CN203069479U - Non-contact type three-dimensional measuring device for particle movement of fluidized bed - Google Patents
Non-contact type three-dimensional measuring device for particle movement of fluidized bed Download PDFInfo
- Publication number
- CN203069479U CN203069479U CN 201220104594 CN201220104594U CN203069479U CN 203069479 U CN203069479 U CN 203069479U CN 201220104594 CN201220104594 CN 201220104594 CN 201220104594 U CN201220104594 U CN 201220104594U CN 203069479 U CN203069479 U CN 203069479U
- Authority
- CN
- China
- Prior art keywords
- gamma
- fluidized bed
- ray detector
- generation module
- bellmouth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model discloses a non-contact type three-dimensional measuring device for particle movement of a fluidized bed. A set of signal acquisition and transmission channel is respectively arranged on each of the front side and the side surfaces of the fluidized bed (1); a positive channel is formed by sequentially connecting a first gamma-ray detector (21), a sensitive signal amplifier (31), a first pulse signal converter (41), a positive analog-digital sampler (5) and a positive perspective drawing generation module (8) in sequence; a lateral channel is formed by serially connecting a second gamma-ray detector (22), a second sensitive signal amplifier (32), a second pulse signal converter (42), a lateral analog-digital sampler (6) and a lateral perspective drawing generation module (9) in sequence; and the positive perspective drawing generation module (8) and the lateral perspective drawing generation module (9) are connected together in parallel and are subsequently connected with a three-dimensional image reconstruction module (10) and a computer (11). The non-contact type three-dimensional measuring device adopts safe ray imaging, and the three-dimensional, real-time, accurate and safe measurement on the particle movement of the fluidized bed is realized under the condition that a fluid filed is free of interference.
Description
Technical field
The utility model relates to a kind of measuring method and measurement mechanism of gas-solid fluidized bed particle motion, belongs to fluidized bed and multiphase flow measurement technical field.
Background technology
Gas-solid fluidized bed in industrial extensive application such as catalytic cracking, coal combustion, coal gasifications.Heat treatment technics such as fluidized-bed combustion, gasification has become and can realize that extensive disposal of resources utilizes the mainstream technology of solid waste and domestic waste owing to the efficient height, subtract advantages such as holding obviously, can reclaim heat energy.In the scientific research of fluid bed heat treatment technology, engineering design and the commercial Application, all need to be grasped the different operating parameter endocorpuscular characteristics of motion of leaving the bed.The grasp of the fluid bed granulate characteristics of motion is the key of understanding gas-particle heat transfer mechanism of mass transfer, and fluid bedreactors design and structural parameters are all optimized and had great importance.
The measurement of gas-solid fluidized bed particle motion mainly is trace method, namely mixes the tracer grain that some has special marking in fluidized bed, follows the tracks of or catch the motion of tracer grain then by instrument.It is noiseless that scientific and effective movement of particles measuring method should possess stream field, reaches three-dimensional, real-time, accurate and security measurement.In the past few decades, the researcher has invented the tracing method that movement of particles is measured in hot particle spike, phosphorescent particle spike, dyed particles spike, magnetic-particle spike and radioactive grain spike etc. both at home and abroad.But all there is shortcoming more or less in these tracing methods: hot particle spike temperature damping is fast, and precision is undesirable, can't carry out three-dimensional measurement; Phosphorescent particle spike and dyed particles spike adopt visible light to catch movement of particles, the three-dimensional measurement difficulty; Magnetic-particle spike stream field has interference; Radioactive grain trace method such as gamma ray tomography be the most effective particle spike means of generally acknowledging in the world, but three-dimensional chromatography are long sweep time, and tomography speed and particle high-speed motion do not match, and also there is safety problem in some radiomaterial in addition.
The measurement of gas-solid fluidized bed particle motion all is an international difficult problem all the time, does not have a kind of method can realize noiseless, three-dimensional, real-time, the accurate and security measurement of stream field fully at present.For scientific research, engineering design and the commercial Application that promotes the fluid bed heat treatment technology energetically, lot of domestic and foreign colleges and universities, scientific research institution and enterprise all drop into a large amount of manpower and materials, be devoted to movement of particles measuring method and the device of development of new, to grab the highland of intellecture property.
