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A method for detecting the gas-phase alkali metal concentration in a hydrocarbon combustion flame

A technology of burning flame and metal concentration, which is applied in the direction of material excitation analysis, etc., can solve the problems of alkali metal detection error, achieve low cost, realize spatial fixed-point monitoring, and achieve the effect of small detection error

Active Publication Date: 2018-08-21
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

This method does not require a laser light source and is easy to implement in the industrial field. However, this method, like LIBS technology, also needs to perform a calibration process on a flame with a known alkali metal concentration to determine the coefficients of the established model. If the calibration is not accurate , will bring errors to the detection of alkali metals in the actual flame

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  • A method for detecting the gas-phase alkali metal concentration in a hydrocarbon combustion flame
  • A method for detecting the gas-phase alkali metal concentration in a hydrocarbon combustion flame
  • A method for detecting the gas-phase alkali metal concentration in a hydrocarbon combustion flame

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[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0048] Such as figure 1 As shown, a method for detecting the concentration of gaseous alkali metals in a hydrocarbon combustion flame provided by the embodiments of the present invention mainly includes the following steps:

[0049] (1) Obtain the self-emission spectrum intensity of the flame in the visible wavelength region

[0050] The self-emission spectrum signal from the flame is received...

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Abstract

The invention discloses a detection method of gas-phase alkali metal concentration in hydrocarbon combustion flame, which includes the steps of: 1) obtaining the self-emission spectrum intensity of the flame in visible light wavelength zone and correcting the self-emission spectrum intensity to obtain corrected self-emission spectrum intensity; 2) according to the type of the flame and the corrected self-emission spectrum intensity, calculating flame temperature and alkali metal emission spectral line intensity; 3) calculating alkali metal atom number concentration under a ground state in the flame according to the flame temperature and alkali metal emission spectral line intensity and calculating the total alkali metal atom number concentration in the flame; and 4) according to the total alkali metal atom number concentration in the hydrocarbon combustion flame, calculating the mass concentration of the gas-phase alkali metal in the flame. The method is free of calibration for determine coefficients in the model, is easy to achieve, and is suitable for accurately detecting the gas-phase alkali metal concentration in combustion flame of a high-alkaline hydrocarbon fuel.

Description

technical field [0001] The invention belongs to the field of combustion detection, and more specifically relates to a method for detecting gas-phase alkali metal concentration in a hydrocarbon combustion flame. Background technique [0002] Hydrocarbon fuels are the main source of energy consumption, including fossil fuels (coal, oil, natural gas) and their derivatives, biomass fuels (wood, straw, etc.), and municipal solid waste for combustion. Some hydrocarbon fuels are high-alkaline hydrocarbon fuels, such as Zhundong coal, biomass, municipal solid waste, chemical waste alcohol and waste oil, etc., which contain more alkali metals, mainly sodium (Na) and potassium (K). The alkali metals in these high-alkaline hydrocarbon fuels are easy to volatilize during the combustion process and enter the gas phase. At high temperatures, they will cause problems such as combustion slagging, contamination of the heating surface, ash accumulation, and even corrosion, which will affect t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/63
CPCG01N21/63
Inventor 娄春黎康星
Owner HUAZHONG UNIV OF SCI & TECH
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