Dynamic adjustable flotation concentrate dense medium separation device

Abstract

The invention relates to the technical field of concentrate dense medium separation, and discloses a dynamic adjustable flotation concentrate dense medium separation device which comprises a first cyclone, in the first cyclone, pulse airflow provided by an air compressor is sprayed out in the tangential direction through an arc-shaped flow guide shell, a threaded pipe and a one-way valve, and coal briquettes are impacted and adhered through airflow shearing force; meanwhile, airflow pushes a flow blocking disc of a scattering assembly to rotate, a convex block on a first connecting rod is driven to intermittently extrude a T-shaped block and conical teeth, the conical teeth move up and down on the outer wall of a connecting pipe shell, undissociated clean coal, middling coal and gangue adherends in a centrifugal force field are further scattered through mechanical impact force, a threaded pipe is driven to rotate in cooperation with an electric telescopic rod, and the undissociated clean coal, middling coal and gangue adherends are scattered. The jet angle of the air flow is dynamically adjusted, flow field requirements under different coal qualities are met, it is ensured that dissociated clean coal is rapidly gathered towards the axis and ascends in an accelerated mode along with the inner spiral flow, secondary mixing of the dissociated clean coal and gangue is reduced, the dissociated clean coal finally enters the second cyclone through the conveying pipe, and the clean coal recovery rate is effectively increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concentrate heavy medium separation, and particularly relates to a dynamically adjustable flotation concentrate heavy medium separation device. BACKGROUND

[0002] In the coal washing industry, heavy medium separation is a widely used efficient coal separation technology, and the core equipment, heavy medium cyclone, plays a key role in the raw coal separation process. The traditional heavy medium cyclone faces many problems in actual application. From the perspective of separation efficiency, for some raw coal with high humidity and uneven particle size distribution, fine coal and sticky substances are prone to agglomeration, which makes it difficult to effectively separate the coal that sticks together during the separation process. The clean coal and gangue cannot be fully separated, which reduces the clean coal recovery rate and increases the ash content of the clean coal, affecting the product quality. In terms of equipment operation stability, when the mixture of the initial heavy medium suspension and the raw coal is added, the raw coal particles may move disorderly under the action of gravity and feed impact force due to the lack of a stable cyclone field. The overflow pipe is easily blocked by large particles or particle groups, affecting the normal start and subsequent separation process of the equipment. In addition, the raw coal conveying pipeline is often blocked due to material accumulation at the corner, diameter change and other positions, affecting the continuity and stability of the feed, and thus reducing the overall separation efficiency. From the limitation of the separation principle, the traditional heavy medium cyclone mainly relies on the cyclone separation method of centrifugal field and gravity field, and has limited processing capacity for sticky coal blocks.

[0003] For example, the Chinese patent with the publication number CN220657872U discloses a three-product heavy medium cyclone with a flow guide structure. The raw coal is put into the raw coal feed inlet, the medium is injected along the medium inlet, the clean coal flows out along the clean coal discharge pipe, and the mixture of medium coal and gangue enters the flow guide pipe along the overflow pipe. The internal rotating blades are rotated by starting the motor, which promotes the uniform flow of the mixture from the inside of the flow guide pipe into the inside of the second cyclone. The coal and gangue are separated from the medium coal outlet and the gangue outlet. Thus, the separation is completed.

[0004] For the above and existing related technologies, the inventors believe that the following defects often exist: The humidity and particle size distribution of the raw coal during the conveying process are uneven, which may cause the agglomeration of fine coal and sticky substances. In addition, the resistance at the corner, diameter change and other positions of the conveying pipeline easily causes material accumulation and blockage of the pipeline, affecting the continuity and stability of the feed, and thus reducing the separation efficiency. At the same time, due to factors such as surface properties and humidity, part of the coal sticks together. The traditional cyclone relies solely on the cyclone separation method of centrifugal field and gravity field, which has limited ability to break the adhesion structure. The clean coal and gangue in the sticky coal block cannot be fully separated, which reduces the clean coal recovery rate and increases the ash content of the clean coal. SUMMARY

[0005] The technical problem solved by the present application is that in the prior art, some coal mines are prone to adhere to each other, resulting in the disadvantages of reduced clean coal recovery rate and increased clean coal ash content.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a dynamic adjustable flotation concentrate heavy medium separation device, comprising a first cyclone, one end of the first cyclone being connected with a second cyclone, both of which together constitute a three-product heavy medium cyclone, the specific model of the three-product heavy medium cyclone being 3-JHC1450 / 1030G type pressureless feeding three-product heavy medium cyclone, in the process of coal washing, a single low-density suspension is used as a separation medium to separate 50-0mm raw coal into clean coal, medium coal and gangue at one time.

