JP2003135620A - Antifreeze agent composition for fire extinguishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antifreeze agent composition for fire extinguishing equipment having high antifreezing performance, which is capable of easily improving fire extinguishing performance as it is incombustible, and easily reducing loads on environment. SOLUTION: The antifreeze agent composition for fire extinguishing equipment contains a water as a main component, and also contains a formate as an antifreezing component. The composition is used as a fire extinguishing agent containing water as a main component for water-based fire extinguishing equipment. For example, it is filled in a pressurized state into a piping forming fire extinguishing sprinkler equipment, and develops an antifreezing effect in winter. A corrosionproof additive is preferably added to the composition for preventing corrosion of piping or the like composed of metallic materials. A concentration of the antifreezing component is preferably 20-60 wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifreeze for fire extinguishing equipment, which is used as an extinguishing agent containing water as a main component in a pipe of a fire extinguishing sprinkler equipment or an additive for adding to the extinguishing agent. Agent composition. More specifically, the present invention relates to an antifreeze composition for fire-extinguishing equipment, which contains formate as a main component, does not freeze even below freezing point, and is capable of reliably exhibiting its fire-extinguishing function.

[0002]

2. Description of the Related Art Conventionally, this type of antifreeze composition for fire extinguishing equipment has been constituted so that it contains water as a main component and also contains 50% by weight or less of ethylene glycol as an antifreeze component. Extinguishing media are known. This fire extinguishing agent is filled under pressure in the pipe of a closed type wet type fire extinguishing sprinkler equipment extended to the ceiling of an outdoor multi-storey parking lot where the temperature drops to below freezing in winter.

When a fire occurs in the outdoor multi-storey car park, the heat generated by the fire causes the sprinkler head to be heat-sensitively opened, and the extinguishing agent filled in the pressurized state is deflected by the deflector of the sprinkler head. While being hit, it is sprayed over a wide area and exerts a fire extinguishing function. In addition, since this fire extinguisher contains ethylene glycol, which has a high freezing point depressing action, it does not freeze in the pipes even when the temperature drops to below freezing, and it always maintains a state where water can be sprayed from the sprinkler head. ing.

[0004]

However, in the above-mentioned conventional fire extinguishing agent, the chemical oxygen demand (COD) and the biological oxygen demand of ethylene glycol contained as an antifreeze component are increased. (BOD) is extremely high,
The load on the environment was extremely high.

The present invention has been made by paying attention to the problems existing in the prior art as described above. The purpose is to have a high anti-freezing performance, and because it is nonflammable, the fire extinguishing ability can be easily increased, and the load on the environment can be easily reduced. To provide an antifreeze composition for use.

[0006]

In order to achieve the above object, an antifreeze composition for fire extinguishing equipment according to the invention of claim 1 is a fire extinguisher for water-based fire extinguishing equipment containing water as a main component. An antifreeze composition for fire extinguishing equipment, which is used as an additive for a fire extinguisher, characterized by containing formate as an antifreeze component.

The antifreeze composition for fire extinguishing equipment according to the invention of claim 2 is characterized in that, in the invention of claim 1, it further contains an anticorrosive additive. The antifreezing agent composition for fire extinguishing equipment of the invention according to claim 3 is
Alternatively, the invention according to claim 2 is characterized in that the concentration of the antifreezing component in the fire extinguishing agent is 20 to 60% by weight.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. The antifreeze composition for fire extinguishing equipment of the embodiment contains water as a main component and also contains formate as an antifreeze component. This antifreeze composition for fire-extinguishing equipment is suitable for use as an extinguishing agent for water-based fire-extinguishing equipment mainly composed of water, such as closed-type wet method, closed-type dry method, closed-type pre-operation type and open-type sprinkler equipment. To be done. This composition
In particular, it is suitable for use as an extinguishing agent for water-based fire extinguishing equipment installed in outdoor multi-storey parking lots and warehouses where the ambient temperature drops below freezing. It is configured to be able to exert.

