CN202845334U - Jet type powder removing machine for dry grading of fine coal before selection - Google Patents
Jet type powder removing machine for dry grading of fine coal before selection Download PDFInfo
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- CN202845334U CN202845334U CN 201220580237 CN201220580237U CN202845334U CN 202845334 U CN202845334 U CN 202845334U CN 201220580237 CN201220580237 CN 201220580237 CN 201220580237 U CN201220580237 U CN 201220580237U CN 202845334 U CN202845334 U CN 202845334U
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Abstract
The utility model belongs to the technical field of powder removing and grading before washing and selection of coal, in particular to a jet type powder removing machine for dry grading of fine coal before selection. The jet type powder removing machine for the dry grading of the fine coal before the selection comprises a primary grading zone by adopting a manner of cross airflow jet grading and a secondary grading zone by adopting a manner of tangent airflow jet rotation grading. According to the jet type powder removing machine for the dry grading of the fine coal before the selection, materials are firstly enabled to bear a combined effect of horizontal jet flow and longitudinal jet flow in the process of descent and are reinforced and graded under the effect of the cross airflow, transition section materials after a primary grading enter the secondary grading zone to be secondarily graded, and downward negative pressure is introduced into the secondary grading zone so that smooth discharge of the materials can be ensured. The jet type powder removing machine for the dry grading of the fine coal before the selection fundamentally solves the problem of sieve clogging, control and regulation can be achieved in spite of the direction and the size of the airflow and the size and the position of collection and discharge ports of the materials, a free regulation of grading granularity from 0-13 millimeters according to demand can be achieved, namely, screening with a granularity level of 6 millimeters is achieved, 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 injecting type 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.
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 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 injecting type 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 injecting type powder remover for dry classification before the Bed for Fine Coal choosing, and it comprises following part:
The scalping district, the scalping district comprises the first classification storehouse that is arranged on the support, be provided with feeder trough, dedusting mouth and crosscurrent on the first classification storehouse and spray classification mechanism, described feeder trough and dedusting mouth divide the both sides that are located at the first classification storehouse, the downside in the first classification storehouse is provided with the first thick discharge of materials pipe, changeover portion discharge of materials pipe and the first thin discharge of materials pipe, and the collection floss hole of the described first thick discharge of materials pipe, changeover portion discharge of materials pipe and the first thin discharge of materials pipe all arranges up so that the material after the collection scalping; The discharge gate of the described first thick discharge of materials pipe and the first thin discharge of materials pipe all stretches out in the outside in the first classification storehouse, and the discharge gate of described changeover portion discharge of materials pipe is connected with the charging aperture in secondary grading district;
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 changeover portion 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 crosscurrent sprays classification mechanism and comprises the horizontal gas flow playpipe that is arranged on the first classification storehouse one side and the bottom blowing air current playpipe that is arranged on the first classification storehouse upside, and described feeder trough is connected with the horizontal gas flow playpipe; The described first thick discharge of materials pipe, changeover portion discharge of materials pipe and the first thin discharge of materials pipe are from setting gradually away from horizontal gas flow playpipe one side near horizontal gas flow playpipe one side direction.
Further, the collection floss hole of the described first thick discharge of materials pipe, changeover portion discharge of materials pipe and the first thin discharge of materials pipe all is the front side that laterally is laid in horizontal gas flow playpipe ejection air-flow.
Preferably, the air outlet place of described horizontal gas flow playpipe is provided with and is convenient to air-flow and the equally distributed air distributor of material; The air outlet of bottom blowing air current playpipe laterally is laid in the front side of horizontal gas flow playpipe ejection air-flow.
Further, described bottom blowing air current playpipe is disposed with a plurality of along the direction of advance of horizontal gas flow playpipe ejection air-flow.
Further, described bottom blowing air current playpipe and the first classification storehouse are for being flexibly connected; Perhaps the mouth of pipe of bottom blowing air current playpipe is adjustable towards angle.
As preferred version of the present utility model, be provided with dividing plate between the collection floss hole of the collection floss hole of the collection floss hole of the described first thick discharge of materials pipe and changeover portion discharge of materials pipe, the collection floss hole of changeover portion discharge of materials pipe and the first thin discharge of materials pipe.
Further, described dividing plate and the first classification storehouse are for being flexibly connected.
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 changeover portion 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 crosscurrent injection hierarchical approaches, employing tangent line jet-impingement rotation hierarchical approaches in the secondary grading district in the scalping district.
In the scalping district, material in the decline process, be subject to being subject in the horizontal high pressure jet stream effect from above vertical injection stream effect, under the effect of cross-current, strengthened grading, realized the effective separation of thin material and thick material.
The changeover portion discharge of materials pipe of the first classification storehouse downside is introduced the secondary grading district with the changeover portion material, the changeover portion material carries out secondary grading by the rotation of tangent line jet-impingement and row is thick, 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, and the size of the airflow direction in the utility model, air-flow size and material collection floss hole, position all realize controllable, realize 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 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.
3), 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.
4), 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 left view of Fig. 1.
Fig. 3 is the top view in the first classification storehouse.
