| 摘要 |
<p>Particle-laden gas passes downwardly through an inlet duct (11) into inlets of several wedge-shaped deceleration chambers (13A) formed by vertical plates (13) radiating from a central region below the bottom of the inlet duct. The inner ends of the plates and the inlets of the chambers are vertically below the bottom of the inlet duct. In each chamber the gas first proceeds towards a particle exit at the bottom of the chamber, then reverses direction and passes upwardly into filter units (12) above wider parts of the chamber, depositing some heavy particles near the particle exit. To purge the chambers and filter units, suction means are connected to an outlet duct (25) and one or more inlets to the chambers are closed off (16, 17) from the inlet duct simultaneously with the particle outlet(s) of the same chamber(s) being opened (23, 24) to said outlet duct. </p> |
