CN116966469A - Flow-enhanced high-efficiency superfine dry powder extinguishing agent and preparation method thereof - Google Patents
Flow-enhanced high-efficiency superfine dry powder extinguishing agent and preparation method thereof Download PDFInfo
- Publication number
- CN116966469A CN116966469A CN202310954005.7A CN202310954005A CN116966469A CN 116966469 A CN116966469 A CN 116966469A CN 202310954005 A CN202310954005 A CN 202310954005A CN 116966469 A CN116966469 A CN 116966469A
- Authority
- CN
- China
- Prior art keywords
- dry powder
- extinguishing agent
- fluidity
- parts
- powder extinguishing
- 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.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 86
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000006229 carbon black Substances 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 claims abstract description 22
- 230000000996 additive effect Effects 0.000 claims abstract description 21
- 239000000440 bentonite Substances 0.000 claims abstract description 21
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 21
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003607 modifier Substances 0.000 claims abstract description 20
- 239000007791 liquid phase Substances 0.000 claims abstract description 19
- 239000010451 perlite Substances 0.000 claims abstract description 17
- 235000019362 perlite Nutrition 0.000 claims abstract description 17
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims abstract description 7
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical compound [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000001737 promoting effect Effects 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 29
- 238000005507 spraying Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 239000011812 mixed powder Substances 0.000 claims description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 229920002545 silicone oil Polymers 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 abstract description 4
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 7
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 235000019837 monoammonium phosphate Nutrition 0.000 description 7
- 238000000227 grinding Methods 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000006012 monoammonium phosphate Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000051 modifying effect Effects 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- GSTANBWEAXRNHP-UHFFFAOYSA-N azanium;hydrogen carbonate;sodium Chemical compound [NH4+].[Na].OC([O-])=O GSTANBWEAXRNHP-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000010902 jet-milling Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing Compositions (AREA)
Abstract
The invention provides a flow-enhanced high-efficiency superfine dry powder extinguishing agent, which comprises the following components in parts by weight: base material: 90-93 parts of nano hydrophobic white carbon black: 6-8 parts of fluidity-promoting additive: 0.25 to 0.5 part of liquid phase modifier: 0.25 to 1.5 portions; the base material comprises ammonium phosphate salt and/or bicarbonate; the fluidity promoting additive comprises perlite and/or bentonite. The invention can further improve the fluidity of the superfine dry powder extinguishing agent by adding a trace amount of perlite and/or bentonite into the high-content base material, the fluidity-enhanced high-efficiency superfine dry powder extinguishing agent has the effective extinguishing component accounting for 90% or more, the Carr fluidity index is more than 60, the strong fluidity and the high-efficiency extinguishing capability are provided, and the invention is more suitable for filling superfine dry powder extinguishing equipment. The invention also provides a preparation method of the flow-enhanced high-efficiency superfine dry powder extinguishing agent.
Description
Technical Field
The invention belongs to the technical field of fire-fighting products, and particularly relates to a flow-enhanced high-efficiency superfine dry powder extinguishing agent and a preparation method thereof.
Background
The superfine dry powder extinguishing agent is a novel extinguishing material and has become one of the hot research directions in the field of extinguishment.
The superfine dry powder extinguishing agent has a plurality of advantages, and most remarkable of the superfine dry powder extinguishing agent has high-efficiency extinguishing effect. The fire-extinguishing agent has small particle size and large specific surface area, and can adsorb oxygen on the surface of a fire source more quickly, so that the effect of quickly extinguishing fire is achieved. In addition, the temperature of the surface of the combustion object can be rapidly reduced, and the expansion of fire is prevented; the fire extinguishing agent is nontoxic, noncorrosive and nonconductive, can be widely applied to the extinguishing of various fire accidents, and can avoid damage to human bodies and objects; easy transportation, easy storage and low cost.
However, flowability problem has been one of the difficulties in the design of ultrafine dry powder extinguishing agents. Ultrafine dry powder extinguishing agents are now used as fillers for filling a wide variety of extinguishing equipment. If the fluidity of the superfine dry powder extinguishing agent is poor, the defects of high residual powder rate of the superfine dry powder extinguishing agent, low kinetic energy of the sprayed superfine dry powder extinguishing agent and the like in the spraying process are caused, and the extinguishing efficiency of the superfine dry powder extinguishing agent is reduced.
Some researchers have also conducted research on this problem.
Chinese patent publication No. CN 106807026A discloses a method for improving fluidity of ultra-fine dry powder extinguishing agent, comprising: according to the weight fraction, the superfine dry powder is 100 parts and the hydrophobic nano silicon dioxide is 3-5 parts; layering ultrafine dry powder and hydrophobic nano silicon dioxide into a barrel type high-speed mixer; mixing at a low speed; mixing at a high speed; and (5) low-speed processing. However, hydrophobic nanosilica alone does not address the moisture resistance of ultrafine dry powders.
