CN115704781A - Radiation type coal quality parameter on-line or off-line measuring instrument and measuring method thereof - Google Patents
Radiation type coal quality parameter on-line or off-line measuring instrument and measuring method thereof Download PDFInfo
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- 230000005855 radiation Effects 0.000 title claims abstract description 111
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- 238000005259 measurement Methods 0.000 claims abstract description 43
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- 238000004458 analytical method Methods 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 19
- 238000005303 weighing Methods 0.000 claims description 7
- 238000000691 measurement method Methods 0.000 claims description 5
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- 230000005251 gamma ray Effects 0.000 claims description 2
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Abstract
The radiation type coal quality parameter on-line or off-line measuring instrument is composed of a radiation type measuring device, a coal or coal sample conveying device, a coal sample sampling device or a coal shaping device and a data acquisition controller, and the coal quality parameter measuring method of the patent is adopted to realize the coal quality parameters: the real-time online measurement or offline rapid measurement of ash content (A), moisture content (M), total carbon (FC), volatile matter (V) and coal calorific value (Q) has the characteristics of good radiation safety, high measurement accuracy, strong adaptability to coal type change and the like. The method can be applied to coal quality parameter measurement in various fields of coal production, processing and utilization, can provide important basis for automatic control and production management in the process of coal production and processing, and has important meanings for improving the product quality of coal, improving the utilization rate of coal, reducing the consumption of coal, reducing pollutant emission and improving the production management level.
Description
Technical Field
The invention relates to coal quality parameters determined by an industrial coal analysis method, which are as follows: the method comprises the following steps of measuring ash content (A), moisture content (M), volatile component (V) of all carbon (FC) and coal calorific value (Q), and particularly relates to a method for measuring all coal quality parameters of a coal industry analysis method by adopting a radiation method and a measuring method thereof.
Background
China is the first world in the large national coal yield, and is one of main energy sources in China, coal in China is widely distributed, has multiple production areas, various coal samples and large complicated change of coal quality, brings great difficulty to production, processing and utilization of coal, online measurement and offline rapid measurement of coal quality parameters can provide necessary basis for automatic control of production process in multiple fields of coal production, processing, utilization and the like, and have important significance for improving the quality of coal products, improving the utilization rate of coal, reducing the coal consumption and reducing pollutant emission.
At present, two methods for analyzing the coal quality exist: the first is an element analysis method, which determines that the coal quality has five elements: c (carbon), H (hydrogen), O (oxygen), N (nitrogen) and S (sulfur), and the main detection method and equipment comprise the following steps: a neutron-induced prompt method and its detection equipment, a neutron activation method and its equipment, and an X-ray fluorescence method and its equipment. Due to the poor radiation safety of the method and the equipment, the equipment is complex, the cost is high, the selling price is high, and the application is less. The second is an industrial analysis method of coal, which determines that the coal quality comprises four components of ash content (A), moisture content (M) and volatile component (V) of Full Carbon (FC). The method and the equipment for detecting the coal quality parameters (A, M, FC, V) of the current industrial analytical method mainly comprise the following steps:
the method is a most main testing method at present according to GB/T212-2008 'coal industrial analysis method' for realizing off-line static measurement of coal quality parameters of ash content (A), moisture content (M), volatile components (V) and total carbon (FC), and is widely applied by confirming that the coal quality parameter values detected by the method are standard values. The method has the main defects of long detection time and incapability of timely guiding the control of the production process.
The dual-energy gamma ray coal ash content on-line detection is widely applied at home and abroad, but the application is limited due to poor radiation safety and adaptability of coal type change.
The method and the device are not widely applied due to late research and development.
At present, no matter at home or abroad, a method and a device for measuring ash content, moisture content, volatile matters, total carbon and calorific value of all coal parameters determined by a radiation type measuring method and an off-line or on-line coal industrial analysis method are seen.
The invention provides a radiation type coal quality parameter on-line or off-line measuring instrument, which can realize off-line rapid detection of all coal quality parameters of coal or a coal sample or on-line real-time detection of all coal quality parameters of the coal or the coal sample, and a measuring method thereof.
