What factors affect the cleaning time setting of self-cleaning filters?

Influencing Factors of Self-cleaning Filter Cleaning Time

1. Water Quality and Impurity Conditions

The higher the content of suspended solids and the concentration of sediment and contaminants, the shorter the cleaning interval and the longer the single cleaning duration shall be set.

For hard granular impurities, a moderate cleaning time is sufficient; while viscous, fibrous and algal contaminants require extended cleaning and drainage time.

In case of unstable water quality with fluctuating impurity levels, an excessively long cleaning cycle shall be avoided to prevent screen blockage.

2. Filtration Accuracy

Higher filtration accuracy (denser mesh and smaller micron rating) leads to easier clogging, which requires shorter intervals and more frequent self-cleaning.

3. System Flow and Pressure

When the equipment operates with high rated flow and heavy water load, contaminants accumulate faster on the screen, demanding more frequent cleaning.

Low pipeline working pressure weakens the sewage discharge suction, so the single cleaning time needs to be prolonged to ensure thorough dirt removal.

4. Equipment Structure

Brush-type filter: High scraping efficiency, allowing a shorter single cleaning time.

Suction-type filter: Relies on negative pressure dirt absorption; longer suction time is required under heavy contamination.

Scraper-type filter: Designed for viscous media; extended cleaning and scraping time is mandatory.

5. On-site Operating Conditions

For 24-hour continuous operation, short-cycle timed cleaning shall be configured as backup; longer intervals are acceptable for intermittent operation.

To protect downstream precision equipment such as reverse osmosis systems and heat exchangers, the cleaning frequency shall be increased to guarantee stable filtration performance.