CN111707691A - Controllable neutron source mobile type coal component rapid detection device - Google Patents
Controllable neutron source mobile type coal component rapid detection device Download PDFInfo
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- CN111707691A CN111707691A CN202010549300.0A CN202010549300A CN111707691A CN 111707691 A CN111707691 A CN 111707691A CN 202010549300 A CN202010549300 A CN 202010549300A CN 111707691 A CN111707691 A CN 111707691A
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 239000002864 coal component Substances 0.000 title abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 97
- 238000001228 spectrum Methods 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 23
- 230000005251 gamma ray Effects 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 7
- 229920001903 high density polyethylene Polymers 0.000 claims description 6
- 239000004700 high-density polyethylene Substances 0.000 claims description 6
- 238000007781 pre-processing Methods 0.000 claims description 4
- 229910052580 B4C Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 229910052722 tritium Inorganic materials 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 10
- 238000003947 neutron activation analysis Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- -1 calorific value Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- 230000002285 radioactive effect Effects 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
- G01N23/22—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 measuring secondary emission from the material
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Abstract
The invention discloses a mobile coal component rapid detection device with a controllable neutron source, which comprises a neutron source component, a detector component, a signal processing component, a communication component and a mobile component. The neutron source assembly comprises a neutron tube, a neutron source module, a neutron tube power supply module and a neutron tube control module; the detector assembly comprises a gamma ray detector and a detector protection module; the signal processing assembly comprises a gamma energy spectrum generating module, a coal element analyzing module and a coal industry index analyzing module; the communication component is internally provided with a communication module and supports internet access communication and wireless communication; remove the subassembly including swastika scraper, scraper driving motor and external drive connector. Each part of the device is integrated in the cylindrical shell, so that the coal composition of the vehicle can be quickly detected before unloading, the measuring point and the measuring depth can be changed, and the device has the characteristics of movable equipment, switchable neutron source, high measuring precision and the like.
Description
Technical Field
The invention relates to a mobile coal component rapid detection device with a controllable neutron source, belonging to the technical field of automatic detection and nuclear detection. In particular to a device for quickly detecting the coal quality component of coal transported by automobiles and trains.
Background
The coal component fast detecting technology mainly includes double-energy gamma analysis technology, X-fluorescence coal element analysis technology, laser induced spectrum technology, prompt gamma ray neutron activation analysis technology and the like. The dual-energy gamma analysis technology cannot detect the element components of the raw coal, only can detect the content of the total ash content of the raw coal, and the detection precision is greatly influenced by the change of the coal bulk density and the raw coal components. The effective element measurement range of the X fluorescence coal element analysis technology is 11 th element (Na) to 92 th element (U), but the X fluorescence coal element analysis technology can only detect the components on the surface of coal, is greatly influenced by the granularity and the surface shape of the coal, is not suitable for detecting the block raw coal, and is more applied to the laboratory environment for analyzing the coal powder sample. The laser induced spectrum technology needs sampling and sample preparation for detecting coal, and a light path is easy to be polluted, so that the coal cannot be directly detected. Prompt gamma ray neutron Activation Analysis (PGNAA) is widely applied to on-line detection of ore and coal element components, and is a feasible technology capable of quickly detecting raw coal on line at present.
In the field of prompt gamma-ray neutron activation analysis, most of domestic and foreign technical products are cross-belt type coal component online detection equipment, or directly detect raw coal on a main conveying belt, or detect raw coal on an auxiliary belt after mechanical sampling. For a large amount of coal transported into a factory by an automobile or a train, a mechanical sampler still samples and tests in a laboratory, so that coal quality data cannot be obtained in time, and whether the coal entering the factory meets the standard of entering the factory cannot be judged in time.
The existing cross-belt type coal component on-line detection equipment cannot directly detect the coal components in the carriages of the automobile and the train, so that the requirement of a client on quickly and accurately detecting the coal quality entering the factory cannot be met.
The on-line detection equipment for the coal components based on the isotope radioactive source cannot switch off the neutron source in non-working time, so that the equipment is inconvenient to use, maintain and manage, and the enthusiasm of users is restricted.
The movable type coal component rapid detection device of the controllable neutron source can carry out movable detection on automobile and train coal, and can judge the neutron source when not working, so that the equipment is very convenient to use, maintain, move and manage.
Disclosure of Invention
The technical problem is as follows:
the technical problem to be solved by the invention is to apply a controllable neutron source mobile device to quickly detect the coal quality components aiming at the coal entering a factory transported by an automobile or a train, namely, before the coal is unloaded, sampling is not needed, and the coal element components and the industrial component indexes are quickly detected so as to help a user to timely judge whether the coal quality meets the technical requirements.
