Reasons and Prevention of Improper Use of Sintered Felt Filter Cartridges
Incorrect selection of the filter element: One common reason for improper use is selecting a filter element that is not suitable for the current working environment. This could involve choosing a filter with a higher rating than necessary or exposing the filter to pressures beyond its recommended limit, leading to deformation or flattening of the filter element. To avoid this, it is crucial to carefully assess the working conditions and select a filter element that matches the specific requirements.
Improper installation: Another issue is the improper installation of the filter element. If the element is not securely fixed, it can get damaged during the filtration process. To prevent this, ensure accurate and stable installation, following the manufacturer's instructions and guidelines. Properly securing the filter element will help maintain its integrity and effectiveness.
Delayed replacement of blocked filter elements: When the filter element gets severely clogged with contaminants from the workpiece, it becomes essential to replace it promptly. If the filter is not replaced in a timely manner, the pressure differential across the filter element increases, and the element may not withstand the suction forces, leading to damage. Regular monitoring and maintenance, including scheduled replacements and cleaning, are crucial to prevent excessive blockage and ensure optimal performance.
Addressing Solder Joint Appearance Issues in Metal Sintered Felt
Surface treatment methods: To address solder joint appearance issues, various post-treatment methods can be employed. It is important to differentiate between chemical and mechanical methods for effective treatment.
Chemical methods involve metal sintered pickling, which can be done through immersion, using pickling passivation paste, or spray application. Auxiliary passivation can be performed after pickling, and electrolytic polishing is also an option. Chemical methods are effective in removing oxides and contaminants from the surface of metal sintered felt elements.
Mechanical methods, on the other hand, have the potential to remove contamination through wiping, polishing, or abrasive techniques. It is important to note that mechanically cleaned surfaces should be thoroughly cleaned and dried to prevent any residual contamination that could lead to corrosion, especially in humid environments.
Common Cleaning Principles and Methods for Metal Sintered Felt
Chemical cleaning: Acid-base cleaning solutions are widely used for cleaning metal sintered felt. This method is particularly effective for removing polyester condensate and other contaminants from the filter.
Ultrasound cleaning method: Ultrasonic energy is utilized in this method, where continuous pressurization and expansion of wave energy create cavitation and rupture, resulting in effective cleaning.
Heat treatment cleaning: In cases where chemical cleaning methods are not successful, heat treatment methods like vacuum pyrolysis, heated flood tanks, liquefied beds, and hot salt baths can be considered.
After cleaning, it is important to inspect the integrity of the metal sintered felt, paying special attention to the folded parts, and measure the pressure drop across the filter element to ensure its proper functioning.
Stainless steel wire mesh filter from 
Titanium felt
sintered stainless steel filter
