CN102749345A - 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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- CN102749345A CN102749345A CN2012102025108A CN201210202510A CN102749345A CN 102749345 A CN102749345 A CN 102749345A CN 2012102025108 A CN2012102025108 A CN 2012102025108A CN 201210202510 A CN201210202510 A CN 201210202510A CN 102749345 A CN102749345 A CN 102749345A
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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 multipoint mode coal ash content detector.
Background technology
The ash content of coal measuring instrument comprises laboratory Sample detector and on-line detector, and the laboratory detector measurement result of implementing sample detection is accurate, but because of detection architecture lags behind, is separated with the robotization control of producing.
In various Measurement and analysis, utilize the gamma rays technology as a routine techniques, utilize strong this advantage of its penetrability, gamma rays just is used to the ash content in metal nondestructive examination and the coal many years ago.In recent years, the nuclear measuring technique that gamma rays is relevant is used more extensive, and for example it is in the application in fields such as cement, coal, ore.
Tradition dual intensity gamma rays mainly contains combined type and separate type two big class formation types at the ash content detector.Online its structure of ash content detector of combined type dual intensity gamma rays is that the dual intensity gamma ray radiation source is installed in the same shielding follower; Survey collection by a detector; Though this structure has the advantage of favourable identity; But be installed on middle can gamma rays the interference by low energy gamma rays measurement existence in the same shielding follower, thereby influence the accuracy of its measurement; The dual intensity gamma ray radiation source is arranged at respectively in the different shielding protection followers, and correspondence is provided with two detectors, structurally overcome middle can gamma rays to the interference of low energy gamma rays, the technical matters of homogeneity difference has but appearred.
Tradition dual intensity gamma rays another technical problem underlying of ash content detector be above-mentioned conventional online ash content detector all do not take into account the low energy gamma rays with middle can gamma rays different aspect the optimum measurement thickness; Because the penetration capacity of the gamma rays of two groups of different-energies differs greatly, if cause coal sample thickness to satisfy effective projection of low energy gamma rays, intensity that can gamma rays in then can't making before and after transmission by enough obvious variation; Cause measuring accuracy not high; And if the intensity of ability gamma rays has enough obvious variation in the assurance before and after projection, the thickness of just necessary increase coal sample, but so; Can be with low energy gamma rays hyperabsorption; Low energy gamma rays after the transmission that detects is low excessively, receives the influence of background and fluctuation effect excessive, causes bigger measuring error.
Summary of the invention
A kind of multipoint mode coal ash content detector provided by the invention comprises container, detecting device and automatically controlled machine,
Said container comprises coal sample storehouse, baffle plate and automatic ash-discharging valve (1);
Said coal sample storehouse is an infundibulate, comprises the coal sample storehouse A (4) and the coal sample storehouse B (5) that set gradually from top to bottom on said infundibulate coal sample storehouse axially;
Said baffle plate is axial vertical with said coal sample storehouse, comprises baffle plate A (6) and baffle plate B (7), lay respectively between said coal sample storehouse A (4) and the coal sample storehouse B (5) and coal sample storehouse B (5) below;
Said automatic ash-discharging valve (1) is connected with said coal sample storehouse B (5);
Said detecting device comprises gamma-ray source, ray detector, silicon drifting detector (8) and multiple tracks data analysis spectrometer (9);
Ability gamma source Cs-137 (10) and low energy gamma source Am-241 (11) during said gamma-ray source comprises; Said ray detector comprises ray detector A (18) and ray detector B (19); Coal sample in said among the gamma photons irradiation coal sample storehouse A (4) of ability gamma source Cs-137 (10) emission, seeing through the middle of coal sample can be received by ray detector A (18) by gamma rays; Coal sample among the gamma photons irradiation coal sample storehouse B (5) of said low energy gamma source Am-241 (11) emission, the low energy gamma rays that sees through the coal sample is received by ray detector B (19);
Said ray detector A (18), ray detector B (19) and the output terminal of silicon drifting detector (8) are connected the input end of said multiple tracks data analysis spectrometer (9); The output terminal of said multiple tracks data analysis spectrometer (9), said baffle plate and said automatic ash-discharging valve (1) are connected said automatically controlled machine respectively.
