CN1751811A - Dry type gradation equipment for coal - Google Patents
Dry type gradation equipment for coal Download PDFInfo
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- CN1751811A CN1751811A CN 200510098970 CN200510098970A CN1751811A CN 1751811 A CN1751811 A CN 1751811A CN 200510098970 CN200510098970 CN 200510098970 CN 200510098970 A CN200510098970 A CN 200510098970A CN 1751811 A CN1751811 A CN 1751811A
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Abstract
A dry-method coal classifying apparatus features that airflow sprayed from wind distributing plate and the vibration of wind distributing plate are used to make the coal layer on wind distributing plate become fluidized vibration bed for classifying the coal. Its improvements include arranging a coal spreading unit (pneumatic or mechanical spreader or pneumatic nozzles) in the coal feeding region for uniformly spreading the coal onto wind distributing plate and designing the wind distributing plate to make its central porosity less than that of boundary region for high classifying efficiency.
Description
Technical field
The present invention relates to a kind of device that loose unpacked material is separated, refer in particular to a kind of dry type gradation equipment that is applicable to coal.
Background technology
At present, the common method of coal being carried out classification is to adopt screening machine to sieve, during operation, though it can be according to the size of screen size, coal is divided into granularity greater than the oversize of screen size and the granularity screenings less than screen size, but when running into moist coal, the screening of screening machine exists such defective, be the sieve pore blockade problem, the more little easy more obstruction of sieve aperture.Therefore, generally greater than 6mm, when granularity during less than 6mm, the screening efficiency of screening machine is very low or can't normal operation with the partition size of screening machine for existing coal.In order to solve the blockage problem of coal screening machine sieve aperture, the inventor utilizes the pneumatic classification principle, dry classification method for coal and device had once been proposed, be that China Patent No. is just to have disclosed a kind of like this clasfficiator in 93111761.5 " dry classification method for coal and device ", it comprises casing, be installed in the vibrator on the casing, be positioned at grading room and the air-supply arrangement that is located at lower box on the casing, casing top is provided with charging aperture and the outlet that links to each other with grading room respectively successively, drive by vibrator in the installation of the middle part of casing, the oscillating plate that tilts of charging aperture dorsad, be furnished with the wind region that high opening rate band and low percent opening band form on this oscillating plate at interval, end at wind region is fixed with an internal partition downwards, and the top of wind region end is crossed with the adjustable plate of regulating the fluid bed height, wherein the blow tank that formation communicates with grading room between demarcation strip and the box inside wall.During use, the moist coal that mixes drops on the oscillating plate by charging aperture, and along with the vibration of oscillating plate, move in the grading room along the plate face, air that is provided by air-supply arrangement or hot flue gas pass oscillating plate and enter grading room, form several height, weathering zone, at height, under the mating reaction of weathering zone air-flow and the vibration of oscillating plate, in the grading room bottom, form moving bed above the oscillating plate, fluid bed, air flow bed combines, flow perturbation is strong, the gas-solid flow field of collision friction fierceness between particle, the moist coal group of mixing is disperseed fast, large coal particles is mobile status, move along oscillating plate, discharge from blow tank by the gap between adjustable plate and the oscillating plate apace, middle particulate coal overflows into blow tank in the overflow mode and discharges, small-particle coal is entrained with grading room by air-flow, collect by downstream separator and deduster, regulate air velocity, can make the arbitrary particle diameter of partition size in 0.5mm～6mm scope carry out high-effective classifying, and no dust pollution, so this device has solved the defective of conventional screen extension set well.But still find following defective in actual use: 1. when charging, because the barrier effect of air-flow, coal charge can stagnate and amass on the discharging opening of feeder trough, promptly in the charging aperture on casing top, consequently can't realize continuous-feeding.And in case coal amount in feeder trough when being accumulated to a certain degree, then coal charge overcomes stopping of strength by self gravity and is slipped on the oscillating plate, thereby charging phenomenon by spells can occur in whole classification process.Especially when the moisture of coal is big, the coal charge that this periodicity falls can be deposited in the head end of air distribution plate or the high seam of a ridge one ridge occurs on air distribution plate, so that can't lean on air-flow that it is dispelled, can only move to discharge end from feed end by means of the vibration force of oscillating plate, promptly not classifiedly just drain by blow tank, obviously, such structure has seriously influenced grading effect.2. because oscillating plate adopts the alternate cloth wind structure of high and low percent opening band, thereby the coal charge of throwing when the high opening rate band is when falling adjacent low percent opening band, be subjected to the barrier effect of high opening rate band air-flow, the coal charge that accumulates on the low percent opening band can not be