CN202845332U - Spiral flow powder removing machine for dry grading of fine coal before selection - Google Patents
Spiral flow powder removing machine for dry grading of fine coal before selection Download PDFInfo
- Publication number
- CN202845332U CN202845332U CN 201220580116 CN201220580116U CN202845332U CN 202845332 U CN202845332 U CN 202845332U CN 201220580116 CN201220580116 CN 201220580116 CN 201220580116 U CN201220580116 U CN 201220580116U CN 202845332 U CN202845332 U CN 202845332U
- Authority
- CN
- China
- Prior art keywords
- air
- grading
- feeding
- spiral
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The utility model belongs to the technical field of powder removing and grading before washing and selection of coal, in particular to a spiral flow powder removing machine for dry grading of fine coal before selection. The spiral flow powder removing machine for the dry grading of the fine coal before the selection comprises a primary grading zone by adopting a manner of spiral flow transport grading and a secondary grading zone by adopting a manner of tangent airflow jet rotation grading. According to the spiral flow powder removing machine for the dry grading of the fine coal before the selection, materials are firstly enabled to bear a combined effect of spiral centrifugal force and airflow transport force in the process of descent and are reinforced and graded under the combined effect, primary fine materials after a primary grading enter the secondary grading zone to be secondarily graded and discharged, and downward negative pressure is introduced into the secondary grading zone so that smooth discharge of the materials can be ensured when grading granularity is required to be large. The spiral flow powder removing machine for the dry grading of the fine coal before the selection fundamentally solves the problem of sieve clogging, achieves a free regulation of grading granularity from 0-13 millimeters according to demand, and therefore a novel technology is provided for powder removing and washing of steam coal.
Description
Technical field
The utility model belongs to the front shedding classification technique field of coal washing, is specifically related to a kind of spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing.
Background technology
China's thermal coal aboundresources, but because China's thermal coal mainly is distributed in the north and western part, this Regional Distribution characteristics have 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 deficiency on the 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 transmission of electricity.
Raising along with the mining mechanization degree, fine coal content increases greatly in the raw coal, particle diameter less than the smalls content of 13mm sometimes up to 70%～80%, and coal mostly is lower-grade metamorphic bituminous (sticking coal in jet coal, dross coal, the weakly caking coal, 1/2), the lower-grade metamorphic bituminous maximum characteristics of ature of coal of China are that low ash, low-sulfur person are in the majority, the average ash content of raw coal can reach below 15%, if therefore can directly separate the coal for power generation as near coal-mine power plant, to greatly save transport power to alleviate the not enough problem of transport power, indirectly improve simultaneously the selected ratio of lump coal.
In coal washing, if adopt wet method that these Bed for Fine Coal are selected in, then not only the coal slime recovery system is complicated, the rate of recovery is low, and investment is large simultaneously, and producing cost is high, has also caused environmental disruption in the waste resource.
For dry coal preparation, although obtain certain effect, application such as air dense medium fluidized bed and FX type, FGX type dry-dressing machine etc., the western part, the northern territory coal washing environment that also meet the few water of arid, but effective lower limit granularity of dry coal preparation sorting is 6mm, and the classifying screen that uses in the actual production sieve pore blockade problem still often occurs to the sieve classification of 6mm and following particle size fraction, and coal adaptability is poor, does not guarantee classification efficiency.And near coal-mine power plant requires material size less than 8mm with CFBB, therefore how to realize the screening of 6mm particle size fraction, require and guarantee the Circulation fluidized-bed furnace coal for power generation with classification, the sorting of satisfying wholegrain level dry method, and be a technical barrier that needs to be resolved hurrily.
The utility model content
The purpose of this utility model provides a kind of spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing, this powder remover can realize that partition size is from according to demand arbitrarily regulation and control of 0～13mm, thereby also just realized the screening of 6mm particle size fraction, classification, the sorting of having satisfied wholegrain level dry method requires and guaranteed the Circulation fluidized-bed furnace coal for power generation, thereby greatly improved classification and drying efficiency.