[0007] Preferably, the first cyclone comprises a cylinder shell one, a bottom flow port being installed through the lower end of the cylinder shell one, a fixed support being fixedly installed at the lower end of the cylinder shell one, a feeding port being formed at the upper end of the cylinder shell one, an inlet pipe being formed through the outer wall of the upper end of the cylinder shell one, and the cylinder shell one being connected with the second cyclone through the inlet pipe.

[0008] Preferably, an overflow pipe is fixedly installed inside the cylinder shell one, a conveying pipe being fixedly installed at the upper end of the overflow pipe, the overflow pipe being connected with the conveying pipe, and the conveying pipe being connected with the inlet pipe, when the raw coal and the heavy medium suspension enter the cylinder shell one along the tangent direction at a certain pressure and speed, a high-speed rotating flow field is quickly formed, under the comprehensive action of centrifugal force, gravity and internal friction of the fluid, the flow field is differentiated into outer spiral flow and inner spiral flow, in the initial state, the raw coal and the suspension are fed into the first cyclone along the tangent direction at a certain pressure, the clean coal has relatively small density, is discharged from the conveying pipe to the inlet pipe along the inner spiral flow upward, the gangue and the medium coal have relatively large density, are discharged from the bottom flow port along the outer spiral flow downward, so that the separation of different quality coal and gangue is realized, the clean coal is discharged from the inlet pipe to the second cyclone for secondary separation, in the second cyclone, the centrifugal field is continuously used to separate the material, at this time, part of the medium coal and the clean coal in the overflow product of the first cyclone are further separated, the medium coal with relatively large density is thrown to the wall, moves downward along the outer spiral flow and is discharged from the bottom flow port of the second cyclone, and the clean coal with relatively small density is gathered near the shaft, moves upward along the inner spiral flow and is discharged from the conveying pipe of the second cyclone to become the final clean coal product.

[0009] Preferably, the second cyclone has the same structure as the first cyclone.

[0010] Preferably, the inner part of the barrel shell one is fixedly installed with an airflow auxiliary mechanism, the airflow auxiliary mechanism comprises an air compressor, the specific model of the air compressor is Copeland GA37VSD+, the air compressor is located at the lower end of the outer wall of the barrel shell one and is fixedly connected therewith, the output end of the air compressor is fixedly installed with an arc-shaped flow guide shell through a communication pipe, the arc-shaped flow guide shell is communicated with the air compressor, two groups of connecting pipes are installed through the lower end of the arc-shaped flow guide shell, the lower ends of the two groups of connecting pipes are all penetrated through the barrel shell one and are rotatably installed with connecting blocks, the connecting blocks are fixedly installed with threaded pipes on one side, the threaded pipes are communicated with the connecting pipes, the pipe walls of the threaded pipes close to the inner wall of the barrel shell one are all provided with air exhaust holes, the positions of the air exhaust holes are all fixedly installed with check valves, the opening directions of the check valves and the air exhaust holes are all inclined to the bottom flow port side along the tangent direction of the cyclone by 15°, after the raw coal and the suspension are given into the first cyclone along the tangent direction at a certain pressure, a certain amount of high-pressure gas is intermittently introduced into the threaded pipes by starting the air compressor, the airflow is sprayed out through the check valves, the pulse airflow is sprayed out along the cyclone direction, the cyclone energy is supplemented, the downward power of the outer spiral flow is strengthened, the discharge efficiency of the gangue and the medium coal is improved, at the same time, the shear and collision effects of the airflow are utilized to assist in dispersing the adhered coal blocks, at the same time, the airflow impact centrifugal field is utilized to disturb the centrifugal field, the suspension density can be temporarily and locally reduced by controlling the airflow frequency and pressure, the coal particles after dissociation are rapidly gathered to the shaft, re-agglomeration is avoided, at the same time, the cyclone energy of the airflow is increased, the coal particles are also driven to move upward along the inner spiral flow at a high speed, because the energy of the inner spiral flow is enhanced, the ascending speed is increased by 20%-30% than that of the traditional cyclone, the residence time of the coal particles in the cyclone is shortened, and the secondary mixing with the gangue is reduced.