The formate salt is contained as an antifreezing component in the antifreeze composition for fire extinguishing equipment, and lowers the freezing point of the composition to prevent freezing. This formate has the property of exhibiting a very high freezing point lowering action, and has the property that the viscosity of the solution does not increase so much even when the aqueous solution is cooled to a low temperature of about -20 to -55 ° C. In addition, the formate is non-flammable with little corrosivity and volatility, as well as chemical oxygen demand (COD) and biological oxygen demand (BOD). Since it is extremely low, it is difficult to cause environmental pollution.

Since this formate salt has good solubility in water and is inexpensive, it is preferable to contain an alkali metal salt of formic acid such as sodium formate or potassium formate, which has very high solubility in water. It is most preferable to include potassium formate because it is high. Alternatively, the alkali metal salt of formic acid may be obtained by adding sodium hydroxide or potassium hydroxide to the antifreeze composition for fire extinguishing equipment containing formic acid to adjust the pH.

The concentration of the antifreeze component (formate salt) in the antifreeze composition for fire extinguishing equipment is appropriately determined depending on the environmental temperature in which the composition is used, but is preferably 2
It is 0 to 60% by weight, more preferably 30 to 50% by weight. If the concentration of the antifreeze component is less than 20% by weight, the antifreeze composition for fire-extinguishing equipment may be frozen when cooled to -15 ° C or lower. Conversely, 60
When the content exceeds the weight%, the viscosity of the antifreeze composition for fire extinguishing equipment may be significantly increased.

Further, it is preferable that the antifreeze composition for fire-extinguishing equipment is made to contain an anticorrosive additive for preventing the corrosion of the metal material constituting the water-based fire-extinguishing equipment. Examples of the metal material include pipes mainly made of copper, a copper alloy, and an iron-based metal. As the anticorrosion additive, at least one selected from aliphatic carboxylic acids, phosphoric acids and triazole compounds is preferably used, and these three kinds of anticorrosion additives are simultaneously used as an antifreeze composition for fire extinguishing equipment. Most preferably, it is contained therein.

Examples of the aliphatic carboxylic acids as an anticorrosive additive include aliphatic dicarboxylic acids, aliphatic monocarboxylic acids and their alkali metal salts, mainly iron-based,
It has an excellent corrosion prevention effect on copper-based and aluminum-based metals.

As the aliphatic dicarboxylic acid and its alkali metal salt (hereinafter referred to as "aliphatic dicarboxylic acid"), those having 3 to 6 carbon atoms are preferably used.
Examples thereof include malonic acid having 3 carbon atoms, succinic acid having 4 carbon atoms, glutaric acid having 5 carbon atoms, adipic acid having 6 carbon atoms, and their sodium salts or potassium salts. If the aliphatic dicarboxylic acid has a carbon number of 2 or less, the corrosion inhibiting effect on the metal material is remarkably reduced, and conversely, if it is 7 or more, the solubility is remarkably reduced, which is not preferable.

As the aliphatic monocarboxylic acid and its alkali metal salt (hereinafter referred to as "aliphatic monocarboxylic acid"), those having 5 to 10 carbon atoms are preferably used, and those having 5 or 6 carbon atoms are used. Are most preferably used. When the aliphatic monocarboxylic acids have a carbon number of 4 or less, they are difficult to handle because of high volatility, and when they are 11 or more, the solubility is remarkably lowered, which is not preferable. Examples of the aliphatic monocarboxylic acids include valeric acid having 5 carbon atoms, caproic acid having 6 carbon atoms, caprylic acid having 8 carbon atoms, capric acid having 10 carbon atoms, and their sodium salts or potassium salts. Is mentioned.

The amount of these aliphatic carboxylic acids is preferably 0.5 to 15.0% by weight, more preferably 5.0% by weight.
It is contained within a concentration range of from more than 1 to 15.0% by weight. If the concentration of the aliphatic carboxylic acids is less than 0.5% by weight, the metal material cannot exhibit a sufficient corrosion preventing effect. On the other hand, if it exceeds 15.0% by weight, it may not be completely dissolved in the antifreeze composition for fire extinguishing equipment.

