CN111272693A - Cement raw material component on-line measuring device based on near infrared spectrum - Google Patents
Cement raw material component on-line measuring device based on near infrared spectrum Download PDFInfo
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- CN111272693A CN111272693A CN201811482594.9A CN201811482594A CN111272693A CN 111272693 A CN111272693 A CN 111272693A CN 201811482594 A CN201811482594 A CN 201811482594A CN 111272693 A CN111272693 A CN 111272693A
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- 239000004568 cement Substances 0.000 title claims abstract description 82
- 239000002994 raw material Substances 0.000 title claims abstract description 61
- 238000002329 infrared spectrum Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 70
- 239000000523 sample Substances 0.000 claims abstract description 54
- 239000013307 optical fiber Substances 0.000 claims abstract description 34
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 34
- 239000010980 sapphire Substances 0.000 claims abstract description 34
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 235000012054 meals Nutrition 0.000 claims abstract description 6
- 238000004566 IR spectroscopy Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000004497 NIR spectroscopy Methods 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010183 spectrum analysis Methods 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
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- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an online detection device for cement raw material components based on near infrared spectrum, which comprises: a cement raw material continuous sampling system, an infrared spectrum system and a controller; the continuous sampling system of cement raw meal includes: the sapphire window sheet sampler comprises a sampler, a conveying track, a pressure sample plate, a detection track and a sapphire window sheet, wherein the bottom end of the sampler is connected with the conveying track, and the bottom end of the conveying track is connected with the detection track; a sapphire window sheet is arranged at the bottom of the detection track; the infrared spectroscopy system comprises: the Fourier near-infrared spectrometer, the light path converter, the near-infrared optical fiber and the optical fiber probe are connected in sequence; the sampler and the Fourier near infrared spectrometer are electrically connected with the controller; the fiber probe is arranged at the bottom of the sapphire window sheet. The near infrared spectrum-based on-line detection device for the components of the cement raw materials can realize on-line detection of the cement raw materials in the cement production process, can realize static measurement of samples, and greatly improves the detection precision compared with dynamic measurement.
Description
Technical Field
The invention relates to the technical field of cement raw material component detection equipment, in particular to a near infrared spectrum-based cement raw material component online detection device.
Background
The cement is an indispensable basic material in national economic construction, and the quality of the cement is directly related to the safety of human life and property. In cement production, the ratio of each raw material directly determines the quality of cement, so the ratio of raw materials needs to be adjusted to control the quality of cement products in the cement production process. The main component of the cement raw meal is Al2O3、CaCO3、Fe2O3、SiO2And MgO, etc. in the cement industry, the proportion of raw materials is controlled by detecting the relative change of the content of the oxides in the cement raw materials. The commonly used on-line detection means is neutron activation detection, but the method has high cost, radiation and certain harm to workers.
Near infrared spectroscopy (NIR) is a modern analysis technique with high efficiency and rapidness, which comprehensively uses the latest research results of multiple subjects such as computer technology, spectroscopy, chemometrics and the like, and is increasingly widely applied in multiple fields with unique advantages, and is gradually generally accepted and officially approved by the public. The working principle of the near infrared spectrum technology is as follows: when a sample is illuminated by a near infrared light source, the molecules absorb radiation at certain frequencies, causing the molecules to vibrate and rotate with a level transition from the ground state to the excited state, which reduces the transmitted (or reflected) light intensity corresponding to these absorption regions. The near infrared spectrum is obtained by recording the relation curve of the percentage transmission (reflection) ratio and the wavelength (wave number) of the near infrared light. The spectrum contains information about the species and concentration of the substance in the sample, and a chemometric modeling is used to predict the concentration information of the sample.
The cement raw materials are transported by the air chute in the cement plant, the raw materials are in a motion state in the air chute, and the components of the cement raw materials are complex, so that the components can be layered when the cement raw materials are transported by air pressure in the air chute, and the detection effect is influenced.
