In order to avoid catalysts toxicity during selective catalytic reduction(SCR)process and reduce blockage of honeycomb catalysts

groove inertial separators were installed in the horizontal flue duct of the2×350 MW unit boiler in Harbin Pingnan Thermal Power Plant.The computational fluid dynamics method was used to numerically simulate the two phase flow in the groove inertial separators and investigate the separation performance.Moreover

the effects of lengthwise row number

particle size and flue gas velocity on performance of the groove inertial separator were discussed.Combing with the actual operation data of a typical supercritical 350 MW coal-fired unit

the fly ash content in the top catalyst layer

the highest flue gas velocity and gas uniformity in the duct after the groove inertial separator were analyzed.The results show that

after entering the groove inertial separator

the fly ash subjects small disturbance form the stream and is easy to be captured.It could be conclude that the most important structural parameters of the separator include aspect ratio and pitch

and the optimal lengthwise dimension pith is proposed.The optimal parameters of the separator are:the ratio of depth to width is 0.5

the transverse relative pitch is 2.5

thelengthwise relative pitch is 2.5

the longitudinal row number is 3.With these structural parameters

the separation efficiency can reach up to 55.285% when the pressure loss is 360.21 Pa.