CN117517360A - Radiant type coal component measuring instrument and radiant type component measuring method - Google Patents
Radiant type coal component measuring instrument and radiant type component measuring method Download PDFInfo
- Publication number
- CN117517360A CN117517360A CN202210919084.3A CN202210919084A CN117517360A CN 117517360 A CN117517360 A CN 117517360A CN 202210919084 A CN202210919084 A CN 202210919084A CN 117517360 A CN117517360 A CN 117517360A
- Authority
- CN
- China
- Prior art keywords
- coal
- radiation
- label
- sample
- measurement
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002864 coal component Substances 0.000 title claims abstract description 28
- 239000003245 coal Substances 0.000 claims abstract description 286
- 230000005855 radiation Effects 0.000 claims abstract description 112
- 238000005259 measurement Methods 0.000 claims abstract description 58
- 238000010521 absorption reaction Methods 0.000 claims abstract description 31
- 239000000126 substance Substances 0.000 claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 238000013178 mathematical model Methods 0.000 claims abstract description 15
- 230000003993 interaction Effects 0.000 claims abstract description 5
- 230000005670 electromagnetic radiation Effects 0.000 claims description 24
- 239000000470 constituent Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005251 gamma ray Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004380 ashing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000012545 processing Methods 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 238000005303 weighing Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000010883 coal ash Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000003039 volatile agent Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 moisture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/20083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials by using a combination of at least two measurements at least one being a transmission measurement and one a scatter measurement
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
A radiant coal component measuring instrument and a radiant component measuring method; the radiation type coal component measuring instrument is composed of a radiation type measuring device, a coal or coal sample conveying device, a sampling device and a data acquisition controller. According to the principle of interaction absorption of substances and radiation rays and the principle of superposition of absorption of radiation rays by a plurality of component forming substances, the radiation component measuring method and the measuring mathematical model are established. Radiation X-ray absorbed by coal or coal sample measured by radiation type coal component measuring instrument i The measuring instrument has the characteristics of quick measurement, high measurement precision and strong adaptability to coal types and coal quality changes, can be applied to various fields such as coal production, processing, utilization, production process control and the like, and has important significance in improving the quality of coal products, improving the utilization rate of coal and improving the production management level.
Description
Technical Field
The present invention relates to the coal composition: measurement of ash, moisture, volatile matter, full carbon and coal calorific value, in particular to the measurement of coal components by adopting a radiation method: measurement of ash, moisture, volatiles, full char and coal calorific value.
Background
There are two methods for analyzing the coal quality at present: the first is an elemental analysis method, which determines that the coal quality has five major elements: the main detection methods and devices at present are as follows: the neutron induction instantaneous method and the detection equipment thereof, the neutron activation method and the detection equipment thereof, the X-ray fluorescence analysis method and the detection equipment thereof, and the laser induction breakdown method and the detection equipment thereof have the problems of radiation safety, equipment complexity, high cost, high price and the like due to the method and the detection equipment, and are applied less at present. And secondly, determining that the coal is composed of four components of ash (A), moisture (M), full Carbon (FC) and volatile (V) by an industrial analysis method of the coal. The main detection methods and devices at present are as follows:
coal composition was measured off-line (static) according to the industrial analytical ash method of GB/T212-2008 coal: ash (a), moisture (M), volatile (V), full Char (FC) and coal calorific value (Q) are currently the most important test methods, and coal quality parameter values detected by the methods are confirmed to be standard values, so that the method is widely used. The method has the main defects of long detection time and incapability of guiding the control of the production process in time.
The dual-energy gamma-ray coal ash on-line detection has more application both abroad and domestic, but the application is limited due to the poor radiation safety and the adaptability of coal and medium changes.
The measuring instrument adopts an X-ray device to measure the ash content of coal, adopts a microwave moisture meter to measure the moisture content of the coal, and calculates the heat productivity of the coal according to the ash content and the moisture content.
The invention discloses a radiant type coal component measuring instrument and a radiant type component measuring method, which utilize the change of the intensity (or wave energy) of radiant rays in the absorption or scattering process generated by the interaction of coal and the radiant rays, and realize the coal components by adopting the radiant type component measuring method: off-line or on-line measurement of ash (a), moisture (M), volatiles (V), full Char (FC), and coal calorific value (Q).
