CN102921635B - Screw air elutriation fine-coal remover for dry classification before fine coal preparation - Google Patents
Screw air elutriation fine-coal remover for dry classification before fine coal preparation Download PDFInfo
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- CN102921635B CN102921635B CN201210437081.2A CN201210437081A CN102921635B CN 102921635 B CN102921635 B CN 102921635B CN 201210437081 A CN201210437081 A CN 201210437081A CN 102921635 B CN102921635 B CN 102921635B
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Abstract
The invention belongs to the technical field of fines removal classification before coal preparation and particularly relates to a screw air elutriation fine-coal remover for dry classification before fine coal preparation. The fine-coal remover comprises a primary classification region which uses a spiral airflow conveying method and a secondary classification region which uses a tangential airflow jetting rotating classification method. During the declining process, materials are subjected to the comprehensive action of spiral centrifugal force and airflow conveying force, intensifying classification is obtained under the comprehensive action, primary fine materials which are subjected to primary classification enter the secondary classification region, are subjected to secondary classification and are discharged, downward negative pressure is introduced into the secondary classification region, and materials can be discharged smoothly when large classification grain sizes are required. By the aid of the fine-coal remover, the problem of blocking of screening holes is solved, the classification grain sizes can be adjusted and controlled at will in a range from 0 to 13 mm in accordance with requirements, and a new technology is provided for power coal fines removing and washing.
Description
Technical field
The invention belongs to the front shedding classification technique of coal washing field, be specifically related to a kind of spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing.
Background technology
China's thermal coal aboundresources, but because China's thermal coal is mainly distributed in the north and western part, this Regional Distribution feature has determined the coal transportation and sales structure of coal in China " transporting the coal in the North to the South " and " transferring coal from the west to the east ", and there is the deficiency on transport power in China in Coal Transport, along with construction and the development of Chinese large-sized electric power stations near coal-mines, change defeated coal and become already inexorable trend for transmitting electricity.
Raising along with mining mechanization degree, in raw coal, fine coal content increases greatly, particle diameter is less than the smalls content of 13mm sometimes up to 70%～80%, and coal mostly is lower-grade metamorphic bituminous (sticky coal in jet coal, dross coal, weakly caking coal, 1/2), the lower-grade metamorphic bituminous maximum feature of ature of coal of China is that low ash, low-sulfur person are in the majority, the average ash content of raw coal can reach below 15%, if therefore can be directly separated as near coal-mine power plant coal for power generation, to greatly save transport power to alleviate the not enough problem of transport power, indirectly improve the selected ratio of lump coal simultaneously.
In coal washing, if adopt wet method to be selected in these Bed for Fine Coal, not only coal slime recovery system is complicated, the rate of recovery is low, and investment is large simultaneously, and producing cost is high, in waste resource, has also caused the destruction to environment.
For dry coal preparation, although obtain certain effect, as the application of air dense medium fluidized bed and FX type, FGX type dry-dressing machine etc., also the western part, the northern territory coal washing environment that meet the few water of arid, but effective lower limit granularity of dry coal preparation sorting is 6mm, and still often there is sieve pore blockade problem to the sieve classification of 6mm and following particle size fraction in the classifying screen using in actual production, and coal adaptability is poor, does not guarantee classification efficiency.And near coal-mine power plant requires material size to be less than 8mm with CFBB, therefore how to realize the screening of 6mm particle size fraction, to meet classification, the sorting of wholegrain level dry method, require and guarantee Circulation fluidized-bed furnace coal for power generation, be a technical barrier urgently to be resolved hurrily.
Summary of the invention
The object of this invention is to provide a kind of spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing, this powder remover can be realized partition size from 0～13mm regulation and control arbitrarily according to demand, thereby also just realized the screening of 6mm particle size fraction, the classification, the sorting that have met wholegrain level dry method require and have guaranteed Circulation fluidized-bed furnace coal for power generation, thereby have greatly improved classification and drying efficiency.