For achieving the above object, the utility model has adopted following technical scheme: a kind of spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing, and it comprises following part:
Scalping district, scalping district comprise the first classification storehouse of tubular, be provided with newel in the first classification storehouse, and the upside in the first classification storehouse are provided with the dedusting mouth; At least be arranged with a spiral separating sieve on the described newel, the upside of described spiral separating sieve is provided with charging aperture, the downside of spiral separating sieve is provided with the first thick discharge of materials pipe and the first thin discharge of materials pipe at least, is provided with the guiding dividing plate of being convenient to separate material between the thin material discharge gate of the thick material discharge gate of the opening upwards of the described first thick discharge of materials pipe and the opening upwards of the first thin discharge of materials pipe; 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 is arranged on the base plate of downside that described feeding compass screen surface is provided with air-permeating hole; Side away from newel of described feeding compass screen surface and base plate is provided with outer side shield, and the upside at the feeding compass screen surface is stretched out at the top of described outer side shield, and the lower end of outer side shield links to each other with base plate; One side of the close newel of described feeding compass screen surface and base plate is provided with interior side shield, and perhaps the outer wall of described newel links to each other to consist of interior side shield with described feeding compass screen surface with base plate; Extremely be provided with some demarcation strips away from newel one side from close newel one side between described feeding compass screen surface and the base plate, the upper end of described demarcation strip contacts with the feeding compass screen surface, the lower end of demarcation strip links to each other with base plate, and the bending direction of described outer side shield and demarcation strip matches; The zone that the upside of described interior side shield, feeding compass screen surface and outer side shield surround consists of the material channel that is connected with the charging aperture of spiral separating sieve upside; The zone that described interior side shield, feeding compass screen surface, base plate and outer side shield surround consists of some gas channels of being separated by demarcation strip; The upside of described spiral separating sieve also be provided with blow in the gas channel of spiral separating sieve for the air port, describedly be provided with and the independent corresponding airduct that supplies of each gas channel for the place, air port;
The secondary grading district, be provided with Wind-driven rotating in the secondary grading district and drive classification mechanism, the charging aperture that Wind-driven rotating drives classification mechanism is connected with the discharge gate of the first thin discharge of materials pipe, and the downside that described Wind-driven rotating drives classification mechanism is provided with secondary fine granular materials feeding zone and secondary coarse granule material feeding zone.
The utility model can also be able to further realization in the following manner simultaneously:
Preferably, described feeding compass screen surface is made of the grating of several strips adjacent one another are, consist of air-permeating hole between the two adjacent gratings, 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 direction of described grating link to each other with outer side shield with interior side shield respectively, and the downside of grating and the upper surface of demarcation strip fit.
Further, be provided with the air compensation device of blowing in the described gas channel on the described spiral separating sieve.
Preferably, described air compensation device comprises the secondary air channel that links to each other with blower fan, be provided with the air-valve for regulating air volume on the secondary air channel, the outer side shield that the air outlet of described secondary air channel passes the spiral separating sieve is connected with described gas channel, is provided with the benefit wind space of passing through for the wind in the secondary air channel on the demarcation strip in the described spiral separating sieve.
As another kind of preferred version of the present utility model, described air compensation device comprises the air main that links to each other 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 the gas channel in described arm and the spiral separating sieve is corresponding one by one; Be provided with air outlet on the described base plate corresponding with each gas channel, the air-supply end of described arm links to each other with air outlet.
Further, the air outlet place on the described base plate is covered with the wind-guiding elbow that makes the wind that fills into enter gas channel along the mass transport direction.
Preferably, the guiding direction of described guiding dividing plate is adjustable.
Preferably, the Wind-driven rotating in the described secondary grading district drives stock grading district and the feeding zone that classification mechanism comprises closed; Described stock grading district comprises that secondary high-pressure sprays airduct, bend pipe buffer component and wind deflector, be provided with the charging aperture that is connected with the first thin discharge of materials pipe on the pipe shaft of described secondary high-pressure injection airduct, and secondary high-pressure sprays airduct and is connected with the 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 zone that a plurality of wind deflectors surround consists of material graded region discharge end, consist of the air-guiding aisle that leads to stock grading district discharge end between the adjacent wind deflector, 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, be provided with blanking barrel in the second classification storehouse, 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 inboard of the edge of opening of stock grading district discharge end; The inside of described blanking barrel consists of the secondary fine granular materials feeding zone that passes through for the secondary fine granular materials, consists of the secondary coarse granule material feeding zone that passes through for secondary coarse granule material between the inwall in the outer wall of blanking barrel and the second classification storehouse; The discharging opening place of described blanking barrel is provided with and makes blanking barrel inside be the air exhauster of negative pressure region.
