CN116773398A - Online measuring instrument or offline measuring instrument for density type coal quality parameters and measuring method - Google Patents
Online measuring instrument or offline measuring instrument for density type coal quality parameters and measuring method Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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Abstract
The density type coal quality parameter on-line measuring instrument or coal quality parameter off-line measuring instrument is composed of a coal or coal sample density measuring device (comprising a weight measuring device and a thickness measuring device), a conveying device, a sampling device and a data acquisition controller. According to the density value measured by the density measuring device of the coal and the coal sample and the industrial analysis method of GB/T212-2008 coal, the ash method is used for detecting: a density type measuring method established by ash (A), moisture (M), volatile (V) and Full Carbon (FC) and a measuring mathematical model established by the method realize on-line or off-line measurement of coal quality parameters. The online measuring instrument or the offline measuring instrument for the coal quality parameters has the characteristics of simple operation, quick measurement, high measuring accuracy, strong adaptability to coal variety change and the like, can be applied to various fields such as coal production, processing, application and the like, can provide important basis for automatic control and production management in the processes of coal production, processing and technology, and has important significance for improving the quality of coal products and the production management level.
Description
Technical Field
The invention relates to coal quality parameters determined by an industrial analysis method of coal: the measurement of ash (A), moisture (M) and Full Carbon (FC) volatile (V) particularly relates to the measurement of all coal quality parameters A, M, V, FC determined by the coal industry analysis method by adopting a method for measuring the density of coal or coal samples.
Background
The method has the advantages that the method is large in coal, the yield is the first in the world, the main energy sources in China are realized, the coal distribution in China is wide, the production areas are multiple, the coal types are various, the complex change of the coal quality is large, many and great difficulties are brought to the production, the processing and the utilization of the coal, the online measurement and the offline rapid measurement of the coal quality parameters can provide necessary basis for the automatic control of the industrial production process in the fields of coal production, processing, utilization and the like, and the method has important significance for improving the quality of coal products, improving the utilization rate of the coal, reducing the consumption of the coal and reducing the emission of pollutants.
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 method and equipment are as follows: neutron induction transient method and its detection equipment, neutron activation method and its equipment, X-ray fluorescence method and its equipment. Due to the poor radiation safety of the method and the equipment, the method and the equipment are complex, and the cost, the price and the like of the equipment are high, so that the application is less. And secondly, determining that the coal quality consists of four components of ash (A), moisture (M), full Carbon (FC) and volatile (V) by an industrial analysis method of coal. The method and the equipment for detecting the coal quality parameters (A, M, FC, V) of the current industrial analysis method mainly comprise the following steps:
the method for realizing off-line static measurement of coal quality parameters such as ash (A), moisture (M), volatile matters (V) and Full Carbon (FC) according to the industrial analytical method ashing method of GB/T212-2008 coal is the most important test method at present, and confirms that the coal quality parameter value detected by the method is a standard value, so that the method is widely applied. 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 variety change.
The method and the equipment for detecting the ash content, the moisture and the heat value of the X-ray on-line detection have not been widely applied because of late research and development, and the method and the equipment for detecting the ash content, the moisture and the heat value of the X-ray on-line detection adopt X-rays to measure the carbon content (A), adopt a microwave moisture meter to measure the moisture (M) and calculate the heat value (Q) according to A, M.
At present, no matter overseas or domestic methods for measuring the density of coal or coal samples are adopted to realize the coal quality parameters: on-line or off-line measurement of ash (a), moisture (M), volatiles (V), full Char (FC) and equipment therefor.
