CN102749345B - Multipoint type detection apparatus for ash content of coal - Google Patents
Multipoint type detection apparatus for ash content of coal Download PDFInfo
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- CN102749345B CN102749345B CN201210202510.8A CN201210202510A CN102749345B CN 102749345 B CN102749345 B CN 102749345B CN 201210202510 A CN201210202510 A CN 201210202510A CN 102749345 B CN102749345 B CN 102749345B
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Abstract
The invention provides a multipoint type detection apparatus for ash content of coal. The apparatus comprises a container, a detector, an electric control machine. The container comprises coal sample cabins, baffle plates and an automatic cinder valve (1). The detector comprises a gamma ray source device, a ray detector, a silicon drift detector (8) and a multichannel data analysis spectrometer (9). The electric control machine comprises a master control system (23), a power source (24) controlled by the master control system (23), a coal flow control system (25), a signal transmission system (26), a data processing and spectrum unfolding system (27) and a display system (27). By using the apparatus, multipoint continuous measurement of the ash content is realized. By pulling the baffle plates, the coal ash content is controlled to be measured in batches, and the coal samples measured by dual-energy gamma-ray are ensured to be in the same batch. Furthermore, the mutual interference between moderate-energy gamma-ray and low-energy gamma-ray is prevented, thus improving the representativeness and accuracy of the measurement.
Description
Technical field
The present invention relates to a kind of coal pick-up unit, be specifically related to a kind of multiple-point coal ash pick-up unit.
Background technology
Ash content of coal measuring instrument comprises laboratory Sample detector and on-line detector, and the laboratory detector measurement result implementing sample detection is accurate, but because of detection architecture delayed, be separated with the Automated condtrol produced.
In various Measurement and analysis, utilize gamma ray technology as a routine techniques, utilize its penetrability this advantage strong, gamma ray is just used to the ash content in metal nondestructive examination and coal many years ago.In recent years, the nucleon measurement technology application that gamma ray is relevant is more extensive, and such as it is in the application in the fields such as cement, coal, ore.
Tradition dual intensity gamma ray mainly contains combined type and the large class formation type of separate type two at grey sorting-detecting instrument.Its structure of the online grey sorting-detecting instrument of combined type dual intensity gamma ray is that dual intensity gamma-ray emission source is installed in same shielding follower, detected by a detector and gather, though this structure has the advantage of favourable identity, but there is interference to low-energy gamma radionetric survey, thus affect its accuracy measured in the middle energy gamma ray be installed in same shielding follower; Dual intensity gamma-ray emission source is arranged in different shielding protection follower respectively, and correspondence arranges two detectors, structurally overcome middle energy gamma ray to the interference of low-energy gamma ray, but occurred the technical matters of homogeneity difference.
Tradition dual intensity gamma ray is that above-mentioned existing online ash content detector does not all take into account low-energy gamma ray and the difference of middle energy gamma ray in optimum measurement thickness in another technical problem underlying of grey sorting-detecting instrument, because the penetration capacity of the gamma ray of two groups of different-energies differs greatly, if cause coal sample thickness to meet effective projection of low-energy gamma ray, then cannot make the intensity of middle energy gamma ray before and after transmission by enough significantly changing, cause measuring accuracy not high, if and the intensity of gamma ray can have and enough significantly change before and after projection in ensureing, just must increase the thickness of coal sample, but so, can by too much for low-energy gamma radiation absorption, low-energy gamma ray after the transmission detected is too low, impact by background and fluctuating effect is excessive, cause larger measuring error.
