US 11,980,785 B2
Foam producing method, fire extinguishing method, and appliance for foam extinguishing
Shanjun Mu, Qingdao (CN); Chunming Jiang, Qingdao (CN); Weihua Zhang, Qingdao (CN); Quanzhen Liu, Qingdao (CN); Xuqing Lang, Qingdao (CN); Xiaodong Mu, Qingdao (CN); Lin Wang, Qingdao (CN); Jingfeng Wu, Qingdao (CN); Longmei Tan, Qingdao (CN); Zuzheng Shang, Qingdao (CN); Rifeng Zhou, Qingdao (CN); Jianxiang Li, Qingdao (CN); and Hui Yu, Qingdao (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and CHINA PETROLEUM & CHEMICAL CORPORATION QINGDAO RESEARCH INSTITUTE OF SAFETY ENGINEERING, Qingdao (CN)
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and CHINA PETROLEUM & CHEMICAL CORPORATION QINGDAO RESEARCH INSTITUTE OF SAFETY ENGINEERING, Qingdao (CN)
Filed on Jan. 19, 2023, as Appl. No. 18/156,435.
Application 18/156,435 is a division of application No. 16/490,728, granted, now 11,559,711, issued on Jan. 24, 2023, previously published as PCT/CN2018/077196, filed on Feb. 26, 2018.
Claims priority of application No. 201710116928.X (CN), filed on Mar. 1, 2017; application No. 201710116929.4 (CN), filed on Mar. 1, 2017; application No. 201710117015.X (CN), filed on Mar. 1, 2017; application No. 201710117707.4 (CN), filed on Mar. 1, 2017; application No. 201710119860.0 (CN), filed on Mar. 1, 2017; application No. 201710645358.3 (CN), filed on Aug. 1, 2017; application No. 201710645441.0 (CN), filed on Aug. 1, 2017; application No. 201710645486.8 (CN), filed on Aug. 1, 2017; application No. 201710645620.4 (CN), filed on Aug. 1, 2017; application No. 201710645701.4 (CN), filed on Aug. 1, 2017; application No. 201710645950.3 (CN), filed on Aug. 1, 2017; and application No. 201710646122.1 (CN), filed on Aug. 1, 2017.
Prior Publication US 2023/0149753 A1, May 18, 2023
Int. Cl. B01F 23/00 (2022.01); A62C 5/02 (2006.01); B01F 23/235 (2022.01); B01F 25/31 (2022.01); B01F 25/313 (2022.01); B01F 27/112 (2022.01); A62C 3/06 (2006.01)
CPC A62C 5/02 (2013.01) [B01F 23/235 (2022.01); B01F 25/31112 (2022.01); B01F 25/31113 (2022.01); B01F 25/3131 (2022.01); B01F 27/112 (2022.01); A62C 3/065 (2013.01); B01F 2215/0422 (2013.01); B01F 2215/0427 (2013.01); B01F 2215/0431 (2013.01); B01F 2215/045 (2013.01); B01F 2215/0468 (2013.01); B01F 2215/0472 (2013.01)] 9 Claims
OG exemplary drawing
 
1. 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:
(i) the mixing is carried out in a mixing device, and the applying a disturbance includes arranging a disturbing component;
(ii) the liquefied medium is liquid nitrogen, and a flow of the liquid nitrogen and a flow of the foam solution meet the following equation: Q=mV/nf, wherein Q is a volumetric flow of the liquid nitrogen, m is a preset foaming ratio in a range of 5-200, V is a volumetric flow of the foam solution, n is a volumetric expansion ratio of the liquid nitrogen, and f is a pipeline loss factor in a range of 1-1.4; or
(iii) the mixing is performed under conditions including: mixing temperature in a range of −30° C˜60° C., pressure of the liquefied medium in a range of 1-2 MPa, and pressure of the foam solution in a range of 0.8-1.5 Mpa.