Efficient operation of fabric filter collection systems (baghouses) is crucial in achieving maximum removal of particulate matter from gas streams. Of the factors affecting baghouse performance, the equal distribution of flow between individual compartments, velocity levels at the bottom of the bags, and the trajectories of the target particulate are of primary importance.
Optimizing baghouse performance involves the use of flow controls to evenly distribute the particulate laden gas stream to each compartment and protective devices to prohibit premature filter bag wear. Using physical flow modeling, empirical data of the particulate distributions can be measured. Wear zones can be identified quantitatively or determined by measuring the velocities impacting the filter.
Controls are developed both to meet the levels of inlet and outlet gas flow uniformity specified for optimum baghouse performance (such as those detailed in ICAC Publication No. F-7) and to minimize overall system pressure losses.
Members of Alden’s Air & Gas Flow Modeling Group have written two key EPRI reports on fabric filter design:
- Development of Guidelines for Optimum Baghouse Fluid Dynamic System Design, EPRI Report CS-2427
- Fluid Dynamic Design Guidelines for Utility Fabric Filter Systems, EPRI Report CS-3811