Summary of the invention
Technical matters: the utility model is intended to propose a kind of non-contact 3-D measurement mechanism of fluid bed granulate motion.Adopt the gamma ray imaging, under the glitch-free situation of stream field, realize the three-dimensional to the fluidized bed movement of particles, real-time, accurate and security measurement.
Technical scheme: the basic ideas of the utility model method are as follows: same level height is arranged at an angle of 90 two gamma ray imagers outside fluidized bed excessively, gas-solid fluidized bed selection area is taken synchronously continuously, at the fluoroscopy images of two orthogonal planes, reconstruct particle again at three-dimensional movement locus when catching the tracer grain motion that behind radioisotope labeling, can send gamma ray.
Cover signals collecting and a transmission channel respectively arranged in front and side at fluidized bed, and forward path is made of first gamma-ray detector, sensitive signal amplifier, the first pulse signal converter, forward modulus sampling thief and the series connection of perspective view generation module successively; Lateral approach is made of second gamma-ray detector, the second sensitive signal amplifier, the second pulse signal converter, side direction modulus sampling thief and the series connection of side perspective view generation module successively; (link to each other with computing machine with the 3-D view reconstructed module after perspective view generation module and the parallel connection of side perspective view generation module; First gamma-ray detector of two paths is positioned at same absolute altitude and becomes each layout of 90 degree with respect to fluidized bed with second gamma-ray detector, is connected with the synchronous sequence generator between forward modulus sampling thief and the side direction modulus sampling thief; Front end at first gamma-ray detector and second gamma-ray detector is respectively equipped with a collimating apparatus.
Described collimator arrangement has 29 little bellmouths in the big rear end of front end, and the bellmouth xsect is the octagon structure, each bellmouth front end face circumscribed circle diameter D
2With bellmouth rear end face circumscribed circle diameter D
1Satisfy and concern D
2/ D
1=1.3-1.5; The collimating apparatus center arrangement has a bellmouth, and three layers of layout, uniform 4 bellmouths on first concentric circles, uniform 8 bellmouths on second concentric circles, uniform 16 bellmouths on the 3rd concentric circles are outwards divided in all the other centers; Three concentrically ringed radiuses become arithmetic progression, the tolerance d of this arithmetic progression and collimating apparatus overall diameter D, bellmouth front end face circumscribed circle diameter D
2Between satisfy and to concern D
2＜d≤0.125D.
The measuring method of the non-contact 3-D measurement mechanism of fluid bed granulate motion is to drop into the tracer grain through the radioactive compound mark in the bed material of fluidized bed, tracer grain discharges gamma ray and penetrates after the fluidized bed wall filters by collimating apparatus, enter gamma-ray detector and produce electronic pulse signal, after the sensitive signal amplifier amplifies, send into the pulse signal converter and change into voltage pulse signal; Gathered voltage pulse signal synchronously and be translated into digital signal by synchronous sequence generator control forward modulus sampling thief and side direction modulus sampling thief, frequency acquisition is greater than 100 hertz; Digital signal sends into the perspective view generation module respectively and the side perspective view generation module generates XOZ plane projection image and YOZ plane projection image, two plane pictures generate the XYZ space 3-D view via the 3-D view reconstructed module, send into computing machine, realize the movement locus of real-time follow-up, demonstration and storage tracer grain.
The radioactive compound of tracer grain mark is Na
131I is the Na of 5%-25% with tracer grain concentration in the labeling process
131I aqueous solution soaking 3-5 hour is evenly adhered to solution and is infiltrated into granule interior, dries in the confined space of temperature below 80 degrees centigrade.
Beneficial effect: the measuring method that the gas-solid fluidized bed particle that the utility model proposes mixes has following characteristic and advantage:
(1) radial imaging non-contact measurement, measuring process do not disturb the gas-solid in the fluidized bed to flow, and measure accurately than insertion type.
(2) radioactive compound of mark tracer grain is Na
131I belongs to clinical medical low-activity energy label, technology maturation and to human body and Environmental security.
(3) the gamma ray imaging frequency is greater than 100 hertz, can catch the motion less than 0.01 second process particle, be particularly suitable for measuring the fluid bed granulate rapid movement, solved in the past in the technology such as tomoscan or computed tomography scanning long image taking speed and the movement of particles speed mismatch problem of causing sweep time.
