CN104549708A - Spiral up-flow type liquid-solid fluidized bed separation equipment and method - Google Patents
Spiral up-flow type liquid-solid fluidized bed separation equipment and method Download PDFInfo
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- CN104549708A CN104549708A CN201410844230.6A CN201410844230A CN104549708A CN 104549708 A CN104549708 A CN 104549708A CN 201410844230 A CN201410844230 A CN 201410844230A CN 104549708 A CN104549708 A CN 104549708A
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Abstract
Disclosed is spiral up-flow type liquid-solid fluidized bed separation equipment and method. The equipment is mainly composed of a separation chamber, a power portion and a transmission device. A cylinder made of organic glass is arranged outside the separation chamber, and a rotatable helical blade is mounted inside the separation chamber. The power portion is composed of a variable-frequency speed-governing three phase asynchronous motor and a variable-frequency speed governor. The transmission device is composed of a transmission shaft, a coupler, a bearing and a packing seal device. During separation, water flow is fed in from a water ingoing pipe, the motor drives the helix blade on the transmission shaft through the coupler to rotate together, the water flow is driven to flow upwards inside the cylinder along the helix, ore pulp is fed in from a feeding pipe, a fluidized bed is formed under the action of helical upward flow, cleaned coal is discharged from an overflow weir, tailings are discharged from an underflow pipe, and the equipment is simple in structure, convenient to operate, free of chemical agent consumption, high in separation accuracy and particularly applicable to separation of coarse slime with the diameter of 2-0.3mm.
Description
Technical field
The present invention relates to liquid-solid fluid bed separation apparatus and method for, especially a kind of particle diameter that is applicable to is the spiral lift flow type liquid-solid fluid bed separation apparatus and method for that the coarse slime of 2-0.3mm carries out sorting.
Background technology
Along with the raising of mining mechanization degree, in raw coal, fine particle content is on the increase, and comes difficult to slime water treatment system band.At present, the heavy-media coal preparation process of China takes preparation of unsized raw coal and No severing mud to be selected in mostly, and equipment trend maximizes.Although this way simplifies technique, be unfavorable for the efficiency of separation improving wholegrain level coal, and existing equipment sharpness of separation does not reach technological requirement yet.The sorting particle size range of heavy medium cyclone is 50 ~ 0.15mm, but production practices show, when dense medium cyclone diameter is more than 750mm, sharpness of separation for <3mm grade (3 ~ 0.15mm) material is poor, the sorting particle size range of flotation device is <0.5mm, but only can realize effective sorting to <0.3mm material aborning, and the coarse slime of >0.3mm is very easily lost in mine tailing because of the carrying capability deficiency of bubble in floatation process.Therefore, between gravity treatment and flotation, there is the breach of an effective sorting granularity, namely gravity treatment is along with the reduction of granularity, and the efficiency of separation declines, and flotation is then along with the increase of granularity, and the efficiency of separation progressively reduces.Thus granularity be in gravity treatment and flotation effective sorting scope have a common boundary near the coal grain efficiency of separation minimum.Therefore, the effective sorting realizing coarse slime is one of current coal separation industry problem demanding prompt solution.
To the sorting of coarse slime in 2-0.25mm particle size range, it is the weak link of existing coal preparation technique.Lack the development equipment of this particle size range height sharpness of separation seriously being constrained to coal preparation technique, become the bottleneck problem that coal preparation plant ensures product quality, increases economic efficiency gradually.Only have the effective sorting problem solving coarse slime processing links, the pollution to cleaned coal could be reduced, ensure the maximization of wholegrain level quality of cleaned coal and productive rate.