Disclosure of Invention
Technical problem that this patent solved:
1. establishing a coal quality parameter density measurement method;
(1) Determining a theoretical basis of a density measurement method;
(2) According to the density rho of the coal sample Coal Establishing a measurement mathematical model;
2. construction of density type coal quality parameter on-line measuring instrument or coal quality parameter off-line measuring instrument
Industrial analysis of coal determines that coal is composed of four components, ash (A), moisture (M), volatile (V), and Full Char (FC), A, M, V, FC means the respective weights W of the components A 、W M 、W V 、W FC And the total weight W thereof Coal The mass percentage of the composition is as follows:
and a+m+v+fc=100%
W Coal ＝W A +W M +W V +W FC
Due to the different sizes of the components A, M, V, FC constituting the coal and the specific gravity (density) ρ of the components A 、ρ M 、ρ V 、ρ FC Different, thus constituting the weight W of each component A 、W M 、W V 、W FC Also different is:
W A ＝f(ρ A ，A)W M ＝fρ M ，M)
W V ＝f(ρ V ，V)W FC ＝f(ρ FC FC) are binary functions
W A 、W M 、W V 、W FC Different and cause W Coal Different from each other.
W Coal ＝f(W A ，W M ，W V ，W FC ) Is a quaternary function
From this, it can be seen that W was measured Coal W and W A 、W M 、W V 、W FC Is a key point for realizing the measurement of the coal quality parameter A, M, V, FC, but W Coal W and W A 、W M 、W V 、W FC The complex change relation and A, M, V, FC variables thereof are mutually influenced, so that the measurement difficulty is caused.
The patent uses the density ρ of the coal sample Coal Based on the method, A, M, V, FC on-line or off-line measurement is realized by adopting a density measurement method.
1. Density measuring method
1. The theoretical basis of the density measurement method,
the density measuring device measures the density value rho of the coal sample Coal A, M, V, FC of the coal sample was detected according to GB/T212-2008 ashing method and W was given Coal ＝W A +W M +W V +W FC --------(1)
(1) Equal sign divided by the same volume or unit volume on both sidesThen there are:
(2) Indicating unit volumeWeight of coal sample W in Coal I.e. density ρ Coal Equal to the sum of the weights of the components in unit volume at a coal quality parameter of A, M, V, FC:
and is equal to the density rho of each component A 、ρ M 、ρ V 、ρ FC The product of the mass percent A, M, V, FC of each component is as follows:
then the formula (2) is
Because ρ is A 、ρ M 、ρ V 、ρ FC -known constant
Therefore ρ Coal Is a function of A, M, V, FC ρ Coal The change in (c) represents a change in the mass percent of A, M, V, FC to each other, and a+m+v+fc=100%.
2. Constructing a coal or coal sample density measuring device to realize the density rho of the coal or coal sample Coal On-line or off-line measurement of (a)
3. Establishing a measurement mathematical model according to a density measurement method
According to density measurement, i.e. according to ρ Coal ρ Coal ＝ρ A .A+ρ M .M+ρ V .V+ρ FC .F C And A, M, V, FC detected by an ashing method is used as a standard value, and a calibration method is adopted to establish a measurement mathematical model.
Measuring a coal sample density value rho according to a coal sample density measuring device Coal And detecting the coal quality parameter of the coal sample as A, M, V, FC according to the GB/T212-2008 ashing method and calculating ρ A .A 1 、ρ M .M 1 、ρ V .V 1 、ρ FC .FC 1 Further, a set of measurement data is obtained, the above measurement is performed N times, and N sets of measurement data are shown in Table 1
Table 1 of measurement data
According to table 1, a calibration method is used, i.e. a calibration curve (optionally different calibration curves) is selected, such as a calibration curve: a=f (ρ) Coal )，M＝f(ρ Coal )，V＝f(ρ Coal )，FC＝f(ρ Coal ) Performing calibration to obtain the change relation of a calibration curve, and performing linear fitting to obtain a measurement mathematical model:
A measuring ＝a 1 +b 1 ρ Coal ------(1)
M Measuring ＝C 1 +d 1 ρ Coal -----(2)
V Measuring ＝E 1 +F 1 ρ Coal -----(3)
FC Measuring ＝G 1 +H 1 ρ Coal -----(4)
In which a is 1 b 1 、C 1 d 1 、E 1 F 1 、G 1 H 1 And the calibration coefficients are all the same.
