Abstract
Numerical simulation software is developed and carried out on the furnace of a 1100t/h boiler. Heat load distribution and heat deviations on water-walls were obtained. The numerical results are basically consistent with that from experiments. Two operating conditions were adopted with different swirl velocity arrangements. In condition I, tangential velocities from two burners sharing the same height and same wall, turn upward at the side close to the central line of the furnace, which turn downward in condition II. Results show that, heat load distribution varies a lot, among water-walls and among different locations in the same water-wall, especially at the corners, where bad stress concentration may form; in condition II, the flame center appears at lower position, temperature distribution is more uniform, and the difference of heat load distribution between water-walls is less evident. These results provide important reference value for water-wall safety of large capacity utility boilers.
