Experimental study on detonation propagation in industrial scale pipelines  used in petrochemical plants

BAO Lei; WANG Peng,; DANG Qian; LI Houda; KUANG Chen; YU Anfeng

doi:10.11883/bzycj-2020-0295

Volume 41 Issue 9

Sep. 2021

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BAO Lei, WANG Peng,, DANG Qian, LI Houda, KUANG Chen, YU Anfeng. Experimental study on detonation propagation in industrial scale pipelines used in petrochemical plants[J]. Explosion And Shock Waves, 2021, 41(9): 095401. doi: 10.11883/bzycj-2020-0295

Citation:

BAO Lei, WANG Peng,, DANG Qian, LI Houda, KUANG Chen, YU Anfeng. Experimental study on detonation propagation in industrial scale pipelines used in petrochemical plants[J]. Explosion And Shock Waves, 2021, 41(9): 095401. doi: 10.11883/bzycj-2020-0295

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Experimental study on detonation propagation in industrial scale pipelines used in petrochemical plants

doi: 10.11883/bzycj-2020-0295

BAO Lei^{1, 2
,},
WANG Peng,^{1, 2},
DANG Qian³,
LI Houda^{1, 2},
KUANG Chen^{1, 2},
YU Anfeng^{1, 2
,
,}

1.
Research Institute of Safety Engineering, SINOPEC, Qingdao 266101, Shandong, China
2.
State Key Laboratory of Safety and Control for Chemicals, SINOPEC, Qingdao 266101, Shandong, China
3.
Petroleum Engineering School, Southwest Petroleum University, Chengdu 610500, Sichuan, China

Received Date: 2020-08-28
Rev Recd Date: 2020-12-24

Available Online: 2021-08-23

Publish Date: 2021-09-14

Abstract

Abstract

Based on the lack of systematic research on flame propagation in large-diameter and long-distance pipelines in the tank area of petrochemical plants, an experimental device for flame propagation in DN50-DN500 industrial-scale pipelines was designed and built. In this paper, effects of concentration of gas mixture for propagation characteristics of steady gaseous detonation waves in ethylene-air mixtures with DN50 pipeline were studied experimentally. The volume concentration of gas mixture was 5.6%, 5.93%, 6.6%, 7.15%, 8.0% ethylene in air. Homogeneous C₂H₄/air (6.6%) and C₃H₈/air (4.2%) mixtures were used with 9 kinds of pipelines which were from DN50 to DN500 to study the effects of pipeline diameter for propagation characteristics of steady gaseous detonation. The experimental results show that the concentration of combustible gas has an effect on flame propagation and detonation. The detonation runup distance is short and steady detonation is more likely to be formed when it is close to chemical equivalent concentration, when the combustible mixture is poorer or richer, the steady detonation will need more runup distance. The detonation flame speed and pressure are more affected by the type of combustible gas instead of pipe diameter. The detonation pressure of the mixture of 6.6% C₂H₄/air and the mixture of 4.2% C₃H₈/air is 15.17 and 14.47 times of the initial pressure, respectively, which is different from the reference value given by the ISO16852 standard where the ratio p_m/p₀ (the average value of the detonation pressure to initial pressure) increases with pipe diameter. The detonation pressure of pipeline below DN150 is far higher than the reference value which is 10 and 12. It’s suggested that in the design of pipelines and selection and installation of flame arresters for connecting pipelines in the tank areas, detonation pressure requires careful consideration and appropriate arresters should be selected in combination with the installation position.
- gaseous detonation,
- flame propagation,
- industrial scale,
- pipeline

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References(17)

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