Disclosure of Invention
The invention solves the main technical problems that:
1. and constructing a radiation type coal quality parameter online measuring instrument or an offline measuring instrument.
2. A coal quality parameter measuring method is established according to an industrial analysis method of coal, a substance-to-ray absorption law and a superposition principle so as to realize off-line or on-line measurement of coal quality parameters.
A radiation type coal quality parameter on-line or off-line measuring instrument is characterized by comprising a radiation type measuring device, a coal or coal sample conveying device, a sampling device or a shaping device and a data acquisition controller, wherein the radiation type measuring device (4) comprises a radiation source (4-1), a radiation detector (4-2) and an installation frame (4-3), the radiation source and the radiation detector are respectively arranged above and below the coal or coal sample conveying device (3) or on two sides of the coal or coal sample conveying device (3) and are fixed on the frame, a radiation measuring area is formed between the radiation source and the radiation detector and is used for measuring a coal quality parameter signal U of the coal or coal sample conveyed by the conveying device (3) i And U o ，
U i -when there is coal or a coal sample, the radiation detector outputs a signal;
U o -when no coal or coal sample is present, the radiation detector outputs a signal;
the coal or coal sample conveying device (3) is arranged between the radiation source (4-1) and the radiation detector (4-2) and is used for conveying coal or coal samples to the radiation measuring area for coal quality parameter measurement;
the sampling device or the shaping device (2) is arranged above the coal or coal sample conveying device (3) or is located on the coal and coal sample conveying device (3) and is used for continuously sampling or shaping the conveyed coal at a measuring point (1) where coal quality parameters need to be measured in the production process; the data acquisition controller (5) is used for receiving signals of the acquisition device or the shaping device (2), signals of the coal or coal sample conveying device (3) and signals of the radiation detector (4-2) and calculating coal quality parameters of the coal or coal sample according to a mathematical model established by a coal quality parameter measuring method: ash (A), moisture (M), all carbon (FC) volatiles (V), and calorific value (Q)
Or the off-line measuring instrument is characterized by comprising:
the radiation type measuring device (4) comprises a radiation source (4-1), a radiation detector (4-2) and a mounting frame (4-3). The radiation source and the radiation detector are respectively arranged above and below the coal sample conveying device (3) or arranged on two sides of the coal sample conveying device (3) and fixed on the mounting frame. A measuring area is formed between the radiation source and the radiation detector and is used for measuring coal quality parameter signals U of the coal sample conveyed by the coal sample conveying device (3) i And U o ，
U i -when there is a coal sample, the radiation detector outputs a signal;
U o -when no coal sample is present, the radiation detector outputs a signal;
the coal sample conveying device (3) is arranged between the radiation source (4-1) and the radiation detector (4-2) and is used for conveying the coal sample to the radiation measurement area for coal quality parameter measurement;
the sampling device (2) comprises a sampler (2-1) and a coal-loading sample vessel (2-4), wherein the sampler (2-1) is used for randomly sampling coal at each measuring point, and the coal-loading sample vessel (2-4) is used for weighing coal samples and conveying the vessels to the coal sample conveying device (3) for measurement.
And the data acquisition controller (5) is used for receiving the signals of the acquisition device (2), the signals of the coal sample conveying device (3) and the signals of the radiation detector (4-2), and calculating ash content (A), moisture content (M), total carbon (FC) volatile components (V) and heat productivity (Q) of the coal sample according to a mathematical model established by a coal quality parameter measurement method.
The structure of the radiation type coal quality parameter on-line measuring instrument is shown in figure 1;
the structure of the radiation type coal quality parameter off-line measuring instrument is shown in figure 2;
the coal or coal sample conveying device of the coal quality parameter on-line measuring instrument is characterized by a belt conveyor, or a screw conveyor, or a measuring pipe and screw conveyor, or a belt conveyor for conveying coal on a user production line, or a wind conveyor.
