CN111530012A - Preparation method of corrosion-resistant aerosol fire extinguishing agent - Google Patents
Preparation method of corrosion-resistant aerosol fire extinguishing agent Download PDFInfo
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- CN111530012A CN111530012A CN202010347069.7A CN202010347069A CN111530012A CN 111530012 A CN111530012 A CN 111530012A CN 202010347069 A CN202010347069 A CN 202010347069A CN 111530012 A CN111530012 A CN 111530012A
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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
- A62D1/0071—Foams
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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
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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
- A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
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Abstract
The invention relates to a preparation method of an anti-corrosion aerosol fire extinguishing agent, belonging to the technical field of fire extinguishing agent materials. The invention takes potassium nitrate as a main oxidant, aluminum sulfate and sodium bicarbonate as auxiliary oxidants, charcoal as a reducing agent, licorice powder as a foaming agent and glutinous rice powder as a binder to prepare a fire extinguishing agent matrix, and stearic acid is adopted to coat the fire extinguishing agent matrix to prepare the corrosion-resistant aerosol fire extinguishing agent; aluminum sulfate and sodium bicarbonate generate a large amount of carbon dioxide gas after combustion, and generate a plurality of bubbles under the action of licorice powder, the carbon dioxide gas can cover the surface of a fire to isolate air, meanwhile, the carbon dioxide gas is inert gas and does not support combustion, after the aerosol generating agent is sprayed, the products are mainly potassium oxide, carbonate and bicarbonate, the substances are easy to absorb moisture, the substances can react with water to generate strong alkaline solution, and the foam covers electronic metal parts to play an isolating role, so that the products can be prevented from corroding the protected electronic metal parts.
Description
Technical Field
The invention relates to a preparation method of an anti-corrosion aerosol fire extinguishing agent, belonging to the technical field of fire extinguishing agent materials.
Background
The fire disaster is the disaster with the highest occurrence frequency in the living environment of human beings, the occurrence time and the occurrence place are difficult to grasp and predict accurately, and fire extinguishing facilities are required to be installed in any public place specified by the fire-fighting law. For a long time, people have taken various measures to prevent and eliminate fire, and developed various fire extinguishing devices, such as a clear water fire extinguishing agent, a carbon dioxide fire extinguishing agent, a foam fire extinguishing agent, a dry powder fire extinguishing agent and the like. The four fire extinguishing agents, which are well known in the big family, are limited in application by the fire extinguishing mechanism and the fire extinguishing efficiency.
Aerosol in the broad sense refers to a colloidal system with liquid or small solid particles as a dispersoid and air as a dispersion medium. Aerosols in which the liquid substance is a dispersoid and air is a dispersion medium are generally called mists; the small solid particles are dispersoids, the aerosol with air as a dispersion medium is called smoke, and the small solid particles are also called haze when reaching the micron level. In the middle of the last century, aerosol fire extinguishing agent systems were developed, have been paid attention to by researchers for decades, and have been studied in large quantities. The aerosol fire extinguishing system mainly comprises a cold aerosol fire extinguishing agent subsystem and a hot aerosol fire extinguishing agent subsystem, and the latter is the focus of controversial research due to advanced technology and high practical value.