transferred to next adjacent high opening rate band in time, have only when coal charge to be stacked into when a certain amount of, overcome the strength of high opening rate and move into the high opening rate band by the gravity of coal charge self.To this coal charge that moves into suddenly, will the air-flow of corresponding high opening rate band be reduced suddenly simultaneously, weakened the upthrow ability of breaking up then widely, and finally reduced grading effect coal charge.3. because this device carries out classification by particle sinking speed, so in grading room, particularly at the pyramidal area of grading room some particles that do not increase and be unable to come down, in the certain height zone, seethe up and down that always suspending, its existence will directly hinder blowing out of small-particle coal, and service time one is long, above-mentioned particle can be cumulative at pyramidal area, form one deck coal obstruction band when serious even at pyramidal area, cause small-particle coal in time to discharge, thereby cause the grading plant can't operate as normal, make that its inefficiency and grading effect are poor.4. because grading room adopts up big and down small cross section and wall effect, so it is big that wind speed appears in its center easily, the less phenomenon of wind speed then appears in its near wall region territory, both sides, when this makes actual classification, the coal grain that on the one hand makes a large amount of upthrows is from the near wall region domain dropping, and is slipped to the less oscillating plate dual-side of air velocity along wall, shifts to discharge gate along dual-side at last and discharges, so that the buckwheat coal that wraps therein can not be separated and elutriation fully, and reduces effectiveness of classification.Make that on the other hand center coal grain is few, both sides near wall region coal grain is many, and wind distribution and coal charge distribution coupling are improper, cause center wind power utilization rate low, have promptly reduced the disposal ability of unit air volume, cause energy consumption bigger than normal.5. low percent opening band gas speed is little, and material or clogging appear leaking in air vent easily.6. because grading room outlet area and grading room main body arrange that at right angles so the zig zag of outlet area can influence the even distribution of classification indoor air flow, and the reduction classification efficiency.7. total air compartment and separating chamber are arranged on the vibration casing, and mass of vibration is big, the manufacturing cost height.And because total air channel roughly is the L type, make that the interior flows outside pressure drop difference in total air channel is not big, promptly outside wind speed is greater than inboard wind speed, thereby causes the wind-force inequality in each minute air channel during the air channel entering each minute, is difficult to control the wind speed size in each minute air channel when making work.Therefore the structure of above-mentioned grading plant still has unsatisfactory part, need await further improvement.
Summary of the invention
First technical problem to be solved by this invention is the defective at prior art, provide a kind of can overcome charging the time the coal charge packing phenomenon and improve the dry type gradation equipment for coal of grading effect.
Second technical problem to be solved by this invention is the defective at prior art, and stagnate long-pending phenomenon and can make coal charge obtain the dry type gradation equipment for coal of abundant elutriation again of a kind of coal charge can overcome charging the time is provided.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this dry type gradation equipment for coal comprises casing, be positioned at grading room and the air-supply arrangement of being located at lower box on the casing, in the described casing air distribution plate is installed, on this air distribution plate, be furnished with and above-mentioned grading room bottom and the corresponding wind region of air-supply arrangement, and the head end of this air distribution plate and feeder trough corresponding with it have been formed coal and have been fed the district, then be provided with the blow tank that the particulate coal be convenient on the air distribution plate is discharged with it on the terminal corresponding casing, it is characterized in that: described coal feeds the district and is provided with the coal that coal charge is sent out on the air distribution plate bed surface continuously and sows device.
It can be the pneumatic nozzle that is positioned at described air distribution plate head end place that described coal is sowed device, and this pneumatic nozzle links to each other with independent blower fan by the independent ventiduct that is installed in described air distribution plate below.
It also can be that the strength that is positioned at described feeder trough is sowed device that described coal is sowed device, is to link to each other with source of the gas and be arranged on air nozzle on the corresponding wall of feeder trough.Or the machinery that is positioned at feeder trough sows device, is a rotary blade that is driven by driving mechanism.Perhaps be one can be around the coal passing plate of its upper shaft swing.Perhaps be one group of skewed guide plate of on short transverse, placing at interval, form the inclination coal outlet under the corresponding height between each guide plate successively.Or above-mentioned strength sow device and machinery sow device mutual combination, promptly can combine by above-mentioned air nozzle and rotary blade; Perhaps combine, perhaps combine by above-mentioned air nozzle and above-mentioned one group of guide plate by above-mentioned air nozzle and above-mentioned coal passing plate.