[0011] Preferably, the inner sides of the two groups of threaded pipes are all fixedly installed with dispersing assemblies, one end of the dispersing assembly is rotatably connected with the overflow pipe.

[0012] Preferably, the dispersing assembly comprises a flow resistance disc, the flow resistance disc is located at the position corresponding to the check valve in the interior of the threaded pipe, the diameter of the flow resistance disc is smaller than the inner diameter of the threaded pipe, one end of the flow resistance disc is fixedly installed with a connecting rod one, one end of the connecting rod one penetrates through the threaded pipe, a connecting pipe shell is rotatably installed on the outer side of the connecting rod one, the connecting pipe shell is fixedly connected with the outer wall of the threaded pipe through a connecting rod two, a plurality of tapered teeth are slidably arranged on the outer wall of the connecting pipe shell, a T-shaped block is fixedly installed at the lower end of the tapered teeth, the T-shaped block is slidably connected with the connecting pipe shell, a plurality of elastic members one are fixedly installed between the T-shaped block and the inner wall of the connecting pipe shell, the elastic members one are fixedly connected with the inner wall of the connecting pipe shell, and the outer wall of the connecting rod one is provided with a protruding block corresponding to the T-shaped block.

[0013] Preferably, the connecting pipe shell is fixedly installed with a connecting rod three away from the end of the flow blocking disc, the other end of the connecting rod three is rotatably connected with the overflow pipe, the connecting rod three can rotate along the middle section, when a certain amount of high pressure gas is intermittently introduced into the interior of the threaded pipe, the high pressure gas will push the multiple sets of flow blocking discs to rotate, the rotation of the flow blocking discs drives the connecting rod one to rotate, the connecting rod one will drive the multiple sets of protruding blocks to continuously and intermittently extrude the T-shaped block and the tapered teeth during the rotation process, so that the T-shaped block and the tapered teeth continuously move up and down on the outer wall of the connecting pipe shell, the multiple sets of tapered teeth continuously move up and down to break up the adhesion of the middlings and the gangue and the middlings and the clean coal in the middle part of the centrifugal field, the separation efficiency of each layer of the centrifugal field is improved without affecting the flow of the airflow, the working time of the second cyclone is reduced, and the working efficiency of the device is greatly improved.

[0014] Preferably, the outer side of the cylinder shell one is fixedly installed with an electric telescopic rod, the driving end of the electric telescopic rod is fixedly connected with the threaded pipe through the cylinder shell one, the threaded pipe is driven to rotate along the connecting block as the axis by controlling the electric telescopic rod, and then the airflow impact angle of the one-way valve is adjusted, and the airflow blowing angle is changed to adjust the flow field distribution of different regions in the first cyclone, when it is necessary to enhance the rising power of the inner spiral flow near the axis, the airflow blowing angle can be appropriately increased, the effect of the airflow on the axis region is enhanced, the movement of the clean coal and other low-density particles to the conveying pipe is accelerated, and when it is necessary to strengthen the conveying capacity of the outer spiral flow to the gangue and other high-density particles, the airflow blowing angle can be adjusted to be more conducive to enhancing the direction of the outer spiral flow, so that the gangue is discharged to the underflow port more quickly. Different airflow blowing angles can impact the adhered raw coal particles from multiple directions, if the airflow blowing angle is single, some particles may be difficult to be effectively broken up due to being in a specific position, by adjusting the airflow blowing angle, the airflow can act on the adhered particles from different directions, the impact and shear force on the particles are increased, the adhesion structure between the particles is more comprehensively destroyed, and therefore a better breaking up effect is realized, and the clean coal and the gangue and the middlings are fully separated.

[0015] Preferably, the upper end opening and the lower end opening of the feeding pipe are respectively communicated with the conveying pipe and the second cyclone.

[0016] Preferably, one side of the feeding pipe is fixedly installed with a driving assembly one, the driving assembly one comprises a driving motor, the shell of the driving motor is fixedly connected with the feeding pipe, the driving end of the driving motor is fixedly installed with a rotating gear, the outer side of the rotating gear is meshingly provided with a gear belt, the inner side of the gear belt is meshingly provided with another set of rotating gears, and the sides of the two sets of rotating gears are both provided with a guide plate.