For achieving the above object, the present invention has adopted following technical scheme: a kind of spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing, and it comprises following part:
Scalping district, scalping district comprises the first classification storehouse of tubular, be provided with newel, and the upside in the first classification storehouse is provided with dedusting mouth in the first classification storehouse; On described newel, be at least arranged with a spiral separating sieve, the upside of described spiral separating sieve is provided with charging aperture, the downside of spiral separating sieve is at least provided with the first thick discharge of materials pipe and the first thin discharge of materials pipe, between the thick material discharge gate of the opening upwards of the described first thick discharge of materials pipe and the thin material discharge gate of the opening upwards of the first thin discharge of materials pipe, is provided with the guiding dividing plate of being convenient to separate material; The discharge gate of the described first thin discharge of materials pipe and the first thick discharge of materials pipe all stretches out in the outside in the first classification storehouse, and the discharge gate of the described first thin discharge of materials pipe is connected with the charging aperture in secondary grading district;
Described spiral separating sieve comprises the feeding compass screen surface that is arranged on upside and the base plate that is arranged on downside, and described feeding compass screen surface is provided with air-permeating hole; A side away from newel of described feeding compass screen surface and base plate is provided with outer side shield, and the upside at feeding compass screen surface is stretched out at the top of described outer side shield, and the lower end of outer side shield is connected with base plate; One side of the close newel of described feeding compass screen surface and base plate is provided with interior side shield, or the outer wall of described newel is connected to form interior side shield with described feeding compass screen surface with base plate; Between described feeding compass screen surface and base plate, from close newel one side, extremely away from newel one side, be provided with some demarcation strips, the upper end of described demarcation strip contacts with feeding compass screen surface, the lower end of demarcation strip is connected with base plate, and the bending direction of described outer side shield and demarcation strip matches; The region that the upside of described interior side shield, feeding compass screen surface and outer side shield surround forms the material channel being connected with the charging aperture of spiral separating sieve upside; The region that described interior side shield, feeding compass screen surface, base plate and outer side shield surround forms some gas channels of being separated by demarcation strip; The upside of described spiral separating sieve be also provided with to blow in the gas channel of spiral separating sieve for air port, describedly for place, air port, be provided with and each gas channel corresponding airduct that supplies separately;
Secondary grading district, in secondary grading district, be provided with Wind-driven rotating and drive classification mechanism, Wind-driven rotating drives the charging aperture of classification mechanism to be connected with the discharge gate of the first thin discharge of materials pipe, and described Wind-driven rotating drives the downside of classification mechanism to be provided with secondary fine granular materials feeding zone and secondary coarse granule material feeding zone.
The present invention simultaneously can also be able to further realization in the following manner:
Preferably, described feeding compass screen surface consists of the grating of several strips adjacent one another are, between two adjacent gratings, form air-permeating hole, it is smooth circular-arc that the upper surface of described grating is, and the bending direction of the grating upper surface therewith bearing of trend of the base plate at place, grating place matches, the both sides along its length of described grating are connected with outer side shield with interior side shield respectively, and the downside of grating and the upper surface of demarcation strip fit.
Further, on described spiral separating sieve, be provided with to the air compensation device of blowing in described gas channel.
Preferably, described air compensation device comprises the secondary air channel being connected with blower fan, on secondary air channel, be provided with the air-valve for regulating air volume, the air outlet of described secondary air channel is connected with described gas channel through the outer side shield of spiral separating sieve, on the demarcation strip in described spiral separating sieve, is provided with the benefit wind space of passing through for the wind in secondary air channel.
As another kind of preferred version of the present invention, described air compensation device comprises the air main being connected with blower fan, and the air-supply end of air main is provided with the some arms that are connected in parallel to each other, and described arm is corresponding one by one with the gas channel in spiral separating sieve; On the described base plate corresponding with each gas channel, be provided with air outlet, the air-supply end of described arm is connected with air outlet.
Further, the air outlet place on described base plate is covered with and makes the wind filling into along mass transport direction, enter the wind-guiding elbow of gas channel.
Preferably, the guiding direction of described guiding dividing plate is adjustable.
Preferably, the Wind-driven rotating in described secondary grading district drives classification mechanism to comprise stock grading district and the feeding zone of closed, described stock grading district comprises that secondary high-pressure sprays airduct, bend pipe buffer component and wind deflector, on the pipe shaft of described secondary high-pressure injection airduct, be provided with the charging aperture being connected with the first thin discharge of materials pipe, and secondary high-pressure sprays airduct and is connected with bend pipe buffer component, the discharging opening of bend pipe buffer component is towards wind deflector one side setting, described wind deflector is smooth curved arc shape and arranges a plurality of, the region that a plurality of wind deflectors surround forms material graded region discharge end, between adjacent wind deflector, form the air-guiding aisle that leads to stock grading district discharge end, and the top of the air intake of described air-guiding aisle is provided with pore, described stock grading district discharge end is connected with feeding zone.
