 1, characterized in that: The flow channel hole on the inclusion body is between the two outermost blades.

6. The gas-liquid-solid three-phase dispersion system according to claim 1, characterized in that: The flow channel holes on the inclusion body are long strip holes, and the length direction of the flow channel holes is consistent with the axial direction; the flow channel holes on the high turbulence dissipator are long strip holes, and the length direction of the flow channel holes is consistent with the radial direction.

7. The gas-liquid-solid three-phase dispersion system according to claim 1, characterized in that: The blade is provided with a plurality of flow channel holes, and the flow channel holes are distributed in at least two rows along the width direction and in a plurality of rows along the length direction, and the flow channel holes in adjacent rows of adjacent rows are staggered.

8. The gas-liquid-solid three-phase dispersion system according to claim 1, characterized in that: The blades are airfoil shaped.

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