The cold aerosol fire extinguishing agent is one kind of fire extinguishing sol formed by dispersing superfine solid or liquid fire extinguishing particle in gas with mechanical or high area airflow. The fire extinguishing particles applied to cold aerosol fire extinguishing agents at present are prepared by a physical dispersion method or a chemical dispersion method, and the main component is superfine dry powder fire extinguishing agent. The superfine dry powder extinguishing agent is prepared by repeatedly crushing and grinding common dry powder extinguishing agent, and before crushing, certain treatment is needed, grinding aid is added to improve grinding effect, isolating agent is added to improve particle free-running property, and moisture-proof agent is added to prevent moisture absorption and blocking. The superfine dry powder extinguishing agent uses high-pressure inert gas as a power source to release fine particles into the air to form aerosol. Before the cold aerosol fire extinguishing agent is released, the dynamic gas and the particles must be ensured to be independently stored and not mutually contacted and influenced. When the fire extinguishing agent works, the superfine dry powder particles are released to a fire scene through high-pressure airflow. The fine particles can bypass the obstacles, diffuse in the fire scene and keep for a long time, thereby achieving the aim of quickly and continuously extinguishing fire. Two challenges currently faced by cold aerosol fire extinguishing agents are: firstly, fire extinguishing particles need to be further refined, and the spatial dispersion degree is improved; secondly, the ultrafine dry powder is prevented from caking in the storage process. The development of cold aerosol fire extinguishing systems is always troubled by the above two technical bottlenecks. The cold aerosol fire extinguishing agent system also comprises a superfine water mist fire extinguishing agent, wherein the superfine water mist generally refers to small water drops with the particle size of 20-120um, and the small water drops have large surface area and can be quickly vaporized after contacting with flame to absorb heat, so that the fire extinguishing effect is achieved. However, the equipment system is huge, pipelines need to be erected, the daily maintenance cost is expensive, micron-sized water mist is very easy to condense in the releasing process, the particle size is too large, and the fire extinguishing effect is influenced. The water stain formed can also cause short circuits to the circuit instruments and equipment.
The hot aerosol fire extinguishing agent (generating agent) is solid pyrotechnic composition prepared by mixing oxidant, combustible agent, adhesive, modifier, etc. Through the action of current or heat, the medicament is subjected to oxidation-reduction reaction, and the product after combustion is solid small particles which are released to a fire scene through cooling treatment, so that fire extinguishing aerosol is formed. The hot aerosol fire extinguishing agent can not directly extinguish a fire, only after a fire disaster happens, the system is triggered to work, the hot aerosol fire extinguishing agent is ignited, the quick combustion is carried out, and the generated inert gas and solid small particles are sprayed out of the fire extinguishing device, so that the fire extinguishing effect is achieved. The diameter of fine particles generated after the combustion of the hot aerosol medicament is mainly about 1um, the surface area of the fine particles is very large, the whole space can be rapidly diffused through irregular Brownian motion, and the fire is extinguished in a full-coverage mode, so that the fire extinguishing efficiency is very high.
The hot aerosol fire extinguishing agent technology is advanced, the use is wide, and the application prospect is huge. The K-type hot aerosol fire extinguishing agent sold in the market at present has the problems that the product has huge corrosivity on electronic metal parts and a nozzle is easy to block, and the application range of the K-type hot aerosol fire extinguishing agent is limited. The commercially available S-type hot aerosol fire extinguishing agent has the problems of low spraying speed, incomplete reaction, low fire extinguishing efficiency, incapability of effectively ensuring the ignition rate after long-term storage of the agent and the like.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems that the product of the existing aerosol fire extinguishing agent has huge corrosivity to electronic metal parts and a nozzle is easy to be blocked, the preparation method of the corrosion-resistant aerosol fire extinguishing agent is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
(1) respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill for ball milling treatment to obtain potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder, respectively drying the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder and sieving the dried potassium nitrate powder, the dried aluminum sulfate powder, the dried sodium bicarbonate powder and the dried charcoal powder to obtain dried potassium nitrate powder, dried aluminum sulfate powder, dried sodium bicarbonate powder and dried charcoal powder;
(2) mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder and dry charcoal powder, stirring to obtain a mixture, and sieving to obtain matrix powder;
(3) mixing glutinous rice flour and deionized water, stirring at constant temperature, and cooling to room temperature to obtain a binder;
(4) uniformly mixing the binder and the matrix powder, granulating to obtain a green body, and drying the green body to obtain precursor particles;
(5) and mixing the precursor particles, stearic acid and acetone, stirring to obtain a mixed material, putting the mixed material into a vacuum drier, taking out the mixed material every 10-12 hours, stirring once, and taking out the mixed material after 40-48 hours to obtain the corrosion-resistant aerosol fire extinguishing agent.
The ball milling treatment step in the step (1) is as follows: respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill, and carrying out ball milling for 10-15 min at the rotating speed of 30-50 r/min.
The drying and screening treatment steps in the step (1) are as follows: respectively placing the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder in an oven at the temperature of 60-70 ℃ for drying for 4-5 h, cooling to room temperature, and respectively sieving with a 100-120-mesh sieve.