Further, described feeding zone comprises the second classification storehouse, in the second classification storehouse, be provided with blanking barrel, the top of blanking barrel is uncovered shape, and the open topped of blanking barrel be arranged on stock grading district discharge end under, the little edge of open topped area of described blanking barrel is positioned at the inner side of the edge of opening of stock grading district discharge end; The inside of described blanking barrel forms the secondary fine granular materials feeding zone of passing through for secondary fine granular materials, forms the secondary coarse granule material feeding zone of passing through for secondary coarse granule material between the outer wall of blanking barrel and the inwall in the second classification storehouse; The discharging opening place of described blanking barrel is provided with and makes blanking barrel inside is the air exhauster of negative pressure region.
Beneficial effect of the present invention:
1), the present invention adopts spiral air flow to carry hierarchical approaches in scalping district, adopts tangent line jet-impingement rotation hierarchical approaches in secondary grading district.
In scalping district, material falls continually and steadily along the material channel in spiral grading sieve.In dropping process, the air-flow carrying capacity that baffle plate in material and feeding compass screen surface and spiral grading sieve is subject to providing from gas channel when colliding, thereby material is disperseed effectively, and by granule size, carry out classification under the effect of spiral centrifugal power, realized once thin material and material effective separated slightly once.
The first thin discharge of materials pipe of the first classification storehouse downside once thin material is introduced secondary grading district, once thin material is carried out secondary grading and is arranged thick by the rotation of tangent line jet-impingement, and secondary grading district introduces downward negative pressure, guaranteed when requiring partition size larger, material can be discharged smoothly and do not stayed thick.
The present invention has changed the front present situation that must use sieve shedding, classification of traditional power coal choosing when having improved classification efficiency, removed classifying screen, fundamentally solved sieve pore blockade problem, realized partition size from 0～13mm regulation and control arbitrarily according to demand, for thermal coal classification shedding enters elution for a new technology.
2) the spiral separating sieve, in the present invention is arranged around newel, and the upside of spiral separating sieve is provided with feeding compass screen surface, and downside is set to gas channel, and this double-decker has expanded the dispersion area of material effectively.In the present invention simultaneously, be also provided with the tonifying Qi pipeline to gas channel make-up gas, guaranteed that mass transport is smooth and easy, air-flow size and the air demand of tonifying Qi are simultaneously adjustable, avoided carrying in air-flow convey materials process the appearance in dead band, guarantee steady convey materials, thereby be conducive to improve classification efficiency.
3) the 13mm screen size lower limit that, the present invention is difficult to conventional screen extension set to break through is brought up to 6mm, met the best lower limit of dry coal preparation by equipment 6mm screen size, to improving the dry coal preparation efficiency of separation, be significant, also meet the dressing of coal by washing emphasis of China's thermal coal to strategic demand western and that shift in the few water of the north arid area.
4), the present invention can improve partly to enter to wash wet coal preparation the best and enter to wash lower limit, improves cleaning percent, optimizes product structure, and simplifies black water simultaneously and processes the decorum, reduces slime content, realized Coal Preparation Plant maximization of economic benefit.
5), the present invention can realize the classification of 8mm level granularity, can be directly as recirculating fluidized bed generating with not, promote to become the strategic change of defeated coal for transmitting electricity.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the cross-sectional view of spiral separating sieve.
Fig. 3 is the structural representation of feeding compass screen surface.
Fig. 4 is the syndeton schematic diagram of secondary air channel and spiral separating sieve.
Fig. 5 is the syndeton schematic diagram of air main, arm and spiral separating sieve.
Fig. 6 is the structural representation of wind-guiding elbow.
Fig. 7 is the structural representation that Wind-driven rotating drives classification mechanism.
