主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

Fire Science and Technology ›› 2022, Vol. 41 ›› Issue (10): 1460-1463.

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Study on the single combustibility of main tree species in central Yunnan

Zhang Yunsheng1,2, Shu Lifu2, Zhai Chunjie1, Liu Kezhen1   

  1. (1. Nanjing Forest Police College, Jiangsu Nanjing 210023, China; 2. Institute of Forest Ecology, Environment and Nature Conservation, Chinese Academy of Forestry, Beijing 100091, China)
  • Online:2022-10-15 Published:2022-10-15

Abstract: Abstract: In order to study suppression effect of 4A zeolite on dust explosion of wheat starch, based on the optimum mass concentration of wheat starch, experiments of mixed dust explosion of wheat starch/4A zeolite were conducted by using closed Siwek 20-L sphere, and the variation law of pmax and (dp/dt)max of mixed dust with the increase of the mass of 4A zeolite was analyzed. The experimental results show that 4A zeolite can reduce the explosion intensity of wheat starch and inhibit the propagation of explosion flame.In 10 g of wheat starch, the addition of 4A zeolite can continuously reduce (dp/dt)max of wheat starch, and when its mass fraction is over 9.09%, it can greatly reduce pmax of wheat starch and mixed dust cannot explode. 4A zeolite can weaken dust explosion of wheat starch, and inhibit the propagation of explosion flame through physical and chemical suppression effect, including heat absorption, dilution and free radical adsorption.

Key words: Key words: dust explosion, wheat starch, 4A zeolite, inert powder, suppression effect