Transmission-type online detection device for coal characteristic indexes

A detection device and characteristic index technology, which is applied in the field of coal characteristic index detection device and transmission type coal characteristic index online detection device, can solve problems such as difficult installation, maintenance and use of isotope neutron sources, increased technical difficulties, and difficult handling

Inactive Publication Date: 2012-12-26
南京威测环保科技有限公司
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Problems solved by technology

[0004] It can be seen that the following defects exist in the prior art. The isotopic neutron source used in the measurement and analysis is not easy to install, maintain and use, and the source material is tight, difficult to obtain, and difficult to handle
And the technical problems that need to add other technologies (such as microwave technology) to realize the online detection of moisture in coal

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  • Transmission-type online detection device for coal characteristic indexes

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] refer to figure 1 , in the transmission-type coal characteristic index online detection device of the present invention, the neutron energy produced by the electrically controllable deuterium-deuterium micro-accelerator 1 is 14-17 MeV, and is placed in a lead reflector 2 with a special structure, and the lead reflector 2 is used for multiplying The sub-yield; the moderator 3 of special size and structure is placed between the lead reflector 2 and the transmission belt 18 to further slow down the fast neutrons produced; the electrically controllable deuterium deuterium miniature neutron generator 1 is placed Below the belt, the bismuth germanate detector 5 and the boron-coated MRPC thermal neutron detector are arranged in a transmission and eccentric arrangement, and the distance between the center of ...

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Abstract

The invention discloses a transmission-type online detection device for coal characteristic indexes. Neutrons generated by an electrically controllable deuterium-tritium micro-accelerator with an electrically controllable range of 14-17 MeV are irradiated on coal flow passing through a transmission belt and nuclearly reacted with main nuclides in the coal flow, so as to generate characteristic gamma rays; the characteristic gamma rays are unique, like human fingerprints and are commonly called nuclear fingerprints; the nuclear information is collected by utilizing a special sensor; all the main nuclides in coal can be detected on line by utilizing modern mathematical analysis technology according to the properties of the characteristic gamma rays; and moisture content, ash content and a heat value in the coal are analyzed in combination with a neutron moisture detection technology. The transmission-type online detection device has the characteristics as follows: elements and industrial characteristic indexes in all coal flow can be detected on line in real time without influence of coal types and granule sizes.

Description

technical field [0001] The invention belongs to the technical field of coal composition and characteristic index detection, and relates to a coal characteristic index detection device, in particular to a transmission type coal characteristic index online detection device. Background technique [0002] At present, nuclear technology has been used as a routine technology in various measurement and analysis. It has many advantages that other analytical techniques do not have. Because the neutron is not charged, it has a strong penetrating ability, especially when the neutron reacts with the substance in a very short time (10 -10 seconds) to emit characteristic gamma rays to detect the main component content of the material. In recent years, on-line detection devices for material composition based on neutron technology have been widely used in cement, coal, ore and other fields. However, they are basically based on isotopic neutron sources or scattered 14MeV electrically contr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/09
Inventor 单卿凌永生黑大千
Owner 南京威测环保科技有限公司
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