Summary of the invention
A kind of multiple-point coal ash pick-up unit provided by the invention, comprises container, detecting device and automatically controlled machine,
Described container comprises coal sample storehouse, baffle plate and automatic unloading valve (1);
Described coal sample storehouse is infundibulate, comprises coal sample storehouse A (4) and coal sample storehouse B (5) that described infundibulate coal sample storehouse axially sets gradually from top to bottom;
Described baffle plate is axial vertical with described coal sample storehouse, comprises baffle plate A (6) and baffle plate B (7), lays respectively between described coal sample storehouse A (4) and coal sample storehouse B (5) and below coal sample storehouse B (5);
Described automatic unloading valve (1) is connected with described coal sample storehouse B (5);
Described detecting device comprises gamma-ray source, ray detector, silicon drifting detector (8) and multiple tracks data analysis spectrometer (9);
Described gamma-ray source comprises middle energy gamma ray source Cs-137 (10) and low-energy gamma source Am-241 (11); Described ray detector comprises ray detector A (18) and ray detector B (19); The gamma-ray photon that described middle energy gamma ray source Cs-137 (10) is launched irradiates the coal sample in coal sample storehouse A (4), can be received by ray detector A (18) by gamma ray through in coal sample; The gamma-ray photon that described low-energy gamma source Am-241 (11) is launched irradiates the coal sample in coal sample storehouse B (5), and the low-energy gamma ray through coal sample is received by ray detector B (19);
Described ray detector A (18), ray detector B (19) and the output terminal of silicon drifting detector (8) are connected the input end of described multiple tracks data analysis spectrometer (9); Output terminal, the described baffle plate of described multiple tracks data analysis spectrometer (9) are connected described automatically controlled machine respectively with described automatic unloading valve (1).
In first optimal technical scheme provided by the invention: described coal sample storehouse A (4) is identical with the volume of described coal sample storehouse B (5), described coal sample storehouse A (4) cross-sectional area is greater than the cross-sectional area of described coal sample storehouse B (5), and the height of described coal sample storehouse A (4) is lower than the height of described coal sample storehouse B (5).
In second optimal technical scheme provided by the invention: described coal sample storehouse A (4) upper bottom surface is provided with and connects measurement position entrance (2) that Sampling Machine abandons sample outlet, and described coal sample storehouse B (5) bottom surface is provided with measurement position outlet (3) connecting automatic unloading valve (1).
In 3rd optimal technical scheme provided by the invention: described middle energy gamma ray source Cs-137 (10) and described low-energy gamma source Am-241 (11) are positioned in source protection body A (12) and source protection body B (13) respectively;
Emissive plastic glazing A (14), emissive plastic glazing B (15), collimating aperture A (16) and collimating aperture B (17) is respectively equipped with in source protection body A (12) and source protection body B (13),
Described middle energy gamma ray source Cs137 be positioned in collimating aperture (A), and its center is in the central axial direction of described collimating aperture (A), and the hole depth of described collimating aperture (A) is 7cm;
Described low-energy gamma source Am241 is positioned in the collimating aperture (B) in source protection body (B), and its center is in the central axial direction of collimating aperture (B), and the hole depth of described collimating aperture (B) is 5cm;
The gamma-ray photon that middle energy gamma ray source Cs-137 (10) is launched irradiates the inner coal sample in coal sample storehouse A (4) through lightweight emissive plastic glazing A (14) by collimating aperture A (16);
The gamma-ray photon that low-energy gamma source Am-241 (11) is launched irradiates the inner coal sample in coal sample storehouse B (5) through lightweight emissive plastic glazing B (15) by collimating aperture B (17).
In 4th optimal technical scheme provided by the invention: the material of main part in described source protection body A (12) and source protection body B (13) is all plumbous, shell material used is all carbon contents is 0.10%, silicone content is 0.08%, Fe content is 0.065%, phosphorus content is 0.030%, sulfur content is 0.018%, chromium content is 15.6%, surplus is the reasonable offer of iron, and described percentage is percent by weight.
In 5th optimal technical scheme provided by the invention: described ray detector is NaI scintillation detector or lanthanum bromide detector, described ray detector A (18), ray detector B (19) are connected with the input end of multiple tracks data analysis spectrometer (9) with amplifier C (22) respectively by amplifier A (20), amplifier B (21) with the output terminal of described silicon drifting detector (8), and described amplifier A (20), amplifier B (21) and amplifier C (22) are photomultiplier.
