Experimental study on microscopic evolving process of boiling overheat liquor in boiler under microcracking condition

Sining Chen; Xuechao He; Jinhua Sun

doi:10.1117/12.836780

10 July 2009 Experimental study on microscopic evolving process of boiling overheat liquor in boiler under microcracking condition

Sining Chen, Xuechao He, Jinhua Sun

Author Affiliations +

Proceedings Volume 7490, PIAGENG 2009: Intelligent Information, Control, and Communication Technology for Agricultural Engineering; 74902W (2009) https://doi.org/10.1117/12.836780
Event: International Conference on Photonics and Image in Agriculture Engineering (PIAGENG 2009), 2009, Zhangjiajie, China

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.

Citation Download Citation

Sining Chen, Xuechao He, and Jinhua Sun "Experimental study on microscopic evolving process of boiling overheat liquor in boiler under microcracking condition", Proc. SPIE 7490, PIAGENG 2009: Intelligent Information, Control, and Communication Technology for Agricultural Engineering, 74902W (10 July 2009); https://doi.org/10.1117/12.836780

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