The coal sample conveying device of the coal quality parameter off-line measuring instrument is characterized by a linear reciprocating conveying device, or a disc rotary conveying device, or a reciprocating belt conveyor.
The radiation type measuring device of the coal quality parameter on-line or off-line measuring instrument is characterized in that a radiation source is an americium-241 source or a low-energy X-ray source with high voltage less than 50 kV; the radiation detector is one or more NaI scintillation counters, or one or more ionization chambers, or one or more counters, or one or more plastic scintillation counters, or a plurality of semiconductor detectors.
FIG. 3 is a schematic diagram of an online measurement instrument for online measurement of continuous sampling radiation type coal quality parameters;
FIG. 4 is a schematic diagram of an off-line coal quality parameter measurement instrument for random sampling and rapid measurement;
FIG. 5 is a schematic diagram of the coal quality parameter on-line measuring instrument installed on a user on-site production line.
The patent also discloses a method for measuring coal quality parameters, which is established according to an industrial analysis method of coal, a substance-to-ray absorption principle and a superposition principle:
1. the industrial analysis method of coal determines that the coal is composed of four components of ash content (A), moisture content (M) and total carbon (FC) volatile component (V), and the coal means that each component in the coal has weight W A 、W M 、W FC 、W V Weight W of coal Coal (coal) The mass percentage of the ratio is as follows:
and a (%) + M (%) + FC (%) + V (%) =100%
W Coal (coal) ＝W A +W M +W FC +W V
The industrial analysis method of GB/T212-2008 coal provides off-line measurement method and equipment, off-line measurement of A, M and V, and calculation of FC = [1- (A + M + V)]W is the ratio of the weight of the coal components to the specific gravity (density) Coal (coal) Functional relation of = f (A, M, FC, V), and the method adopts a radiation method to measure W in the same volume or unit body Coal (coal) A, M, FC, and V were measured.
2. According to the principle of absorption of radiation by substances, the method comprises the following steps:
wherein W Substance(s) Weight of the measured substance
K-calibration factor
U i Output signal of radiation detector in the presence of matter
U o Output signal of the material-free radiation detector
For substances formed by a plurality of components, the absorption conforms to the superposition principle, for example, the ray absorption of coal is equal to the sum of the rays absorbed by various components respectively, namely:
W coal testing ＝W A side survey +W M side +W FC test +W V side
V Side survey ＝[1-(A Side survey +N Side survey +FC Side survey )]
The coal quality parameter on-line measuring method established according to an industrial analysis method, a substance radiation absorption law and a superposition principle is characterized by comprising the following steps of:
1) The on-line measuring method comprises the following steps:
Step 1.1, a sampler continuously samples coal conveyed at a measuring point (1) or continuously samples coal on a time base;
step 1.2, a sampler randomly samples a coal sample measured by a radiation type measuring device;
Step 2.1, crushing the coal sample collected in the step 1.1 by using a crusher, and preparing the coal sample collected in the step 1.2 into a test coal sample according to the measurement requirement of the industrial analysis method of GB/T-2008 coal;
step 3.1, detecting a coal sample weight signal in real time by the radiation type measuring device:
suppose the weight of a coal sample measured over a certain time interval t at a certain moment is W Coal 1
Where n-the number of measurements at time t,
Δ t-acquisition signal time;
step 3.2, collecting the coal sample to be measured within T time while measuring by the radiation type measuring device, and measuring A according to the requirement of the industrial analysis method of GB/T212-2008 coal 1 、M 1 、V 1 And calculating FC 1 ＝[1-(A 1 +M 1 +V 1 )](ii) a Measuring the calorific value Q of the coal sample according to the requirement of the calorific value measuring method of GB/T213-2008 coal 1 ；
Step 3.3, obtaining the coal sample weight W measured at certain time intervals according to the step 3.1 Coal 1 And 3.2 coal sample A measured in step 1 、M 1 、V 1 、FC 1 、Q 1 And (3) calculating:
W A1 ＝W coal 1 *A 1 ，W M1 ＝W Coal 1 *M 1 ，W FC1 ＝W Coal 1 *FC 1 ，
Step 3.4 repeat step 3.1, step 3.2, step 3.3n times, get n groups of data as table 1;
TABLE 1
Step 3.5, linear fitting
Performing linear fitting on the data of the A column and the F column to obtain W Ai ＝α A +b A *W Coal i ————(1)
Performing linear fitting on the data of the A column and the G column to obtain W Mi ＝α M +b M *W Coal i ————(2)
Performing linear fitting on the data of the A column and the H column to obtain W FCi ＝α FC +b FC *W Coal i ————(3)
Linearly fitting the data of the I column and the E column to obtain Q i ＝α Q +b Q *FC i ——————(4)
Note: the measurement method can also be used for directly fitting columns B and A, columns C and A and columns E and A, and can also be used for fitting one item, two items or more items.
