GE超滤膜幻灯片 ZW.ppt

Title or job number ZW1500 Module Design Rack Info Key Differentiators Low fouling membrane chemistry Leveraging 15+ years of membrane research Stable chemistry will not need aggressive hot water cleans to maintain performance High Solids Tolerance Ability to handle turbidity spikes up to 150 NTU and coagulant dose up to 40 mg/L Less chemical usage Lower OD fiber allows higher fiber packing density per shell volume ~25 % less chemical volume in shell for same surface area Shorter module requires lower ceiling height On rack fiber repairs Simplified rack design ZeeWeed PFD Process Capabilities Operating Modes Permeation Dead-end filtration TMP up to 40 psi Maintenance Clean (CEB,EFM) Daily Heating optional Recirculation Recovery Clean (CIP) Monthly Heating optional Longer duration Recirculation/relaxation intervals Typical flux range 35 – 80 gfd (application-specific) ZW1500 Flux Selection Guide Backwash Process Sequence and Duration Backwash Sequence Step 1: Backpulse ( at 3.4 m3/hr per module) with aeration (at 8.5 am3/hr per module) for 60 seconds Step 2: Feed-flush (3.4 m3/hr per module) for 30 seconds Maintenance Clean Sequence and Duration Recovery Clean Sequence and Duration Cleaning Sequence Step 1: Fill CIP tank with permeate, heat, add chemical and mix Step 2: Drain modules/rack Step 3: Fill with cleaning solution Step 4: Recirculate 15 minutes (MC)/15 minutes every hour for 5 hours (RC) Step 5: Drain to neutralization tank Step 6: Fill with feed water Step 7: Permeate to neutralization tank Default cleaning solutions: MC: 100 mg/l NaOCl (may be heated to 35°C) RC: 1,000 mg/L NaOCl at 35°C 2 g/L citric acid at 35°C Leak Detection ZeeWeed? 1500 压力式超滤 1,000 ppm Max. Cl2 Concentration 2.0 – 11.0 Cleaning pH Range 40?C (104?F) Max. Cleaning Temperature Cleaning Specifications 5.0 – 10.0 Operating pH Range 40?C (104?F) Max. Operating Temperature 0 to 275 kPa (0 to 40 psi) TMP Range Operating Specifications Outside-In Flow Path 0.9 mm OD / 0.4