Phosphoric acid as an anticorrosion additive is contained mainly for preventing the corrosion of iron-based, copper-based and aluminum-based metals. For example, phosphoric acid, disodium phosphate,
Examples thereof include dipotassium phosphate, sodium hydrogen phosphate and potassium hydrogen phosphate. This phosphoric acid is preferably 0.01 to 1.5% by weight in the antifreeze composition for fire extinguishing equipment,
More preferably, it is contained within a concentration range of more than 1.0% by weight to 1.5% by weight. When the concentration of the phosphoric acid is less than 0.01% by weight, it is not possible to sufficiently prevent corrosion of iron-based, copper-based and aluminum-based metals.
On the other hand, if it exceeds 1.5% by weight, it may not be completely dissolved in the antifreeze composition for fire extinguishing equipment.

The triazole compound as an anticorrosion additive is contained mainly for preventing the corrosion of copper-based metals, and benzotriazole, tolyltriazole or their amine salts are preferably used. This triazole compound is preferably added to the antifreeze composition for fire extinguishing equipment in an amount of 0.1.
It is contained in a concentration of 01 to 0.5% by weight. If the concentration of the triazole compound is less than 0.01% by weight, it is not possible to sufficiently prevent corrosion of the copper-based metal. On the other hand, if it exceeds 0.5% by weight, it may not be completely dissolved in the antifreeze composition for fire extinguishing equipment.

Further, it is preferable that at least one anticorrosive additive selected from thiazole compounds, borate salts, molybdate salts and nitrite salts is contained in the antifreeze composition for fire extinguishing equipment.

The thiazole compound is mainly contained to more effectively prevent corrosion of copper-based metals, and examples thereof include mercaptobenzothiazole, mercaptobenzothiazole and alkali metal salts (sodium salt or potassium salt) thereof. To be The thiazole compound is preferably contained in the antifreeze composition for fire extinguishing equipment at a concentration of 0.01 to 1.0% by weight. If the concentration of the thiazole compound is less than 0.01% by weight, the corrosion of the copper-based metal cannot be sufficiently prevented. On the other hand, if it exceeds 1.0% by weight, it may not be completely dissolved in the antifreeze composition for fire extinguishing equipment.

The borate is contained mainly for more effectively preventing the corrosion of the iron-based metal, and examples thereof include boric acid, sodium borate and potassium borate.
This borate is 0.01% in the antifreeze composition for fire extinguishing equipment.
It is preferably contained at a concentration of ˜1.0% by weight. If the concentration of the borate is less than 0.01% by weight, the corrosion of the ferrous metal cannot be sufficiently prevented. Conversely, 1.
If it exceeds 0% by weight, it may not be completely dissolved in the antifreeze composition for fire-extinguishing equipment.

The molybdate is mainly contained to more effectively prevent corrosion of iron-based metals, and examples thereof include molybdic acid, sodium molybdate, and potassium molybdate. The molybdate is preferably contained in the antifreeze composition for fire extinguishing equipment at a concentration of 0.01 to 1.0% by weight. If the concentration of this molybdate is less than 0.01% by weight, the corrosion of the iron-based metal cannot be sufficiently prevented. On the other hand, if it exceeds 1.0% by weight, it may not be completely dissolved in the antifreeze composition for fire extinguishing equipment.

The nitrite is mainly contained to more effectively prevent the corrosion of the iron-based metal, and examples thereof include nitrous acid, sodium nitrite and potassium nitrite.
This nitrite is 0.01% in the antifreeze composition for fire extinguishing equipment.
It is preferably contained at a concentration of ˜5% by weight. If the concentration of the nitrite is less than 0.01% by weight, the corrosion of the iron-based metal cannot be sufficiently prevented. On the contrary, 5% by weight
If it exceeds the range, it may not be completely dissolved in the antifreeze composition for fire extinguishing equipment.

