Simulation study on radiative imaging of pulverised coal combustion in blast furnace raceway

Abstract

Radiative imaging of pulverised coal combustion in the blast furnace raceway plays an increasingly important role in working state diagnosis and monitoring in real time. This paper presents a new method for calculating the radiation of three‐dimensional (3D) combustion flames based on the Monte Carlo method and charge coupled device (CCD) imaging. The relationship between two‐dimensional radiative image and 3D radiant energy in the blast furnace raceway was studied by numerical simulation of the combustion process in this study. The radiative images obtained from the blow pipe peephole of a blast furnace tuyere not only present the energy distribution on the CCD camera target plane but also examine 3D temperature distribution in the blast furnace. The numeral temperature field matching the actual combustion can be obtained by a proposed numeric image processing technique.

Keywords:

• Pulverised coal
• Raceway
• Monte Carlo method
• 3D temperature field reconstruction
• Radiation image

The authors are grateful to the National Natural Science and Shanghai Baosteel Foundation (grant no. 50374085) for support.