CN202725501U - Fines removal all-in-one machine used for dry-method classification before steam coal preparation - Google Patents

Fines removal all-in-one machine used for dry-method classification before steam coal preparation Download PDF

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Publication number
CN202725501U
CN202725501U CN 201220369317 CN201220369317U CN202725501U CN 202725501 U CN202725501 U CN 202725501U CN 201220369317 CN201220369317 CN 201220369317 CN 201220369317 U CN201220369317 U CN 201220369317U CN 202725501 U CN202725501 U CN 202725501U
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wind
air
classification
ventilating duct
district
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CN 201220369317
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Chinese (zh)
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王超
朱金波
龚磊
闵凡飞
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Abstract

The utility model belongs to the technical field of fines removal classification before coal washing, and particularly relates to a fines removal all-in-one machine used for dry-method classification before steam coal preparation. The fines removal machine comprises a material dispersing area, a primary classification area and a secondary classification area, wherein the material dispersing area is used for dispersing collided materials under airflow shooting; the primary classification area is used for dividing the dispersed materials into primary fine particle materials and primary coarse particle materials through a 360-degree omni-circumferential wind and material distributing mechanism; and the secondary classification area is used for dividing the primary fine particle materials into secondary fine particle materials and secondary coarse particle materials through a wind power rotation driven classification mechanism, and the secondary fine particle materials and the secondary coarse particle materials are respectively discharged out of the secondary classification area to complete the final classification. The material classification process of the machine disclosed by the utility model comprises two times of dispersion and two times of classification, the classification efficiency is improved, the problem of sieve pore blockage is fundamentally solved, the partition size is regulated between 0mm and 13mm according to needs, the separation requirement of a full-size dry method is met, and coal used for power generation of a circulating fluidized bed furnace used for a pithead power plant is guaranteed.

Description

A kind of shedding all-in-one for dry classification before the thermal coal choosing
Technical field
The utility model belongs to the front shedding classification technique field of coal washing, is specifically related to a kind of shedding all-in-one for dry classification before the thermal 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.
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, 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 6mm with CFBB, therefore how to realize that partition size is from any regulation and control of 0~13mm, requiring and guarantee the Circulation fluidized-bed furnace coal for power generation with classification, the sorting of satisfying wholegrain level dry method, is a technical barrier that needs to be resolved hurrily.
Summary of the invention
The purpose of this utility model provides a kind of shedding all-in-one for dry classification before the thermal coal choosing, this powder remover can realize effectively that partition size is from as required arbitrarily regulation and control between 0~13mm, 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 shedding all-in-one for dry classification before the thermal coal choosing, and it comprises following part:
The material dispersion district is used for making material to penetrate lower each other dispersion after the collision effect rushing of air-flow, and the material after the dispersion enters the scalping district;
The scalping district, the scalping district comprises feed bin, be provided with exhaust outlet on the feed bin, be provided with 360 degree loopfuls in the feed bin to cloth wind material-feeding mechanism, material after the dispersion is divided into a fine granular materials and a coarse granule material through 360 degree loopfuls to cloth wind material-feeding mechanism, a described fine granular materials enters the secondary grading district to carry out further classification, and a described coarse granule material is discharged feed bin through the coarse granule drainage conduit;
The secondary grading district, be provided with Wind-driven rotating in the secondary grading district and drive classification mechanism, a described fine granular materials drives classification mechanism through Wind-driven rotating and is divided into secondary fine granular materials and secondary coarse granule material, and described secondary fine granular materials and secondary coarse granule material are discharged respectively Wind-driven rotating and driven classification mechanism to finish final classification.
The utility model can also be able to further realization by following technical measures:
Preferably, described material dispersion district comprises the high-pressure injection airduct one time, pan feeding member and dispersion member, the pipe shaft that the discharging opening of described pan feeding member is a skewed and described high-pressure injection airduct intersects, described dispersion member is arranged on high-pressure injection airduct and pan feeding member intersection, pipe shaft front side along the air-flow direction of advance, the inner chamber of described dispersion member is is convenient to that material collides each other so that material dispersion hemispherical, disperse the feeding mouth of member to be connected with a high-pressure injection airduct, the discharging opening of dispersion member passes feed bin and is set to towards 360 degree loopfuls to cloth wind material-feeding mechanism.
Preferably, described 360 degree loopfuls comprise the pneumatic jig that is arranged on upside to cloth wind material-feeding mechanism, the downside of pneumatic jig is provided with and is 360 degree loopfuls to the air-supply arrangement of cloth wind, be evenly equipped with the sieve aperture of being convenient to go out from the wind that the air-supply arrangement place sends here on the described pneumatic jig, and the upper surface of pneumatic jig is set to be convenient to material landing skewed on pneumatic jig; The downside of described pneumatic jig is provided with the stage isolation groove, the upside of stage isolation groove is the adjustable uncovered shape of size, and the uncovered edge of stage isolation groove stretches out the outside in the lower peripheral edge of pneumatic jig, the lower side outlet of stage isolation groove is connected with the coarse granule drainage conduit, be provided with the passage that fine granular materials of confession passes through between the cell wall of described stage isolation groove and the inwall of feed bin, the lower side outlet of described feed bin is connected by the feeding mouth of fine grained drainage conduit with the secondary grading district.
