CN107670215B - Hot aerosol fire extinguishing agent and preparation method thereof - Google Patents
Hot aerosol fire extinguishing agent and preparation method thereof Download PDFInfo
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- CN107670215B CN107670215B CN201710905046.1A CN201710905046A CN107670215B CN 107670215 B CN107670215 B CN 107670215B CN 201710905046 A CN201710905046 A CN 201710905046A CN 107670215 B CN107670215 B CN 107670215B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0092—Gaseous extinguishing substances, e.g. liquefied gases, carbon dioxide snow
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0007—Solid extinguishing substances
- A62D1/0014—Powders; Granules
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
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Abstract
The invention discloses a hot aerosol fire extinguishing agent and a preparation method thereof, wherein the hot aerosol fire extinguishing agent comprises the following components in parts by weight: 15% of calcium metasilicate, 12% of calcium selenate, 2% of xylose, 20% of carbon powder, 2% of nano carboxymethyl cellulose, 21% of calcium carbonate, 22% of basic zinc carbonate, 3% of ethylene diamine tetraacetic acid and 3% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1: 1; and a method for preparing the same. The components of the aerosol fire extinguishing agent have obvious synergistic effect, so that the aerosol fire extinguishing agent has good fire extinguishing capability and fire extinguishing efficiency on the whole, has the advantages of small dosage, high fire extinguishing speed, high fire extinguishing efficiency and the like, and is particularly suitable for extinguishing oil fire sources.
Description
Technical Field
The invention relates to the field of fire extinguishing of oil source fire sources, in particular to a hot aerosol fire extinguishing agent and a preparation method thereof.
Background
Currently, the fire extinguishing agents generally used can be roughly classified into the following categories: the water-based fire extinguishing agent, the gas fire extinguishing agent, the powder fire extinguishing agent, the aerosol fire extinguishing agent and the halon fire extinguishing agent have different application ranges and different performance indexes, wherein: the Halon fire extinguishing agent has the characteristics of good fire extinguishing effect and high fire extinguishing efficiency.
However, since 1987, various countries have restrictions of Montreal protocol on the destruction of ozone substances, the production and use of the Halon fire extinguishing agent are gradually eliminated, and the national government has stopped producing 1211 and 1301 fire extinguishing agents in 2010.
Under the background that the Halon fire extinguishing agent is eliminated, other fire extinguishing agents are developed and applied more widely, and the principle of the water-based fire extinguishing agent mainly achieves the purpose of fire extinguishing through the cooling and suffocation of fine water mist and the heat radiation isolation; the gas fire extinguishing agent mainly achieves the purpose of extinguishing fire by spraying inert gas to reduce the oxygen content in a fire area; the main principle of the powder extinguishing agent is that powder is sprayed under the action of high-pressure gas, free radicals in flame are consumed, inert gas is generated, and the like, so that the aim of extinguishing fire is fulfilled. However, these fire extinguishing agents require the existence of a high-pressure environment during the use, which results in large equipment volume and physical explosion risk during storage and use, and the risk of the gas fire extinguishing system is analyzed in the document "safety analysis of gas fire extinguishing system".
The existing aerosol fire extinguishing agents can be mainly divided into S type and K type, and the fire extinguishing agents mainly utilize inert gases, free radicals and the like released by redox reaction to act on a fire area, and achieve the purpose of fire extinguishing through the suffocation of the inert gases and the chemical reaction of the free radicals. The defects are mainly shown as follows: the heat release of the oxidation-reduction reaction is large, so that the temperature of the structural nozzle of the aerosol fire extinguishing device is high; some aerosol fire extinguishing agents generate aerosol with low efficiency and long time, which is not beneficial to timely controlling initial fire.
Accordingly, the prior art is subject to further improvement and development.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a hot aerosol fire extinguishing agent and a preparation method thereof, which can improve the fire extinguishing efficiency on the premise of reducing the cost.