In first optimal technical scheme provided by the invention: said coal sample storehouse A (4) is identical with the volume of said coal sample storehouse B (5); Said coal sample storehouse A (4) cross-sectional area is greater than the cross-sectional area of said coal sample storehouse B (5), and the height of said coal sample storehouse A (4) is lower than the height of said coal sample storehouse B (5).
In second optimal technical scheme provided by the invention: said coal sample storehouse A (4) upper bottom surface is provided with and connects the measurement position inlet (2) that Sampling Machine is abandoned the appearance outlet, and said coal sample storehouse B (5) bottom surface is provided with the measurement position outlet (3) that connects automatic ash-discharging valve (1).
In the 3rd optimal technical scheme provided by the invention: ability gamma source Cs-137 (10) and said low energy gamma source Am-241 (11) are positioned over respectively in source protection body A (12) and the source protection body B (13) in said;
Be respectively equipped with emissive plastic glazing A (14), emissive plastic glazing B (15), collimating aperture A (16) and collimating aperture B (17) in source protection body A (12) and the source protection body B (13),
Can be positioned in the collimating aperture (A) by gamma source Cs137 in said, its center is on the central axial direction of said collimating aperture (A), and the hole depth of said collimating aperture (A) is 7cm;
Said low energy gamma source Am241 is positioned in the collimating aperture (B) in the source protection body (B), and its center is on the central axial direction of collimating aperture (B), and the hole depth of said collimating aperture (B) is 5cm;
The gamma photons of middle ability gamma source Cs-137 (10) emission is passed the coal sample of lightweight emissive plastic glazing A (14) through collimating aperture A (16) irradiation coal sample storehouse A (4) lining;
The gamma photons of low energy gamma source Am-241 (11) emission is passed the coal sample of lightweight emissive plastic glazing B (15) through collimating aperture B (17) irradiation coal sample storehouse B (5) lining.
In the 4th optimal technical scheme provided by the invention: the material of main part of said source protection body A (12) and source protection body B (13) all is plumbous; The used material of shell all is that carbon content is 0.10%, silicone content is 0.08%, manganese content is 0.065%, phosphorus content is 0.030%, sulfur content is 0.018%, chromium content is 15.6%, surplus is the alloy preparation of iron, and described percentage is percent by weight.
In the 5th optimal technical scheme provided by the invention: said ray detector is NaI scintillation detector or lanthanum bromide detector; The output terminal of said ray detector A (18), ray detector B (19) and said silicon drifting detector (8) is connected with the input end of multiple tracks data analysis spectrometer (9) through amplifier A (20), amplifier B (21) and amplifier C (22) respectively, and said amplifier A (20), amplifier B (21) and amplifier C (22) are photomultiplier.
In the 6th optimal technical scheme provided by the invention: said automatically controlled machine comprises master control system (23), power supply (24) and by coal flow control system (25), signal transmission system (26), the data processing of said master control system (23) control and separate spectra system (27) and display system (28);
The output terminal of said multiple tracks data analysis spectrometer (9) connects the said signal transmission system (26) of said automatically controlled machine;
Said container connects the coal flow control system (25) of said automatically controlled machine.
In the 7th optimal technical scheme provided by the invention: said coal flow control system (25) is controlled the extraction of baffle plate A (6) and baffle plate B (7) and is sent original position back to; Control starts automatic ash-discharging valve (1), and the Measuring Time of control setting coal sample is 1-2 minute.
In the 8th optimal technical scheme provided by the invention: said automatic ash-discharging valve, speed reduction unit and reducing motor are formed the unloading valve system, and the coal flow control system is controlled said speed reduction unit and said reducing motor; Said automatic ash-discharging valve is a star-shaped ash unloading valve, comprises housing, impeller and end cap; Said reducing motor drives said wheel rotation through shaft coupling, evenly takes the material on said housing top to bottom.
