CN1931395A

CN1931395A - Process for producing fire extinguishing agent

Info

Publication number: CN1931395A
Application number: CN 200510102590
Authority: CN
Inventors: 田山繁明
Original assignee: BONAIX Co Ltd
Current assignee: BONAIX Co Ltd
Priority date: 2005-09-12
Filing date: 2005-09-12
Publication date: 2007-03-21
Anticipated expiration: 2025-09-12
Also published as: CN1931395B

Abstract

一种制备灭火剂的方法，该方法包括以下步骤：相对于500毫升的灭火剂溶液，将5～15克的氯化钠和50～70克的磷酸二氢铵加入温度为30～40℃热水中溶解；和相对于500毫升的灭火剂溶液，将50～70克的碳酸氢铵加入上述溶液中使之溶解。将最终制得的灭火剂装入一个可用于灭火器的容器，起火时，将该灭火器抛向火源。本发明可提供一种对人体没有或少有影响的安全的灭火剂。A method for preparing a fire extinguishing agent, the method comprising the following steps: adding 5 to 15 grams of sodium chloride and 50 to 70 grams of ammonium dihydrogen phosphate to 500 milliliters of fire extinguishing agent solution and heating the Dissolving in water; and relative to 500 ml of fire extinguishing agent solution, adding 50-70 g of ammonium bicarbonate into the above solution to dissolve it. Put the final fire extinguishing agent into a container that can be used in a fire extinguisher, and throw the fire extinguisher to the fire source in case of fire. The present invention can provide a safe fire extinguishing agent which has little or no influence on the human body.

Description

Preparation method of fire extinguishing agent

Technical Field

The invention relates to a method for preparing a fire extinguishing agent.

Background

The fire extinguishing agent is composed of a plurality of components. For example, Japanese patent laid-open No.2001-37901 discloses a fire extinguishing agent containing urea, sodium chloride, anhydrous sodium carbonate, ammonium sulfate, etc.

However, among the methods for preparing fire extinguishing agents, many methods do not disclose a know-how as a trade secret. A method of preparing a fire extinguishing agent will be disclosed herein.

In recent years, there have been commercially available throw-type fire extinguishers that can be thrown toward a fire source, in addition to portable fire extinguishers. In the actual operation of fire extinguishing, because a portable fire extinguisher is sometimes difficult to use, and the throwing type fire extinguisher can extinguish fire only by throwing towards a fire source, people think that the throwing type fire extinguisher is convenient to use and has obvious effect.

However, the components constituting the fire extinguishing agent are not necessarily all safe, and problems may occur when they are taken by children or the elderly by mistake.

Therefore, there is a need for a method of preparing a safe fire extinguishing agent having no or little adverse effects on the human body.

In addition, it is desirable to provide a method for preparing a safe fire extinguishing agent, which is effectively treated so that components added thereto exhibit their effects, thereby preparing a fire extinguishing agent having high extinguishing performance.

Disclosure of Invention

The invention provides a method for preparing a fire extinguishing agent, which comprises the following steps:

adding 5-15 g of sodium chloride and 50-70 g of ammonium dihydrogen phosphate into hot water with the temperature of 30-40 ℃ relative to 500 ml of fire extinguishing agent solution for dissolving, and

50-70 g of ammonium bicarbonate is added to 500 ml of the fire extinguishing agent solution to dissolve the fire extinguishing agent solution.

The method of the present invention further comprises the step of adding a surfactant.

In another aspect of the present invention, there is provided a method of preparing a fire extinguishing agent, the method comprising the steps of:

adding 5-15 g of sodium chloride and 50-70 g of ammonium dihydrogen phosphate into hot water with the temperature of30-40 ℃ for dissolving relative to 500 ml of fire extinguishing agent solution,

adding 45-70 g of ammonium bicarbonate into the solution for dissolving relative to 500 ml of fire extinguishing agent solution,

adding 20-40 g of urea to 500 ml of the fire extinguishing agent solution to dissolve the urea, and

35 to 55 g of ammonium sulfate was added to 500 ml of the fire extinguishing agent solution to dissolve the fire extinguishing agent solution.

The method of another aspect of the present invention further comprises the step of adding a surfactant.

Detailed Description

(first embodiment)

A first embodiment of the present invention will now be described in detail.

First, 5 to 15 g (e.g., 10 g) of sodium chloride is added to an appropriate amount of water having a temperature of 30 to 40 ℃ (e.g., about 40 ℃), and then, the mixture is stirred to dissolve the sodium chloride in the water. Sodium chloride was used as a catalyst.

Then, 50 to 70 g (for example, 60 g) of ammonium dihydrogen phosphate is added and dissolved, and 50 to 70 g (for example, 60 g) of ammonium hydrogen carbonate is added to cause a reaction, thereby dissolving it.

During the fire extinguishing process, ammonium dihydrogen phosphate and ammonium bicarbonate are thermally decomposed into carbon dioxide (CO) gas by combustion₂) And ammonia (NH)₃). The carbon dioxide gas can shield the oxygen supply to the combustion articles and can neutralize and inhibit the oxidation reaction of the combustion articles. The ammonia gas has neutralizing and cooling effects, and can prevent the re-combustion of the burning objects to avoid the spread of fire to the surroundings.

