CN
EN
es 
ru 
Nov 08, 2023
Filter cloth, as an important filtration medium, is a critical component of filtration equipment. Over time, clogging issues may occur, making early detection and intervention essential. Here are comprehensive methods for identifying filter cloth clogging and their corresponding indicators.
Decreased Filtration Speed: A clear indicator of clogging-if filtration takes significantly longer under the same operating conditions, the filter cloth pores may be blocked.
Abnormal Increase in Feed Pressure: If system pressure rises significantly above normal levels and remains high, it indicates increased filter cloth resistance and a higher degree of clogging.
Excessive Moisture Content in Filter Cake: If the moisture content exceeds process requirements and is unevenly distributed, partial clogging of the filter cloth may be preventing proper dewatering.
Difficulty in Filter Cake Removal: If filter cake is hard to detach or leaves significant residue, severe clogging on the filter cloth surface may be the cause.
Accumulation of Surface Deposits: Visually inspect the filter cloth for noticeable solid particle buildup or caking, especially around the edges and near the feed inlet.
Performance Not Restored After Cleaning: If multiple backwashes or chemical cleanings fail to restore normal filtration efficiency, deep clogging or filter cloth end-of-life may be the issue.
Pressure Differential Analysis: Comparing inlet and outlet pressure differences—if the pressure differential continuously increases beyond design limits, it can help confirm clogging.
Airflow Permeability Test (for non-liquid filtration scenarios): Blowing air through a dry filter cloth—if air resistance significantly increases, severe clogging is likely.