At present, the screening installation of >0.3mm grade coal slime mainly contains: spiral, fine coal properties matter cyclone, hindered bed separator etc.Spiral, grading principle is the difference stressed on spiral groove face of different densities particle and produces the difference of its motion component velocity, is finally presented as that the distribution along spiral groove face radial direction is different, thus makes the particle of different densities complete sorting.Have good separating effect for easy coal separation, but fuselage height is large, during coal varitation, technological parameter not easily regulates, and when separating density is lower, separating effect is poor.It is higher to fluctuate bad adaptability, separating density of pan feeding, restricts the key that it applies in separation of coarse slime; The density of the heavy suspension of Slime dense medium cyclone is close to separating density, and thus sharpness of separation is high.Its shortcoming is the impact that separating effect is subject to the factor such as granularity and Algorithm of Density Control of coal slime medium solid; Hindered bed separator disposal ability is large, with regard to its grading principle, ascending current flow velocity is the important operation parameter affecting its quality of cleaned coal and productive rate, and ascending water speed is directly affected on the control of underflow, the underflow of hindered bed separator controls to be by automatically adjusting to the mensuration of flow velocity, but existing automatic detection and control system imperfection, can not real-time tracking completely to the control of underflow, the instability of whole assorting room will be caused like this, affect quality and the productive rate of cleaned coal.
Summary of the invention
Technical problem: the object of the invention is to overcome weak point of the prior art, provide that a kind of structure is simple, simple operation, production cost is low, treating capacity is large, product structure is easy to adjustment spiral lift flow type liquid-solid fluid bed separation Apparatus and method for.
Technical scheme: of the present invention kind of spiral lift flow type liquid-solid fluid bed separation equipment, comprise frame, be located at the sorting post of upper rack and be located at the motor of frame lower, the power transmission shaft through sorting cylinder is provided with in described sorting post, power transmission shaft bottom is connected with motor output shaft through bearing, shaft coupling successively, and power transmission shaft upper end is fixed on frame top through bearing; Power transmission shaft in described sorting post is fixed with helical blade, the bottom of sorting post is provided with underflow pipe, underflow pipe top is provided with oral siphon, and the downflow weir sidewall of sorting post is provided with the feeding pipe fed intake to sorting post, and the bottom of sorting post is provided with the seal receptacle preventing ore pulp from flowing out.
The cylinder of described sorting post is that lucite is made.
Described motor is made up of frequency converting speed regulating three-phase asynchronous electromotor and variable-frequency governor.
Use the spiral lift flow type liquid-solid fluid bed separation method of the said equipment, comprise the steps:
A. squeeze into sorting post in by current from oral siphon by force (forcing) pump, motor drives the helical blade on power transmission shaft to rotate together by shaft coupling, drives current upwards to flow at sorting post inside spin, is formed stable liquid-solid fluid bed in sorting post;
B. selected coal slime is sent in liquid-solid fluid bed sorting post by feeding pipe, under the stirring of helical blade, to contact with the helical blade moved upward with current upwards and hindered falling occurs, coarse slime particle and current move toward one another, low-density particle rises to downflow weir by the acting in conjunction of ascending current and helical blade and discharges, highdensity granule materials continues downward sedimentation, is discharged by underflow pipe;
C. low-density particle moves upward under flow action and is got rid of by downflow weir with overflow on screw, and highdensity tail coal is discharged by the underflow pipe of sorting column bottom, realizes the separation of coarse slime by density.
The particle diameter of described selected coal slime is the coarse slime of 2-0.3mm.
Beneficial effect: the present invention is on the basis of hindered bed separator, add one group of helical blade upwards rotated, the power of reinforcing particle rising, reduces the solid solvent concentration of separator bottom particles, is more conducive to the displacement of different densities particle to a certain extent.Promote with under ascending current acting in conjunction at helical blade eddy flow, stable fluid bed is defined in sorting body, significantly reduce the solid solvent concentration gradient change on height of column direction, improve the loose condition (of surface) of fluidization bed, facilitate the fluency of particle displacement motion, thus significantly improve separating effect, make separator still can obtain good separating effect when material size wider range, can ensure that fluid bed is stablized, make separator still can obtain good separating effect when material size wider range, by the situation regulating the rotating speed of motor can adjust separator easily according to the ature of coal situation of feed coal and the quality requirement of product, the accommodation of material size is large, sharpness of separation is high, can effectively to wide rank, difficulty selects coarse slime to carry out sorting, meet the needs of actual production, simultaneously, structure of the present invention is simple, simple operation, do not need outer adding medicine, flow process is simple, take up an area less, economy and durability, solve preferably the efficiency of separation and medicine consume between contradiction.Effectively reduce cleans ash, decrease dense medium back of the body meeting phenomenon, add the clean coal yield of coal preparation plant, improve economic benefit.