In figure, the implication of label symbol is as follows:
10-scalping district 20-secondary grading district 21-secondary high-pressure sprays airduct
22-bend pipe buffer component 23-wind deflector 24-pore
25-stock grading district discharge end 26-blanking barrel
Bis-coarse granule material feeding zones of bis-fine granular materials feeding zone 28-of 27-
29-second classification storehouse 30-the first classification storehouse 31-newel
32-dedusting mouth 33-spiral separating sieve 331-charging aperture 332-air supply opening
333-feeding compass screen surface 333a-material channel 334-base plate 334a-baffle plate
334b-demarcation strip 334c-gas channel 335-mends wind space
336-air outlet 337-wind-guiding elbow 338-grating 339-air-permeating hole
34-air compensation device 341-secondary air channel 342-air-valve 343-air main
The thick material discharge gate of the thick discharge of materials pipe 351-of 344-arm 35-first
The thin material discharge gate of 36-the first thin discharge of materials pipe 361-37-guides dividing plate
The specific embodiment
As shown in Figure 1, 2, a kind of spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing, comprises following part:
Scalping district 10, scalping district 10 comprises in 30, the first classification storehouses 30, the first classification storehouse of tubular and is provided with newel 31, and the upside in the first classification storehouse 30 is provided with dedusting mouth 32; On described newel 31, be at least arranged with a spiral separating sieve 33, the upside of described spiral separating sieve 33 is provided with charging aperture 331, the downside of spiral separating sieve 33 is at least provided with the first thick discharge of materials pipe 35 and the first thin discharge of materials pipe 36, between the thick material discharge gate 351 of the opening upwards of the described first thick discharge of materials pipe 35 and the thin material discharge gate 361 of the opening upwards of the first thin discharge of materials pipe 36, is provided with the guiding dividing plate 37 of being convenient to separate material; The discharge gate of the described first thin discharge of materials pipe 36 and the first thick discharge of materials pipe 35 all stretches out in the outside in the first classification storehouse 30, and the discharge gate of the described first thin discharge of materials pipe 36 is connected with the charging aperture in secondary grading district 20;
Described spiral separating sieve 33 comprises the feeding compass screen surface 333 that is arranged on upside and the base plate 334 that is arranged on downside, and described feeding compass screen surface 333 is provided with air-permeating hole; A side away from newel 31 of described feeding compass screen surface 333 and base plate 334 is provided with outer side shield 334a, and the upside at feeding compass screen surface 333 is stretched out at the top of described outer side shield 334a, and the lower end of outer side shield 334a is connected with base plate 334; One side of the close newel 31 of described feeding compass screen surface 333 and base plate 334 is provided with interior side shield, or the outer wall of described newel 31 is connected to form interior side shield with described feeding compass screen surface 333 with base plate 334; Between described feeding compass screen surface 333 and base plate 334, from close newel 31 1 sides, extremely away from newel 31 1 sides, be provided with some demarcation strip 334b, the upper end of described demarcation strip 334b contacts with feeding compass screen surface 333, the lower end of demarcation strip 334b is connected with base plate 334, and the bending direction of described outer side shield 334a and demarcation strip 334b matches; Region that the upside of described interior side shield, feeding compass screen surface 333 and outer side shield 334a surround forms and spiral separating sieves the material channel 333a that the charging aperture 331 of 33 upsides is connected; The region that described interior side shield, feeding compass screen surface 333, base plate 334 and outer side shield 334a surround forms the some gas channel 334c that separated by demarcation strip 334b; The upside of described spiral separating sieve 33 be also provided with to blow in the gas channel of spiral separating sieve 33 for air port 332, describedly for 332 places, air port, be provided with the corresponding airduct that supplies separately with each gas channel 334c;
Secondary grading district 20, in secondary grading district 20, be provided with Wind-driven rotating and drive classification mechanism, Wind-driven rotating drives the charging aperture of classification mechanism to be connected with the discharge gate of the first thin discharge of materials pipe 36, and described Wind-driven rotating drives the downside of classification mechanism to be provided with secondary fine granular materials feeding zone 27 and secondary coarse granule material feeding zone 28.
Described spiral separating sieve 33 is arranged in the shape of a spiral around newel 31, effectively cloth, disperse classification area large, can make material can access abundant dispersion, be beneficial to classification, minute band.
The air port 332 that supplies of described spiral separating sieve 33 is set to many gas channels air intakes simultaneously, the large I of the intake volume of each gas channel 334c and wind speed, by independent corresponding the regulating for airduct of gas channel 334c therewith, is also also can regulating separately for wind condition is different separately of a plurality of gas channel 334c.