The technical scheme is as follows:
in order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention discloses a mobile coal component rapid detection device with a controllable neutron source, which comprises a neutron source component, a detector component, a signal processing component, a communication component and a mobile component, wherein the neutron source component is arranged on the neutron source component; the neutron source assembly, the detector assembly, the signal processing assembly, the communication assembly and the moving assembly are integrally packaged in a cylindrical shell;
the neutron source assembly comprises a neutron tube, a neutron source module, a neutron tube power supply module and a neutron tube control module, the neutron tube can be switched off when the neutron source assembly does not work, neutrons are not generated, and neutrons with stable yield can be generated according to requirements when the neutron source assembly works; the detector assembly comprises a gamma ray detector and a detector protection module, and is used for receiving characteristic gamma rays and generating electric pulse signals corresponding to the characteristic gamma rays; the neutron source assembly and the detector assembly are both positioned above the measuring end face, and are used for performing scattering type measurement on coal components below the measuring end face;
the signal processing assembly comprises a gamma energy spectrum generating module, a coal element analyzing module and a coal industry index analyzing module; the gamma energy spectrum generation module is used for filtering, amplifying and digitally processing a gamma pulse signal from the gamma ray detector and generating a gamma energy spectrum; the coal element analysis module completes the identification of a gamma energy spectrum and analyzes the content of each element of the coal; the coal industry index analysis module analyzes the coal calorific value, ash content, moisture content, sulfur content and other industry indexes based on the coal element content;
the communication module is internally provided with a communication module, supports internet access communication and wireless communication, can wirelessly access the device by utilizing a computer and a mobile phone client program, and can inquire the working state parameters of the device, the measured gamma energy spectrum, the coal element components, the coal industrial component indexes and other data.
The mobile assembly is connected with external driving equipment through an external driving connecting port; the external driving equipment can integrally move up and down through the rotation of the screw rod, non-contact measurement can be carried out above coal, and the scraper driving motor of the device can drive the front swastika scraper to advance, so that the measuring end face can penetrate into the coal to be measured; the external driving equipment can also drive the device to integrally move left and right and back and forth so as to change each measuring point;
in the invention, preferably, the neutron tube is a deuterium-tritium type neutron tube, the neutron energy is 14MeV, and the neutron yield is 1 × 108n/s；
In the invention, preferably, the neutron source module comprises a bismuth block, a graphite block, a neutron moderator made of high-density polyethylene plate material and a neutron protector;
in the invention, preferably, the gamma ray detector comprises a NaI (Tl) crystal, a photomultiplier and a preprocessing circuit;
in the present invention, preferably, the nai (tl) crystal has a 4 × 4 × 16 ″ size of a cube.
In the present invention, preferably, the detector protection module includes a neutron protection structure made of boron carbide and high-density polyethylene plates.
Has the advantages that:
compared with the prior art, the invention has the following beneficial effects:
the device can be installed in coal enterprises such as power plants, cement plants, chemical plants and the like which transport coal into plants by using automobiles or trains, and forms a cantilever type or door type automatic detection system for coal quality entering the plants together with corresponding driving equipment. The driving device can drive the device to move back and forth and left and right above the vehicle so as to change the measuring point; the device can also drive the front swastika scraper to advance by combining the rotation of the screw rod with the scraper driving motor of the device, so that the device can move up and down to change the measurement depth, and the measurement result can more accurately reflect the quality of coal carried by a vehicle.
The electrically controllable neutron tube is adopted to replace an isotope neutron source, not only is a thermal neutron capture reaction utilized in detection, but also a fast neutron non-elastic scattering reaction is utilized, the monochromaticity of an energy spectrum is better, the measurement precision of two main elements C, O in coal is higher, the neutron source can be turned off when the neutron source does not work, and the use and the management are convenient.
The client can use computer and mobile phone client program to access the device wirelessly, and can inquire the working state parameters of the device and the measurement data of coal components. The invention can provide powerful help for clients to master the quality of coal entering a plant in time and provide scientific basis for reasonable coal stockpiling and use.
Drawings
Fig. 1 is a block diagram of the overall structure of the present invention.
FIG. 2 is a block diagram of the structure of the gate-type automatic coal composition measuring system integrated with an external drive according to the present invention.
FIG. 3 is a table of elemental analysis properties of coal.
FIG. 4 is a table of coal industry analytical performance.
