Method for extinguishing fire

Abstract

A new method for extinguishing fire is provided, characterized in that a pyrotechnic agent is used as a heat source (energy) and a power source (driving gas); during use, the pyrotechnic agent is ignited, and the high temperature generated by the combustion of the pyrotechnic agent is utilized to make a fire extinguishing composition produce a large amount of fire extinguishing substance, which is sprayed out together with the pyrotechnic agent, so as to achieve the purpose of extinguishing a fire. As compared with conventional aerosol fire extinguishing systems, gas fire extinguishing systems and water-based fire extinguishing systems, the fire extinguishing method of the present invention is more efficient and safer.

Claims

1. A method for extinguishing fire, the method comprising: providing a fire extinguisher having a nozzle for spraying out a fire extinguishing substance, a pyrotechnic agent and a fire extinguishing composition contained in the fire extinguisher, the fire extinguishing composition being disposed between the nozzle and the pyrotechnic agent within the fire extinguisher; using the pyrotechnic agent as a heat source and a power source; igniting, during use, the pyrotechnic agent to generate a high temperature gas; and allowing the high temperature gas generated by combustion of the pyrotechnic agent to flow through the fire extinguishing composition to cause the fire extinguishing composition to generate a large amount of the fire extinguishing substance, which is sprayed out together with the pyrotechnic agent through the nozzle, so as to achieve a purpose of extinguishing a fire, wherein the fire extinguishing composition includes 40 mass % of zinc carbonate, 50 mass % of potassium carbonate, and 10 mass % of microcrystalline paraffin wax.

2. A method for extinguishing fire, the method comprising: providing a fire extinguisher having a nozzle for spraying out a fire extinguishing substance, a pyrotechnic agent and a fire extinguishing composition contained in the fire extinguisher, the fire extinguishing composition being disposed between the nozzle and the pyrotechnic agent within the fire extinguisher; using the pyrotechnic agent as a heat source and a power source; igniting, during use, the pyrotechnic agent to generate a high temperature gas; and allowing the high temperature gas generated by combustion of the pyrotechnic agent to flow through the fire extinguishing composition to cause the fire extinguishing composition to generate a large amount of the fire extinguishing substance, which is sprayed out together with the pyrotechnic agent through the nozzle, so as to achieve a purpose of extinguishing a fire, wherein the fire extinguishing composition includes 10 mass % of potassium nitrate, 15 mass % of phenolic resin, 55 mass % of sodium chloride, 15 mass % of hydroxyl-terminated polybutadiene, and 5 mass % of toluene diisocyanate.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a flowchart illustrating a method for extinguishing fire according to an embodiment of the present application.

DESCRIPTION OF EMBODIMENTS

Example 1

(2) 40 mass % of zinc carbonate, 50 mass % of potassium carbonate and 10 mass % of microcrystalline paraffin wax are uniformly mixed. The mixture is made into pellets by a tabletting machine. Inside a fire extinguisher, a certain amount of said pellets are placed between the nozzle and a pyrotechnic agent, to form a simple and new type of fire extinguisher (Step S1 in FIG. 1).

(3) The pyrotechnic agent is ignited (Steps S2 and S3 in FIG. 1), and the heat thus generated makes zinc carbonate decompose into zinc oxide and carbon dioxide that can extinguish fire. Gases generated during the combustion of the aerosol generator spray out the decomposition products through the nozzle (Step S4 in FIG. 1). The concentration-distribution fire-extinguishing test result is shown in Table 1.

Example 2

(4) A certain amount of iodine are placed between the nozzle of the fire extinguisher and the pyrotechnic agent, to form a simple and new type of fire extinguisher.

(5) The pyrotechnic agent is ignited, and the heat thus generated makes the iodine sublimate. Gases generated during the combustion of the aerosol generator spray out the sublimated substance. The concentration-distribution fire-extinguishing test result is shown in Table 1.

