CN110013910B - Aqueous medium sorting cyclone with online adjusted sorting density - Google Patents
Aqueous medium sorting cyclone with online adjusted sorting density Download PDFInfo
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- CN110013910B CN110013910B CN201910220362.4A CN201910220362A CN110013910B CN 110013910 B CN110013910 B CN 110013910B CN 201910220362 A CN201910220362 A CN 201910220362A CN 110013910 B CN110013910 B CN 110013910B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
- B03B5/34—Applications of hydrocyclones
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Abstract
The invention belongs to the technical field of coarse slime separation, and discloses an aqueous medium separation cyclone with online adjustment of separation density, which comprises a cylindrical shell, wherein an upper cover plate is arranged at the top of the shell, a tangential feeding pipe is arranged on the side wall of the shell, an overflow pipe positioned at the central shaft position of the shell is fixedly arranged on the upper cover plate, an annular slope bottom with a high center and a low edge is arranged at the bottom of the shell, a cylindrical underflow box is arranged below the shell, the underflow box is communicated with the inside of the shell through a central hole of the annular slope bottom, a tangential water injection pipe and a tangential underflow pipe are arranged on the side wall of the underflow box, a conical cylinder device positioned at the central shaft position of the shell is arranged in the underflow box and is connected with the underflow box through a gap adjustment device, and the gap adjustment device is used. The cyclone separator has stable internal flow field and high separation precision, can realize on-line adjustment of separation density, and can be widely applied to the field of coarse coal slime.
Description
Technical Field
The invention belongs to the technical field of coarse slime separation, and particularly relates to an aqueous medium separation cyclone with online adjustment of separation density.
Background
The water medium cyclone is commonly used for coarse slime separation in coal preparation plants. The operating principle of the water medium cyclone is that the sedimentation principle of particles in a centrifugal force field is utilized to realize the separation of the particles according to the specific gravity, and because the particles with different densities and different particle sizes have different sedimentation characteristics in the centrifugal force field, the particles with light specific gravity and part of the particles with large fine particle grade density enter an upward internal cyclone and are discharged through an overflow pipe to form a light product; the large-density particles and part of coarse-fraction small-density particles are transported to the bottom of the cyclone along the outer rotational flow of the wall of the cyclone, the particles are enriched at the bottom of the cyclone to form a self-generated medium bed layer, the particles entering the self-generated medium bed layer through the outer rotational flow under the action of centrifugal force are sorted according to density, the particles with the density less than the density of the bed layer are returned to enter the inner rotational flow again, and the particles with the density greater than the density of the bed layer penetrate through the bed layer and are discharged from a bottom flow port to form a heavy product. The water medium cyclone separated by utilizing the centrifugal force field principle has the advantages of high separation efficiency, wide separation particle size range and low lower limit of effective separation particle size.
A typical aqueous medium separation cyclone consists of a feed pipe, an overflow pipe, a cylindrical conical cylinder and a underflow port, wherein the overflow pipe is cylindrical and inserted into the cylindrical conical cylinder, which serves to reduce short-circuit flow. According to related researches, the short-circuit flow in the cyclone with the structure still accounts for about 20% of the total flow; meanwhile, the conventional aqueous medium cyclone mostly adopts a large-cone angle or a complex cone structure, but because the underflow port and the overflow pipe are on the same axis, an air column with an extremely unstable interface is formed in the center of the cyclone, so that the flow state in the cyclone is complex and unstable. And the underflow port is arranged at the center of the underflow cone, the light products returned from the underflow cannot effectively enter the ascending spiral flow, so the loss in the underflow is caused. Meanwhile, the separation effect of the conventional aqueous medium cyclone is adjusted by changing the insertion depth of the overflow pipe or changing the size of the underflow port, and due to the defects in the structure, the adjustment effect is not ideal. Therefore, designing a technical device which can effectively reduce short-circuit flow, reduce the loss of light products in underflow, stabilize a flow field, reduce the lower limit of effective separation granularity and realize the online adjustment of separation density is a technical problem to be solved in the technical field of coarse slime aqueous medium separation cyclones.
Disclosure of Invention
The invention provides an aqueous medium separation cyclone with online separation density adjustment, aiming at solving the technical problem of loss of light specific gravity products in underflow of the existing aqueous medium coarse slime separation equipment, so that an aqueous medium flow field in the cyclone is stable, the loss of light products in the underflow is reduced, and online separation density adjustment is realized.
