Lysine is an essential amino acid for human body, and lysine sulfates are at risk of fire and explosion during the production and processing. However, there is no public report on the lysine sulfate powder explosion hazard research. In this paper, the effects of moisture, mass concentration and particle size on the flame propagation behaviors of L-lysine sulfate powder were studied in a vertical pipe. The results showed that the flame propagation could be divided into 3 stages: free propagation, acceleration and attenuation, in which the acceleration was owed to the positive feedback of combustion reaction, gas expansion and turbulence. Moisture content could promote the flame propagation of L-lysine sulfate powder to a certain extent, but it had a strong inhibitory effect on the explosion when the moisture content was too large. The flame propagation velocity increased with the decrease of the average particle size of powder,.With the increase of the particle concentration, the flame propagation velocity of powder explosion increased first and then decreased, that was, there was an optimal concentration of powder explosion, and the powder was more sensitive to the change of concentration in the range of low concentration.

赖氨酸是人体必需的氨基酸，赖氨酸硫酸盐在生产和加工过程中有燃烧和爆炸的危险。但是，尚无关于赖氨酸硫酸盐粉爆炸危险性研究的公开报道。本文研究了水分，质量浓度和粒径对L-赖氨酸硫酸盐粉末在垂直管中火焰传播行为的影响。结果表明，火焰的传播可分为自由传播​​，加速和衰减三个阶段，其中加速是燃烧反应，气体膨胀和湍流的正反馈。水分可以在一定程度上促进L-赖氨酸硫酸盐粉末的火焰蔓延，但是当水分过多时，对爆炸具有很强的抑制作用。