In 6th optimal technical scheme provided by the invention: described automatically controlled machine comprises master control system (23), power supply (24) and the coal flow control system (25) controlled by described master control system (23), signal transmission system (26), data processing and separates spectra system (27) and display system (28);
The output terminal of described multiple tracks data analysis spectrometer (9) connects the described signal transmission system (26) of described automatically controlled machine;
Described container connects the coal flow control system (25) of described automatically controlled machine.
In 7th optimal technical scheme provided by the invention: described coal flow control system (25) controls the extraction of baffle plate A (6) and baffle plate B (7) and sends original position back to, control to start automatic unloading valve (1), the Measuring Time controlling to arrange coal sample is 1-2 minute.
In 8th optimal technical scheme provided by the invention: described automatic unloading valve, speed reduction unit and reducing motor composition unloading valve system, coal flow control system controls described speed reduction unit and described reducing motor; Described automatic unloading valve is star-shaped ash unloading valve, comprises housing, impeller and end cap; Described reducing motor drives described wheel rotation by shaft coupling, and the material of described housing upper is evenly taken to bottom.
In 9th optimal technical scheme provided by the invention: described ray detector A (18) receives the described middle energy gamma ray spectrum signal through coal sample; Described ray detector B (19) receives the described low-energy gamma ray spectrum signal through coal sample; Described silicon drifting detector (8) collects the characteristic X-ray that described low-energy gamma radiation exposure excites iron in coal sample, calcium, aluminium;
Multiple tracks data analysis spectrometer (9) receives described low-energy gamma ray and middlely to go forward side by side row relax by the characteristic X-ray of iron, calcium and aluminium in the spectral signal of gamma ray and coal sample;
Signal after multiple tracks data analysis spectrometer (9) processes by master control system (23) is transferred to data processing by signal transmission system (26) and separates spectra system (27), data processing and solution spectra system (27) utilize low-energy gamma to detect the change of ash component in coal sample, the mass density that measures of gamma the impact brought due to Coal Quality variable density can be revised by middle, by X-fluorescence technology for detection to iron calcium content compensate the impact on ash content because coal type change brings, obtain the iron calcium content in coal sample, data processing and solution spectra system (27) are by calcium iron content, the change of low-energy gamma ray and the change of middle energy gamma are as input quantity, calculate the ash content of same batch coal sample, and carry out Real time displaying by display system (28).
The beneficial effect of a kind of multiple-point coal ash pick-up unit provided by the invention comprises:
1, the present invention devises a continuous automatic unloading apparatus for ash, and within measuring period, central axis is visited by measuring axis source in uniformly continous ground, realizes the multi-shot continuous measure of ash content, improves the representativeness of measurement;
2, dual intensity gamma-ray emission source is arranged in different shielding protection follower respectively, and collimating apparatus is set respectively, and correspondence arranges two detectors, can natural ray be reduced, impact that ray scattering brings, and overcome middle can gamma ray and the mutual interference of low-energy gamma ray;
What 3, utilize pull baffle controls coal to measure in batches dual intensity gamma ray is measured is the coal sample of same batch;
4, the coal sample storehouse of the present invention's design is double wall funnel type, can design and guarantee that low energy and middle energy gamma radiation line have respective best material thickness;
5, the low-energy gamma source Am241 of the present invention's design had both served as low-energy gamma source to detect the absorption of high Z element ash content in coal, served as again the excitaton source of X-fluorescence;
6, the present invention designs the impact that the iron calcium content obtained above utilization compensates the low-energy gamma ash content response brought due to coal type change, thus under enabling this product be suitable for the changeable complicated occasion of coal, effectively raises the accuracy of measurement;
7, the present invention can be applied to entrance coal automobile and carrys out coal sampling and automatically fast detect and put, and does not make bypass belt, only directly slightly makes structural modification in the rear end of sampling receptacle, can install detection.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of multiple-point coal ash pick-up unit provided by the invention;
Fig. 2 is the structural representation of the embodiment of gamma-ray source provided by the invention;
Wherein 1 is automatic unloading valve; 2 for measuring position entrance; 3 for measuring position outlet; 4 is coal sample storehouse A; 5 is coal sample storehouse B; 6 is baffle plate A; 7 is baffle plate B; 8 is silicon drifting detector; 9 is multiple tracks data analysis spectrometer; 10 is middle energy gamma ray source Cs-137; 11 for low-energy gamma source Am-24112 be source protection body A; 13 is source protection body B; 14 is emissive plastic glazing A; 15 is emissive plastic glazing B; 16 is collimating aperture A; 17 is collimating aperture B; 18 is ray detector A; 19 is ray detector B; 20 is amplifier A; 21 is amplifier B; 22 is amplifier C; 23 is master control system; 24 is power supply; 25 is coal flow control system; 26 is signal transmission system; 27 is data processing and solution spectra system; 28 is display system.