Therefore, how to provide an online detection device for cement raw materials based on near infrared spectrum, which can improve the detection accuracy, is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an online detection device for cement raw material components based on near infrared spectroscopy, which can realize online detection of cement raw materials in a cement production process, can realize static measurement of samples, and greatly improves detection accuracy compared with dynamic measurement.
In order to achieve the purpose, the invention adopts the following technical scheme:
an on-line detection device of cement raw material components based on near infrared spectrum comprises: the system comprises a cement raw material continuous sampling system, an infrared spectrum system and a controller, wherein the cement raw material continuous sampling system and the infrared spectrum system are electrically connected with the controller; the continuous sampling system of cement raw meal includes: the sampler is connected with the bottom end of the middle part of an air chute of a cement production line, the bottom end of the sampler is connected with the conveying rail, and the bottom end of the conveying rail is connected with the detection rail; the sapphire window sheet is embedded at the bottom of the detection track; the sampler and the pressure sample plate are electrically connected with the controller; the infrared spectroscopy system comprises: the optical fiber detection device comprises a Fourier near-infrared spectrometer, an optical path converter, a near-infrared optical fiber and an optical fiber probe, wherein the Fourier near-infrared spectrometer is detachably and mechanically connected with the optical path converter, and the optical path converter, the near-infrared optical fiber and the optical fiber probe are connected through flanges; the Fourier near infrared spectrometer is electrically connected with the controller; the optical fiber probe is arranged at the bottom of the sapphire window sheet.
According to the near infrared spectrum-based on-line detection device for the components of the cement raw materials, the sampler is connected with the air chute of the cement production line, the sampler continuously takes out the cement raw material sample in the air chute of the cement production line and reaches the sapphire window sheet at the bottom of the detection track through the conveying track, and the light source can irradiate the cement raw material sample through the sapphire window sheet; the near infrared light source is arranged in the Fourier near infrared spectrometer, light is coupled into a near infrared optical fiber through the light path converter and reaches the optical fiber probe through the near infrared optical fiber, the near infrared light irradiates a cement raw material sample through the sapphire window sheet, returns to the optical fiber probe through diffuse reflection and is transmitted to the light path converter through the near infrared optical fiber, and the light is coupled into the Fourier near infrared spectrometer for spectral analysis; the online detection can be realized, the safety and the harmlessness are realized, the cost is low, and the detection precision is high.
Preferably, the continuous sampling system for cement raw materials further comprises an air spray gun and a waste collection box, wherein the air spray gun is arranged at one end of the detection track, and the waste collection box is arranged at the other end of the detection track; the air spray gun is electrically connected with the controller.
The air spray gun is connected to one end of the detection track, the waste collection box is connected to the other end of the detection track, the air spray gun is controlled by the controller to blow detected cement raw material samples into the waste collection box from the sapphire window sheet, and the sapphire window sheet can be blown clean.
Preferably, the bottom of the detection track is provided with a circular hole, the sapphire window sheet is arranged in the circular hole, and the optical fiber probe penetrates through the sapphire window sheet to detect the cement raw material sample.
Preferably, a sample pressing plate is arranged inside the detection track, the sample pressing plate is connected with the detection track, and the sample pressing plate is used for compacting the cement raw material sample.
Preferably, the diameter of the sapphire window sheet is 20-60mm, and the thickness of the sapphire window sheet is 0.8-3.0 mm.
Preferably, the pressure of the air spray gun is 0.3-6 Mpa.
According to the technical scheme, compared with the prior art, the invention discloses the cement raw material component online detection device based on the near infrared spectrum, a cement raw material sample is obtained at the bottom end of the middle part of the air chute of the cement production line, the cement raw material sample reaches the sapphire window sheet of the detection track through the conveying track, the near infrared light source irradiates the cement raw material sample below the sapphire window sheet, the cement raw material sample returns to the near infrared spectrometer through the diffuse reflection by the optical fiber probe for spectral analysis, the static measurement of the sample is realized, and the detection precision is greatly improved compared with the dynamic measurement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram provided by the present invention.