Further, described pneumatic jig is coniform, and pneumatic jig by horizontal grating and vertically grating enclose and form; Described vertical grating is radial cloth and is made as a plurality of under the top of coniform pneumatic jig is oblique, described horizontal grating in the form of a ring, and horizontal grating longitudinally grating is set to a plurality of from top to bottom, it is smooth circular-arc that the upper surface of described horizontal grating is, and laterally the incline direction of the upper surface of the incline direction of grating upper surface and pneumatic jig matches.
Further, described air-supply arrangement comprises the air feed post of vertical shape, and the revolution center line of the axis of described air feed post and pneumatic jig coincides; The lower end of described air feed post is that air intake is connected with supplying airduct, and the upper end of air feed post links to each other with the bottom surface of pneumatic jig, and the upper segment column that is positioned at the pneumatic jig masked areas of air feed post is provided with air supply hole with it; Described air-supply arrangement also comprise match with the air feed post so that loopful to the ventilating duct of cloth wind, one end and the air feed post of described ventilating duct are connected, and the air inlet of ventilating duct is connected with described air supply hole, and the end away from air supply hole of ventilating duct also is that the air outlet of ventilating duct is set to the cloth wind gap that consists of between horizontal grating.
Further, the aperture of described air supply hole is identical, and along hoop be arranged in air feed post week side and the air supply hole that is on the same level direction jointly consist of hoop air supply hole group, described air supply hole group uniformly-spaced is arranged on the shaft of air feed post from top to bottom; Described ventilating duct is corresponding one by one with air supply hole, and described ventilating duct is the fan shape that is surrounded by dividing plate, and the air inlet place of ventilating duct is provided with and prevents the gasket seal that leaks out, and the end limit at the air outlet place of ventilating duct is resisted against on the bottom surface of described pneumatic jig; The base spacer of ventilating duct that is in upside is all identical with the roof spacer size and shape of the adjacent ventilating duct that is in downside, and this base spacer therewith roof spacer be connected with each other.
Preferably, the air inlet place of described ventilating duct is provided with the wind-guiding screen of being convenient to realize even distributing wind in the ventilating duct.
Further, described wind-guiding screen is flat tabular, and an end of the close described air supply hole of wind-guiding screen to be a side be that plane, opposite side are the chock shape on inclined-plane, the inclined-plane side of the chock shape end of described wind-guiding screen is set to the barrel medial surface towards ventilating duct; The plate face of described wind-guiding screen is parallel to each other, and the end away from the air inlet of ventilating duct of wind-guiding screen is mutually concordant; To increasing gradually between the barrel medial surface of ventilating duct, and the length of wind-guiding screen reduces between the barrel medial surface of ventilating duct from the air inlet middle part of ventilating duct the distance between plates of two adjacent air guiding grid plates gradually from the air inlet of ventilating duct middle part.
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 feeding mouth that is connected with the fine grained drainage conduit 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 classification storehouse, and classification is provided with blanking barrel in the storehouse, and 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 open topped area of described blanking barrel is less than the aperture area of stock grading district discharge end; The inside of described blanking barrel consists of the fine granular materials feeding zone that passes through for the secondary fine granular materials, consists of the coarse granule material feeding zone that passes through for secondary coarse granule material between the inwall in the outer wall of blanking barrel and 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 utlity model has following beneficial effect:
1), the utility model at first by the dispersion member in the material dispersion district so that the wet stock agglomerate obtain comparatively fully once disperseing, then also be twice dispersing by using cone shape pneumatic jig to make material obtain further Uniform Dispersion, material obtains scalping in by the pneumatic jig twice dispersing, drive classification mechanism by Wind-driven rotating at last material is carried out secondary grading; And the utility model makes in discharges material in the classification storehouse and keeps negative pressure, has guaranteed that material can be discharged smoothly when requiring partition size larger.
From the above, stock grading process of the present utility model comprises twice dispersion and twice classification, when having improved classification efficiency, fundamentally solved the sieve pore blockade problem, realized that partition size is from as required any regulation and control between 0~13mm, classification, the sorting of having satisfied wholegrain level dry method require and have guaranteed to have promoted to become defeated coal the process that is the strategic change of transmission of electricity by the coal for power generation of near coal-mine power plant usefulness Circulation fluidized-bed furnace.
