The Mechanical Performance Of The Wave-plate Mist Eliminator

Wire mesh mist eliminator，cyclone mist eliminator, electric mist eliminator andwave-plate mist eliminator are common gas-liquid separation device. Among all ofthese mist eliminators, wave-plate mist eliminator is widely used in process industriesdue to varied material, size and structure; it is high efficiency, energy saving and goodmechanical stability. This kind of mist eliminator can be suitable for high gas velocity,high liquid loading, various kinds of viscous liquid and conventional design. Themechanical property of the wave-plate mist eliminator is the fundamental to safe,stable and long period operation of the equipment. Whereas, there are little literaturesto study or report the mechanical performance of wave-plate mist eliminator. It isnecessary to develop a new research method to achieve the mechanical performanceof wave-plate mist eliminator.The widely used wave-plate mist eliminators usually suffer from failures such ascollapse and fracture, these problems tend to reduce the separation efficiency of theequipment and jeopardize the whole technological process. In present investigation,the Mechanical and CFX parts of the finite element analysis software ANSYS wereemployed to study the mechanical performance of the wave-plate mist eliminator bythe method of Fluid-Structure Interactions (FSI) numerical simulation, and thecorresponding experiments were also conducted to verify the reliability of thenumerical simulation results. The results indicated that the maximum relative error ofsimulation results and experimental results is12%, and the average relative error is4%. Maximum stress of the FSI results is located in constraint position, which is alsothe main failure position in engineering practice. In order to investigate the effects ofnine parameters, namely, bend number, spacing, bend angle, and inlet air velocity,constraint diameter, plate height, plate width, plate length and plate thickness, onmechanical performance of wave-plate mist eliminator, Maximum stress in constraintplace m a x, maximum stress in first bend place m a x1, and maximum deflectionwto ta lwere chosen as control index to study the influence rules. The results shows that withthe increase of the bend number, spacing, inlet air velocity and plate length, the,and will increase. With the increase of the bend angle, plate height, platewidth and plate thickness, the, and will decrease. With the increase ofthe constraint diameter, the, and decrease firstly, and then increase. Four parameters which were bend number, spacing, bend angle, and inlet velocityinfluenced to m a x, m a x1andw to ta llaw was studied in L9(34) orthogonal table. Theresults show that these four parameters influence to from strong to the weak inorder as: bend angle> air velocity> bend number> spacing, from strong to theweak in order as: bend angle> bend number> air velocity>spacing, and fromstrong to the weak in order as: air velocity> bend angle> spacing> bend number.Orthogonal analysis gives the optimal parameters: bend angle120°, spacing10mm,bend number1, inlet velocity3m/s. when constraint diameter is20mm, plate heightis80mm, plate width is60mm, the wave-plate mechanical performance is optimal.4m plate length and2mm plate thickness were recommended to mist eliminator. Inorder to achieve high efficiency, low pressure drop, good mechanical performance ofwave-plate mist eliminator, excessive arc was used to optimize two different series ofwave-plate mist eliminator structure.This paper makes the first attempt at FSI numerical simulation for wave-platemist eliminator mechanical performance studying. The results will provide thereference to wave-plate mist eliminator mechanical performance FSI numericalsimulation studying, and results have an important significance on guide ofwave-plate mist eliminator mechanical structure analysis and the industrial design.