The beneficial effects of the utility model:
1), the utility model adopts spiral air flow conveying hierarchical approaches, employing tangent line jet-impingement rotation hierarchical approaches in the secondary grading district in the scalping district.
In the scalping district, material falls continually and steadily along the material channel in the spiral grading sieve.In dropping process, the air-flow carrying capacity that provides from gas channel is provided when colliding baffle plate in material and feeding compass screen surface and the spiral grading sieve, thereby material is disperseed effectively, and under the effect of spiral centrifugal power, carry out classification by granule size, realized once carefully material and the once effective separation of thick material.
The first thin discharge of materials pipe of the first classification storehouse downside once thin material is introduced the secondary grading district, once thin material carries out secondary grading and arranges thick by the rotation of tangent line jet-impingement, and the secondary grading district introduces downward negative pressure, guaranteed that when requiring partition size larger material can be discharged smoothly and do not stayed thick.
The utility model 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 the sieve pore blockade problem, realized that partition size is from according to demand arbitrarily regulation and control of 0～13mm, for thermal coal classification shedding enters elution for a new technology.
2), the sieve of the spiral separating in the utility model arranges around newel, the upside of spiral separating sieve is provided with the feeding compass screen surface, downside is set to gas channel, this double-decker has enlarged the dispersion area of material effectively.Also be provided with simultaneously the tonifying Qi pipeline to the gas channel make-up gas in the utility model, guaranteed that mass transport is smooth and easy, air-flow size and the air demand of simultaneously tonifying Qi are adjustable, avoided carrying in the air-flow convey materials process appearance in dead band, guarantee steady convey materials, thereby be conducive to improve classification efficiency.
3), the utility model is brought up to 6mm with the 13mm screen size lower limit that the conventional screen extension set is difficult to break through, satisfied the best lower limit of dry coal preparation with equipment 6mm screen size, be significant to improving the dry coal preparation efficiency of separation, 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 utility model can improve partly to enter to wash wet coal preparation the best and enter to wash limit, improves cleaning percent, optimizes product structure, and simplifies simultaneously black water and processes the decorum, reduces slime content, realized the Coal Preparation Plant maximization of economic benefit.
5), the utility model can realize the classification of 8mm level granularity, can be directly as the recirculating fluidized bed generating with not having, promote to become the strategic change of defeated coal for transmitting electricity.
Description of drawings
Fig. 1 is structural representation of the present utility model.
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.
The implication of label symbol is as follows among the figure:
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
27-secondary fine granular materials feeding zone 28-secondary coarse granule material feeding zone
29-the 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 the wind space
336-air-supply 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 344-arm 35-the first thick discharge of materials pipe 351-
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 air flow powder remover for dry classification before the Bed for Fine Coal choosing comprises following part:
Scalping district 10, scalping district 10 comprise in 30, the first classification storehouses 30, the first classification storehouse of tubular and are provided with newel 31, and the upside in the first classification storehouse 30 is provided with dedusting mouth 32; At least be arranged with a spiral separating sieve 33 on the described newel 31, the upside of described spiral separating sieve 33 is provided with charging aperture 331, the downside of spiral separating sieve 33 is provided with the first thick discharge of materials pipe 35 and the first thin discharge of materials pipe 36 at least, is provided with the guiding dividing plate 37 of being convenient to separate material between the thin material discharge gate 361 of the thick material discharge gate 351 of the opening upwards of the described first thick discharge of materials pipe 35 and the opening upwards of the first thin discharge of materials pipe 36; 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; 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 links to each other 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, and perhaps the outer wall of described newel 31 links to each other to consist of interior side shield with described feeding compass screen surface 333 with base plate 334; Extremely be provided with some demarcation strip 334b away from newel 31 1 sides from close newel 31 1 sides between described feeding compass screen surface 333 and the base plate 334, the upper end of described demarcation strip 334b contacts with feeding compass screen surface 333, the lower end of demarcation strip 334b links to each other with base plate 334, and the bending direction of described outer side shield 334a and demarcation strip 334b matches; Zone that the upside of described interior side shield, feeding compass screen surface 333 and outer side shield 334a surround consists of and spiral separating sieves the material channel 333a that the charging aperture 331 of 33 upsides is connected; The zone that described interior side shield, feeding compass screen surface 333, base plate 334 and outer side shield 334a surround consists of the some gas channel 334c that separated by demarcation strip 334b; The upside of described spiral separating sieve 33 also be provided with blow in the gas channel of spiral separating sieve 33 for air port 332, describedly be provided with the independent corresponding airduct that supplies with each gas channel 334c for 332 places, air port;
