CN115350916A - Fine coal fines vibration step sorter - Google Patents
Fine coal fines vibration step sorter Download PDFInfo
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- CN115350916A CN115350916A CN202211013472.1A CN202211013472A CN115350916A CN 115350916 A CN115350916 A CN 115350916A CN 202211013472 A CN202211013472 A CN 202211013472A CN 115350916 A CN115350916 A CN 115350916A
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- 239000003245 coal Substances 0.000 title claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 63
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000005284 excitation Effects 0.000 claims abstract description 28
- 239000010419 fine particle Substances 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 12
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 239000008187 granular material Substances 0.000 claims description 23
- 238000009826 distribution Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 14
- 238000005243 fluidization Methods 0.000 claims description 11
- 239000010878 waste rock Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 4
- 238000005204 segregation Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 36
- 238000000926 separation method Methods 0.000 abstract description 27
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 14
- 239000000428 dust Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000005065 mining Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- 238000013508 migration Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
Abstract
The invention discloses a fine-particle slack coal vibrating step separator, wherein after materials enter a separator main body, an eccentric excitation mechanism drives the separator main body to linearly reciprocate and vibrate, a blower forms fluidized air for the materials through an air outlet hole arranged on a separation bed surface of the separator main body, the materials are enabled to be fully loosened under the combined action of a fluidized force field formed by the fluidized air and a vibrating force field generated by the eccentric excitation mechanism, relative slippage is generated due to density difference among the particles, high-density gangue particles gradually slide down, low-density coal particles gradually climb to an upper layer under the synergistic action of inter-particle friction extrusion and airflow drag force, lower-layer particles slide to a gangue channel under the guiding action of bed surface friction and material blocking lattice strips, upper-layer particles are transversely separated from lower-layer particles due to bed surface inclination and rear material pushing action, and enter a next step separation section after passing through the lattice strips, separation operation is continuously realized, the structure is simple, and the separation efficiency is high.
Description
Technical Field
The invention relates to the technical field of coal sorting machines, in particular to a fine-grained slack coal vibration step sorting machine.
Background
Because different types of coal may appear in coal mining, the characteristics such as combustion values and the like are different, and meanwhile, the coal mining method has different economic values, some coal mining methods are suitable for power generation, some coal mining methods are suitable for steel making, and other coal mining methods are suitable for other purposes.
Therefore, it is necessary to classify mined coal. The dry-method sorting machines adopted in the current market comprise a ZM series dry-method sorting machine and a TFX series dry-method sorting machine, and the dry-method sorting equipment utilizes an excitation motor arranged on a machine body back plate to generate high-frequency vibration so as to realize the sorting operation of different coals.
However, at present, coal with large size is mainly sorted, and the sorting capability of coal with small size (such as 0-13 mm) is poor, so that the condition of back mixing of light and heavy particles occurs, and the sorting effect is reduced.
Disclosure of Invention
The invention aims to provide a fine-grained slack coal vibrating step separator, which can realize high-efficiency separation of small-size bright coal particles and does not generate the phenomenon of back mixing of light and heavy particles.
In order to solve the technical problems, the embodiment of the invention provides a fine-particle slack coal vibrating step separator which comprises a separator main body, an eccentric excitation mechanism and an air blower, wherein after materials enter the separator main body, the eccentric excitation mechanism drives the separator main body to linearly and reciprocally vibrate, the air blower forms fluidized wind for the materials through an air outlet hole arranged on a separation bed surface of the separator main body, under the combined action of a fluidized force field formed by the fluidized wind and a vibration force field generated by the eccentric excitation mechanism, after the materials are sufficiently loosened, relative slippage is generated due to density difference among the particles, high-density gangue particles gradually slide down, low-density coal particles gradually climb to an upper layer under the synergistic action of inter-particle friction extrusion and airflow force, lower-layer particles slide to a gangue channel bed surface under the synergistic action of bed surface friction and material blocking strip guiding, upper-layer particles are transversely separated from lower-layer particles and enter a next step section through the material blocking strip to continuously separate, and separation operation is realized.
The sorting bed comprises a sorting bed body and is characterized by further comprising a bed surface inclination angle adjusting mechanism arranged on the sorting bed body and used for controlling the bed surface inclination angle of the sorting bed surface of the sorting bed body.
The device also comprises an inclination angle sensor arranged on the sorting bed surface and used for measuring the transverse inclination angle and the longitudinal inclination angle of the sorting bed surface.