Described coal is sowed device can also sow device or machinery is sowed mutually combining of device for the strength of above-mentioned pneumatic nozzle that is positioned at the air distribution plate head end and feeder trough.
As a further improvement on the present invention, wind region territory, the center percent opening of described air distribution plate can be less than the percent opening in its dual-side zone.
As another kind of improvement the of the present invention, the casing of described blow tank top and grading room cone position can be provided with a plurality of barriers hurdle of blow tank inclination dorsad, upper end successively along short transverse, form the discharging opening of the particulate coal of corresponding height between each barrier hurdle successively.
Improve again as of the present invention, described grading room can comprise the pyramidal area that the bottom is big up and small down and the current stabilization district and the outlet area on top again, and the top of described pyramidal area is symmetrically arranged with the deflector that the upper end tilts to the both sides of this pyramidal area hang plate.
In above-mentioned each scheme, described air-supply arrangement comprises and is positioned at the branch air-valve that air distribution plate below is separated into the L type branch air channel of a plurality of gradual transition and is installed in each minute air channel air inlet place, and each minute the air channel air outlet corresponding to the wind region on the air distribution plate.
Compared with prior art, the invention has the advantages that: the active force that 1. can sow device by means of coal, the coal charge that falls in the feeder trough is disseminated on the bed surface of air distribution plate, prevent effectively so on the one hand that coal charge from only dropping in narrow the feed zone in and phenomenon is amassed in stagnating of occurring, the defective of having avoided the high seam of being piled into to be broken up by air-flow; Also ensure the continuity and the uniformity of charging on the other hand, thereby can improve classification disposal ability of the present invention and grading effect greatly.2. utilize the structure of the center wind region percent opening of air distribution plate less than its dual-side regional opening rate, can make the coal charge of throwing the grading room divergent segment on the wind region of center and being slipped to air distribution plate respective sides limit along the grading room two side, come back to the center and by throwing once more, to form the systemic circulation of particle, after so repeatedly circulating, fine grained is wherein fully separated, avoided discharging from blow tank together with the duff material that wraps wherein, thereby improved grading effect owing to wall effect makes the coal charge of falling the air distribution plate dual-side.3. owing to be provided with a plurality of barriers hurdle, therefore those size particles that are trapped in differing heights in grading room then can be able to timely discharge by the discharging opening between the corresponding barrier hurdle, having eliminated thus in the prior art should the formed obstruction band in zone, make small-particle coal discharge from the outlet area of grading room swimmingly, therefore after adopting this barrier hurdle, can make clasfficiator high efficiency of the present invention, grading effect is good.4. the deflector of She Zhiing impels the air-flow distribution on the grading room cross section to be tending towards evenly, makes also that simultaneously the large coal particles that is launched on the deflector by air-flow in time falls after rise, plays the effect of interception large coal particles.5. with each minute the air channel be designed to the L type air channel of gradual transition, make the isolation mutually between the asymptotic expression transition region of each minute air channel, eliminate the phenomenon of wind speed inequality between each minute air channel fully, thereby more helped the wind speed control in each minute air channel, made the grading effect better.Make that simultaneously whole air compartment duct resistance is little, energy consumption is low, compact conformation.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the invention;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
Fig. 3 is the structural representation at feeder trough place among Fig. 1;
Fig. 4 is the structural representation of air distribution plate among Fig. 1;
Fig. 5 be among Fig. 4 B-B to structural representation;
Fig. 6 is the structural representation of second embodiment of the invention;
Fig. 7 is the structural representation of third embodiment of the invention;
Fig. 8 is the structural representation at feeder trough place among Fig. 7;
Fig. 9 is the structural representation of impeller among Fig. 7;
Figure 10 is the structural representation at feeder trough place in the fourth embodiment of the invention;
Figure 11 is the structural representation at feeder trough place in the fifth embodiment of the invention;
Figure 12 is the structural representation at feeder trough place in the sixth embodiment of the invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
In order to make present embodiment have better grading effect, above-mentioned air distribution plate 4 structures are designed to the percent opening of center wind region percent opening less than its dual-side zone, as shown in Figure 4 and Figure 5, this air distribution plate 4 comprises a plurality of gratings 41, bracket 42 and cushion block 44, each grating 41 and cushion block 44 compartment of terrain successively are enclosed within on the bracket 42 and are tightened to one, to form the bar shaped sieve, the slit that forms between each grating 41 is the ventilation strip hole.Grating is placed with 0 °～30 ° inclination angle.Like this, change cushion block 44 thickness can be regulated the gap width between the adjacent grating 41, the size of just regulating air vent.Simultaneously, be the percent opening that makes air distribution plate center wind region percent opening, can behind some ventilation strip holes, stop up a strip hole with pad 43, to reduce the air output in this zone at air distribution plate center wind region less than its dual-side zone.Like this because the percent opening in wind region dual-side zone is bigger, eliminated wall effect, make the coal charge that is slipped to the wind region dual-side can be thrown or get back to the center again again, cause it by throwing once more, thereby form the repeatedly circulation upthrow of particle, fine grained is wherein fully separated, avoided from blow tank 11, discharging, finally guaranteed grading effect owing to wall effect makes the duff material.