The upper surface of the downside of described feeding compass screen surface 333 and demarcation strip 334b fits, thereby makes the air-flow in gas channel 334c not excessive, has guaranteed the conveying effect of air-flow to material.
Described feeding compass screen surface 333 can be selected the abrasive rubber with air-vent, preferably, as shown in Figure 3, described feeding compass screen surface 333 consists of the grating 338 of several strips adjacent one another are, between two adjacent gratings 338, form air-permeating hole 339, it is smooth circular-arc that the upper surface of described grating 338 is, and the bending direction of the grating 338 upper surfaces therewith bearing of trend of the base plate 334 at grating 338 places, place matches, the both sides along its length of described grating 338 are connected with outer side shield 334a with interior side shield respectively, the upper surface of the downside of grating 338 and demarcation strip 334b fits.
Further, as shown in Figure 1, on described spiral separating sieve 33, be provided with to the air compensation device 34 of blowing in described gas channel 334c.
Air compensation device has multiple implementation, preferably, as shown in Figure 4, described air compensation device 34 comprises the secondary air channel 341 being connected with blower fan, on secondary air channel 341, be provided with the air-valve 342 for regulating air volume, the air outlet of described secondary air channel 341 is connected with described gas channel 334c through the outer side shield 334a of spiral separating sieve 33, on the demarcation strip 334b in described spiral separating sieve 33, is provided with the benefit wind space 335 of passing through for the wind in secondary air channel 341.
As another kind of preferred version of the present invention, as shown in Figure 5, described air compensation device 34 comprises the air main 343 being connected with blower fan, and the air-supply end of air main 343 is provided with the some arms 344 that are connected in parallel to each other, and described arm 344 is corresponding one by one with the gas channel 334c in spiral separating sieve 33; On the described base plate corresponding with each gas channel 334c 334, be provided with air outlet 336, the air-supply end of described arm 344 is connected with air outlet 336.
Further, air outlet 336 places on described base plate 334 are covered with and make the wind filling into along mass transport direction, enter the wind-guiding elbow 337 of material channel.
Preferably, the guiding direction of described guiding dividing plate 37 is adjustable, also guide between dividing plate 37 and thick material discharge gate 351 and thin material discharge gate 361 as being flexibly connected, be conducive to regulate according to actual needs the particle separation diameter size of material, also can need to adjust the openings of sizes of the charging aperture of the first thin discharge of materials pipe 36 and the first thick discharge of materials pipe 35 according to actual grain size.
Preferably, as shown in Fig. 1,7, the Wind-driven rotating in described secondary grading district 20 drives classification mechanism to comprise stock grading district and the feeding zone of closed, described stock grading district comprises that secondary high-pressure sprays airduct 21, bend pipe buffer component 22 and wind deflector 23, on the pipe shaft of described secondary high-pressure injection airduct 21, be provided with the charging aperture being connected with the first thin discharge of materials pipe 36, and secondary high-pressure sprays airduct 21 and is connected with bend pipe buffer component 22, the discharging opening of bend pipe buffer component 22 is towards wind deflector 23 1 side settings, described wind deflector 23 is smooth curved arc shape and arranges a plurality of, the region that a plurality of wind deflectors 23 surround forms material graded region discharge end 25, between adjacent wind deflector, form the air-guiding aisle that leads to stock grading district discharge end 25, and the top of the air intake of described air-guiding aisle is provided with pore 24, described stock grading district discharge end 25 is connected with feeding zone.
The air inlet in described the second classification storehouse 29 is comprised of two the adjacent wind deflectors 23 that are connected on the second classification storehouse 29, thereby guarantees that changeover portion material can all enter into the second classification storehouse 29 and carry out secondary grading.
Further, as shown in Fig. 1,7, described feeding zone comprises the second classification storehouse 29, in the second classification storehouse 29, be provided with blanking barrel 26, the top of blanking barrel 26 is uncovered shape, and the open topped of blanking barrel 26 be arranged on stock grading district discharge end 25 under, the little edge of open topped area of described blanking barrel 26 is positioned at the inner side of the edge of opening of stock grading district discharge end 25; The inside of described blanking barrel 26 forms the secondary fine granular materials feeding zone 27 of passing through for secondary fine granular materials, forms the secondary coarse granule material feeding zone 28 of passing through for secondary coarse granule material between the outer wall of blanking barrel 26 and the inwall in the second classification storehouse 29; The discharging opening place of described blanking barrel 26 is provided with and makes blanking barrel 26 inside is the air exhauster of negative pressure region.