Subsequently, a certain amount of boiling water was added to the solution.

Then, water was added to make the total amount of the fire extinguishing agent 500 ml.

Finally, an effective amount of surfactant (e.g., alpha foam: a surfactant that forms an aqueous film-like foam, available from Yamato Protec K.K.) is added to 500 milliliters of the fire extinguishing agent, as the case may be.

The reactions generated by combustion during the fire extinguishing process are as follows:

the thus prepared fire extinguishing agent was filled in an existing container. The container for containing the fire extinguishing agent of the present invention may be various containers which can store the fire extinguishing agent of the present invention in a stable state without deterioration and without interference with the fire extinguishing agent of the present invention. Examples of the container that can be used include, but are not limited to, a metal container and a lightweight resin container.

(second embodiment)

Another embodiment of the present invention will be described below.

First, 5 to 15 g (e.g., 10 g) of sodium chloride is added to an appropriate amount of water at 30 ℃, and then the mixture is stirred to dissolve the sodium chloride in the water. Sodium chloride was used as a catalyst.

Then, 50 to 70 g (for example, 50 g) of ammonium dihydrogen phosphate is added and dissolved therein, and 45 to 70 g (for example, 45 g) of ammonium hydrogen carbonate is added to cause a reaction, thereby dissolving it.

Then, an appropriate amount of boiling water was added to the solution.

During the fire extinguishing process, ammonium dihydrogen phosphate and ammonium bicarbonate are thermally decomposed into carbon dioxide gas and ammonia gas due to combustion. The carbon dioxide gas can block the oxygen supply of the combustion products and can neutralize and inhibit the oxidation reaction of the combustion products. The ammonia gas has neutralizing and cooling effects, and can prevent the re-combustion of the burning objects to avoid the spread of fire to the surroundings.

Then, 20 to 40 g (for example, 20 g) of urea is added to the solution to dissolve it. Thereafter, 35 to 55 g (e.g., 45 g) of ammonium sulfate and an appropriate amount of boiling water are added to dissolve the ammonium sulfate.

During the fire extinguishing process, urea is also thermally decomposed into carbon dioxide gas and ammonia gas by combustion. Since carbon dioxide gas has a function of shielding the supply of oxygen to the burning goods and ammonia gas has a neutralizing and cooling function, the burning goods can be extinguished and the spread of fire to the surroundings can be prevented.

Finally, 20 ml of a surfactant (e.g., alpha foam) was added to 500 ml of the fire extinguishing agent as the case requires.

According to the first and second embodiments of the method for preparing a fire extinguishing agent of the present invention, a safe fire extinguishing agent having no or little influence on the human body can be provided. The use of ammonium bicarbonate can improve the fire extinguishing efficiency.

The extinguishing efficiency when using conventional ammonium carbonate and the extinguishing rate when using ammonium bicarbonate are shown below.

TABLE 1

Rate of speed

Ammonium carbonate 45 seconds

Ammonium bicarbonate 25 seconds

The fire extinguishing agent prepared by the present invention can be used for a fire extinguisher, if it is contained in an appropriate container, and the fire extinguisher is thrown toward a fire source when a fire occurs. The present invention can provide a safe fire extinguishing agent having no or little influence on the human body. The use of ammonium bicarbonate can increase the rate of fire suppression.

Claims

1. A method of preparing a fire extinguishing agent, the method comprising the steps of:

5 to 15 grams of sodium chloride and 50 to 70 grams of ammonium dihydrogen phosphate are added into hot water with the temperature of 30 to 40 ℃ for dissolving relative to 500 milliliters of fire extinguishing agent solution,

adding 50 g to 70 g of ammonium bicarbonate to 500 ml of the fire extinguishing agent solution to dissolve the ammonium bicarbonate, and

water was added to make the total amount of fire suppressant 500 ml.

2. The method of claim 1, further comprising the step of adding an effective amount of a surfactant.

3. The method of claim 2, wherein the surfactant comprises a fluorine-based surfactant to form an aqueous film-like foam.

4. The method of claim 1, wherein the fire extinguishing agent is packaged into an off-the-shelf container that can be used as a fire-throwing extinguisher.

5. A method of preparing a fire extinguishing agent, the method comprising the steps of:

adding 20 g-40 g of urea into the solution for dissolving relative to 500 ml of fire extinguishing agent solution,

adding 35 g to 55 g of ammonium sulfate to 500 ml of the fire extinguishing agent solution to dissolve the fire extinguishing agent solution, and

water was added to make the total amount of fire suppressant 500 ml.

6. The method of claim 5, further comprising the step of adding a surfactant.

7. The method of claim 6, wherein the surfactant comprises a fluorine-based surfactant to form an aqueous film-like foam.

8. The method of claim 5, wherein the fire extinguishing agent is packaged into an off-the-shelf container that can be used as a fire-throwing extinguisher.

9. The method of claim 6, wherein an appropriate amount of boiling water is added to the solution prior to adding urea to the solution.