Disclosure of Invention
Technical problem that this patent solved:
1. establishing a radiation type component measurement method;
(1) Determining a theoretical basis of a radiation type component measuring method;
X i ＝F(A、M、V、FC)
(2) By X i The reference F (A, M, V, FC) is used to build a medium parameter measurement parameter database and a mathematical model.
2. Constructing a radiation type coal component measuring instrument, and measuring coal or coal sample X according to the measuring instrument i coal And a mathematical model built by the radiation type component measuring method for carrying out the coal componentOff-line or on-line measurements.
1. The radiation type component measuring method comprises the following steps:
1. theoretical basis of radiant ingredient measuring method
The principle of absorption according to the interaction of substances and radiation rays is as follows:
U i ＝U 0 e -μρd
wherein: u (U) i -the radiation detector outputs a signal when there is a substance;
U 0 -the radiation detector outputs a signal when there is no substance;
-the radiation values absorbed by the substance;
mu-the radiation absorption coefficient of the substance;
ρ -density of matter
d-thickness of substance
For a substance composed of multiple components, the absorption of radiation by the substance is equal to the sum of the absorption of radiation by each component, and if the coal is composed of ash (A), moisture (M), volatile (V) and full carbon (C), the following components are included:
X i coal ＝X iA +X iM +X iV +X iFC ————(2)
Wherein:
X i coal ＝-μ Coal ρ Coal d-radiation absorption value of coal
X iA ＝-μ A ρ A d A ash absorption of radiation values
X iM ＝μ M ρ M d M moisture absorption radiation values
X iV ＝-μ V ρ V d V volatile component radiation ray value
X iFC ＝-μ FC ρ FC dFC-all-carbon radiation-absorbing value
Mu p of each component A 、μ M ρ M 、μ V ρ V 、μ FC ρ FC Are all known constants
In the case of d=constant or when d is measured (d is a known number), X i coal Only by the percentage change between A, M, V, FC, namely:
X i coal ＝f(A、M、V、FC)————(3)
X i coal The change in (a) reflects the percentage change between A, M, V, FC, thus, using the measured coal or coal sample X i coal The value can be analyzed to obtain X at the moment i coal Corresponding A, M, V, FC value
(3) The formula is the theoretical basis of the radiant type component measuring method
2. By X i coal Based on =f (A, M, V, FC), according to X of coal i coal A of coal sample detected by ashing method Label (C) 、M Label (C) 、V Label (C) 、FC Label (C) Q and label (C) Value, analysis of X using big data technique i coal And A is a Label (C) 、M Label (C) 、V Label (C) 、FC Label (C) Room and Q Label (C) With FC Label (C) Law of inter-variation, namely: a is that Label (C) ＝f 1 (X i coal )、M Label (C) ＝f 2 (X i coal )、V Label (C) ＝f 3 (X i coal )、FC Label (C) ＝f 4 (X i coal ) Q and label (C) ＝f 5 (FC Label (C) ). Adopting a calibration method to build A, M, V, FC and X i coal Measurement parameter database between Q and FC (note that the database includes a number of measurement parameters) and mathematical model thereof:
A＝a N +b N X i coal (N＝1，2，3，----------NA)
M＝C N +d N X i coal (N＝1，2，3，----------NM)
V＝E N +F N X i coal (N＝1，2，3，----------NV)
FC＝G N +H N X i coal (N＝1，2，3，----------NFC)
Q＝i N +j N FC(N＝1，2，3，----------NQ)
In which a is N b N ，C N d N ，E N F N ，G N H N ，i N j N -is a measurement parameter in a measurement parameter database;
NA, NM, NV, NFC, NQ, which is the number of ash, moisture, volatile matters, full carbon and heating value measurement parameters;
3. according to X of coal i coal And a measurement parameter database, and an identification technology is adopted to establish a pair X i coal Identifying a software package;
4. constructing a radiation type coal component measuring instrument to measure the coal or coal sample X i coal Value according to X of coal or coal sample i coal And combining with a measurement parameter database, adopting an identification software package pair X i coal Identifying and comparing X in the measurement parameter database i coal Corresponding A, M, V, FC and Q measurement parameters, the calculation is:
A＝a N +b N X i coal (n=1, or 2- - - - - - - - - - - -, or=na)
M＝C N +d N X i coal (n=1, or 2- - - - - - - - - - -, or=nm)
V＝E N +F N X i coal (n=1, or 2- - - - - - - - - - - -, or=nv)
FC＝G N +H N X i coal (n=1, or 2- - - - - - - - -, or=nfc)
Q＝i N +j N FC (n=1, or 2- - - - - - - - -, or=nq)
In which a is N b N ，C N d N ，E N F N ，G N H N ，i N j N -is a measurement parameter in a measurement parameter database;
NA, NM, NV, NFC, NQ number of measurement parameters
Accordingly, measurement of the coal components (ash, moisture, volatile matter, full char, and calorific value) was achieved by using the radiation type component measurement method.
