KR101209706B1 - Fire extinguishing agent composition for solid-aerosol automatic extinguisher and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A fire extinguishing composition for a solid aerosol fire extinguisher system and a preparation method thereof are provided to improve stability against external shocks or vibration. CONSTITUTION: A fire extinguishing composition for a solid aerosol fire extinguisher system comprises 60-90 wt% of potassium nitrate, 1-10 wt% of potassium permanganate, 1-10 wt% of flammable metal powder, and 5-25 wt% of epoxy resin. The flammable metal powder is selected from magnesium, aluminum, titanium, zirconium, potassium, zinc, cesium, and lithium. An oxidant is selected from a group consisting of potassium perchlorate, potassium carbonate, potassium nitrite, potassium dichromate, potassium citrate, potassium bicarbonate, sodium nitrate, sodium bicarbonate, ammonium nitrate, ammonium perchlorate, barium nitrate, and cesium nitrate.

Description

Fire extinguishing composition for solid aerosol fire extinguishing device and its manufacturing method {FIRE EXTINGUISHING AGENT COMPOSITION FOR SOLID-AEROSOL AUTOMATIC EXTINGUISHER AND MANUFACTURING METHOD THEREOF}

The present invention relates to a fire extinguishing composition, and more particularly, to a solid material composed of potassium nitrate, potassium permanganate, combustible metal powder, and an epoxy resin, which has enhanced strength, improved thermal stability and extinguishing performance, and toxic gas during fire extinguishing. It relates to a fire extinguishing composition for a solid aerosol fire extinguishing device and a method for producing the same.

Fire extinguishers are used for extinguishing fires in the early stages. Fires are classified into general fires, oil fires, electric fires, and metal fires according to their characteristics. The fire is extinguished, and the fire extinguisher is further divided into a powder fire extinguisher, a carbon dioxide fire extinguisher, and a halon fire extinguisher according to the extinguishing composition charged therein. Conventional solid aerosol fire extinguishers are extinguished when the combustion is started through the ignition to extinguish the fire by extinguishing the aerosol type extinguishing gas.

The solid aerosol fire extinguishing system is equipped with a moving part, a fire extinguishing solid, and a cooling device in a relatively small device. Due to its characteristics, the solid aerosol fire extinguishing device is often installed in a high temperature or high humidity environment due to poor environmental conditions such as switchboards and other electrical rooms. Fire extinguishing equipment is required.

However, to date, most of the solid aerosol fire extinguishing device for the extinguishing composition contains glycerin or nitrocellulose (wax), which is affected by the ambient temperature, there is a risk of explosion, and a large amount of toxic gas is generated when the fire extinguishing device is operated. In addition, the use of a primer or a fuse head as an ignition device to operate a solid aerosol is not only poor thermal stability, but also about 24% when using nitrocellulose as a composition composition of the molded body is used for thermal decomposition There is a limit that can not maximize the content of nitrates to provide a digestive component has a problem that the digestibility is low.

In addition, the extinguishing composition for a solid aerosol fire extinguishing device is usually molded into a solid material, and the strength, thermal stability, and extinguishing efficiency of the molded product vary depending on the type of resin added for this purpose. There is a problem that is easily broken by the fire extinguishing efficiency rapidly.

Therefore, the development of solid aerosol fire extinguishing system is not only necessary for the development of products with improved extinguishing performance by eliminating powders such as primers and electric ignition jade, but also improves the stability and extinguishing performance of heat while releasing toxic gases when the extinguishing system is operated. There is an urgent need for the development of products that do not occur.

1. Japanese Unexamined Patent Publication No. 2010-11531 (published May 27, 2010) 2. Japanese Patent Laid-Open No. 2009-72594 (published Apr. 9, 2009)

The present invention has been made to solve the above problems, in the solid aerosol fire extinguishing device comprising a starting part comprising a fire extinguishing agent which is gasified by high temperature and high pressure by heating heating method, solid aerosol fire extinguishing used in this It is an object of the present invention to provide a solid aerosol composition for fire extinguishing, comprising a potassium nitrate, potassium permanganate, combustible metal powder, and an epoxy resin used in a solid aerosol fire extinguishing device, and a method for producing the same.

