CN1038309C - Potassium chloride fire-extinguishing agent and its production method - Google Patents
Potassium chloride fire-extinguishing agent and its production method Download PDFInfo
- Publication number
- CN1038309C CN1038309C CN 92103674 CN92103674A CN1038309C CN 1038309 C CN1038309 C CN 1038309C CN 92103674 CN92103674 CN 92103674 CN 92103674 A CN92103674 A CN 92103674A CN 1038309 C CN1038309 C CN 1038309C
- Authority
- CN
- China
- Prior art keywords
- extinguishing agent
- fire
- potassium chloride
- dry powder
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 title claims abstract description 114
- 239000001103 potassium chloride Substances 0.000 title claims abstract description 57
- 235000011164 potassium chloride Nutrition 0.000 title claims abstract description 57
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 70
- 230000001681 protective effect Effects 0.000 claims abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 21
- 239000003960 organic solvent Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000006229 carbon black Substances 0.000 claims description 9
- 239000004927 clay Substances 0.000 claims description 9
- 239000010445 mica Substances 0.000 claims description 9
- 229910052618 mica group Inorganic materials 0.000 claims description 9
- 229920002545 silicone oil Polymers 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000002209 hydrophobic effect Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 10
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 abstract description 3
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 239000003995 emulsifying agent Substances 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Fire-Extinguishing Compositions (AREA)
Abstract
The present invention relates to a potassium chloride dry-powder fire-extinguishing agent and a production method. The granularity of the dry-powder fire-extinguishing agent is 60 meshes, the granule surface of the dry-powder fire-extinguishing agent has two layers of silicified protective films, and silicon powder is filled between the two layers of silicified protective films. A principal raw material of the dry-powder fire-extinguishing agent is potassium chloride, and thus, the potassium chloride dry-powder fire-extinguishing agent has the characteristics of wide material sources, low cost, high fire-extinguishing efficiency, wide fire-extinguishing range and moisture absorption and no agglomeration and deterioration after long-term storage. When in use, the present invention can be matched with all fire-extinguishing devices of the existing NaHCO3 dry-powder fire-extinguishing agent, not only can extinguish class B and C fire, but also can extinguish class D fire.
Description
The invention relates to a dry powder extinguishing agent, in particular to a potassium chloride dry powder extinguishing agent and a production method thereof.
For a long time, the dry powder extinguishing agent used in China is NaHCO3Sodium bicarbonate dry powder extinguishing agent, NaHCO, as main raw material3The sodium carbonate is an important industrial raw material in China, and is in a tight supply and high in price in the current market of China, so that the production of the sodium bicarbonate dry powder extinguishing agent is in a tight tension and the cost is too high. Meanwhile, the sodium bicarbonate dry powder extinguishing agent has low extinguishing efficiency and narrow extinguishing range, and is difficult to adapt to the requirements of modern fire-fighting work.
Before the invention is put forward, the fire extinguishing capability of KCl has been discovered for a long time, but the KCl cannot be popularized and applied because the KCl is extremely easy to absorb moisture and agglomerate and cannot be stored for a long time. NaHCO due to KCl moisture absorption capacity ratio3More powerful, useProduction of NaHCO3The process of the dry powder extinguishing agent cannot achieve the purpose of preventing KCl from absorbing moisture.
The invention aims to solve the problems in the prior art and provides a potassium chloride dry powder extinguishing agent and a production method thereof so as to solve the problem of NaHCO3Excessive cost of dry extinguishing agent, short supply of raw materials, and NaHCO3The production process of the dry powder extinguishing agent cannot prevent the problem of KCl moisture absorption.
In order to achieve the purpose, the invention provides a potassium chloride dry powder extinguishing agent with a novel structure, the particle size of the dry powder extinguishing agent is 60 meshes, and the potassium chloride dry powder extinguishing agent is characterized in that two layers of protective films subjected to silicification are arranged on the surfaces of potassium chloride particles, activated clay and mica powder are wrapped in a first layer of silicification protective film, hydrophobic silicon powder is filled between a second layer of silicification protective film and the first layer of silicification protective film, and white carbon black is adhered to the outer surface of the second layer of silicification protective film.
The invention also provides a production method of the potassium chloride dry powder extinguishing agent, which comprises the following steps:
KCl drying → KCl crushing- → KCl, active white clay and mica powder mixing- → organic silicon oil and organic solvent are added for the first time- → hydrophobic silicon powder mixing is added → organic silicon oil and organic solvent are added for the second time- → white carbon black mixing is added → drying- → screening
a. The KCl drying process is to reduce the water content of the KCl finished product to below 0.5 percent, and is beneficial to the next crushing process.
b. The KCl crushing procedure is to make the particle size of KCl reach 300 meshes.
c. The KCl, the activated clay and the mica powder are fully mixed and stirred uniformly, so that the KCl is fully mixed with the mica powder under the catalytic action of the activated clay, the KCl is dispersed, the material temperature is increased, and the purpose of organic silicon treatment is facilitated.