2), the pneumatic jig in the utility model is coniform, it also is the coniform compass screen surface that the utility model has adopted hoop, single-point cloth and linear distributing mode that this cone shape compass screen surface distributing mode generally adopts compared with traditional fluid bed, can enlarge markedly the cloth area of fluid bed, thereby help to realize uniform distribution; Simultaneously the utility model is provided with at the downside of pneumatic jig and is 360 degree loopfuls to the air-supply arrangement of cloth wind, has realized the hoop even distributing wind.Therefore the utility model so that thickness of feed layer and in machine translational speed can regulate as required, thereby significantly improved production capacity, and improved classification, drying, cooling effectiveness.
3), in the scalping district, material at first drops on the upper surface of pneumatic jig from upside, because the upper surface of pneumatic jig is skewed, therefore material drops down along the upper surface of pneumatic jig, material is subject to the wind action that air-supply arrangement sends and bumps when dropping down, therefore in whole cloth process, because fall, the synergy of collision and gas shock, so that the wet stock clustered particles can in time obtain twice dispersing, thereby be that next step drying, graded operation is ready.
4), because the wind speed and direction of the hoop air-flow wind of pneumatic jig is adjustable, so that material just can disperse and fluidisation equably at the friction parts with under than the situation of low gas velocity, thereby the energy consumption of greatly reducing, simultaneously this cloth wind, material-feeding mechanism are also less to the surface damage of material, therefore the utility model can be used for the drying of fragile material, does not also affect working effect when material particles is irregular.
5), the utility model can improve partly to enter to wash wet coal preparation the best and enter to wash limit, improves the lump coal cleaning percent, optimizes product structure, and simplifies simultaneously black water and processes the decorum, reduces slime content, realizes that the Coal Preparation Plant maximization of economic benefit is significant.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that 360 degree loopfuls are to the structural representation of cloth wind material-feeding mechanism.
Fig. 3 is the structural representation of pneumatic jig.
Fig. 4 is the structural representation of air feed post.
Fig. 5 is the structural representation that air feed post and ventilating duct match.
Fig. 6,7 is the structural representation of ventilating duct.
Fig. 8 is the arrangement states schematic diagram of wind-guiding sieve plate.
Fig. 9 is the structural representation of wind-guiding sieve plate.
Figure 10 is the structural representation that Wind-driven rotating drives classification mechanism.
The implication of mark is as follows among the figure:
10-pneumatic jig 11-horizontal grating 12-vertical grating 13-cloth wind gap
20-air feed post, 21-air supply hole, 30-ventilating duct, 31-dividing plate
311-roof spacer, 312-base spacer 32-end limit 33-wind-guiding screen
34-air inlet, 40-material dispersion district, 332-plane, 331-inclined-plane
41-high-pressure injection airduct 42-pan feeding member 43-dispersion member
50-scalping district, 51-feed bin, 52-exhaust outlet, 53-stage isolation groove
54-coarse granule drainage conduit, 55-adjustable hinge 56-confession airduct
57-fine grained drainage conduit, 60-secondary grading district, 61-secondary high-pressure sprays airduct
62-bend pipe buffer component, 63-wind deflector, 64-pore
65-stock grading district discharge end 66-blanking barrel 67-fine granular materials feeding zone
68-coarse granule material feeding zone, 69-classification storehouse
The specific embodiment
As shown in Figure 1, a kind of shedding all-in-one for dry classification before the thermal coal choosing, it comprises following part:
Material dispersion district 40 is used for making material to penetrate lower each other dispersion after the collision effect rushing of air-flow, and be the once dispersion of material this moment, and the material after the dispersion enters the scalping district;
Scalping district 50, the scalping district comprises feed bin 51, be provided with exhaust outlet 52 on the feed bin 51, be provided with 360 degree loopfuls in the feed bin 51 to cloth wind material-feeding mechanism, material after once disperseing obtains twice dispersing through 360 degree loopfuls after cloth wind material-feeding mechanism collides landing and gas shock, material behind twice dispersing is divided into a fine granular materials and a coarse granule material, a described fine granular materials enters the secondary grading district to carry out further classification, and a described coarse granule material is discharged feed bin 51 through coarse granule drainage conduit 54; From the above, described scalping district 50 also is the twice dispersing district of material;
Secondary grading district 60, be provided with Wind-driven rotating in the secondary grading district and drive classification mechanism, a described fine granular materials drives classification mechanism through Wind-driven rotating and is divided into secondary fine granular materials and secondary coarse granule material, and described secondary fine granular materials and secondary coarse granule material are discharged respectively Wind-driven rotating and driven classification mechanism to finish final classification.
Preferably, as shown in Figure 1, described material dispersion district 40 comprises high-pressure injection airduct 41 one time, pan feeding member 42 and dispersion member 43, the pipe shaft that the discharging opening of described pan feeding member 42 is a skewed and described high-pressure injection airduct 41 intersects, described dispersion member 43 is arranged on high-pressure injection airduct 41 and pan feeding member 42 intersections, pipe shaft front side along the air-flow direction of advance, the inner chamber of described dispersion member 43 is is convenient to material collision so that material dispersion hemispherical, disperse the feeding mouth of member 43 to be connected with a high-pressure injection airduct 41, the discharging opening of dispersion member 43 passes feed bin 51 and is set to towards 360 degree loopfuls to cloth wind material-feeding mechanism.
