CN1940544B - High-precision on-line ash content measuring unit - Google Patents
High-precision on-line ash content measuring unit Download PDFInfo
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- CN1940544B CN1940544B CN200610047919A CN200610047919A CN1940544B CN 1940544 B CN1940544 B CN 1940544B CN 200610047919 A CN200610047919 A CN 200610047919A CN 200610047919 A CN200610047919 A CN 200610047919A CN 1940544 B CN1940544 B CN 1940544B
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- gamma
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- ash content
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Abstract
A high accurate on-line measurement device of ash content consists of double energy gamma ray detection mechanism, data collection unit and data processing system. It is featured as hinging the first erection frame set with low energy gamma ray detection unit of said mechanism with the second erection frame set with intermediate energy gamma ray detection unit of said mechanism and fixing the two to be on included angle mode in certain degree.
Description
Technical field
What the present invention relates to is to utilize dual energy gamma ray to implement the online ash content detector of coke, ash content of coal analysis.
Background technology
Ature of coal ash content measuring instrument includes laboratory Sample detector and on-line detector.The laboratory detector measurement result of implementing sample detection is accurate, but because of testing result lags behind, is separated with the robotization control of producing.
The online ash content detector of existing dual energy gamma ray mainly contains combined type and separate type two big class formation types.Online its structure of ash content detector of combined type dual energy gamma ray is that the dual energy gamma ray radioactive 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 measurement existence in the same follower, thereby influence the accuracy of its measurement; With the online ash content detector of separate type that the dual energy gamma ray radioactive source is arranged in the different shielding protection followers respectively, correspondence is provided with two detectors; structurally overcome of the interference of middle energy gamma-rays, the technical matters of homogeneity difference but occurred low-energy.Another technical problem underlying be above-mentioned conventional online ash content sniffer all do not take into account low-energy with middle can gamma-rays different aspect the optimum measurement thickness, so may not obtain its ideal measurement result.In addition, variation, the granularity of the material shapes that occurs at any time in the belt transmission is irregular, composition is irregular etc., and objective factor all can cause great influence to its measurement, causes it to push away low, the poor sensitivity of true property.Once more, conventional online ash content measuring instrument is structurally gone back ubiquity, and the detection coverage rate little, and measurement result is subject to the wander off technical matters of influence of belt.
Summary of the invention
Thereby the goal of the invention of patented claim of the present invention is to provide a kind of has homogeneity and simultaneity sensing point, take into account dual energy gamma ray separately optimum measurement thickness eliminate the high-precision on-line ash content measuring unit of the influence that changes in the line material physical state as far as possible.High-precision on-line ash content measuring unit technical scheme provided by the present invention, its major technique content is: a kind of high-precision on-line ash content measuring unit, it includes the dual energy gamma ray detection agency, data acquisition unit and data handling system, wherein the detector of the low-energy probe portion of dual energy gamma ray detection agency and its shielding gamma-ray follower is by the upper and lower of the sub-transmission belt of the relative suspension of first installation frame, in can gamma-ray detection the detector of part and its shield radioactive ray follower by the relative suspension of second installation frame in the upper and lower of transmission belt, the second installation frame curb girder is articulated on the first installation frame curb girder, and be with first installation frame that an angle is fixing to be constituted.
In the disclosed high-precision on-line ash content measuring unit of the present patent application, adopted middle energy gamma-ray detection partly to favour the structure of setting up of low-energy probe portion one α angle, angle in making it to regulate according to dual energy gamma ray probe portion optimal detection thickness separately on the one hand between energy radiation beams and low energy radiation beams, the inclination degree of being of energy radiation beams and belt material in promptly regulating, guarantee that low energy and middle energy ray all have best material transmission thickness separately, thereby the dual energy gamma ray probe portion all is in the best measurement state; Second aspect has guaranteed the measuring object homogeneity and the simultaneity spatially of dual energy gamma ray, thereby avoided the influence of material objective factors such as the material shapes that online belt transmits changes, granularity is irregular, composition is irregular to greatest extent to measuring, its accuracy, reliability and stability improve greatly; The third aspect, under certain material thickness, the transmission counting of low-energy can change along with the variation of material ash content, and the gamma-ray transmissometer base of middle energy does not originally change with ash content, it is only relevant with the mass thickness of material, thereby when utilizing low-energy to survey the material ash content, can gamma-rays be revised by material thickness by middle, the automatic rotation tunable arrangement of second installation frame promptly is set, slanted angle according to the automatic rotation of thickness modified value output control tunable arrangement makes its measured value more real-time and accurate.