In particular, the present invention is a solid aerosol fire extinguishing device provided with a starting unit (Patent 10-1118618) comprising a fire extinguishing agent that is a high temperature and high pressure gasification (aerosolization) by the heating heating method invented by the present inventors, It is an object of the present invention to provide a solid aerosol composition for fire extinguishing capable of stably realizing the object of the present invention by the operation of the starting unit.

Another object of the present invention is to provide a method for preparing the extinguishing composition and a solid aerosol extinguishing apparatus using the same.

According to the present invention, the present invention provides a solid aerosol fire extinguishing device having a starter including a fire extinguishing agent which is hot aerosolized (aerosolized) by a heating method as a driving element, wherein the high temperature generated and discharged from the starter is discharged. Extinguishing composition that can exert extinguishing function by extinguishing aerosol by extinguishing high temperature and high pressure gasification by high pressure gas. It is about.

Each component of the present invention is composed of 60 to 90% by weight of potassium nitrate, 1 to 10% by weight of potassium permanganate, 1 to 10% by weight of combustible metal powder, and 5 to 25% by weight of epoxy resin.

In the present invention, the combustible powder may be at least one selected from the group consisting of magnesium, aluminum, titanium, zirconium, potassium, zinc, cesium, and lithium.

In the present invention, the composition is at least one oxidizing agent selected from the group consisting of potassium perchlorate, potassium carbonate, potassium nitrite, potassium bichromate, potassium citrate, potassium bicarbonate, sodium nitrate, sodium bicarbonate, ammonium nitrate, ammonium perchlorate, barium nitrate and cesium nitrate May be further included together with the potassium nitrate, and the amount of the oxidizing agent to potassium nitrate is preferably 8% by weight or less based on the total weight of the potassium nitrate and the oxidizing agent. Here, as an example of the additional content of the oxidizing agent, 8% by weight of potassium nitrate means 8 parts by weight of oxidizing agent relative to 92 parts by weight of potassium nitrate.

In the present invention, the composition may further include a resin selected from the group consisting of a phenol resin, melamine resin, unsaturated polyester resin, silicon resin and combinations thereof with the epoxy resin. The additional content of the resin selected from the group consisting of phenol resins, melamine resins, unsaturated polyester resins, silicon resins and combinations thereof with respect to the epoxy resins is epoxy resins and phenol resins, melamine resins, unsaturated polyester resins, silicon resins and these 3 weight% or less is appropriate with respect to the total weight of the resin selected from the group which consists of a combination of the following. Here, as an example of the additional content of the resin selected from the group consisting of phenol resins, melamine resins, unsaturated polyester resins, silicon resins, and combinations thereof, 3 weight% of epoxy resins is based on 97 weight parts of epoxy resins and melamine resins. It means that the resin selected from the group consisting of unsaturated polyester resins, silicon resins and combinations thereof is 3 parts by weight.

In one embodiment of the present invention, the potassium nitrate, potassium permanganate, combustible metal powder may have a particle size of 30 ~ 200 ㎛.

In one embodiment of the invention, the composition is a solid, it may have a compressive strength of 500 kgf / cm ² or more.

According to another aspect of the present invention, the step of pulverizing potassium nitrate, potassium permanganate and mixing the combustible metal powder and epoxy resin into a molding mold and pressurized to a pressure of 100 to 300 kg / cm ² , 80 to 100 It relates to a method for preparing a fire extinguishing composition for a solid aerosol fire extinguishing apparatus comprising the step of heating to a ℃ to form a solid.

According to another aspect of the present invention, the solid aerosol fire extinguishing composition is filled with a solid aerosol fire extinguishing device.

The extinguishing agent composition according to the present invention has improved thermal stability and does not cause physical property change due to heat even at a high temperature place, and has high potassium radical generation efficiency and excellent extinguishing performance, and has high compressive strength when molded into a solid material. Excellent stability, there is an advantage that no toxic gas is discharged during the operation of the fire extinguishing system.