Preferably, as shown in Figure 2, described 360 degree loopfuls comprise the pneumatic jig 10 that is arranged on upside to cloth wind material-feeding mechanism, the downside of pneumatic jig 10 is provided with and is 360 degree loopfuls to the air-supply arrangement of cloth wind, be evenly equipped with the sieve aperture of being convenient to go out from the wind that the air-supply arrangement place sends here on the described pneumatic jig 10, and the upper surface of pneumatic jig 10 is set to be convenient to material landing skewed on pneumatic jig; The positive downside of described pneumatic jig 10 is provided with stage isolation groove 53, the upside of stage isolation groove 53 is the adjustable uncovered shape of size, and the uncovered edge of stage isolation groove 53 stretches out the outside in the lower peripheral edge of pneumatic jig 10, the lower side outlet of stage isolation groove 53 is connected with coarse granule drainage conduit 54, be provided with the passage that fine granular materials of confession passes through between the inwall of the cell wall of described stage isolation groove 53 and feed bin 51, the lower side outlet of described feed bin 51 is connected by the feeding mouth of fine grained drainage conduit 57 with secondary grading district 60.
The upside of stage isolation groove 53 is the adjustable uncovered shape of size, for the ease of material is carried out classification, as when the upside of stage isolation groove 53 uncovered hour, only have the larger coarse granule material of particle diameter can fall into stage isolation groove 53 this moment, and most of material then falls into passage between the inwall of the cell wall of stage isolation groove 53 and feed bin 51 as fine granular materials.The uncovered opening that also can make fixed size of upside of certain stage isolation groove 53.
Preferably, described pneumatic jig 10 is coniform, and pneumatic jig 10 by horizontal grating 11 and vertically grating 12 enclose and form; Described vertical grating 12 under the top of coniform pneumatic jig 10 is oblique, be radial cloth be made as a plurality of, described horizontal grating 11 in the form of a ring, and laterally grating 11 longitudinally grating 12 arrange from top to bottom.
Further, it is smooth circular-arc that the upper surface of described horizontal grating 11 is, and laterally the incline direction of the upper surface of the incline direction of grating 11 upper surfaces and pneumatic jig 10 matches.
Also namely as shown in Figure 3, described pneumatic jig 10 is the conical compass screen surfaces that surrounded by horizontal grating 11 and vertical grating 12, consists of cloth wind gap 13 between the two adjacent horizontal gratings 11.The cross section of described horizontal grating 11 is smooth fan-shaped cambered surface, described fan-shaped one side contacts with vertical grating 12, fan-shaped another side extends to the outside of pneumatic jig 10, thereby so that laterally the fan-shaped cambered surface of grating 11 is along the oblique lower bending of compass screen surface, this frame mode is conducive to the wet stock agglomerate when avoiding fine to stop up collision disperses.
As shown in Figure 2, the drift angle angle beta of described coniform pneumatic jig 10 is chosen between 60 °~120 ° according to screen length, raw meal particle size demand and wet stock agglomerate content.
Preferably, shown in Fig. 2,4,5, described air-supply arrangement comprises the air feed post 20 of vertical shape, and the revolution center line of the axis of described air feed post 20 and pneumatic jig 10 coincides; The lower end of described air feed post 20 is air intake, and the upper end of air feed post 20 links to each other with the bottom surface of pneumatic jig 10, and the upper segment column that is positioned at pneumatic jig 10 masked areas of air feed post 20 is provided with air supply hole 21 with it.
The aperture of described air supply hole 21 is identical, and is arranged in air feed post 20 all sides and is in that air supply hole 21 on the same level direction is common to consist of hoop air supply hole groups along hoop, and described air supply hole group uniformly-spaced is arranged on the shaft of air feed post 20 from top to bottom.
Shown in Fig. 4,5, the air supply hole 21 of described air feed post 20 is spaced six 360 ° of directions of level are first-class, and the quantity of air supply hole 21 can increase or reduce as required, and described six air supply holes 21 consist of a hoop air supply hole group; Hoop air supply hole group is vertically uniformly-spaced neatly arranged five groups on the shaft of air feed post 20, and the quantity of described hoop air feed post group can increase as required, thereby improves the uniformity of cloth wind.
Further, described air-supply arrangement also comprise match with air feed post 20 so that loopful to the ventilating duct 30 of cloth wind, one end and the air feed post 20 of described ventilating duct 30 are connected, and the air inlet 34 of ventilating duct 30 is connected with described air supply hole 21, and the end away from air supply hole 21 of ventilating duct 30 also is the cloth wind gap 13 that the air outlet of ventilating duct 30 is set to formation between horizontal grating 11.