[0017] Preferably, one side of the feeding pipe is fixedly provided with a driving assembly two, the driving assembly two is same in structure with the driving assembly one, and one side of two groups of rotating gears contained in the driving assembly two is fixedly provided with a scattering roller, the scattering roller is located between the adjacent two groups of guide plates, when the clean coal and the medium coal enter the second cyclone through the conveying pipe and the feeding pipe, the control of the discharging speed is realized by adjusting the rotating angle of the guide plate, and the preliminary scattering of the clean coal and the medium coal adhesion is realized by driving the scattering roller to rotate, so that the separation efficiency of the second cyclone is improved.

[0018] Technical effects and advantages of the present application: In the present application, the discharging speed is adjusted by the guide plate of the driving assembly one at the feeding pipe, and the preliminary treatment of the preliminary agglomerates is realized by the scattering roller of the driving assembly two, so that the risk of blockage of the conveying pipe caused by material accumulation is reduced from the source, in the first cyclone, the pulse airflow provided by the air compressor is sprayed along the tangent direction through the arc-shaped guide housing, the threaded pipe and the one-way valve, the pulse airflow not only supplements the cyclone energy and strengthens the power of the outer spiral flow and the inner spiral flow, but also impacts the adhesion coal block by using the airflow shear force, at the same time, the airflow drives the resistance disc of the scattering assembly to rotate, intermittently extrudes the convex block on the connecting rod one and the T-shaped block and the conical gear, and moves the conical gear up and down on the outer wall of the connecting pipe shell, so that the adhesion of the clean coal, the medium coal and the gangue in the centrifugal field is further scattered by the mechanical impact force, the threaded pipe is driven to rotate by the electric telescopic rod, the airflow injection angle is dynamically adjusted, the flow field demand under different coal qualities is adapted, the clean coal after dissociation is ensured to quickly gather around the shaft and accelerate upward along the inner spiral flow, the secondary mixing with the gangue is reduced, the clean coal is highly dispersed by the pretreatment and the primary separation before entering the second cyclone through the conveying pipe, the precision and the efficiency of the secondary separation are greatly improved, the ash content of the clean coal is effectively reduced, and the clean coal recovery rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The disclosed content of the present application will be explained with reference to the drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the protection scope of the present application. In the drawings, the same reference signs are used to refer to the same parts.

[0020] Figure 1 The schematic diagram of the overall structure of the device of the present application Figure 1 .

[0021] Figure 2 The schematic diagram of the overall structure of the device of the present application Figure 2 .

[0022] Figure 3 The schematic diagram of the overall structure of the first cyclone of the present application Figure 1 .

[0023] Figure 4 The schematic diagram of the overall structure of the first cyclone of the present application Figure 2 .

[0024] Figure 5 Schematic diagram of internal structure of barrel shell of the present application Figure 1 .

[0025] Figure 6 Schematic diagram of internal structure of barrel shell of the present application Figure 2 .

[0026] Figure 7 Schematic diagram of air flow auxiliary mechanism structure of the present application.

[0027] Figure 8 Schematic diagram of scattering assembly structure of the present application.

[0028] Figure 9 Schematic diagram of enlarged structure of Figure A of the present application.

[0029] Figure 10 Schematic diagram of inlet pipe structure of the present application.

[0030] Figure 11 Schematic diagram of internal structure of inlet pipe of the present application.

[0031] Figure 12 Schematic diagram of outer wall part structure of inlet pipe of the present application.

[0032] Legend: 1, first cyclone; 11, barrel shell one; 111, underflow port; 112, conveying pipe; 113, feed inlet; 114, inlet pipe; 1141, upper end opening; 1142, lower end opening; 115, overflow pipe; 116, driving assembly one; 1161, driving motor; 1162, gear belt; 1163, rotating gear; 1164, guide plate; 117, driving assembly two; 1171, scattering roller; 12, fixed support; 13, air flow auxiliary mechanism; 131, air compressor; 132, arc-shaped flow guide shell; 133, connecting pipe; 134, connecting block; 135, threaded pipe; 1351, one-way valve; 136, scattering assembly; 1361, choke disc; 1362, connecting rod one; 1363, connecting pipe shell; 1364, protruding block; 1365, conical tooth; 1366, T-shaped block; 1367, elastic member one; 1368, connecting rod three; 1369, connecting rod two; 137, electric telescopic rod; 2, second cyclone. DETAILED DESCRIPTION

[0033] It is easy to understand that, according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary description of the technical scheme of the present application, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the present application.

