CN106093011B - Coal quality detecting method and its coal quality laser detection analysis instrument of application - Google Patents
Coal quality detecting method and its coal quality laser detection analysis instrument of application Download PDFInfo
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- CN106093011B CN106093011B CN201610548951.1A CN201610548951A CN106093011B CN 106093011 B CN106093011 B CN 106093011B CN 201610548951 A CN201610548951 A CN 201610548951A CN 106093011 B CN106093011 B CN 106093011B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/718—Laser microanalysis, i.e. with formation of sample plasma
Abstract
The invention discloses a kind of coal quality detecting method and its coal quality laser detection analysis instruments of application, coal quality laser detection analysis instrument includes: three-dimensional motion example platform, briquette is sent into detection zone for moving briquette to be measured by the three-dimensional motion example platform；Laser aid, the laser aid are arranged in the top of detection zone, and the laser aid includes pulse laser for issuing laser and the auto focus device that laser is focused on to the briquette surface in detection zone；Spectral analysis device, the spectral analysis device includes spectrometer and spectra collection component, spectra collection component is connected with spectrometer, so as to the light with corresponding briquette information that the plasma of spectra collection component acquisition briquette surface excitation is given off, and passes it to spectrometer；Computer, the spectrometer are connected with the computer, so that the spectral response signal of generation is passed to computer by spectrometer.Pass through the available high-precision coal quality on-line analysis result of this method.
Description
Technical field
The present invention relates to a kind of coal quality detecting method and its coal quality laser detection analysis instruments of application.
Background technique
Currently, in coal mine, coal washery and uses unit, the coal index meeting of producing coal coal at the production of the coals such as coal-burning power plant
The productivity effect for directly influencing enterprise, according to the different industrial indexs and constituent content of coal, adjustment in real time, optimization production
Technique can effectively improve Coal Quality in coal mine and coal preparation plant, improve clean coal yield, control cleaned coal index；In coal-burning power plant
It can burn by adjusting process optimization, it is energy saving, reduce disposal of pollutants.The measurement of traditional commercial factor for coal and element
The defects of method has analysis speed slow, and technique is cumbersome, cannot achieve on-line plan, often in coal production use process
In have biggish hysteresis quality, often result in the waste of resource and the pollution of environment.
Currently used commercial factor for coal and the on-line analysis technology of element are x-ray fluorescence technology, neutron induced
Prompt gamma ray analytical technology and dual intensity gamma ray transmissive technology.X-ray fluorescence technology can only measure atomic number and be greater than
11 element is unable to measure carbon, protium, the nitrogen etc. in coal, and fixed carbon, hydrogen in coal cannot be measured by causing
Defect, and measurement accuracy and sensitivity is not high.There is investment greatly in neutron induced prompt gamma ray analytical technology, radiation danger
The shortcomings that harmful big and radioactive source half-life short.And dual intensity gamma ray technology can not then carry out full elemental analysis, it is at high cost and have
Security risk.Since there are these disadvantages, these technologies are not widely used.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, a kind of coal quality detecting method is provided, is led to
Cross the available high-precision coal quality on-line analysis result of this method.
The step of present invention solves above-mentioned technical problem and adopts the technical scheme that: a kind of coal quality detecting method, this method
In contain:
(a) coal quality is sampled by coal quality automatic sampling apparatus；
(b) a part in the coal quality sampled carries out processing in coal dust powder and cake of press device and forms coal dust, and to coal
Powder carries out cake of press processing and forms briquette；Another part in the coal quality of sampling be sent to laboratory analysis coal dust industrial index and
Constituent content；
(c) briquette formed in coal dust powder and cake of press device is sent into three-dimensional motion example platform, and passes through three maintenance and operations
Dynamic example platform send briquette to detection zone；
(d) laser is issued using a pulse laser, and laser is focused on into detection zone by laser auto focusing device
Briquette surface on domain, briquette surface excitation go out plasma, the light with corresponding briquette information that plasma resonance goes out
It is acquired and is sent to spectrometer by spectra collection component again and analyzed, the spectral response signal acquisition exported after then analyzing to meter
In calculation machine；In the process, example platform, the point that transformation laser is got ready on briquette are moved by moving three dimension；
(e) in a computer, modeling analysis is carried out according to multiple spectral response signals, and by spectral response signal and step
(b) industrial index and constituent content that laboratory obtains in carry out mathematics and compare analysis, establish model；Repeat step (a)
Go out the industrial index of coal sample by model analysis to step (d) using the spectral response signal obtained every time as the input of model
And constituent content.