Secondary grading district 20, be provided with Wind-driven rotating in the secondary grading district 20 and drive classification mechanism, the charging aperture that Wind-driven rotating drives classification mechanism is connected with the discharge gate of the first thin discharge of materials pipe 36, and the downside that described Wind-driven rotating drives classification mechanism is 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 the 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 simultaneously air intakes of many gas channels, the large I of the intake volume of each gas channel 334c and wind speed is regulated for airduct by gas channel 334c therewith is corresponding separately, also is the different and can regulate separately separately for wind condition 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 among the 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 is made of the grating 338 of several strips adjacent one another are, consist of air-permeating hole 339 between the two adjacent gratings 338, 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 place, grating 338 places matches, the both sides along its length direction of described grating 338 link to each other with outer side shield 334a with interior side shield respectively, and the upper surface of the downside of grating 338 and demarcation strip 334b fits.
Further, as shown in Figure 1, be provided with the air compensation device 34 of blowing in the described gas channel 334c on the described spiral separating sieve 33.
Air compensation device has multiple implementation, preferably, as shown in Figure 4, described air compensation device 34 comprises the secondary air channel 341 that links to each other with blower fan, be provided with the air-valve 342 for regulating air volume on the secondary air channel 341, the outer side shield 334a that the air outlet of described secondary air channel 341 passes spiral separating sieve 33 is connected with described gas channel 334c, is provided with the benefit wind space 335 of passing through for the wind in the secondary air channel 341 on the demarcation strip 334b in the described spiral separating sieve 33.
As another kind of preferred version of the present utility model, as shown in Figure 5, described air compensation device 34 comprises the air main 343 that links to each other 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 that spiral separating sieves in 33; Be provided with air outlet 336 on the described base plate corresponding with each gas channel 334c 334, the air-supply end of described arm 344 links to each other with air outlet 336.
Further, air outlet 336 places on the described base plate 334 are covered with the wind-guiding elbow 337 that makes the wind that fills into enter material channel along the mass transport direction.
Preferably, the guiding direction of described guiding dividing plate 37 is adjustable, also namely guide between dividing plate 37 and thick material discharge gate 351 and the 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 namely can adjust according to the actual grain size needs 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.
Preferably, shown in Fig. 1,7, the Wind-driven rotating in the described secondary grading district 20 drives stock grading district and the feeding zone that classification mechanism comprises closed; Described stock grading district comprises that secondary high-pressure sprays airduct 21, bend pipe buffer component 22 and wind deflector 23, be provided with the charging aperture that is connected with the first thin discharge of materials pipe 36 on the pipe shaft of described secondary high-pressure injection airduct 21, 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 zone that a plurality of wind deflectors 23 surround consists of material graded region discharge end 25, consist of the air-guiding aisle that leads to stock grading district discharge end 25 between the adjacent wind deflector, 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 the changeover portion material can all enter into the second classification storehouse 29 and carry out secondary grading.
Further, shown in Fig. 1,7, described feeding zone comprises the second classification storehouse 29, be provided with blanking barrel 26 in the second classification storehouse 29, 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 inboard of the edge of opening of stock grading district discharge end 25; The inside of described blanking barrel 26 consists of the secondary fine granular materials feeding zone 27 that passes through for the secondary fine granular materials, consists of the secondary coarse granule material feeding zone 28 that passes through for secondary coarse granule material between the inwall in the outer wall of blanking barrel 26 and the second classification storehouse 29; The discharging opening place of described blanking barrel 26 is provided with and makes blanking barrel 26 inside be 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.