List of reference numerals:
0-controllable neutron source mobile type coal component rapid detection device, 1-neutron tube, 2-neutron source module, 3-neutron tube power supply module, 4-neutron tube control module, 5-gamma ray detector, 6-detector protection module, 7-gamma energy spectrum generation module, 8-coal element analysis module, 9-coal industry index analysis module, 10-communication module, 11-inverse-shaped scraper, 12-inverse-shaped driving motor, 13-external driving connecting port, 14-measuring end face, 15-wiring port, 16-cylindrical shell, 17-coal, 18-external driving device, 19-lead screw, 20-mobile beam, 21-supporting stand, 22-first motor, 23-second motor, 24-a third motor.
Detailed Description
The present invention is further illustrated by the following figures and examples, which include, but are not limited to, the following examples.
As shown in FIG. 1, the neutron source module, the detector module, the signal processing module, the communication module and the like of the mobile coal composition rapid detection device with the controllable neutron source are integrated and encapsulated in a cylindrical shell 16.
In order to realize mobility, the neutron tube 1 and the gamma ray detector 5 are both positioned above the measuring end face 14, coal below the measuring end face 14 is measured in a scattering mode, neutrons generated by the neutron tube 1 irradiate the coal below in a fan-shaped distribution, and the irradiated coal emits characteristic gamma rays through a thermal neutron capture reaction and is received by the gamma ray detector 5. The scattering type measuring mode overcomes the inherent defect that the transmission type measuring mode is difficult to move.
In order to realize mobility, the signal processing assembly and the communication assembly, the neutron source assembly and the detector assembly are integrally packaged in the same shell 16; the signal processing assembly comprises a gamma energy spectrum generating module 7, a coal element analyzing module 8 and a coal industry index analyzing module 9; the communication component is internally provided with a communication module 10 and supports wireless communication; therefore, the device of the invention only needs one 220VAC power line for external electrical connection and is accessed through the wiring port 15; the client can wirelessly access the device through a computer and a mobile phone client program to obtain the working state parameters of the device and inquire the gamma energy spectrum, the coal element components and the coal industrial components.
Further, the neutron source assembly comprises a neutron tube, a neutron source module, a neutron tube power supply module and a neutron tube control module, and further, the neutron tube is a deuterium-tritium type neutron tube, the neutron energy is 14MeV, and the neutron yield is 1 × 108n/s; the neutron source module 2 comprises a neutron moderator and a neutron protective body which are made of bismuth blocks, lead blocks, graphite blocks and high-density polyethylene plate materials, neutrons emitted by the neutron source are sufficiently moderated into thermal neutrons through the neutron moderator in the measuring direction to irradiate the coal 17 to be measured, and the neutrons are not irradiated in the measuring directionCorresponding neutron protection is carried out through the neutron protection body in the measuring direction.
Further, the detector assembly comprises a gamma ray detector 5 and a detector protection module 6; furthermore, the gamma ray detector 5 comprises a NaI (Tl) crystal, a photomultiplier and a preprocessing circuit, wherein the NaI (Tl) crystal is a cube with the specification of 4 × 4 × 16 ″, the diameter of an optical window of the photomultiplier is 90mm (3.5 "), and the preprocessing circuit comprises a photomultiplier voltage division power supply circuit and a signal pulse preamplifier circuit; the detector protection module 6 comprises a neutron protection structure composed of boron carbide and high density polyethylene plates to prevent neutron damage of nai (tl) crystals.
Furthermore, the gamma energy spectrum generation module 7 is a nuclear electronic circuit based on a digital signal processing DSP chip, is connected to the gamma ray detector, receives signals from the gamma ray detector, performs amplification, filtering and digitization processing, generates a composite gamma energy spectrum signal, and transmits the composite gamma energy spectrum signal to the coal element analysis module 8.
Further, the coal element analysis module 8 receives the digitized gamma spectrum signal from the gamma spectrum analyzer 6, and obtains the content of each constituent element in the coal, such as C, H, N, S, Si, Al, Ca, Fe, Ti, Na, K, Mg, Cl, after performing energy spectrum correction, peak searching and spectrum resolving operations.
Further, the coal industry analysis module 9 analyzes the industrial component indexes of the coal, such as calorific value, ash content, volatile matter, total moisture, ash content, ash melting point, and the like, on line on the basis of obtaining the coal element content data in real time.
After the device is connected with external driving equipment, application systems such as a gate type automatic coal component measuring system, a cantilever type automatic coal component measuring system, a coal component automatic measuring flow vehicle and the like can be formed, and the gate type automatic coal component measuring system shown in fig. 2 is taken as an example for explanation.
As shown in fig. 2, the device of the present invention is fixedly connected with an external driving device 18 through a driving connection port 13. The external driving device 18 has a first motor 22 and a second motor 23 inside to drive the apparatus of the present invention to move up and down and left and right, respectively.