In summary, the main technical characteristics of the radiant type coal component measurement method are as follows:
1. deriving theoretical basis of radiation type coal component measurement, namely X, according to industrial analysis method of coal, law of radiation ray absorption by substances and superposition principle i coal =f (A, M, V, FC), establish X i coal The overall concept corresponding to a+m+v+fc=1;
2. establishing a coal quality measurement parameter database and a measurement mathematical model thereof according to a big data technology;
3. establishing a pair X according to the identification technology i coal An identification software package for identifying;
4. structure radiation type coal component measuring instrument for measuring coal or coal sample X i coal Identification software package pair X i coal Identifying the coal quality measurement parameter database and X i coal Corresponding measurement parameters;
5. and calculating the coal components according to a mathematical model.
2. Construction of radiant type coal component measuring instrument
The built radiation type coal component measuring instrument is composed of a radiation type measuring device (1), a coal or coal sample conveying device (2), a sampling device (3) and a data acquisition controller (4).
The radiation measuring device (1) comprises an electromagnetic radiation source (1-1) and a radiation detector (1-2) and a mounting frame (1-3). The electromagnetic radiation source and the radiation detector are respectively arranged above and below the coal or coal sample conveyor (2) or on two sides of the coal or coal sample conveyor (on the same side), and the reflection measurement is carried out in the straight line direction of the incidence angle and the reflection angle of the radiation rays, which is shown in figure 1. The electromagnetic radiation source (1-1) emits radiation rays, the radiation detector (1-2) measures the intensity (wave energy) change of the radiation rays when the coal or the coal sample exists and when the coal or the coal sample does not exist and gives out an electric signal U i And U 0 ；
The coal or coal sample conveying device (2) is arranged between the electromagnetic radiation source (1-1) and the radiation detector or below the electromagnetic radiation source and the radiation detector and is used for conveying the coal or coal sample to the radiation type measuring device for measurement;
the sampling device (3) is arranged above the coal or coal sample conveying device (2) or is located on the coal or coal sample conveying device (2) and is used for collecting the coal or coal sample to be tested;
a data acquisition controller (4) for receiving the electric signal U output by the radiation detector (1-2) i And U 0 Calculated outAnd calculating the components of the coal or the coal sample according to a mathematical model: A. m, V, FC and Q values, as shown in fig. 2, wherein the mathematical model is established according to the radiation type component measurement method, and the mathematical model is:
A＝a N +b N X i coal (N＝1，2，3……＝NA)
M＝C N +d N X i coal (N＝1，2，3……NM)
V＝E N +F N X i coal (N＝1，2，3……NV)
FC＝G N +H N X i coal (N＝1，2，3……NFC)
Q＝i N +j N FC(N＝1，2，3……NQ)
In the middle of
a N b N ，C N d N ，E N F N ，G N H N ，i N j N -measuring parameters in a database of measuring parameters constructed according to a method of measuring radiation type components;
NA, NM, NV, NFC, NQ-is the number of measured parameters of A M N FC and Q
-the radiation values are absorbed by the coal or coal sample.
A. M, V, FC-percentage of each component of the coal.
Q-coal calorific value.