The material output buffer device comprises a sorting machine body and a buffer bin, wherein the buffer bin is arranged at the inlet end of the sorting machine body and is used for outputting the buffered materials to the inlet end of the sorting machine body.
The vibration-damping sorting bed further comprises a balancing weight arranged on the eccentric vibration excitation mechanism and used for offsetting impact generated by vibration of the sorting bed main body and the sorting bed surface material of the sorting bed main body.
The eccentric excitation mechanism is a medium-low frequency eccentric excitation mechanism.
The sorting machine comprises a sorting machine body, a sorting machine body and a feeding device, wherein the sorting machine body is provided with a sorting bed surface which is a porous trapezoidal sorting bed surface, and the upper bottom of the porous trapezoidal sorting bed surface is a feeding end.
The sorting bed surface of the sorting machine main body is a porous corrugated metal plate sorting bed surface, and the diameter of the air outlet is 1-1.5 mm.
The sorting machine is characterized by further comprising a trapezoidal air distribution plate arranged at the bottom of the sorting bed surface, wherein the aperture ratio of the trapezoidal air distribution plate is continuously adjusted through the bending angle of a metal plate or adjusted through different air supply channel valves.
The tail gas treatment device comprises a separator body, a tail gas treatment device and a draught fan, wherein the separator body is provided with a tail gas treatment device, and the tail gas treatment device is connected with a dust remover of the tail gas treatment device.
Compared with the prior art, the fine-grained slack coal vibration step separator provided by the embodiment of the invention has the following advantages:
the fine-particle slack coal vibrating cascade separator is simple in structure, high in separation efficiency and free of the phenomenon of light and heavy particle back mixing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a fine-grained slack coal vibratory cascade classifier provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of an embodiment of an air distribution plate of the fine-grained slack coal vibrating step classifier provided by the embodiment of the invention;
FIG. 3 is a schematic structural diagram of one embodiment of a functional partition of a sorting bed of the fine coal vibratory cascade classifier provided by an embodiment of the invention;
FIG. 4 is a schematic illustration of the air distribution effect of an embodiment of the sorting bed of the fine-grained slack coal vibrating cascade sorter provided by an embodiment of the invention;
fig. 5 is a schematic structural diagram of an embodiment of a sorting bed of the fine-grained slack coal vibrating step sorter provided by the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1-5, fig. 1 is a schematic structural diagram of an embodiment of a fine-grained slack coal vibratory cascade classifier according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of an embodiment of an air distribution plate of the fine-grained slack coal vibrating step classifier provided by the embodiment of the invention; FIG. 3 is a schematic structural diagram of one embodiment of a functional partition of a sorting bed of the fine coal vibratory cascade classifier provided by an embodiment of the invention; FIG. 4 is a schematic illustration of the air distribution effect of an embodiment of the sorting bed of the fine-grained slack coal vibrating cascade sorter provided by an embodiment of the invention; fig. 5 is a schematic structural diagram of an embodiment of a sorting bed of the fine-grained slack coal vibrating step sorter provided by the embodiment of the invention.
In a specific embodiment, granule slack coal vibration step sorter, including sorter main part 10, eccentric excitation mechanism 50 and air-blower 20, wherein, the material gets into sorter main part 10 back, eccentric excitation mechanism 50 drives sorter main part 10 carries out sharp reciprocating vibration, air-blower 20 is through setting up the venthole of the sorting bed surface of sorter main part 10 is right the material forms the fluidization wind form the fluidization force field with the combined action in the vibration force field that eccentric excitation mechanism 50 produced, make the abundant loose back of material produces relative slippage because of the density difference between the granule, and the waste rock granule of high density slips downwards gradually, and the coal granule of low density climbs to the upper strata gradually under the inter-particle friction extrusion and air current drag force synergism, and the lower floor's granule slides to the waste rock passageway under friction and the grid guide effect, and the upper strata granule is because bed surface slope and rear portion material pushing effect, takes place lateral segregation with the lower floor's granule, crosses the next step of keeping off the material grid and gets into next step sorting operation interval and continues to sort, realizes sorting operation.
The fine-particle slack coal vibrating step sorting machine is simple in structure, high in sorting efficiency and free of the phenomenon that light and heavy particles are mixed back, and sorting operation is achieved.