(4) synchronous sequence generator control synchronous high-speed sampling realizes measuring in real time.
(5) 3-D view reconstruct reverts to the space three-dimensional image with perspective view and the side perspective view of gathering synchronously under the same absolute altitude, and the 3 D motion trace of real-time follow-up, demonstration and storage tracer grain is realized three-dimensional measurement.
Description of drawings
Fig. 1 is the non-contact 3-D measurement mechanism system schematic of fluid bed granulate motion of the present utility model.
Fig. 2 is the collimator structure synoptic diagram that uses in the utility model.
Fig. 3 be among Fig. 2 B-B to the sectional structure synoptic diagram.
Having wherein among the above figure has: fluidized bed 1, first gamma-ray detector 21, second gamma-ray detector 22, sensitive signal amplifier 3, the first pulse signal converter 41, the second pulse signal converter 42, forward modulus sampling thief 5, side direction modulus sampling thief 6, synchronous sequence generator 7, perspective view generation module 8, side perspective view generation module 9,3-D view reconstructed module 10, computing machine 11, collimating apparatus 12, bed material 13, tracer grain 14, bellmouth 15, bellmouth front end face 16, bellmouth rear end face 17, the first concentric circless 18, second concentric circles 19, the 3rd concentric circles 20.
Embodiment
Specify the realization of technology path of the present utility model and target below with reference to Fig. 1:
At first choose a small amount of material 13, the service property (quality) mark is 20% Na
131I aqueous solution soaking 4 hours is taken out by 60 degrees centigrade of sealing oven dry and was made tracer grain 14 in 3 hours, and the amount of carrying of radioactive compound is between the 0.5-1 microgram in the tracer grain 14, and radioactivity is greater than 1MBq/L (every liter of million Bake).A small amount of bed material 13 evenly is tiled in the fluidized bed 1, afterwards the tracer grain 14 that makes evenly is sprinkled upon on the bed material of completing 13, at last a large amount of bed material 13 are covered on the tracer grain 14 according to the operation aequum, be tiled in the fluidized bed 1.Fluidized bed 1 adopts to be made the nonmetallic materials a little less than the gamma ray receptivity, as organic glass etc.; Bed material 13 optional silica sands, river sand etc.
The collimating apparatus of selecting for use 12 is of a size of L=50mm, and D=200mm is made by lead alloy, bellmouth front end face 16 circumscribed circle diameter D
2=15mm, radius tolerances is 20mm between first concentric circles 18, second concentric circles 19 and the 3rd concentric circles 20 threes.
As shown in Figure 1, arrange respectively that in front and the side of fluidized bed 1 first gamma- ray detector 21 and 22, two gamma-ray detectors of second gamma-ray detector are in same absolute altitude and become 90 degree; Drop into the tracer grain 14 through the radioactive compound mark in the bed material 13 of fluidized bed 1, tracer grain 14 discharges gamma ray to the fluidized bed external radiation; Gamma ray is the ultrahigh frequency high-energy electromagnetic wave that a kind of wavelength is shorter than 0.2 dust, has high penetration power, penetrate the gamma ray of fluidized bed wall after collimating apparatus 12 is filtered, enter gamma-ray detector 2 and produce electronic pulse signal, electronic pulse signal is sent into the pulse signal converter and is changed into voltage pulse signal after sensitive signal amplifier 3 amplifies; The two-way voltage pulse signal is sent into forward modulus sampling thief 5 and the side direction modulus sampling thief 6 by 7 controls of synchronous sequence generator respectively, gathers voltage pulse signal synchronously and is translated into digital signal, and frequency acquisition is greater than 100 hertz; The digital signal of forward modulus sampling thief 5 outputs generates XOZ plane projection image through perspective view generation module 8, the digital signal of side direction modulus sampling thief 6 outputs generates YOZ plane projection image through side perspective view generation module 9, two plane pictures generate the XYZ space 3-D view via 3-D view reconstructed module 10, send into computing machine 11, so just can realize the movement locus of real-time follow-up, demonstration and storage tracer grain 14.