Embodiment
As shown in Figure 1, the structural representation of the embodiment of a kind of multiple-point coal ash pick-up unit provided by the invention, from figure mono-, pick-up unit comprises container, detecting device and automatically controlled machine, and automatically controlled machine controls detecting device and container.
Container comprises coal sample storehouse, baffle plate and automatic unloading valve 1.
Coal sample storehouse is funnel type, be provided with above coal sample storehouse and measure position entrance 2, connect Sampling Machine and abandon sample outlet, be provided with below and measure position outlet 3, connect automatic unloading valve 1, the axis in coal sample storehouse is the line direction at infundibulate coal sample storehouse upper bottom surface and bottom surface center, and coal sample storehouse comprises coal sample storehouse A4 and coal sample storehouse B5, coal sample storehouse A4 and coal sample storehouse B5 and arranges from top to bottom along coal sample storehouse axial direction.Further, coal sample storehouse A4 is identical with the volume of coal sample storehouse B5, and cross-sectional area is greater than the cross-sectional area of coal sample storehouse B5, and height is lower than the height of coal sample storehouse B5.
Baffle plate is vertical with the axial direction in coal sample storehouse, comprises the baffle plate A6 that is positioned in the middle of coal sample storehouse A4 and coal sample storehouse B5 and under being positioned at coal sample storehouse B5, planar survey position exports the baffle plate B7 at 3 places.
Automatic unloading valve 1 is connected with coal sample storehouse B5, and automatic unloading valve is also known as rigid wheel batcher, and it relies on the Action of Gravity Field of material and the positive action of batcher working mechanism, is drawn off by the material in storehouse also to feed in next device of people to go continuous uniform.This automatic unloading valve 1 is star-shaped ash unloading valve, forms primarily of housing, impeller and end cap.Speed reduction unit, transmission shaft, impeller combine as a whole, reliable operation Portable energy-saving.Because the bearing of this machine and reductor are all outwardly, dust can be avoided to get into bearing and large granular materials stuck phenomenon.Rotated by shaft coupling impeller by reducing motor during work, the material of housing upper is evenly taken to bottom, by next device, material is seen off.Control speed and the angle of each rotation of motor, control the coal down maneuver in barrel, tie detector completes multipoint mode continuous coverage; If control motor slowly to rotate continuously, orthoscopic continuous coverage can be realized as effective.
Detecting device comprises gamma-ray source, ray detector, silicon drifting detector 8 and multiple tracks data analysis spectrometer 9, and gamma-ray source is positioned at the side in coal sample storehouse, and ray detector and silicon drifting detector 8 are positioned at the opposite side in coal sample storehouse.