Be described further below in conjunction with Fig. 1～7 pair course of work of the present utility model.
As shown in Figure 1, scalping district 10 also is that spiral air flow is carried graded region, and it mainly contains the first classification storehouse 30, newel 31, spiral separating sieve 33 and making-up air 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, be comprised of upper and lower double-layer structure, 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 that is higher than feeding compass screen surface 333, and the inside edge of spiral separating sieve 33 is the barrel of newel 31; With demarcation strip 334b base plate 334 is divided into several gas channels on the base plate 334, and the top edge of each demarcation strip 334b contacts with the lower surface of feeding compass screen surface 333 all.
Making-up air device 34 is used for each gas channel is mended wind, 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 and regulate.Be provided with the air inducing dedusting mouth 32 that is connected with dust removal machine on the first classification storehouse 30.
Air-flow passes into two for behind 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 subjected to the air-flow carrying capacity that gas channel 334c provides in self gravitation and the spiral separating sieve 33 and moves downward along feeding compass screen surface 333 spirals, under the effect of centrifugal force, carry out simultaneously large, short grained classification, form different particle size fraction material webs, and separate at guiding dividing plate 37 places and to obtain once thick material and material carefully once, gained once thick material is discharged and is collected by the first thick discharge of materials pipe 35, once thin material then falls in the secondary high-pressure injection airduct 21 by the first thin discharge of materials pipe 36, thereby finishes scalping.
The material that enters secondary high-pressure injection airduct 21 enters bend pipe buffer component 22 rushing of secondary high-pressure wind under the effect of penetrating, bend pipe buffer component 22 is S-type, material is through entering the air-guiding aisle that wind deflector 23 consists of along the tangential direction of wind deflector 23 immediately, this moment, classification under the effect of centrifugal force obtained secondary coarse granule material and secondary fine granular materials, wherein enter the inboard of blanking barrel 26 through stock grading district discharge end 25 under the suction function of secondary fine granular materials in blanking barrel 26, and be discharged from rear collection; Secondary coarse granule material is discharged from after then falling into the coarse granule material feeding zone 28 that consists of between the inwall in the outer wall of blanking barrel 26 and the second classification storehouse 29, thereby finishes secondary grading.
Claims (9)
1. one kind is used for the spiral air flow powder remover that Bed for Fine Coal is selected front dry classification, it is characterized in that comprising following part:
Scalping district (10), scalping district (10) comprises the first classification storehouse (30) of tubular, be provided with newel (31) in the first classification storehouse (30), and the upside in the first classification storehouse (30) is provided with dedusting mouth (32); At least be arranged with a spiral separating sieve (33) on the described newel (31), the upside of described spiral separating sieve (33) is provided with charging aperture (331), the downside of spiral separating sieve (33) is provided with the first thick discharge of materials pipe (35) and the first thin discharge of materials pipe (36) at least, is provided with the guiding dividing plate (37) of being convenient to separate material between the thin material discharge gate (361) of the thick material discharge gate (351) of the opening upwards of the described first thick discharge of materials pipe (35) and the opening upwards of the first thin discharge of materials pipe (36); 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; 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) links to each other 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, and perhaps the outer wall of described newel (31) links to each other to consist of interior side shield with described feeding compass screen surface (333) with base plate (334); Extremely be provided with some demarcation strips (334b) away from newel (31) one sides from close newel (31) one sides between described feeding compass screen surface (333) and the base plate (334), the upper end of described demarcation strip (334b) contacts with feeding compass screen surface (333), the lower end of demarcation strip (334b) links to each other with base plate (334), and the bending direction of described outer side shield (334a) and demarcation strip (334b) matches; The zone that the upside of described interior side shield, feeding compass screen surface (333) and outer side shield (334a) surround consists of the material channel (333a) that is connected with the charging aperture (331) of spiral separating sieve (33) upside; The zone that described interior side shield, feeding compass screen surface (333), base plate (334) and outer side shield (334a) surround consists of some gas channels (334c) of being separated by demarcation strip (334b); The upside of described spiral separating sieve (33) also is provided with to spiral separating and sieves the air feed (332) of blowing in the gas channel of (33), and described air feed (332) is located to be provided with and the independent corresponding confession airduct of each gas channel (334c);
Secondary grading district (20), be provided with Wind-driven rotating in the secondary grading district (20) and drive classification mechanism, the charging aperture that Wind-driven rotating drives classification mechanism is connected with the discharge gate of the first thin discharge of materials pipe (36), and the downside that described Wind-driven rotating drives classification mechanism is provided with secondary fine granular materials feeding zone (27) and secondary coarse granule material feeding zone (28).