In Patent Literature 1, the time to ignite is 10 seconds, compared to the method of igniting by heating as in the present invention, which induces mixed-ignition of the energy source. Excellent stability against heat and shock has a low probability of malfunction and has a high reliability effect.

Patent Literature 2 uses dicyandiamide as an epoxy resin curing agent, and dicyandiamide is used in a solid state to be molded (solidified) when a relatively large amount is used. It takes longer time, and the dicyandiamide has a cyan group, which causes a problem that cyanide gas, which is a toxic gas, is generated during pyrolysis, and the amount of aerosol generated due to the amount of resin and hardener cannot increase the composition ratio of potassium nitrate. Less digestive power is less. However, the present invention has a large amount of generation of aerosols compared to the prior art has excellent digestive power, and has an excellent effect on stability against heat.

Therefore, in particular, places where vibrations are high, such as oils and electric fires, in which water cannot be used, for example, various electrical panels, art galleries, libraries, computer rooms, mobile communication facilities, expensive electronic equipment, ships, and electronic equipment of factories. It can be usefully applied as a fire extinguishing agent for solid aerosol fire extinguishing devices used in high temperature and high humidity places, such as an assembly plant, an electric room, especially a fishing vessel engine room, an underground cavity, an electric switchboard, and a place where the temperature continuously increases. .

Figure 1 is a longitudinal cross-sectional view of the starting portion for a solid aerosol fire extinguishing device
2 is an explanatory view showing a solid aerosol fire extinguishing device equipped with a fire extinguishing composition and a starting unit for a solid aerosol fire extinguishing device of the present invention;

The present invention relates to a solid aerosol composition for fire extinguishing, which is used in a solid aerosol fire extinguishing apparatus having a driving element including a fire extinguishing agent which is heated at high pressure and high pressure by a heating heating method, the composition comprising potassium nitrate, potassium permanganate, It consists of combustible metal powder and epoxy resin.

Hereinafter, before explaining the configuration of the present invention in more detail, first, the structure of the solid aerosol fire extinguishing device filled with the solid aerosol fire extinguishing composition of the present invention and the starter operated as a driving element of the fire extinguishing device will be described.

The starting unit 100 for the solid aerosol fire extinguishing device, as shown in Figure 1 and the housing 110 is formed in the through hole 111 is stepped in the axial direction and fastened to the upper housing tube of the solid aerosol fire extinguishing device; And the heating part 120 seated in the stepped through hole 111 and the axial through hole 111 formed in the housing 110 on the side of the housing tube of the fire extinguishing device. And a cylinder 130 having an acceleration hole 131 penetrating in the axial direction from the outer circumferential surface thereof, and a predetermined length is inserted in the axial direction of the cylinder 130 so that the end thereof is in close contact with the heating unit 120. In addition to being formed in a pipe shape, the other end of the inner cylinder 140 includes a gas acceleration outlet 141 having a smaller diameter, and the inner cylinder 140 to be in close contact with the gas acceleration outlet 141 and the heating part 120. Filled primary solid aerosol extinguishing agents ( 150 and a secondary solid aerosol extinguishing agent 160 spaced apart from the lower portion of the inner cylinder 140 by passing through the acceleration hole 131 at the lower portion of the cylinder 130.

Here, the heating part 120 includes an insulating material 121 such as an epoxy and a backlight seated in the through hole 111, a terminal 122 formed and fixed by the insulating material, and a heating connected to the terminal. The coil 123 has a structure.

When the insulating material 121 is supplied to the terminal 122 in the state seated in the axial direction on the cylinder stopper (111b) heating coil 123 is heated to heat the primary solid aerosol extinguishing agent 150 It is made of gas at high temperature and pressure.

Therefore, since the solid aerosol fire extinguishing device 200 does not use the ignition jade or the ignition agent in the starter 100, no physical property change due to heat is generated even at a high temperature place, so that the fire extinguishing device can be stably started.