The proportions of the dry potassium nitrate powder, the dry aluminum sulfate powder, the dry sodium bicarbonate powder and the dry charcoal powder in the step (2) are respectively as follows: weighing 30-40 parts by weight of dry potassium nitrate powder, 10-20 parts by weight of dry aluminum sulfate powder, 30-40 parts by weight of dry sodium bicarbonate powder and 5-15 parts by weight of dry charcoal powder.
The stirring treatment step in the step (2) is as follows: mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder and dry charcoal powder, and stirring for 10-20 min at a stirring speed of 80-100 r/min.
The sieving treatment step in the step (2) is as follows: and (4) sieving the mixture by a 50-60-mesh sieve, and repeatedly sieving for 3-5 times.
The constant-temperature stirring treatment step in the step (3) is as follows: mixing the glutinous rice flour and the deionized water according to the mass ratio of 1: 3, and stirring at a constant temperature of 90-100 ℃ and a stirring speed of 100-150 r/min for 10-20 min.
The granulating step in the step (4) is as follows: uniformly mixing the binder and the matrix powder according to the mass ratio of 1: 5, and granulating through a 50-60-mesh sieve.
The drying treatment step in the step (4) is as follows: and (3) drying the blank in an oven at the temperature of 20-25 ℃ for 30-40 min.
The stirring treatment step in the step (5) is as follows: mixing the precursor particles, stearic acid and acetone according to the mass ratio of 10: 0.04: 2, and stirring for 3-5 min at the stirring speed of 50-80 r/min.
Compared with other methods, the method has the beneficial technical effects that:
(1) the invention takes potassium nitrate as a main oxidant, aluminum sulfate and sodium bicarbonate as auxiliary oxidants, charcoal as a reducing agent, licorice powder as a foaming agent and glutinous rice powder as a binder to prepare a fire extinguishing agent matrix, and stearic acid is adopted to coat the fire extinguishing agent matrix to prepare the corrosion-resistant aerosol fire extinguishing agent; the aluminum sulfate and the sodium bicarbonate generate a large amount of carbon dioxide gas after combustion, the carbon dioxide gas and the foaming agent licorice powder generate a plurality of bubbles, the foam has small density and viscosity, can cover the surface of an inflamer to isolate air, meanwhile, the carbon dioxide is inert gas and does not support combustion, after the aerosol generating agent is sprayed, products mainly comprise potassium oxide, carbonate and bicarbonate, the potassium oxide, the carbonate and the bicarbonate are easy to absorb moisture, the potassium oxide, the carbonate and the bicarbonate can react with water to generate strong alkaline solution, and the foam covers the electronic metal part to play a role in isolation, so that the products are prevented from corroding the protected electronic metal part;
(2) the fire extinguishing agent matrix is coated with stearic acid, so that the moisture absorption of the fire extinguishing agent matrix can be improved, and the nozzle is not easy to block; stearic acid can absorb moisture, so that the fire extinguishing agent has good moisture absorption resistance and can burn better, and the aerosol fire extinguishing agent coated by stearic acid has good dispersibility, small caking and easy storage;
(3) the main products generated after the combustion of the aluminum sulfate and the sodium bicarbonate are aluminum hydroxide, the aluminum hydroxide can decompose chemically combined water at high temperature, and the decomposition reaction is an endothermic reaction, so that the thermal degradation speed of the high polymer can be delayed, the combustion of the high polymer is slowed or inhibited, the temperature rise of the high polymer is inhibited, and carbonization and smoke inhibition are promoted; in addition, the released water vapor can dilute the concentration of combustible materials and reduce the contribution of combustible gas to combustion, so that the heat release amount and smoke generation amount of the system are reduced, and the combustion is also stopped; the aluminum hydroxide can generate an aluminum oxide protective film on the surface of the protected electronic metal part, isolate oxygen, prevent continuous combustion and prevent the electronic metal part from being corroded by the aqueous solution of potassium oxide, carbonate and bicarbonate; aluminum hydroxide produces strongly dehydrating substances under combustion conditions and hardly produces flammable volatiles, thereby preventing flame spread.
