CN101452280B - Material bed density on-line observing and controlling apparatus and method in dry cleaning system - Google Patents
Material bed density on-line observing and controlling apparatus and method in dry cleaning system Download PDFInfo
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- CN101452280B CN101452280B CN2009100006346A CN200910000634A CN101452280B CN 101452280 B CN101452280 B CN 101452280B CN 2009100006346 A CN2009100006346 A CN 2009100006346A CN 200910000634 A CN200910000634 A CN 200910000634A CN 101452280 B CN101452280 B CN 101452280B
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Abstract
The invention relates to a device and a method for online measuring and controlling of the density of a feed layer of an industrial dry-method coal dressing system online. The invention is used for on-line automatic measuring and controlling of the quality of finished coal (or gangue) in dry-method coal dressing operation. The invention adopts the following technical proposal: two sides of a coal dressing sorting bed are provided with an isotope radioactive source and a signal sensor respectively; according to an absorption rule of a detected material on isotope radial, the density value of the detected material is detected; the detected data and the pre-stored set value are subjected to comparison treatment; and a result is fed back to an execution mechanism to dynamically regulate the feed discharging speed so that the horizontal height of the feed layer with the set density at the discharge end of the sorting bed is still kept in dynamic and stable balance, thereby ensuring the sorting quality of the finished product. The device and the method have the following advantages: the radioactive source is arranged at the top end of an isolated weir (7) of the sorting bed so as to replace the prior mode of manual vision and adjustment of coal dressing parameters by experience so that the dry-method coal dressing process realizes digital automatic measuring and controlling of parameters, improves sorting precision and efficiency and greatly reduces labor intensity of operators simultaneously.
Description
Technical field:
The present invention relates to a kind of industrial dry coal preparation system bed of material density online monitoring method device and method, be used for the on-line automatic observing and controlling of dry coal preparation operation readymade coal (or spoil) quality.
Background technology:
At present, in the dry coal preparation production operation, coal separation sorting bed material realizes that by air jigging spoil density is higher than coal by the density vertical distribution before arriving discharge end horizontal subdivision weir, and sedimentation forms the bottom spoil bed of material in the jigging process; The density of coal is relatively low, come-up forms the cleaned coal bed of material, the horizontal subdivision weir of sorting bed discharge end will be cut apart by predefined separating density value level by the material of density gradient vertical distribution, the cleaned coal bed of material enters the cleaned coal discharging opening from separating weir top overflow, and the spoil bed of material is discharged by the spoil refuse rotor.Mainly its variation of visualization by rule of thumb of the control of readymade coal quality relies on artificial on-site manual conditioning equipment operational factor.This method of operating is difficult to the realization Standardize operation, and control accuracy is relatively low, finished product ature of coal less stable, and labor intensity of operating staff is big, and personnel's technical training is comparatively complicated, the needs that the incompatibility modern enterprise is produced.
Summary of the invention:
The object of the invention provides a kind of dry coal preparation system bed of material density online monitoring method device and method, and is accurately reliable by the on-line automatic observing and controlling to bed of material density, improves the readymade coal quality, solves the problems referred to above that background technology exists.
The present invention seeks to realize by following technical scheme:
Dry coal preparation system bed of material density online monitoring method method is: the both sides at coal separation sorting bed are provided with isotope radioactive source and signal transducer respectively, according to the absorbing rule detection material density value of tested material to the isotope ray; Detecting data handles with the setting value comparison that stores in advance, feed back to topworks's dynamic regulation discharge velocity then, make the level height of the bed of material that sets density remain the dynamic stability balance, thereby guarantee the sorting quality of readymade coal at sorting bed discharge end place.
The isotope ray is when passing measured matter, and a part of ray can be absorbed and scattering, cause the radiation intensity decay, and the ray attenuation degree is relevant with the mass density of measured matter; Signal transducer amplifies input density instrument after the shaping with the signal that receives, and the microprocessor in the density instrument draws the weighted value of tested material density by mathematical operation.
Said isotope radioactive source is arranged on sorting bed one side, discharge end is separated the apical position on weir, as the online check point of bed of material density, the signal transducer setting is the opposite side of sorting bed, the position that is complementary with the isotope emissive source, be used to receive and pass the sense radiation signal of separating the weir crest portion bed of material and carry out processing and amplifying, detect data and be converted into electric signal output, by comparing with PLC (Programmable Logic Controller) program and the setting value that stores in advance after the computing of density instrument, feed back signal to frequency conversion mechanism and go back to control topworks through the PID computing again, enforcement is to the dynamic regulation of discharge velocity, make the level height of the bed of material that sets density remain the dynamic stability balance, thereby guarantee the sorting quality of readymade coal at sorting bed discharge end place.