The concrete structure of gamma-ray source as shown in Figure 2, as shown in Figure 2, a kind of gamma-ray source provided by the invention comprises superposed middle energy gamma ray source Cs-13710 and is positioned at the low-energy gamma source Am-24111 of bottom, middle energy gamma ray source Cs-13710 and low-energy gamma source Am-24111 be positioned in source protection body A12 and source protection body B13 respectively, the material of main part of source protection body is plumbous, shell material used is all carbon contents is 0.10%, silicone content is 0.08%, Fe content is 0.065%, phosphorus content is 0.030%, sulfur content is 0.018%, chromium content is 15.6%, surplus is the reasonable offer of iron, described percentage is percent by weight.
Two emissive plastic glazing A14 and emissive plastic glazing B15 and two collimating aperture A16 and collimating aperture B17 is also respectively equipped with in source protection body A12 and source protection body B13, middle energy gamma ray source Cs137 and low-energy gamma source Am241 be positioned in collimating aperture A16 and collimating aperture B 17 respectively, the center of gamma ray source is in the central axial direction of collimating aperture A, the hole depth of described collimating aperture A16 is 7cm, and the hole depth of collimating aperture B 17 is 5cm.
The gamma-ray photon of middle energy gamma ray source Cs-13710 transmitting passes through the coal sample in collimating aperture A16 irradiation coal sample storehouse A4 through lightweight emissive plastic glazing A14, the gamma-ray photon of low-energy gamma source Am-24111 transmitting passes lightweight emissive plastic glazing B15 by the coal sample in collimating aperture B17 irradiation coal sample storehouse B5.
Ray detector comprises superposed ray detector A18 and is positioned at the ray detector B19 of bottom, ray detector A18 and ray detector B19 is corresponding respectively with the position of the energy gamma ray source Cs-13710 and low-energy gamma source Am-24111 being arranged in coal sample storehouse opposite side, ray detector A18 receives through energy gamma ray in the coal sample in the A4 of coal sample storehouse, and ray detector B19 receives the low-energy gamma ray through the coal sample in the B5 of coal sample storehouse.
Ray detector is NaI scintillation detector or lanthanum bromide detector, ray detector A18 is connected with amplifier A20, ray detector B19 is connected with amplifier B21, amplifier A20 and amplifier B21 are connected with a road of the input end in multiple tracks data analysis spectrometer 9 respectively, and amplifier is photomultiplier.
Low-energy gamma source Am-24111 is irradiated on the coal sample sample of coal sample storehouse B5, excite the feature X-fluorescence of the iron in coal sample, calcium, aluminium simultaneously, utilize the characteristic X-ray that silicon drifting detector 8 excites to gather low-energy gamma source Am-24111, silicon drifting detector 8 is connected to another road of multiple tracks data analysis spectrometer 9 input end by amplifier C22, and amplifier is photomultiplier.
Multiple tracks data analysis spectrometer 9 is connected with silicon drifting detector 8 with ray detector A18, ray detector B19 with amplifier C22 respectively by amplifier A20, amplifier B21, be used for recording low-energy gamma and middle can the characteristic X-ray spectrum of iron, calcium and aluminium in the spectral signal of gamma and coal sample, the output terminal of multiple tracks data analysis spectrometer 9 is connected with automatically controlled machine.
In concrete operations:
Step S1, coal sample A enter the A4 of coal sample storehouse from measuring position entrance 2, and middle energy gamma ray source Cs-13710 irradiates the coal sample A in the A4 of coal sample storehouse by collimating aperture A16, and ray detector A18 receives through energy gamma ray in the coal sample A in the A4 of coal sample storehouse;
Step S2, baffle plate A6 extracts out, coal sample A is made to enter in the B5 of coal sample storehouse, the coal sample backboard A6 that unstows sends original position back to, coal sample B enters coal sample storehouse A4 from measurement position entrance 2, middle energy gamma ray source Cs-13710 irradiates the coal sample B in the A4 of coal sample storehouse by collimating aperture A16, ray detector A18 receives through energy gamma ray in the coal sample B in the A4 of coal sample storehouse, low-energy gamma source Am-24111 irradiates the coal sample A in the B5 of coal sample storehouse by collimating aperture B17, and ray detector B16 receives through energy gamma ray in the coal sample A in the B5 of coal sample storehouse;
Step S3, baffle plate B7 extracts out, coal sample A is transported by Automatic continuous unloading valve through measuring position outlet 3, coal sample after unstowing automatically pull gear B7 send original position back to, baffle plate A6 extracts out, coal sample B enters coal sample storehouse B5 and measures, and the coal sample backboard A6 that unstows sends original position back to, and coal sample 3 enters coal sample storehouse A4 from measurement position entrance 2.
