Method for addition of fire suppression additive to base foam solutions

Patent metadata

Field	Value
Publication number	US-11724142-B2
Application number	US-202117336737-A
Country	US
Kind code	B2
Filing date	Jun 2, 2021
Priority date	Jan 8, 2019
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A method of proportioning a finished foam at or near a hazard comprising proportioning and delivering a first finished foam to the hazard, determining if the first finished foam extinguishes or suppresses the hazard, if not, selecting an amount of a fluorinated additive, and proportioning a foam solution including the selected amount of the fluorinated additive to form a fluorinated finished foam. A foam injection system is also disclosed.

First claim

What is claimed is:

1. A method of proportioning a finished foam, the method comprising:
a) foaming a stream of a first foam solution to form a first finished foam, and delivering the first finished foam on a hazard;
b) selecting an amount of an additional fire suppression additive; and
c) adding the selected amount of the additional fire suppression additive to the stream of the first foam solution to form a modified foam solution stream.

2. The method of claim 1 further comprising:
d) foaming the modified foam solution stream to form a modified finished foam and delivering the modified finished foam on the hazard;
e) selecting an increased amount of the additional fire suppression additive based on a type of hazard; and
f) adding the increased amount of the additional fire suppression additive to the stream of the first foam solution to form a second modified finished foam.

3. A method of forming a fire fighting foam comprising:
a) diluting a base foam concentrate with a stream of dilution water to provide a first foam solution stream; and foaming the first foam solution stream to provide a first finished foam;
b) modifying the first foam solution stream to include a selected amount of an additional fire suppression additive to form a second foam solution stream; and
c) foaming the second foam solution stream to form a second finished foam.

4. The method of claim 3 , wherein
a) foaming the first foam solution stream to provide the first finished foam comprises mixing the first foam solution stream with air through a nozzle fluidly connected to an outlet to form the first finished foam;
b) modifying the first foam solution stream to include the selected amount of the additional fire suppression additive to form the second foam solution stream comprises:
designating a Class B hazard profile for a hazard and selecting the amount of the fire suppression additive based on the Class B hazard profile; and
mixing the selected amount of the additional fire suppression additive with the first foam solution stream in a foam proportioning system to form the second foam solution stream; and
c) foaming the second foam solution stream to form the second finished foam comprises mixing the second foam solution stream and air through the nozzle to form the second finished foam.

5. The method of claim 4 further comprising:
d) delivering the second finished foam on the hazard;
e) determining if the second finished foam extinguishes or suppresses the hazard;
f) if not, selecting an increased amount of the additional fire suppression additive based on a type of the hazard;
g) modifying the first foam solution stream to include the increased amount of the additional fire suppression additive to form a second foam solution stream; and
h) foaming the second foam solution stream in the foam proportioning system to form a third finished foam.

Assignees

• Tyco Fire Products Lp

Inventors

• Lavergne Eric
• Morrison John D
• Libal John P
• Gaspard Brent
• Staszak Adam

Classifications

• A62D1/0085 Primary

  containing perfluoroalkyl-terminated surfactant · CPC title

• A62C5/02 Primary

  of foam · CPC title

• A62C31/12

  for delivering foam or atomised foam · CPC title

• A62D1/0071

  Foams · CPC title