Further, it is preferable to add a solubilizer for enhancing the solubility of the anticorrosive additive to the antifreeze composition for fire extinguishing equipment. As the solubilizer, glycols such as ethylene glycol and diethylene glycol are preferably used because they are easily available and less likely to deteriorate the antifreezing performance. The concentration of this solubilizer is preferably 0.1 to 10% by weight, more preferably 0.1 to 5% by weight. If the concentration of the solubilizer is less than 0.1% by weight, the solubility of the anticorrosion additive cannot be sufficiently increased. On the other hand, if it exceeds 10% by weight, the viscosity of the antifreeze composition for fire extinguishing equipment will increase.

In the antifreeze composition for fire extinguishing equipment,
An antifoaming agent for preventing foam generation, a coloring agent for facilitating visual recognition, a bitterness agent for preventing accidental ingestion, and the like may be added in an appropriate combination. Examples of the defoaming agent include organic polar compound defoaming agents such as polyether defoaming agents and polymer alcohol defoaming agents, and silicone defoaming agents. As the colorant, an edible or industrial dye or p for coloring the antifreeze composition for fire extinguishing equipment such as food yellow No. 4, uranine concrete, acid green 25, phenol red or the like.
H indicator is mentioned. Examples of bitterness agents include denatonum benzoate.

Further, in order to enhance the anticorrosive effect of the antifreeze composition for fire fighting equipment, it is preferable to adjust the pH of the antifreeze composition for fire fighting equipment to 7 to 11. When the pH of the antifreeze composition for fire extinguishing equipment is less than 7, there is a possibility that corrosion of ferrous metals may be accelerated. On the other hand, if the pH exceeds 11, the corrosion of the copper-based metal may be accelerated. In addition, as the salt contained in this composition, an alkali metal salt is preferable because it is difficult to form an insoluble matter.

Next, the action of the antifreeze composition for fire extinguishing equipment will be described. The closed-type wet type fire extinguishing sprinkler equipment is provided with an always effective water source, a reliable pressurized water supply device and a flowing water detection device, piping (sprinkler piping and water source piping), and a sprinkler head.
The antifreezing agent composition for fire extinguishing equipment is always filled in a pressurized state in a sprinkler pipe that connects the pressurized water supply device to the sprinkler head. In addition, when the water source is exposed to the ambient temperature below freezing, the water source piping that connects the water source to the pressurized water supply device is also filled, and if necessary, in the outdoor fire protection water tank that constitutes the water source. Etc. are also stored.

The antifreeze composition for fire extinguishing equipment in the fire extinguishing sprinkler equipment does not freeze in the pipe or the like due to the high freezing point depressing action of formate even when the environmental temperature drops to below freezing point. , It is always in a condition where water can be discharged from the sprinkler head. Further, even when the pipe is filled in the pipe for a long period of time, the anticorrosive additive continuously exerts the effect of preventing the corrosion of the metal, so that the sprinkler equipment does not have a problem due to the corrosion.

When a fire occurs at the place where this fire extinguishing sprinkler equipment is installed, first, the sprinkler head is thermally actuated by the heat to be opened, and the fire extinguishing equipment as a fire extinguishing agent filled in the sprinkler pipe is opened. The cryogen composition is sprayed from the sprinkler head. Subsequently, the pressurized water supply device is activated by the water discharge, and continuous water discharge is performed while the fire extinguisher (water or the antifreeze composition for fire fighting equipment) is being sent from the water source through the water source pipe and the sprinkler pipe, and running water from the water source is also supplied. Is detected by a water flow detection device and an alarm signal is transmitted. The antifreeze composition (water) for fire-extinguishing equipment discharged from the sprinkler head extinguishes the fire or suppresses the fire particularly at the initial stage of the fire, thereby contributing to the spread of the spread of fire.