Step 4.1, the radiation type measuring device measures the weight W of the coal sample in real time Coal i ；
Step 4.2, according to W Coal i And formula (1) calculates W Ai ，
According to W Coal i And W Ai Calculate A Measure i ，
According to W Coal i And formula (2) calculates W Mi ，
According to W Coal i And W Mi Calculate out
According to W Coal i And formula (3) calculates W FCi ，
According to W Coal i And W FCi Calculate out
According to A Measure i 、M Measure i 、FC Measure i Calculate out
V Side i ＝[1-(A Measure i +M Measure i +FC Measure i )]
According to FC Side i And Q is calculated by formula (4) Side i ＝α Q +b Q *FC Measure i ；
2) The off-line coal quality parameter measuring method established according to the industrial analysis ray absorption theorem of coal is characterized by comprising the following steps of:
The sampler randomly samples the coal at the measuring point;
Preparing an acquired coal sample into a test coal sample according to the requirement of an industrial analysis method of GB/T212-2008 coal;
step 3.1, loading the test coal sample into a coal sample vessel;
step 3.2, placing the vessel weighed with the test coal sample on a coal sample conveying device, conveying the vessel to a radiation measurement area by the coal sample conveying device for measurement, and obtaining:
n-number of measurements within measurement time t
t-time of measurement
At-time of signal acquisition
Step 3.3, measuring A of the test coal sample weighed and loaded by the vessel according to the GB/T212-2008 regulation requirement 1 、M 1 、 V 1 Calculate FC 1 ＝[1-(A 1 +M 1 +V 1 )](ii) a Measuring the calorific value Q1 of the test coal sample according to the requirement of a calorific value measuring method of GB/T213-2008 coal;
step 3.4, repeating step 3.1, step 3.2 and step 3.3n times to obtain n groups of data as shown in table 2;
TABLE 2
Step 3.5, linear fitting
Performing linear fitting on the data of the A column and the F column to obtain W Ai ＝α A +b A *W Coal i ————(5)
Performing linear fitting on the data of the A column and the G column to obtain W Mi ＝α M +b M *W Coal i ————(6)
Performing linear fitting on the data of the A column and the H column to obtain W FCi ＝α FC +b FC *W Coal i ————(7)
Linearly fitting the data of the I column and the E column to obtain Q i ＝α Q +b Q *FC i ——————(8)
Note: the measurement method can also be used for directly fitting columns B and A, columns C and A and columns E and A, and can also be used for fitting one item, two items or more items.
Step 4.1, the radiation measuring device measures the weight W of the coal sample in the weighing test coal sample vessel Coal i ；
Step 4.2, according to W Coal i And calculating the ash weight W by the formula (5) Ai And an
According to W Coal i And the formula (6) calculates the water content W Mi And an
According to W Coal i And the formula (7) calculates the weight W of the total carbon FCi And, and
according to A Measure i 、M Measure i 、FC Measure i And calculating V Measure i
V Measure i ＝[1-(A Measure i +M Side i +FC Side i )]
According to FC Measure i And formula (8) calculating Q Measure i
Q Measure i ＝α Q +b Q FC Measure i 。
Note: the steps can be disassembled or assembled, and the number of the steps can not be taken as the limitation of patents.