That is, when the power is supplied to the heating unit 120 is heated to heat the first solid aerosol extinguishing agent 150 to generate a gas of high temperature and high pressure, the generated gas is formed in the lower portion of the inner cylinder 140 The gas is accelerated and discharged to the gas acceleration outlet 141 and the gas is discharged to the space where the gas acceleration outlet 141 and the secondary solid aerosol extinguishing agent 160 are separated by the high temperature and high pressure of the primary solid aerosol extinguishing agent 150. While activated, the secondary solid aerosol extinguishing agent 160 is heated to a high temperature and high pressure to make a digestive gas.

The gasified secondary solid aerosol extinguishing agent 160 is installed inside the housing tube 210 shown in FIG. 2 while being discharged to the acceleration hole 131 and is located above the coolant 230. The third solid aerosol extinguishing composition 220 corresponding to the solid aerosol extinguishing composition is discharged toward the third solid aerosol extinguishing composition 220 to be gasified at high temperature and high pressure to be discharged to the outside of the housing tube 210. .

The present invention relates to a fire-extinguishing solid aerosol composition used in a solid aerosol fire extinguishing device consisting of potassium nitrate, potassium permanganate, magnesium powder and epoxy resin, the fire extinguishing agent is a fire extinguishing agent which is gasified at a high temperature and high pressure by heating heating method The starting part to be included is a drive element.

Hereinafter, the configuration of the present invention will be described in more detail.

In the present invention, the potassium nitrate serves as a powerful oxidizing agent to pyrolyze at high temperature (over 400 ° C.) to release oxygen to smoothly combust the combustible material in the closed fire extinguishing device. Here, the combustible material means a combustible metal powder and an epoxy resin included in the extinguishing agent composition.

2KNO3 → 2KNO2 + O2 ↑ (at temperatures above 400 ℃)

In addition, when the combustion of the combustible material is completely burned in the fire extinguishing device, when the internal temperature of the fire extinguishing device rises to about 1000 ° C. or more, the potassium nitrate is thermally decomposed to rapidly generate potassium radicals (K?). It reacts with the OH radical (OH?) Generated during the combustion reaction of the fire target material and breaks the chain reaction ring to act as a fire extinguishing agent.

The potassium nitrate may be included in 60 to 90% by weight based on the total weight of the composition, preferably 75 to 90% by weight, more preferably 77 to 87% by weight. When the potassium salt oxidant is included in such a content range, it can be expected to improve the extinguishing performance without inhibiting the moldability and strength to a solid.

In the present invention, the potassium permanganate is thermally decomposed at a temperature lower than 240 ° C., which is relatively lower than that of potassium nitrate, and generates oxygen and manganese dioxide in a fire extinguishing system to help complete combustion of combustible materials (flammable metal powder and epoxy resin), and in particular, Manganese dioxide produced in the decomposition process serves to significantly increase the combustion efficiency by lowering the thermal decomposition temperature of the potassium nitrate oxidant and increasing the decomposition rate.

2KMnO4 → K2MnO4 + MnO2 + O2 ↑ (at 240 ℃)

The potassium permanganate may be included in 1 to 10% by weight based on the total weight of the composition, preferably 1 to 5% by weight, more preferably 1 to 3% by weight. In this content range, an appropriate combustion rate can be expected, and if it exceeds 10% by weight, there is no significant change in the combustion rate.

In the present invention, the composition may include an oxidizing agent such as potassium perchlorate, potassium carbonate, potassium nitrite, potassium dichromate, potassium citrate, potassium bicarbonate, sodium nitrate, sodium bicarbonate, ammonium nitrate, ammonium perchlorate, barium nitrate and cesium nitrate. It may further comprise together with potassium nitrate within the weight percent range of the potassium nitrate.

In the present invention, the combustible metal powder has a large calorific value during combustion and a very high combustion rate, and generates a flame to thermally extinguish the extinguishing agent by raising the internal temperature of the extinguisher to thermally decompose the extinguishing agent component to a large amount of potassium radicals as a extinguishing component. It creates a role.

As the combustible metal powder, magnesium, aluminum, titanium, zirconium, potassium, zinc, cesium and lithium may be used alone or in combination, and preferably magnesium. The combustible metal is advantageously in powder form in terms of heat of combustion and rate of combustion.