Accompanying drawing explanation
Fig. 1 is the liquid-solid fluid bed structural representation of spiral lift flow type of the present invention;
In figure: 1-power transmission shaft; 2-bearing; 3-feeding pipe; 4-helical blade; 5-packing seal; 6-bearing; 7-shaft coupling;
8-motor; 9-frame; 10-downflow weir; 11-oral siphon; 12-underflow pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Shown in Fig. 1, spiral lift flow type liquid-solid fluid bed separation equipment of the present invention, is formed primarily of power transmission shaft 1, bearing 2, feeding pipe 3, helical blade 4, packing seal 5, bearing 6, shaft coupling 7, motor 8, frame 9, sorting post.The cylinder of described sorting post is that lucite is made, and described motor is made up of frequency converting speed regulating three-phase asynchronous electromotor and variable-frequency governor.Sorting post is located at the top of frame 9, motor 8 is located at the bottom of frame 9, be provided with the power transmission shaft 1 through sorting cylinder in described sorting post, power transmission shaft 1 bottom is connected with motor 8 output shaft through bearing 6, shaft coupling 7 successively, and power transmission shaft 1 upper end is fixed on frame 9 top through bearing 2; Power transmission shaft 1 in described sorting post is fixed with helical blade 4, the bottom of sorting post is provided with underflow pipe 12, underflow pipe 12 top is provided with oral siphon 11, and downflow weir 10 sidewall of sorting post is provided with the feeding pipe 3 fed intake to sorting post, and the bottom of sorting post is provided with the seal receptacle 5 preventing ore pulp from flowing out.The bottom of sorting cylinder is provided with oral siphon 11, and current are fed by it, and frequency converting speed regulating three-phase asynchronous electromotor 8 drives the helical blade 4 on power transmission shaft 1 to rotate together by shaft coupling 7, drives current to flow along on screw in sorting column body.
Spiral lift flow type liquid-solid fluid bed separation method of the present invention, concrete steps are as follows:
A. by force (forcing) pump, current are squeezed in sorting post from oral siphon 11, enter separation chamber, frequency converting speed regulating three-phase asynchronous electromotor 8 drives the helical blade 4 on power transmission shaft 1 to rotate together by shaft coupling 7, drive current upwards to flow at sorting post inside spin, in sorting post, form stable liquid-solid fluid bed sorting environment;
B. selected coal slime is sent in liquid-solid fluid bed sorting post by feeding pipe 3, the particle diameter of selected coal slime is the coarse slime of 2-0.3mm, under the stirring of helical blade 4, contact with current upwards with the helical blade 4 moved upward and hindered falling occurs, form stable fluidization bed, ore pulp and current move toward one another, coarse slime particle and current move toward one another, low-density particle rises to downflow weir 10 by the acting in conjunction of ascending current and helical blade and discharges, highdensity granule materials continues downward sedimentation, is discharged by underflow pipe 12;
C. low-density particle moves upward under flow action and is got rid of by downflow weir 10 with overflow on screw, and highdensity tail coal is discharged by the underflow pipe 12 of sorting column bottom, forms the assorting room of ore pulp, finally realizes the separation of coarse slime by density.
Claims (5)
1. a spiral lift flow type liquid-solid fluid bed separation equipment, it is characterized in that: it comprises frame (9), is located at the sorting post on frame (9) top and the motor (8) being located at frame (9) bottom, the power transmission shaft (1) through sorting cylinder is provided with in described sorting post, power transmission shaft (1) bottom is connected with motor (8) output shaft through bearing (6), shaft coupling (7) successively, and power transmission shaft (1) upper end is fixed on frame (9) top through bearing (2); Power transmission shaft (1) in described sorting post is fixed with helical blade (4), the bottom of sorting post is provided with underflow pipe (12), underflow pipe (12) top is provided with oral siphon (11), downflow weir (10) sidewall of sorting post is provided with the feeding pipe (3) fed intake to sorting post, and the bottom of sorting post is provided with the seal receptacle (5) preventing ore pulp from flowing out.