Description of drawings
Concrete structure below in conjunction with accompanying drawing describes technology contents of the present invention in detail.
Accompanying drawing is a high-precision on-line ash content measuring unit structural texture synoptic diagram of the present invention.
Embodiment
Accompanying drawing has provided a concrete structure of implementing of high-precision on-line ash content measuring unit of the present invention.This high-precision on-line ash content measuring unit mainly comprises dual energy gamma ray detection agency, data acquisition unit and central data processing system, the signal transmission of data acquisition unit wherein and dual intensity nuclear detection mechanism is connected, central data processing system and this data handling system are current techique with being connected of data acquisition unit, then repeats no more at this.
The characteristics of this measurement mechanism are the dual energy gamma ray detection agency; it implements structure as shown in drawings; it includes the low-energy probe portion that is set up in first installation frame 6 and is arranged at the middle energy gamma-ray detection part of second installation frame 3, and the collimating apparatus that each gamma-ray detection part all is provided with before detector radioactive ray follower and its detector of shielding protection collimates below and the top that corresponding fixed mount is located at transmission belt.In detector the place ahead collimating apparatus being set, is in order to reduce influence and two kinds of influences that gamma-rays is mutual that natural ray, ray scattering bring.In this enforcement structure, fixedly set up first installation frame 6 of low-energy probe portion, its curb girder vertical fixing is on transmission belt frame 12, and the above and below that its lower and upper cross-member is positioned at transmission belt 1 fixedly installs low energy detector 4 and the low-energy radioactive ray follower 11 relative with its collimation respectively; Hinged with the curb girder of first installation frame 6, and with first installation frame 6 be a α angle be provided with can gamma-ray detection in being provided with second installation frame 3 of part, pin joint A should be positioned at the material bed horizontal extent of transmission belt position, after can selecting an angle α value in advance, this pin joint A fixes two frameworks, in this enforcement structure, be articulated in the upper end B point of second installation frame 3, the slip of lower end C point places the transverse slipway 13 of belt holder 12 to be provided with the support bar 9 of one second installation frame, and the end slipway 14 on the support bar 9 has constituted the cross slideway of being regulated the second installation frame α angle by support bar 9 with the transverse slipway 13 of belt holder 12; Also can adopt the structure that is rotatably assorted with the first installation frame curb girder at this pin joint A, be more convenient for sending automatic steering order second installation frame, the 3 enforcement angles that are arranged at the stepper motor output shaft are rotated adjusting control automatically by data handling system; The range of adjustment 25-70 of its α angle °, record two kinds of gamma-ray optimum measurement thickness according to experiment, in conjunction with on-the-spot actual material thickness, adapt to different on-the-spot angle values through calculating.The middle of collimating apparatus is installed can be fixedly set on the entablature and sill of second installation frame by gamma-ray detection detector 8 and its radioactive ray follower 2 through shielding protection partly.In the present embodiment, its low-energy radioactive source selects for use energy lower
241Am gamma-rays radioactive source wherein can the gamma-rays radioactive source be middle energy
137Cs gamma-rays radioactive source is placed the line style radioactive source in follower, also can evenly be placed with 2-3 horizontal point-like gamma ray radiator placed side by side respectively and replace the line style radioactive source, to satisfy the requirement of detection width; And by adjusting the distance between radioactive source, detector and the belt, satisfy as far as possible that measurement data can be similar to that collimated beam handles requirement.Its detector is the Nal scintillation detector, its
241It is the scintillation detector of Φ 75*50, vertically setting that the Am detector can be selected crystal for use, its
137The Cs detector can select for use Φ 40*80 scintillation detector, parallel belts to place, and to increase the test surface to tested material, avoids the influence of belt deviation to measuring.
From
241The gamma-rays that Am gamma-ray follower 11 sends through the material bed and detector collimator apparatus 5. of belt by
241Am detector 4 receives, from
137The gamma-rays transmission that Cs gamma-ray follower 2 sends cross after material bed and its detector collimator apparatus 7 of belt by
137Cs detector 8 receives, and receives its detectable signal by data acquisition unit, and is delivered to data handling system, carries out data computation and handles, analyzes, and draws the ash content measurement result of material.