In order to solve the technical problems, the invention adopts the technical scheme that: an aqueous medium separation cyclone with online adjustment of separation density comprises a cylindrical shell, wherein an upper cover plate is arranged at the top of the shell, a tangential feeding pipe is arranged on the side wall of the shell, and an annular slope bottom with a high center and a low edge is arranged at the bottom of the shell; an overflow pipe positioned at the central shaft of the shell is fixedly arranged on the upper cover plate; a cylindrical underflow box is fixedly arranged below the shell and is communicated with the inside of the shell through a central hole of an annular slope bottom, a tangential water injection pipe and a tangential underflow pipe are arranged on the side wall of the underflow box, and a conical cylinder device positioned at the central shaft position of the shell is arranged in the underflow box; the conical cylinder device comprises a conical part positioned above and a cylindrical part positioned below, and is connected with the underflow box through a gap adjusting device; the clearance adjusting device is used for adjusting the axial distance between the conical cylinder device and the annular slope bottom central hole.
The clearance adjusting device comprises a guide pipe, an adjusting screw rod and an adjusting hand wheel, the guide pipe is fixedly arranged at the bottom of the underflow box, a cylindrical part of the conical cylindrical device is sleeved on the guide pipe, one end of the adjusting screw rod is fixedly connected with the conical cylindrical device, and the other end of the adjusting screw rod penetrates through a threaded hole in the bottom of the underflow box to be fixedly connected with the adjusting hand wheel.
And a flow regulating valve for regulating the injection flow is arranged on the tangential water injection pipe.
The slope inclination angle of the annular slope bottom is 5 degrees.
The shell comprises an upper cylinder section, a middle cylinder section and a lower cylinder section, wherein the upper cylinder section, the middle cylinder section and the lower cylinder section are sequentially connected in a sealing mode from top to bottom, the tangential feeding pipe is arranged on the side wall of the upper cylinder section, and the annular slope bottom is fixedly arranged at the bottom of the lower cylinder section.
Compared with the prior art, the invention has the following beneficial effects: the invention provides an aqueous medium separation cyclone with on-line adjustment of separation density, which is characterized in that a reverse annular slope bottom is arranged below a main cylinder of the cyclone, an underflow box is arranged at the bottom, a tangential water injection pipe is arranged on the side wall of the underflow box, a gap adjusting device is arranged in the underflow box, the separation density of the cyclone is adjusted on line by adjusting the water injection flow and the gap between the gap adjusting device and the reverse annular slope bottom, and the arrangement of the tangential underflow pipe avoids the communication between an overflow pipe and an underflow pipe orifice, so that an air column at the center of a conventional cyclone is not existed, the disturbance of an interface unstable air column to a separation flow field is effectively avoided, the problem of the loss of a light specific gravity product of the existing aqueous medium coarse slime separation equipment in the underflow is effectively solved, the flow field of the cyclone is stable, the separation precision is improved, and the on-line adjustment of.
Drawings
FIG. 1 is a schematic structural diagram of an aqueous medium sorting cyclone with on-line adjustment of sorting density according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a partially enlarged schematic view of fig. 1.
In the figure: 1 is an upper cylinder section, 2 is a middle cylinder section, 3 is a lower cylinder section, 4 is an underflow box, 5 is an overflow pipe, 6 is a tangential feeding pipe, 7 is an annular slope bottom, 8 is a tangential water injection pipe, 9 is a conical cylinder device, 10 is an adjusting screw rod, 11 is an adjusting hand wheel, 12 is a tangential underflow pipe, 13 is a guide pipe, 14 is a shell, 15 is an upper cover plate, and 16 is a gap adjusting device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, an embodiment of the present invention provides an aqueous medium separation cyclone with online adjustment of separation density, which includes a cylindrical casing 14, where the casing 14 includes an upper cylinder section 1, a middle cylinder section 2 and a lower cylinder section 3, the upper cylinder section 1, the middle cylinder section 2 and the lower cylinder section 3 are sequentially and hermetically connected from top to bottom, an upper cover plate 15 is disposed on the top of the upper cylinder section 1, a tangential feeding pipe 6 is disposed on a side wall, an overflow pipe 5 located at a central axis of the casing 14 is fixedly disposed on the upper cover plate 15, and the overflow pipe 5 extends to a height of the middle cylinder section 2 within the casing. The bottom of the lower cylinder section 3 is provided with an annular slope bottom 7 with high center and low edge, and the slope inclination angle of the annular slope bottom 7 is 5 degrees. A cylindrical underflow box 4 is arranged below the outer shell 14, the underflow box 4 is communicated with the inside of the outer shell 14 through a central hole of an annular slope bottom 7, a tangential water injection pipe 8 and a tangential underflow pipe 12 are arranged on the side wall of the underflow box 4, a conical cylinder device 9 positioned at the central axis of the outer shell 14 is arranged in the underflow box 4, the conical cylinder device 9 comprises an upper conical part and a lower cylindrical part, the upper conical part and the lower cylindrical part are connected with the underflow box 4 through a gap adjusting device 16, and the gap adjusting device 16 is used for adjusting the axial distance between the conical cylinder device 9 and the central hole on the annular slope bottom 7. Wherein, the water injection mouth of the tangential water injection pipe 8 is positioned at the height of the conical part of the conical cylinder device 9, the position of the tangential underflow pipe 12 is lower than that of the tangential water injection pipe 8, and in addition, the sidewall of the underflow box 4 is also provided with the tangential underflow pipe 12.
