Causes and troubleshooting of common faults in ultrafiltration equipment
1. Low influent pressure or insufficient intake of water
Possible reasons: Ultrafiltration pretreatment blockage, insufficient pressure of ultrafiltration intake pump, smaller pipe diameter, and valve failure.
Elimination means: cleaning or replacing filter materials or devices, replacing larger booster pumps, replacing pipes with larger diameters, and replacing valves.
2. Water production decreased by more than 20% of the initial stable yield.
Possible reasons: ultrafiltration membrane is polluted, transmembrane pressure difference is too small, the quality of raw water is deteriorated, the temperature of raw fluid is reduced, pretreatment is insufficient, and maintenance is improper.
Elimination means: chemical cleaning and adding medicine and sterilization, increase water pressure, but not more than 0.3Mpa. and TMP less than 0.2Mpa, improve the pretreatment, make it meet the requirements of ultrafiltration, increase the temperature of the raw liquid or increase the pressure of water but not more than 0.3Mpa. and TMP less than 0.2Mpa, check and improve the pretreatment, strengthen maintenance, and replace. Damage equipment
3. A sudden increase in pressure gauge pressure
Possible reasons: the failure of pneumatic butterfly valve
Elimination means: check the malfunction of pneumatic butterfly valve or control circuit.