In the present work, optical measurement of soot particles has been performed to evaluate emission characteristics of a newly designed tubular flame burner for heavy-oil. Principles of measurement system were based on thermography, infrared spectroscopy, and laser extinction. The furnace in which the tubular flame burner was installed has a cross-section of 3m×3m and its total length is about 6m. The experimental results show that thermographic images of soot particles, soot temperature and kcl can be obtained in the practical scale furnace by the present measurement system. Volumetric soot concentration measured by laser extinction method agrees well with that estimated from output of a smoke meter placed in the exhaust tunnel of the furnace.