Preferably, described ventilating duct 30 is corresponding one by one with air supply hole 21, described ventilating duct 30 is the fan shape that is surrounded by dividing plate 31, and the air inlet place of ventilating duct 30 is provided with and prevents the gasket seal that leaks out, and the end limit 32 at the air outlet place of ventilating duct 30 is resisted against on the bottom surface of described pneumatic jig 10; The base spacer of ventilating duct that is in upside is all identical with the roof spacer size and shape of the adjacent ventilating duct that is in downside, and this base spacer therewith roof spacer be connected with each other.
As shown in Figure 7, the upper and lower surface of described ventilating duct 30 is the identical sallop screen of angle, and ventilating duct 30 is bolted on the air feed post 20, and overlapping for air port 21 on the air inlet 34 of ventilating duct 30 and the air feed post 20.
As shown in Figure 7, the specification that is in the ventilating duct 30 on the same horizontal level is identical, and the base spacer 312 of ventilating duct 30 on radical length greater than roof spacer 311, thereby be convenient to realize close contact with skewed compass screen surface.
As preferred version of the present utility model, the air inlet place of described ventilating duct 30 is provided with the wind-guiding screen 33 of being convenient to realize ventilating duct 30 interior even distributing winds.
Further, as shown in Figure 9, described wind-guiding screen 33 is flat tabular, and an end of the close described air supply hole 21 of wind-guiding screen 33 to be a side be that plane, opposite side are the chock shape on inclined-plane, the inclined-plane side of the chock shape end of described wind-guiding screen 33 is set to the barrel medial surface towards ventilating duct 30.
Further, the plate face of described wind-guiding screen 33 is parallel to each other, and the end away from the air inlet of ventilating duct 30 of wind-guiding screen is mutually concordant; To increasing gradually between the barrel medial surface of ventilating duct 30, and the length of wind-guiding screen reduces between the barrel medial surface of ventilating duct 30 from the air inlet middle part of ventilating duct 30 distance between plates of two adjacent air guiding grid plates gradually from the air inlet of ventilating duct 30 middle part.
As shown in Figure 8, described wind-guiding screen 33 places in the ventilating duct 30, the side view of each wind-guiding screen 33 is similar, but the thickness of wind-guiding screen 33 and length are different, and the upper surface that places ventilating duct air inlet 34 1 sides of wind-guiding screen 33 and lower surface are at an angle ramped shaped or chock shape.Because the central speed of the classification wind that is entered by ventilating duct air inlet 34 is large, and the peripheral direction wind speed is little, so the spacing of each wind-guiding screen 33 increases gradually by the middle mind-set both sides of classification wind, thereby classification wind is carried out even distributing wind by the shape of ventilating duct 30.
As shown in Figure 8, the thickness of each wind-guiding screen 33 diminishes between the barrel medial surface of ventilating duct 30 gradually from the air inlet middle part of ventilating duct 30.
Be provided with the stator of strap bolt around described ventilating duct air inlet 34 and air supply hole 21 contact jaws, ventilating duct 30 is connected and fixed by bolt and air feed post 20, adds gasket seal in case leak-stopping wind at stator and air feed post 20 contacted places.
In scalping district 50, material falls from the upside of coniform pneumatic jig 10 because the upper surface of pneumatic jig 10 is skewed, so the wet stock of agglomerate along the upper surface of pneumatic jig 10 drop down and constantly with the compass screen surface collision, with the even distribution of realization material; Simultaneously since 360 degree loopfuls can realize to the comprehensive of pneumatic jig 10 and without the air feed at dead angle to the air-supply arrangement of cloth wind, so material is subject to the impact of the air-flow that air-supply arrangement sends and obtains further effectively disperseing when dropping down; Setting by the cloth wind gap 13 between the adjacent transverse grating 11, effectively avoided the obstruction of thin material, the size of the total wind supply quantity by regulating 20 inputs of air feed post is to regulate the wind-force size, can effectively solve the bed uneven phenomenon that occurs in the classification process, realize even and efficient cloth wind, cloth, thereby realized the high-effective classifying to material.
Shown in Fig. 1,10, the Wind-driven rotating in the described secondary grading district 60 drives stock grading district and the feeding zone that classification mechanism comprises closed; Described stock grading district comprises that secondary high-pressure sprays airduct 61, bend pipe buffer component 62 and wind deflector 63, be provided with the feeding mouth that is connected with fine grained drainage conduit 57 on the pipe shaft of described secondary high-pressure injection airduct 61, and secondary high-pressure sprays airduct 61 and is connected with bend pipe buffer component 62, the discharging opening of bend pipe buffer component 62 is towards wind deflector 63 1 side settings, described wind deflector 63 is smooth curved arc shape and arranges a plurality of, the zone that a plurality of wind deflectors 63 surround consists of material graded region discharge end 65, consist of the air-guiding aisle that leads to stock grading district discharge end 65 between the adjacent wind deflector, and the top of the air intake of described air-guiding aisle is provided with pore 64; Described stock grading district discharge end 65 is connected with feeding zone.