Specifically, as shown in fig. 3, the gap adjusting device 16 includes a guide pipe 13, an adjusting screw 10 and an adjusting hand wheel 11, the guide pipe 13 is fixedly disposed at the bottom of the underflow box 4, a cylindrical portion of the conical cylindrical device 9 is sleeved on the guide pipe 13, one end of the adjusting screw 10 is fixedly connected with the conical cylindrical device 9, and the other end of the adjusting screw passes through a threaded hole at the bottom of the underflow box 4 and is fixedly connected with the adjusting hand wheel 11. In addition, a flow regulating valve for regulating the injection flow is arranged on the tangential water injection pipe 8.
The working principle of the invention is as follows: the ore pulp is pressurized by a pump and then enters an annular space formed by an upper cylindrical section 1 and an overflow pipe 5 through a tangential feeding pipe 6, the fed materials are pre-sorted in the annular space, an ascending spiral flow of a light product entering the center of a cyclone after being pre-selected is discharged through a light product overflow pipe 5 arranged in the center of the upper cylindrical section 1, the light product enters a central ascending spiral flow through the process of continuously sorting the pre-selected materials in a middle cylindrical section 2 of the cyclone, a heavy product enters a descending spiral flow along the side wall, a heavy product enrichment layer is formed at a reverse annular slope bottom 7 on a lower cylindrical section 3 of the cyclone, the light product mixed in the heavy product layer can enter the ascending spiral flow in the center of the cyclone for the second time due to the reverse conical surface structure of the reverse annular slope bottom 7, the heavy product enters a cylindrical underflow box 4 through a central hole arranged at the reverse annular slope bottom 7, and the rotation of a heavy product particle bed layer is accelerated by a secondary water flow, the light particle products mixed in the heavy product bed layer are washed, so that the light and fine particle products are promoted to enter the ascending rotational flow at the center of the cyclone again along the reverse conical surface of the conical cylindrical device 9 and are discharged by the light product overflow pipe 5, and the heavy product particles are discharged by the tangential underflow pipe 12 arranged on the underflow box 4, thereby completing the sorting process. The separation density of the cyclone can be adjusted on line by adjusting the flow of the tangential water injection pipe 8 of the cut cylinder section 3 and adjusting the gap between the cylindrical conical device 9 and the central orifice of the reverse annular slope bottom 7. In addition, the reverse frustum structure of the cylindrical conical device 9 and the tangential arrangement of the heavy product underflow pipe avoid the communication between the overflow pipe and the underflow pipe orifice, so that the air column at the center of the conventional cyclone does not exist, and the disturbance of the existence of the unstable air column at the interface on the separation flow field is effectively avoided.
In addition, according to the water medium separation cyclone with online separation density adjustment, provided by the embodiment of the invention, a plurality of cyclones can be connected in parallel and work in a cyclone group mode, and the specific setting number and mode can be set according to purposes and purposes. The implementation and application of the invention are not limited to the coarse slime separation occasion, and the embodiment and the device adopting the invention are all included in the scope of rights and interests of the invention for other occasions of carrying out particle separation in solid-liquid two-phase fluid.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The aqueous medium separation cyclone with the online adjustment of separation density is characterized by comprising a cylindrical shell (14), wherein an upper cover plate (15) is arranged at the top of the shell (14), a tangential feeding pipe (6) is arranged on the side wall of the shell, and an annular slope bottom (7) with a high center and a low edge is arranged at the bottom of the shell; an overflow pipe (5) positioned at the central axis of the shell (14) is fixedly arranged on the upper cover plate (15); a cylindrical underflow box (4) is fixedly arranged below the outer shell (14), the underflow box (4) is communicated with the inside of the outer shell (14) through a central hole of an annular slope bottom (7), a tangential water injection pipe (8) and a tangential underflow pipe (12) are arranged on the side wall of the underflow box (4), and a conical cylinder device (9) located at the central axis position of the outer shell (14) is arranged in the underflow box (4); the conical cylinder device (9) comprises a conical part positioned above and a cylindrical part positioned below, and is connected with the underflow box (4) through a gap adjusting device (16); the gap adjusting device (16) is used for adjusting the axial distance between the conical cylinder device (9) and the central hole of the annular slope bottom (7).
