摘要: Water curtain could dilute leaking poisonous gas or obstruct the diffusion of the poisonous gas to the sensitivity regions safely, efficiently and quickly. So it was very important to understand diffusion mechanism of the heavy ga... 展开 Water curtain could dilute leaking poisonous gas or obstruct the diffusion of the poisonous gas to the sensitivity regions safely, efficiently and quickly. So it was very important to understand diffusion mechanism of the heavy gas diluted by water curtain and explore pattern of the effect of water curtain's setting parameter on the diffusion capacity of heavy gas diluted with water curtain. In this paper, experiments of fan water curtain and cone water curtain diluting CO_2 in open space were done. According to experiment results, dilution mechanism of fan water curtain and cone water curtain were obtained. The protective screen formed by fan water curtain could obstruct heavy gas diffusion effectively, and fan water curtain could also disperse heavy gas upwards through the mechanical effect. Cone water curtain would atomize the water and mix the heavy gas and air intensively with the help of air entrainment to dilute the heavy gas clouds. On this basis, it was concluded that when water curtain was opened before heavy gas passed through water curtain and the cone water curtain was installed in front of the fan water curtain, dilution effect was better. When water curtain was opened after heavy gas passed through water curtain and the fan water curtain was installed in front of the cone water curtain, dilution effect was better. 收起