2. the spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 1, it is characterized in that: described feeding compass screen surface (333) is made of the grating (338) of several strips adjacent one another are, consist of air-permeating hole (339) between the two adjacent gratings (338), 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 direction of described grating (338) link to each other with outer side shield (334a) with interior side shield respectively, and the upper surface of the downside of grating (338) and demarcation strip (334b) fits.
3. the spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 1 is characterized in that: be provided with to the air compensation device (34) of the middle air-supply of described gas channel (334c) on the described spiral separating sieve (33).
4. the spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 3, it is characterized in that: described air compensation device (34) comprises the secondary air channel (341) that links to each other with blower fan, be provided with the air-valve (342) for regulating air volume on the secondary air channel (341), the outer side shield (334a) that the air outlet of described secondary air channel (341) passes spiral separating sieve (33) is connected with described gas channel, is provided with the benefit wind space (335) of passing through for the wind in the secondary air channel (341) on the demarcation strip (334b) in the described spiral separating sieve (33).
5. the spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 3, it is characterized in that: described air compensation device (34) comprises the air main (343) that links to each other 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 that spiral separating sieves in (33); Be provided with air-supply (336) on the described base plate corresponding with each gas channel (334), the air-supply end of described arm (344) links to each other with air-supply (336).
6. the spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 5, it is characterized in that: the air outlet (336) on the described base plate (334) locates to be covered with the wind-guiding elbow (337) that makes the wind that fills into enter gas channel along the mass transport direction.
7. each described spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 2～6, it is characterized in that: the guiding direction of described guiding dividing plate (37) is adjustable.
8. the spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 1, it is characterized in that: the Wind-driven rotating in the described secondary grading district (20) drives stock grading district and the feeding zone that classification mechanism comprises closed; Described stock grading district comprises that secondary high-pressure sprays airduct (21), bend pipe buffer component (22) and wind deflector (23), be provided with the charging aperture that is connected with the first thin discharge of materials pipe (36) on the pipe shaft of described secondary high-pressure injection airduct (21), 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 zone that a plurality of wind deflectors (23) surround consists of material graded region discharge end (25), consist of the air-guiding aisle that leads to stock grading district discharge end (25) between the adjacent wind deflector, 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.
9. the spiral air flow powder remover for dry classification before the Bed for Fine Coal choosing according to claim 8, it is characterized in that: described feeding zone comprises the second classification storehouse (29), be provided with blanking barrel (26) in the second classification storehouse (29), 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 inboard of the edge of opening of stock grading district discharge end (25); The inside of described blanking barrel (26) consists of the secondary fine granular materials feeding zone (27) that passes through for the secondary fine granular materials, consists of the secondary coarse granule material feeding zone (28) that passes through for secondary coarse granule material between the inwall in the outer wall of blanking barrel (26) and the second classification storehouse (29); The discharging opening place of described blanking barrel (26) is provided with and makes blanking barrel (26) inside be the air exhauster of negative pressure region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220580116 CN202845332U (en) | 2012-10-26 | 2012-10-26 | Spiral flow powder removing machine for dry grading of fine coal before selection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220580116 CN202845332U (en) | 2012-10-26 | 2012-10-26 | Spiral flow powder removing machine for dry grading of fine coal before selection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202845332U true CN202845332U (en) | 2013-04-03 |
