Precautions and cleaning methods for the titanium rod filter during use

The titanium rod filter uses a titanium powder sintered filter element, which is generally used for coarse filtration or intermediate filtration. This filter element has the advantages of high precision, high temperature resistance, corrosion resistance, and high mechanical strength. It is widely used in the pharmaceutical industry and its outer shell material is 316L or 304 stainless steel. It complies with GMP standards.

During the use of the titanium rod filter, the following points should be noted:
1. Avoid scratches and collisions, as well as dust and oil stains.
2. The working pressure during use should not exceed the rated working pressure.
3. During normal use, there should be at least 3-5 minutes of low-pressure startup time. The relative pressure difference should be controlled below 0.5 Mpa, and then gradually adjust the working pressure to the normal required value (the high pressure should not exceed 0.4 MPa).
4. After a certain period of operation, if the pressure rises and the flow rate decreases due to the blockage of the filter element, backwashing or regeneration is required. The regeneration cycle depends on the rated pressure and flow rate.

After a certain period of use, the titanium rod filter element will produce a certain degree of blockage, manifested as a decrease in flow rate, an increase in the pressure at the filter front, for example: from 0.22 Mpa below to 0.3 Mpa above. At this time, the filter element needs to be cleaned. The cleaning methods are as follows:
1. For newly used filter elements, generally, the cleaning is carried out by using the method of reverse flushing with clean water and gas backblowing, that is, using slightly more than the working pressure (such as 0.3 Mpa) to flush in the reverse direction with clean water. The reverse flushing time is about 1-3 minutes.

2. For those that have been backflushed multiple times and the filtering effect does not recover significantly, 5% or less hydrochloric acid solution, or 8% or less sulfuric acid solution, or 10% or less NaOH solution can be used for soaking at room temperature, and then washed with clean water. The specific choice of acid washing or alkali washing should be based on whether the impurities in the filtrate are easily soluble in acid or alkali.