[0034] Referring to Figures 1-3 As shown in the figure, the present application provides a technical solution: a dynamic adjustable flotation concentrate heavy medium separation device, comprising a first cyclone 1, one end of the first cyclone 1 is connected with a second cyclone 2, both of which together constitute a three-product heavy medium cyclone, the specific model of the three-product heavy medium cyclone is 3-JHC1450 / 1030G type pressureless feeding three-product heavy medium cyclone, in the process of coal washing, a single low-density suspension is used as the separation medium, and 50-0mm raw coal is once separated into clean coal, medium coal and gangue.

[0035] Referring to Figures 3-4 As shown in the figure, in the present embodiment: the first cyclone 1 comprises a cylinder shell one 11, a bottom flow port 111 is installed through the outside of the lower end of the cylinder shell one 11, a fixed support 12 is fixedly installed at the lower end of the cylinder shell one 11, a feed inlet 113 is formed at the upper end of the cylinder shell one 11, and a feeding pipe 114 is formed through the outer wall of the upper end of the cylinder shell one 11. The cylinder shell one 11 is connected with the second cyclone 2 through the feeding pipe 114.

[0036] Referring to Figures 3-6 As shown in the figure, in the present embodiment: the inside of the cylinder shell one 11 is fixedly installed with an overflow pipe 115, the upper end of the overflow pipe 115 is fixedly installed with a conveying pipe 112, the overflow pipe 115 is connected with the conveying pipe 112, and the conveying pipe 112 is connected with the feeding pipe 114. When the raw coal and the heavy medium suspension enter the cylinder shell one 11 along the tangent direction at a certain pressure and speed, a high-speed rotating flow field will be quickly formed, and under the comprehensive action of centrifugal force, gravity and internal friction of the fluid, etc., the flow field will be differentiated into outer spiral flow and inner spiral flow. In the initial state, the raw coal and the suspension are given into the first cyclone 1 along the tangent direction at a certain pressure, the clean coal has a relatively small density, is discharged from the conveying pipe 112 to the feeding pipe 114 along the inner spiral flow upward, and the gangue and the medium coal have a relatively large density, are discharged from the bottom flow port 111 along the outer spiral flow downward, so as to realize the separation of different quality coal and gangue. The clean coal is discharged from the feeding pipe 114 to the second cyclone 2 for secondary separation. In the second cyclone 2, the centrifugal field is continuously used to separate the materials. At this time, part of the medium coal and the clean coal in the overflow product of the first cyclone 1 is further separated. The medium coal with a relatively large density is thrown to the wall and moves downward along the outer spiral flow and is discharged from the bottom flow port 111 of the second cyclone 2. The clean coal with a relatively small density is gathered near the shaft and moves upward along the inner spiral flow and is discharged from the conveying pipe 112 of the second cyclone 2, becoming the final clean coal product.

[0037] Referring to Figures 1-3 As shown in the figure, in the present embodiment: the second cyclone 2 has the same structure and composition as the first cyclone 1.

[0038] Referring toFigures 5-7 As shown in this embodiment: an airflow auxiliary mechanism 13 is fixedly installed inside the outer shell 11. The airflow auxiliary mechanism 13 includes an air compressor 131, specifically a KEPCO GA37VSD+. The air compressor 131 is located at the lower end of the outer wall of the outer shell 11 and is fixedly connected to it. An arc-shaped guide shell 132 is fixedly installed at the output end of the air compressor 131 through a connecting pipe. The arc-shaped guide shell 132 is connected to the air compressor 131. Two sets of connecting pipes 133 are installed through the lower end of the arc-shaped guide shell 132. The lower ends of both sets of connecting pipes 133 penetrate the outer shell 11 and are rotatably mounted with connecting blocks 134. A threaded pipe 135 is fixedly installed on one side of the connecting block 134 and is connected to the connecting pipe 133. An exhaust hole is opened on the pipe wall of the threaded pipe 135 near the inner wall of the outer shell 11. A one-way valve 1351 is fixedly installed at the position of each exhaust hole. The exhaust port opening is inclined at 15° towards the bottom outlet 111 along the tangent of the hydrocyclone. After the raw coal and suspension are fed into the first hydrocyclone 1 at a certain pressure along the tangent, a certain amount of high-pressure gas is intermittently introduced into the threaded pipe 135 by starting the air compressor 131. This causes the airflow to be ejected through the one-way valve 1351. The pulsed airflow is ejected in the swirling direction, supplementing the swirling energy and strengthening the downward force of the outer spiral flow. This improves the discharge efficiency of gangue and middlings. At the same time, the shearing and collision effects of the airflow help to break up the adhering coal lumps. Simultaneously, the airflow impacts the centrifugal force field, disturbing it. By controlling the airflow frequency and pressure, the density of the suspension can be temporarily and locally reduced, causing the dissociated clean coal particles to quickly gather towards the axis and avoid re-agglomeration. At the same time, the increased swirling energy of the airflow also drives the clean coal particles to accelerate upward movement in the inner spiral flow. Due to the enhanced energy of the inner spiral flow, its upward speed is 20% higher than that of a traditional hydrocyclone. - 30%, shortening the residence time of clean coal particles in the hydrocyclone and reducing secondary mixing with gangue.

