Structure Optimization and Flame Barrier Performance Evaluation of Barrier Explosion‐Proof Materials Based on FLACS

Abstract

Blocking explosion-proof materials can quickly transfer heat, block flame propagation, and prevent explosion accidents. It has gradually become a rudimentary solution to the intrinsic safety of explosion or "secondary explosion" during the storage and transportation of flammable and explosive liquid or gaseous dangerous chemicals. The impact of the addition of explosion-proof porous materials in the storage tank on the shock wave was numerically simulated by FLACS and further analyzed with changes in pressure, temperature, and velocity. The effects of the configuration, size, aperture, layer spacing, and filling rate of the barrier explosion-proof ball on the barrier explosion-proof effect were investigated whereby the optimal barrier explosion-proof appearance structure was obtained. The explosion resistance tester was used to examine and evaluate the fire resistance performance of the material, and the influence of different types of barrier explosion-proof pellets on the fire resistance performance was revealed. The explosion suppression performance of the barrier explosion-proof material was evaluated by FLACS numerical simulation. The temperature and pressure in the storage tank can be greatly scaled down by adding the explosion-proof porous material. The numerical simulation results are coherent with that from experimental part, and the general rule of blocking explosion protection can be therefore identified: the turbulence effect is particularly obvious in the area filled with explosion-proof materials, and the porous spheres would continually reflect and weaken the shock wave. This makes it possible to significantly bring down the pressure and temperature after filling the explosion-proof area, thereby preventing explosions.[a] Dr. Figure 14. Flame blocking effect of different configurations of barrier explosion-proof materials. (a) Three-dimensional hollow structure fire resistance process: the time difference from the beginning to the extinction is 2440 ms, and the contact to the extinction time is 1.04 s; (b) The fire resistance process of a layer of perforated plate splicing configuration: the time difference from the beginning to the extinction is 2560 ms, and the contact to the extinction time is 1.32 s; (c) Multilayer orifice plate splicing configuration fire-blocking process: the time difference from the beginning to the extinction is 1720 ms, and the contact to the extinction time is 0.88 s. ChemistrySelectFull Papers

Experimental Research on Rapid Fire Zone Sealing and Explosion Venting Characteristics of an Explosion Venting Door Using a Large-Diameter Explosion Pipeline

“…The explosion venting experiment was carried out with an independently built experimental system. The experimental system was divided into four parts as shown in Figure 1: (1) large-diameter explosion pipeline experimental system [5 and 8]; (2) high-performance data acquisition system [1, 3, 4, and 6]; (3) explosion venting door [2]; and (4) ignition control system [7]. 2.1.…”

“…At present, the existing explosion-proof devices in coal mines mainly include rock powder sheds, explosion-proof walls, explosion-proof water curtains, explosion-proof doors, and fire doors. − For this reason, scholars have actively studied these technologies. Liu et al installed explosion venting doors of different qualities in the transparent glass cavity and found that the greater the quality of the explosion venting door, the longer it took to open the explosion venting door .…”