Example 3

(6) 10 mass % of potassium nitrate, 15 mass % of phenolic resin, 55 mass % of sodium chloride, 15 mass % of hydroxyl-terminated polybutadiene, 5 mass % of toluene diisocyanate are uniformly mixed. The mixture is poured to form prism honeycomb that is cured and processed into a bulk honeycomb. A certain amount of said bulk agent is placed between the nozzle of the fire extinguisher and the pyrotechnic agent, to form a simple and new type of fire extinguisher.

(7) The pyrotechnic agent is ignited, and the heat thus generated makes potassium nitrate react with phenolic resin, hydroxyl-terminated polybutadiene and toluene diisocyanate, to generate substances such as carbon dioxide, nitrogen, potassium carbonate particles that can extinguish fire, etc. Gases generated during the combustion of the aerosol generator spray out the generated products. The concentration-distribution fire-extinguishing test result is shown in Table 1, Table 2 and Table 3.

(8) TABLE-US-00001 TABLE 1 Assembly method and fire-extinguishing effects of the simple and new type of fire extinguishers (Using an S-type aerosol generator as the power source and heat source)** Type/mass Type/mass (g) of Average Highest (g) of fire-extinguishing fire- temperature pyrotechnic chemical extinguishing at nozzle agent substance number* ( C.) Remarks Commercially 1.2 1250 Com- available parative S-type test aerosol generator/50 Commercially Fire-extinguishing 2.2 610 available compostion in S-type Example 1/50 aerosol generator/50 Commercially Fire-extinguishing 3.6 465 available elementary S-type substance in aerosol Example 2/50 generator/50 Commercially Fire-extinguishing 2.8 830 available compostion in S-type Example 3/50 aerosol generator/50 *average value of five parallel tests

(9) TABLE-US-00002 TABLE 2 Assembly method and fire-extinguishing effects of the simple and new type of fire extinguishers (Using a K-type aerosol generator as the power source and heat source)** Type/mass Type/mass (g) of Average Highest (g) of fire-extinguishing fire- temperature pyrotechnic chemical extinguishing at nozzle agent substance number* ( C.) Remarks Commercially 2.6 790 Com- available parative S-type test aerosol generator/15 Commercially Fire-extinguishing 4.2 430 available compostion in K-type Example 1/50 aerosol generator/15 Commercially Fire-extinguishing 4.8 355 available elementary K-type substance in aerosol Example 2/50 generator/15 Commercially Fire-extinguishing 4.4 640 available compostion in K-type Example 3/50 aerosol generator/15 *average value of five parellel tests

(10) TABLE-US-00003 TABLE 3 Assembly method and fire-extinguishing effects of the simple and new type of fire extinguishers (Using an aerosol generator as the power source and heat source)** Type/mass Type/mass (a) of Average Highest (g) of fire-extinguishing fire- temperature pyrotechnic chemical extinguishing at nozzle agent substance number* ( C.) Remarks Commercially 0 960 Com- available parative pyrotechnic test agent/100 Commercially Fire-extinguishing 1.8 520 available compostion in K-type Example 1/50 aerosol generator/100 Commercially Fire-extinguishing 3.0 395 available elementary K-type substance in aerosol Example 2/50 generator/100 Commercially Fire-extinguishing 2.2 690 available compostion in K-type Example 3/50 aerosol generator/100 *average value of five parellel tests **Fire extinguishing model

(11) A test model is made with reference to 7.13 Concentration-distribution test of Part 1Thermal aerosol fire extinguishing device of the Aerosol Fire Extinguishing System (GA499.1-2004), and a test process according to this is adopted.

(12) The test chamber is a cube having an inner side length of 1 m. With reference to the front door of the test chamber, one fuel tank having an inner diameter of 30 mm and a height of 100 mm is placed at each of the upper left front part, the upper right rear part, the lower left rear part, the lower right front part, and the back of baffle in the test chamber. The fuel used is n-heptane. Ignite n-heptane, allow it to pre-burn for 30 seconds, close the door of the test chamber, and start a simple and new type fire extinguisher to extinguish fire.

(13) Open the test chamber 30 seconds later after the completion of the ejection of the fire extinguisher. Calculate an average fire-extinguishing number based on the fire-extinguishing number of five parallel tests.