Or if a calibration curve is selected: ρ A .A＝f(ρ Coal )，ρ M .M＝f(ρ Coal )，
ρ V .V＝f(ρ Coal )，ρ FC .F C ＝f(ρ Coal ) The calibration is carried out, the calibration curve change relation can be obtained, and the measurement mathematical model can be obtained by carrying out linear fitting, and is as follows:
ρ A .A＝a 2 +b 2 ρ coal
ρ M .M＝c 2 +d 2 ρ Coal
ρ V .V＝E 2 +F 2 ρ Coal
ρ FC .FC＝G 2 +H 2 ρ Coal
In which a is 2 b 2 、C 2 d 2 、E 2 F 2 、G 2 H 2 Are all calibration coefficients
4. Density value ρ measured by density measuring device Coal The value is calculated according to the measurement mathematics (formulas (1), (2), (3), (4) or (5), (6), (7) and (8)) to obtain the coal quality parameter A Measuring 、M Measuring 、V Measuring 、FC Measuring 。
In summary, the method for measuring the density of the coal quality parameter is characterized by comprising the following steps:
1. a, M, V, FC and coal sample density ρ detected according to GB/T212-2008 industrial analysis method of coal Coal Establishing coal quality parameters A, M, V, FC and ρ Coal Relationship between:
ρ coal ＝ρ A A+ρ M M+ρ V V+ρ FC FC
Determining the rho of the coal sample Coal A, M, V, FC interrelationships are characterized.
2. Constructing a coal or coal sample density measuring device to realize the density rho of the coal or coal sample Coal Is an online or offline measurement of (a).
3. Based on the measured density ρ Coal And establishing a measurement mathematical model.
According to ρ Coal ρ Coal ＝ρ A A+ρ M M+ρ V V+ρ FC FC and A, M, V, FC detected according to GB/T212-2008 ashing method are used as standard values, and a calibration method is adopted to establish a measurement mathematical model.
4. Density value ρ measured in real time according to density measuring device Coal Calculating the coal quality parameter A according to the measurement mathematical model Measuring 、M Measuring 、V Measuring 、FC Measuring And the on-line or off-line measurement of the coal quality parameters is realized.
2. Construction of density type coal quality parameter on-line measuring instrument or coal quality parameter off-line measuring instrument
An on-line measuring instrument for density type coal quality parameters or an off-line measuring instrument for coal quality parameters is characterized in that:
the coal quality parameter on-line measuring instrument is composed of a weight measuring device (4-1), a thickness measuring device (4-2), a conveying device (3), a sampling device (2) and a data acquisition controller (5).
The weight measuring device (4-1) is arranged below or on two sides of the coal or coal sample conveying device (3) and is fixed on the frame and used for measuring the weight W of the coal or coal sample conveyed by the conveying device (3) Coal ；
A thickness measuring device (4-2) arranged above the conveying device (3) and used for measuring the thickness d of the coal or the coal sample conveyed by the conveying device (3) Coal Thereby obtaining the volume of the coal or the coal sample(/>S-bottom area) and Density->
The conveying device (3) is arranged between the weight measuring device (4-1) and the thickness measuring device (4-2) and is used for conveying coal or coal samples;
the sampling device (2) is arranged above the conveying device (3) or is arranged on the conveying device, and is used for continuously collecting or collecting coal samples conveyed in the production process on a time basis and conveying the coal samples to the conveying device (3);
a data acquisition controller (5) for receiving the weight signal W of the weight measuring device (4-1) Coal Thickness signal d of thickness measuring device (4-2) Coal And according to the measured density ρ Coal Calculating coal quality parameters by using a measurement mathematical model built by the density measurement method: ash (a) moisture (M), ash fraction (V), full Char (FC).
