On-line analysis device of pulsed neutron coal element content and proximate analysis indexes

An element content, pulsed neutron technology, applied in the field of nuclear technology applications, can solve the problems of difficult temperature control of BGO detectors, and achieve the effects of reducing neutron flux, improving accuracy, and avoiding peak drift.

Inactive Publication Date: 2012-07-25
NANJING LONGYUAN ENVIRONMENTAL CO LTD
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Problems solved by technology

Online detection basically belongs to outdoor detection...

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  • On-line analysis device of pulsed neutron coal element content and proximate analysis indexes
  • On-line analysis device of pulsed neutron coal element content and proximate analysis indexes
  • On-line analysis device of pulsed neutron coal element content and proximate analysis indexes

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Experimental program
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Embodiment

[0019] Embodiment: present embodiment structure, as attached figure 1 As shown, it mainly includes the radiation protection body, the coal conveying channel and the detection device in the radiation protection body. The detection device is located below the coal conveying channel; the detection device includes a neutron detector (3), a pulse D-T neutron generator (4) and The main improvement of the BGO detector (9) is that there are lead plate a (5), polyethylene plate (6) and lead plate b (7) between the pulsed D-T neutron generator (4) and the BGO detector (9). ); the BGO detector (9) is placed in the BGO detector constant temperature control system (8).

[0020] In the embodiment, as attached figure 1 As shown, the radiation protection body consists of a lead layer (2), a polyethylene layer (10), a cadmium layer (1) and an iron layer (11) from inside to outside in sequence, and other components are located inside the lead layer (2). The coal (13) is positioned above the c...

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Abstract

The invention belongs to the technical field of nucleus technology application, and relates to an on-line analysis device of pulsed neutron coal element content and proximate analysis indexes. The on-line analysis device comprises a radiation protector, a coal conveying channel and a detection device; the coal conveying channel and the detection device are arranged in the radiation protector; the detection device is positioned below the coal conveying channel; the detection device comprises a neutron detector, a pulsed D-T neutron generator and a BGO (bismuth germanium oxide) detector and is characterized in that a lead plate a, a polyethylene plate and a lead plate b are sequentially arranged between the pulsed D-T neutron generator and the BGO detector; and the BGO detector is positioned in a BGO detector constant temperature control system, with a temperature range kept at -4.5 DEG C to -5.5 DEG C. According to the invention, the on-line analysis device is not influenced by parameters such as changes of coal type, speeds of a belt for conveying coal, thickness changes of coal seams, particle sizes of coal and the like, so that the precision for measuring parameters of coal property is high.

Description

technical field [0001] The invention belongs to the application field of nuclear technology, and relates to a device for quickly analyzing the content of main elements of coal and industrial analysis indexes on-line by using a pulsed D-T neutron generator as a neutron source. Background technique [0002] Using a pulsed D-T neutron generator as a neutron source to quickly analyze coal element content and industrial analysis indicators online is one of the research hotspots in the field of nuclear technology applications. The principle uses the fast and thermal neutrons emitted by the pulsed D-T neutron generator to irradiate the coal on the coal conveyor belt, and the atomic nuclei in the coal undergo inelastic scattering and radiation capture reactions with these neutrons, and release the instantaneous characteristic gamma Rays. The energy of characteristic gamma rays can determine the type of elements, and the total count of characteristic gamma rays can calculate the ele...

Claims

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Application Information

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IPC IPC(8): G01N23/06
Inventor 黄向阳谷德山程道文李仁刚张国栋
Owner NANJING LONGYUAN ENVIRONMENTAL CO LTD
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