Drawings
FIG. 1 is a schematic diagram of a radiant coal quality parameter on-line measuring instrument
1-measuring point (coal sampling point)
2-coal sample collecting or shaping device
2-1 collector
2-2 crusher
2-3 material pipes or hoppers
3-coal or coal sample conveying device
4-radiation type measuring device
4-1 radiation source
4-2 radiation detector
4-3 mounting frame
5-data acquisition controller
6-coal sample
FIG. 2 is a schematic view of a radiation type coal quality parameter off-line measuring instrument
1-measuring point (coal sampling point)
2-sampling device
2-1 sampler
2-4 weigh coal-charging sample vessel
3-coal sample conveying device
4-radiation type measuring device
4-1 radiation source
4-2 radiation controller
4-3 mounting frame
FIG. 3 is a schematic diagram of a continuous sampling radiation type coal quality parameter on-line measuring instrument
1-measuring point (sampling point)
2-coal sample collecting device
2-1 screw conveyer namely sampler
2-2 crusher
3-coal or coal sample conveying device
3-1 measuring tube
3-2 screw conveyer
4-radiation type measuring device
4-1 radiation source
4-2 radiation detector
5-data acquisition controller
FIG. 4 is a schematic diagram of a random sampling radiation type coal quality parameter off-line measuring instrument
FIG. 4 (a) front view, FIG. 4 (b) plan view
1-measuring point (sampling point)
2-coal sample collecting device
2-1 sampler
2-2 weighing coal-charging sample vessel
3-linear reciprocating conveying device
15 moving plate rail
16 electric push rod
17 moving plate
18 support
FIG. 5 is a schematic view of an on-line coal quality parameter measuring instrument installed on a production line
10-conveyer
11-shaping hopper
12-angular displacement thickness measuring instrument
13-Belt conveyer on production line
Detailed Description
The concrete implementation of the patent is further explained by combining the attached drawings, and the coal quality parameter online measuring instrument has two schemes, namely, a sampling device carries out continuous sampling or time-based sampling on the conveyed coal in production, and a radiation type measuring device carries out continuous measurement; secondly, the produced and conveyed coal passes through a shaping device, and a radiation measuring device directly measures the conveyed coal.
FIG. 1 is a schematic diagram showing the constitution of an on-line coal quality parameter measuring instrument using a sampling device (2) for time-based sampling;
FIG. 5 is a schematic diagram showing the configuration of a coal quality parameter on-line measuring instrument for directly measuring the coal quality parameter after shaping the conveyed coal by using the shaping device (2);
the sampling device for on-line measurement comprises a sampler (2-1) and a crusher (2-2) material pipe or hopper (2-3), wherein the sampler applies more heavy hammer cutters in coal production to transversely cut coal on a conveyer belt within the same time to continuously obtain a coal sample, the coal sample is crushed by the crusher and then is sent to a coal sample conveying device for continuous measurement, the sampler can also take the coal sample at a blanking position, and the sampler at the moment can select a cutting groove type sampler, a cutting bucket type sampler and a rocker arm type sampler;
fig. 3 also shows a schematic diagram of the coal quality parameter online measuring instrument which adopts a screw conveyor (as a sampling device) to perform continuous sampling and continuous measurement.
The off-line measurement of the coal quality parameter off-line measuring instrument is that a sampler (2-1) randomly takes a coal sample of static coal or flowing coal, the sample is prepared into a test coal sample, the test coal sample is loaded into a coal sample weighing vessel and placed on a coal sample conveying device (3) for measurement, a schematic diagram of the coal quality parameter off-line measuring instrument is shown in figure 2, and the sampler for random sampling is the most widely used mechanical screw type sampler at present, and can carry out random sampling rapid measurement on train, automobile, ship, coal yard coal stacking, coal entering a factory and the like.
