Cleaning Methods:

After a period of use, the titanium rod filter element will become partially clogged, which is indicated by a decrease in flow rate and an increase in pressure at the filtration front end. For example, if the pressure rises from below 0.22 MPa to above 0.3 MPa, it is time to clean the filter element. The cleaning methods generally include the following:

1. For newly used filter elements, reverse flushing with water or reverse blowing with gas is typically employed for cleaning. This involves injecting water in the reverse direction at a pressure slightly higher than the working pressure (e.g., 0.3 MPa). The reverse flushing time should be approximately 1-3 minutes.

2. If the filtration efficiency does not significantly improve after multiple reverse flushing attempts, the filter element can be soaked at room temperature in a nitric acid solution with a concentration below 5% or a NaOH solution with a concentration below 10%, followed by rinsing with clean water. The choice between acid washing or alkaline washing should be based on whether the impurities in the filtrate are more soluble in acid or alkali.

Usage Precautions:

1. Avoid scratches, collisions, dust, and oil stains.

2. During operation, the working pressure should not exceed the rated working pressure.

3. During normal use, allow at least 3–5 minutes for low-pressure startup, with the relative pressure difference controlled below 0.5 MPa. Then gradually adjust the working pressure to the normal requirement (maximum pressure should not exceed 0.4 MPa).

4. After operating for a certain period, the pressure may increase and the flow rate may decrease due to clogging of the filter element, necessitating reverse flushing or backwashing for regeneration. The regeneration cycle depends on the rated pressure and flow rate.