The radiation type component measuring method of the constructed radiation type coal component measuring instrument is characterized by comprising the following steps:
1. theoretical basis for determining radiation type component measuring method
The principle of absorption according to the interaction of substances and radiation rays is as follows:
U i ＝U 0 e -μρd
wherein: u (U) i -the radiation detector outputs an electrical signal when there is a substance;
U 0 -the radiation detector outputs an electrical signal in the absence of a substance;
-a radiation absorption value of the substance;
radiation absorption coefficient of μ -substance;
density of ρ -substance;
d-thickness of the substance;
for a substance composed of multiple components, the absorption of the radiation by the substance is equal to the sum of the absorption of the radiation by each component; for example, the absorption of the radiation rays by coal and the absorption of the radiation rays by each component are as follows:
X i coal ＝X iA +X iM +X iV +X iFC ---------------------(2)
In the middle of
X i coal ＝-μ Coal .ρ Coal D-value of radiation absorption by coal
X iA ＝-μ A .ρ A d.A ash absorption of radiation values
X iM ＝μ M .ρ M d.M moisture absorption of radiation values
X iV ＝μ V .ρ V d.V volatile absorption of radiation values
X iFC ＝-μ FC .ρ FC FC-full carbon radiation absorption value
Mu of each component of the coal A ρ A 、μ M ρ M 、μ V ρ V 、μ FC ρ FC Are all known constants
In the case where d=constant or d is measured by a thickness gauge, X i coal The change is only determined by the percentage change of A, M, V, FC relative to each other, namely:
X i coal ＝f(A、M、V、FC)————(3)
Measuring coal or coal sample X i coal The value can be analyzed to obtain X at the moment i coal Corresponding A, M, V, FC value
(3) The formula is the theoretical basis of the radiant type component measuring method
2. By X i coal Based on =f (A, M, V, FC), according to X of coal i coal And ashing method detection A Label (C) 、M Label (C) 、V Label (C) 、FC Label (C) Q and label (C) Numerical values.
Analysis of X using big data technique i coal And A is a Label (C) 、M Label (C) 、V Label (C) 、FC Label (C) Q and label (C) With FC Label (C) The law of variation is:
A label (C) ＝f 1 (X i coal )M Label (C) ＝f 2 (X i coal )V Label (C) ＝f 3 (X i coal )FC Label (C) ＝f 4 (X i coal ) Q and label (C) ＝f 5 (FC Label (C) )
Adopting a calibration method to establish A, M, V, FC and X i coal And measurement parameter data and a measurement mathematical model between Q and FC,
the mathematical model is as follows:
A＝a N +b N X i coal (N＝1，2，3……NA)
M＝c N +d N X i coal (N＝1，2，3……NM)
V＝E N +F N X i coal (N＝1，2，3……NV)
FC＝G N +H N X i coal (N＝1，2，3……NFC)
Q＝i N +j N X FC coal (N＝1，2，3……NQ)
In which a is N 、b N 、c N 、d N 、E N 、F N 、G N 、H N 、i N 、j N -is a measurement parameter in a measurement parameter database
NA, NM, NV, NFC, NQ-is the number of measured parameters of ash, moisture, volatile, whole char and calorific value.
3. According to coal X i coal The measurement parameter database is used for establishing an identification software package by adopting an identification technology;
4. constructing a radiation type coal component measuring instrument to measure the coal or coal sample X i coal Value according to coal or coal sample X i coal Combining the measured parameter database, adopting the identification software package pair X i coal Identifying and comparing X in the measurement parameter database i coal Corresponding A, M, V, FC and Q measurement parameters, the calculation is:
A＝a N +b N X i coal (n=1 or 2 … … or=na)
M＝c N +d N X i coal (n=1 or 2 … … or=nm)
V＝E N +F N X i coal (n=1 or 2 … … or=nv)
FC＝G N +H N X i coal (n=1 or 2 … … or=nfc)
Q＝i N +j N X FC coal (n=1 or 2 … … or=nq)
In which a is N 、b N 、c N 、d N 、E N 、F N 、G N 、H N 、i N 、j N -is a measurement parameter in a measurement parameter database
NA, NM, NV, NFC, NQ-is the number of ash, moisture, volatile, full char and calorific value measurement parameters.
The constructed radiation type coal component measuring instrument is characterized in that an electromagnetic radiation source (1-1) of the radiation type measuring device is an X-ray source, a gamma-ray source, a microwave radiation source or a laser radiation source in a light energy area, and a radiation detector (1-2) of the radiation type measuring device (1) is an X-ray detector corresponding to the electromagnetic radiation source (1-1), a gamma-ray detector, a microwave receiver or a laser receiver;
the constructed radiation type coal component measuring instrument is characterized in that the device (2) is a belt conveyor, a screw conveyor, a measuring pipe and screw conveyor, a straight reciprocating type conveying device or a wind power pipeline conveyor;
the constructed radiation type coal ash measuring instrument is characterized by further comprising a displacement type thickness measuring instrument or a laser type thickness measuring instrument.
