Characteristics of pressure loss during filtration using a porous ceramic filter
Abstract
Characteristics of pressure loss during filtration was studied using a porous ceramic filter (PF). Immediately after the filtration started, collected particles formed a thin layer on the PF surface, which was transferred to cake filtration. Pressure loss during filtration was expressed as the sum of the loss in the filter and that in the particle layer. The effect of plugged surface pores with fine particles was evaluated as the change of permeability. Increase rate of pressure loss during filtration was proportional to the particle concentration, 2.6 power of the filtration rate and square of the specific surface area. When the filtration rate became larger, however, the porosity decreased and pressure loss increased because the pressure gradient increased in the collected particle layer and the particle layer was compacted. It is necessary to elucidate the compacted properties of collected particle layer to estimate more accurately the pressure loss.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- April 1987
- Bibcode:
- 1987STIN...8826604I
- Keywords:
-
- Air Filters;
- Ceramics;
- Dust Collectors;
- Filtration;
- Permeability;
- Pressure Reduction;
- Compacting;
- Flow Velocity;
- Losses;
- Plugging;
- Porosity;
- Fluid Mechanics and Heat Transfer