On-line measuring device for carbon content in fly ash based on infrared reflection and light pulsation
A fly ash carbon content and measuring device technology, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as poor stability and accuracy, water content variation errors, rising production and maintenance costs, etc. To achieve the effect of improving accuracy
Active Publication Date: 2018-11-09
ZHEJIANG UNIV
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Problems solved by technology
[0004] At present, there is a large time delay in the traditional loss-on-combustion method, which is usually measured offline, and its measurement results cannot reflect the current combustion conditions of the boiler, so it cannot guide the daily and real-time operation of the boiler
However, the microwave carbon measurement method adopted by some power plants is obviously affected by the coal composition, and the change of water content will cause a large error; in addition, because the sampling gun is required to take samples in the flue, the clogging of the measurement chamber also limits its further promotion.
As for the radiation method, on the one hand, it is affected by the particle size and concentration of the fly ash, so the stability and accuracy are poor; on the other hand, the high risk of gamma rays requires a good protection device, which increases the production and maintenance costs of the equipment and is less economical. Difference
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[0029] Referring to the accompanying drawings, the implementation method of the present invention will be described in detail below.
[0030] Such as figure 1 As shown, the online measurement device for carbon content in fly ash based on infrared reflection and light pulsation in the present invention includes two infrared detectors 3, 5, and an infrared laser 7 that can generate 1.064 μm infrared rays; two infrared detectors 3, 5 are connected to the corresponding light intensity meters 4, 6 through wires; the infrared laser 7 is connected to the transmission fiber 1 through the multimode fiber 8, and the end of the transmission fiber 1 is used as the transmitting head; the transmitting head and the infrared detector are 3 pairs To set, and take its line as the center line; The line between the emitter and the infrared detector 5 is at an angle of 45 degrees to the center line; Keep a distance of 30-40mm.
[0031] The on-line measuring device also includes a host computer, ...
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The invention relates to a fly dust carbon content measuring technology, and aims at providing a technology for measuring carbon content in fly dust by infrared reflection and a scattering theories. The infrared reflection and optical pulse-based fly dust carbon content online measuring apparatus comprises two infrared detectors and one infrared laser; the two infrared detectors are connected to respective matched light intensity meters by leads; the infrared laser is connected to a transmitting optical fiber by a multimode fiber and uses as a tail end of the transmitting optical fiber as a transmitting end. The fly dust carbon content online measuring method is realized by mounting the online measuring apparatus in a flue for computing and analyzing. The Infrared reflection and optical pulse-based fly dust carbon content online measuring method and apparatus overcome various defects of a fly dust carbon content measuring method, real time measuring of the fly dust carbon content is realized by infrared reflection and optical pulse theories, a measuring error caused by fly dust concentration and particle distribution can be corrected and precision is improved.
Description
technical field [0001] The invention relates to a technology for measuring carbon content in fly ash, in particular to a technology for measuring carbon content in fly ash based on infrared reflection and scattering theory. Background technique [0002] The optimal control of boiler combustion efficiency has always been an important issue in the production of thermal power plants. The content of unburned carbon directly reflects the combustion economy of boilers, and the value reflects the management level, equipment health level and economic benefits of thermal power plants to a certain extent. . Real-time detection of carbon content in fly ash will help guide correct adjustment of air-to-coal ratio during production and operation, and improve boiler combustion control level; reasonable control of carbon content in fly ash will help reduce power generation costs and improve unit operation economy. It is of great significance to improve the efficiency of power plants. [0...
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IPC IPC(8): G01N21/17
Inventor 吴学成岑可法陈玲红高翔邱坤赞周昊
Owner ZHEJIANG UNIV