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Title Pneumatic Powder Conveying : Saltation Issues
Author Hjorth, Christian (Copenhagen University College of Engineering, IHK)
Petersen, Joakim (Copenhagen University College of Engineering, IHK)
Supervisor Bertelsen, Michael (Copenhagen University College of Engineering, IHK)
Institution Ingeniørhøjskolen i København, IHK, DK-2750 Ballerup, Denmark
Thesis level Bachelor thesis
Education Diplomingeniør, Maskiningeniør
Education Bachelor of Mechanical Engineering
Publication date 2013-01
Abstract This report is a Bachelor Project in mechanical engineering at the 7th semester and regards the subject pneumatic powder conveying and issues of saltation of the conveyed powder (down-flowing flow after bend). The project is done in collaboration with NNE Pharmaplan A/S. Today pneumatic conveying is used in many industries and is a continuous conveying method. The report is dealing with analysis of two methods (Martin Rhodes and Nomographs) of calculating the system pressure loss. A method based on experiments performed by Flotronics Div., Allied Industries, Inc. and Martin Rhodes, which is a more detailed and theoretical method of calculating pressure loss in pneumatic conveying systems. Comparisons between the methods are performed to see, what the cost effect of the system is by taking purchase cost of the blower unit, operational cost of the blower unit and the requirement of cooling the system.

Saltation of powder is an issue in pneumatic conveying and is investigated in this report by performing test on a pilot system. By testing the system to its limits important data was collected and used as boundary conditions to Simulations done in both SolidWorks Flow Simulation and COMSOL Multiphysics Fluid Flow module. Solutions to solve the issue is thoroughly processed and manufactured for testing the problematic with saltation on the pilot system.

Installing the solution to the pilot system requires cutting out a section of the hose to put in the solution. The solution is based on the Venturi principles, which will reaccelerate the slow moving particles from saltation. It is very difficult to say if this solution solves the problem with saltation, because the cut out of the hose sections leaves unfavorable joints. The joints causes drift formation to initiate and are a problem to the solutions real effect on solving the issue.
Pages 103
External partner Ledere og medarbejdere i private virksomheder
Admin Creation date: 2013-01-12    Update date: 2013-04-18    Source: ihk    ID: ihk-13043630    Original MXD