Performance on pulse-jet dust cleaning of corrugated pleated filter bags
The corrugated pleated filter bag is a common filtering device with uneven distribution of static pressure and unclear pulse cleaning performance.An 8-pleat,7-metre-long corrugated pleated filter bag was selected to investigate the effect of bag corrugation on cleaning performance.Firstly,physical tests were conducted to examine the peak pressure distribution along different cross-sections of the filter bag's wall surface in the length direction.Subsequently,the reliability and accuracy of the numerical simulation analysis method were verified.Based on this,model optimization and orthogonal tests were performed to analyze the effects of various factors on the cleaning performance.Results show that,under varying injection pressure and distance,with a nozzle diameter of 22 mm and an injection time of 100 ms,the peak pressure distribution along the bag's length follows a similar trend to that of cylindrical filter bags.The filter bag has no obvious deformation at a distance of 1-7 m from the bag mouth.The relative deviation of the pressure at peak,middle,and trough of the same section was within±10％.Comparing the numerical calculation results of the optimized three-dimensional and two-dimensional axisymmetric models with the test results,it is demonstrated that the equal flow area method is reasonable and feasible for analyzing the ash cleaning performance based on the comparison of peak pressure at the wall and induced airflow.Finally,the orthogonal test indicates that injection pressure has the greatest influence,followed by bag length,injection distance,pleat number,and injection time,in that order.The optimal pleat range is found to be between 6 and 12,with an increasing pleat number leading to a decrease in peak pressure.These research findings can serve as a reference for designing injection parameters and optimizing the structure of corrugated pleated filter bags.
safety and hygiene engineering technologycorrugated pleated filter bagphysical modeling testnumerical simulationorthogonal testwall peak pressure of filter bag
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维普