Further, as shown in Figure 1, described feeding zone comprises classification storehouse 69, be provided with blanking barrel 66 in the classification storehouse 69, the top of blanking barrel 66 is uncovered shape, and the open topped of blanking barrel 66 be arranged on stock grading district discharge end 65 under, the little edge of open topped area of described blanking barrel 66 is positioned at the inboard of the edge of opening of stock grading district discharge end 65; The inside of described blanking barrel 66 consists of the fine granular materials feeding zone 67 that passes through for the secondary fine granular materials, consists of the coarse granule material feeding zone 68 that passes through for secondary coarse granule material between the inwall in the outer wall of blanking barrel 66 and classification storehouse 69; The discharging opening place of described blanking barrel 66 is provided with air exhauster.
Below in conjunction with Fig. 1 the course of work of the present utility model is described further:
The utility model comprises material dispersion district 40, scalping district 50 and secondary grading district 60.
Described material dispersion district 40 is positioned at the top of powder remover, and it comprises high-pressure injection airduct 41, pan feeding member 42 and dispersion member 43 one time, and material is once disperseed in material dispersion district 40.
Scalping district 50 is between material dispersion district 40 and secondary grading district 60, and the feed bin 51 that it comprises with exhaust outlet 52 is provided with pneumatic jig 10,360 and spends loopfuls to air-supply arrangement and the stage isolation groove 53 of cloth wind in the feed bin 51; Cone shape pneumatic jig 10 is by horizontal grating 11 and the vertical tapered compass screen surface that surrounds of grating 12, consists of cloth wind gap 13 between the two adjacent horizontal gratings 11, described pneumatic jig 10 place air-supply arrangement above; 360 degree loopfuls then are to be made of air feed post 20 and ventilating duct 30 to the air-supply arrangement of cloth wind.The epimere of air feed post 20 stretches into the bottom of cone shape pneumatic jig 10, and the upper segment column of air feed post 10 evenly be placed with it equal and opposite in direction and uniformly-spaced arrange from top to bottom air supply hole 21, the utility model adopts six air supply holes 21 in each horizontal direction, and in the vertical direction air supply hole 21 is uniformly-spaced neatly arranged.The upper and lower surface of ventilating duct 30 is the identical sallop screen of angle, and ventilating duct 30 is bolted on the air feed post 20, and air supply hole 21 coincides on the air inlet 34 of ventilating duct 30 and the air feed post 20; The air inlet place of described ventilating duct 30 is provided with the wind-guiding screen 33 of being convenient to realize ventilating duct 30 interior even distributing winds; Stage isolation groove 53 is located at the downside of pneumatic jig 10, and the area of the open topped of stage isolation groove 53 is greater than the base area of pneumatic jig; The bottom of stage isolation groove 53 is connected by adjustable hinge 55 with coarse granule drainage conduit 54, and feed bin 51 then links to each other with the feeding mouth that the secondary high-pressure in secondary grading district 60 sprays airduct 61 by the fine grained drainage conduit 57 of its bottom.
Secondary grading district 60 is positioned at the downside in scalping district 50, secondary grading district 60 comprises the stock grading district that is positioned at upside and is positioned at the feeding zone of downside, described stock grading district comprises that secondary high-pressure sprays airduct 61, bend pipe buffer component 62 and wind deflector 63, and the central region that a plurality of wind deflectors 63 surround consists of material graded region discharge end 65; Described feeding zone comprises classification storehouse 69, is provided with blanking barrel 66 in the classification storehouse 69, and the uncovered outlet with stock grading district discharge end 65 of the upside of blanking barrel 66 is connected.
Concrete classification shedding process is as follows:
As shown in Figure 1, material also is that feed chute enters high-pressure injection airduct 41 one time by pan feeding member 42, rushing under the effect of penetrating of high-pressure blast, material enters into the hemispherical inner chamber that disperses member 43, material collides once to disperse with the wall of the hemispherical inner chamber that disperses member 43, owing to the particulate agglomerate that adhesion forms is fully disperseed in this process.
Material vertical drop after the dispersion is to the top of coniform pneumatic jig 10, material is along being able to Uniform Dispersion to finish twice dispersing in the dropping process of coniform pneumatic jig 10 compass screen surfaces, ventilating duct 20 providers of coniform pneumatic jig 10 downsides are to the oblique lower and adjustable classification wind of intensity simultaneously, material be subject to seeing through cloth wind gap 13 also be sieve aperture classification wind flushing action and separated, the classification wind of dust granules is carried in time eliminating of the air exhauster that link to each other with exhaust outlet 52 this moment.Coal ash content in the separating particles is low, density is close, large or fine granule wherein is according to the difference of its weight and the distance of the pneumatic jig compass screen surface that blown off is not identical yet, and the coarse granule material that weight is large falls in the cell body of stage isolation groove 53, and discharges through coarse granule drainage conduit 54; The fine granular materials that weight is lighter then falls into the passage of the inwall formation of stage isolation groove 53 and feed bin 51, and continues to fall to the feeding mouth that secondary high-pressure sprays airduct 61 through fine grained drainage conduit 57, thereby finishes scalping.