Further, in the step (a), the coal quality automatic sampling apparatus takes a coal sample at regular intervals,
And coal sample carries out step (b) after passing through primary fragmentation and a division inside coal quality automatic sampling apparatus again.
Further, in the step (b), the coal sample sampled every time is carried out brokenly in coal dust powder and cake of press device
Coal dust is regrinded into after broken and drying and processing.
Further, in the step (c), by a briquette sensitive detection parts to the briquette on three-dimensional motion example platform
Whether correct placement is detected: when briquette placement is correct, briquette is sent into detection zone by the three-dimensional motion example platform；
When briquette placement is incorrect, then briquette is waited to place correct.
Further, in the step (d), moving three dimension movement example platform makes briquette on three-dimensional motion example platform
Stepping movement is carried out by zigzag, every time when the movement stops, pulse laser issues laser, and laser is automatic by laser
Focus device focuses on the briquette surface in detection zone.
The present invention also provides a kind of coal quality laser detection analysis instruments, it includes:
Briquette is sent by three-dimensional motion example platform, the three-dimensional motion example platform for moving briquette to be measured
Detection zone；
Laser aid, the top of detection zone is arranged in the laser aid, and the laser aid includes for sending out
The pulse laser of laser and laser is focused on to the auto focus device on the briquette surface in detection zone out；
Spectral analysis device, the spectral analysis device include spectrometer and spectra collection component, spectra collection component with
Spectrometer is connected, so that the plasma of spectra collection component acquisition briquette surface excitation was given off has corresponding briquette
The light of information, and pass it to spectrometer；
Computer, the spectrometer are connected with the computer, so that spectrometer transmits the spectral response signal of generation
To computer.
Further, coal quality laser detection analysis instrument further includes time delayed signal generator, the control input of pulse laser
End is connected with the computer, and the signal input part of the time delayed signal generator is connected with computer, and the time delayed signal produces
The signal output end of raw device is connected with the spectrometer.
Further for enabling spectrometer to obtain radiating most weak, effective strongest spectrum of spectrum, the automatic focalizer
Part include the first reflecting mirror, the second reflecting mirror and condenser lens, pulse laser issue laser face described in the first reflecting mirror,
Second reflecting mirror described in the laser face that first reflecting mirror reflects, the laser vertical incidence that second reflecting mirror reflects
Condenser lens, the laser after condenser lens refraction focus on the briquette surface in detection zone.
Further, the spectra collection component includes collimating mirror and optical fiber, and one end of optical fiber is connected with collimating mirror, optical fiber
The other end is connected with spectrometer.
After above-mentioned technical proposal, method of the invention is by combining mechanical sampling, and automatic sample, obtaining has generation
Then the coal sample of table is suppressed by briquette coal dust briquette is made, pass through automatic multimetering, averaged spectrum response letter later
Number, it is established that the mathematical model of spectral response signal and commercial factor for coal and constituent content finally utilizes the mathematical model pair
Coal carries out on-line analysis, to obtain high-precision online result.It is examined compared to other laser induced breakdown spectroscopy (LIBS)
Survey method overcomes the problem of the surface LIBS sampling representativeness difference, compared to other online coal measurement methods, measurement accuracy
Height, and there is no radiation source, investment is small, and it is small in size, facilitate installation.
Detailed description of the invention
Fig. 1 is the functional block diagram of coal quality laser detection analysis instrument of the invention.