The various types of radiant coal constituent measuring instruments can be formed as shown in fig. 3, 4, 5, 6 and 7 due to different types of radiant measuring devices, coal or coal sample conveying devices and sampling devices of the constructed radiant coal constituent measuring instruments.
Drawings
FIG. 1 is a schematic view of an electromagnetic radiation source and radiation detector installation
FIG. 1 (a) schematic diagram of a transmission type measurement installation
1-1 electromagnetic radiation source
1-2-radiation detector
2-coal or coal sample conveying device
6-coal or coal sample to be measured
FIG. 1 (b) schematic diagram of a reflective measurement installation
1-1 electromagnetic radiation source
1-2-radiation detector
2-coal or coal sample conveying device
6-coal or coal sample to be measured
FIG. 2 is a schematic diagram of a radiation type coal constituent measuring instrument
1-radiation type measuring device
1-1 electromagnetic radiation source
1-2-radiation detector
1-3 mounting frame
2-coal or coal sample conveying device
3-sampling device
3-1-sampler
3-3 shaping hopper
4-data acquisition controller
5-conveying coal flows on production lines
6-coal or coal sample to be measured
FIG. 3 is a schematic drawing of an on-line measurement of a radiant coal constituent measuring instrument
1-radiation type measuring device
1-1 the electromagnetic radiation source is an X-ray source
1-2-the radiation detector is N a I scintillation counter
2-the coal or coal sample conveying device is a belt conveyor
3-sampling device
3-1-material guiding pipe
3-2 gate
3-3 plastic hopper
4-data acquisition controller
5-coal flow conveyed by production line
6-coal or coal sample to be measured
FIG. 4 is a schematic diagram of offline measurement of a radiant coal constituent measuring instrument
1-radiation type measuring device
1-1 the electromagnetic radiation source is an X-ray source
1-2-the radiation detector is an X-ray semiconductor array detector
2-straight reciprocating type conveying device
3-sampling device
3-4-coal sample sampler
3-5-weighing coal sample vessel
4-data acquisition controller
5-coal flow transported in production
FIG. 5 schematic diagram of measuring pulverized coal components by radiation type coal component measuring instrument
1-radiation type measuring device
1-1 the electromagnetic radiation source is an X-ray source
1-2-the radiation detector being a scintillation counter
2-the coal or coal sample conveying device is a measuring tube and a screw conveyer
2-1 measuring tube
2-screw conveyer
3-sampling device
3-6-screw conveyer
3-7-Gate
4-data acquisition controller
7-coal powder for production and transportation
FIG. 6 is a schematic diagram of the radiation type coal component measuring instrument for measuring the pulverized coal components of the air supply pipeline
1-radiation type measuring device
1-the electromagnetic radiation source is a gamma ray source
2-the radiation detector being a xenon-charged ionization chamber
2-the conveying device is a wind pipeline conveyor
2-1-wind power coal powder conveying pipeline
2-2 wind power
FIG. 7 is a schematic diagram of a coal or coal sample thickness measurement for a coal constituent measuring instrument
7-thickness measuring instrument
Detailed Description
The measurement principle of the transmission type coal component measuring instrument is that a beam of radiation rays emitted by an electromagnetic radiation source is utilized to measure the components of the coal or coal sample through the change of the absorption or scattering degree of the measured coal or coal sample to the radiation rays (or wave energy), and a transmission type measurement (absorption) and a reflection type measurement (scattering) schematic diagram is given in fig. 1.
Fig. 2 is a schematic diagram of the construction of the radiant coal constituent measuring instrument, the functional roles and the installation modes of the construction parts are given in the specification, and fig. 2 is a technical scheme of the constructed radiant coal constituent measuring instrument.
FIG. 3 shows an embodiment of the on-line measurement of the radiant coal constituent measuring instrument, wherein the electromagnetic radiation source is an X-ray source, which has better safety, and the radiation detector is an N-ray source α The I scintillation counter has high detection efficiency, the X-ray source intensity can be reduced, the coal and coal sample conveying device (2) is a belt conveyor, a gate (3-2) in a sampling device (3) is used as a sampler, the gate (3-2) is opened and closed at regular time to perform time-based sampling, and a shaping hopper (3-3) is used for shaping the coal or coal sample output by the shaping hopper to ensure that the thickness d=constant of the output coal or coal sample.
