US 12,280,280 B2
Cooling type dry powder fire extinguishing agent and preparation method and application thereof
Xiutao Li, Tianjin (CN); and Xiaomeng Zhou, Tianjin (CN)
Assigned to Civil Aviation University of China, Tianjin (CN)
Filed by Civil Aviation University of China, Tianjin (CN)
Filed on May 24, 2024, as Appl. No. 18/674,469.
Claims priority of application No. 202310605248.X (CN), filed on May 26, 2023.
Prior Publication US 2024/0307726 A1, Sep. 19, 2024
Int. Cl. A62D 1/00 (2006.01); A62C 5/00 (2006.01)
CPC A62D 1/0014 (2013.01) [A62C 5/008 (2013.01)] 4 Claims
 
1. A preparation method of a cooling type dry powder fire extinguishing agent, comprising: taking compressed gas as a power source, pre-mixing an aqueous solution and a solid hydrophobic material at first by a premixer in proportion, then dispersing and mixing by a static mixer, and finally forming a cooling type dry powder fire extinguishing agent;
wherein a mass ratio of the aqueous solution and the solid hydrophobic material is 1:1 to 60:1;
the specific surface area of the solid hydrophobic material is 100-400 m2/g;
the premixer is one of a supersonic jet mixer and a Venturi jet mixer;
the static mixer is one or a combination of more of an SV type static mixer, an SK type static mixer, an SX type static mixer, an SZ type static mixer, an SY type static mixer, an SH type static mixer, an SL type static mixer and an SD type static mixer.