In order to solve the technical problems, the technical scheme of the invention comprises the following steps:
a hot aerosol fire extinguishing agent comprises the following components in percentage by weight: 15% of calcium metasilicate, 12% of calcium selenate, 2% of xylose, 20% of carbon powder, 2% of nano carboxymethyl cellulose, 21% of calcium carbonate, 22% of basic zinc carbonate, 3% of ethylene diamine tetraacetic acid and 3% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1:1.
a hot aerosol fire extinguishing agent comprises the following components in percentage by weight: 17% of calcium metasilicate, 13% of calcium selenate, 3% of xylose, 18% of carbon powder, 3% of nano carboxymethyl cellulose, 19% of calcium carbonate, 20% of basic zinc carbonate, 2% of ethylene diamine tetraacetic acid and 5% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1: 2.
a hot aerosol fire extinguishing agent comprises the following components in percentage by weight: 14% of calcium metasilicate, 14% of calcium selenate, 4% of xylose, 17% of carbon powder, 2% of nano carboxymethyl cellulose, 20% of calcium carbonate, 21% of basic zinc carbonate, 4% of ethylene diamine tetraacetic acid and 4% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1: 1.5.
a method of making the hot aerosol fire extinguishing agent comprising the steps of:
A. weighing the raw material components according to corresponding proportions, and grinding the raw material components into powder by using a grinder respectively; then, sieving with a 500-mesh sieve, and collecting sieved powder for later use;
B. respectively adding the collected and sieved powder into a material tray of a rotary granulator, and adding 1/3 of the total amount of epoxy resin into a liquid storage tank of the rotary granulator; then, starting the rotary granulator, starting a guniting pump of the rotary granulator after the materials are fully and uniformly mixed, and granulating to obtain the materials;
C. drying the materials in an explosion-proof oven, heating the explosion-proof oven from room temperature to 40 ℃ at the speed of 15 ℃/h, and then drying at constant temperature of 40 ℃ until the water content of the materials is less than or equal to 0.8% to obtain dry materials;
D. putting the obtained dry material into a stirrer, adding the rest epoxy resin into dioctyl phthalate for dilution, adding the diluted epoxy resin into the stirrer, and uniformly stirring to obtain a semi-finished product;
E. and (3) putting the prepared semi-finished product into a cartridge case, placing the cartridge case on a press workbench, and compacting under the pressure of 5MPa to obtain the aerosol fire extinguishing agent.
The preparation method, wherein the step a further comprises: and mixing the screened materials collected in the screening pan into the solid raw materials of the next batch, and filling the solid raw materials back to the mill for grinding.
The preparation method, wherein the step B specifically further comprises: the air injection pressure of the rotary granulator is 0.5Mpa, and the rotating speed of a guniting pump is 5-25 r.min-1The rotating speed of the feeding machine is 5-25 r.min-1The dilution zero density is 0.64g/ml, and the angle of repose is 32 degrees; the grain diameter control index of the granulation is that the yield of the final 28-32 mesh material is more than 90 percent.
The preparation method, wherein, in the step E, the inner diameter of the cartridge is 40mm, the height is 100mm, and the charging amount is 50-100 g.
The hot aerosol fire extinguishing agent and the preparation method thereof provided by the invention have the advantages of small dosage, high fire extinguishing speed, high fire extinguishing efficiency and the like, are particularly suitable for extinguishing oil fire sources, and contain an oxidant, a combustible agent, a combustion regulator, an additive, a modifier and an adhesive; wherein, the oxidant is calcium selenate, the combustible agent is xylose and carbon powder, the combustion regulator is nano carboxymethyl cellulose, the additive is calcium carbonate and basic zinc carbonate, the modifier is ethylene diamine tetraacetic acid, and the adhesive is epoxy resin.