Specific embodiment
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
Contain in a kind of the step of coal quality detecting method, this method:
(a) coal quality is sampled by coal quality automatic sampling apparatus；
(b) a part in the coal quality sampled carries out processing in coal dust powder and cake of press device and forms coal dust, and to coal
Powder carries out cake of press processing and forms briquette；Another part in the coal quality of sampling be sent to laboratory analysis coal dust industrial index and
Constituent content；
(c) briquette formed in coal dust powder and cake of press device is sent into three-dimensional motion example platform, and passes through three maintenance and operations
Dynamic example platform send briquette to detection zone；
(d) laser is issued using a pulse laser, and laser is focused on into detection zone by laser auto focusing device
Briquette surface on domain, briquette surface excitation go out plasma, the light with corresponding briquette information that plasma resonance goes out
It is acquired and is sent to spectrometer by spectra collection component again and analyzed, the spectral response signal acquisition exported after then analyzing to meter
In calculation machine；In the process, example platform, the point that transformation laser is got ready on briquette are moved by moving three dimension；
(e) in a computer, modeling analysis is carried out according to multiple spectral response signals, and by spectral response signal and step
(b) industrial index and constituent content that laboratory obtains in carry out mathematics and compare analysis, establish model；Repeat step (a)
Go out the industrial index of coal sample by model analysis to step (d) using the spectral response signal obtained every time as the input of model
And constituent content.Analysis result is stored, and can be shown, is printed or by network, circuit or other connection types
It is sent to other systems.
In the step (a), the coal quality automatic sampling apparatus takes a coal sample, and coal sample at regular intervals
By carrying out step (b) again after primary fragmentation inside coal quality automatic sampling apparatus and a division.
In the step (b), the coal sample sampled every time is crushed and is dried in coal dust powder and cake of press device
The coal dust of 0.2mm or so is regrinded into after dry-cure, drying can be dried by heating rod；Then coal dust is separated by gas powder
Device is sent to transport mechanism, and a part of coal dust is sent in mold by transport mechanism, and hydraulic press will be in mold by the pressure of 100Mpa
Coal dust be pressed into cake, and another part coal, to the box that keeps sample is sent to, the coal dust in the box that keeps sample is sent to laboratory, with facilitate into
Row calibration or result compare.
In the step (c), by a briquette sensitive detection parts to the briquette on three-dimensional motion example platform whether just
Really place and detected: when briquette placement is correct, briquette is sent into detection zone by the three-dimensional motion example platform；Work as briquette
When placing incorrect, then briquette is waited to place correct.
In the step (d), moving three dimension movement example platform makes on three-dimensional motion example platform briquette by zigzag
It is mobile to carry out stepping, the distance of about 1.5mm can be moved every time, every time when the movement stops, pulse laser issues laser, and
Laser is focused on into the briquette surface in detection zone by laser auto focusing device.
As shown in Figure 1, a kind of coal quality laser detection analysis instrument, it includes:
Briquette is sent by three-dimensional motion example platform, the three-dimensional motion example platform for moving briquette to be measured
Detection zone；
Laser aid, the top of detection zone is arranged in the laser aid, and the laser aid includes for sending out
The pulse laser of laser and laser is focused on to the auto focus device on the briquette surface in detection zone out；
Spectral analysis device, the spectral analysis device include spectrometer and spectra collection component, spectra collection component with
Spectrometer is connected, so that the plasma of spectra collection component acquisition briquette surface excitation was given off has corresponding briquette
The light of information, and pass it to spectrometer；
Computer, the spectrometer are connected with the computer, so that spectrometer transmits the spectral response signal of generation
To computer.
As shown in Figure 1, coal quality laser detection analysis instrument further includes controller and time delayed signal generator, pulse laser
Control signal be connected with the computer, the signal input part of the time delayed signal generator is connected with computer, described
The signal output end of time delayed signal generator is connected with the spectrometer.
As shown in Figure 1, the auto focus device includes the first reflecting mirror 1, the second reflecting mirror 2 and condenser lens 3, pulse
First reflecting mirror 1 described in the laser face that laser issues, the second reflecting mirror described in the laser face that the first reflecting mirror 1 reflects
2, the laser vertical incidence condenser lens 3 that second reflecting mirror 2 reflects, the laser after condenser lens 3 reflects focuses on
Briquette surface in detection zone.
