Journal
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
Volume 26, Issue 6, Pages 1542-1548Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jlp.2013.08.017
Keywords
Dust explosions; Explosion characteristics; Safety characteristics; Exploding wire; Fuse wire; Dust explosion testing
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Several safety characteristics of dusts are determined in the 20-L-sphere (also known as SIWEK Chamber) according to international standards. Dust cloud ignition is carried out using pyrotechnical igniters. Due to various disadvantages of such igniters the need for alternative ignition sources arises again and again. An alternative could be an ignition source which is known as exploding wire or fuse wire. The paper presents test results of a comparative study between both ignition sources for the determination of the safety characteristics Maximum Explosion Pressure and Maximum Rate of Explosion Pressure Rise of five selected dusts in the 20-L-sphere. In addition to that the ignition mechanisms of both ignition sources were analyzed by high speed camera recordings and the ignition energy was determined with electric and calorimetric recordings. The paper shows results of measurements of the ignition energy of both ignition sources as well as sequences of the flame propagation. (C) 2013 Elsevier Ltd. All rights reserved.
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