FIG. 4 is a specific embodiment of an off-line measurement of an conveyor-type coal constituent measuring instrument, the electromagnetic radiation source (1-1) of the radiation measuring device being an X-ray source, and the radiation detector (1-2) being an X-ray semiconductor array detector; the coal or coal sample conveying device (2) is a straight reciprocating type conveying device; the coal sample sampler (3-4) of the sampling device (3) is a mechanical screw type sampler which can randomly sample trains, automobiles, ships, coal yards, coal piles and coal in factories; the weighing and loading sample vessels (3-5) of the sampling device (3) are used for weighing and loading the test coal samples, and after the weighing and loading sample vessels are filled with the coal samples, the weighing and loading sample vessels are scraped (at the position A) and then are placed at the position B of the linear reciprocating conveying device (2) for measurement.
FIG. 5 shows an embodiment of the pulverized coal component measuring apparatus for measuring pulverized coal components, in which all the measuring processes are performed in a closed system, and the electromagnetic radiation source (1-1) of the radiation measuring device (1) is an X-ray source or gamma raysThe source radiation detector (1-2) is of large diameter N α The I scintillation counter, the coal or coal sample conveyor (2) is by survey buret (2-1) and screw conveyer (2-2) constitution, and sampling device (3) comprises screw conveyer (3-6) and gate (3-7), and screw conveyer (3-6) get material to buggy (7) in the pipeline, and gate (3-7) are opened at regular time, are closed and are carried out time sampling measurement.
FIG. 6 shows a measuring air duct of a radiation type coal component measuring instrumentIn the embodiment of the composition of the pulverized coal, the electromagnetic radiation source (1-1) of the radiation type measuring device (1) isThe radiation source has stronger penetrating power, the radiation ray detector is a high-sensitivity xenon-filled ionization chamber, and the coal or coal sample conveying device (2) is a wind conveying pipeline.
FIG. 7 is a schematic diagram of a radiation type coal component measuring instrument for measuring the thickness of a coal or a coal sample in an on-line measurement, wherein the thickness measuring instrument measures the thickness d of the coal or the coal sample, and the thickness d is used for measuring the thickness X of the coal or the coal sample i The coal is corrected to improve the measurement accuracy.
Various embodiments or modifications will occur to those skilled in the art based on the present patent concepts and the functional roles of the various apparatus and application specific conditions in the technical solutions of the present patent.
The technical effects are as follows: the radiation type coal component is measured on line or off line, ash, moisture, volatile matters, full carbon and heat productivity are comprehensively, rapidly and accurately measured, important basis can be provided for coal production, processing, utilization and production management, reliable data support can be provided for production process control, and the radiation type coal component has important significance for improving product quality, improving coal utilization rate, improving production management level, improving power generation efficiency, reducing consumption and reducing emission.
Claims (5)
1. A radiation type coal component measuring instrument is composed of a radiation type measuring device (1), a coal or coal sample conveying device (2), a sampling device (3) and a data acquisition controller (4);
the radiation type measuring device (1) comprises an electromagnetic radiation source (1-1), a radiation detector (1-2) and a mounting frame (1-3), wherein the electromagnetic radiation source and the radiation detector are respectively arranged above and below or on two sides of a coal or coal sample conveyor (2) for transmission type measurement, or arranged above (on the same side as) the coal or coal sample conveyor for reflection type measurement in the straight line direction of the incident angle and the reflection angle of radiation rays, and the radiation detector (1-2) is used for measuring the change of the intensity (wave energy) of the radiation rays when the coal or coal sample and the coal or coal sample are not present and outputting an electric signal U when the coal or coal sample is present i And no coal orOutput electric signal U when coal sample 0 ；
The coal or coal sample conveying device (2) is arranged between the electromagnetic radiation source (1-1) and the radiation detector (1-2) or below the electromagnetic radiation source and the radiation detector and is used for conveying the coal or coal sample to a measuring area of the radiation type measuring device for measurement;
the sampling device (3) is arranged above the coal or coal sample conveying device (2) or is located on the coal or coal sample conveying device (2) and is used for collecting the coal or coal sample to be tested; a data acquisition controller (4) for receiving the electric signal U output by the radiation detector i 、U 0 And calculating the components of the coal or the coal sample according to a mathematical model: A. m, V, FC and Q, wherein the mathematical model is established according to a radial component measurement method, and is:
A＝a N +b N X i coal (n=1, 2,3 … … or=na)
M＝c N +d N X i coal (n=1, 2,3 … … or=nm)
V＝E N +F N X i coal (n=1, 2,3 … … or=nv)
FC＝G N +H N X i coal (n=1, 2,3 … … or=nfc)
In which a is N 、b N 、c N 、d N 、E N 、F N 、G N 、H N 、i N 、-the measurement parameters established according to the method of measurement of the radiation-type composition, the measurement parameters in the database;
NA, NM, NV, NFC, NQ-is the number of ash, moisture, volatile, full carbon and calorific value measurement parameters;
is the radiation absorption value of coal or coal sample
A. M, V, FC-ingredients of coal or coal samples: ash, moisture, volatile matter and full carbon, in percentage
Q-coal or coal sample heating value.