d. The first addition of organic silicone oil and organic solvent is to mix 40-50% of organic silicone oil, organic solvent and water in the raw material formula into the above-mentioned KCl mixed powder material, and fully stir them to make its temperature naturally rise to 70 deg.C. The function of the procedure is to form a layer of protective film on the surface of the KCl dry powder particles, the protective film can discharge the moisture in the dry powder particles, and the external moisture cannot permeate.
e. The procedure of adding hydrophobic silicon powder is to add silicon powder into the dry powder and stir the mixture fully and evenly to attach a layer of silicon powder on the surface of the dry powder particles.
f. The second addition of the organic silicone oil and the organic solvent is to add the residual organic silicone oil, the organic solvent and the water after the first addition into the dry powder, and fully stir the mixture to ensure that the temperature of the mixture naturally rises to 80 ℃. The process has the effect that a second protective film is formed on the surface of the KCl particle, and the first protective film and the second protective film are supported by silicon powder, so that the two protective films are firmly attached to the surface layer of the dry powder particle and are sleeved on the surface of the dry powder like two spherical rings. The two layers of protective films have good air permeability, moisture in the dry powder particles can be discharged through the protective films, and external moisture can not enter the dry powder particles through the protective films, so that the moisture resistance of the dry powder is improved, and the flowability, the moisture absorption and the caking resistance are enhanced.
g. The procedure of adding the white carbon black is to add the white carbon black into the dry powder and fully and uniformly stir the mixture. As KCl particles are crushed and have some changes in shape, irregular-shaped particles are generated, and gaps among the particles are uneven in size and are mostly H2O, thereby greatly influencing the technical performance of the dry powder extinguishing agent. The purpose of this step is to combine the silica with water around the surface protective film of the dry fine particles and discharge H between the particles2And O molecules are uniformly suspended around the particles through the next drying procedure, so that a water repellent three-dimensional network is formed around the dry powder particles, the immersion of water molecules is effectively resisted, the moisture-proof and anti-caking capacity of the dry powder is further improved, the specific surface area is increased, and the penetration degree is improved.
h. The drying procedure is to dry the prepared dry powder to make the water content lower than 0.2%.
i. The screening step is to filter the dry powder to pass through 60 meshes so that the particle size of the dry powder reaches 60 meshes.
The potassium chloride dry powder extinguishing agent produced by the method has the granularity of 60 meshes, the surface of the particle of the potassium chloride dry powder extinguishing agent is provided with two protective films which are subjected to silicification treatment, silicon powder is filled between the two protective films, and the dry powder extinguishing agent comprises the following raw materials in parts by weight:
potassium chloride technical grade 80-92%
Activated clay 3-6% of industrial grade
1.5 to 3 percent of mica powder industrial grade
1.2 to 3 percent of white carbon black industrial grade
Silicon powder industrial grade 1.5-3%
0.12 to 0.5 percent of organic silicone oil industrial grade
0.2 to 0.6 percent of organic solvent industrial grade
The total amount of all the components is 100 percent
The extinguishing principle of the potassium chloride powder extinguishing agent is basically the same as that of other powder extinguishing agents, mainly chemical extinguishing and physical extinguishing.
It is known that the process of combustion of a substance is a severe oxidation process, and free radicals are developed to sustain the severe oxidation process, so the severe oxidation reaction is also called a free radical chain reaction. While the extinguishing process is a process of cutting off the chain to stop the reaction, it is generally considered that the free radical for maintaining the chain reaction is H※And OH※. The extinguishing process of KCl is as follows:
through the reaction, the free radicals in the combustion reaction are continuously captured by KCl, so that the chain lock is loosened to be thoroughly broken, and the aim of extinguishing fire is fulfilled. Meanwhile, some decomposition reactions exist in the combustion system, and the reactions absorb heat in the system, generate inert gas to dilute the concentration of oxygen in the system and also have a relieving effect on the combustion reaction. The principle of extinguishing metal fire with potassium chloride powder extinguishing agent is that it can be fixed on the vertical surface of hot metal, and can form a soft and thick covering layer on the surface of metal on fire. This coating can insulate the metal from air, choking the metal fire.