Fig. 4 is the structural representation that top cover is removed in the first classification storehouse.
Fig. 5 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-horizontal gas flow playpipe
311-feeder trough 32-bottom blowing air current playpipe 33-dedusting mouth
34-the first thick discharge of materials pipe 35-changeover portion discharge of materials pipe
36-the first thin discharge of materials pipe 37-dividing plate 40-support
The collection floss hole of 341-the first thick discharge of materials pipe
The collection floss hole of 351-changeover portion discharge of materials pipe
The collection floss hole of 361-the first thin discharge of materials pipe
The specific embodiment
As shown in Figure 1, 2, a kind of injecting type powder remover for dry classification before the Bed for Fine Coal choosing, it comprises following part:
Scalping district 10, scalping district 10 comprises the first classification storehouse 30 that is arranged on the support 40, be provided with feeder trough 311 on the first classification storehouse 30, dedusting mouth 33 and crosscurrent spray classification mechanism, described feeder trough 311 and dedusting mouth were located at the both sides in the first classification storehouse 30 in 33 minutes, the downside in the first classification storehouse 30 is provided with the first thick discharge of materials pipe 34, changeover portion discharge of materials pipe 35 and the first thin discharge of materials pipe 36, the described first thick discharge of materials pipe 34, the collection floss hole of changeover portion discharge of materials pipe 35 and the first thin discharge of materials pipe 36 all arranges up so that the material after the collection scalping; The collection floss hole of the described first thick discharge of materials pipe 34 and the first thin discharge of materials pipe 36 all stretches out in the outside in the first classification storehouse 30, and the discharge gate of described changeover portion discharge of materials pipe 35 is connected with the charging aperture in secondary grading district 20;
Preferably, described crosscurrent sprays classification mechanism and comprises the horizontal gas flow playpipe 31 that is arranged on the first classification storehouse 30 1 sides and the bottom blowing air current playpipe 32 that is arranged on the first classification storehouse 30 upsides, and described feeder trough 311 is connected with horizontal gas flow playpipe 31; The described first thick discharge of materials pipe 34, changeover portion discharge of materials pipe 35 and the first thin discharge of materials pipe 36 are from setting gradually away from horizontal gas flow playpipe 31 1 sides near horizontal gas flow playpipe 31 1 side direction.
A minute multi-pipeline enters the first classification storehouse 30 after the high pressure draught that the velocity magnitude that sprays in the described horizontal gas flow playpipe 31 is adjustable and the mixing of materials, guarantees that each particle size fraction material has less speed difference, thereby strengthens grading effect.
Further, the collection floss hole of the described first thick discharge of materials pipe 34, changeover portion discharge of materials pipe 35 and the first thin discharge of materials pipe 36 all is the front side that laterally is laid in horizontal gas flow playpipe 31 ejection air-flows.
Preferably, the air outlet place of described horizontal gas flow playpipe 31 is provided with and is convenient to air-flow and the equally distributed air distributor of material; The air outlet of bottom blowing air current playpipe 32 laterally is laid in the front side of horizontal gas flow playpipe 31 ejection air-flows.
Further, described bottom blowing air current playpipe 32 is disposed with a plurality of along the direction of advance of horizontal gas flow playpipe 31 ejection air-flows.
Further, described bottom blowing air current playpipe 32 and the first classification storehouse 30 are for being flexibly connected; Perhaps the mouth of pipe of bottom blowing air current playpipe 32 is adjustable towards angle.
Described bottom blowing air current playpipe 32 is connected by the warehouse of hinge with the first classification storehouse 30, and incident direction and the air-flow size of bottom blowing air current playpipe 32 ejection gases are all adjustable, thereby regulates pan feeding, strengthens grading effect.
As preferred version of the present utility model, be provided with dividing plate 37 between the collection floss hole 361 of the collection floss hole 351 of the collection floss hole 341 of the described first thick discharge of materials pipe 34 and changeover portion discharge of materials pipe 35, the collection floss hole 351 of changeover portion discharge of materials pipe 35 and the first thin discharge of materials pipe 36.
Further, position and the openings of sizes of the collection floss hole of the first thick discharge of materials pipe 34, changeover portion discharge of materials pipe 35 and the first thin discharge of materials pipe 36 then can be adjusted according to the actual grain size needs for being flexibly connected in described dividing plate 37 and the first classification storehouse 30.
Preferably, 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 changeover portion discharge of materials pipe 35 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, 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. 1～5 pair course of work of the present utility model.