The material that enters secondary high-pressure injection airduct 61 enters bend pipe buffer component 62 rushing of secondary high-pressure wind under the effect of penetrating, bend pipe buffer component 62 is S-type, material is through entering the air-guiding aisle that wind deflector 63 consists of along the tangential direction of wind deflector 63 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 66 through stock grading district discharge end 65 under the suction function of secondary fine granular materials in blanking barrel 66, and be discharged from rear collection; Secondary coarse granule material is discharged from after then falling into the coarse granule material feeding zone 68 that consists of between the inwall in the outer wall of blanking barrel 66 and classification storehouse 69, thereby finishes secondary grading.

Claims (10)

1. one kind is used for the shedding all-in-one that thermal coal selects front dry classification, it is characterized in that comprising following part:
Material dispersion district (40) is used for making material to penetrate lower each other dispersion after the collision effect rushing of air-flow, and the material after the dispersion enters the scalping district;
Scalping district (50), the scalping district comprises feed bin (51), be provided with exhaust outlet (52) on the feed bin (51), be provided with 360 degree loopfuls in the feed bin (51) to cloth wind material-feeding mechanism, material after the dispersion is divided into a fine granular materials and a coarse granule material through 360 degree loopfuls to cloth wind material-feeding mechanism, a described fine granular materials enters the secondary grading district to carry out further classification, and a described coarse granule material is discharged feed bin (51) through coarse granule drainage conduit (54);
Secondary grading district (60), be provided with Wind-driven rotating in the secondary grading district and drive classification mechanism, a described fine granular materials drives classification mechanism through Wind-driven rotating and is divided into secondary fine granular materials and secondary coarse granule material, and described secondary fine granular materials and secondary coarse granule material are discharged respectively Wind-driven rotating and driven classification mechanism to finish final classification.
2. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 1, it is characterized in that: described material dispersion district (40) comprises a high-pressure injection airduct (41), pan feeding member (42) and dispersion member (43), the pipe shaft that the discharging opening of described pan feeding member (42) is a skewed and described high-pressure injection airduct (41) intersects, described dispersion member (43) is arranged on a high-pressure injection airduct (41) and pan feeding member (42) intersection, pipe shaft front side along the air-flow direction of advance, the inner chamber of described dispersion member (43) is is convenient to that material collides each other so that material dispersion hemispherical, disperse the feeding mouth of member (43) to be connected with a high-pressure injection airduct (41), the discharging opening of dispersion member (43) passes feed bin (51) and is set to towards 360 degree loopfuls to cloth wind material-feeding mechanism.
3. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 2, it is characterized in that: described 360 degree loopfuls comprise the pneumatic jig (10) that is arranged on upside to cloth wind material-feeding mechanism, the downside of pneumatic jig (10) is provided with and is 360 degree loopfuls to the air-supply arrangement of cloth wind, be evenly equipped with the sieve aperture of being convenient to go out from the wind that the air-supply arrangement place sends here on the described pneumatic jig (10), and the upper surface of pneumatic jig (10) is set to be convenient to material landing skewed on pneumatic jig; The positive downside of described pneumatic jig (10) is provided with stage isolation groove (53), the upside of stage isolation groove (53) is the adjustable uncovered shape of size, and the uncovered edge of stage isolation groove (53) stretches out the outside in the lower peripheral edge of pneumatic jig (10), the lower side outlet of stage isolation groove (53) is connected with coarse granule drainage conduit (54), be provided with the passage that fine granular materials of confession passes through between the inwall of the cell wall of described stage isolation groove (53) and feed bin (51), the lower side outlet of described feed bin (51) is connected by the feeding mouth of fine grained drainage conduit (57) with secondary grading district (60).
4. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 3, it is characterized in that: described pneumatic jig (10) is coniform, and pneumatic jig (10) is enclosed by horizontal grating (11) and vertical grating (12) and forms; Described vertical grating (12) is radial cloth and is made as a plurality of under the top of coniform pneumatic jig (10) is oblique, described horizontal grating (11) in the form of a ring, and horizontal grating (11) longitudinally grating (12) is set to a plurality of from top to bottom, it is smooth circular-arc that the upper surface of described horizontal grating (11) is, and laterally the incline direction of the upper surface of the incline direction of grating (11) upper surface and pneumatic jig (10) matches.
5. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 4, it is characterized in that: described air-supply arrangement comprises the air feed post (20) of vertical shape, the revolution center line of the axis of described air feed post (20) and pneumatic jig (10) coincides; The lower end of described air feed post (20) is that air intake is connected with supplying airduct (56), the upper end of air feed post (20) links to each other with the bottom surface of pneumatic jig (10), and the upper segment column that is positioned at pneumatic jig (10) masked areas of air feed post (20) is provided with air supply hole (21) with it; Described air-supply arrangement also comprise match with air feed post (20) so that loopful to the ventilating duct (30) of cloth wind, one end of described ventilating duct (30) and air feed post (20) are connected, and the air inlet of ventilating duct (30) is connected with described air supply hole (21), and the end away from air supply hole (21) of ventilating duct (30) also is the cloth wind gap that the air outlet of ventilating duct (30) is set to formation between horizontal grating (11).
6. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 5, it is characterized in that: the aperture of described air supply hole (21) is identical, and be arranged in all sides of air feed post (20) and the air supply hole (21) that is on the same level direction consists of hoop air supply hole group jointly along hoop, described air supply hole group uniformly-spaced is arranged on the shaft of air feed post (20) from top to bottom; Described ventilating duct (30) is corresponding one by one with air supply hole (21), described ventilating duct (30) is the fan shape that is surrounded by dividing plate (31), the air inlet place of ventilating duct (30) is provided with and prevents the gasket seal that leaks out, and the end limit (32) at the air outlet place of ventilating duct (30) is resisted against on the bottom surface of described pneumatic jig (10); The base spacer of ventilating duct that is in upside is all identical with the roof spacer size and shape of the adjacent ventilating duct that is in downside, and this base spacer therewith roof spacer be connected with each other.
7. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 5, it is characterized in that: the air inlet place of described ventilating duct (30) is provided with the wind-guiding screen (33) of being convenient to realize even distributing wind in the ventilating duct.
8. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 7, it is characterized in that: described wind-guiding screen (33) is flat tabular, and it is that plane, opposite side are the chock shape on inclined-plane that an end of the close described air supply hole (21) of wind-guiding screen (33) is a side, and the inclined-plane side of the chock shape end of described wind-guiding screen (33) is set to the barrel medial surface towards ventilating duct (30); The plate face of described wind-guiding screen (33) is parallel to each other, and an end of the air inlet away from ventilating duct (30) of wind-guiding screen (33) (34) is mutually concordant; To increasing gradually between the barrel medial surface of ventilating duct (30), and the length of wind-guiding screen (33) reduces between the barrel medial surface of ventilating duct (30) from the air inlet middle part of ventilating duct (30) distance between plates of two adjacent air guiding grid plates gradually from the air inlet of ventilating duct (30) middle part.
9. each described shedding all-in-one for dry classification before the thermal coal choosing according to claim 3~8, it is characterized in that: the Wind-driven rotating in the described secondary grading district (60) drives stock grading district and the feeding zone that classification mechanism comprises closed; Described stock grading district comprises that secondary high-pressure sprays airduct (61), bend pipe buffer component (62) and wind deflector (63), be provided with the feeding mouth that is connected with fine grained drainage conduit (57) on the pipe shaft of described secondary high-pressure injection airduct (61), and secondary high-pressure sprays airduct (61) and is connected with bend pipe buffer component (62), the discharging opening of bend pipe buffer component (62) is towards wind deflector (63) one side settings, described wind deflector (63) is smooth curved arc shape and arranges a plurality of, the zone that a plurality of wind deflectors (63) surround consists of material graded region discharge end (65), consist of the air-guiding aisle that leads to stock grading district discharge end (65) between the adjacent wind deflector, and the top of the air intake of described air-guiding aisle is provided with pore (64); Described stock grading district discharge end (65) is connected with feeding zone.
10. the shedding all-in-one for dry classification before the thermal coal choosing according to claim 9, it is characterized in that: described feeding zone comprises classification storehouse (69), be provided with blanking barrel (66) in the classification storehouse (69), the top of blanking barrel (66) is uncovered shape, and the open topped of blanking barrel (66) be arranged on stock grading district discharge end (65) under, the little edge of open topped area of described blanking barrel (66) is positioned at the inboard of the edge of opening of stock grading district discharge end (65); The inside of described blanking barrel (66) consists of the fine granular materials feeding zone (67) that passes through for the secondary fine granular materials, consists of the coarse granule material feeding zone (68) that passes through for secondary coarse granule material between the inwall of the outer wall of blanking barrel (66) and classification storehouse (69); The discharging opening place of described blanking barrel (66) is provided with and makes blanking barrel (66) inside be the air exhauster of negative pressure region.
CN 201220369317 2012-07-27 2012-07-27 Fines removal all-in-one machine used for dry-method classification before steam coal preparation Withdrawn - After Issue CN202725501U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102784757A (en) * 2012-07-27 2012-11-21 安徽理工大学 Efficient airflow classification fine-coal remover for power coal before selecting
CN104259104A (en) * 2014-09-24 2015-01-07 王雪 Totally-closed continuous airflow power coal separator with vibrating barrel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102784757A (en) * 2012-07-27 2012-11-21 安徽理工大学 Efficient airflow classification fine-coal remover for power coal before selecting
CN102784757B (en) * 2012-07-27 2014-05-07 安徽理工大学 Efficient airflow classification fine-coal remover for power coal before selecting
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

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