Step S4, cycling step 3, measures the coal sample of different batches successively respectively.
Wherein, the measurement data of coal sample of same batch carries out operation result of measurement as one group of data.
Automatically controlled machine comprises master control system 23, power supply 24, coal flow control system 25, signal transmission system 26, data processing and separates spectra system 27 and display system 28, and wherein master control system 23 controls coal flow control system 25, signal transmission system 26, data processing and separates spectra system 27 and display system 28.
Coal flow control system 25 be used for control baffle plate A6 and baffle plate B7 extraction and send original position back to, the Measuring Time that coal sample is set can be needed to be 1-2 minute according to measurement, and start automatic unloading valve 1, make coal sample within measuring period continuous uniform by measure axis, realize the continuous coverage of coal sample.
Automatic unloading valve 1 and speed reduction unit and reducing motor form unloading valve system, and speed reduction unit and reducing motor control by coal flow control system 25.
Ray detector A18 receives through energy gamma ray spectrum signal in coal sample; Ray detector B19 receives the low-energy gamma ray spectrum signal through coal sample; Silicon drifting detector 8 collects the characteristic X-ray that low-energy gamma radiation exposure excites iron in coal sample, calcium, aluminium.
Multiple tracks data analysis spectrometer 9 receives low-energy gamma ray and middlely to go forward side by side row relax by the characteristic X-ray of iron, calcium and aluminium in the spectral signal of gamma ray and coal sample.
Signal after multiple tracks data analysis spectrometer 9 processes by master control system 23 is transferred to data processing by signal transmission system 26 and separates spectra system 27, data processing and solution spectra system 27 pairs of data process, low-energy gamma is utilized to detect the change of ash component in coal, the mass density that measures of gamma the impact brought due to Coal Quality variable density can be revised by middle, by X-fluorescence technology for detection to iron calcium content compensate the impact on ash content because coal type change brings, obtain the iron calcium content in coal sample, data processing and solution spectra system 27 are by calcium iron content, the change of low-energy gamma ray and the change of middle energy gamma are as input quantity, utilize neural-network learning model, in conjunction with nonlinear least square method technology, unceasing study and memory, finally provide relatively accurate ash content, and carry out Real time displaying by display system 28 and survey parameter.
The multi-shot continuous measure of ash content, the spot measurement effectively avoiding traditional dual intensity gamma technology to the problem of coal sample sample representativeness difference, as following table table one is depicted as the repetitive measurement Comparative result table of two kinds of coal samples tradition Ash analysers and multipoint mode Ash analyser provided by the invention.
Table one: the repetitive measurement Comparative result table of two kinds of coal sample tradition Ash analysers and multipoint mode Ash analyser
Although be described in detail example of the present invention with reference to the accompanying drawings above, be not limited only to this embodiment, various equivalent, the deformation process that those skilled in the art carries out according to this concrete technical scheme, also within protection scope of the present invention.