In the 9th optimal technical scheme provided by the invention: said ray detector A (18) receives the said middle ability gamma ray spectrum signal that sees through the coal sample; Said ray detector B (19) receives the said low energy gamma ray spectrum signal that sees through the coal sample; Said silicon drifting detector (8) is collected the characteristic X-ray that said low energy gamma-ray irradiation excites iron, calcium, aluminium in the coal sample;
Multiple tracks data analysis spectrometer (9) receives the characteristic X-ray of iron, calcium and aluminium in said low energy gamma rays and middle spectral signal and the coal sample that can gamma rays and handles;
Signal after master control system (23) is handled multiple tracks data analysis spectrometer (9) is transferred to data processing and separates spectra system (27) through signal transmission system (26); Data processing and separate spectra system (27) and utilize the low energy gamma to detect the variation of ash component in the coal sample; Mass density through middle ability gamma measures is revised because the influence that the Coal Quality variable density is brought; Compensate because coal changes the influence to ash content that brings through the detected iron calcium content of X fluorescent technique; Obtain the iron calcium content in the coal sample; Data processing and separate variation and middle can gamma change as input quantity of spectra system (27) through calcium iron content, low energy gamma rays calculates the ash content of same batch coal sample, and carries out online demonstration through display system (28).
The beneficial effect of a kind of multipoint mode coal ash content detector provided by the invention comprises:
1, the present invention has designed a continuous automatic unloading apparatus for ash, in measuring period, evenly visits central axis through the measurement axis line source continuously, realizes the multiple spot continuous coverage of ash content, has improved the representativeness of measuring;
2, the dual intensity gamma ray radiation source is arranged at respectively in the different shielding protection followers; And collimating apparatus is set respectively; And correspondence is provided with two detectors, can reduce the influence that natural ray, ray scattering bring, and overcome middle can gamma rays and the mutual interference of low energy gamma rays;
3, utilize pull baffle controls coal to measure in batches to make that the dual intensity gamma rays measures is same batch coal sample;
4, the coal sample storehouse of the present invention's design is the double wall funnel type, can design and guarantee that low energy and middle ability gamma radiation line have best material thickness separately;
5, the low energy gamma source Am241 of the present invention's design had both served as the absorption that the low energy gamma source detects high Z element ash content in the coal, served as the excitaton source of X fluorescence again;
6, the present invention designs that resulting iron calcium content above the utilization compensates because coal changes the influence of the low energy gamma ash content response that brings, thereby makes this product can be suitable for effectively raising the accuracy of measurement under the changeable complicated occasion of coal;
7, the present invention can be applied to admission coal automobile and comes the coal automatic fast detecting of taking a sample to put, and does not make the bypass belt, only directly makes structural modification slightly in the rear end of sampling receptacle, gets final product installation and measuring.
Description of drawings
Fig. 1 is the structural representation of the embodiment of multipoint mode coal ash content detector provided by the invention;
Fig. 2 is the structural representation of the embodiment of gamma-ray source provided by the invention;
Wherein 1 is the automatic ash-discharging valve; 2 for measuring the position inlet; 3 for measuring the 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 the silicon drifting detector; 9 is multiple tracks data analysis spectrometer; 10 is middle ability gamma source Cs-137; 11 is that low energy gamma source Am-24112 is 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 the coal flow control system; 26 is signal transmission system; 27 are data processing and separate spectra system; 28 is display system.
Embodiment
As shown in Figure 1, the structural representation of the embodiment of a kind of multipoint mode coal ash content detector provided by the invention can be known by figure one, and pick-up unit comprises container, detecting device and automatically controlled machine, automatically controlled machine control detection device and container.
Container comprises coal sample storehouse, baffle plate and automatic ash-discharging valve 1.
The coal sample storehouse is a funnel type; Be provided with above the coal sample storehouse and measure position inlet 2, connect Sampling Machine and abandon the appearance outlet, be provided with below and measure position outlet 3; Connect automatic ash-discharging valve 1; The axial of coal sample storehouse is the line direction at infundibulate coal sample storehouse upper bottom surface and bottom surface center, and the coal sample storehouse comprises coal sample storehouse A4 and coal sample storehouse B5, and axial direction is provided with from top to bottom along the coal sample storehouse for coal sample storehouse A4 and coal sample storehouse B5.Further, coal sample storehouse A4 is identical with the volume of coal sample storehouse B5, and cross-sectional area highly is lower than the height of coal sample storehouse B5 greater than the cross-sectional area 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 the coal sample storehouse B5 and is positioned at the baffle plate B7 that planar survey position under the B5 of coal sample storehouse exports 3 places.
