Numerical and experimental study on separation efficiency of steam separators

To improve the separation efficiency of steam and gas in power plant a new type steam separator is presented. A mathematical model is established for simulating the flow field of gas flow channels in steam separator. The gas-water separating efficiency is calculated for the droplets at different particle diameter. The equations are solved by using computational fluid dynamics (CFD) method. Fibreglass filtering method is used for measuring the Separation efficiency of steam separator. The results show that structure parameters and inlet gas velocity have great influence on the separation efficiency of wave type plate separator. The separation efficiency of steam separator with hooks is higher than that without it. Plate spacing and length offer the largest opportunity to the performance improvement. The droplets removal efficiency increases with the plate spacing reduction. The turning angle must be less than 54° for a high efficiency and low pressure loss. The gas velocity within the separator should be kept below a critical velocity as well in order to avoid re-entrainment. Separation efficiency of steam separator is high when moisture content of inlet gas is less than 30 g/m³. Numerical and experimental method can predict separation efficiency of steam separator for the removal of droplets from gas. It can be directly used for the design of steam separator.