The vibration power field in this application mainly plays two aspects in the sorting process: on one hand, the activity of particles in a material layer is improved, the material layer is loosened, the resistance of airflow in the process of passing through particles in a bed layer is reduced, and the phenomenon that fluidizing wind is converged to a region with weak resistance to form local airflow short circuit bubbling is avoided; on the other hand, the friction force required by the movement of the lower-layer high-density particles to the discharge end of the gangue is provided, and the particles with different densities are driven to generate relative movement. The fluidized field has the main function of layering materials according to density in a separation process by cooperating with the vibration force field, and the materials on the upper layer enter a fluidized state, so that the migration resistance of the materials on the upper layer is reduced.
The sorter main part 10 in this application gets into the material from pan feeding mouth 12, and sorting bed frame 11 is used for supporting the sorting bed face.
Since the contents of impurities and the like in coals of different qualities are different, inclination angles of bed surfaces required are different, because in order to improve the separation efficiency, in one embodiment, the fine-particle pulverized coal vibrating cascade separator further includes a bed surface inclination angle adjusting mechanism provided in the separation bed main body for controlling the bed surface inclination angle of the separation bed surface of the separation bed main body.
The bed surface inclination angle of the sorting bed surface of the sorting bed main body is controlled through the bed surface inclination angle adjusting mechanism, sorting of coal with different components is achieved, and sorting efficiency is improved.
The present application may be adjusted simultaneously in the transverse direction and the longitudinal direction, or may be adjusted separately, and includes a transverse tilt angle adjusting device 61 for transverse adjustment and a longitudinal tilt angle adjusting device 62 for longitudinal tilt angle adjustment.
Further, to improve the accuracy of control, in one embodiment, the fine coal fines vibratory step sorter further includes an inclination angle sensor disposed on the sorting deck for measuring a lateral inclination angle and a longitudinal inclination angle of the sorting deck.
Through inclination angle sensor, real-time measurement and control divide the horizontal inclination and the vertical inclination of revolving bed, form the feedback to bed surface inclination adjustment mechanism's control result, improve control accuracy, on the other hand, can be under the condition of equipment trouble, discover the trouble fast, improve maintenance efficiency.
The structure and the adjustment process of the bed surface inclination angle adjusting mechanism are not limited in the application, adjustment is generally carried out through parts such as gears, then the hydraulic adjusting device is matched, the bed surface inclination angle of the sorting bed can be accurately controlled, the working condition parameters are adjusted on line, and favorable conditions are provided for realizing automatic (intelligent) control of the fine-particle slack coal vibration step sorting machine.
In order to solve the technical problem in the present application that the material may be damaged due to the high speed impact or the blocking of the inlet of the sorting bed if the material is directly introduced into the sorting bed due to the limited processing capacity of the sorting bed, in one embodiment, the fine particle coal vibrating cascade sorter further includes a buffering bin 30 disposed at the inlet end of the sorter body 10 for buffering the output of the material and outputting the buffered material to the inlet end of the sorter body 10.
Will through surge bin 30 the material output is exported after buffering the entry end of sorter main part 10 has avoided direct impact, has also avoided the jam that disposable excessive material caused to the sorting bed simultaneously, has improved the high efficiency and the reliability of handling.
The volume and shape of the surge bin 30 are not limited in this application.
Since the vibration of the eccentric excitation mechanism 50 in the present application can cause impact on the sorting bed main body and related parts, the service life is reduced.
In order to solve the technical problem, in an embodiment, the fine-grained slack coal vibrating step classifier further includes a weight block disposed on the eccentric excitation mechanism 50 for offsetting the impact generated by the classifying bed main body and the classifying bed surface material vibration of the classifying bed main body.
The working frequency of the eccentric excitation mechanism 50 is not limited in the present application, and generally, the eccentric excitation mechanism 50 is a medium-low frequency eccentric excitation mechanism 50, for example. The eccentric excitation device generates middle-low frequency (less than 8 Hz) linear reciprocating vibration, can generate effective separation effect on particles with different densities, prevents light and heavy particles from back mixing, can produce high-quality low-ash clean coal, is provided with a balancing weight with specific weight, offsets impact generated by vibration of materials of a separation bed and a bed surface, ensures stable operation of equipment, reduces abrasion of parts and prolongs the service life of the equipment.
This application does not do the injecing to the shape and the structure of sorter main part 10, owing to select separately to the coal of different densities in this application, therefore under the same quality, under the condition that the interval is equal basically, the shared volume of the granule of different densities is different, consequently generally the sorting bed surface of sorter main part 10 is porous trapezoidal sorting bed surface, the upper base department of porous trapezoidal sorting bed surface is the pan feeding end.
In this application, need select separately through the combined action of vibration power field and fluidization power field, do not do the restriction to its material, structure and size of venthole, generally the separation bed surface of sorter main part 10 is porous corrugated sheet metal separation bed surface, the venthole diameter is 1mm ~ 1.5mm.