[0039] Reference Figures 5-7 As shown in this embodiment: a dispersing component 136 is fixedly installed on the inner side of both sets of threaded pipes 135, and one end of the dispersing component 136 is rotatably connected to the overflow pipe 115.

[0040] Reference Figures 7-9As shown, in the embodiment: the dispersing assembly 136 includes a flow blocking disc 1361 located inside the threaded pipe 135 corresponding to the position of the one-way valve 1351, the diameter of the flow blocking disc 1361 is smaller than the inner diameter of the threaded pipe 135, one end of the flow blocking disc 1361 is fixedly installed with a connecting rod one 1362, one end of the connecting rod one 1362 penetrates the threaded pipe 135, the outer side of the connecting rod one 1362 is rotatably installed with a connecting pipe shell 1363, the connecting pipe shell 1363 is fixedly connected with the outer wall of the threaded pipe 135 through a connecting rod two 1369, the outer wall of the connecting pipe shell 1363 is slidably provided with a plurality of groups of tapered teeth 1365, the lower end of the tapered teeth 1365 is fixedly installed with a T-shaped block 1366, the T-shaped block 1366 is slidably connected with the connecting pipe shell 1363, a plurality of groups of elastic members one 1367 are fixedly installed between the T-shaped block 1366 and the inner wall of the connecting pipe shell 1363, the elastic members one 1367 are fixedly connected with the inner wall of the connecting pipe shell 1363, and the outer wall of the connecting rod one 1362 is provided with a protrusion 1364 corresponding to the T-shaped block 1366.

[0041] Referring to Figures 7-9 As shown, in the embodiment: the connecting pipe shell 1363 is fixedly installed with a connecting rod three 1368 away from the flow blocking disc 1361, the other end of the connecting rod three 1368 is rotatably connected with the overflow pipe 115, the connecting rod three 1368 can rotate along the middle segment, when a certain amount of high-pressure gas is intermittently introduced into the inside of the threaded pipe 135, the high-pressure gas will push a plurality of groups of flow blocking discs 1361 to rotate, the rotation of the flow blocking disc 1361 drives the connecting rod one 1362 to rotate, and in the process of rotating the connecting rod one 1362, a plurality of groups of protrusions 1364 will continuously and intermittently extrude the T-shaped block 1366 and the tapered teeth 1365, so that they continuously move up and down on the outer wall of the connecting pipe shell 1363, and the plurality of groups of tapered teeth 1365 continuously move up and down to disperse the adhesion of middlings and gangue, middlings and clean coal in the middle of the centrifugal field, thereby improving the separation efficiency of each layer of the centrifugal field without affecting the flow of the gas flow, reducing the working time of the second cyclone 2, and greatly improving the working efficiency of the device.

[0042] Referring to Figures 5-7As shown, in the embodiment: the outer side of the barrel shell one 11 is fixedly installed with an electric telescopic rod 137, the driving end of the electric telescopic rod 137 penetrates the barrel shell one 11 and is fixedly connected with the threaded pipe 135, the threaded pipe 135 is rotated along the connecting block 134 as the axis by controlling the electric telescopic rod 137 to push, thereby adjusting the airflow impact angle of the one-way valve 1351, and changing the air blowing angle can adjust the flow field distribution of different regions in the first cyclone 1; when it is needed to enhance the upward power of the inner spiral flow near the axis, the air blowing angle can be appropriately increased to enhance the effect of the airflow on the axis region, accelerate the movement of low-density particles such as clean coal to the conveying pipe 112, and when it is needed to strengthen the conveying capacity of the outer spiral flow to high-density particles such as gangue, the air blowing angle can be adjusted to a direction more conducive to enhancing the outer spiral flow, so that the gangue is discharged to the underflow port 111 faster. Different air blowing angles can impact the adhered raw coal particles from multiple directions. If the air blowing angle is single, some particles may be difficult to be effectively dispersed due to being in a specific position. By adjusting the air blowing angle, the airflow can act on the adhered particles from different directions, increase the impact and shear force on the particles, more comprehensively destroy the adhesion structure between the particles, and thus achieve better dispersion effect and promote the complete separation of clean coal and gangue and medium coal.