On the other hand, the antifreeze composition for fire extinguishing equipment can be used in the same manner in closed dry type, closed pre-operation type and open type fire extinguishing sprinkler equipment. That is, the closed type dry type sprinkler equipment, in the wet type sprinkler equipment, is provided with a dry type valve in the sprinkler pipe, the antifreeze agent for the fire extinguishing equipment in a pressurized state between the dry valve and the pressurized water supply device. The composition is the same except that the composition is filled. The closed type pre-operated sprinkler equipment is the above-mentioned wet type or dry type sprinkler equipment, in which a fire detection head or a fire detector is provided separately from the sprinkler head, and when both this and the sprinkler head detect a fire. The water is now being discharged. Further, the open type sprinkler equipment is the same as the closed type wet type sprinkler equipment, in which a simultaneous opening valve is provided in the sprinkler pipe, and a pressurizing fire extinguisher equipment is installed between the simultaneous opening valve and the pressurized water supply device. It has the same constitution except that it is filled with a cryogen composition.

The effects exhibited by the above embodiment will be described below. -The antifreeze composition for fire extinguishing equipment of the embodiment contains water as a main component and also contains a formate as an antifreezing component. Therefore, by using this antifreeze composition for fire-extinguishing equipment as a fire-extinguishing agent for water-based fire-extinguishing equipment, it exerts a high antifreezing effect due to the formate salt, and even in an environment where the ambient temperature drops below freezing. Therefore, it is possible to maintain a state in which water can be constantly discharged without freezing. In particular, formate is extremely useful because it has a higher freezing point lowering action than the conventional ethylene glycol described above and a high antifreezing effect can be obtained at a low concentration.

Furthermore, since the formate salt is nonflammable, the fire extinguishing ability can be easily enhanced. In addition, the formate in the antifreeze composition for fire-extinguishing equipment has a significantly low COD and BOD and has a PRTR
(Pollutant Release and Transfer Register) Since it is not a chemical substance that complies with the Law and has high biodegradability, it hardly causes environmental pollution even when it is discharged into the environment.

By including an anticorrosive additive in the antifreeze composition for fire extinguishing equipment, it is possible to very effectively prevent the corrosion of the metal material constituting the sprinkler pipe or the like. Therefore, the fire extinguishing equipment can be used for a long period of time with almost no trouble, and the labor and cost required for the maintenance can be easily reduced.

[0034]

EXAMPLES Examples and comparative examples embodying the above embodiment will be described below. In addition,% described below is
Unless otherwise specified, it represents% by weight.

Examples 1 to 4 and Comparative Examples 1 to 3 Examples 1 to 4 were prepared by mixing the components (%) shown in Table 1.
4 and the antifreeze compositions for fire extinguishing equipment of Comparative Examples 1 to 3 were produced. In the composition of Example 3, a very small amount of ethylene glycol was added as a dissolving agent for dissolving the anticorrosive additive and the like. These Examples 1 to 4 and Comparative Examples 1 to
3 for each composition, freezing temperature, COD and B.I.
At least one physical property value selected from OD was investigated.
The results are shown in Table 1.

[0036]

[Table 1] As a result, it was shown that potassium formate contained in Examples 1 to 4 exhibited a high antifreezing effect at a low concentration as compared with the ethylene glycol contained in Comparative Examples 1 to 3. Furthermore, for COD and BOD, formate was shown to be less than one-twentieth of ethylene glycol.

The composition of Example 3 was tested according to JIS
K 2265 "Crude oil and petroleum product flash point test method" was conducted in a Cleveland open-type test and found to be 110 ° C.
It was confirmed that boiling did not start even if concentrated until potassium formate was precipitated and did not ignite.

(Examples 5 to 7 and Comparative Example 1) The components (%) shown in Table 2 were mixed to prepare antifreeze compositions for fire extinguishing equipment of Examples 5 to 7. In addition, in the compositions of Examples 5 to 7, a small amount of ethylene glycol was added as a dissolving agent for dissolving the anticorrosive additive and the like. With respect to each of the compositions of Examples 5 to 7 and Comparative Example 1, the corrosion amount (mg / cm ² ) of the metal test piece was measured according to the method described in JIS K2234.
Details of the test conditions are described below, and the results are shown in Table 2.