Or the coal quality parameter off-line measuring instrument is composed of a weight measuring device (8-1), a thickness measuring device (8-2), a weighing coal sample vessel (7), a sampler (9) and a data acquisition controller (10).
A weight measuring device (8-1) which is arranged on the bottom plate of the instrument frame and is used for measuring the weight W of the test coal sample in the weighing coal sample vessel (7) Coal ；
A thickness measuring device (8-2) which is arranged on the upper frame of the instrument and is used for measuring the thickness d of the tested coal sample in the weighing coal sample vessel (7) Coal Thereby obtaining the volume of the coal sample(/>S-bottom area) and Density->
A coal sample weighing vessel (7) for weighing and loading a test coal sample;
the sampler (9) is used for collecting a coal sample of a coal quality parameter measurement point to be detected;
a data acquisition controller (10) for receiving the weight signal W of the weight measuring device (8-1) Coal Thickness signal d of thickness measuring device (8-2) Coal And according to the measured density ρ Coal Calculating coal quality parameters by using a measurement mathematical model established by the density measurement method: ash (a), moisture (M), volatile (V), full Char (FC).
FIG. 1 shows a schematic diagram of an on-line density coal quality parameter measuring instrument.
Fig. 2 shows a schematic diagram of an offline measuring instrument for density coal parameters, and A, B, C in the drawing is a position for loading, weighing and thickness measuring of a vessel (7).
The coal or coal sample conveying device (3) of the coal quality parameter online measuring instrument is characterized in that the conveying device is a belt conveyor, a screw conveyor, a measuring pipe and a screw conveyor, or a wind power conveyor; the weight measuring device (4-1) of the coal quality parameter on-line measuring instrument is characterized in that the weight measuring device is an electronic belt scale, or an X-ray scale or a laser scale; the thickness measuring device (4-2) of the coal quality parameter on-line measuring instrument is characterized in that the thickness measuring device is a compression roller type angular displacement thickness gauge, a grating type displacement sensor position finder, a laser type displacement sensor distance finder or an ultrasonic type displacement sensor distance finder; the thickness measuring device (4-2) of the coal quality parameter on-line measuring instrument is characterized by further comprising a coal or coal sample shaping device, wherein the shaping device comprises a shaping hopper (4-2-A), a side plate (4-2-B) and a pressing shaft (4-2-C).
FIG. 3 shows a schematic diagram of the shaping device
The coal quality parameter off-line measuring instrument is characterized in that the weight measuring device (8-1) is a high-precision electronic scale, an electronic balance or a high-precision weight measuring instrument; the thickness measuring device (8-2) of the coal quality parameter offline measuring instrument is characterized by comprising a pressing device (8-2-A) and a displacement measuring device (8-2-B), wherein the pressing device (8-2-A) comprises a driver, a screw rod, a sliding block track, a pressing block and a pressure sensor, and the displacement measuring device (8-2-B) comprises a connecting rod (8-2-B) connected with the pressing block of the pressing device 1 ) And a displacement measuring device (8-2-B) 2 ) The composition is formed. Driver (8-2-A) 1 ) Driving screw (8-2-A) 2 ) Rotating, the screw rod drives the slide block (8-2-A) 3 ) On its track (8-2-A 4 ) Up and down, and the slide block drives the pressing block (8-2-A) 5 ) Moves up and down to symmetrically load and test the coal sample in the coal sample vessel (7) to apply pressure, and the pressure is measured by a pressure sensor (8-2-A) 6 ) And (5) measuring. Briquetting (8-2-A) 6 ) On which a connecting rod (8-2-B) for displaying the position thereof is fixed 1 ) Displacement measuring device (8-2-B) 2 ) Butt connecting rod (8-2-B) 1 ) The displacement is measured, thus obtaining the thickness d of the coal sample in the weighing and loading test coal sample device (7) Coal . FIG. 4 shows a schematic view of a coal sample thickness measuring device (4-2) with a pressure applying device;