The device comprises a 1-air chute, a 2-sampler, a 3-conveying track, a 4-detection track, a 5-pressure sample plate, a 6-sapphire window sheet, a 7-air spray gun, an 8-waste collection box, a 9-Fourier near infrared spectrometer, a 10-light path converter, an 11-near infrared optical fiber and a 12-optical fiber probe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses an online detection device for cement raw material components based on near infrared spectrum, which comprises: the system comprises a cement raw material continuous sampling system, an infrared spectrum system and a controller, wherein the cement raw material continuous sampling system and the infrared spectrum system are electrically connected with the controller; the continuous sampling system of cement raw meal includes: the device comprises a sampler 2, a conveying rail 3, a pressure sample plate 5, a detection rail 4 and a sapphire window sheet 6, wherein the sampler 2 is connected with the bottom end of the middle part of an air chute 1 of a cement production line, the bottom end of the sampler 2 is connected with the conveying rail 3, and the bottom end of the conveying rail 3 is connected with the detection rail 4; a sapphire window sheet 6 is embedded at the bottom of the detection track 4; the sampler 2 and the sample pressing plate 5 are electrically connected with a controller; the infrared spectroscopy system comprises: the optical fiber detection device comprises a Fourier near-infrared spectrometer 9, an optical path converter 10, a near-infrared optical fiber 11 and an optical fiber probe 12, wherein the Fourier near-infrared spectrometer 9 is detachably and mechanically connected with the optical path converter 10, the near-infrared optical fiber 11 and the optical fiber probe 12 are connected through flanges, and the Fourier near-infrared spectrometer 9 is electrically connected with a controller; the fiber probe 12 is disposed at the bottom of the sapphire window sheet 6.
In order to further optimize the above technical solution, the continuous sampling system for cement raw materials further comprises: the air spray gun 7 is arranged at one end of the detection track 4, and the waste collection box 8 is arranged at the other end of the detection track 4; the air gun 7 is electrically connected to the controller. The front end of the detection track 4 is connected with an air spray gun 7, the rear end of the detection track is connected with a waste collection box 8, and the controller controls the air spray gun 7 to blow in a detected cement raw material sample into the waste collection box 8 from a sapphire window sheet 6 and can blow the sapphire window sheet 6 clean.
In order to further optimize the technical scheme, a circular hole is formed in the bottom of the detection track 4, and the sapphire window sheet 6 is installed in the circular hole, so that the optical fiber probe 12 can conveniently detect the cement raw material sample.
In order to further optimize the technical scheme, a sample pressing plate 5 is arranged inside the detection track 4, the sample pressing plate 5 is connected with the detection track 4, and the sample pressing plate 5 is used for compacting cement raw material samples, so that the detection is facilitated.
In order to further optimize the technical scheme, the diameter of the sapphire window sheet 6 is 20-60mm, and the thickness of the sapphire window sheet is 0.8-3.0 mm.
In order to further optimize the technical scheme, the pressure of the air spray gun 7 is 0.3-6 Mpa.
The on-line detection device for the components of the cement raw material based on the near infrared spectrum provided by the invention has the working process that: the sampler 2 is connected with the production line air chute 1, the sampler 2 continuously takes out the cement raw material sample in the production line air chute 1, the cement raw material sample reaches the sapphire window sheet 6 at the bottom of the detection track 4 through the conveying track 3, the light source can irradiate the cement raw material sample through the sapphire window sheet 6, and the cement raw material sample is compacted by the pressure sample plate 5; the near-infrared light source is arranged in a Fourier near-infrared spectrometer 9, light is coupled into a near-infrared optical fiber 11 through a light path converter 10 and reaches an optical fiber probe 12 through the near-infrared optical fiber 11, near-infrared light irradiates a cement raw material sample through a sapphire window sheet 6, returns to the optical fiber probe 12 through diffuse reflection, is transmitted to the light path converter 10 through the near-infrared optical fiber 11, and is coupled into the Fourier near-infrared spectrometer 9 for spectral analysis; the online detection can be realized, the safety and the harmlessness are realized, the cost is low, and the detection precision is high.
