Design Of Pulse-Jet Filtering System

As main facilities for air pollution control, bag filters' performances are directly connected with the properties of filtered dusts. Bag filters used in wood industry have been borrowing running parameters from other industries for a long time. As scientific foundation is lacked, economy and high efficiency can hardly be guaranteed. This article presents a pulse-jet filter system designed to make available a convenient, reliable and flexible experiment platform for research on bag filter technologies in wood industry. Various experiments were made to test its reliability, and, with the analysis of wood dusts and filtering theory, to initially explore reasonable parameters of pulse-jet filtering of MDF dusts.The contents in detail are as the following:1, Design and production of a pulse-jet filter system for experimental use. The research on bag filtering in wood industry has long lacked a useful platform. This time, the design takes into account the characters of small pulse-jet filter. Several specific designs are made for the environment and intent it serves. And the testing experiments have demonstrated its competence.2, Accurate measurement of the size distribution of MDF sanding particles. With the aid of laser particle sizing analyzer, our research obtains the ability to measure the size of particles, especially the ratio and structure of super-micro particles with diameters under 10um.3, Initial exploration of reasonable parameters of pulse-jet filtering of MDF dusts. We respectively observed the affection of face velocity and dust concentration on collection efficiency, and face velocity, dust concentration and cleaning cycle on the resistance of the filter medium. Some final results are in line with our expectation while others show special characters, e.g. the affection of face velocity on collection efficiency is much weaker than expectation. Besides, the affection of cleaning cycle on filter resistance illustrates an interesting value-increasing range, which may be useful in industrial application.