Aqueous fire extinguishing agent and preparation method thereof

Abstract

An aqueous fire extinguishing agent and a preparation method thereof are provided, which are used for making a throw-type fire extinguisher. The aqueous fire extinguishing agent is composed of two compositions of A and B. The composition A is a fortified water added with a flame retardant (e.g., one or more of ammonium chloride, diammonium hydrogen phosphate and ammonium polyphosphate), a wetting agent (e.g., alkyl polyglycoside) and a colloid (e.g., polyacrylamide solution). The composition B is a regulator. After the composition A and the composition B are mixed, a discharge rate/speed of fire extinguishing substances is increased, so that an escape passage/route can be opened up quickly.

Claims

1. A preparation method of an aqueous fire extinguishing agent, the aqueous fire extinguishing agent comprising: a composition A and a composition B; wherein the composition A is a fortified water added with a flame retardant, a wetting agent and a colloid, and the composition B is a regulator; wherein the flame retardant of the composition A is one or more selected from the group consisting of carbonamide (CH.sub.4N.sub.2O), ammonium chloride (NH.sub.4Cl), diammonium hydrogen phosphate ((NH.sub.4).sub.2HPO.sub.4) and ammonium polyphosphate ((NH.sub.4).sub.n+2P.sub.nO.sub.3n+1), the wetting agent is APG0810, and the colloid is a polyacrylamide (PAM) solution; wherein the composition B is a sodium hydroxide (NaOH) solution; and wherein a working fluid for fire extinguishing is a mixture of the composition A and the composition B. wherein the preparation method of the aqueous fire extinguishing agent comprises: step (1), preparing a composition A: injecting 1000 milliliters (ml) of deionized water into a preparation vessel, placing the preparation vessel into a water bath device, keeping a water temperature at 20?40? C., adding 0?1000 g of the carbonamide (CH.sub.4N.sub.2O), 0?410 g of ammonium chloride (NH.sub.4Cl), 0?720 g of the diammonium hydrogen phosphate ((NH.sub.4).sub.2HPO.sub.4) and 0?200 g of the ammonium polyphosphate ((NH.sub.4).sub.n+2P.sub.nO.sub.3n+1) into the preparation vessel under stirring then adding 0.1?10 ml of the APG0810 with a solid content no less than 50% and 0.1?100 ml of polyacrylamide (PAM) solution with a concentration of 1?5, continuing to inject deionized water until a volume of an aqueous solution in the preparation vessel is up to 2000 ml, stirring the aqueous solution for complete dissolution, and a pH value of the aqueous solution being in a range of 7.0?7.5; step (2), preparing the composition B: preparing a sodium hydroxide solution with a concentration of 0.1?55%; step (3), performing a titration test: taking a part of the composition A prepared by the step (1) and using the composition B prepared by the step (2) for titration, completing the titration test when a pH value of a working fluid mixed with the composition B and the composition A being 9.0 and recording a dosage ratio of the composition A and the composition B; and step (4), filling the aqueous fire extinguishing agent: injecting the composition A first and then injecting the composition B and sealing to obtain a working fluid with the mixture of the composition A and the composition B, according to the dosage ratio of the composition A and the composition B obtained in the step (3); or, obtaining the working fluid by mixing the composition A and the composition B through a device in a fire extinguisher when the fire extinguisher being in use.

2. The preparation method of the aqueous fire extinguishing agent according to claim 1, wherein a value of polymerization degree n of the ammonium polyphosphate (NH.sub.4).sub.n+2P.sub.nO.sub.3n+1) is 10?20.

3. The preparation method of an aqueous fire extinguishing agent according to claim 1, wherein the step (3) comprises: measuring the part of the composition A by a volumetric flask, pouring the measured composition A into a beaker, inserting a calibrated pH meter into the beaker, adding the composition B dropwise by a burette while stirring, stopping the titration when a pH value measured by the pH meter is 9.0, reading a dropping amount of the composition B from the burette, and recording the dosage ratio of the composition A and the composition B.

Description

DETAILED DESCRIPTION OF EMBODIMENTS

(1) The technical scheme of the disclosure is further described in detail below in combination with illustrated embodiments.