The combustible metal of the present invention is 1 to 10% by weight, preferably 2 to 10% by weight, more preferably 3 to 6% by weight based on the total weight of the composition. Appropriate combustion rates can be expected in this content range, and above 10% by weight does not significantly change the combustion rate.

In the present invention, the epoxy resin helps to process the extinguishing agent composition in a certain form and has an excellent compressive strength.

The epoxy resin may be included in 5 to 25% by weight based on the total weight of the composition, preferably 6 to 20% by weight, more preferably 9 to 14% by weight. In this content range, the extinguishing agent composition can be molded into solids, maintain appropriate strength, and expect a moderate level of combustion rate.

The composition may further include a phenol resin, melamine resin, unsaturated polyester resin, silicon resin and combinations thereof with the epoxy resin within the weight percent range of the epoxy resin at a level that does not lower the compressive strength when molded into a solid material. Can be.

The composition of the present invention may have a high compressive strength, preferably 500 kgf / cm ² or more, and more preferably 500 ~ 1000 kgf / cm ² when molded in the form of a solid. The composition of the present invention is characterized by having such a compressive strength to increase the stability against external impact or vibration.

Each component constituting the composition of the present invention is composed of 60 to 90% by weight of potassium nitrate, 1 to 10% by weight of potassium permanganate, 1 to 10% by weight of combustible metal powder, and 5 to 25% by weight of epoxy resin. It consists of 75 to 90% by weight of potassium nitrate, 1 to 5% by weight of potassium permanganate, 2 to 10% by weight of combustible metal powder, and 6 to 20% by weight of epoxy resin. More preferably, it may be composed of 77 to 87% by weight of potassium nitrate, 1 to 3% by weight of potassium permanganate, 3 to 6% by weight of flammable metal, and 9 to 14% by weight of thermosetting resin. In this content range, the compressive strength is enhanced when molded into a solid material, and exhibits an optimum extinguishing efficiency through proper combustion performance.

The composition of the present invention includes potassium nitrate, potassium permanganate oxidant and combustible metal powder at the same time, so that the efficiency of extinguishing components, ie, potassium radicals, is high through the generation of high-temperature, high-pressure gas in the fire extinguishing apparatus without using a cotton swab or an electric ignition initiator. It has excellent extinguishing performance. In addition, when molded in the form of a solid with the epoxy resin while maximizing the content of potassium nitrate is stable to heat, and has a high compressive strength against impact or vibration.

In the present invention, the potassium nitrate, potassium permanganate, combustible metal powder may have a particle size of 30 ~ 200㎛, preferably 30 ~ 100㎛. Digestion performance is further enhanced in this particle size range.

The composition is preferably in the form of a solid which is formed by curing at an appropriate temperature and pressure after mixing the powdered potassium nitrate, potassium permanganate, combustible metal powder and epoxy resin. The composition may be molded into such a solid form and then filled and used in a solid aerosol fire extinguishing device.

The present invention comprises the steps of mixing the potassium nitrate, potassium permanganate, combustible metal powder and epoxy resin into a molding mold; It is pressed to a pressure of 100 to 300 kg / cm ² , and heated to 80 to 100 ℃ to form a solid form; relates to a method for producing a fire extinguishing composition comprising a.

Specifically, the preparation method grinds potassium nitrate and potassium permanganate oxidizing agent, mixes a combustible metal and a thermosetting resin in a powder state, puts them into a mold for molding, and presses at a pressure of 100 to 300 kg / cm ² . It can be carried out by curing for 2 to 3 hours at 80 to 100 ℃.

[Example]

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

Examples 1-3, Comparative Examples 1-3 Fire extinguishing agent manufacture

Examples 1-3 and Comparative Example 1

Potassium nitrate and potassium permanganate were ground, mixed with combustible metal powder and epoxy resin, put into a molding mold, pressurized at a pressure of 200 kg / cm ² , and cured at 80 ° C. for 2 hours to prepare a extinguishing composition in the form of a solid. Prepared. The content of each component was adjusted as shown in Table 1 below. Each fire extinguishing composition was filled into a solid aerosol fire extinguisher to prepare a fire extinguisher. The weight of each fire extinguishing composition filled in the fire extinguishing device was equal to 100 g.