[0043] Referring to Figures 3-4 , Figure 10 As shown, in the embodiment: the upper end opening 1141 and the lower end opening 1142 of the feeding pipe 114 are respectively communicated with the conveying pipe 112 and the second cyclone 2.

[0044] Referring to Figures 10-12 As shown, in the embodiment: one side of the feeding pipe 114 is fixedly installed with a driving assembly one 116, the driving assembly one 116 includes a driving motor 1161, the shell of the driving motor 1161 is fixedly connected with the feeding pipe 114, the driving end of the driving motor 1161 is fixedly installed with a rotating gear 1163, the outer side of the rotating gear 1163 is meshingly provided with a gear belt 1162, the inner side of the gear belt 1162 is meshingly provided with another group of rotating gears 1163, and one side of the two groups of rotating gears 1163 is penetrated and installed with a guide plate 1164.

[0045] Referring to Figures 10-12As shown, in the embodiment: one side of the inlet pipe 114 is fixedly installed with a driving assembly two 117, the driving assembly two 117 and the driving assembly one 116 are the same in structure and composition, one side of the two groups of rotating gears 1163 contained in the driving assembly two 117 is fixedly installed with a scattering roller 1171, the scattering roller 1171 is located between the adjacent two groups of guide plates 1164, when the clean coal and the medium coal pass through the conveying pipe 112, the inlet pipe 114 and enter the second cyclone 2, the rotation angle of the guide plate 1164 is adjusted to realize the control on the discharging speed, and at the same time, the scattering roller 1171 is driven to rotate to preliminarily scatter the clean coal and the medium coal adhesion, and the separation efficiency of the second cyclone 2 is improved.

[0046] Working principle: raw coal and heavy medium suspension enter the cylinder shell one 11 of the first cyclone 1 along the tangent direction from the feed inlet 113, form an outer spiral flow and an inner spiral flow, the gangue and the medium coal with large density are discharged from the underflow port 111 along the outer spiral flow, and the clean coal and part of the medium coal with small density are discharged from the overflow pipe 115, the conveying pipe 112 and the inlet pipe 114 along the inner spiral flow, during which the air compressor 131 of the airflow auxiliary mechanism 13 blows high-pressure gas into the screw pipe 135 through the arc-shaped guide shell 132 connecting pipe 133, the high-pressure gas is sprayed out through the one-way valve 1351 to supplement the cyclone energy and scatter the adhesion coal, at the same time, the high-pressure gas drives the resistance disc 1361 of the scattering assembly 136 to rotate, the connecting rod one 1362 drives the protruding block 1364 to extrude the T-shaped block 1366 and the conical tooth 1365 to move up and down to further scatter the adhesion, the electric telescopic rod 137 adjusts the angle of the screw pipe 135 to optimize the airflow impact effect, the guide plate 1164 of the driving assembly one 116 in the inlet pipe 114 adjusts the discharging speed, the scattering roller 1171 of the driving assembly two 117 scatters the material again and then enters the second cyclone 2, and finally the clean coal, the medium coal and the gangue are separated.

[0047] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should be within the protection scope of the present application.