The setting of air exhauster has guaranteed that material can be discharged smoothly when requiring partition size larger.
Below in conjunction with Fig. 1～7 pair course of work of the present invention, be described further.
As shown in Figure 1, scalping district 10 is also that spiral air flow is carried graded region, and it mainly contains the first classification storehouse 30, newel 31, spiral separating sieve 33 and air compensation device 34 and forms.Wherein spiral separating sieve 33 adopts double helixs to arrange the structure of newels, and has 331, two of two charging apertures for air port 332, thick material discharge gate 351, thin material discharge gate 361 and two exhaust outlets 32.Spiral separating sieve 33 in the shape of a spiral, upper and lower double-layer structure, consist of, it is feeding compass screen surface 333 at the middle and upper levels, and lower floor is base plate 334, the outer ledge of spiral separating sieve 33 is the outer side shield 334a higher than feeding compass screen surface 333, and the inside edge of spiral separating sieve 33 is the barrel of newel 31; On base plate 334, with demarcation strip 334b, base plate 334 is divided into several gas channels, and the top edge of each demarcation strip 334b all contacts with the lower surface of feeding compass screen surface 333.
Air compensation device 34 is for mending wind to each gas channel, and as shown in Figure 5, described tonifying Qi arm 344 is by wind sector air feeds such as air compressors.Discharge gate place at spiral separating sieve 33 is provided with the adjustable guiding dividing plate 37 of angle, can carry out as required partition size adjusting.On the first classification storehouse 30, be provided with the air inducing dedusting mouth 32 being connected with dust removal machine.
Air-flow passes into two for after the gas channel 334c corresponding with air supply pipe at 332 places, air port through each independent air supply pipe, material is fed along the incline direction of the feeding compass screen surface 333 of spiral separating sieve 33 respectively by two charging aperture 331 places, material is subject to the air-flow carrying capacity that in self gravitation and spiral separating sieve 33, gas channel 334c provides and moves downward along feeding compass screen surface 333 spirals, under the effect of centrifugal force, carry out large simultaneously, short grained classification, form different particle size fraction material webs, and obtain once slightly material and once thin material in the 37 places separation of guiding dividing plate, gained once thick material is discharged and is collected by the first thick discharge of materials pipe 35, once thin material falls in secondary high-pressure injection airduct 21 by the first thin discharge of materials pipe 36, thereby complete scalping.
Enter material that secondary high-pressure sprays airduct 21 and under the effect of penetrating, enter bend pipe buffer component 22 rushing of secondary high-pressure wind, bend pipe buffer component 22 is S-type, material enters the air-guiding aisle of wind deflector 23 formations along the tangential direction of wind deflector 23 through immediately, now under the effect of centrifugal force, classification obtains secondary coarse granule material and secondary fine granular materials, wherein the suction function Xia Jing stock grading district discharge end 25 of secondary fine granular materials in blanking barrel 26 enters the inner side of blanking barrel 26, and is discharged from rear collection; Secondary coarse granule material is discharged from after falling into the coarse granule material feeding zone 28 forming between the outer wall of blanking barrel 26 and the inwall in the second classification storehouse 29, thereby completes secondary grading.