(Unit: weight%) division Example 1 Example 2 Example 3 Comparative Example 1 Potassium Nitrate 81 83 81 84 Potassium permanganate 3 2 3 - Combustible Metal Powder Mg 6 Mg 5 Al 6 Mg 6 Epoxy resin 10 10 10 10

Comparative Example 2

Extinguishing composition was prepared in the same manner as in Example 1, except that phenol resin was used instead of epoxy resin in Example 1.

Comparative Example 3

A commercial solid aerosol fire extinguisher was prepared.

Test example. Digestive Performance Test

Extinguishing performance was evaluated for the fire extinguishers of Examples 1 to 3 and Comparative Examples 1 to 3. The results are shown in Table 2 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Burning speed (mm / s) 1.6 1.4 1.5 1.2 1.3 1.2 Combustion temperature (℃) 1086 1102 1099 1274 1176 1205 Extinguishing capacity (g / m ³ ) 55 57 59 66 62 65 Compressive strength (kgf / cm ² ) 520 525 519 510 480 460

100: starting unit for the solid aerosol fire extinguishing device
110: Housing
111: Through hole
120: heating unit
121: insulation material
122: electric coil
130: cylinder
131: acceleration hole
140: inner cylinder
141: gas acceleration outlet
150: primary solid aerosol extinguishing agent
160: secondary solid aerosol extinguishing agent
200: solid aerosol fire extinguishing device
210: housing tube
220: tertiary solid aerosol digestion composition (extinguishing composition of the present invention)
230: coolant

Claims (8)

In a solid aerosol composition for fire extinguishing, which is used in a solid aerosol fire extinguishing apparatus having a driving part including a fire extinguishing agent which is gasified by a high temperature and high pressure gas by a heating heating method,
It is characterized by consisting of 60 to 90% by weight of potassium nitrate, 1 to 10% by weight of potassium permanganate, 1 to 10% by weight of combustible metal powder, and 5 to 25% by weight of epoxy resin. A solid aerosol extinguishing composition to be gasified.
The method of claim 1,
Combustible metal powder is a solid aerosol fire extinguishing composition, characterized in that at least one selected from the group consisting of magnesium, aluminum, titanium, zirconium, potassium, zinc, cesium and lithium.
The method of claim 1,
At least one oxidizing agent selected from the group consisting of potassium perchlorate, potassium carbonate, potassium nitrite, potassium bichromate, potassium citrate, potassium bicarbonate, sodium nitrate, sodium bicarbonate, ammonium nitrate, ammonium perchlorate, barium nitrate and cesium nitrate Solid aerosol digestive composition, characterized in that it further comprises in combination with potassium nitrate in the range of weight percent or less.
The method of claim 1,
Solid resin characterized in that it further comprises a resin selected from the group consisting of phenol resin, melamine resin, unsaturated polyester resin, silicon resin and combinations thereof with epoxy resin within the range of 3% by weight or less of the epoxy resin. Aerosol Extinguishing Composition.
The method of claim 1,
Potassium nitrate, potassium permanganate, combustible metal powder is a solid aerosol fire extinguishing composition, characterized in that the particle size of 30 ~ 200㎛.
The method of claim 1,
The composition is a solid, solid aerosol fire extinguishing composition, characterized in that it has a compressive strength in the range of 500 ~ 1000 kgf / cm ² .
Pulverizing potassium nitrate and potassium permanganate, mixing them with combustible metal powder and epoxy resin, putting them into a molding mold, and pressing them at a pressure of 100 to 300 kg / cm ² and warming them to 80 to 100 ° C. to mold them into solids. Method for producing a solid aerosol fire extinguishing composition according to claim 1 comprising a
A solid aerosol fire extinguishing device filled with the solid aerosol fire extinguishing composition according to claim 1.

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