The KCl dry powder extinguishing agent is prepared by the production method of the invention through moisture-proof anti-caking treatment, the moisture absorption rate is about 3.0%, the penetration degree is about 30mm, the KCl dry powder extinguishing agent is higher than that specified by more advanced foreign standards of Canada ULC-L514-1678, the moisture absorption rate is less than or equal to 5.0%, the penetration degree is more than 15mm and is nearly doubled, and the surface is loose and has no caking phenomenon after moisture absorption, thereby ensuring that the KCl dry powder is extinguishedThe application performance of the fire agent. A3 kg KCl dry powder fire extinguisher spray with capability of extinguishing B, C-class fire 12B or 2.4m2NaHCO, more widely used than today37B (1.4 m) of dry powder extinguishing agent2) The height is approximately 80 percent. The fire extinguishing capability of the ammonium phosphate dry powder fire extinguishing agent is 1.73m compared with the currently generally accepted high fire extinguishing efficiency2Increase by nearly 0.7m2The extinguishing efficacy of B, C-class fire is high in leaders of all domestic dry powder extinguishing agents. A4 kg dry powder fire extinguisher filled with KCl dry powder fire extinguishing agent can extinguish the fire extinguishing area of 8kg dry powder fire extinguisher specified by the current national standard, has high fire extinguishing speed and can quickly control the fire behavior in a moment. Meanwhile, the KCl dry powder extinguishing agent can also extinguish class D light metal fire, and fills the blank that no class D fire extinguishing agent is available in China.
In conclusion, the KCl dry powder extinguishing agent has the characteristics of wide raw material source, low cost, high extinguishing efficiency, high extinguishing speed, wide extinguishing range, no agglomeration after long-term storage and no deterioration after moisture absorption. Can be used together with existing NaHCO3All the fire extinguishing devices of the dry powder extinguishing agent are matched, so that the dry powder extinguishing agent is easy to popularize.
The following is an example of the production of 100kg of the potassium chloride dry powder fireextinguishing agent.
Raw material formula
Industrial grade 90kg of potassium chloride
Activated Clay technical grade 3kg
Mica powder 2kg of industrial grade
White carbon black industrial grade 2kg
Hydrophobic silicon powder industrial grade 2kg
0.4kg of silicone oil technical grade
Organic solvent
MS-1 emulsifier
Or emulsifier EL technical grade 0.6kg
Or emulsifiers OP
According to the formula, the following preparation process is adopted for production.
1. KCl is dried for 30min at the temperature of 90 ℃,
2. crushing KCl, sieving through 300 meshes,
3. mixing mica powder and activated clay into pulverized KCl, stirring in a stirrer for 3-8min,
4. adding 50 wt% of organic silicone oil and organic solvent in the raw material formula for the first time, stirring in a stirrer for 5-10min until the temperature reaches 70 ℃,
5. adding hydrophobic silicon powder, fully and uniformly stirring,
6. adding the rest 50 wt% of organic silicone oil and organic solvent in the raw material formula for the second time, stirring for 5-10min until the temperature reaches 80 deg.C,
7. adding white carbon black, stirring for 3-5min,
8. drying the prepared dry powder at the temperature of 70-90 ℃ for 40min,
9. the mixture is sieved by a sieve of 60 meshes,
10. and (6) packaging, inspecting and warehousing.
In the above process, the rotation speed of the stirrer is 500 rpm.
Claims (2)
1. A potassium chloride dry powder extinguishing agent has a particle size of 60 meshes, and is characterized in that two layers of protective films subjected to silicification are arranged on the surfaces of potassium chloride particles, a first layer of silicification protective film is internally coated with potassium chloride particles, activated clay and mica powder, hydrophobic silicon powder is filled between a second layer of silicification protective film and the first layer of silicification protective film, and white carbon black is adhered to the outer surface of the second layer of silicification protective film.
2. A method for producing a potassium chloride dry powder extinguishing agent according to claim 1, which comprises the following steps:
a. KCl is dried to reduce the water content to below 0.5 percent,
b. KCl is crushed to make the granularity reach 300 meshes,
c. KCl, activated clay and mica powder are mixed uniformly,
d. adding 40-50% of organic silicone oil and organic solvent for the first time, stirring fully to naturally reach 70 ℃,
e. adding hydrophobic silicon powder and mixing evenly,
f. adding the rest organic silicon oil and organic solvent for the second time, fully stirring to ensure that the temperature naturally reaches 80 ℃,
g. adding the white carbon black and mixing the mixture evenly,
h. drying the prepared dry powder to make the water content lowerthan 0.2%,
i. sieving through 60 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103674 CN1038309C (en) | 1992-05-11 | 1992-05-11 | Potassium chloride fire-extinguishing agent and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103674 CN1038309C (en) | 1992-05-11 | 1992-05-11 | Potassium chloride fire-extinguishing agent and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1067592A CN1067592A (en) | 1993-01-06 |
| CN1038309C true CN1038309C (en) | 1998-05-13 |
Family
ID=4940369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92103674 Expired - Fee Related CN1038309C (en) | 1992-05-11 | 1992-05-11 | Potassium chloride fire-extinguishing agent and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038309C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101455886B (en) * | 2007-12-10 | 2011-09-28 | 鸿富锦精密工业（深圳）有限公司 | Dry powder extinguishing agent manufacture method |
| CN104645541B (en) * | 2015-02-11 | 2018-09-25 | 宁波能林消防器材有限公司 | A kind of ABC powder extinguishing agent |
-
1992
- 1992-05-11 CN CN 92103674 patent/CN1038309C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1067592A (en) | 1993-01-06 |
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