Simultaneously, corresponding grading room position is provided with a plurality of barriers hurdle 22 (seeing Fig. 1 and Fig. 2) of blow tank inclination dorsad, upper end successively along short transverse above blow tank 11, form the particulate coal discharging opening of corresponding height between each barrier hurdle 22 successively, consider the closure of grading room integral body, here, this barrier field is within casing 1 and grading room 2 pyramidal areas, and form the tapping channel that is connected with blow tank 11 between each barrier hurdle 22 and casing and the grading room inwall, pass through tapping channel from the isolated size particles coal of each discharging opening like this, discharge by blow tank 11.
In order to improve classification disposal ability and grading effect, be symmetrically arranged with the deflector 23 that the upper end tilts to the both sides of this pyramidal area hang plate on the top of pyramidal area, and be provided with the baffle 24 of quadrangular shape at outlet area, the wind that blows so from bottom to top enters the current stabilization district more equably under the effect of deflector 23.And under the effect of baffle 24, can overcome corner's wind direction variation and generation to current stabilization district influence on flow field, when guaranteeing that the duff grain is discharged fully, can prevent the short circuit of carrying secretly of large coal particles again.
And described air-supply arrangement 3 comprises the L type branch air channel 31 and the branch air-valve 32 that is installed in each minute air channel air inlet place that the air distribution plate below is separated into a plurality of gradual transition, each minute the air channel air outlet corresponding to the wind region of described air distribution plate, wind speed between each minute air channel is independent of each other like this, so that the adjusting of air quantity, can also reduce duct resistance, cut down the consumption of energy.
In order to accelerate coarse granule coal moving on air distribution plate 4, this air distribution plate is designed to oscillatory type, promptly vibrator 6 in the casing realizes by being installed in, and this vibrator adopts the exciting mode of driven by motor eccentric block, also can adopt known technologies such as vibrating motor.When vibrator 6 energising vibrations, but drive case 1 and air distribution plate 4 vibrations to quicken coarse granule coal charge moving on air distribution plate 4, successfully discharge large coal particles.Because casing 1 is in vibrational state in the course of the work always, therefore its with grading room 2 between the flexible cover plate 25 of employing be tightly connected, as depicted in figs. 1 and 2, this cover plate 25 covers outside the connector of the two, the one end is fixed on the casing 1, the other end and grading room 2 are the disengagement shape, in order to eliminate the noise that vibration the time is sent, are provided with bloop on the contact-making surface between cover plate and grading room, the casing.Because grading room is negative pressure when work, therefore in the course of the work, this cover plate 25 covers connector all the time.And replace above-mentioned cover plate by the outer-enwraped type structure between casing and the air compartment, promptly on the connector of casing and air compartment, flexible bag sheet 12 is arranged, thereby overcome the defective that canvas damages easily in the prior art with bolting.