[0039] Test piece: Copper, brass, steel Test temperature: 88 ± 2 ℃ Liquid volume: 750 ml Test time: 336 ± 2 hours Aeration conditions: 100 ml / min

[0040]

[Table 2] As a result, it was shown that the compositions of Examples 5 to 7 had a significantly reduced amount of corrosion of copper, brass and steel as compared with the composition of Comparative Example 1.

The above embodiment may be modified as follows. -The above antifreeze composition for fire extinguishing equipment diluted with water may be used as a fire extinguisher. That is, an aqueous solution or powder in which components such as formate are highly concentrated is used as an additive for a fire extinguisher, and the additive is added to water to form a fire extinguisher. The diluted fire extinguishing agent is preferably 20
It is preferable that the formate salt is contained in an amount of -60% by weight, more preferably 30-50% by weight. With this configuration,
It is extremely versatile because it is easy to adjust the formate concentration according to the ambient temperature. Further, it becomes possible to easily manufacture, sell and transport the antifreeze composition for fire extinguishing equipment. In particular, when the antifreeze composition for fire extinguishing equipment is made into a powder form, its production, sale and transportation can be further facilitated.

The antifreeze composition for fire extinguishing equipment may be applied to indoor fire hydrant equipment or foam fire extinguishing equipment (sensing sprinkler, etc.). -Do not add anticorrosion additives to the antifreeze composition for fire fighting equipment. When configured in this manner, it becomes possible to provide the antifreeze composition for fire-extinguishing equipment that is stored in an outdoor fire protection water tank that is not made of metal, for example, at a lower cost.

Further, the technical idea which can be understood from the above embodiment will be described below. The antifreeze composition for fire extinguishing equipment according to claim 2 or 3, wherein the anticorrosive additive is at least one selected from aliphatic carboxylic acids, phosphoric acids and triazole compounds.

The antifreeze composition for fire-extinguishing equipment according to claim 2 or 3, wherein a solubilizer is further added. -An antifreeze composition for fire-fighting equipment, which is mainly composed of water and is used as an extinguishing agent for water-based fire-fighting equipment, which contains water as a main component and also contains formate as an antifreezing component. A characteristic antifreeze composition for fire extinguishing equipment. When configured in this manner, it has high antifreezing performance, and because it is nonflammable, it is possible to easily enhance the fire extinguishing ability and easily reduce the load on the environment.

An antifreeze composition for a fire extinguisher used as an additive for a fire extinguisher for adding to a fire extinguisher for a water-based fire extinguisher containing water as a main component, formic acid as an antifreezing component An antifreeze composition for fire-extinguishing equipment, which comprises a salt. When configured in this manner, it has high antifreezing performance, and because it is nonflammable, it is possible to easily enhance the fire extinguishing ability and easily reduce the load on the environment.

[0046]

As described in detail above, the present invention has the following effects. According to the antifreeze composition for fire extinguishing equipment of the invention described in any one of claims 1 to 3, the composition has high antifreezing performance, and since it is nonflammable, the fire extinguishing ability can be easily enhanced and the environment It is possible to easily reduce the load on the.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2E189 CA07 CA08 CA09 CB01 CC01                       CC02 CD01                 2E191 AA01 AB41

Claims (3)

[Claims] 1. A fire-extinguishing composition for water-based fire-extinguishing equipment comprising water as a main component or an antifreeze composition for fire-extinguishing equipment used as an additive for the fire-extinguishing agent, comprising a formate as an antifreezing component. An antifreeze composition for fire extinguishing equipment, characterized by containing. 2. The antifreeze composition for fire extinguishing equipment according to claim 1, further comprising an anticorrosive additive. 3. The concentration of the antifreezing component in the fire extinguishing agent is 20.
The antifreeze composition for fire-extinguishing equipment according to claim 1 or 2, wherein the composition is set to be 60% by weight.