DOW UF Cleaning Process
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Maximum Inlet Pressure Air Flow per Module Duration Air-Water Mix Entrance Pressure Air Quality Frequency Duration Cleaning Solutions Frequency Duration Cleaning Solutions Cleaning Flux per Module Temperature Range Air Scour CEB ClP Backwash Frequency Backwash Duration Backwash Flux
Transcript of DOW UF Cleaning Process
Maximum Inlet PressureAir Flow per ModuleDurationAir-Water Mix Entrance PressureAir QualityFrequencyDurationCleaning SolutionsFrequencyDurationCleaning SolutionsCleaning Flux per ModuleTemperature RangeAir ScourCEBClPBackwash FrequencyBackwash DurationBackwash FluxOnce every 20 to 60 minutes ( water source or pilot test results)40 to 120 seconds100 to 150 l/m2h (60 - 90 gfd)2.5 bar (36 psi)5 to 12 Nm3/h (3 - 7 scfm)20 to 60 seconds per cycle 1.0 bar (14 psi)Non-oil compressed airAs neededBackwash Time plus soak 5 to 20 minutes0.1 % HCl, 2% Citric, 2% Oxalic 0.1% NaOCl, 0.05% NaOHWhen TMP exceeds 1.0 bar above starting TMP (at same temperature)120 minutes (recycle and soak) or longer0.2% HCl, 2% Citric, 2% Oxalic0.1%NaOH +0.2% NaOCl1.0 1.5 m3/h (6.6 - 8.8 gpm)10 to 40 C (34 - 104 )