Calcium carbonate and basic zinc carbonate in the composition are heated and decomposed at high temperature to release a large amount of carbon dioxide, and the carbon dioxide is used for extinguishing fire; in the process of thermal decomposition of calcium carbonate and basic zinc carbonate (the calcium carbonate and the basic zinc carbonate are thermally decomposed, one part is carried out in the aerosol fire extinguishing device, and the other part is carried out at a fire ignition point after being sprayed out), a large amount of heat needs to be absorbed, so that the flame temperature at the fire ignition point can be reduced, fire extinguishment is assisted, the temperature of a nozzle of the aerosol fire extinguishing device can be reduced, the safety of a user operating the fire extinguishing device is effectively ensured, and convenience and safety in use are brought. The calcium carbonate and the basic zinc carbonate are subjected to a thermal decomposition process as described above, and the ignition point temperature is reduced due to heat absorption, which further reduces the heat quantity for gasifying combustible molecules and cracking the gasified combustible molecules into free radicals in the combustion process of the combustible, so that the speed of the ignition point (continuous) combustion reaction is inhibited to some extent.
In addition, calcium oxide generated by decomposition of calcium carbonate and zinc oxide generated by decomposition of basic zinc carbonate can chemically react with carbon in the combustion product to generate carbon dioxide. Namely, combustible components (carbon powder) in the combustion products are converted into incombustible inert gas (carbon dioxide), so that the combustion speed of the combustion products is delayed, the oxygen content in a combustion space is reduced, and the fire extinguishing speed and efficiency are improved. In addition, during the process of combustion on fire (i.e., during the process of maintaining the combustion reaction continuously), the combustion products are continuously cracked to generate a large amount of active groups such as. H,. O,. OH, etc., which are essential for the combustion to continue. On the other hand, calcium oxide and zinc oxide generated by decomposition of calcium carbonate and basic zinc carbonate at high temperature react with the above-mentioned active groups (i.e., active groups such as. H,. O,. OH) respectively, thereby partially consuming the active groups, suppressing the reaction between the active groups, and further interrupting the combustion chain and suppressing continuation of flame combustion.
The oxidant and the reducing agent in the composition are ignited by an electric starter of the aerosol fire extinguishing device in the aerosol fire extinguishing device, a violent redox reaction is generated, a large amount of heat is released, calcium metasilicate, calcium selenate, xylose and carbon powder in the composition are not completely combusted, a large amount of smoke is generated, and the smoke and the air are mixed to form aerosol; the nanometer carboxymethyl cellulose component in the composition is mainly used as a combustion regulator due to the low flammability and ignition point and the large specific surface area. I.e., to ignite/accelerate the combustion rate of the combustible components of the composition to promote rapid formation of a large quantity of aerosol in the container during the initial stages of operation of the aerosol fire extinguishing apparatus. In the hot aerosol fire extinguishing agent composition, inorganic oxide solid particles generated by decomposition at high temperature cover the surface of a fired object, further play a role in isolating oxygen on the surface of the fired object, and accelerate the extinguishing process of flame due to oxygen deficiency suffocation.
Detailed Description
The invention provides a hot aerosol fire extinguishing agent and a preparation method thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and more clear. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A hot aerosol fire extinguishing agent comprises the following components in percentage by weight: 15% of calcium metasilicate, 12% of calcium selenate, 2% of xylose, 20% of carbon powder, 2% of nano carboxymethyl cellulose, 21% of calcium carbonate, 22% of basic zinc carbonate, 3% of ethylene diamine tetraacetic acid and 3% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1:1.
a hot aerosol fire extinguishing agent comprises the following components in percentage by weight: 17% of calcium metasilicate, 13% of calcium selenate, 3% of xylose, 18% of carbon powder, 3% of nano carboxymethyl cellulose, 19% of calcium carbonate, 20% of basic zinc carbonate, 2% of ethylene diamine tetraacetic acid and 5% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1: 2.