During work, coal is transported in the feeder trough 21 by conveyer belt 4 and falls, air-flow by air nozzle 5 ejections, coal charge is scattered on the bed surface of air distribution plate 4, and air or hot flue gas through each minute air channel 31 pass air distribution plate 4 from bottom to top along the air vent on the air distribution plate 4 and enter in the grading room 2, under the acting in conjunction of said flow and vibrator 6 vibration forces, make the coal seam on the air distribution plate form vibrated fluidized bed, make the coal of different sizes be different motion states, be that large coal particles moves on air distribution plate 4 or beats, be mobile status, finally hold by air distribution plate 4 by deadweight and above it discharging opening between barrier hurdle fall in the blow tank 11; The small particles coal is done upthrow motion by the high velocity air air distribution plate 4 that blows off, wherein, after the small particles coal of throwing the grading room pyramidal area from the center of air distribution plate 4 is slipped to air distribution plate 4 dual-side zones, again by the high velocity air band upthrow in dual-side zone or blow and get back to the air distribution plate central area and upthrow, to form the systemic circulation of particle, like this through repeatedly the circulation middle particle by on throw certain altitude after, a part diminishes owing to gas speed, can not continue to rise with air-flow, enter in the blow tank 11 by discharging opening between each barrier hurdle 22 of corresponding height and tapping channel and drain; The fine particle coal is then directly carried secretly by air-flow, is the strength feed status, by current stabilization district and outlet area, drains from outlet successively.The duff grain of draining from the exit is separated discharge through the separator of next stage, and the coal dust of not separating is collected by cyclone dust collectors again, most of air communication is crossed circulating fan and is recycled to clasfficiator, a small amount of air-flow behind sack cleaner by the air-introduced machine emptying, so whole system is a negative-pressure operation, no dust pollution.
Embodiment 2: as shown in Figure 6, itself and the above-mentioned first embodiment difference are: it is the pneumatic nozzle that is positioned at air distribution plate head end place that described coal is sowed device, and this pneumatic nozzle links to each other with independent blower fan (among the figure and do not show) by the independent ventiduct 7 that is installed in air distribution plate 4 belows.The coal charge that falls from conveyer belt like this, provide wind-force by independent ventiduct to pneumatic nozzle by independent blower fan, enough wind-force is provided promptly for the head end place of air distribution plate, loose to upthrow in the coal seam at this place, make coal charge send out continuously on the bed surface of air distribution plate, thereby avoided the coal charge packing phenomenon at air distribution plate head end place effectively, to guarantee normally carrying out of classification work.Identical among ensuing classification process and above-mentioned first embodiment, be not repeated at this.
Protection scope of the present invention is not limited to the foregoing description, sows device pneumatic nozzle that adopts air distribution plate 4 head end places and the strength that is positioned at feeder trough 21 as coal and sows device or mechanically sow the scheme that device combines.Perhaps adopt combining of coal passing plate and nozzle.Perhaps adopt combining of nozzle and one group of guide plate.Perhaps the barrier hurdle in first embodiment design is on the end plate of grading room, is about to be positioned within the scope that design on the end plate of pyramidal area has barrier hurdle, such scheme all to belong to the present invention to be protected.
Claims (10)
1, a kind of dry type gradation equipment for coal, it comprises casing (1), be positioned at the grading room (2) on the casing and be located at the air-supply arrangement (3) of lower box, air distribution plate (4) is installed in the described casing, on this air distribution plate, be furnished with and above-mentioned grading room bottom and the corresponding wind region of air-supply arrangement, and head end of this air distribution plate (4) and feeder trough corresponding with it have been formed coal and have been fed the district, then be provided with the blow tank (11) that the particulate coal be convenient on the air distribution plate is discharged with it on the terminal corresponding casing, it is characterized in that: described coal feeds the district and is provided with the coal that coal charge is sent out on air distribution plate (4) bed surface continuously and sows device.
2, dry type gradation equipment for coal according to claim 1, it is characterized in that: it is the pneumatic nozzle that is positioned at described air distribution plate (4) head end place that described coal is sowed device, and this pneumatic nozzle links to each other with independent blower fan by the independent ventiduct (7) that is installed in described air distribution plate below.
3, dry type gradation equipment for coal according to claim 1 is characterized in that: described coal is sowed device and is positioned at described feeder trough (21).
4, dry type gradation equipment for coal according to claim 3 is characterized in that: it is one to link to each other with source of the gas and be arranged on air nozzle (5) on the corresponding wall of feeder trough that described coal is sowed device.
5, dry type gradation equipment for coal according to claim 3 is characterized in that: it is a rotary blade (8) by the driving mechanism drive that described coal is sowed device.
6, dry type gradation equipment for coal according to claim 3 is characterized in that: it is the coal passing plate (9) that can swing around its position, upper end that described coal is sowed device.