Dry coal preparation system bed of material density online monitoring method device comprises the sorting bed, the isotope radioactive source, signal transducer, the density instrument, PLC, frequency conversion mechanism and time control topworks, the isotope radioactive source is arranged on the discharge end of sorting bed one side and separates the weir crest end position, as the online check point of bed of material density, the signal transducer setting is the opposite side of sorting bed and the position that the isotope emissive source is complementary, be used to receive and pass the sense radiation signal of separating the weir crest portion bed of material and carry out processing and amplifying, detection signal converts by the density instrument and handles back input PLC, with the setting value comparison that stores in advance, feed back signal to frequency conversion mechanism and go back to control topworks through the PID computing again, implement On-line Control sorting bed bed of material density.
Dry coal preparation system bed of material density online monitoring method device also is provided with radioactive stand, sensor stand, sorting bed signal window, the isotope radioactive source is used to provide ray signal, is fixedly installed in sorting bed exhaust end and separates on the radioactive stand of weir crest portion position one side; Signal transducer is installed on the sensor stand of sorting bed opposite side, and is corresponding with the position of isotope radioactive source, is used to receive pass the sense radiation signal of separating the weir crest portion bed of material and carry out processing and amplifying; Sorting bed signal window is arranged on the sorting bed two side that ray passes, and is used to avoid the equipment self material to cause the detection signal excessive attenuation.
The control topworks of returning of dry coal preparation system bed of material density online monitoring method device comprises discharge motor, spoil refuse rotor, and the output shaft of discharge motor connects the spoil refuse rotor, drives the spoil refuse rotor and rotates.
Density instrument, PLC system, the frequency conversion mechanism of dry coal preparation system bed of material density online monitoring method device, be installed in the electrical control cubicles, the density instrument is connected with signal transducer, the output of density instrument connects the PLC system, the PLC system connects frequency conversion mechanism, and the output of frequency conversion mechanism connects go back to control topworks.The PLC system analyses and compares to detection signal, output order, the driving frequency of frequency conversion institutional adjustment discharge motor, change the discharge velocity of spoil refuse rotor, thereby adjust sorting bed discharge end thickness of feed layer, make and separate weir crest portion bed of material density value convergence setting separating density value, keep the dynamic stability balance.
Spoil refuse rotor control discharge refuse speed keeps the dynamic stability balance of sorting bed discharge end spoil thickness of feed layer, thereby makes the bed of material position (being the separatrix of the cleaned coal bed of material and the spoil bed of material) of setting the separating density value contour with the horizontal cut-off rule of separating weir plate.
Innovative point of the present invention is first the isotope radioactive source to be applied to the dry coal preparation system, have following advantage and beneficial effect: radioactive source is installed on the sorting bed separates the weir crest end, replace traditional by rule of thumb by artificial visual with regulate the mode of coal separation parameter, make the dry coal preparation procedure parameter realize the digitizing automatic measuring and controlling, improve sharpness of separation and efficient, the while is the reduction operation personnel labor intensity greatly.
Description of drawings:
Fig. 1 is the structural representation in the invention process.
Fig. 2 is the side-looking structural representation in the invention process.
Among the figure: 1. isotope radioactive source; 2. radioactive stand; 3. signal transducer; 4. sorting bed signal window; 5. spoil refuse rotor; 6. cleaned coal discharging opening; 7. separation weir; 8. the cleaned coal bed of material; 9. the spoil bed of material; 10. discharge motor.
Fig. 3 is an observing and controlling schematic flow sheet of the present invention.
Embodiment:
Below in conjunction with accompanying drawing, further specify the present invention by embodiment.