Detailed Description
Respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill, ball-milling for 10-15 min at the rotating speed of 30-50 r/min to obtain potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder, respectively placing the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder in an oven at the temperature of 60-70 ℃, drying for 4-5 h, cooling to room temperature, and respectively sieving by a sieve of 100-120 meshes to obtain dried potassium nitrate powder, dried aluminum sulfate powder, dried sodium bicarbonate powder and dried charcoal powder; weighing 30-40 parts by weight of dry potassium nitrate powder, 10-20 parts by weight of dry aluminum sulfate powder, 30-40 parts by weight of dry sodium bicarbonate powder and 5-15 parts by weight of dry charcoal powder respectively, mixing the dry potassium nitrate powder, the dry aluminum sulfate powder, the dry sodium bicarbonate powder and the dry charcoal powder, stirring for 10-20 min at a stirring speed of 80-100 r/min to obtain a mixture, sieving the mixture through a 50-60-mesh sieve, and repeatedly sieving for 3-5 times to obtain matrix powder; mixing glutinous rice flour and deionized water according to the mass ratio of 1: 3, stirring at a constant temperature of 90-100 ℃ and a stirring speed of 100-150 r/min for 10-20 min, and cooling to room temperature to obtain the binder; uniformly mixing the binder and the matrix powder according to the mass ratio of 1: 5, granulating through a 50-60-mesh sieve to obtain a blank body, and drying the blank body in an oven at the temperature of 20-25 ℃ for 30-40 min to obtain precursor particles; mixing the precursor particles, stearic acid and acetone according to the mass ratio of 10: 0.04: 2, stirring for 3-5 min at the stirring speed of 50-80 r/min to obtain a mixed material, placing the mixed material in a vacuum drier, taking out the mixed material every 10-12 h, stirring once, and taking out the mixed material after 40-48 h to obtain the corrosion-resistant aerosol fire extinguishing agent.
Example 1
Respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill for ball milling treatment to obtain potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder, respectively drying the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder and sieving the dried potassium nitrate powder, the dried aluminum sulfate powder, the dried sodium bicarbonate powder and the dried charcoal powder to obtain dried potassium nitrate powder, dried aluminum sulfate powder, dried sodium bicarbonate powder and dried charcoal powder; mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder and dry charcoal powder, stirring to obtain a mixture, and sieving to obtain matrix powder; mixing glutinous rice flour and deionized water, stirring at constant temperature, and cooling to room temperature to obtain a binder; uniformly mixing the binder and the matrix powder, granulating to obtain a green body, and drying the green body to obtain precursor particles; and mixing the precursor particles, stearic acid and acetone, stirring to obtain a mixed material, putting the mixed material into a vacuum drier, taking out the mixed material every 10 hours, stirring once, and taking out the mixed material after 40 hours to obtain the corrosion-resistant aerosol fire extinguishing agent. The ball milling treatment steps are as follows: respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill, and ball-milling at the rotation speed of 30r/min for 10 min. The drying and sieving treatment steps are as follows: respectively placing potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder in an oven at 60 deg.C, drying for 4 hr, cooling to room temperature, and respectively sieving with 100 mesh sieve. The proportions of the dry potassium nitrate powder, the dry aluminum sulfate powder, the dry sodium bicarbonate powder and the dry charcoal powder are respectively as follows: respectively weighing 30 parts of dry potassium nitrate powder, 10 parts of dry aluminum sulfate powder, 30 parts of dry sodium bicarbonate powder and 5 parts of dry charcoal powder according to parts by weight. The stirring treatment steps are as follows: mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder, and dry charcoal powder, and stirring at 80r/min for 10 min. The sieving treatment steps are as follows: the mixture was sieved through a 50 mesh sieve and sieved repeatedly 3 times. The constant-temperature stirring treatment steps are as follows: mixing glutinous rice flour and deionized water according to the mass ratio of 1: 3, and stirring at a constant temperature of 90 ℃ and a stirring speed of 100r/min for 10 min. The granulation step is as follows: uniformly mixing the binder and the matrix powder according to the mass ratio of 1: 5, and granulating through a 50-mesh sieve. The drying treatment steps are as follows: and drying the blank in an oven at the temperature of 20 ℃ for 30 min. The stirring treatment steps are as follows: mixing the precursor particles, stearic acid and acetone according to the mass ratio of 10: 0.04: 2, and stirring for 3min at the stirring speed of 50 r/min.
