▎Introduction to Titanium Rod Filters

Titanium rod filters utilize titanium rod filter elements. These elements are hollow tubular filters manufactured using powder metallurgy technology, wherein titanium metal powder is subjected to high-temperature sintering; they function as depth filters. The housing of the titanium rod filter is constructed from 304 or 316L stainless steel. The titanium filter elements offer numerous advantages, including high filtration precision, high mechanical strength, resistance to high temperatures and corrosion, zero particle shedding, non-adsorption of filtered substances, a long service life, ease of cleaning, and regenerability.
Titanium rod filters are widely employed for liquid-solid separation across various industries, including food and beverage, pharmaceuticals, and chemicals. Within the pharmaceutical sector, they are particularly well-suited for decarbonization filtration in production lines for large-volume infusions and injectable preparations.

▎Key Technical Parameters of Titanium Rod Filters

1. Filtration Precision: 0.45 µm – 30 µm
2. Filtration Flow Rate: 1 T/h – 10 T/h
3. Operating Pressure: ≤ 0.3 MPa
4. Operating Temperature: ≤ 200°C
5. Filter Element Lengths (in inches): 10, 20, 30, 40
6. Filter Element Connection Types: 222, 226, Threaded
7. The new-generation titanium rod filter features a structural design that departs from the traditional "flip-over" style; this innovation eliminates the need to dismantle associated piping during installation and removal, making operation and cleaning significantly more convenient and efficient.

▎Cleaning of Titanium Rod Filters

After a period of use, titanium rod filter elements will inevitably experience a certain degree of clogging. This manifests as a decrease in flow rate and an increase in pressure upstream of the filter—for instance, rising from below 0.2 MPa to above 0.3 MPa. At this point, the filter element requires cleaning. The general cleaning methods are as follows:
1. For newly used filter elements, cleaning is typically performed via a combination of water backwashing and gas back-blowing. This involves injecting clean water in the reverse direction at a pressure slightly higher than the normal operating pressure (e.g., 0.3 MPa). A backwashing duration of approximately 1 to 3 minutes is sufficient.
2. If, after multiple backwashing cycles, the filtration efficiency does not show a significant recovery, the element may be soaked at room temperature in a solution of hydrochloric acid (≤ 5%), sulfuric acid (≤ 8%), or sodium hydroxide (NaOH, ≤ 10%), followed by a thorough rinse with clean water.
The specific choice between acid cleaning and alkaline cleaning should be determined based on whether the impurities present in the filtrate are more readily soluble in acids or bases.