关键词:

气流床气化炉, 水冷壁, 渣层, 热应力

Abstract:

Gasification experiment was performed in a bench-scale membrane wall entrained-flow gasifier and the work conditions were altered during the process.A two-dimensional model for the membrane wall was established to simulate the temperature and thermal stress changes.Results indicated that both the circumferential and the radial stress increases with the temperature rising in the membrane wall and slag layer, and the circumferential stress is relatively greater than the radial one.On the interface of slag and silicon carbide layer, the equivalent stress increases rapidly and then reaches to a steady state with the distance from the selected node to the water tube and the slag nail.Significant difference in the equivalent stress was observed for different materials.

Key words:

气流床气化炉, 水冷壁, 渣层, 热应力