As shown in Figure 1, the spectra collection component includes collimating mirror 4 and optical fiber, one end of optical fiber is connected with collimating mirror 4,
The other end of optical fiber is connected with spectrometer.
Pulse laser of the invention use Nd:YAG pulse laser, optical maser wavelength 1064nm, pulsewidth 5ns,
Energy is used excite and inspire by instantaneous high-temperature in sample surfaces to sample for the laser of 90mJ when detection
Gas ions, plasma launch outward out the optical information with sample to be tested information, and collimating mirror 4 passes through optical fiber after collecting light
It is transmitted in spectrometer, light is imaged in spectrometer and result is sent in control computer and handles.
In the detection system, pulse laser is in two reflecting mirrors, a condenser lens 3 and the indoor sample of sample
It is arranged vertically, adjusts the angle so that the first reflecting mirror of pulse laser light-emitting window face 1, what the first reflecting mirror 1 reflected swashs
2 center of the second reflecting mirror of light face, the laser vertical incidence condenser lens 3 that the second reflecting mirror 2 reflects, pulse laser produce
Raw laser is focused into a superlaser point in the indoor briquette upper surface of sample and inspires after condenser lens 3
Gas ions, the positive plasma of collimating mirror 4, are connect by optical fiber with spectrometer, and the plasma emission being collected into is come out
Light with sample message is sent to spectrometer by optical fiber, and spectrometer passes through the control of time delayed signal generator, centainly prolonging
When after, be imaged radiating when most weak, effective spectrum is strongest, send spectrometer for spectrum after imaging, computer is simultaneously
Can be mobile by control three-dimensional motion example platform, enable sample mobile in array (Z-type) under laser, laser can be equal
It is even it is as much as possible be distributed on briquette sample, the spectral information made is better able to represent entire briquette.
Briquette is detected by briquette sensitive detection parts in the present invention, briquette sensitive detection parts are by photo resistance, photosensitive module
It is formed with spectrometer, spectrometer is transmitted a signal to if detecting briquette, fortune is sent after computer acquisition to this signal
Three-dimensional motion example platform is given in dynamic instruction, and briquette is delivered to detection zone by three-dimensional motion example platform, by auto focus device
It focuses between detection laser and sample, if it is unsuccessful repeatedly to focus, then it is assumed that the briquette does not meet testing requirements, this
When three-dimensional motion example platform execute abandon sample instruction, by unqualified briquette submitting sample room then proceed to wait sample delivery, such as
Fruit is focused successfully, then executes detection instruction.
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection scope.
Claims (3)
1. a kind of coal quality detecting method, which is characterized in that it applies a coal quality laser detection analysis instrument, coal quality laser detection point
Analyzer device includes:
Briquette is sent into and is detected for moving briquette to be measured by three-dimensional motion example platform, the three-dimensional motion example platform
Region；
Laser aid, the top of detection zone is arranged in the laser aid, and the laser aid includes sharp for issuing
The pulse laser of light and the auto focus device that laser is focused on to the briquette surface in detection zone；
Spectral analysis device, the spectral analysis device include spectrometer and spectra collection component, spectra collection component and spectrum
Instrument is connected, so that the plasma of spectra collection component acquisition briquette surface excitation was given off has corresponding briquette information
Light, and pass it to spectrometer；The spectra collection component includes collimating mirror and optical fiber, one end and the collimating mirror phase of optical fiber
Even, the other end of optical fiber is connected with spectrometer；
Computer, the spectrometer are connected with the computer, so that the spectral response signal of generation is passed to meter by spectrometer
Calculation machine；
It further include time delayed signal generator, the control signal of pulse laser is connected with the computer, the time delayed signal
The signal input part of generator is connected with computer, the signal output end of the time delayed signal generator and the spectrometer phase
Even；
The auto focus device includes the first reflecting mirror, the second reflecting mirror and condenser lens, the laser that pulse laser issues