the density type coal quality parameter online measuring instrument or offline measuring instrument is characterized in that the measuring mathematical model is established according to a coal quality parameter density type measuring method, and the measuring mathematical model is as follows:
A measuring ＝α 1 +b 1 ρ Coal …(1)
M Measuring ＝c 1 +d 1 ρ Coal …(2)
V Measuring ＝E 1 +F 1 ρ Coal …(3)
FC Measuring ＝G 1 +H 1 ρ Coal …(4)
Alpha in the formula 1 b 1 、α 2 b 2 、c 1 d 1 、c 2 d 2 Are all calibration coefficients
Or ρ A A＝α 2 +b 2 ρ Coal
ρ M M＝c 2 +b 2 ρ Coal
ρ V V＝E 2 +F 2 ρ Coal
ρ FC FC＝G 2 +H 2 ρ Coal
In E 1 F 1 、E 2 F 2 、E 1 F 1 、G 2 F 2 Are all calibration coefficients
Drawings
FIG. 1 is a schematic diagram of an on-line measuring instrument for density type coal parameters
1-coal transportation
2-sampling device
2-1 sampler
2-3 hopper
3-coal or coal sample conveying device
4-Density measuring device
4-1 weight measuring device
4-2 thickness measuring device
5-data acquisition controller
6-coal or coal sample
FIG. 2 is a schematic diagram of an offline measuring instrument for density type coal parameters
7-weighing and loading test coal sample vessel
8-density measuring device
8-1 weight measuring device
8-2 thickness measuring device
8-2-A pressurizing device
8-2-B displacement measuring device
9-sampler
10-data acquisition controller
FIG. 3 schematic diagram of a coal or coal sample shaping device
4-2-A shaping device
4-2-A 1 Shaping hopper
4-2-A 2 Side plate
4-2-A 3 Compression roller
FIG. 4 is a schematic view of a thickness measuring device with a pressure applicator
8-2 thickness measuring device
8-2-A pressurizing device
8-2-A 1 Driver(s)
8-2-A 2 Screw rod
8-2-A 3 Sliding block
8-2-A 4 Slider rail
8-2-A 5 Briquetting machine
8-2-A 6 Pressure sensor
8-2-B displacement measuring device
8-2-B 1 Connecting rod
8-2-B 2 Displacement sensor measuring device
FIG. 5 is a schematic diagram of an on-line measuring instrument for coal quality parameters by using an X-ray scale for weighing
1-coal flow conveyed by conveyer belt
2-sampling device
2-1 sampler (screw conveyer)
2-2 crusher
2-3 hopper
3-conveying device
3-1 measuring tube
3-2 screw conveyor
4-1 weight measuring device (X-ray scale)
4-1-A X ray source
4-1-B X ray detector
FIG. 6 is a schematic diagram of an on-line measuring instrument for coal quality parameters by using an electronic belt scale
4-2 thickness measuring device
4-2-A shaping device
4-2-A 1 Shaping hopper
4-2-A 2 Side plate
4-2-A 3 Compression roller
4-1 electronic belt scale
4-1-C carrier roller
4-1-D pressure sensor
FIG. 7 schematic diagram of on-line measuring instrument for coal quality parameters of pulverized coal in air supply pipeline of power station
20-coal feeder
21-coal mill
22-air supply motor
23-wind coal powder feeding pipeline
23A, 23B, 23C, 23D branch air supply pipeline
4-1-X-ray scale
4-1-A X ray source
4-1-B X ray control and measuring device
Detailed Description
The implementation of the density type coal quality parameter on-line measuring instrument is further described below with reference to the accompanying drawings, and the density type coal quality parameter on-line measuring instrument is implemented in two modes, namely continuous sampling or time base sampling is carried out on site production and conveying coal by adopting a sampling device to realize coal quality parameter measurement, and the density type coal quality parameter on-line measuring instrument is directly used for on-line measuring coal conveyed in the production process. Fig. 1 and 5 show a schematic diagram of an on-line measuring instrument for coal quality parameters in a sampling mode. Fig. 6 and 7 show schematic diagrams of an on-line measuring instrument for coal quality parameters, which is used for directly measuring coal conveyed in production, and fig. 2 shows schematic diagrams of an off-line measuring instrument for coal quality parameters. FIG. 6 is a recommended coal quality parameter on-line measurementIn a preferred embodiment of the apparatus, the conveying