Claims (5)
1. high-precision on-line ash content measuring unit; it includes the dual energy gamma ray detection agency; data acquisition unit and data handling system; the detector (4) that it is characterized in that the low-energy probe portion of dual energy gamma ray detection agency wherein with through the low-energy radioactive ray follower (11) of shielding protection by the relative suspension of first installation frame (6) in the upper and lower of transmission belt; in can gamma-ray detection part detector (8) with can gamma-rays radioactive ray followers (2) through shielding protection middle by the relative suspension of second installation frame (3) in the upper and lower of transmission belt, second installation frame (3) curb girder is articulated on first installation frame (6) curb girder; and be with first installation frame that an angle is fixing to be constituted.
2. according to the high-precision on-line ash content measuring unit of claim 1, it is characterized in that the scope of the angle (α) of described two installation frames (6,3) is 25-70 °.
3. according to the high-precision on-line ash content measuring unit of claim 1, it is characterized in that its low-energy radioactive ray follower is
241Am gamma-ray follower, middle energy gamma-rays radioactive ray follower are middle energy
137The Cs gamma-ray follower in follower, adopts 2-3 the horizontal point-like gamma ray radiator of evenly placing placed side by side.
4. high-precision on-line ash content measuring unit according to claim 3 is characterized in that the detector (4) of low-energy probe portion and the detector (8) of middle energy gamma-ray detection part be the Nal scintillation detector.
5. according to the high-precision on-line ash content measuring unit of claim 1, it is characterized in that the ray collimator apparatus being installed at the detector (4) of low-energy probe portion and detector (8) front of middle energy gamma-ray detection part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610047919A CN1940544B (en) | 2006-09-26 | 2006-09-26 | High-precision on-line ash content measuring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610047919A CN1940544B (en) | 2006-09-26 | 2006-09-26 | High-precision on-line ash content measuring unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1940544A CN1940544A (en) | 2007-04-04 |
| CN1940544B true CN1940544B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610047919A Expired - Fee Related CN1940544B (en) | 2006-09-26 | 2006-09-26 | High-precision on-line ash content measuring unit |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095744A (en) * | 2010-11-25 | 2011-06-15 | 贾文宝 | Three-energy coal ash content online monitoring device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749344B (en) * | 2012-06-19 | 2016-03-16 | 内蒙古立信测控技术有限公司 | A kind of coal ash detection method based on single radioactive source |
| CN102749433A (en) * | 2012-07-17 | 2012-10-24 | 中国神华能源股份有限公司 | Coal ash content detecting method |
| CN106896119A (en) * | 2017-04-18 | 2017-06-27 | 朔州中煤平朔能源有限公司 | Ash treatment system and its ash content detector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4090074A (en) * | 1975-10-29 | 1978-05-16 | Australian Atomic Energy Commission | Analysis of coal |
| US4884288A (en) * | 1985-12-31 | 1989-11-28 | Commonwealth Scientific And Industrial Research Organization | Neutron and gamma-ray moisture assay |
| CN2476814Y (en) * | 2001-04-04 | 2002-02-13 | 西北核技术研究所 | Coal ash content investigating device |
| CN1346981A (en) * | 2001-11-27 | 2002-05-01 | 丹东东方测控技术有限公司 | Method for determining ore grade and ash content of coal and portable measuring instrument |
-
2006
- 2006-09-26 CN CN200610047919A patent/CN1940544B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4090074A (en) * | 1975-10-29 | 1978-05-16 | Australian Atomic Energy Commission | Analysis of coal |
| US4884288A (en) * | 1985-12-31 | 1989-11-28 | Commonwealth Scientific And Industrial Research Organization | Neutron and gamma-ray moisture assay |
| CN2476814Y (en) * | 2001-04-04 | 2002-02-13 | 西北核技术研究所 | Coal ash content investigating device |
| CN1346981A (en) * | 2001-11-27 | 2002-05-01 | 丹东东方测控技术有限公司 | Method for determining ore grade and ash content of coal and portable measuring instrument |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095744A (en) * | 2010-11-25 | 2011-06-15 | 贾文宝 | Three-energy coal ash content online monitoring device |
| CN102095744B (en) * | 2010-11-25 | 2012-09-05 | 内蒙古立信测控技术有限公司 | Three-energy coal ash content online monitoring device |
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| Publication number | Publication date |
|---|---|
| CN1940544A (en) | 2007-04-04 |
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