How Industrial Boiler Fans Operate in Wastewater Treatment

Based on the performance curve of the industrial boiler fan, as well as operational data and operating conditions from on-site testing, the inlet air flow rate at the overpressure control point is calculated. By altering the operating mode of the industrial boiler fan’s switching mechanism, blockages in the aeration plates and fan output resistance can be reduced, thereby bypassing the fan’s operating point. A restrictor is installed at the inlet of the industrial boiler fan, creating a small flow. If the angle of attack of the propeller changes, the characteristics of the industrial boiler fan will also change. To ensure the safe operation of industrial boiler fan equipment in wastewater treatment and to prevent sudden surges in fan usage, the characteristics of surge phenomena are introduced, and the causes of such surges are analysed. Vibrations caused by industrial boiler fans in wastewater treatment and preventive measures are also discussed. From a design perspective, various commonly used methods for calculating oxygen demand are compared to derive a formula for oxygen demand applicable in process design. Consequently, the scope for operational adjustments is expanded. Based on test results, efficiency decreases steadily following flow rate adjustments. It is recommended not to rely solely on direct analysis of the sound field, as this provides useful information for reducing noise from industrial boiler fans. Firstly, the unsteady flow field within the industrial boiler fan is calculated using the finite volume method. Based on fundamental acoustic theory, the location and type of the primary aerodynamic noise sources in industrial boiler fans are determined. This method is applied to calculate industrial boiler fans, and the analysis results are compared with actual noise measurement data. Practical experience demonstrates that this method effectively identifies the location and type of airborne noise sources. Based on the results of improved structural strength calculations, the design optimisation aims to increase the safety margin of the impeller resistance, reduce impeller deformation, and provide an improvement plan for the impeller structural design. The operation of industrial boiler fans in centrifugal wind turbine-based wind power generation systems is introduced, and the causes of overpressure in industrial boiler fans are analysed.