device (3) is a belt conveyor; the weight measuring device (4-1) selects a 0.5-level electronic belt scale, and the measuring precision reaches 0.5%; the thickness measuring device (4-2) is a high-precision thickness measuring device with a shaping device (4-2-A) as shown in figure 3, and the shaping hopper (4-2-A) of the shaping device 1 ) And two side plates (4-2-A) 2 ) The shape of the coal-conveying material is adjusted to rectangular output, and a press roll (4-2-A 3 ) Compacting the coal transported by its own weight to reduce the impact of bulk density variations on thickness measurement, thereby increasing thickness d Coal And measuring accuracy. The construction of high-accuracy weight measurement and high-accuracy thickness measurement is the basis for achieving high-accuracy coal quality parameter measurement. FIG. 2 is a preferred embodiment of the proposed coal quality parameter offline measuring apparatus, wherein the high accuracy density measuring device is selected from the group consisting of: the weight measuring device (8-1) selects an electronic balance, the measuring precision of the electronic balance can reach 1mg, for example, when the weight of the measured coal sample weighed and loaded by the vessel (7) is 50 g, the measuring precision of the electronic balance can reach one ten thousandth; the thickness measuring device (8-2) is provided with a pressing device (8-2-A) as shown in fig. 4, and the pressing device (8-2-A) compacts the test coal sample in the vessel (7) at the same pressure each time so as to reduce the influence of the stacking density of the coal sample; the displacement measuring device (8-2-B) is a grating displacement measuring device of a grating sensor, the measuring precision of the grating displacement measuring device can reach 5 micrometers (mum), the height of a tested coal sample in the vessel (7) is between 50 mm and 100mm, the measuring precision is less than one ten thousandth, and the high-precision weight measurement and the high-precision thickness measurement ensure the high accuracy of off-line measuring coal quality parameters.
FIGS. 5 and 7 show an on-line measuring apparatus for measuring coal quality parameters by using an X-ray scale for measuring the weight W of a coal sample in an outlet pipe Coal Measured volume of coal sampleIs the volume of an X-ray measuring area formed by an X-ray source (4-1-A) and an X-ray detector (4-1-B), and is->Density of measurement
FIG. 7 is a schematic diagram showing the on-line measurement of coal quality parameters of pulverized coal by installing an X-ray scale on an air-fed pulverized coal pipeline of a coal-fired power plant, and the X-ray scale measures the weight W of pulverized coal in each meter of air-fed pipeline Powder Measured pulverized coal volumeIs the X-ray measurement area moved by a volume of one meter, < >>Measured Density->
FIGS. 5 and 7 show that if the measured coal sample weight is the weight in the same volume, its volumeIs constant and its density value->The coal sample volume measuring device can be omitted.
The second problem of patent implementation is that the measurement software, the mathematical model of measurement, has been given in the specification in terms of ρ Coal ρ Coal ＝ρ A .A+ρ M .M+ρ V .V+ρ FC .F C And according to A, M, V, FC, the person skilled in the art can select different calibration curves according to the method and thought and the change condition of the measured coal quality parameters, and establish various measurement mathematical models, such as weight W in unit volume of each component of the coal quality parameters A +W M +W V +W FC And ρ Coal Calibration curves of variation, i.e. W A ＝f(ρ Coal )，W M ＝f(ρ Coal )，W V ＝f(ρ Coal )W FC ＝f(ρ Coal ) By calibration method and linear simulationThe synthesis method comprises the following steps:
W A ＝a 3 +b 3 ρ coal
W M ＝C 3 +d 3 ρ Coal
W V ＝E 3 +F 3 ρ Coal
W FC ＝G 3 +H 3 ρ Coal
In which a is 3 b 3 、C 3 d 3 、E 3 F 3 、G 3 H 3 For calibrating coefficient
In sum, at ρ Coal And (3) selecting a calibration curve as a variable, and calibrating the measurement data of the table 1 by a calibration method to obtain the measurement mathematical model of A, M, V, FC.
