Pulse‐Jet Bag Filter Flow Field Design Based on Intake Kinetic Energy Dissipation

The pulse‐jet bag filter suffers from short bag life and low dust sedimentation efficiency. To address this issue, this study establishes a kinetic energy–dissipation model based on the Reynolds stress transport equation to analyze the energy‐dissipation mechanism and designs three intake duct configurations guided by the core principle of early kinetic energy dissipation—rather than by uniform airflow distribution. CFD‐DPM simulations were validated against experimental velocity measurements at monitoring points (maximum deviation 9.8%). The dissipation‐box intake duct reduces the maximum airflow velocity from 22.3 to 6.1 m s −1 and equipment resistance from 1279.2 to 1237.9 Pa. Kinetic energy density in the hopper and middle casing decreases by more than 60%. Early dissipation of intake kinetic energy without increasing resistance extends bag life and improves dust sedimentation efficiency, offering new insights for pulse‐jet bag filter optimization.