a hot aerosol fire extinguishing agent comprises the following components in percentage by weight: 14% of calcium metasilicate, 14% of calcium selenate, 4% of xylose, 17% of carbon powder, 2% of nano carboxymethyl cellulose, 20% of calcium carbonate, 21% of basic zinc carbonate, 4% of ethylene diamine tetraacetic acid and 4% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1: 1.5.
the invention also provides a method for preparing the hot aerosol fire extinguishing agent, which comprises the following steps:
step one, weighing the raw material components according to corresponding proportions, and grinding the raw material components into powder by using a grinding machine respectively; then, sieving with a 500-mesh sieve, and collecting sieved powder for later use;
step two, respectively adding the collected and sieved powder into a material tray of a rotary granulator, and adding 1/3 of the total amount of the epoxy resin into a liquid storage tank of the rotary granulator; then, starting the rotary granulator, starting a guniting pump of the rotary granulator after the materials are fully and uniformly mixed, and granulating to obtain the materials;
drying the materials in an explosion-proof oven, heating the explosion-proof oven from room temperature to 40 ℃ at the speed of 15 ℃/h, and then drying at constant temperature of 40 ℃ until the water content of the materials is less than or equal to 0.8% to obtain dry materials;
step four, putting the obtained dry material into a stirrer, adding the rest epoxy resin into the stirrer, diluting the epoxy resin by dioctyl phthalate, adding the diluted epoxy resin into the stirrer, and uniformly stirring to obtain a semi-finished product;
and step five, filling the prepared semi-finished product into a cartridge, placing the cartridge on a workbench of a press, and compacting under the pressure of 5MPa to obtain the aerosol fire extinguishing agent, wherein preferably, the cartridge has the inner diameter of 40mm, the height of 100mm and the loading of 50-100 g.
And the first step specifically further comprises: and mixing the screened materials collected in the screening pan into the solid raw materials of the next batch, and filling the solid raw materials back to the mill for grinding. The second step specifically further comprises: the air injection pressure of the rotary granulator is 0.5Mpa, and the rotating speed of a guniting pump is 5-25 r.min-1The rotating speed of the feeding machine is 5-25 r.min-1The dilution zero density is 0.64g/ml, and the angle of repose is 32 degrees; the particle size control index of the granulation is the highestThe yield of the final 28-32 mesh material is more than 90 percent. The inner diameter of the cartridge in the fifth step is 40mm, the height is 100mm, and the charging amount is 50-100 g.
In order to further describe the present invention, the following examples are given by way of illustration and not by way of limitation. The following examples, fire extinguishing application experiments for the hot aerosol fire extinguishing agent products, all employ GA 499.1-2010 "aerosol fire extinguishing systems" part 1: the hot aerosol fire extinguishing apparatus was carried out in the prescribed manner, and the amount of fire extinguishing agent used was 50 g.
Example 1
The hot aerosol fire extinguishing agent comprises the following raw materials: according to the mass fraction, 15% of calcium metasilicate, 12% of calcium selenate, 2% of xylose, 20% of carbon powder, 2% of nano carboxymethyl cellulose, 21% of calcium carbonate, 22% of basic zinc carbonate, 3% of ethylene diamine tetraacetic acid and 3% of epoxy resin (according to the mass ratio of 1:1, dioctyl phthalate is added to be used as a diluent for dilution).
The product (with the cartridge) is loaded into a small-sized aerosol fire-extinguishing device, and is loaded into an electric starter (without adding coolant or compressing gas) with an implementation area of 0.1m2Fire extinguishing tests on oil pans the fuel was commercial grade n-heptane. The mass of the product used in the fire extinguishing test was 50g, and the test results are shown in Table 1.
Example 2
The hot aerosol fire extinguishing agent comprises the following raw materials: according to the mass fraction, 17% of calcium metasilicate, 14% of calcium selenate, 2% of xylose, 20% of carbon powder, 3 parts of nano carboxymethyl cellulose, 18% of calcium carbonate, 19% of basic zinc carbonate, 3% of ethylene diamine tetraacetic acid and 4% of epoxy resin (according to the mass ratio of 1:3, dioctyl phthalate is added to be used as a diluent for dilution).