Automatic ash-discharging valve 1 is connected with coal sample storehouse B5, and the automatic ash-discharging valve is also claimed the rigid wheel batcher, and it relies on the action of gravity of material and the positive action of batcher working mechanism, and the material in the storehouse is drawn off and feeds equably continuously in next device of people and go.This automatic ash-discharging valve 1 is a star-shaped ash unloading valve, mainly is made up of housing, impeller and end cap.Speed reduction unit, transmission shaft, impeller combine as a whole, and reliable operation is light energy-conservation.Because the bearing and the reductor of this machine all are outside protrusions, can avoid dust to get into bearing and large granular materials stuck phenomenon.Rotate through the shaft coupling impeller by reducing motor during work, evenly take the material on housing top to bottom, see material off by next device.The speed and the angle of each rotation of control motor are controlled the coal down maneuver in the barrel, and tie detector is accomplished the multipoint mode continuous coverage; If the control motor slowly rotates continuously, can realize the orthoscopic continuous coverage 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 a 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 is as shown in Figure 2; Can know by Fig. 2; A kind of gamma-ray source provided by the invention comprises superposed middle ability gamma source Cs-13710 and the low energy gamma source Am-24111 that is positioned at the bottom; Middle ability gamma source Cs-13710 and low energy gamma source Am-24111 are positioned over respectively in source protection body A12 and the source protection body B13; The material of main part of source protection body is plumbous, and the used material of shell all is that carbon content is 0.10%, silicone content is 0.08%, manganese content is 0.065%, phosphorus content is 0.030%, sulfur content is 0.018%, chromium content is 15.6%, surplus is the alloy preparation of iron, and described percentage is percent by weight.
Also be respectively equipped with two emissive plastic glazing A14 and emissive plastic glazing B15 and two collimating aperture A16 and collimating aperture B17 in source protection body A12 and the source protection body B13; Middle ability gamma source Cs137 and low energy gamma source Am241 are positioned over respectively among collimating aperture A 16 and the collimating aperture B 17; The center of gamma source is on the central axial direction of collimating aperture A; The hole depth of said collimating aperture A16 is 7cm, and the hole depth of collimating aperture B 17 is 5cm.
The gamma photons of middle ability gamma source Cs-13710 emission is passed lightweight emissive plastic glazing A14 through the coal sample in the collimating aperture A16 irradiation coal sample storehouse A4, and the gamma photons that low energy gamma source Am-241 11 launches is passed lightweight emissive plastic glazing B15 and passed through the coal sample in the collimating aperture B17 irradiation coal sample storehouse B5.
Ray detector comprises superposed ray detector A18 and the ray detector B19 that is positioned at the bottom; Ray detector A18 and ray detector B19 are corresponding respectively with the position of ability gamma source Cs-137 10 that is arranged in coal sample storehouse opposite side and low energy gamma source Am-241 11; Ray detector A18 receives the middle ability gamma rays of the coal sample that sees through in the A4 of coal sample storehouse, and ray detector B19 receives the low energy gamma rays that sees through the coal sample in the B5 of coal sample storehouse.
Ray detector is NaI scintillation detector or lanthanum bromide detector; Ray detector A18 links to each other with amplifier A20; Ray detector B19 links to each other with amplifier B21; Amplifier A20 and amplifier B21 respectively with multiple tracks data analysis spectrometer 9 in a road the linking to each other of input end, amplifier is a photomultiplier.
Low energy gamma source Am-241 11 shines on the coal sample sample of coal sample storehouse B5; Excite the characteristic X fluorescence of iron in the coal sample, calcium, aluminium simultaneously; Utilize silicon drifting detector 8 to gather the characteristic X-ray that low energy gamma source Am-24111 excites; Silicon drifting detector 8 is connected to another roads of multiple tracks data analysis spectrometer 9 input ends through amplifier C22, and amplifier is a photomultiplier.
Multiple tracks data analysis spectrometer 9 links to each other with ray detector A18, ray detector B19 and silicon drifting detector 8 respectively with amplifier C22 through amplifier A20, amplifier B21; Be used for writing down the characteristic X-ray spectrum of iron, calcium and aluminium in low energy gamma and middle spectral signal and the coal sample that can gamma, the output terminal of multiple tracks data analysis spectrometer 9 is connected with automatically controlled machine.