Material feeds horizontal gas flow playpipe 31 by feeder trough 311, the material level under the effect of high pressure draught that enters horizontal gas flow playpipe 31 is injected the first classification storehouse 30, simultaneously material is subject to being positioned at the effect of the vertical air-flow that the bottom blowing air current playpipe 32 of the first classification storehouse 30 warehouse upsides sprays, material separates under the comprehensive function of the crosswise jet stream of gravity and horizontal gas flow and vertical air-flow, thick material will fall into first the collection floss hole 341 of the first thick discharge of materials pipe 34, then changeover portion material and thin material fall into respectively the collection floss hole 351 of changeover portion discharge of materials pipe 35 and the collection floss hole 361 of the first thin discharge of materials pipe 36, gained once thin material is discharged and is collected by the first thin discharge of materials pipe 36, and once thick material is then discharged and collected by the first thick discharge of materials pipe 34; Described changeover portion material will fall to secondary high-pressure along changeover portion discharge of materials pipe 35 and spray in the airduct 21, thereby finish 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 (10)
1. one kind is used for the injecting type 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) that is arranged on the support (40), be provided with feeder trough (311) on the first classification storehouse (30), dedusting mouth (33) and crosscurrent spray classification mechanism, described feeder trough (311) and dedusting mouth (33) divide the both sides that are located at the first classification storehouse (30), the downside in the first classification storehouse (30) is provided with the first thick discharge of materials pipe (34), changeover portion discharge of materials pipe (35) and the first thin discharge of materials pipe (36), the described first thick discharge of materials pipe (34), the collection floss hole of changeover portion discharge of materials pipe (35) and the first thin discharge of materials pipe (36) all arranges up so that the material after the collection scalping; The discharge gate of the described first thick discharge of materials pipe (34) and the first thin discharge of materials pipe (36) all stretches out in the outside in the first classification storehouse (30), and the discharge gate of described changeover portion discharge of materials pipe (35) is connected with the charging aperture of secondary grading district (20);
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 changeover portion discharge of materials pipe (35), 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 injecting type powder remover for dry classification before the Bed for Fine Coal choosing according to claim 1, it is characterized in that: described crosscurrent sprays classification mechanism and comprises the horizontal gas flow playpipe (31) that is arranged on the first classification storehouse (30) one sides and the bottom blowing air current playpipe (32) that is arranged on the first classification storehouse (30) upside, and described feeder trough (311) is connected with horizontal gas flow playpipe (31); The described first thick discharge of materials pipe (34), changeover portion discharge of materials pipe (35) and the first thin discharge of materials pipe (36) are from setting gradually away from horizontal gas flow playpipe (31) one sides near horizontal gas flow playpipe (31) one side direction.
3. the injecting type powder remover for dry classification before the Bed for Fine Coal choosing according to claim 2 is characterized in that: the collection floss hole of the described first thick discharge of materials pipe (34), changeover portion discharge of materials pipe (35) and the first thin discharge of materials pipe (36) all is and laterally is laid in the front side that horizontal gas flow playpipe (31) sprays air-flow.
4. the injecting type powder remover for dry classification before the Bed for Fine Coal choosing according to claim 2, it is characterized in that: the air outlet place of described horizontal gas flow playpipe (31) is provided with is convenient to air-flow and the equally distributed air distributor of material; The air outlet of described bottom blowing air current playpipe (32) laterally is laid in the front side of horizontal gas flow playpipe (31) ejection air-flow.
5. the injecting type powder remover for dry classification before the Bed for Fine Coal choosing according to claim 4, it is characterized in that: described bottom blowing air current playpipe (32) is disposed with a plurality of along the direction of advance of horizontal gas flow playpipe (31) ejection air-flow.
6. the injecting type powder remover for dry classification before the Bed for Fine Coal choosing according to claim 4 is characterized in that: described bottom blowing air current playpipe (32) and the first classification storehouse (30) are for being flexibly connected; Perhaps the mouth of pipe of bottom blowing air current playpipe (32) is adjustable towards angle.
7. each described injecting type powder remover for dry classification before the Bed for Fine Coal choosing is characterized in that: be provided with dividing plate (37) between the collection floss hole (351) of the collection floss hole (341) of the described first thick discharge of materials pipe (34) and the collection floss hole (351) of changeover portion discharge of materials pipe (35), changeover portion discharge of materials pipe (35) and the collection floss hole (361) of the first thin discharge of materials pipe (36) according to claim 2～6.
8. the injecting type powder remover for dry classification before the Bed for Fine Coal choosing according to claim 7 is characterized in that: described dividing plate (37) and the first classification storehouse (30) are for being flexibly connected.
9. the injecting type 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 changeover portion discharge of materials pipe (35) 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.
10. the injecting type powder remover for dry classification before the Bed for Fine Coal choosing according to claim 9, 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 201220580237 CN202845334U (en) | 2012-10-26 | 2012-10-26 | Jet type powder removing machine for dry grading of fine coal before selection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220580237 CN202845334U (en) | 2012-10-26 | 2012-10-26 | Jet type powder removing machine for dry grading of fine coal before selection |
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| Publication Number | Publication Date |
|---|---|
| CN202845334U true CN202845334U (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220580237 Expired - Fee Related CN202845334U (en) | 2012-10-26 | 2012-10-26 | Jet type powder removing machine for dry grading of fine coal before selection |
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| Country | Link |
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| CN (1) | CN202845334U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106362948A (en) * | 2016-11-30 | 2017-02-01 | 德米特（苏州）电子环保材料有限公司 | Granule screening equipment |
-
2012
- 2012-10-26 CN CN 201220580237 patent/CN202845334U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106362948A (en) * | 2016-11-30 | 2017-02-01 | 德米特（苏州）电子环保材料有限公司 | Granule screening equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20131026 |