The coal quality parameter measuring instrument formed by the density measuring method has the technical effects of high measuring accuracy, quick measuring time and strong adaptability to coal quality and coal quality change. Can provide important basis for the control and production management of production process in the fields of coal production, processing, application and the like, and has important significance for improving the quality of coal products, reducing pollution and improving the production management level.
Claims (9)
1. An on-line measuring instrument for density type coal quality parameters or an off-line measuring instrument for coal quality parameters is characterized in that:
the coal quality parameter online measuring instrument is composed of a weight measuring device (4-1), a thickness measuring device (4-2), a conveying device (3), a sampling device (2) and a data acquisition controller (5);
weight measuring devices (4-1) which are arranged below or at both sides of the coal or coal sample conveying device (3) and are fixed on the frame and are used for measuring the weight W of the coal or coal sample conveyed by the conveying device (3) Coal ；
A thickness measuring device (4-2) which is arranged above the conveying device (3) and is used for measuring the thickness d of the coal or the coal sample conveyed by the conveying device (3) Coal Thereby obtaining the volume of the coal or the coal sample And density of
A conveying device (3) which is arranged between the weight measuring device (4-1) and the thickness measuring device (4-2) and is used for conveying coal or coal samples;
the sampling device (2) is arranged above the conveying device (3) or is arranged on the conveying device (3) and is used for continuously collecting coal samples or collecting the coal samples on a time basis and conveying the coal samples to the conveying device (3);
a data acquisition controller (5) for receiving the weight signal W of the weight measuring device (4-1) Coal Thickness signal d of thickness measuring device Coal And according to the measured density ρ Coal Calculating coal quality parameters by using a measurement mathematical model established by the value and density measurement method: ash (A), moisture (M), volatile (V), full Char (FC)
Or the coal quality parameter off-line measuring instrument is composed of a weight measuring device (8-1), a thickness measuring device (8-2), a weighing coal sample vessel (7), a sampler (9) and a data acquisition controller (10);
a weight measuring device (8-1) which is arranged on the bottom plate of the instrument frame and is used for measuring the weight W of the test coal sample in the weighing and loading test coal sample vessel (7) Coal ；
Thickness measuring device (8-2) mounted on the upper frame of the housing for measuring the weighing testThickness d of test coal sample in coal sample vessel (7) Coal Thereby obtaining the volume of the tested coal sample And
the sampler (9) is used for collecting coal samples at the measuring points;
a data acquisition controller (10) for receiving the weight signal W of the weight measuring device (8-1) Coal Thickness measuring device (8-2) thickness signal d Coal Calculating coal quality parameters according to a measured density value and a measured mathematical model established by a density type measuring method; ash (a) moisture (M), volatile (V), full Char (FC).
2. The density-type on-line measuring instrument for coal quality parameters or the off-line measuring instrument for coal quality parameters according to claim 1, wherein the coal or coal sample conveying device (3) of the on-line measuring instrument for coal quality parameters is characterized in that the conveying device is a belt conveyor, a screw conveyor, a measuring tube and screw conveyor or a wind conveyor.
3. The density coal quality parameter online measuring instrument or the coal quality parameter offline measuring instrument according to claim 1, wherein the weight measuring device (4-1) of the coal quality parameter online measuring instrument is characterized in that the weight measuring device is an electronic belt scale, or an X-ray scale, or a laser scale.