2. The radiant coal constituent measuring apparatus as claimed in claim 1, wherein the radiant constituent measuring method comprises the steps of:
1) Theoretical basis for determining radiation type component measuring method
The principle of absorption according to the interaction of substances and radiation rays is as follows:
U i ＝U 0 e-μρd
wherein: u (U) i -there is a substance radiation detector output signal;
U 0 -no substance radiation detector output signal;
-the radiation values absorbed by the substance;
mu-the radiation absorption coefficient of the substance;
ρ -density of matter
d-thickness of substance
For substances composed of multiple components, such as coal, the absorption of radiation by the coal is:
X i coal ＝X iA +X iM +X iV +X iFC ————(2)
Wherein:
X i coal ＝-μ Coal ρ Coal d-radiation value absorbed by coal
X iA ＝-μ A ρ A d A value of radiation absorbed by ash
X iM ＝-μ M ρ M d M-radiation values of moisture absorption
X iV ＝-μ V ρ V d V value of radiation absorbed by volatile components
X iFC ＝-μ FC ρ FC dFC-radiation ray value of full carbon absorption
Mu of various components of coal A ρ A 、μ M ρ M 、μ V ρ V 、μ FC ρ FC Are all known constants
In the case of d=constant or when d is measured (d is a known number), X i coal Depending on the percentage change between A, M, V, FC, namely:
X i coal ＝f(A、M、V、FC)——(3)
Measuring coal or coal sample X by measuring apparatus i coal The value can be analyzed to obtain X at the moment i coal Corresponding A, M, V, FC value
(3) The formula is the theoretical basis of the radiant type component measuring method
2) By X i coal Based on =f (A, M, V, FC), according to X of coal i coal And ashing method detection A Label (C) 、M Label (C) 、V Label (C) 、FC Label (C) Q and label (C) A numerical value;
analysis of X using big data technique i coal And A is a Label (C) 、M Label (C) 、V Label (C) 、FC Label (C) Q and label (C) With FC Label (C) The law of variation is:
A label (C) ＝f 1 (X i coal ) M Label (C) ＝f 2 (X i coal ) V Label (C) ＝f 3 (X i coal ) FC Label (C) ＝f 4 (X i coal ) And
Q Label (C) ＝f 5 (FC Label (C) )；
Build A, M, V, FC and X by calibration method i coal And Q and FC, a database of measured parameters and a mathematical model thereof,
the mathematical model is:
A＝a N +b N X i coal (N＝1，2，3……NA)
M＝c N +d N X i coal (N＝1，2，3……NM)
V＝E N +F N X i coal (N＝1，2，3……NV)
FC＝G N +H N X i coal (N＝1，2，3……NFC)
In which a is N 、b N 、c N 、d N 、E N 、F N 、G N 、H N 、i N 、-is a measurement parameter in a measurement parameter database
NA, NM, NV, NFC, NQ-is the number of ash, moisture, volatile, full char and calorific value measurement parameters.
