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Proceedings Paper

Experimental study on microscopic evolving process of boiling overheat liquor in boiler under microcracking condition
Author(s): Sining Chen; Xuechao He; Jinhua Sun
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Paper Abstract

Boilers are frequently used in agricultural engineering. After micro cracks appear on the wall of the boiler for high pressure saturated liquor, the containing liquid will be overheated, rapidly boiled and expanded, which may result in explosion of the whole container. The evolving processes differ greatly by cracking conditions. In the experiment conducted in the this article, we made a small sized experimental device and applied high speed photography technology observing the simulated fierce boiling process of the high temperature and high pressure saturated water under overheat condition when micro cracking appears on boiler wall. According to our study, lower depressurization rate will suppress the boiling intensity of the overheated liquid and slow the growth of bubbles, decelerating the expansion of the two-phase flow compared with the boiling liquid expanding vapor explosion. The magnitude of overpressure in the container is also relatively smaller than overpressure in BLEVE.

Paper Details

Date Published: 11 July 2009
PDF: 8 pages
Proc. SPIE 7490, PIAGENG 2009: Intelligent Information, Control, and Communication Technology for Agricultural Engineering, 74902W (11 July 2009); doi: 10.1117/12.836780
Show Author Affiliations
Sining Chen, China Academy of Safety Sciences and Technology (China)
Xuechao He, Univ. of Science and Technology of China (China)
Jinhua Sun, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 7490:
PIAGENG 2009: Intelligent Information, Control, and Communication Technology for Agricultural Engineering
Honghua Tan; Qi Luo, Editor(s)

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