Furthermore, in order to realize the separation of different coals, control different ventilations and realize different separation effects, in one embodiment, the fine coal powder vibration step separator further comprises a trapezoidal air distribution plate arranged at the bottom of the separation bed surface, and the aperture ratio of the trapezoidal air distribution plate is continuously adjusted through the bending angle of the metal plate or adjusted through different air supply channel valves.
The bending angle of the metal plate of the trapezoidal air distribution plate is continuously adjusted, the opening rate of the trapezoidal air distribution plate cloth is controlled to realize different fluidization force fields under the condition of unchanged air supply amount, and different control separation effects are realized.
The air blower 20 in the application generally outputs air to the air outlet hole through the pre-air distribution chamber 21, so that the phenomenon that partial areas cannot be ventilated is avoided, and the ventilation efficiency is improved.
Because the fine particle slack coal vibration step sorter can cause air pollution by directly outputting dust and the like in coal after sorting is completed, the dust can enter gaps among equipment parts, so that the operation of the parts is hindered, and meanwhile, if workers are on the spot, the parts can be damaged by the generated equipment faults, even accidents can occur, and the personnel can be damaged.
In order to solve the technical problem, in one embodiment, the fine coal powder vibratory cascade separator further includes an exhaust gas treatment device 40 connected to the separator body 10, and the exhaust gas generated by the separator body 10 is discharged through an induced draft fan 42 after being subjected to a dust removal operation by a dust remover 41 of the exhaust gas treatment device 40.
The dust is discharged through the induced draft fan 42 after the dust removal operation is performed through the dust remover 41, the dust is treated, the air pollution and the negative effects on the health of workers and equipment are avoided, and the running reliability of the equipment is improved.
In one embodiment of the application, according to the material layer distribution characteristics and the different requirements of each region to the fluidization wind speed in the separation process, the aperture ratio of the air distribution plate is reasonably designed, the separation needs are better met, the bed surface is divided into 4 regions which are respectively a feeding region, a separation region, a gangue channel and a discharging region, and the bed surface is shown in fig. 3. The pan feeding district area is minimum, and the bed of material is thickest, needs high gas velocity air current to strike quick loose, layering, avoids the granule to pile up and influences the feed homogeneity, and the vast majority of granule in the waste rock passageway are high density waste rock particle, equally needs high fluidization wind speed to guarantee that the waste rock particle is discharged fast, prevents to pollute clean coal product, and the separation district top-down widens gradually, and the bed of material is the attenuation gradually, and required fluidization wind speed reduces gradually, therefore the grid plate aperture ratio also reduces gradually.
For couch top design:
1) The bed surface of the porous trapezoidal sorting bed is made of porous corrugated metal plates, and the corrugated design can improve the friction coefficient of the bed surface, accelerate the movement speed of waste rock particles to a heavy product side and facilitate the quick discharge of the waste rock particles;
2) The bed surface is provided with the material blocking lattice strips, the whole bed surface is divided into a plurality of step sorting sections to form step sorting, the sorting time of light and heavy materials is increased, the material blocking lattice strips are not arranged in the gangue passage area, gangue particles are quickly discharged, clean coal products are prevented from being polluted, and the sorting precision is improved;
3) The diameter of the fluidized air outlet hole is 1mm, the hole diameter is small, the number is large, and the fine air distribution forms a stable fluidized field, so that the separation precision is improved.
Designing a sorting process: the materials are evenly fed to a material inlet of a sorting host machine through a star-shaped feeder from a buffer bin, the materials enter a porous trapezoid sorting bed, under the combined action of fluidized wind impact and vibration of a material feeding area Gao Qisu, the materials are quickly loosened and enter a sorting area, ascending air flow enables material groups to keep loose and be layered according to density, high-density particles are located at the bottom of a bed layer and move to the side of a heavy product under the combined action of material blocking grid strips and a corrugated bed surface, a blank area with a certain width is reserved on the side of the heavy product, the material blocking grid strips are not arranged in the area, the heavy product is quickly discharged, low-density particles are located at the top of the bed layer, under the pushing action of self gravity and rear materials, the low-density particles pass through the material blocking grid strips and enter the next step sorting area to be continuously sorted, the steps are circularly repeated in the above way, sorting is finished, and particle dust generated in the sorting process is filtered and collected in a dust collector 41.
