CFD Analysis for Layout Optimization of Flue Gas Ducting Between Air Preheater and Electrostatic Precipitator

  Jeanaustin S

Sudden change in the flow direction are quite common in layout of flue gas ducting between air preheater and electrostatic precipitator. The most economical solution of optimization of ducting problem reduces the pressure drop in the duct and enables higher flow at reduced pressure drop and is achieved by inclusion of guide vanes and guide plates. The flue gas in Air preheater (APH) to Electrostatic precipitator (ESP) duct causes higher pressure drop, flow mal-distribution among ESP passes, turbulence, erosion leakages and reverse flow in bends, connecting and branched outlet ducts. It carries ash particles which under operating conditions hit the duct walls and can cause erosion of guide vanes or duct walls. The turbulence caused due to sharp turns and sudden changes in the duct geometry results in noise and vibration. The pressure drop occurs due to reverse flow of flue gas in a duct. In order to reduce the problems, different approaches like shape changing, Area reduction, Application of guide vanes and guide plates has done using CFD software. The pressure and velocity readings are taken for before and after modifications cases and comparison are done. The optimized iterations is found out by guide plates angle variation using increasing or decreasing of corresponding guide plate according to the deviation of ESP stream flow from the desired average value.

Keywords- CFD, Flue gas, Ducting, Pressure drop, Velocity

Unique Identification Number - IJEDR1803080
Page Number(s) - 465-480
Pubished in - Volume 6 | Issue 3 | August 2018
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Jeanaustin S,   "CFD Analysis for Layout Optimization of Flue Gas Ducting Between Air Preheater and Electrostatic Precipitator", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.6, Issue 3, pp.465-480, August 2018, Available at :http://www.ijedr.org/papers/IJEDR1803080.pdf