2. spiral lift flow type liquid-solid fluid bed separation equipment according to claim 1, is characterized in that: the cylinder of described sorting post is that lucite is made.
3. spiral lift flow type liquid-solid fluid bed separation equipment according to claim 1, it is characterized in that, described motor is made up of frequency converting speed regulating three-phase asynchronous electromotor and variable-frequency governor.
4. use a spiral lift flow type liquid-solid fluid bed separation method for equipment described in claim 1, it is characterized in that, comprise the steps:
A. by force (forcing) pump, current are squeezed in sorting post from oral siphon (11), motor (8) drives the helical blade (4) on power transmission shaft (1) to rotate together by shaft coupling (7), drive current upwards to flow at sorting post inside spin, formed stable liquid-solid fluid bed in sorting post;
B. will be selected in coal slime sends in liquid-solid fluid bed sorting post by feeding pipe (3), under the stirring of helical blade (4), contact with current upwards with the helical blade moved upward (4) and hindered falling occurs, coarse slime particle and current move toward one another, low-density particle rises to downflow weir (10) by the acting in conjunction of ascending current and helical blade and discharges, highdensity granule materials continues downward sedimentation, is discharged by underflow pipe (12);
C. low-density particle moves upward under flow action and is got rid of by downflow weir (10) with overflow on screw, and highdensity tail coal is discharged by the underflow pipe (12) of sorting column bottom, realizes the separation of coarse slime by density.
5. spiral lift flow type liquid-solid fluid bed separation method according to claim 4, is characterized in that: the particle diameter of described selected coal slime is the coarse slime of 2-0.3mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941743A (en) * | 2015-07-01 | 2015-09-30 | 中国矿业大学 | Coal grinding device and method |
| CN106680160A (en) * | 2017-02-28 | 2017-05-17 | 广西大学 | Continuous hydraulic analyzer adopting flow rising method and analysis method thereof |
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| CN101402063A (en) * | 2008-11-04 | 2009-04-08 | 中国矿业大学(北京) | Coarse slime interference bed separation equipment based on gravity force and interfacial force, method and uses thereof |
| CN202410817U (en) * | 2011-12-20 | 2012-09-05 | 华北科技学院 | Three-product liquid-solid fluidized bed separator |
| CN204523209U (en) * | 2014-12-30 | 2015-08-05 | 中国矿业大学 | A kind of spiral lift flow type liquid-solid fluid bed separation equipment |
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2014
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Patent Citations (6)
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| WO1995008394A1 (en) * | 1993-09-23 | 1995-03-30 | Industrial Separations Engineering Ltd | A method and apparatus for separating articles of different densities |
| CN201052472Y (en) * | 2007-05-17 | 2008-04-30 | 中国矿业大学 | Liquid-solid fluid bed coarse slime size classification grading device |
| CN101391236A (en) * | 2008-10-25 | 2009-03-25 | 中国矿业大学 | Multi-product liquid-solid fluid bed separation classification device and method |
| CN101402063A (en) * | 2008-11-04 | 2009-04-08 | 中国矿业大学(北京) | Coarse slime interference bed separation equipment based on gravity force and interfacial force, method and uses thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104941743A (en) * | 2015-07-01 | 2015-09-30 | 中国矿业大学 | Coal grinding device and method |
| CN106680160A (en) * | 2017-02-28 | 2017-05-17 | 广西大学 | Continuous hydraulic analyzer adopting flow rising method and analysis method thereof |
| CN106680160B (en) * | 2017-02-28 | 2023-10-20 | 广西大学 | Continuous hydraulic analyzer adopting updraft method and analysis method thereof |
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Address after: 221116 Research Institute of China University of Mining and Technology,, Jiangsu Applicant after: China University of Mining & Technology Address before: 221116 Research Institute, China University of Mining and Technology, Xuzhou University, Jiangsu, China, Applicant before: China University of Mining & Technology |
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