Yixing Model 215 Arch Aerator

Advantages 
    The diaphragm microporous aerator is the latest aeration device developed in the 1980s. It features small bubble diameter, large gas-liquid interface area, uniform bubble diffusion, no pore clogging, and strong corrosion resistance. Tests conducted by the School of Environmental Engineering at Tongji University in Shanghai and the North China Municipal Engineering Design Institute, including clean water and sewage oxygenation tests, along with over 50 users' years of satisfactory operation, demonstrate its excellent performance (40% energy reduction compared to conventional fixed spiral aerators, diffused aerators, and perforated pipe aerators, or a 40% increase in sewage treatment capacity). It is particularly suitable for new construction, expansion, and renovation of old aeration tanks in urban sewage treatment and large factories, and the aeration tank can operate intermittently.

Aeration Pipeline Connection and Installation
    The aeration system consists of aerators, air distribution pipes, tees, elbows, regulators, connectors, and cleaning devices. The air distribution pipes are typically arranged in a ring pattern, with aerator density based on air supply and tank shape. Aerators and air distribution pipes are connected via G3/4 threads, with the base having internal threads (fixed to the air distribution pipe) and the aerator having external threads. During installation, first secure the regulator to the tank bottom with expansion bolts according to the required dimensions, then fix the air distribution pipe to the regulator using clamps. To prevent damage from other operations such as welding sparks and construction activities like concrete pouring, aerators should be installed after civil engineering work is completed and before filling the tank with water. To check for leaks in pipes and connections, fill the tank with water to a level 10 cm above the aerators and conduct a pressure test. If leaks are found in the pipe connections, address them promptly before正式 operation.

Main Technical Parameters
    Aerator specifications: 260 type, 215 type                                           Oxygen utilization rate: (water depth 3.2mm) 18.4-27.7%
    Service area: 0.35-0.75m2/unit, 0.25-0.55m2/unit               Oxygenation capacity: 0.112-0.185 KgO2/m3h
    Average pore size of aeration membrane during operation: 80-100 microns                            Oxygenation efficiency: 4.46-5.19 KgO2/m3h
    Air flow rate: 1.5-3 m3/unit h                                                    Aeration resistance: 180-280 mmH2O
    Total oxygen transfer coefficient: k1a(20°C) 0.204-0.337 min⁻¹
    The air pipe design should consider pressure balance, preferably forming a ring network. Each inlet pipe should have a valve to facilitate air volume adjustment. The design velocity for air pipes: main pipe 10-15 m/s; branch pipe 5 m/s. Installation height of aerator surface from tank bottom: 270mm, 250mm, and 200mm for push-plate type.