In concrete operations:
Step S1, coal sample A gets into the coal sample storehouse A4 from measuring position inlet 2, and middle ability gamma source Cs-13710 is through the coal sample A in the collimating aperture A16 irradiation coal sample storehouse A4, and ray detector A18 receives the middle ability gamma rays of the coal sample A that sees through in the A4 of coal sample storehouse;
Step S2; Baffle plate A6 extracts out; Coal sample A is got among the coal sample storehouse B5, and the coal sample backboard A6 that unstows sends original position back to, and coal sample B gets into coal sample storehouse A4 from measuring position inlet 2; Middle ability gamma source Cs-13710 is through the coal sample B in the collimating aperture A16 irradiation coal sample storehouse A4; Ray detector A18 receives the middle ability gamma rays of the coal sample B that sees through in the A4 of coal sample storehouse, and low energy gamma source Am-241 11 is through the coal sample A in the collimating aperture B17 irradiation coal sample storehouse B5, and ray detector B16 receives the middle ability gamma rays of the coal sample A that sees through in the B5 of coal sample storehouse;
Step S3; Baffle plate B7 extracts out, and a coal sample A process measurement outlet 3 is transported through automatically continuous unloading valve, and automatic pull retaining B7 sent original position back to after the coal sample was unstowed; Baffle plate A6 extracts out; Coal sample B gets into coal sample storehouse B5 and measures, and the coal sample backboard A6 that unstows sends original position back to, and coal sample 3 gets into coal sample storehouse A4 from measuring position inlet 2.
Step S4, cycling step 3 is measured the coal sample of different batches successively respectively.
Wherein, the measurement data of same batch coal sample is measured computing 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 that wherein master control system 23 is controlled coal flow control system 25, signal transmission system 26, data processing and separated spectra system 27 and display system 28.
Coal flow control system 25 is used for controlling the extraction of baffle plate A6 and baffle plate B7 and sending original position back to; Can it be 1-2 minute according to the Measuring Time that the measurement needs are provided with the coal sample; And start automatic ash-discharging valve 1; Make the coal sample in measuring period, pass through to measure axis continuously uniformly, realize the continuous coverage of coal sample.
Automatic ash-discharging valve 1 is formed the unloading valve system with speed reduction unit and reducing motor, and speed reduction unit and reducing motor are by 25 controls of coal flow control system.
Ray detector A18 receives the middle ability gamma ray spectrum signal that sees through the coal sample; Ray detector B19 receives the low energy gamma ray spectrum signal that sees through the coal sample; Silicon drifting detector 8 is collected the characteristic X-ray that the low energy gamma-ray irradiation excites iron, calcium, aluminium in the coal sample.
Multiple tracks data analysis spectrometer 9 receives the characteristic X-ray of iron, calcium and aluminium in low energy gamma rayss and middle spectral signal and the coal sample that can gamma rays and handles.
Signal after master control system 23 is handled multiple tracks data analysis spectrometer 9 is transferred to data processing and separates spectra system 27 through signal transmission system 26; Data processing and separate 27 pairs of data of spectra system and handle; Utilize the low energy gamma to detect the variation of ash component in the coal; Mass density through middle ability gamma measures is revised because the influence that the Coal Quality variable density is brought compensates because coal changes the influence to ash content that brings through the detected iron calcium content of X fluorescent technique, obtains the iron calcium content in the coal sample; Data processing and separate spectra system 27 variation and middle can the variation as input quantity by gamma through calcium iron content, low energy gamma rays; Utilize the neural network learning model, in conjunction with nonlinear least square method technology, constantly learning and memory; Provide relatively accurate ash content at last, and carry out the online demonstration parameter of surveying through display system 28.
The multiple spot continuous coverage of ash content; Effectively avoided the problem of the spot measurement of traditional dual intensity gamma technology, be depicted as the repeatedly measurement result contrast table of two kinds of coal sample tradition Ash analysers and multipoint mode Ash analyser provided by the invention like following table table one coal sample sample representativeness difference.