First reflecting mirror described in face, the second reflecting mirror described in the laser face that the first reflecting mirror reflects, second reflecting mirror are anti-
The laser vertical incidence condenser lens shot out, the laser after condenser lens refraction focus on the briquette surface in detection zone；
Contain in the step of method:
(a) coal quality is sampled by coal quality automatic sampling apparatus；
(b) sample coal quality in a part carried out in coal dust powder and cake of press device processing formed coal dust, and to coal dust into
Row cake of press processing forms briquette；Another part in the coal quality of sampling is sent to the industrial index and element of laboratory analysis coal dust
Content；
(c) briquette formed in coal dust powder and cake of press device is sent into three-dimensional motion example platform, and passes through three-dimensional motion sample
Product platform send briquette to detection zone；
(d) it adjusts the angle so that pulse laser light-emitting window the first reflecting mirror of face, the laser that the first reflecting mirror reflects is just
To the second mirror center, the laser vertical incidence condenser lens that the second reflecting mirror reflects, pulse laser generates laser,
After condenser lens, a superlaser point is focused into the indoor briquette upper surface of sample and inspires plasma,
The positive plasma of collimating mirror is connect by optical fiber with spectrometer, and the plasma emission being collected into is come out and has sample
The light of information is sent to spectrometer by optical fiber, and spectrometer passes through the control of time delayed signal generator, after certain time-delay,
It radiates and is imaged when most weak, effective spectrum is strongest, send spectrometer for spectrum after imaging, the spectrum exported after then analyzing
Response signal is acquired into computer；In the process, example platform is moved by moving three dimension, transformation laser is beaten on briquette
The point of point；
(e) in a computer, modeling analysis is carried out according to multiple spectral response signals, and by spectral response signal and step (b)
The industrial index and constituent content that middle laboratory obtains carry out mathematics and compare analysis, establish model；Repeat step (a) to step
Suddenly (d), using the spectral response signal obtained every time as the input of model, the industrial index and member of coal sample are gone out by model analysis
Cellulose content；
In the step (c), whether the briquette on three-dimensional motion example platform is correctly put by a briquette sensitive detection parts
Set and detected: when briquette placement is correct, briquette is sent into detection zone by the three-dimensional motion example platform；When briquette is placed
When incorrect, then briquette is waited to place correct；
In the step (d), moving three dimension movement example platform carries out briquette on three-dimensional motion example platform by zigzag
Stepping is mobile, and every time when the movement stops, pulse laser issues laser, and laser is focused by laser auto focusing device
Briquette surface in detection zone.
2. coal quality detecting method according to claim 1, it is characterised in that: in the step (a), the coal quality is certainly
Dynamic sampling apparatus takes a coal sample at regular intervals, and coal sample by primary fragmentation inside coal quality automatic sampling apparatus and
Step (b) is carried out again after division.
3. coal quality detecting method according to claim 1, it is characterised in that: in the step (b), in coal dust powder
With broken and drying and processing is carried out to the coal sample sampled every time in cake of press device after regrind into coal dust.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107389608A (en) * | 2017-07-13 | 2017-11-24 | 山东华唐环保科技有限公司 | Application on site of the LIBS laser-induced spectral analysis in coal property test |
| CN110196247A (en) * | 2018-02-26 | 2019-09-03 | 成都艾立本科技有限公司 | A kind of fine coal classification method based on laser induced breakdown spectroscopy |
| CN112070184B (en) * | 2020-08-11 | 2021-10-22 | 华中科技大学 | Coal quality detection calibration device of laser spectrum coupling RFID radio frequency technology |
| CN112129742A (en) * | 2020-09-10 | 2020-12-25 | 刘舆帅 | Coal element detector |
| CN113433114A (en) * | 2021-06-07 | 2021-09-24 | 安徽华电六安电厂有限公司 | Laser detection visualization device for coal quality of as-fired coal |
| CN115165847A (en) * | 2022-07-07 | 2022-10-11 | 中煤科工集团上海有限公司 | Coal rock spectrum sensing device and coal mining machine comprising same |
| CN116297272B (en) * | 2023-05-22 | 2023-08-18 | 北京易兴元石化科技有限公司 | On-line coal quality analysis system and method |
| CN116297273B (en) * | 2023-05-22 | 2023-08-18 | 北京易兴元石化科技有限公司 | On-line analysis system and method for coal quality based on factory entry |
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