Claims (10)
1. a multiple-point coal ash pick-up unit, comprises container, detecting device and automatically controlled machine, it is characterized in that,
Described container comprises coal sample storehouse, baffle plate and automatic unloading valve (1);
Described coal sample storehouse is infundibulate, comprises coal sample storehouse A (4) and coal sample storehouse B (5) that described infundibulate coal sample storehouse axially sets gradually from top to bottom;
Described baffle plate is axial vertical with described coal sample storehouse, comprises baffle plate A (6) and baffle plate B (7), lays respectively between described coal sample storehouse A (4) and coal sample storehouse B (5) and below coal sample storehouse B (5);
Described automatic unloading valve (1) is connected with described coal sample storehouse B (5);
Described detecting device comprises gamma-ray source, ray detector, silicon drifting detector (8) and multiple tracks data analysis spectrometer (9);
Described gamma-ray source comprises middle energy gamma ray source Cs-137 (10) and low-energy gamma source Am-241 (11); Described ray detector comprises ray detector A (18) and ray detector B (19); The gamma-ray photon that described middle energy gamma ray source Cs-137 (10) is launched irradiates the coal sample in coal sample storehouse A (4), can be received by ray detector A (18) by gamma ray through in coal sample; The gamma-ray photon that described low-energy gamma source Am-241 (11) is launched irradiates the coal sample in coal sample storehouse B (5), and the low-energy gamma ray through coal sample is received by ray detector B (19);
Described ray detector A (18), ray detector B (19) and the output terminal of silicon drifting detector (8) are connected the input end of described multiple tracks data analysis spectrometer (9); Output terminal, the described baffle plate of described multiple tracks data analysis spectrometer (9) are connected described automatically controlled machine respectively with described automatic unloading valve (1).
2. a kind of multiple-point coal ash pick-up unit as claimed in claim 1, it is characterized in that, described coal sample storehouse A (4) is identical with the volume of described coal sample storehouse B (5), described coal sample storehouse A (4) cross-sectional area is greater than the cross-sectional area of described coal sample storehouse B (5), and the height of described coal sample storehouse A (4) is lower than the height of described coal sample storehouse B (5).
3. a kind of multiple-point coal ash pick-up unit as claimed in claim 1, it is characterized in that, described coal sample storehouse A (4) upper bottom surface is provided with and connects measurement position entrance (2) that Sampling Machine abandons sample outlet, and described coal sample storehouse B (5) bottom surface is provided with measurement position outlet (3) connecting automatic unloading valve (1).
4. a kind of multiple-point coal ash pick-up unit as claimed in claim 1, it is characterized in that, described middle energy gamma ray source Cs-137 (10) and described low-energy gamma source Am-241 (11) are positioned in source protection body A (12) and source protection body B (13) respectively;
Emissive plastic glazing A (14), emissive plastic glazing B (15), collimating aperture A (16) and collimating aperture B (17) is respectively equipped with in source protection body A (12) and source protection body B (13),
Described middle energy gamma ray source Cs137 be positioned in collimating aperture A (16), and its center is in the central axial direction of described collimating aperture A (16), and the hole depth of described collimating aperture A (16) is 7cm;
Described low-energy gamma source Am241 is positioned in the collimating aperture B (17) in source protection body B (17), and its center is in the central axial direction of collimating aperture B (17), and the hole depth of described collimating aperture B (17) is 5cm;
The gamma-ray photon that middle energy gamma ray source Cs-137 (10) is launched irradiates the inner coal sample in coal sample storehouse A (4) through lightweight emissive plastic glazing A (14) by collimating aperture A (16);
The gamma-ray photon that low-energy gamma source Am-241 (11) is launched irradiates the inner coal sample in coal sample storehouse B (5) through lightweight emissive plastic glazing B (15) by collimating aperture B (17).
5. a kind of multiple-point coal ash pick-up unit as claimed in claim 4, it is characterized in that, the material of main part in described source protection body A (12) and source protection body B (13) is all plumbous, shell material used is all carbon contents is 0.10%, silicone content is 0.08%, Fe content is 0.065%, phosphorus content is 0.030%, sulfur content is 0.018%, chromium content is 15.6%, surplus is the reasonable offer of iron, and described percentage is percent by weight.