Example 2
Respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill for ball milling treatment to obtain potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder, respectively drying the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder and sieving the dried potassium nitrate powder, the dried aluminum sulfate powder, the dried sodium bicarbonate powder and the dried charcoal powder to obtain dried potassium nitrate powder, dried aluminum sulfate powder, dried sodium bicarbonate powder and dried charcoal powder; mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder and dry charcoal powder, stirring to obtain a mixture, and sieving to obtain matrix powder; mixing glutinous rice flour and deionized water, stirring at constant temperature, and cooling to room temperature to obtain a binder; uniformly mixing the binder and the matrix powder, granulating to obtain a green body, and drying the green body to obtain precursor particles; and mixing the precursor particles, stearic acid and acetone, stirring to obtain a mixed material, putting the mixed material into a vacuum drier, taking out and stirring once every 11 hours, and taking out after 44 hours to obtain the corrosion-resistant aerosol fire extinguishing agent. The ball milling treatment steps are as follows: respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill, and ball-milling at a rotation speed of 40r/min for 12 min. The drying and sieving treatment steps are as follows: respectively placing potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder in an oven at 65 deg.C, drying for 4 hr, cooling to room temperature, and respectively sieving with 110 mesh sieve. The proportions of the dry potassium nitrate powder, the dry aluminum sulfate powder, the dry sodium bicarbonate powder and the dry charcoal powder are respectively as follows: weighing 35 parts of dry potassium nitrate powder, 15 parts of dry aluminum sulfate powder, 35 parts of dry sodium bicarbonate powder and 10 parts of dry charcoal powder respectively according to parts by weight. The stirring treatment steps are as follows: mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder, and dry charcoal powder, and stirring at 90r/min for 15 min. The sieving treatment steps are as follows: the mixture was sieved through a 55 mesh sieve and sieved repeatedly 4 times. The constant-temperature stirring treatment steps are as follows: mixing glutinous rice flour and deionized water according to the mass ratio of 1: 3, and stirring at the constant temperature of 95 ℃ and the stirring speed of 125r/min for 15 min. The granulation step is as follows: uniformly mixing the binder and the matrix powder according to the mass ratio of 1: 5, and granulating through a 55-mesh sieve. The drying treatment steps are as follows: and drying the blank in an oven at the temperature of 22 ℃ for 35 min. The stirring treatment steps are as follows: mixing the precursor particles, stearic acid and acetone according to the mass ratio of 10: 0.04: 2, and stirring for 4min at the stirring speed of 65 r/min.
Example 3
Respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill for ball milling treatment to obtain potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder, respectively drying the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder and sieving the dried potassium nitrate powder, the dried aluminum sulfate powder, the dried sodium bicarbonate powder and the dried charcoal powder to obtain dried potassium nitrate powder, dried aluminum sulfate powder, dried sodium bicarbonate powder and dried charcoal powder; mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder and dry charcoal powder, stirring to obtain a mixture, and sieving to obtain matrix powder; mixing glutinous rice flour and deionized water, stirring at constant temperature, and cooling to room temperature to obtain a binder; uniformly mixing the binder and the matrix powder, granulating to obtain a green body, and drying the green body to obtain precursor particles; and mixing the precursor particles, stearic acid and acetone, stirring to obtain a mixed material, putting the mixed material into a vacuum drier, taking out the mixed material every 12 hours, stirring once, and taking out the mixed material after 48 hours to obtain the corrosion-resistant aerosol fire extinguishing agent. The ball milling treatment steps are as follows: respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill, and ball-milling at a rotation speed of 50r/min for 15 min. The drying and sieving treatment steps are as follows: respectively placing potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder in an oven at 70 deg.C, drying for 5 hr, cooling to room temperature, and respectively sieving with 120 mesh sieve. The proportions of the dry potassium nitrate powder, the dry aluminum sulfate powder, the dry sodium bicarbonate powder and the dry charcoal powder are respectively as follows: weighing 40 parts of dry potassium nitrate powder, 20 parts of dry aluminum sulfate powder, 40 parts of dry sodium bicarbonate powder and 15 parts of dry charcoal powder respectively according to parts by weight. The stirring treatment steps are as follows: mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder, and dry charcoal powder, and stirring at 100r/min for 20 min. The sieving treatment steps are as follows: the mixture was sieved through a 60 mesh sieve and sieved repeatedly 5 times. The constant-temperature stirring treatment steps are as follows: mixing glutinous rice flour and deionized water according to the mass ratio of 1: 3, and stirring at constant temperature of 100 ℃ and the stirring speed of 150r/min for 20 min. The granulation step is as follows: uniformly mixing the binder and the matrix powder according to the mass ratio of 1: 5, and granulating through a 60-mesh sieve. The drying treatment steps are as follows: and (5) drying the blank in an oven at the temperature of 25 ℃ for 40 min. The stirring treatment steps are as follows: mixing the precursor particles, stearic acid and acetone according to the mass ratio of 10: 0.04: 2, and stirring for 5min at the stirring speed of 80 r/min.