Family
ID=47976568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220580116 Withdrawn - After Issue CN202845332U (en) | 2012-10-26 | 2012-10-26 | Spiral flow powder removing machine for dry grading of fine coal before selection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202845332U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921635A (en) * | 2012-10-26 | 2013-02-13 | 安徽理工大学 | Screw air elutriation fine-coal remover for dry classification before fine coal preparation |
| CN104259104A (en) * | 2014-09-24 | 2015-01-07 | 王雪 | Totally-closed continuous airflow power coal separator with vibrating barrel |
| CN104741316A (en) * | 2013-12-25 | 2015-07-01 | 北京康普锡威科技有限公司 | Powder grading device and method |
| CN107649357A (en) * | 2017-11-01 | 2018-02-02 | 无锡宇能选煤机械厂 | Carry the spiral screen of buffer-type feeding channel |
| CN111974682A (en) * | 2020-08-25 | 2020-11-24 | 中国石油大学(北京) | Particle grading device |
-
2012
- 2012-10-26 CN CN 201220580116 patent/CN202845332U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921635A (en) * | 2012-10-26 | 2013-02-13 | 安徽理工大学 | Screw air elutriation fine-coal remover for dry classification before fine coal preparation |
| CN104741316A (en) * | 2013-12-25 | 2015-07-01 | 北京康普锡威科技有限公司 | Powder grading device and method |
| CN104741316B (en) * | 2013-12-25 | 2016-08-17 | 北京康普锡威科技有限公司 | A kind of powder classification device and method |
| CN104259104A (en) * | 2014-09-24 | 2015-01-07 | 王雪 | Totally-closed continuous airflow power coal separator with vibrating barrel |
| CN104259104B (en) * | 2014-09-24 | 2015-12-02 | 王雪 | A kind of totally-enclosed vibration cylindrical shell continuous flow power coal picker |
| CN107649357A (en) * | 2017-11-01 | 2018-02-02 | 无锡宇能选煤机械厂 | Carry the spiral screen of buffer-type feeding channel |
| CN111974682A (en) * | 2020-08-25 | 2020-11-24 | 中国石油大学(北京) | Particle grading device |
| CN111974682B (en) * | 2020-08-25 | 2024-06-04 | 中国石油大学(北京) | Particle classification device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102921635B (en) | Screw air elutriation fine-coal remover for dry classification before fine coal preparation | |
| CN102784757B (en) | Efficient airflow classification fine-coal remover for power coal before selecting | |
| CN202845332U (en) | Spiral flow powder removing machine for dry grading of fine coal before selection | |
| CN202725512U (en) | Full-grain high-efficiency dry coal preparation system for power coal separation | |
| CN208542555U (en) | A kind of Novel wind powder concentrator | |
| CN100496755C (en) | Environment-friendly energy-saving multi-functional lime pulverizer | |
| CN206286201U (en) | Wood chip sorting unit | |
| CN203002448U (en) | Cement open-circuit grinding system with powder pre-selecting function | |
| CN103111453A (en) | Multi-bed coupling cooperation and interaction type device for separating multicomponent mixture by thermal current | |
| CN107377391A (en) | A kind of different gravity separation device of the air-flow of house refuse | |
| CN102019275A (en) | Airflow classifying and airflow drying process for coking coal | |
| CN201560175U (en) | Airflow classifying and drying device for coking coal | |
| CN206793856U (en) | A kind of width, which enters, carefully goes out the adjustable CFB furnace sodalime stone desulfurizing agent preparation system of particle diameter | |
| CN204816700U (en) | Material grinding system | |
| CN204974227U (en) | Skirt pendulum -type dry powder material grader | |
| CN202725501U (en) | Fines removal all-in-one machine used for dry-method classification before steam coal preparation | |
| CN101724422B (en) | Device for drying and sieving coal by wind power | |
| CN208810261U (en) | A kind of normal pressure pulverized coal preparation system of adjustable size distribution | |
| CN202845334U (en) | Jet type powder removing machine for dry grading of fine coal before selection | |
| CN203508403U (en) | Coal settling fine-coal remover | |
| CN201045558Y (en) | Mobile clapboard type fluid bed | |
| CN207013298U (en) | It is a kind of from tandem air sorting machine for powder | |
| CN201543594U (en) | Obliquely-slotted powder grading device | |
| CN102000666B (en) | Air classifier matched with fluidized bed drying device | |
| CN204892149U (en) | Tower skirt formula dry powder material grader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130403 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |