On-Site Performance Testing of High-Temperature Axial Flow Fans in Treatment Systems

On-Site Performance Testing of High-Temperature Axial Flow Fans in Treatment Systems

In recent years, the capabilities of high-temperature axial flow fans have been continuously developed and successfully applied in treatment systems. In particular, with the acceleration of urbanization and the rapid development of industry and agriculture in China, the volume of urban wastewater discharge has been increasing year by year. This increase in urban wastewater discharge has impacted the wastewater treatment industry, creating pressure and challenges, as sewage treatment capacity needs to be increased eightfold. However, China’s current urban wastewater treatment rate remains relatively low, with a significant gap compared to some developed countries worldwide. At the same time, traditional high-temperature axial flow fans cannot meet development requirements due to their low efficiency and high noise levels. High-temperature axial flow fans that deliver excellent performance under high-flow conditions are gaining popularity. Through practical application, we have found that high-temperature axial flow fans are highly efficient and consume minimal energy, making them suitable for large and medium-sized wastewater treatment plants. This technology can be widely adopted in the wastewater treatment industry. The following is a brief description of the on-site performance testing process for high-temperature axial flow fans in treatment systems. First, the displacement method is used to measure 15 parameters, including atmospheric pressure, static pressure, dynamic pressure, and fan speed. Next, motor data is measured. The three voltages were 4230, 4230, and 4100 V, with currents of 360, 374, and 380 A, and the motor’s input power was 2419 kW. Simultaneously, at 102,320 Pa and 20°C, flue gas analysis indicated a gas density of 1.1512 kg/m³, and the motor’s standard data was recorded. Generally, the inlet and outlet dampers are fully open, and the high-temperature axial fan is directly connected to the motor. Motor efficiency data is provided by the manufacturer, and pressure loss data is provided by the outlet damper manufacturer. Based on the above data, the losses from the outlet damper and the fan are calculated and converted to the specified conditions to complete the test.