1、 Connection method and installation of aeration pipeline:
The aeration device consists of aerators, microporous membrane aerators, microporous aerators, gas distribution pipelines, tees, tees, elbows, regulators, connectors, cleaning devices, etc. The gas distribution pipeline is arranged in a usual circular pattern, and the aerator is arranged with a density according to the gas supply volume and pool shape. The connection between the aerator and the gas distribution pipeline is made of G3/4 thread connection, and the base is internal thread (fixed on the gas distribution pipeline). The aerator is external thread. When installing, first fix the regulator to the bottom of the pool with expansion bolts according to the required size, and then fix the gas distribution pipeline to the regulator with clamps. To prevent other operations such as welding sparks and damage to the aeration device by heavy objects such as concrete during civil engineering, the aerator should be installed before discharging water after the completion of civil engineering. To prevent gas leakage in the pipeline and connecting parts, water should be discharged to a depth of about 10cm beyond the bottom of the aerator for leakage testing. If gas leakage is found in the pipeline connecting part, it should be promptly eliminated. And then officially put into operation.
2、 Main technical parameters:
Aerator size: Φ 215mm, 260mm
Service area: 0.25-0.55m2/piece, 0.35-0.75m2/piece
Average pore size of aeration membrane during operation: 80-100 microns
Air flow rate: 1.5-3m3/h per hour
Total oxygen transfer coefficient: kla (20 ℃) 0.204-0.337min-1
Oxygen utilization rate: (water depth 3.2m) 18.4-27.7%
Oxygenation capacity: 0.112-0.185kgO2/m3h
Oxygenation power efficiency: 4.46-5.19KgO2/kwh
Aeration resistance: 180-280mmH2O
The design of air pipes should consider pressure balance and form a circular network. Each set of intake pipes should be equipped with valves to facilitate the adjustment of air volume. Design flow rate of air pipe: 10-15 meters/second for main pipe; The branch pipe is 5 meters per second. The installation height of the aerator surface from the bottom of the tank is 270mm and 250mm, and the push plate is 200mm.