The spectral analysis process comprises the following steps: when cement raw material samples are irradiated by a near infrared light source, molecules absorb certain frequencies to lay, molecular vibration and transition of rotation energy level from a ground state to an excited state are generated, so that the projection light intensity corresponding to the absorption areas is weakened, and a relation curve of the percent transmittance and the wavelength of near infrared light is recorded, so that a near infrared spectrum is obtained. The near infrared spectrum contains the information of the species and concentration of the substances in the cement raw material sample, and then a model is established through chemometrics to predict the concentration information in the cement raw material sample.
The cement raw materials are transported by the air chute in the cement plant, the cement raw materials are in a motion state in the air chute, and because the components of the cement raw materials are complex, the components can be layered when the cement raw materials are transported by air pressure in the air chute, and the detection result is influenced. Therefore, the cement raw material component online detection device based on the near infrared spectrum can realize online detection, is safe and harmless, and has low cost and high detection precision.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An on-line measuring device of cement raw ingredient based on near infrared spectrum which characterized in that includes: the system comprises a cement raw material continuous sampling system, an infrared spectrum system and a controller, wherein the cement raw material continuous sampling system and the infrared spectrum system are electrically connected with the controller;
the continuous sampling system of cement raw meal includes: the device comprises a sampler (2), a conveying track (3), a pressure sample plate (5), a detection track (4) and a sapphire window sheet (6), wherein the sampler (2) is connected with the bottom end of the middle part of an air chute (1) of a cement production line, the bottom end of the sampler (2) is connected with the conveying track (3), and the bottom end of the conveying track (3) is connected with the detection track (4); the sapphire window sheet (6) is embedded in the bottom of the detection track (4); the sampler (2) is electrically connected with the controller;
the infrared spectroscopy system comprises: the optical fiber detection device comprises a Fourier near-infrared spectrometer (9), an optical path converter (10), a near-infrared optical fiber (11) and an optical fiber probe (12), wherein the Fourier near-infrared spectrometer (9) is detachably and mechanically connected with the optical path converter (10), the near-infrared optical fiber (11) and the optical fiber probe (12) are connected through flanges, and the Fourier near-infrared spectrometer (9) is electrically connected with a controller;
the optical fiber probe (12) is arranged at the bottom of the sapphire window sheet (6).
2. The apparatus of claim 1, wherein the continuous sampling system for cement raw meal further comprises: the air spray gun (7) is arranged at one end of the detection track (4), and the waste collection box (8) is arranged at the other end of the detection track (4); the air spray gun (7) is electrically connected with the controller.
3. The near infrared spectrum-based cement raw material component on-line detection device as claimed in claim 2, wherein the detection rail (4) is provided with a circular hole at the bottom, and the sapphire window plate (6) is installed in the circular hole.
4. The apparatus for on-line detection of ingredients in cement raw materials based on near infrared spectroscopy as claimed in claim 3, wherein a pressure gauge plate (5) is provided inside the detection track (4), and the pressure gauge plate (5) is connected to the detection track (4).
5. An apparatus for on-line detection of cement raw ingredients based on near infrared spectroscopy according to any one of claims 2 to 4, wherein the sapphire window plate (6) has a diameter of 20 to 60mm and a thickness of 0.8 to 3.0 mm.
6. The near infrared spectrum-based on-line detection apparatus for ingredients of cement raw materials as set forth in claim 5, wherein the pressure of the air injection lance (7) is 0.3-6 Mpa.
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Cited By (3)
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|---|---|---|---|---|
| CN111751319A (en) * | 2020-07-06 | 2020-10-09 | 济南大学 | Method and system for rapidly detecting content of components in cement raw material based on near infrared spectrum |
| CN111751320A (en) * | 2020-07-06 | 2020-10-09 | 济南大学 | Method and system for detecting content of components in raw cement based on waveband selection |
| CN111781151A (en) * | 2020-07-06 | 2020-10-16 | 济南大学 | Method and system for rapidly detecting content of components in cement raw material |
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Application publication date: 20200612 |