The product (with the cartridge) is loaded into a small-sized aerosol fire-extinguishing device, and is loaded into an electric starter (without adding coolant or compressing gas) with an implementation area of 0.1m2Fire extinguishing tests on oil pans the fuel was commercial grade n-heptane. The mass of the product used in the fire extinguishing test was 50g, and the test results are shown in Table 1.
Example 3
The hot aerosol fire extinguishing agent comprises the following raw materials: according to the mass fraction, 17% of calcium metasilicate, 13% of calcium selenate, 3% of xylose, 18% of carbon powder, 3% of nano carboxymethyl cellulose, 19% of calcium carbonate, 20% of basic zinc carbonate, 2% of ethylene diamine tetraacetic acid and 5% of epoxy resin (according to the mass ratio of 1:2, dioctyl phthalate is added to be used as a diluent for dilution).
The product (with the cartridge) is loaded into a small-sized aerosol fire-extinguishing device, and is loaded into an electric starter (without adding coolant or compressing gas) with an implementation area of 0.1m2Fire extinguishing tests on oil pans the fuel was commercial grade n-heptane. The mass of the product used in the fire extinguishing test was 50g, and the test results are shown in Table 1.
Example 4
The hot aerosol fire extinguishing agent comprises the following raw materials: according to the mass fraction, 14% of calcium metasilicate, 14% of calcium selenate, 4% of xylose, 17% of carbon powder, 2% of nano carboxymethyl cellulose, 20% of calcium carbonate, 21% of basic zinc carbonate, 4% of ethylene diamine tetraacetic acid and 4% of epoxy resin (according to the mass ratio of 1:1.5, dioctyl phthalate is added to be used as a diluent for dilution).
The product (with the cartridge) is loaded into a small-sized aerosol fire-extinguishing device, and is loaded into an electric starter (without adding coolant or compressing gas) with an implementation area of 0.1m2Fire extinguishing tests on oil pans the fuel was commercial grade n-heptane. The mass of the product used in the fire extinguishing test was 50g, and the test results are shown in Table 1 below.
Comparative example 1
The fire extinguishing agent is a commercially available S-type fire extinguishing agent, and the mass used in the fire extinguishing experiment is 50 g.
Comparative example 2
The fire extinguishing agent is a K type fire extinguishing agent sold in the market, and the mass used in the fire extinguishing experiment is 50 g.
Table 1 is a table showing the results of comparative tests for fire extinguishing conducted in examples 1 to 4 and comparative examples 1 and 2.
TABLE 1
As can be seen from the above Table 1, the success rates of fire extinguishment of the examples 1 to 4 are all 100%, which is higher than the same type of commercial K-type fire extinguishing agent and commercial S-type fire extinguishing agent (average 62.5%).
Examples 1-4 the average duration of aerosol spray required to extinguish a fire was about 13.2 seconds, and the average duration of aerosol spray required to extinguish a fire with the same type of commercial fire extinguishing agent of type K and commercial fire extinguishing agent of type S was about 19.1 seconds. It is shown that the duration of the aerosol spray required for extinguishing the fire in examples 1 to 4 is reduced by about 30.9% (mean value).
The specific fire extinguishing mechanism of the invention is as follows:
calcium carbonate and basic zinc carbonate in the composition are heated and decomposed at high temperature to release a large amount of carbon dioxide, and the carbon dioxide is used for extinguishing fire; in the process of thermal decomposition of calcium carbonate and basic zinc carbonate (the calcium carbonate and the basic zinc carbonate are thermally decomposed, one part is carried out in the aerosol fire extinguishing device, and the other part is carried out at a fire ignition point after being sprayed out), a large amount of heat needs to be absorbed, so that the flame temperature at the fire ignition point can be reduced, fire extinguishment is assisted, the temperature of a nozzle of the aerosol fire extinguishing device can be reduced, the safety of a user operating the fire extinguishing device is effectively ensured, and convenience and safety in use are brought. The calcium carbonate and the basic zinc carbonate are subjected to a thermal decomposition process as described above, and the ignition point temperature is reduced due to heat absorption, which further reduces the heat quantity for gasifying combustible molecules and cracking the gasified combustible molecules into free radicals in the combustion process of the combustible, so that the speed of the ignition point (continuous) combustion reaction is inhibited to some extent.
