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AssigneesChina Petroleum & Chemical Corporation, China Petroleum & Chemical Corporation Qingdao Research Institute of Safety Engineering
InventorsShanjun Mu, Chunming Jiang, Weihua Zhang, Quanzhen Liu, Xuqing Lang, Xiaodong Mu, Lin Wang, Jingfeng Wu, Longmei Tan, Zuzheng Shang, Rifeng Zhou, Jianxiang Li, Hui Yu
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A foam production method includes mixing liquid nitrogen with a foaming material to produce foam. A gas is produced in situ from liquid nitrogen. As the ratio of the volume of the gas produced by gasification of liquid nitrogen to the volume of the liquid nitrogen is relatively high, when a large gas supply flow is needed to generate a large foam flow, a liquid nitrogen storage device of a small volume can be used instead of bulky air supply devices such as high-pressure gas cylinders, air compressors, air compressor sets and the like, reducing the volume of the air supply device. In addition, the liquid nitrogen used in foaming will release nitrogen gas after the foam blast, such that the nitrogen is also able to inhibit combustion on the surface of burning materials, accelerating the extinguishing of the fire.
A method for producing foam for fire extinguishing, comprising mixing a liquefied medium with a foam solution, and applying a disturbance to strengthen contact between the liquefied medium and the foam solution, wherein:
A method for producing foam for fire extinguishing, comprising mixing a liquefied medium, water, and a foam concentrate, and applying a disturbance to strengthen contact among the liquefied medium, the foam concentrate, and the water, wherein:
A method for producing foam for fire extinguishing, comprising mixing a liquefied medium, water, and a foam concentrate, and applying a disturbance to strengthen contact among the liquefied medium, the foam concentrate, and the water, wherein:
Dependencies are inferred from the claim text.