The coal or coal sample conveying device (3) of the coal quality parameter online or offline measuring instrument can select various conveying devices or conveyors, and the following are recommended and selected in the patent: the round-trip linear conveying device or the disc rotary conveying device is selected for off-line measurement, and a schematic diagram of the coal quality parameter off-line measuring instrument adopting the round-trip linear conveying device is shown in fig. 4. The on-line measurement adopts a belt conveyor or a spiral conveyor or a measuring pipe and the spiral conveyor or directly adopts the belt conveyor in the production process.
Fig. 3 shows a schematic diagram of a measuring tube + screw conveyor, constituting a conveying device, on-line measuring instrument.
Fig. 5 shows a schematic diagram of an on-line measuring instrument as a conveying device of a belt conveyor in the production of a user.
A radiation source (4-1) and a radiation detector (4-2) of a radiation measuring device of the on-line or off-line measuring instrument for the coal quality parameters recommend that a low-energy X-ray source and an X-ray detector select one or more scintillation counters or semiconductor array detectors.
Fig. 3, 4 and 5 show the preferred embodiment of this patent. Naturally, a person skilled in the art may implement various embodiments or modifications according to the patent idea and the function of each device in the technical solution, and also fall into the protection scope of the patent.
The technical effects are as follows: the coal quality parameters are measured on line or off line, ash content, moisture content, total carbon, volatile matters and heat productivity are comprehensively and quickly detected, important basis can be provided for various fields such as coal production, processing, utilization and production management, and the method has important significance for improving product quality, improving coal utilization rate, improving production management level, improving thermal power generation efficiency, reducing emission and building intelligent power plants.
Claims (7)
1. A radiation type coal quality parameter on-line or off-line measuring instrument is characterized by comprising:
the radiation type measuring device (4) comprises a radiation source (4-1), a radiation detector (4-2) and a mounting frame (4-3);
a radiation source and a radiation detector are respectively arranged above and below the coal or coal sample conveying device (3) or on two sides of the coal or coal sample conveying device (3) and are fixed on the frame, a radiation measuring area is formed between the radiation source and the radiation detector and is used for measuring a coal parameter signal U of the coal or coal sample conveyed by the conveying device (3) i And U o ，
U i -when there is coal or a coal sample, the radiation detector outputs a signal;
U o -when no coal or coal sample is present, the radiation detector outputs a signal;
the coal or coal sample conveying device (3) is arranged between the radiation source (4-1) and the radiation detector (4-2) and is used for conveying coal or coal samples to the radiation measuring area for coal quality parameter measurement;
the sampling device or the shaping device (2) is arranged above the coal or coal sample conveying device (3) or is positioned on the coal and coal sample conveying device (3) and is used for continuously sampling the conveyed coal or shaping the conveyed coal at a measuring point (1) needing to measure coal quality parameters in the production process; the data acquisition controller (5) is used for receiving signals of the acquisition device or the shaping device (2), signals of the coal or coal sample conveying device (3) and signals of the radiation detector (4-2) and calculating coal quality parameters of the coal or coal sample according to a mathematical model established by a coal quality parameter measuring method: ash (a), moisture (M), all carbon (FC) volatiles (V), and calorific value (Q);
or the off-line measuring instrument is characterized by comprising:
the radiation type measuring device (4) comprises a radiation source (4-1), a radiation detector (4-2) and an installation frame (4-3), wherein the radiation source and the radiation detector are respectively arranged above and below the coal sample conveying device (3) or arranged on two sides of the coal sample conveying device (3) and fixed on the installation frame. A measuring area is formed between the radiation source and the radiation detector and is used for measuring a coal sample conveying device (3) Coal quality parameter signal U for conveying coal sample i And U o ；
U i -when there is a coal sample, the radiation detector outputs a signal;
U o -when no coal sample is present, the radiation detector outputs a signal;
the coal sample conveying device (3) is arranged between the radiation source (4-1) and the radiation detector (4-2) and is used for conveying the coal sample to the radiation measurement area for coal quality parameter measurement;
the sampling device (2) comprises a sampler (2-1) and a coal-loading sample vessel (2-4), the sampler (2-1) is used for randomly sampling coal at a measuring point, the coal-loading sample vessel (2-4) is used for weighing a coal-loading sample, and the vessel is conveyed to the coal sample conveying device (3) for measurement;
a data acquisition controller (5) for receiving the signal of the acquisition device (2),
Signals of the coal sample conveying device (3) and signals of the radiation detector (4-2) are calculated according to a mathematical model established by a coal quality parameter measuring method to calculate ash content (A), moisture content (M), total carbon (FC) volatile components (V) and calorific value (Q) of the coal sample.