The first motor 22 drives the screw rod 19 to rotate, so that the device can move up and down, the device can be stopped above a vehicle coal seam, coal components can be measured in a non-contact mode, the device can also be embedded into the coal seam to measure the coal components, and when the device is driven to downwards penetrate into the coal seam, the scraper driving motor 11 in the device is synchronously started to drive the swastika scraper to rotate so as to clean the coal in the forward movement.
The second motor 23 drives the external driving device 18 to drive the device to move left and right along the movable beam 20, the third motor 24 can drive the movable beam 20 to move back and forth along the support stand rail 21, the measuring point can be changed at will by driving the device to move left and right and back and forth above the coal of the vehicle, and the depth of the coal is measured by combining the up and down movement, so that the measuring result is more representative.
FIG. 3 shows that the elemental composition of the device of the present invention is tested and tested to obtain the performance index by on-line detection.
Fig. 4 shows that the industrial components of the device of the invention are tested and tested to obtain the performance index on line.
The invention provides a thought and a method of a mobile coal composition rapid detection device with a controllable neutron source, and a method and a way for realizing the technical scheme are many, the above description is only a preferred embodiment of the invention, and it should be noted that, for a person skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the invention, and the improvements and decorations should also be regarded as the protection scope of the invention. The components not specified in this embodiment can be implemented by the prior art.
Claims (8)
1. The movable type coal composition rapid detection device of the controllable neutron source is characterized by comprising a neutron source component, a detector component, a signal processing component, a communication component and a moving component, wherein the neutron source component comprises a neutron tube (1), a neutron source module (2), a neutron tube power supply module (3) and a neutron tube control module (4); the detector assembly comprises a gamma ray detector (5) and a detector protection module (6); the neutron source assembly and the detector assembly are both positioned above the measuring end face (14), and scattering measurement is carried out on coal (17) below the measuring end face (14);
the signal processing assembly comprises a gamma energy spectrum generating module (7), a coal element analyzing module (8) and a coal industry index analyzing module (9); the gamma energy spectrum generating module (7) filters, amplifies and digitizes the pulse signals from the gamma ray detector (5) to generate a gamma energy spectrum; the coal element analysis module (8) completes the gamma energy spectrum identification and analyzes the content of each element of the coal; the coal industry index analysis module (9) analyzes the coal heat productivity, ash content, moisture content, sulfur content and other industry indexes based on the coal element content;
the communication component is internally provided with a communication module (10) and supports internet access communication and wireless communication;
the moving assembly is connected with external driving equipment through an external driving connecting port (13), and can integrally move the detection device and change the measurement point; the device can be driven to rotate integrally by external driving equipment through a screw rod (19), and the scraper driving motor (12) is matched to drive the swastika scraper (11) to advance, so that non-contact measurement can be carried out above coal (17), and the measuring end face (14) can be embedded into the coal (17) for measurement.
2. The mobile type coal composition rapid detection device of a controllable neutron source according to claim 1, characterized in that the neutron source assembly, the detector assembly, the signal processing assembly, the communication assembly and the moving assembly are all integrally encapsulated in a cylindrical shell (16).
3. The mobile type coal composition rapid detection device with the controllable neutron source as claimed in claim 1, wherein the neutron tube (1) is a deuterium-tritium type neutron tube with neutron energy of 14MeV and neutron yield of 2 × 108n/s。
4. The mobile type coal composition rapid detection device with a controllable neutron source as claimed in claim 1, wherein wireless access can be performed by using a computer and a mobile phone client program, and measurement data such as working state parameters, gamma energy spectrum, coal element composition, coal industry composition indexes and the like can be queried.
5. The mobile type coal composition rapid detection device with the controllable neutron source as claimed in claim 1 is characterized in that the neutron source module (2) comprises a neutron moderator and a neutron shield made of bismuth block, graphite block, high-density polyethylene plate material.
6. The mobile type coal composition rapid detection device with controllable neutron source according to claim 1, characterized in that the gamma ray detector (5) comprises NaI (Tl) crystal, photomultiplier and preprocessing circuit.
7. A mobile type coal composition rapid detection device with a controllable neutron source as claimed in claim 6, characterized in that said NaI (Tl) crystal is a cube with 4 x 16 "specification.
8. The mobile type coal composition rapid detection device with the controllable neutron source is characterized in that the detector protection module (6) comprises a neutron protection structure formed by boron carbide and high-density polyethylene plates.
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Application publication date: 20200925 |
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| RJ01 | Rejection of invention patent application after publication |