Embodiment 1

(2) (1) A composition A is prepared according to the following proportions and methods:

(3) a preparation vessel is injected with 1000 milliliters (ml) of deionized water and is placed in a water bath device, and a water temperature is kept at 20?30? C. Under stirring, 240 grams (g) of carbonamide CH.sub.4N.sub.2O is added into the preparation vessel until completely is dissolved, 160 g of ammonium chloride NH.sub.4Cl is added into the preparation vessel until completely is dissolved, 264 g of diammonium hydrogen phosphate (NH.sub.4).sub.2HPO.sub.4 is added into the preparation vessel until completely is dissolved. 1 ml of alkyl polyglycoside APG0810 and 10 ml of polyacrylamide PAM solution with a concentration of 1 are then added. Afterwards, 11 g ammonium polyphosphate (NH.sub.4).sub.n+2P.sub.nO.sub.3n+1 with polymerization degree of 10 continues to be added, deionized water is injected until a volume of an aqueous solution in the preparation vessel is up to 2000 ml, the aqueous solution is stirred for complete dissolution, and a pH value of the aqueous solution is measured to be 7.27.

(4) (2) a composition B is prepared. Specifically, 100 ml of water is taken, and 50 g of sodium hydroxide NaOH is added and stirred until the sodium hydroxide NaOH is completely dissolved.

(5) (3) a titration test is performed. Specifically, 100 ml of the composition A is measured by a volumetric flask, the measured composition A is poured into a beaker, a sensor of a calibrated pH meter is inserted, a pH value measured by the pH meter is 7.27; subsequently, the composition B is added dropwise by an alkali or acid burette while stirring, the titration is stopped when a pH value measured by the pH meter is about 9, and a dropping amount of the composition B read from the burette is about 4.8 ml.

(6) (4) a fire extinguisher tank with a volume of 600 ml is taken, 500 ml of the composition A is filled therein first, 24 ml of the composition B is then injected and a sealing is immediately carried out thereafter to thereby obtain a fire extinguisher.

Embodiment 2

(7) (1) A composition A is prepared according to the following proportions and methods:

(8) a preparation vessel is injected with 1000 milliliters (ml) of deionized water and is placed in a water bath device, and a water temperature is kept at 20?30? C. Under stirring, 240 grams (g) of carbonamide CH.sub.4N.sub.2O is added into the preparation vessel until completely is dissolved, 160 g of ammonium chloride NH.sub.4Cl is added into the preparation vessel until completely is dissolved, 264 g of diammonium hydrogen phosphate (NH.sub.4).sub.2HPO.sub.4 is added into the preparation vessel until completely is dissolved. 1 ml of alkyl polyglycoside APG0810 and 10 ml of polyacrylamide PAM solution with a concentration of 1 are then added. Afterwards, 11 g ammonium polyphosphate (NH.sub.4).sub.n+2P.sub.nO.sub.3n+1 with polymerization degree of 10 continues to be added, deionized water is injected until a volume of an aqueous solution in the preparation vessel is up to 2000 ml, the aqueous solution is stirred for complete dissolution, and a pH value of the aqueous solution is measured to be 7.27.

(9) (2) a composition B is prepared. Specifically, 100 ml of water is taken, and 50 g of sodium hydroxide NaOH is added and stirred until the sodium hydroxide NaOH is completely dissolved.

(10) (3) a titration test is performed. Specifically, 100 ml of the composition A is measured by a volumetric flask, the measured composition A is poured into a beaker, a sensor of a calibrated pH meter is inserted, a pH value measured by the pH meter is 7.27; subsequently, the composition B is added dropwise by an alkali or acid burette while stirring, the titration is stopped when a pH value measured by the pH meter is about 9, and a dropping amount of the composition B read from the burette is about 4.8 ml.

(11) (4) a fire extinguisher with a volume of 600 ml is taken, and the fire extinguisher is installed a device containing 24 ml of the composition B therein. After the installation of the device, 500 ml of the composition A is filled into the fire extinguisher. The device containing the composition B in the fire extinguisher is destroyed before throwing the fire extinguisher, and the fire extinguisher is shaken for evenly mixing the composition B with the composition A and then is thrown out.

(12) The above illustrated embodiments are only preferred embodiments of the disclosure and are only used to explain the disclosure rather than limit the disclosure. Any change, replacement, combination, simplification, modification, etc. made by those skilled in the related art without departing from a spiritual essence and principle of the disclosure shall be equivalent replacement methods and shall be included in a protection scope of the disclosure.