With reference to accompanying drawing 1,2, in an embodiment, dry coal preparation system bed of material density online monitoring method device comprises sorting bed, isotope radioactive source 1, signal transducer 3, frequency conversion mechanism and goes back to control topworks, isotope radioactive source 1 is arranged on sorting bed one side, discharge end is separated the apical position on weir 7, as the online check point of bed of material density, the position that signal transducer 3 is arranged on the opposite side of sorting bed, is complementary with isotope emissive source 1 is used to receive and passes the sense radiation signal of separating the weir 7 top bed of materials and carry out processing and amplifying.Go back to control topworks and comprise discharge motor 10, spoil refuse rotor 5, the output shaft of discharge motor connects the spoil refuse rotor, drives the spoil refuse rotor and rotates.Also be provided with radioactive stand 2, sensor stand, sorting bed signal window 4 among the embodiment, isotope radioactive source 1 is fixedly installed in sorting bed exhaust end and separates on the radioactive stand 2 of weir 7 tip positions, one side; Signal transducer 3 is installed on the sensor stand of sorting bed opposite side, and is corresponding with the position of isotope radioactive source, and sorting bed signal window 4 is arranged on the sorting bed two side that ray passes.Present embodiment also is provided with density instrument, PLC system, frequency conversion mechanism, be installed in the electrical control cubicles, the density instrument is connected with signal transducer, and the output of density instrument connects the PLC system, the PLC system connects frequency conversion mechanism, and the output of frequency conversion mechanism connects go back to control topworks.The PLC system analyses and compares to detection signal, output order, the driving frequency of frequency conversion institutional adjustment discharge motor, change the discharge velocity of spoil refuse rotor, thereby adjust sorting bed discharge end thickness of feed layer, make and separate weir crest portion bed of material density value convergence setting separating density value, keep the dynamic stability balance.Spoil refuse rotor 5 control discharge refuse speed keep the dynamic stability balance of the sorting bed discharge end spoil bed of material 9 thickness, thereby make the bed of material position of setting the separating density value, and promptly the separatrix of the cleaned coal bed of material 8 and the spoil bed of material 9 is contour with the horizontal cut-off rule of separating weir plate.
With reference to accompanying drawing 1,2,3, dry coal preparation system bed of material density online monitoring method method is: in the both sides of coal separation sorting bed isotope radioactive source 1 and signal transducer 3 are set respectively, according to the absorbing rule detection material density value of tested material to the isotope ray.Said isotope radioactive source is arranged on sorting bed one side, discharge end is separated the apical position on weir 7, as the online check point of bed of material density, the signal transducer setting is the opposite side of sorting bed, the position that is complementary with the isotope emissive source, be used to receive and pass the sense radiation signal of separating the weir crest portion bed of material and carry out processing and amplifying, detect data and be converted into electric signal output, by PLC program and the setting value comparison that stores in advance, feed back signal to frequency conversion mechanism and go back to control topworks through the PID computing again, enforcement is to the dynamic regulation of discharge velocity, make the level height of the bed of material that sets density remain the dynamic stability balance, thereby guarantee the sorting quality of readymade coal at sorting bed discharge end place.
In the present embodiment, coal separation sorting bed material realizes that by air jigging spoil density is higher than coal by the density vertical distribution before arriving discharge end horizontal subdivision weir, and sedimentation forms the bottom spoil bed of material 9 in the jigging process; The density of coal is relatively low, come-up forms the cleaned coal bed of material 8, the horizontal subdivision weir of sorting bed discharge end will be cut apart by predefined separating density value level by the material of density gradient vertical distribution, the cleaned coal bed of material enters cleaned coal discharging opening 6 from separating weir top overflow, and the spoil bed of material is discharged by the spoil refuse rotor.According to certain batch of selected coal analysis test findings, the separating density value of setting this batch feed coal is 1.7.With corresponding separating density value coding 4000 input PLC; Control PID processing parameter is returned in sorting, establishes P=260, I=80, D=150; Discharge motor line frequency 38Hz.System in service detects the fluctuation of data reflection pan feeding raw coal ature of coal, measures and separates weir 7 top material density values change, and code displaying is 3700.The PLC system detects the deviation of input signal and setting value, and reflection system's practical separation density value this moment is higher, and the sorting bed discharge end spoil bed of material is thick partially, and the overflow of part spoil enters the cleaned coal discharging opening; So handle through PID, combine with giving at that time, discharge operating parameter, automatic output order, adjust the discharge electric machine frequency and rise to 40Hz, accelerate the rotating speed of spoil refuse rotor 5, quicken discharge refuse, sorting bed surface spoil thickness of feed layer is reduced, the practical separation density value is to setting separating density value convergence.Circulation so repeatedly realizes the closed-loop control to separation system.
Claims (6)
1. dry coal preparation system bed of material density online monitoring method device, it is characterized in that comprising the sorting bed, isotope radioactive source (1), signal transducer (3), the density instrument, the PLC system, frequency conversion mechanism and time control topworks, isotope radioactive source (1) is arranged on the discharge end of sorting bed one side and separates the weir crest end position, as the online check point of bed of material density, signal transducer (3) setting is the opposite side of sorting bed and the position that isotope emissive source (1) is complementary, be used to receive and pass the sense radiation signal of separating the weir crest portion bed of material and carry out processing and amplifying, detection signal converts by the density instrument and handles back input PLC system, with the setting value comparison that stores in advance, feed back signal to frequency conversion mechanism and go back to control topworks through the PID computing again, implement control sorting bed bed of material density.
