Flame temperature field particle gas concentration field measurement method based on hyperspectral image

Abstract

The invention relates to a combustion process measurement technology and provides a flame temperature field particle gas concentration field measurement method based on a hyperspectral image. The method comprises building a hyperspectral flame imaging system, acquiring spatial and spectral radiation image information of flame, building a model and an algorithm according to a flame radiation transfer process and a reverse ray tracing process, calculating a flame temperature, a particle concentration and a gas concentration through the hyperspectral image of flame, and simultaneously reconstructing a flame three-dimensional temperature field, a particle concentration field and a gas concentration field. Compared with the traditional colorful camera, the measurement method can acquire the spatial and spectral projection data of flame and rebuild the mold through a reverse ray tracing method, has short calculation time, realizes online real-time monitoring of flame and has the characteristics of more flame measurement parameters, simple device, short treatment process and real-time online monitoring of flame state change.

Description

technical field [0001] The invention relates to a combustion process measurement technology, in particular to a measurement method based on a furnace flame image. Background technique [0002] Combustion involves various types of complex multiphase flow and chemical reaction systems. It is a process of high temperature, high pressure, multi-objective, multi-constraint, and mutual coupling. The spatial distribution of key parameters such as temperature and concentration is directly related to whether the energy utilization process is Safety, economy and cleanliness are important ways to achieve safe operation of combustion equipment and energy saving and emission reduction. In particular, large coal-fired boilers have the characteristics of large space size and complex environment, and the three-dimensional distribution measurement of key parameters in the combustion process is challenging. Taking a 1,000MW pulverized coal combustion supercritical boiler as an example, the b...

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Problems solved by technology

[0004] However, the current research on field parameter reconstruction based on flame images mainly focuses on the reconstruction of temperature field and the influence of particles.

Since the image obtained by the traditional area array camera has no information in the spectral dimension, and the gas absorption is closely related to the spectrum, this method has not been applied to the reconstruction of the gas concentration distribution at present.

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