Claims (8)
1. for a spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing, it is characterized in that comprising following part:
Scalping district (10), scalping district (10) comprises the first classification storehouse (30) of tubular, in the first classification storehouse (30), be provided with newel (31), and the upside in the first classification storehouse (30) is provided with dedusting mouth (32); On described newel (31), be at least arranged with a spiral separating sieve (33), the upside of described spiral separating sieve (33) is provided with charging aperture (331), the downside of spiral separating sieve (33) is at least provided with the first thick discharge of materials pipe (35) and the first thin discharge of materials pipe (36), between the thick material discharge gate (351) of the opening upwards of the described first thick discharge of materials pipe (35) and the thin material discharge gate (361) of the opening upwards of the first thin discharge of materials pipe (36), is provided with the guiding dividing plate (37) of being convenient to separate material; The discharge gate of the described first thin discharge of materials pipe (36) and the first thick discharge of materials pipe (35) all stretches out in the outside in the first classification storehouse (30), and the discharge gate of the described first thin discharge of materials pipe (36) is connected with the charging aperture of secondary grading district (20);
Described spiral separating sieve (33) comprises the feeding compass screen surface (333) that is arranged on upside and the base plate (334) that is arranged on downside, and described feeding compass screen surface (333) is provided with air-permeating hole; A side away from newel (31) of described feeding compass screen surface (333) and base plate (334) is provided with outer side shield (334a), the upside in feeding compass screen surface (333) is stretched out at the top of described outer side shield (334a), and the lower end of outer side shield (334a) is connected with base plate (334); One side of the close newel (31) of described feeding compass screen surface (333) and base plate (334) is provided with interior side shield, or the outer wall of described newel (31) is connected to form interior side shield with described feeding compass screen surface (333) with base plate (334); Between described feeding compass screen surface (333) and base plate (334), from close newel (31) one sides, extremely away from newel (31) one sides, be provided with some demarcation strips (334b), the upper end of described demarcation strip (334b) contacts with feeding compass screen surface (333), the lower end of demarcation strip (334b) is connected with base plate (334), and the bending direction of described outer side shield (334a) and demarcation strip (334b) matches; The region that the upside of described interior side shield, feeding compass screen surface (333) and outer side shield (334a) surround forms the material channel (333a) being connected with the charging aperture (331) of spiral separating sieve (33) upside; The region that described interior side shield, feeding compass screen surface (333), base plate (334) and outer side shield (334a) surround forms some gas channels (334c) of being separated by demarcation strip (334b); The upside of described spiral separating sieve (33) be also provided with to blow in the gas channel of spiral separating sieve (33) for air port (332), describedly for air port (332), locate to be provided with and each gas channel (334c) corresponding airduct that supplies separately;
Secondary grading district (20), in secondary grading district (20), be provided with Wind-driven rotating and drive classification mechanism, Wind-driven rotating drives the charging aperture of classification mechanism to be connected with the discharge gate of the first thin discharge of materials pipe (36), and described Wind-driven rotating drives the downside of classification mechanism to be provided with secondary fine granular materials feeding zone (27) and secondary coarse granule material feeding zone (28);
On described spiral separating sieve (33), be provided with to the air compensation device (34) of the middle air-supply of described gas channel (334c).
2. the spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing according to claim 1, it is characterized in that: described feeding compass screen surface (333) consists of the grating (338) of several strips adjacent one another are, between two adjacent gratings (338), form air-permeating hole (339), it is smooth circular-arc that the upper surface of described grating (338) is, and the bending direction of grating (338) the upper surface therewith bearing of trend of the base plate (334) at place, grating (338) place matches, the both sides along its length of described grating (338) are connected with outer side shield (334a) with interior side shield respectively, the upper surface of the downside of grating (338) and demarcation strip (334b) fits.
3. the spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing according to claim 1, it is characterized in that: described air compensation device (34) comprises the secondary air channel (341) being connected with blower fan, on secondary air channel (341), be provided with the air-valve (342) for regulating air volume, the air outlet of described secondary air channel (341) is connected with described gas channel through the outer side shield (334a) of spiral separating sieve (33), is provided with the benefit wind space (335) of passing through for the wind in secondary air channel (341) on the demarcation strip (334b) in described spiral separating sieve (33).
4. the spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing according to claim 1, it is characterized in that: described air compensation device (34) comprises the air main (343) being connected with blower fan, the air-supply end of air main (343) is provided with the some arms (344) that are connected in parallel to each other, and described arm (344) is corresponding one by one with the gas channel in spiral separating sieve (33); On the described base plate corresponding with each gas channel (334), be provided with air outlet (336), the air-supply end of described arm (344) is connected with air outlet (336).
5. the spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing according to claim 4, is characterized in that: the air outlet (336) on described base plate (334) is located to be covered with and made the wind filling into along mass transport direction, enter the wind-guiding elbow (337) of gas channel.
6. according to the spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing described in claim 2～5 any one, it is characterized in that: the guiding direction of described guiding dividing plate (37) is adjustable.