2. the dry coal preparation system bed of material density online monitoring method device according to claim 1, it is characterized in that also being provided with radioactive stand (2), sensor stand, sorting bed signal window (4), isotope radioactive source (1) is fixedly installed in sorting bed discharge end and separates on the radioactive stand (2) of weir crest end position one side; Signal transducer (3) is installed on the sensor stand of sorting bed opposite side, and is corresponding with the position of isotope radioactive source, and sorting bed signal window (4) is arranged on the sorting bed two side that ray passes.
3. according to claim 1 or 2 described dry coal preparation system bed of material density online monitoring method devices, it is characterized in that said density instrument, PLC system, frequency conversion mechanism, be installed in the electrical control cubicles, the density instrument is connected with signal transducer, the output of density instrument connects the PLC system, the PLC system connects frequency conversion mechanism, and the output of frequency conversion mechanism connects go back to control topworks; Go back to control topworks and comprise discharge motor (10), spoil refuse rotor (5), the output shaft of discharge motor connects the spoil refuse rotor, drives the spoil refuse rotor and rotates.
4. a dry coal preparation system bed of material density online monitoring method method is characterized in that in a side of coal separation sorting bed the isotope radioactive source being set, and opposite side signalization sensor is according to the absorbing rule detection material density value of tested material to the isotope ray; Detecting data handles with the setting value comparison that stores in advance, feed back to topworks's dynamic regulation discharge velocity then, make the level height of the bed of material that sets density remain the dynamic stability balance, thereby guarantee the sorting quality of readymade coal at sorting bed discharge end place.
5. the dry coal preparation system bed of material density online monitoring method method according to claim 4, it is characterized in that signal transducer amplifies input density instrument after the shaping with the signal that receives, microprocessor in the density instrument draws the weighted value of tested material density by mathematical operation.
6. the dry coal preparation system bed of material density online monitoring method method according to claim 5, it is characterized in that said isotope radioactive source is arranged on sorting bed one side, discharge end is separated the apical position on weir, as the online check point of bed of material density, signal transducer is arranged on the opposite side of sorting bed, the position that is complementary with the isotope radioactive source, be used to receive and pass the sense radiation signal of separating the weir crest portion bed of material and carry out processing and amplifying, detect data and be converted into electric signal output by the density instrument, by PLC program and the setting value comparison that stores in advance, feed back signal to frequency conversion mechanism and go back to control topworks through the PID computing again, enforcement is to the dynamic regulation of discharge velocity, make the level height of the bed of material that sets density remain the dynamic stability balance, thereby guarantee the sorting quality of readymade coal at sorting bed discharge end place.
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| CN2009100006346A CN101452280B (en) | 2009-01-12 | 2009-01-12 | Material bed density on-line observing and controlling apparatus and method in dry cleaning system |
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| CN2009100006346A CN101452280B (en) | 2009-01-12 | 2009-01-12 | Material bed density on-line observing and controlling apparatus and method in dry cleaning system |
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| CN101452280A CN101452280A (en) | 2009-06-10 |
| CN101452280B true CN101452280B (en) | 2011-06-08 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056072A (en) * | 1990-04-30 | 1991-11-13 | 湘潭市四维应用技术研究所 | Coal and stone sorting machine |
| CN2229844Y (en) * | 1995-07-11 | 1996-06-26 | 华中理工大学 | Ore sorting machine by rays radiation |
| CN2808342Y (en) * | 2005-07-22 | 2006-08-23 | 丁励 | Gangue automatic separator |
-
2009
- 2009-01-12 CN CN2009100006346A patent/CN101452280B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056072A (en) * | 1990-04-30 | 1991-11-13 | 湘潭市四维应用技术研究所 | Coal and stone sorting machine |
| CN2229844Y (en) * | 1995-07-11 | 1996-06-26 | 华中理工大学 | Ore sorting machine by rays radiation |
| CN2808342Y (en) * | 2005-07-22 | 2006-08-23 | 丁励 | Gangue automatic separator |
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Denomination of invention: Material bed density on-line observing and controlling apparatus and method in dry cleaning system Effective date of registration: 20120929 Granted publication date: 20110608 Pledgee: Bank of Communications Ltd Tangshan branch Pledgor: Tangshan Land Sky Science and Technology Co., Ltd. Registration number: 2012990000583 |
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Granted publication date: 20110608 Termination date: 20180112 |