3) According to X of coal i coal And a measurement parameter database, and an identification technology is adopted to establish a pair X i coal Identifying a software package;
4) Constructing a radiation type coal component measuring instrument to measure the coal or coal sample X i coal Value according to X of coal or coal sample i coal And combining with a measurement parameter database, adopting an identification software package pair X i coal Identifying and comparing X in the measurement parameter database i coal Corresponding A, M, V, FC and Q measurement parameters, the calculation is:
A＝a N +b N X i coal (n=1 or 2 … … or=na)
M＝c N +d N X i coal (n=1 or 2 … … or=nm)
V＝E N +F N X i coal (n=1 or 2 … … or=nv)
FC＝G N +H N X i coal (n=1 or 2 … … or=nfc)
In which a is N 、b N 、c N 、d N 、E N 、F N 、G N 、H N 、i N 、-is a measurement parameter in a measurement parameter database
NA, NM, NV, NFC, NQ-is the number of ash, moisture, volatile, full char and calorific value measurement parameters.
3. The radiant coal constituent measuring instrument according to claim 1; the radiation type measuring device is characterized in that an electromagnetic radiation source (1-1) of the radiation type measuring device (1) is an X-ray source, or a gamma-ray source, or a microwave radiation source, or a laser radiation source in a light energy area, and a radiation detector (1-2) of the radiation type measuring device (1) is an X-ray detector, or a gamma-ray detector, or a microwave receiver, or a laser receiver corresponding to the electromagnetic radiation source (1-1).
4. The radiant coal constituent measuring apparatus according to claim 1, wherein the coal or coal sample conveying device (2) is a belt conveyor, a screw conveyor, a measuring tube plus screw conveyor, a straight reciprocating conveyor, or a pneumatic pipe conveyor.
5. The radiant coal constituent measuring apparatus as claimed in claim 1, further comprising a displacement thickness measuring apparatus or a laser thickness measuring apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210919084.3A CN117517360A (en) | 2022-07-27 | 2022-07-27 | Radiant type coal component measuring instrument and radiant type component measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210919084.3A CN117517360A (en) | 2022-07-27 | 2022-07-27 | Radiant type coal component measuring instrument and radiant type component measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117517360A true CN117517360A (en) | 2024-02-06 |
Family
ID=89748291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210919084.3A Pending CN117517360A (en) | 2022-07-27 | 2022-07-27 | Radiant type coal component measuring instrument and radiant type component measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117517360A (en) |
-
2022
- 2022-07-27 CN CN202210919084.3A patent/CN117517360A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101349661B (en) | Method for on-line detecting coal ashes on belt | |
| CN102519993B (en) | Reflection-type x-ray device for detecting ash content and heat productivity of coal and detection method | |
| CN201063033Y (en) | Continuous on-line detecting device for measuring thermal value of coaly | |
| CN102269718B (en) | X-ray ash content measurement device and method | |
| WO2020211495A1 (en) | Coal consumption online measurement system | |
| CN102200434A (en) | Thickness and convexity detection device for plates and strips | |
| KR20210053591A (en) | Radioactivity Measuring and Classifying System for Large Scale Radioactive Waste | |
| CN101907582B (en) | Full section scanning on-line detection device | |
| JP2020085467A (en) | Physical property inspection device | |
| BR112014019878B1 (en) | method for determining the concentration of an element in a material | |
| CN201184870Y (en) | Movable apparatus for detecting neutron-gamma ray explosive substance | |
| Sang et al. | ANN coupled with Monte Carlo simulation for predicting the concentration of acids | |
| US2890347A (en) | Comparing and measuring values by use of x-rays | |
| CN117517360A (en) | Radiant type coal component measuring instrument and radiant type component measuring method | |
| CN103076057B (en) | A kind of multiphase flow flowmeter | |
| CN202230038U (en) | X-ray coal ash content measuring device | |
| US10175382B2 (en) | Identification of materials | |
| Van et al. | Radiation attenuation of pulverised fuel in pneumatic conveying systems | |
| CN201780277U (en) | On-line detection device with full-section scanning effect | |
| CN112557426B (en) | Measuring instrument for heat value, ash content, moisture content and carbon of X-ray coal and measuring method thereof | |
| Brodgesell et al. | Moisture in solids | |
| CN201666882U (en) | Coal ash content measuring device suitable for steel belts | |
| KR101239770B1 (en) | A liquid level meter using gamma rays | |
| CN202092619U (en) | Device for detecting thickness and convexity of profile | |
| CN115704755A (en) | Weight measuring type coal quality parameter on-line or off-line measuring instrument and measuring method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |