关键词:

陶瓷过滤器, 脉冲反吹, 瞬态流场, 数值模拟

Abstract: On the basis of experimental results, the flow in the pulse-jet space and inside ceramic candle filter is regarded as a two-dimensional, unsteady, compressible and axisymmetric flow. The flow across the ceramic tube wall is considered as unsteady Darcy flow. The k-ε two-equation turbulence model and energy equations are used to account for the turbulence and heat-transfer effects. The flow procedure can be used to calculate the transient flow characteristics of rigid ceramic candle filter during the whole pulse cleaning process. The numerical predictions of flow field are in good agreement with the experimental measurements.The effects of pulse gas temperature and filter operating temperature on flow field are numerically investigated. The numerical calculations provide the theoretical basis for optimum design of pulse cleaning system and understanding of the filtration mechanism inside ceramic filter.

Key words:

陶瓷过滤器, 脉冲反吹, 瞬态流场, 数值模拟