2. The aqueous medium separation cyclone with the online adjusted separation density according to claim 1, wherein the gap adjusting device (16) comprises a guide pipe (13), an adjusting screw rod (10) and an adjusting hand wheel (11), the guide pipe (13) is fixedly arranged at the bottom of the underflow box (4), a cylindrical part of the conical cylindrical device (9) is sleeved on the guide pipe (13), one end of the adjusting screw rod (10) is fixedly connected with the conical cylindrical device (9), and the other end of the adjusting screw rod passes through a threaded hole at the bottom of the underflow box (4) and is fixedly connected with the adjusting hand wheel (11).
3. An aqueous medium separation cyclone with on-line adjustment of separation density according to claim 1, characterized in that the tangential water injection pipe (8) is provided with a flow adjusting valve for adjusting the injection flow.
4. An aqueous medium classifying cyclone with on-line adjustment of the classifying density according to claim 1, characterized in that the slope angle of the annular slope bottom (7) is 5 °.
5. An aqueous medium separation cyclone with online adjustment of separation density according to claim 1, characterized in that the casing (14) comprises an upper cylinder section (1), a middle cylinder section (2) and a lower cylinder section (3), the upper cylinder section (1), the middle cylinder section (2) and the lower cylinder section (3) are sequentially and closely connected from top to bottom, the tangential feeding pipe (6) is arranged on the side wall of the upper cylinder section (1), and the annular slope bottom (7) is fixedly arranged at the bottom of the lower cylinder section (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910220362.4A CN110013910B (en) | 2019-03-22 | 2019-03-22 | Aqueous medium sorting cyclone with online adjusted sorting density |
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| CN201910220362.4A CN110013910B (en) | 2019-03-22 | 2019-03-22 | Aqueous medium sorting cyclone with online adjusted sorting density |
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| CN111589595B (en) * | 2020-05-18 | 2022-03-22 | 天地（唐山）矿业科技有限公司 | Swirler backpressure online adjusting device |
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| NL75043C (en) * | 1951-11-30 | |||
| JP2638748B2 (en) * | 1994-06-07 | 1997-08-06 | 三恵株式会社 | Cyclone and its emission control device |
| US6739456B2 (en) * | 2002-06-03 | 2004-05-25 | University Of Florida Research Foundation, Inc. | Apparatus and methods for separating particles |
| RU2341335C2 (en) * | 2007-02-02 | 2008-12-20 | Федеральное государственное унитарное предприятие "Научно-исследовательский физико-химический институт имени Л.Я. Карпова" | Vortex apparatus |
| CN101590451B (en) * | 2009-02-27 | 2010-09-08 | 太原理工大学 | Coal slime rotational flow reselecting column |
| CN102416365A (en) * | 2011-09-19 | 2012-04-18 | 黄山 | Novel heavy medium cyclone |
| CN202845198U (en) * | 2012-09-12 | 2013-04-03 | 兖煤菏泽能化有限公司 | On-line adjustable bottom flowing opening and hydrocyclone |
| CN204911753U (en) * | 2015-07-16 | 2015-12-30 | 中国矿业大学 | Whirl is scanned and is disturbed bed sorting unit |
| CN106861940B (en) * | 2017-02-17 | 2019-04-16 | 太原理工大学 | Multi-product water-only cyclone is selected in a kind of underflow again |
| CN207592085U (en) * | 2017-08-10 | 2018-07-10 | 山东科技大学 | A kind of three product grading plant of rotational flow settlement |
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Effective date of registration: 20220121 Address after: 030000 area B, room 630, phase II comprehensive office building, Jinxiu street, Yangqu Park, Taiyuan, Shanxi Province Patentee after: Shanxi chengchuang Manufacturing Technology Development Co.,Ltd. Address before: 030024 No. 79 West Main Street, Taiyuan, Shanxi, Yingze Patentee before: Taiyuan University of Technology |
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