How to determine whether ceramic filter plates need to be cleaned？

To determine whether the ceramic filter plate needs to be cleaned, three core indicators can be quickly determined: operating parameters, filtration effect, and visual observation. If any of them are met, cleaning should be arranged:

1. Abnormal operating parameters (the most direct basis for judgment)

When any of the following parameters deviate from normal values, it indicates that the micropores have been blocked and need to be cleaned in a timely manner:

Vacuum degree decrease: The normal vacuum degree of the equipment should be stable at ≥ -0.09MPa. If the vacuum degree is less than -0.09MPa and cannot be restored, it indicates that the micropores are blocked and the vacuum degree is abnormal, and it needs to be cleaned immediately;

Abnormal increase in backwash pressure: If the backwash pressure continues to exceed the design range of 0.08-0.12MPa, it indicates that the microporous channel has been compressed by blockage, resulting in a significant increase in resistance and requiring cleaning and dredging;

The filtration flow rate has significantly decreased: under the same operating conditions, the filtration flow rate has decreased by more than 15% -20% compared to the initial value. After excluding other equipment failures, it can be determined that the filter plate is clogged and needs to be cleaned.

2. The filtering effect does not meet the standard (basis for effectiveness verification)

The filtered product quality cannot meet the requirements, which also indicates that the filter plate needs to be cleaned:

The moisture content of the filter cake exceeds the standard: The moisture content of the cleaned and qualified filter cake should be lower than 9% -10%. If the moisture content of the filter cake continues to be higher than 10% and complete peeling cannot be achieved, it indicates that the blockage has affected the filtration efficiency and needs to be cleaned;

The clarity of the filtrate does not meet the standard: After filtration, the filtrate is turbid with a suspended solids content exceeding 0.08mg/L, indicating that the micropores are blocked and the filtrate does not meet the requirements for filtration. It needs to be cleaned; If the filtrate is red, it is necessary to simultaneously check whether the filter plate is damaged.

3. Visual observation and judgment (rapid screening method)

After shutdown, it is possible to quickly determine whether cleaning is needed through visual observation:

Air Backblowing Test: Use 0.05-0.1MPa air pressure to blow back from the inside of the filter plate outward. If the filter holes cannot bubble evenly and there are local areas without bubbles, it indicates that the corresponding micropores have been blocked and need to be cleaned and unblocked;

Surface observation: Scale and mud deposits are clearly visible on the surface of the filter plate, and micropores are covered. After rinsing with clean water, residual dirt still exists, and chemical cleaning needs to be arranged.