4. The on-line or off-line measuring device (4-2) for the density coal quality parameters according to claim 1, wherein the thickness measuring device is a press roll type angular position meter, a laser type sensor distance meter, an ultrasonic type sensor distance meter, a grating type sensor distance meter, or an encoder type sensor distance meter.
5. The thickness measuring device (4-2) of the on-line measuring instrument for coal quality parameters according to claim 4, further comprising a coal or coal sample shaping device (4-2-A) consisting of a shaping hopper (4-2-A) 1 ) Side board (4-2-A) 2 ) Compression roller (4-2-A) 3 ) The composition is formed.
6. The density coal quality parameter online measuring instrument or the coal quality parameter offline measuring instrument according to claim 1, wherein the weight measuring device (8-1) of the coal quality parameter offline measuring instrument is characterized in that the weight measuring device is a high-precision electronic scale, an electronic balance or a high-precision weight measuring instrument.
7. The thickness measuring device (8-2) of the density coal quality parameter online measuring instrument or the coal quality parameter offline measuring instrument is characterized by comprising a pressing device (8-2-A) and a displacement measuring device (8-2-B), wherein the pressing device (8-2-A) comprises a driver, a screw rod, a sliding block guide rail, a pressing block and a pressure sensor; the displacement measuring device (8-2-B) of the thickness measuring device (8-2) comprises a connecting rod connected with a pressing block of the spinning device and a displacement range finder.
8. The measuring mathematical model is characterized in that the mathematical model is determined according to a density measuring method, and the digital model is as follows:
A measuring ＝α 1 +b 1 .ρ Coal …(1)
M Measuring ＝c 1 +d 1 .ρ Coal …(2)
V Measuring ＝E 1 +F 1 .ρ Coal …(3)
FC Measuring ＝G 1 +H 1 .ρ Coal …(4)
Or (b)
9. The density type coal quality parameter online measuring instrument or the coal quality parameter offline measuring instrument according to claim 1 or 8, wherein the density type measuring method is characterized by comprising the following steps:
1. a, M, V, FC and measured ρ detected according to the industrial analysis method of GB/T212-2008 coal Coal Value, establish the density ρ of the coal sample Coal Relationship with coal quality parameter A, M, V, FC:
ρ coal ＝ρ A A+ρ M M+ρ V V+ρ FC FC
Determining the rho of the coal sample Coal Characterizing A, M, V, FC inter-variation relationships;
2. constructing a coal or coal sample density measuring device to realize the density rho of the coal sample Coal Is an online or offline measurement of (a);
3. establishing a measurement mathematical model according to a density measurement method:
according to ρ Coal 、ρ Coal ＝ρ Coal ＝ρ A A+ρ M M+ρ V V+ρ FC FC and A, M, V, FC detected according to GB/T212-2008 ashing method are used as standard values, and a calibration method is adopted to establish a measurement mathematical model;
4. density value ρ measured in real time according to density measuring device Coal Calculating the coal quality parameter A according to the measurement mathematical model Measuring 、M Measuring 、V Measuring 、FC Measuring And the on-line or off-line measurement of the coal quality parameters is realized.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118464705A (en) * | 2023-10-24 | 2024-08-09 | 邸生才 | A density-based coal quality parameter analysis method and analyzer based on big data |
| CN119901628A (en) * | 2025-03-31 | 2025-04-29 | 江西江投能源技术研究有限公司 | A method for testing the bulk density of coal in coal-fired power plants based on big data |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118464705A (en) * | 2023-10-24 | 2024-08-09 | 邸生才 | A density-based coal quality parameter analysis method and analyzer based on big data |
| WO2025086595A1 (en) * | 2023-10-24 | 2025-05-01 | 邸生才 | Method for analyzing density-type coal quality parameters on basis of big data, and analyzer |
| CN119901628A (en) * | 2025-03-31 | 2025-04-29 | 江西江投能源技术研究有限公司 | A method for testing the bulk density of coal in coal-fired power plants based on big data |
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