Table one: the repeatedly measurement result contrast table of two kinds of coal samples tradition Ash analyser and multipoint mode Ash analyser
Though more than according to accompanying drawing instance of the present invention is specified, be not limited only to this embodiment, those skilled in the art is according to this concrete technical scheme variously being equal to of carrying out, deformation process, also within protection scope of the present invention.
Claims (10)
1. a multipoint mode coal ash content detector comprises container, detecting device and automatically controlled machine, it is characterized in that,
Said container comprises coal sample storehouse, baffle plate and automatic ash-discharging valve (1);
Said coal sample storehouse is an infundibulate, comprises the coal sample storehouse A (4) and the coal sample storehouse B (5) that set gradually from top to bottom on said infundibulate coal sample storehouse axially;
Said baffle plate is axial vertical with said coal sample storehouse, comprises baffle plate A (6) and baffle plate B (7), lay respectively between said coal sample storehouse A (4) and the coal sample storehouse B (5) and coal sample storehouse B (5) below;
Said automatic ash-discharging valve (1) is connected with said coal sample storehouse B (5);
Said detecting device comprises gamma-ray source, ray detector, silicon drifting detector (8) and multiple tracks data analysis spectrometer (9);
Ability gamma source Cs-137 (10) and low energy gamma source Am-241 (11) during said gamma-ray source comprises; Said ray detector comprises ray detector A (18) and ray detector B (19); Coal sample in said among the gamma photons irradiation coal sample storehouse A (4) of ability gamma source Cs-137 (10) emission, seeing through the middle of coal sample can be received by ray detector A (18) by gamma rays; Coal sample among the gamma photons irradiation coal sample storehouse B (5) of said low energy gamma source Am-241 (11) emission, the low energy gamma rays that sees through the coal sample is received by ray detector B (19);
Said ray detector A (18), ray detector B (19) and the output terminal of silicon drifting detector (8) are connected the input end of said multiple tracks data analysis spectrometer (9); The output terminal of said multiple tracks data analysis spectrometer (9), said baffle plate and said automatic ash-discharging valve (1) are connected said automatically controlled machine respectively.
2. a kind of multipoint mode coal ash content detector as claimed in claim 1; It is characterized in that; Said coal sample storehouse A (4) is identical with the volume of said coal sample storehouse B (5); Said coal sample storehouse A (4) cross-sectional area is greater than the cross-sectional area of said coal sample storehouse B (5), and the height of said coal sample storehouse A (4) is lower than the height of said coal sample storehouse B (5).
3. a kind of multipoint mode coal ash content detector as claimed in claim 1; It is characterized in that; Said coal sample storehouse A (4) upper bottom surface is provided with and connects the measurement position inlet (2) that Sampling Machine is abandoned the appearance outlet, and said coal sample storehouse B (5) bottom surface is provided with the measurement position outlet (3) that connects automatic ash-discharging valve (1).
4. a kind of multipoint mode coal ash content detector as claimed in claim 1 is characterized in that, said middle ability gamma source Cs-137 (10) and said low energy gamma source Am-241 (11) are positioned over respectively in source protection body A (12) and the source protection body B (13);
Be respectively equipped with emissive plastic glazing A (14), emissive plastic glazing B (15), collimating aperture A (16) and collimating aperture B (17) in source protection body A (12) and the source protection body B (13),
Can be positioned among the collimating aperture A (16) by gamma source Cs137 in said, its center is on the central axial direction of said collimating aperture A (16), and the hole depth of said collimating aperture A (16) is 7cm;
Said low energy gamma source Am241 is positioned among the collimating aperture B (17) in the source protection body B (17), and its center is on the central axial direction of collimating aperture B (17), and the hole depth of said collimating aperture B (17) is 5cm;
The gamma photons of middle ability gamma source Cs-137 (10) emission is passed the coal sample of lightweight emissive plastic glazing A (14) through collimating aperture A (16) irradiation coal sample storehouse A (4) lining;
The gamma photons of low energy gamma source Am-241 (11) emission is passed the coal sample of lightweight emissive plastic glazing B (15) through collimating aperture B (17) irradiation coal sample storehouse B (5) lining.