Claims

1. A dynamically adjustable, float concentrate, dense medium separation apparatus, characterized by, The first cyclone is connected with the second cyclone at one end, and the two together form a three-product heavy medium cyclone. The first cyclone includes a cylinder shell one, a bottom flow port is installed through the lower end of the cylinder shell one, the cylinder shell one is connected with the second cyclone through the feeding pipe, an overflow pipe is fixedly installed inside the cylinder shell one, a conveying pipe is arranged at the upper end of the overflow pipe, and the overflow pipe is connected with the conveying pipe. An airflow auxiliary mechanism is fixedly installed inside the cylinder shell one, the airflow auxiliary mechanism includes an air compressor, the air compressor is located at the lower end of the outer wall of the cylinder shell one and is fixedly connected with the outer wall, an arc-shaped flow guide shell is fixedly installed at the output end of the air compressor through a communication pipe, the arc-shaped flow guide shell is connected with the air compressor, two groups of connecting pipes are installed through the lower end of the arc-shaped flow guide shell, the lower ends of the two groups of connecting pipes are installed through the cylinder shell one and are rotatably installed with connecting blocks, a threaded pipe is fixedly installed on one side of each connecting block, the threaded pipe is connected with the connecting pipe, exhaust holes are arranged on the pipe wall near the inner wall of the cylinder shell one, a one-way valve is fixedly installed at the position of each exhaust hole, a scattering assembly is fixedly installed inside each threaded pipe, and one end of the scattering assembly is rotatably connected with the overflow pipe.

2. The dynamically adjustable float-and-sink concentrate separation apparatus of claim 1, wherein: A fixed support is fixedly installed at the lower end of the cylinder shell one, a feeding port is arranged at the upper end of the cylinder shell one, a feeding pipe is arranged through the outer wall of the upper end of the cylinder shell one, and the conveying pipe is connected with the feeding pipe.

3. The dynamically adjustable float-and-sink concentrate separation apparatus of claim 1, wherein: The opening direction of the one-way valve is inclined to the side of the bottom flow port by 15-30 degrees along the tangent direction of the cyclone.

4. The dynamically adjustable float-and-sort concentrate dense medium separation apparatus of claim 1, wherein: The second cyclone has the same structure as the first cyclone.

5. The dynamically adjustable float-and-sort concentrate dense medium separation apparatus of claim 1, wherein: The scattering assembly includes a flow resistance disc, the flow resistance disc is located inside the threaded pipe and corresponds to the one-way valve, the diameter of the flow resistance disc is smaller than the inner diameter of the threaded pipe, a connecting rod one is fixedly installed at one end of the flow resistance disc, the connecting rod one penetrates through the threaded pipe, a connecting pipe shell is rotatably installed on the outer side of the connecting rod one, the connecting pipe shell is fixedly connected with the outer wall of the threaded pipe through the connecting rod two, a plurality of tapered teeth are slidably arranged on the outer wall of the connecting pipe shell, a T-shaped block is fixedly installed at the lower end of each tapered tooth, the T-shaped block is slidably connected with the connecting pipe shell, a plurality of elastic members one are fixedly installed between the T-shaped block and the inner wall of the connecting pipe shell, the elastic members one are fixedly connected with the inner wall of the connecting pipe shell, and protrusions are arranged at positions corresponding to the T-shaped block on the outer wall of the connecting rod one.

6. A dynamically adjustable float-and-sort concentrate dense medium separation apparatus according to claim 5, characterised in that: A connecting rod three is fixedly installed at the end of the connecting pipe shell away from the flow resistance disc, the other end of the connecting rod three is rotatably connected with the overflow pipe, and the connecting rod three can be rotated along the middle section.

7. The dynamically adjustable float-and-sort concentrate dense medium separation apparatus of claim 1, wherein: An electric telescopic rod is fixedly installed on the outer side of the cylinder shell one, and the driving end of the electric telescopic rod is fixedly connected with the threaded pipe through the cylinder shell one.

8. The dynamically adjustable float-and-sort concentrate dense medium separation apparatus of claim 2, wherein: The upper end opening and the lower end opening of the feeding pipe are respectively connected with the conveying pipe and the second cyclone.

9. A dynamically adjustable float-and-sort concentrate dense medium separation apparatus according to claim 8, characterised in that: One side of the inlet pipe is fixedly installed with a driving assembly one, the driving assembly one includes a driving motor, the shell of the driving motor is fixedly connected with the inlet pipe, the driving end of the driving motor is fixedly installed with a rotating gear, the outer side of the rotating gear is meshed with a gear belt, the inner side of the gear belt is meshed with another set of rotating gears, and one side of the two sets of rotating gears is penetrated and installed with a guide plate.

10. A dynamically adjustable float-and-sort concentrate dense medium separation apparatus according to claim 9, characterized in that: One side of the inlet pipe is fixedly installed with a driving assembly two, the driving assembly two is same in structure and composition with the driving assembly one, one side of the two sets of rotating gears contained by the driving assembly two is fixedly installed with a scattering roller, and the scattering roller is located between the adjacent two sets of guide plates.

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