To sum up, the fine-grained slack coal vibrating step sorter that this application embodiment provided, the material gets into behind the sorter main part, eccentric excitation mechanism drives the sorter main part and carries out straight reciprocating vibration, the air-blower forms the fluidizing air through setting up the venthole on the sorting bed surface of sorter main part to the material, under the combined action of the fluidization force field that fluidizing air formed and the vibration force field that eccentric excitation mechanism produced, make the material fully loose the back, produce relative slip because of the density difference between the granule, the waste rock granule of high density slips downwards gradually, the coal granule of low density climbs to the upper strata under the synergistic action of inter-particle friction extrusion and air current drag force, lower floor's granule slides to the waste rock passageway under bed surface friction and the effect of keeping off the material check strip direction, upper strata granule because slope and rear material push effect, take place horizontal separation with lower floor's granule, cross the effect of keeping off the material check strip and get into next step and select separately continuously, realize the sorting operation, simple structure, sorting efficiency is high, can not produce the phenomenon that light and heavy granule returns the shape.
The fine-grained pulverized coal vibrating step sorter provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a fine grain slack coal vibration step sorter, its characterized in that, includes sorter main part, eccentric excitation mechanism and air-blower, wherein, the material gets into behind the sorter main part, eccentric excitation mechanism drives the sorter main part carries out straight reciprocating vibration, the air-blower is in through setting up the exit port on the sorting bed surface of sorter main part is to the material forms the fluidization wind fluidization force field that fluidization wind formed with under the combined action in the vibration force field that eccentric excitation mechanism produced, make the abundant loose back of material produces relative slip because of the density difference between the granule, and the waste rock granule of high density is landing downwards gradually, and the coal granule of low density climbs to the upper strata under intergranular friction extrusion and air current synergism, and lower floor's granule slides to the waste rock passageway under bed surface friction and material blocking lattice bar guiding action, and upper strata granule takes place lateral segregation because bed surface slope and rear portion material pushing effect, with lower floor's granule, crosses sorting lattice bar and gets into next sorting step interval, realizes the operation drag.
2. The fine coal fines vibratory step sorter of claim 1 further including a deck tilt adjustment mechanism disposed in the sorter body for controlling the deck tilt of the sorting deck of the sorter body.
3. The fine coal fines vibratory step sorter of claim 2 further including an inclination angle sensor disposed on the sorting deck for measuring transverse and longitudinal inclination angles of the sorting deck.
4. The fine particle coal vibratory cascade separator of claim 3, further comprising a surge bin disposed at the inlet end of the separator body for buffering the material output to the inlet end of the separator body.
5. The fine particle slack coal vibratory step sorter of claim 4 further comprising a counterweight disposed in said eccentric excitation mechanism for counteracting impacts from said sorting bed body and from said sorting bed surface material vibrations of said sorting bed body.
6. The fine coal fines vibratory step sorter of claim 5 wherein the eccentric excitation mechanism is a medium to low frequency eccentric excitation mechanism.
7. The fine particle slack coal vibratory step sorter of claim 6 wherein the sorting bed surface of said sorter body is a porous trapezoidal sorting bed surface, the upper bottom of said porous trapezoidal sorting bed surface being a feed end.
8. The fine particle slack coal vibratory cascade separator of claim 7 wherein the separator body has a separator bed surface of porous corrugated sheet metal and the outlet holes have a diameter of 1mm to 1.5mm.
9. The fine particle slack coal vibratory step sorter of claim 8 further comprising a trapezoidal air distribution plate disposed at the bottom of said sorting bed surface, the aperture ratio of said trapezoidal air distribution plate being continuously adjusted by sheet metal bend angle or adjusted by different air supply channel valves.
10. The fine coal fines vibratory cascade separator of claim 9, further comprising an off-gas treatment device associated with the separator body, wherein off-gas generated by the separator body is exhausted by the induced draft fan after being dedusted by a deduster of the off-gas treatment device.
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| WO2014200225A1 (en) * | 2013-06-10 | 2014-12-18 | 강원대학교 산학협력단 | Air-vibration sorting apparatus |
| CN203944561U (en) * | 2014-07-11 | 2014-11-19 | 西安鑫龙能源技术服务有限公司 | The horizontal separator of a kind of combined type dry method |
| CN207271637U (en) * | 2017-09-12 | 2018-04-27 | 西安科技大学 | A kind of dry separation machine tool surface |
| CN109550583A (en) * | 2018-12-05 | 2019-04-02 | 中国矿业大学 | A kind of smalls vibration compound force field dry method cull eliminator and technique |
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