7, dry type gradation equipment for coal according to claim 3 is characterized in that: on described coal is sowed rotary blade (8) that device drives by driving mechanism and is arranged on the corresponding wall of feeder trough and the air nozzle (5) that links to each other with source of the gas combine.
8, according to the described dry type gradation equipment for coal of the arbitrary claim of claim 1 to 7, it is characterized in that: the center wind region percent opening of described air distribution plate (4) is less than the percent opening in its dual-side zone.
9, according to the described dry type gradation equipment for coal of the arbitrary claim of claim 1 to 7, it is characterized in that: the casing of described blow tank (11) top and grading room position are provided with a plurality of barriers hurdle (22) of blow tank inclination dorsad, upper end successively along short transverse, form the discharging opening of the particulate coal of corresponding height between each barrier hurdle successively.
10, according to the described dry type gradation equipment for coal of the arbitrary claim of claim 1 to 7, it is characterized in that: described air-supply arrangement (3) comprises and is positioned at the branch air-valve (32) that air distribution plate (4) below is separated into the L type branch air channel (31) of a plurality of gradual transition and is installed in each minute air channel air inlet place, and each minute the air channel air outlet corresponding to the wind region on the air distribution plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100989700A CN100349662C (en) | 2005-08-26 | 2005-09-19 | Dry type gradation equipment for coal |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510060495.8 | 2005-08-26 | ||
| CN200510060495 | 2005-08-26 | ||
| CNB2005100989700A CN100349662C (en) | 2005-08-26 | 2005-09-19 | Dry type gradation equipment for coal |
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| Publication Number | Publication Date |
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| CN1751811A true CN1751811A (en) | 2006-03-29 |
| CN100349662C CN100349662C (en) | 2007-11-21 |
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| CNB2005100989700A Expired - Fee Related CN100349662C (en) | 2005-08-26 | 2005-09-19 | Dry type gradation equipment for coal |
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| CN101186830A (en) * | 2007-11-20 | 2008-05-28 | 济南钢铁股份有限公司 | Material distributing method for fluidized bed used for coking coal air current grading and conditioning |
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| CN102425931A (en) * | 2011-10-23 | 2012-04-25 | 中冶焦耐(大连)工程技术有限公司 | Method and device for diverting and distributing flue gas in gas-material separated manner |
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| US4991721A (en) * | 1988-08-15 | 1991-02-12 | Iowa State University Research Foundation, Inc. | Automation of an air-screen seed cleaner |
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| CN102357324A (en) * | 2011-08-31 | 2012-02-22 | 太原重工股份有限公司 | Flue gas adsorbing and purifying device for coke oven |
| CN102357324B (en) * | 2011-08-31 | 2014-03-19 | 太原重工股份有限公司 | Flue gas adsorbing and purifying device for coke oven |
| CN102338558A (en) * | 2011-10-23 | 2012-02-01 | 中冶焦耐(大连)工程技术有限公司 | Gas-material separation type flue gas diversion distribution device |
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| CN103695017A (en) * | 2013-12-23 | 2014-04-02 | 青岛利物浦环保科技有限公司 | Humidifying and sorting machine of compound fluidized bed coal and humidifying and sorting technology |
| CN103695017B (en) * | 2013-12-23 | 2014-12-24 | 青岛利物浦环保科技有限公司 | Humidifying and sorting machine of compound fluidized bed coal and humidifying and sorting technology |
| CN104368527A (en) * | 2014-11-10 | 2015-02-25 | 安徽理工大学 | Underground quick coal and gangue separation device utilizing wind power |
| CN104368527B (en) * | 2014-11-10 | 2017-06-27 | 安徽理工大学 | The quick wind-force coal-gangue separation device in underground |
| CN109813640A (en) * | 2019-03-07 | 2019-05-28 | 付学超 | A kind of cement fineness detection device |
| CN109813640B (en) * | 2019-03-07 | 2021-06-15 | 付学超 | Cement fineness detection device |
| CN112522863A (en) * | 2020-11-26 | 2021-03-19 | 内蒙古工业大学 | Airflow fiber laying device |
| CN112522863B (en) * | 2020-11-26 | 2021-12-07 | 内蒙古工业大学 | Airflow fiber laying device |
| WO2024036669A1 (en) * | 2022-08-18 | 2024-02-22 | 安徽理工大学 | Water coal slurry concentration device |
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