7. the spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing according to claim 1, is characterized in that: the Wind-driven rotating in described secondary grading district (20) drives classification mechanism to comprise stock grading district and the feeding zone of closed, described stock grading district comprises that secondary high-pressure sprays airduct (21), bend pipe buffer component (22) and wind deflector (23), on the pipe shaft of described secondary high-pressure injection airduct (21), be provided with the charging aperture being connected with the first thin discharge of materials pipe (36), and secondary high-pressure sprays airduct (21) and is connected with bend pipe buffer component (22), the discharging opening of bend pipe buffer component (22) is towards wind deflector (23) one side settings, described wind deflector (23) is smooth curved arc shape and arranges a plurality of, the region that a plurality of wind deflectors (23) surround forms material graded region discharge end (25), between adjacent wind deflector, form the air-guiding aisle that leads to stock grading district discharge end (25), and the top of the air intake of described air-guiding aisle is provided with pore (24), described stock grading district discharge end (25) is connected with feeding zone.
8. the spiral pneumatic jig powder remover for dry classification before Bed for Fine Coal choosing according to claim 7, it is characterized in that: described feeding zone comprises the second classification storehouse (29), in the second classification storehouse (29), be provided with blanking barrel (26), the top of blanking barrel (26) is uncovered shape, and the open topped of blanking barrel (26) be arranged on stock grading district discharge end (25) under, the little edge of open topped area of described blanking barrel (26) is positioned at the inner side of the edge of opening of stock grading district discharge end (25); The inside of described blanking barrel (26) forms the secondary fine granular materials feeding zone (27) of passing through for secondary fine granular materials, forms the secondary coarse granule material feeding zone (28) of passing through for secondary coarse granule material between the outer wall of blanking barrel (26) and the inwall in the second classification storehouse (29); The discharging opening place of described blanking barrel (26) is provided with and makes blanking barrel (26) inside is the air exhauster of negative pressure region.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210437081.2A CN102921635B (en) | 2012-10-26 | 2012-10-26 | Screw air elutriation fine-coal remover for dry classification before fine coal preparation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210437081.2A CN102921635B (en) | 2012-10-26 | 2012-10-26 | Screw air elutriation fine-coal remover for dry classification before fine coal preparation |
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| CN102921635A CN102921635A (en) | 2013-02-13 |
| CN102921635B true CN102921635B (en) | 2014-12-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104438047A (en) * | 2014-11-07 | 2015-03-25 | 四川旭华制药有限公司 | Rotary vibrating screen of spiral structure |
| CN108499845A (en) * | 2018-05-31 | 2018-09-07 | 华中科技大学 | A kind of anti-blocking charging device for vacuum pressure conveying |
| CN110681586B (en) * | 2018-07-05 | 2021-06-15 | 江西师范大学 | Carbon black classified screening device |
| CN109396042B (en) * | 2018-12-19 | 2024-03-19 | 吉林铁阳盛日循环科技有限公司 | Broken particle sorting device and method for lithium ion batteries |
| CN110293052A (en) * | 2019-07-02 | 2019-10-01 | 陈大鹏 | A kind of industrial process waters mud dedusting filter |
| CN110538789B (en) * | 2019-09-02 | 2021-08-24 | 马鞍山市新桥工业设计有限公司 | Ore screening device and using method thereof |
| CN113182069B (en) * | 2021-05-10 | 2023-04-18 | 四川康特能药业有限公司 | Raw medicinal material screening plant in traditional chinese medicine pill preparation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3917567A (en) * | 1974-09-30 | 1975-11-04 | City Of San Diego | Air classifier for shredded refuse |
| DE3125858A1 (en) * | 1981-07-01 | 1983-01-20 | Deutsche Babcock Ag, 4200 Oberhausen | Vane classifier for a mill |
| SU1711995A1 (en) * | 1989-07-24 | 1992-02-15 | Уральский научно-исследовательский институт черных металлов | Method of recovering abrasive materials from metallurgical slags |
| CN2467207Y (en) * | 2000-12-22 | 2001-12-26 | 唐山市选煤成套设备厂 | Combined compound sorting unit by dry method |
| CN2520951Y (en) * | 2002-01-25 | 2002-11-20 | 朱常先 | Fanning coal cleaning machine |
| US7159807B2 (en) * | 2004-09-29 | 2007-01-09 | Montag Roger A | Granular material grinder and method of use |
| CN100349662C (en) * | 2005-08-26 | 2007-11-21 | 杨国华 | Dry type gradation equipment for coal |
| CN202845332U (en) * | 2012-10-26 | 2013-04-03 | 安徽理工大学 | Spiral flow powder removing machine for dry grading of fine coal before selection |
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