Experimental study on rapid sealing and venting characteristics of explosion venting door under different conditions

doi:10.16265/j.cnki.issn1003-3033.2020.06.014

Abstract

Abstract: In order to study influence of explosion venting door on characteristic parameters of gas explosion, and verify its venting effect and fast sealing performance, gas explosion tests were carried out by using self-made large explosion pipeline system for conditions of 5.5%, 7.5%, 9.5% and 11.5% gas concentration. Then, explosion parameters were measured by data acquisition system, and their change laws and flameproof effect were analyzed. The results show that pressure peak are attenuated by 42.25%, 50.54%, 53.27% and 52.88% respectively under four working conditions. Along with increase of gas concentration, explosion pressure peak decays as a quadratic function, and average enclosed fire zone is 14 h, indicating that explosion venting door has significant venting characteristics and can close fire zone rapidly. Temperature change law is basically same, and in spite of gas concentration changes, explosion venting door does not inhibit gas explosion flame. Under four operating conditions, the maximum average value of flame propagation speed are 103.56, 105.73, 136.67 and 138.34 m/s separately.

Key words: explosion venting door, gas explosion, large-diameter pipeline, rapid sealing, peak pressure

CLC Number:

X932

LI Ang, SI Junhong, ZHAO Xidong, ZHOU Xihua. Experimental study on rapid sealing and venting characteristics of explosion venting door under different conditions[J]. China Safety Science Journal, 2020, 30(6): 92-97.

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