In addition, calcium oxide generated by decomposition of calcium carbonate and zinc oxide generated by decomposition of basic zinc carbonate can chemically react with carbon in the combustion product to generate carbon dioxide. Namely, combustible components (carbon powder) in the combustion products are converted into incombustible inert gas (carbon dioxide), so that the combustion speed of the combustion products is delayed, the oxygen content in a combustion space is reduced, and the fire extinguishing speed and efficiency are improved. In addition, during the process of combustion on fire (i.e., during the process of maintaining the combustion reaction continuously), the combustion products are continuously cracked to generate a large amount of active groups such as. H,. O,. OH, etc., which are essential for the combustion to continue. On the other hand, calcium oxide and zinc oxide generated by decomposition of calcium carbonate and basic zinc carbonate at high temperature react with the above-mentioned active groups (i.e., active groups such as. H,. O,. OH) respectively, thereby partially consuming the active groups, suppressing the reaction between the active groups, and further interrupting the combustion chain and suppressing continuation of flame combustion.
The oxidant and the reducing agent in the composition are ignited by an electric starter of the aerosol fire extinguishing device in the aerosol fire extinguishing device, a violent redox reaction is generated, a large amount of heat is released, calcium metasilicate, calcium selenate, xylose and carbon powder in the composition are not completely combusted, a large amount of smoke is generated, and the smoke and the air are mixed to form aerosol; the nanometer carboxymethyl cellulose component in the composition is mainly used as a combustion regulator due to the low flammability and ignition point and the large specific surface area. I.e., to ignite/accelerate the combustion rate of the combustible components of the composition to promote rapid formation of a large quantity of aerosol in the container during the initial stages of operation of the aerosol fire extinguishing apparatus. In the hot aerosol fire extinguishing agent composition, inorganic oxide solid particles generated by decomposition at high temperature cover the surface of a fired object, further play a role in isolating oxygen on the surface of the fired object, and accelerate the extinguishing process of flame due to oxygen deficiency suffocation.
As can be readily understood from the analyses of table 1 and examples 1 to 4, the hot aerosol fire extinguishing agent according to the above-described technical aspect can be used directly (combustion generates gas in the device to form a certain pressure) without pressure storage when it is charged into an aerosol fire extinguishing device. This greatly enhances the convenience and safety of the fire extinguishing agent during storage and use, with significant advantages over the conventional similar products of the prior art.
In the above description of the fire extinguishing mechanism of the hot aerosol fire extinguishing agent, the main chemical reaction equations involved are as follows:
CaCO3→CaO+CO2↑
CaO+C→Ca+CO2↑
Ca+·OH→Ca(OH)2
Ca+·O→CaO
Ca(OH)2+·H→H2O+Ca
Ca(OH)2+·OH→H2O+CaO
CaO+·H→Ca(OH)2
Zn2(OH)2CO3→ZnO+CO2↑+H2O
ZnO+C→Zn+CO2↑
Zn+·OH→Zn(OH)2
Zn+·O→ZnO
Zn(OH)2+·H→H2O+Zn
Zn(OH)2+·OH→H2O+ZnO
ZnO+·H→Zn(OH)2。
in conclusion, it can be seen that the components of the hot aerosol fire extinguishing agent in the technical scheme have very obvious functions and effects of 'division of labor and cooperation', and the components have obvious synergistic effects, are matched and mutually promoted, so that the hot aerosol fire extinguishing agent has good fire extinguishing capability and fire extinguishing efficiency on the whole.