Comparative example: an aerosol fire extinguishing agent produced by Dongguan company.
The aerosol fire extinguishing agent prepared in the embodiment and the comparative example is detected as follows:
corrosion property: and respectively putting the copper sheet bearing the aerosol particles in a closed environment with relative humidity of 90% and 70% for 24 hours, observing the corrosion condition of aerosol sediments on the surface of the copper sheet, finally removing rusty matters on the surface, and calculating the corrosion weight loss of the copper sheet.
Fire extinguishing performance: respectively placing fire extinguishing agent with different formulas at a certain mass in a distance of 1m3The center of the experimental box iron stand is provided. Three fire sources are arranged in the experiment box, wherein the vertical height of two low-position fire sources from the bottom plate is 225mm, the two low-position fire sources are respectively positioned at two pairs of corner positions of the bottom plate, the vertical height of the high-position fire source from the bottom plate is 440mm, and the horizontal distance between the three fire sources and two adjacent vertical box walls is 150 mm. The fire source fuel adopts 90# motor gasoline, water with the depth of 140mm is firstly added into the iron sheet cylinder, and then 30mm gasoline is added, so that the glaze surface is about 10mm away from the edge of the upper opening of the iron sheet cylinder. After the box door is closed, the fire extinguishing powder column is ignited, and the combustion time of the powder column and the fire extinguishing time of the three fire sources are recorded by a stopwatch.
The specific test results are shown in table 1.
Table 1 comparative table of property characterization
| Detecting items | Example 1 | Example 2 | Example 3 | Comparative example |
| Weight loss/g of copper sheet | 0.01 | 0.02 | 0.01 | 0.06 |
| Time of fire extinguishing/s | 14 | 15 | 13 | 63 |
As can be seen from Table 1, the aerosol fire extinguishing agent prepared by the invention has good corrosion resistance and fire extinguishing performance.
Claims (10)
1. A preparation method of a corrosion-resistant aerosol fire extinguishing agent is characterized by comprising the following specific preparation steps:
(1) respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill for ball milling treatment to obtain potassium nitrate powder, aluminum sulfate powder, sodium bicarbonate powder and charcoal powder, respectively drying the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder and sieving the dried potassium nitrate powder, the dried aluminum sulfate powder, the dried sodium bicarbonate powder and the dried charcoal powder to obtain dried potassium nitrate powder, dried aluminum sulfate powder, dried sodium bicarbonate powder and dried charcoal powder;
(2) mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder and dry charcoal powder, stirring to obtain a mixture, and sieving to obtain matrix powder;
(3) mixing glutinous rice flour and deionized water, stirring at constant temperature, and cooling to room temperature to obtain a binder;
(4) uniformly mixing the binder and the matrix powder, granulating to obtain a green body, and drying the green body to obtain precursor particles;
(5) and mixing the precursor particles, stearic acid and acetone, stirring to obtain a mixed material, putting the mixed material into a vacuum drier, taking out the mixed material every 10-12 hours, stirring once, and taking out the mixed material after 40-48 hours to obtain the corrosion-resistant aerosol fire extinguishing agent.
2. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the ball milling treatment step in the step (1) is as follows: respectively placing potassium nitrate, aluminum sulfate, sodium bicarbonate and charcoal in a ball mill, and carrying out ball milling for 10-15 min at the rotating speed of 30-50 r/min.
3. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the drying and screening treatment steps in the step (1) are as follows: respectively placing the potassium nitrate powder, the aluminum sulfate powder, the sodium bicarbonate powder and the charcoal powder in an oven at the temperature of 60-70 ℃ for drying for 4-5 h, cooling to room temperature, and respectively sieving with a 100-120-mesh sieve.
4. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the proportions of the dry potassium nitrate powder, the dry aluminum sulfate powder, the dry sodium bicarbonate powder and the dry charcoal powder in the step (2) are respectively as follows: weighing 30-40 parts by weight of dry potassium nitrate powder, 10-20 parts by weight of dry aluminum sulfate powder, 30-40 parts by weight of dry sodium bicarbonate powder and 5-15 parts by weight of dry charcoal powder.
5. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the stirring treatment step in the step (2) is as follows: mixing dry potassium nitrate powder, dry aluminum sulfate powder, dry sodium bicarbonate powder and dry charcoal powder, and stirring for 10-20 min at a stirring speed of 80-100 r/min.
6. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the sieving treatment step in the step (2) is as follows: and (4) sieving the mixture by a 50-60-mesh sieve, and repeatedly sieving for 3-5 times.
7. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the constant-temperature stirring treatment step in the step (3) is as follows: mixing the glutinous rice flour and the deionized water according to the mass ratio of 1: 3, and stirring at a constant temperature of 90-100 ℃ and a stirring speed of 100-150 r/min for 10-20 min.
8. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the granulating step in the step (4) is as follows: uniformly mixing the binder and the matrix powder according to the mass ratio of 1: 5, and granulating through a 50-60-mesh sieve.
9. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the drying treatment step in the step (4) is as follows: and (3) drying the blank in an oven at the temperature of 20-25 ℃ for 30-40 min.
10. The method for preparing a corrosion-resistant aerosol fire extinguishing agent according to claim 1, wherein: the stirring treatment step in the step (5) is as follows: mixing the precursor particles, stearic acid and acetone according to the mass ratio of 10: 0.04: 2, and stirring for 3-5 min at the stirring speed of 50-80 r/min.
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| CN202010347069.7A CN111530012A (en) | 2020-04-28 | 2020-04-28 | Preparation method of corrosion-resistant aerosol fire extinguishing agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113384845A (en) * | 2021-05-18 | 2021-09-14 | 重庆安全技术职业学院 | Aerosol fire extinguishing agent and preparation method thereof |
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| KR100563741B1 (en) * | 2004-07-14 | 2006-04-04 | 김진호 | Composition of reinforced liquid extinguishing agent |
| CN107261379A (en) * | 2017-07-15 | 2017-10-20 | 合肥皖水信息科技有限公司 | A kind of hot-gas sol fire extinguishing agent of low-corrosiveness |
| CN110339504A (en) * | 2019-06-19 | 2019-10-18 | 郭文俊 | A kind of fire extinguisher bomb and its extinguishing method and the application in the fire extinguishing of forest zone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5027399A (en) * | 1973-07-13 | 1975-03-20 | ||
| CN1060789A (en) * | 1990-10-20 | 1992-05-06 | 公安部上海消防科学研究所 | Do the mixed foam fire-extinguishing agent of additive preparation with natural polymeric surface active agent |
| KR100563741B1 (en) * | 2004-07-14 | 2006-04-04 | 김진호 | Composition of reinforced liquid extinguishing agent |
| CN107261379A (en) * | 2017-07-15 | 2017-10-20 | 合肥皖水信息科技有限公司 | A kind of hot-gas sol fire extinguishing agent of low-corrosiveness |
| CN110339504A (en) * | 2019-06-19 | 2019-10-18 | 郭文俊 | A kind of fire extinguisher bomb and its extinguishing method and the application in the fire extinguishing of forest zone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113384845A (en) * | 2021-05-18 | 2021-09-14 | 重庆安全技术职业学院 | Aerosol fire extinguishing agent and preparation method thereof |
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