Air cleansing filters are used in drying systems to:
- Prevent dust and fines carried over from the material in the drying hopper from contaminating the desiccant’s ability to remove moisture
- Clean ambient air used in the regeneration of the desiccant
- Prevent dust from contacting the dryer’s heaters, creating a fire hazard
Keep all filters in the drying system clean to allow the critical airflows of the dryer to do their job.
- Turn the dryer heaters off and allow heaters to cool-off before the blowers are stopped
- Carefully remove the filter elements
- Clean or replace the filter elements
- Air blow or vacuum the filters to remove accumulated dust and fines
- Do not puncture or distort the filters
- Replace filter elements if they are damaged, distorted or can’t be cleaned
- Carefully re-install filter elements so no leaks are allowed around the base of the filter or the filter housing or lid.
Poor filter maintenance is the number one reason for:
- Premature desiccant failure and, as a result, dryer failure
- Reducing process airflow which reduces drying efficiency