Nozzle design and finite element/dynamic analysis for reverse pulse-jet system of vertical dust collectors using ABS-PC material
Sathya Prasad, Pranav
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The main purpose of this thesis was to design and analyze a nozzle for reverse pulse-jet system of dust collectors using ABS-PC (Acrylonitrile butadiene styrene-Polycarbonate) material. Acrylonitrile Butadiene Styrene material is that of a thermoplastic polymer. ABS-PC have great sway obstruction with durability and unbending nature, superb appearance and processability, and metal coatings have superb attachment to ABS-PC. ABS-PC has a solid protection from destructive synthetic compounds as well as physical effects and is exceptionally simple to machine. It has a low softening temperature making it especially easy to use in 'infusion-forming-producing' procedures or '3D imprinting' on an FDM (Fused Deposition Modeling) machine. Reverse pulse-jet systems are used in dust collectors in order to clean the filter cartridges present in the dust collector cabinet. The pressure applied on the reverse pulse-jet system was 80 psi. For the time of cleaning, the pulsing takes place for a duration of approximately 0.1 seconds. There are various air-spray nozzle designs. The goal was to design a nozzle that meets the LS Industries® dust collector cartridge (DCC) filter requirements. The nozzle coverage was to be at least a length of 24 inches and diameter of 9 inches. The nozzle was designed using SolidWorksTM modeling software. The nozzle must have an inlet diameter of 1 5/16 inch, as that is a predefined requirement. The nozzle spray inclination or angle and spray coverage determine the airflow. The nozzle angle was kept at 66° in order to achieve the coverage. Finite element analysis (FEA) for the part shows how well the nozzle was able to withstand the 80-psi pressure. von Mises analysis, displacement, and strain readings were used to determine the integrity of the nozzle. von Mises analysis clearly shows that the maximum stress value was lesser than the tensile yield strength of the material, confirming that the part would not undergo failure. Further analysis was done using dynamic analysis. This validates how the nozzle would react to an 80-psi pressure in real time using 100 iterations. Subsequently, the nozzle was checked for an 85-psi pressure scenario to check how the nozzle was reacting to a higher pressure. Stress-FEA was used to determine how the nozzle was withholding an 85-psi pressure. The cost of the material was analyzed and cost per nozzle was calculated. This shows how much cost savings can be made with 3D printing process using ABS-PC material. The results prove the successful validation of the nozzle design towards withstanding the required pressure.
Thesis (M.S.)-- Wichita State University, College of Engineering, Dept. of Mechanical Engineering