2. According to claim 1, the radiant coal quality parameter online or offline measuring instrument, the radiation source and the radiation detector are characterized in that the radiation source is an americium-241 gamma ray source or a low-energy X-ray source with a high voltage of less than 50kV, and the radiation detector is one or more NaI scintillation counters, one or more ionization chambers, one or more counters, one or more plastic scintillation counters or a plurality of semiconductor detectors.
3. The radiant coal quality parameter on-line or off-line measuring instrument as claimed in claim 1, wherein the coal or coal sample conveying device of the on-line measuring instrument is characterized in that the conveying device is a belt conveyor, a spiral conveyor, a measuring tube and a spiral conveyor, a belt conveyor on a production line or a wind conveyor.
4. The device as claimed in claim 1, wherein the radiant coal quality parameter on-line or off-line measuring instrument is a coal sample conveying device of the off-line measuring instrument, and the conveying device is a linear reciprocating conveying device, a disc rotary conveying device or a reciprocating belt conveyor.
5. The radiation type coal quality parameter on-line or off-line measuring instrument as claimed in claim 1, wherein the sampling device or the shaping device of the on-line measuring instrument is characterized in that the sampling device comprises a sampler, a crusher, a material pipe or a hopper, or the coal shaping device comprises a shaping hopper and a compaction thickness measuring device.
6. The radiation type coal quality parameter on-line or off-line measuring instrument as claimed in claim 1, wherein the collecting device of said off-line measuring instrument is characterized by that said collecting device includes sampler and coal sample weighing container.
7. According to claim 1, the radiant coal quality parameter on-line or off-line measuring instrument, the coal quality parameter measuring method is characterized by comprising the following steps:
1) The on-line measuring method comprises the following steps:
step 1, sampling
Step 1.1, a sampler continuously samples coal conveyed at a measuring point (1) or continuously samples coal in a time base;
step 1.2, a sampler randomly samples the coal sample measured by the radiation type measuring device;
step 2, preparing a sample
Step 2.1, crushing the coal sample collected in the step 1.1 by using a crusher, and preparing a test coal sample from the coal sample collected in the step 1.2 according to the measurement requirement of the GB/T-2008 coal industrial analysis method;
step 3, calibrating, namely calibrating by taking A, M and V measured by an analysis method of GB/T212-2008 coal as standard values;
step 3.1, detecting a coal sample weight signal in real time by the radiation type measuring device:
suppose the weight of a coal sample measured over a certain time interval t at a certain moment is W Coal 1
Where n-the number of measurements at time t,
Δ t-acquisition signal time;
step 3.2, collecting the coal sample to be measured in T time while measuring by the radiation type measuring device, and measuring A according to the requirement of the industrial analysis method of GB/T212-2008 coal 1 、M 1 、V 1 And calculating FC 1 ＝[1-(A 1 +M 1 +V 1 )](ii) a Measuring the calorific value Q of the coal sample according to the requirement of the calorific value measuring method of GB/T213-2008 coal 1 ；
Step 3.3, obtaining the coal sample weight W measured at certain time intervals according to the step 3.1 Coal 1 And step 3.2 coal sample A 1 、M 1 、V 1 、FC 1 、Q 1 And (3) calculating:
W A1 ＝W coal 1 *A 1 ，W M1 ＝W Coal 1 *M 1 ，W FC1 ＝W Coal 1 *FC 1 ，
Step 3.4, repeating step 3.1, step 3.2 and step 3.3n times to obtain n groups of data as shown in table 1;