5. a kind of multipoint mode coal ash content detector as claimed in claim 4; It is characterized in that; The material of main part of said source protection body A (12) and source protection body B (13) all is plumbous; The used material of shell all is that carbon content is 0.10%, silicone content is 0.08%, manganese content is 0.065%, phosphorus content is 0.030%, sulfur content is 0.018%, chromium content is 15.6%, surplus is the alloy preparation of iron, and described percentage is percent by weight.
6. a kind of multipoint mode coal ash content detector as claimed in claim 1; It is characterized in that; Said ray detector is NaI scintillation detector or lanthanum bromide detector; The output terminal of said ray detector A (18), ray detector B (19) and said silicon drifting detector (8) is connected with the input end of multiple tracks data analysis spectrometer (9) through amplifier A (20), amplifier B (21) and amplifier C (22) respectively, and said amplifier A (20), amplifier B (21) and amplifier C (22) are photomultiplier.
7. a kind of multipoint mode coal ash content detector as claimed in claim 1; It is characterized in that said automatically controlled machine comprises master control system (23), power supply (24) and by coal flow control system (25), signal transmission system (26), the data processing of said master control system (23) control and separate spectra system (27) and display system (28);
The output terminal of said multiple tracks data analysis spectrometer (9) connects the said signal transmission system (26) of said automatically controlled machine;
Said container connects the coal flow control system (25) of said automatically controlled machine.
8. a kind of multipoint mode coal ash content detector as claimed in claim 7 is characterized in that,
Said coal flow control system (25) is controlled the extraction of baffle plate A (6) and baffle plate B (7) and is sent original position back to, and control starts automatic ash-discharging valve (1), and the Measuring Time of control setting coal sample is 1-2 minute.
9. a kind of multipoint mode coal ash content detector as claimed in claim 7 is characterized in that, said automatic ash-discharging valve, speed reduction unit and reducing motor are formed the unloading valve system, and the coal flow control system is controlled said speed reduction unit and said reducing motor; Said automatic ash-discharging valve is a star-shaped ash unloading valve, comprises housing, impeller and end cap; Said reducing motor drives said wheel rotation through shaft coupling, evenly takes the material on said housing top to bottom.
10. a kind of multipoint mode coal ash content detector as claimed in claim 7 is characterized in that,
Said ray detector A (18) receives the said middle ability gamma ray spectrum signal that sees through the coal sample; Said ray detector B (19) receives the said low energy gamma ray spectrum signal that sees through the coal sample; Said silicon drifting detector (8) is collected the characteristic X-ray that said low energy gamma-ray irradiation excites iron, calcium, aluminium in the coal sample;
Multiple tracks data analysis spectrometer (9) receives the characteristic X-ray of iron, calcium and aluminium in said low energy gamma rays and middle spectral signal and the coal sample that can gamma rays and handles;
Signal after master control system (23) is handled multiple tracks data analysis spectrometer (9) is transferred to data processing and separates spectra system (27) through signal transmission system (26); Data processing and separate spectra system (27) and utilize the low energy gamma to detect the variation of ash component in the coal sample; Mass density through middle ability gamma measures is revised because the influence that the Coal Quality variable density is brought; Compensate because coal changes the influence to ash content that brings through the detected iron calcium content of X fluorescent technique; Obtain the iron calcium content in the coal sample; Data processing and separate variation and middle can gamma change as input quantity of spectra system (27) through calcium iron content, low energy gamma rays calculates the ash content of same batch coal sample, and carries out online demonstration through display system (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202510.8A CN102749345B (en) | 2012-06-19 | 2012-06-19 | Multipoint type detection apparatus for ash content of coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202510.8A CN102749345B (en) | 2012-06-19 | 2012-06-19 | Multipoint type detection apparatus for ash content of coal |
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| CN111175807A (en) * | 2020-01-09 | 2020-05-19 | 中国原子能科学研究院 | Automatic large-scale total gamma analyzer system |
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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 |
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| CN111175807A (en) * | 2020-01-09 | 2020-05-19 | 中国原子能科学研究院 | Automatic large-scale total gamma analyzer system |
| CN111175807B (en) * | 2020-01-09 | 2022-06-28 | 中国原子能科学研究院 | Automatic large-scale total gamma analyzer system |
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