In addition, for realizing target of the present utility model: the radioactive compound that is used for tracer grain 14 marks is Na
131I, tracer grain 14 usefulness concentration are the Na of 5%-25%
131I aqueous solution soaking 3-5 hour is evenly adhered to solution and is infiltrated into granule interior, dries in the confined space of temperature below 80 degrees centigrade.
For the field range that increases gamma-ray detector 2, improve the gamma ray acquisition rate and reduce pattern distortion, adopt with routine that same diameter through hole is different to be, collimating apparatus 12 is furnished with 29 bellmouths 15 that the big rear end of front end is little in the utility model, as Fig. 2, shown in Figure 3, bellmouth 15 xsects are the octagon structure, each bellmouth front end face 16 circumscribed circle diameter D
2With bellmouth rear end face 17 circumscribed circle diameter D
1Satisfy and concern D
2/ D
1=1.3-1.5; Collimating apparatus 12 center arrangement have a bellmouth 15, and all the other divide three layers of layout from inside to outside, on uniform 8, the 3rd concentric circles 20 on uniform 4, second concentric circles 19 on first concentric circles 18 uniform 16; Three concentrically ringed radiuses become arithmetic progression, the tolerance d of arithmetic progression and collimating apparatus 12 overall diameter D, bellmouth front end face 16 circumscribed circle diameter D
2Between satisfy and to concern D
2＜d≤0.125D.
At first open air A before experiments of measuring begins, make fluidized bed 1 be in running status.Meanwhile open and be placed in not two gamma-ray detectors 2 of ipsilateral of fluidized bed 1, sensitive signal amplifier 3, the pulse signal converter, forward modulus sampling thief 5, perspective view generation module 8, side direction modulus sampling thief 6, side perspective view generation module 9, synchronous sequence generator 7,3-D view reconstructed module 10 and computing machine 11.Synchronous sequence generator 7 sends sampling control signal with 100 hertz frequency simultaneously to forward modulus sampling thief 5 and side direction modulus sampling thief 6, carries out synchronized sampling to guarantee the signal of in the experimentation two gamma-ray detectors 2 being passed back.In the measuring process, the gamma ray that the tracer grain that is labeled discharges passes the wall of fluidized bed 1, caught the generation electronic pulse signal by gamma-ray detector, electronic pulse signal is through amplifying, the conversion back produces the voltage pulse signal between the 0-5 volt, voltage pulse signal is through over-sampling, generate the standard digital vision signal after the image reconstruction, re-constructed out the three-dimensional motion process of tracer grain by 3-D view reconstructed module 10, finally, computing machine 11 is followed the tracks of movement locus and the CONCENTRATION DISTRIBUTION of tracer grain 14 in real time, is shown and store.
Claims (2)
1. the non-contact 3-D measurement mechanism of fluid bed granulate motion, it is characterized in that: cover signals collecting and a transmission channel respectively arranged in front and side at fluidized bed (1), and forward path is made of first gamma-ray detector (21), sensitive signal amplifier (31), the first pulse signal converter (41), forward modulus sampling thief (5) and perspective view generation module (8) series connection successively; Lateral approach is made of second gamma-ray detector (22), the second sensitive signal amplifier (32), the second pulse signal converter (42), side direction modulus sampling thief (6) and side perspective view generation module (9) series connection successively; Perspective view generation module (8) links to each other with computing machine (11) with 3-D view reconstructed module (10) with side perspective view generation module (9) back in parallel; First gamma-ray detector (21) of two paths is positioned at same absolute altitude with second gamma-ray detector (22) and relative fluidized bed (1) becomes each layout of 90 degree, is connected with synchronous sequence generator (7) between forward modulus sampling thief (5) and the side direction modulus sampling thief (6); Front end at first gamma-ray detector (21) and second gamma-ray detector (22) is respectively equipped with a collimating apparatus (12).