TABLE 1
Step 3.5, linear fitting
Performing linear fitting on the data of the A column and the F column to obtain W Ai ＝α A +b A *W Coal i ————(1)
Performing linear fitting on the data of the A column and the G column to obtain W Mi ＝α M +b M *W Coal i ————(2)
Performing linear fitting on the data of the A column and the H column to obtain W FCi ＝α FC +b FC *W Coal i ————(3)
Linearly fitting the data of the I column and the E column to obtain Q i ＝α Q +b Q *FC i ——————(4)
Note: or directly fitting the columns B and A, the columns C and A and the columns E and A;
step 4, measuring
Step 4.1, the radiation type measuring device measures the weight W of the coal sample in real time Coal i ；
Step 4.2, according to W Coal i And formula (1) calculates W Ai ，
According to W Coal i And W Ai Calculate A Side i ，
According to W Coal i And formula (2) calculates W Mi ，
According to W Coal i And W Mi Calculate out
According to W Coal i And formula (3) calculates W FCi ，
According to W Coal i And W FCi Calculate out
According to A Measure i 、M Measure i 、FC Measure i Calculate out
V Measure i ＝[1-(A Measure i +M Measure i +FC Side i )]
According to FC Side i And Q is calculated by formula (4) Measure i ＝α Q +b Q *FC Measure i ；
2) The off-line measurement method for the coal quality parameters is characterized by comprising the following steps:
step 1, sampling
The sampler randomly samples the coal at the measuring point;
step 2, preparing a sample
Preparing an acquired coal sample into a test coal sample according to the requirement of an industrial analysis method of GB/T212-2008 coal;
step 3, calibrating, namely calibrating by taking A, M and V measured by an industrial analysis method of GB/T212-2008 coal as standard values;
step 3.1, loading the test coal sample into a coal sample vessel;
step 3.2, placing the vessel weighed with the test coal sample on a coal sample conveying device, conveying the vessel to a radiation measurement area by the coal sample conveying device, and measuring to obtain:
n-number of measurements within measurement time t
t-time of measurement
Δ t-time of signal acquisition
Step 3.3, measuring A of the test coal sample weighed and loaded by the vessel according to the GB/T212-2008 regulation requirement 1 、M 1 、V 1 Calculate FC 1 ＝[1-(A 1 +M 1 +V 1 )](ii) a Measuring the calorific value Q of the test coal sample according to the requirement of the calorific value measuring method of GB/T213-2008 coal 1 ；
Step 3.4, repeating step 3.1, step 3.2 and step 3.3n times to obtain n groups of data as shown in table 2;
TABLE 2
Step 3.5, linear fitting
Performing linear fitting on the data of the A column and the F column to obtain W Ai ＝α A +b A *W Coal i ————(5)
Performing linear fitting on the data of the A column and the G column to obtain W Mi ＝α M +b M *W Coal i ————(6)
Performing linear fitting on the data of the A column and the H column to obtain W FCi ＝α FC +b FC *W Coal i ————(7)
Linearly fitting the data of the I column and the E column to obtain Q i ＝α Q +b Q *FC i ——————(8)
Note: or directly fitting the columns B and A, the columns C and A and the columns E and A;
step 4, measuring
Step 4.1, the radiation measuring device measures the weight W of the coal sample in the weighing test coal sample vessel Coal i ；
Step 4.2, according to W Coal i And calculating the ash weight W by the formula (5) Ai And an
According to W Coal i And the formula (6) calculates the water content W Mi And, and
according to W Coal i And calculating the weight W of the total carbon by the formula (7) FCi And, and
according to A Side i 、M Measure i 、FC Side i And calculating V Measure i
V Measure i ＝[1-(A Measure i +M Measure i +FC Measure i )]
According to FC Measure i And formula (8) calculating Q Measure i
Q Measure i ＝α Q +b Q FC Measure i 。
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