Tsurumi Submersible Aeration (1846 Kb) - Ferret

▼ 7-2-5. Selection Procedure (Example)Condition - Water Depth of 10m, Required Oxygen Transfer Rate of 16.5kgO 2 /h (clean water), 200V, 50HzIn case of Submersible Aerator + General purpose BlowerProviding a safety factor of 10% for the required oxygen transfer rate, the required oxygen transfer rate shall be18.2kgO 2 /h.Refer to p.16 7-2-9. Oxygen Transfer Rate vs. Air Flow Rate Curve (combination with blower - 50Hz), and Model80TRN47.5-52 (7.5kW) can be selected. The required air flow rate shall be 180m 3 /h.Refer to p.18 7-2-11. Discharge Pressure of Blower vs. Air Flow Rate Curve (combination with blower - 50Hz,estimate). When the air flow rate required is 180m 3 /h (3.00m 3 /min), the required discharge pressure shall be0.053MPa (53kPa).In case that a margin of 5kPa is added to the discharge pressure of the blower (considering the pressure loss inthe pipe and a margin), the blower should have a duty of 53 + 5 = 58 kPa.Required air flow rate shall be 3.15m 3 /min. including 5% allowance. Model RSR-80 (1370min –1 , 3.20m 3 /min, at58.8kPa, 5.01kW) can be selected,The total required power is 〔7.5 + 5.01 = 12.51kW〕▼ 7-2-6. Recommended Tank Dimensions (combination with blower)BlowerDimension of Sub-convectionAir-inlet Bore[mm]5080ModelMotor Output[kW]50TRN42.2-52/62 2.250TRN43.7-52/62 3.750TRN45.5-52/62 5.580TRN47.5-52/62 7.580TRN412—52/62 1280TRN417-52/62 17100 100TRN424—52/62 24150 150TRN440—52/62 40Installation WaterDepth h[m]Discharge Pressure[kPa]6 248 449.6 606 208 4010 606 208 4010 606 208 4010 606 208 4010 606 208 4010 606 208 4010 606 208 4010 60Circular Tankφa[m]Square Tanka[m]6 5.57 6.59 810 912 1113 11.514.5 1317 15✳ The above table shows the estimated values under the condition that the self-aspiration water depth d (installationdepth h – Pressure depth covered by the blower) be 4 meters. The aerating depth of 2.2kW model is 3.6 meters. Forother operating conditions, refer to p.18 7-2-11. “Discharge pressure of Blower vs. Air Flow Rate Curve (combinationwith blower - 50Hz)”, or p.19 7-2-12. “Discharge pressure of Blower vs. Air Flow Rate Curve (combination withblower - 60Hz)”.✳ Discharge pressures in above do not include the pressure loss in the piping. It is required to calculate and add it to theabove value when selecting the blower.✳ It is recommended that a haunch be provided between each sidewall and the bottom of the tank so as to maintain themixing efficiency.✳ Only the above models are applicable to the combined use of an aerator and a blower.✳ Refer to “4-1. Typical Convection Pattern” and “4-2. Shape of Aeration Tanks” on page 4 for explanations on thetank shape and the dimension.14Australian Pump Industries (02) 8865 3500