2. the non-contact 3-D measurement mechanism of fluid bed granulate according to claim 1 motion, it is characterized in that described collimating apparatus (12) is furnished with 29 bellmouths (15) that the big rear end of front end is little, bellmouth (15) xsect is the octagon structure, each bellmouth front end face (16) circumscribed circle diameter D
2With bellmouth rear end face (17) circumscribed circle diameter D
1Satisfy and concern D
2/ D
1=1.3-1.5; Collimating apparatus (12) center arrangement has a bellmouth (15), three layers of layout are outwards divided at all the other centers, go up uniform 4 bellmouths (15) at first concentric circles (18), second concentric circles (19) is gone up uniform 8 bellmouths (15), and the 3rd concentric circles (20) is gone up uniform 16 bellmouths (15); Three concentrically ringed radiuses become arithmetic progression, the tolerance d of this arithmetic progression and collimating apparatus (12) overall diameter D, bellmouth front end face (16) circumscribed circle diameter D
2Between satisfy and to concern D
2＜d≤0.125D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104594 CN203069479U (en) | 2012-03-20 | 2012-03-20 | Non-contact type three-dimensional measuring device for particle movement of fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104594 CN203069479U (en) | 2012-03-20 | 2012-03-20 | Non-contact type three-dimensional measuring device for particle movement of fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203069479U true CN203069479U (en) | 2013-07-17 |
Family
ID=48768253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220104594 Withdrawn - After Issue CN203069479U (en) | 2012-03-20 | 2012-03-20 | Non-contact type three-dimensional measuring device for particle movement of fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203069479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654443A (en) * | 2012-03-20 | 2012-09-05 | 东南大学 | Non-contact three-dimensional measurement device and method for particle movement of fluidized bed |
-
2012
- 2012-03-20 CN CN 201220104594 patent/CN203069479U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654443A (en) * | 2012-03-20 | 2012-09-05 | 东南大学 | Non-contact three-dimensional measurement device and method for particle movement of fluidized bed |
| CN102654443B (en) * | 2012-03-20 | 2014-09-10 | 东南大学 | Non-contact three-dimensional measurement device and method for particle movement of fluidized bed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102654443B (en) | Non-contact three-dimensional measurement device and method for particle movement of fluidized bed | |
| CN104749648A (en) | Multi-energy spectrum static CT apparatus | |
| CN101858985A (en) | Multifunctional rare earth product radioactivity detecting instrument based on composite detector | |
| CN106547017A (en) | A kind of compound scintillator gamma ray spectrometer | |
| CN103336293A (en) | Method for optimizing capability in discriminating neutrons from gamma rays of liquid scintillator detector | |
| Larachi et al. | Radioactive particle tracking in multiphase reactors: principles and applications | |
| CN203069479U (en) | Non-contact type three-dimensional measuring device for particle movement of fluidized bed | |
| CN102095741A (en) | Method for detecting coal quality composition on conveying belt and device thereof | |
| CN103654835B (en) | A kind of test set and method of testing thereof assessing SPECT pinhole collimator performance | |
| CN103245680A (en) | Fast neutron imaging method and system based on time-of-flight method | |
| CN1948997B (en) | Neutron flux and energy spectrum measuring system of helium cooling solid multiplication agent tritium producing cladding | |
| Soderberg et al. | MicroBooNE: a new liquid argon time projection chamber experiment | |
| CN103776742A (en) | Device and method for jointly measuring particle motion parameter of gas-solid system | |
| CN102841106A (en) | Transmission-type online detection device for coal characteristic indexes | |
| McKinsey et al. | The mini-clean experiment | |
| Pant et al. | Investigation of flow behaviour of coal particles in a pilot-scale fluidized bed gasifier (FBG) using radiotracer technique | |
| Greiffenberg et al. | Detection efficiency of ATLAS-MPX detectors with respect to neutrons | |
| CN201757787U (en) | Multifunctional rare-earth product radioactivity detector based on compound detector | |
| CN103033853B (en) | A kind of mine locating system | |
| CN103839598A (en) | Implosion double-flow-line diagnosis system | |
| CN206439046U (en) | A kind of neutron porosity log instrument | |
| Hu | Recent Results from Daya Bay Reactor Neutrino Experiment | |
| Consiglio et al. | Nuclear Emulsion technique for volcanoes radiography with cosmic ray muons: status of art and future perspectives | |
| CN104749609A (en) | Online track reconstruction data acquisition system based on gas detector and rebuilding method | |
| CN111929066A (en) | Internal combustion engine flow field state on-line monitoring method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130717 Effective date of abandoning: 20140910 |
|
| RGAV | Abandon patent right to avoid regrant |