The extinguishing efficiency of the hot aerosol extinguishing agent product is obviously higher than that of the same type of commercial K-type extinguishing agent and commercial S-type extinguishing agent products.
It should be understood, however, that the description herein of specific embodiments is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A hot aerosol fire extinguishing agent is characterized by comprising the following components in percentage by weight:
15% of calcium metasilicate, 12% of calcium selenate, 2% of xylose, 20% of carbon powder, 2% of nano carboxymethyl cellulose, 21% of calcium carbonate, 22% of basic zinc carbonate, 3% of ethylene diamine tetraacetic acid and 3% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1:1.
2. a hot aerosol fire extinguishing agent is characterized by comprising the following components in percentage by weight:
17% of calcium metasilicate, 13% of calcium selenate, 3% of xylose, 18% of carbon powder, 3% of nano carboxymethyl cellulose, 19% of calcium carbonate, 20% of basic zinc carbonate, 2% of ethylene diamine tetraacetic acid and 5% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1: 2.
3. a hot aerosol fire extinguishing agent is characterized by comprising the following components in percentage by weight:
14% of calcium metasilicate, 14% of calcium selenate, 4% of xylose, 17% of carbon powder, 2% of nano carboxymethyl cellulose, 20% of calcium carbonate, 21% of basic zinc carbonate, 4% of ethylene diamine tetraacetic acid and 4% of epoxy resin, wherein the epoxy resin is diluted by using dioctyl phthalate as a diluent before use, and the mass ratio of the epoxy resin to the dioctyl phthalate diluent is 1: 1.5.
4. a process for the preparation of a hot aerosol fire extinguishing agent according to any one of claims 1 to 3, comprising the steps of:
A. weighing the raw material components according to corresponding proportions, and grinding the raw material components into powder by using a grinder respectively; then, sieving with a 500-mesh sieve, and collecting sieved powder for later use;
B. respectively adding the collected and sieved powder into a material tray of a rotary granulator, and adding 1/3 of the total amount of epoxy resin into a liquid storage tank of the rotary granulator; then, starting the rotary granulator, starting a guniting pump of the rotary granulator after the materials are fully and uniformly mixed, and granulating to obtain the materials;
C. drying the materials in an explosion-proof oven, heating the explosion-proof oven from room temperature to 40 ℃ at the speed of 15 ℃/h, and then drying at constant temperature of 40 ℃ until the water content of the materials is less than or equal to 0.8% to obtain dry materials;
D. putting the obtained dry material into a stirrer, adding the rest diluted epoxy resin into the stirrer, and uniformly stirring to obtain a semi-finished product;
E. and (3) putting the prepared semi-finished product into a cartridge case, placing the cartridge case on a press workbench, and compacting under the pressure of 5MPa to obtain the aerosol fire extinguishing agent.
5. The method according to claim 4, wherein the step A further comprises: and mixing the screened materials collected in the screening pan into the solid raw materials of the next batch, and filling the solid raw materials back to the mill for grinding.
6. The method of claim 4, wherein the cartridge of step E has an inner diameter of 40mm, a height of 100mm and a loading of 50-100 g.
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| CN102179026B (en) * | 2010-09-16 | 2012-06-27 | 陕西坚瑞消防股份有限公司 | Fire extinguishing composition generating extinguishant by pyrolysis |
| CN102225228B (en) * | 2011-04-26 | 2013-01-09 | 杭州华神消防科技有限公司 | Hot aerosol fire extinguishing agent |
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| US20160030789A1 (en) * | 2014-06-06 | 2016-02-04 | GeITech Solutions, Inc. | Colorized fire extinguishing compositions |
| US9861845B2 (en) * | 2014-10-16 | 2018-01-09 | Goodrich Corporation | Combustible fire suppressant aerosol composition |
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