6. a kind of multiple-point coal ash pick-up unit as claimed in claim 1, it is characterized in that, described ray detector is NaI scintillation detector or lanthanum bromide detector, described ray detector A (18), the output terminal of ray detector B (19) and described silicon drifting detector (8) is respectively by amplifier A (20), amplifier B (21) is connected with the input end of multiple tracks data analysis spectrometer (9) with amplifier C (22), described amplifier A (20), amplifier B (21) and amplifier C (22) is photomultiplier.
7. a kind of multiple-point coal ash pick-up unit as claimed in claim 1, it is characterized in that, described automatically controlled machine comprises master control system (23), power supply (24) and the coal flow control system (25) controlled by described master control system (23), signal transmission system (26), data processing and separates spectra system (27) and display system (28);
The output terminal of described multiple tracks data analysis spectrometer (9) connects the described signal transmission system (26) of described automatically controlled machine;
Described container connects the coal flow control system (25) of described automatically controlled machine.
8. a kind of multiple-point coal ash pick-up unit as claimed in claim 7, is characterized in that,
Described coal flow control system (25) controls the extraction of baffle plate A (6) and baffle plate B (7) and sends original position back to, control to start automatic unloading valve (1), the Measuring Time controlling to arrange coal sample is 1-2 minute.
9. a kind of multiple-point coal ash pick-up unit as claimed in claim 7, is characterized in that, described automatic unloading valve, speed reduction unit and reducing motor composition unloading valve system, and coal flow control system controls described speed reduction unit and described reducing motor; Described automatic unloading valve is star-shaped ash unloading valve, comprises housing, impeller and end cap; Described reducing motor drives described wheel rotation by shaft coupling, and the material of described housing upper is evenly taken to bottom.
10. a kind of multiple-point coal ash pick-up unit as claimed in claim 7, is characterized in that,
Described ray detector A (18) receives the described middle energy gamma ray spectrum signal through coal sample; Described ray detector B (19) receives the described low-energy gamma ray spectrum signal through coal sample; Described silicon drifting detector (8) collects the characteristic X-ray that described low-energy gamma radiation exposure excites iron in coal sample, calcium, aluminium;
Multiple tracks data analysis spectrometer (9) receives described low-energy gamma ray and middlely to go forward side by side row relax by the characteristic X-ray of iron, calcium and aluminium in the spectral signal of gamma ray and coal sample;
Signal after multiple tracks data analysis spectrometer (9) processes by master control system (23) is transferred to data processing by signal transmission system (26) and separates spectra system (27), data processing and solution spectra system (27) utilize low-energy gamma to detect the change of ash component in coal sample, the mass density that measures of gamma the impact brought due to Coal Quality variable density can be revised by middle, by X-fluorescence technology for detection to iron calcium content compensate the impact on ash content because coal type change brings, obtain the iron calcium content in coal sample, data processing and solution spectra system (27) are by calcium iron content, the change of low-energy gamma ray and the change of middle energy gamma are as input quantity, calculate the ash content of same batch coal sample, and carry out Real time displaying by display system (28).
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| CN105424534A (en) * | 2015-12-16 | 2016-03-23 | 中国神华能源股份有限公司 | Device and method for rapidly measuring ash content of coal |
| CN105806866B (en) * | 2016-05-27 | 2018-09-28 | 长沙开元仪器股份有限公司 | A kind of automatic sampling for X-fluorescence on-line testing abandons sampling device |
| CN109884686B (en) * | 2019-03-18 | 2020-12-11 | 中国原子能科学研究院 | Radioactive source position detection device |
| CN110133007B (en) * | 2019-04-17 | 2020-01-14 | 中国建材检验认证集团股份有限公司 | Coal consumption on-line metering system |
| CN110749613A (en) * | 2019-11-27 | 2020-02-04 | 湖北富邦科技股份有限公司 | Method for on-line analysis of phosphate ore |
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