Filtration

GORE® Membrane Technology versus Non-Membrane Media

GORE® Membrane Technology versus Non-Membrane Media (805 KB  PDF)

Longer Bag Life, Lower Emissions Rates, Lower Pressure Drops, Better Gas Throughput


Non-Membrane Depth Filtration

Filtering Mode

  1. Dust is filtered inside of filter media
  2. Internal dust cake buildup required
  3. Particles enter into filter media and can pass through
  4. Might not filter finest particles
  5. Efficiency requires careful balance between filter, particulate, and system conditions

Cleaning Mode

  1. Difficult to remove particles, only surface dust cake is removed
  2. Dust deep inside media can cause higher Dp and blinding with time
  3. Dust buildup inside media can lead to emissions after cleaning

Membrane Surface Filtration

Filtering Mode

  1. Dust filtered at membrane surface
  2. No dust cake buildup required
  3. No particles enter backer
  4. Capable of submicron filtration
  5. Maintains capture efficiency over wide range of system conditions

Cleaning Mode

  1. Almost all dust falls off membrane surface
  2. Particles do not build up inside backer
  3. Surface is hydrophobic, even wet dust cakes can still be handled