Analysis of Wall Sticking in Bypass Flue Gas Drying Tower for Desulfurization Wastewater of Coal-fired Power Plant
Wall sticking in bypass flue gas drying tower for desulfurization wastewater of coal-fired power plant is a common problem encountered during operation.This study discusses the review methods for parameters such as the volume of flue gas in the drying tower,tower diameter,tower height,and flow velocity of the flue gas distributor.It analyzes the causes of wall sticking in bypass flue gas drying towers from aspects of design,equipment,and operation,along with proposed measures to address them.Additionally,a method based on the principle of single variable control for troubleshooting wall sticking issues,ranging from low to high risk,is introduced.Taking a 300,000 kW unit's drying tower as an example,the parameters like the volume of flue gas,tower diameter,and tower height met the requirements.However,the flow velocity of the flue gas exiting the distributor was too low and exhibited excessive rotation,leading to droplets being carried to the tower walls by dusty hot flue gas before drying,resulting in wall sticking.By modifying the flue gas distributor to increase the outlet flow velocities of the inner and outer guide channels from 10.13 m/s and 19.66 m/s to 19.36 m/s and 23.85 m/s respectively,the issue of wall sticking in the drying tower was resolved.
bypass flue gas drying towerdesulfurization wastewaterzero emissionwall adhesionash blockage
万方数据
维普