The Chinese patent publication No. CN 108159623A discloses a high-fluidity ABC superfine dry powder extinguishing agent which comprises the following raw materials in parts by weight: 120-160 parts of industrial grade polyphosphoric acid, 10-20 parts of activated clay compound, 20-30 parts of fire extinguishing filler, 2-5 parts of calcium stearate, 4-8 parts of silicone oil and 8-16 parts of methylene dichloride. The fire extinguishing agent has the defect that the content of the effective components for extinguishing the fire is low, and the addition of a large amount of additives can reduce the fire extinguishing effect of the superfine dry powder fire extinguishing agent.
Disclosure of Invention
The invention aims to provide a flow-enhanced high-efficiency superfine dry powder extinguishing agent and a preparation method thereof.
The invention provides a flow-enhanced high-efficiency superfine dry powder extinguishing agent, which comprises the following components in parts by weight:
base material: 90-93 parts of nano hydrophobic white carbon black: 6-8 parts of fluidity-promoting additive: 0.25 to 0.5 part of liquid phase modifier: 0.25 to 1.5 portions;
the base material comprises ammonium phosphate salt and/or bicarbonate; the fluidity promoting additive comprises perlite and/or bentonite.
Preferably, the liquid phase modifier comprises silicone oil and/or a silane coupling agent.
Preferably, the particle size of the fluidity-promoting additive is less than or equal to 200 μm.
The invention provides a preparation method of the flow-enhanced high-efficiency superfine dry powder extinguishing agent, which comprises the following steps:
a) Pulverizing the base material into D 90 Mixing the powder with the fluidity-promoting additive for 1 to 5 minutes to obtain primary mixed powder;
b) Dispersing the liquid phase modifier in a solvent, fully contacting with the primary mixed powder in a spraying mode, and continuously mixing for 3-8 min after the spraying is finished;
c) Adding nano hydrophobic white carbon black, and mixing for 5-15 min;
d) And C) drying the mixed powder obtained in the step C) to obtain the flow enhanced high-efficiency superfine dry powder extinguishing agent.
Preferably, the solvent in the step B) is one or more of ethanol, methanol and acetone.
Preferably, the mass ratio of the liquid phase modifier to the solvent is 1: (50-100).
Preferably, the temperature of the mixing in step A), step B) and step C) is 60 to 80 ℃.
Preferably, the drying temperature in the step D) is 50-90 ℃, and the drying time is 15-30 min.
The invention provides a flow-enhanced high-efficiency superfine dry powder extinguishing agent, which comprises the following components in parts by weight: base material: 90-93 parts of nano hydrophobic white carbon black: 6-8 parts of fluidity-promoting additive: 0.25 to 0.5 part of liquid phase modifier: 0.25 to 1.5 portions; the base material comprises ammonium phosphate salt and/or bicarbonate; the fluidity promoting additive comprises perlite and/or bentonite. The invention can further improve the fluidity of the superfine dry powder extinguishing agent by adding a trace amount of perlite and/or bentonite into the high-content base material, the fluidity-enhanced high-efficiency superfine dry powder extinguishing agent has the effective extinguishing component accounting for 90% or more, the Carr fluidity index is more than 60, the strong fluidity and the high-efficiency extinguishing capability are provided, and the invention is more suitable for filling superfine dry powder extinguishing equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is an SEM image of ultrafine dry powder extinguishing agent particles of example 1 of the invention;
FIG. 2 shows the Carr flowability index of the ultrafine dry powder extinguishing agent of examples 1 and 5 according to the present invention;
FIG. 3 is an SEM image of bentonite used in the examples of the present invention;
FIG. 4 is an SEM image of perlite used in the examples of the invention;
FIG. 5 shows the Carr flowability index of the ultra-fine dry powder extinguishing agents of different bentonite content in example 6 of the present invention;
FIG. 6 shows the Carr flowability index of ultrafine dry powder extinguishing agents of varying perlite content in example 7 of the invention.
Detailed Description
The invention provides a flow-enhanced high-efficiency superfine dry powder extinguishing agent, which comprises the following components in parts by weight:
base material: 90-93 parts of nano hydrophobic white carbon black: 6-8 parts of fluidity-promoting additive: 0.25 to 0.5 part of liquid phase modifier: 0.25 to 1.5 portions;
the base material comprises ammonium phosphate salt and/or bicarbonate; the fluidity promoting additive comprises perlite and/or bentonite.
In the invention, the base material is preferably ammonium phosphate salt and/or bicarbonate, sodium bicarbonate and ammonium dihydrogen phosphate are main fire extinguishing components in the fire extinguishing agent, and the higher the content is, the more efficient the fire extinguishing. However, high contents can lead to reduced flowability and moisture resistance, which can affect the performance of the fire extinguishing. The weight part of the base material is preferably 90-93 parts, more preferably 91-92 parts.
In the invention, the nano hydrophobic white carbon black is a common dampproof agent and a flow promoter, and the caking resistance and the fluidity of the superfine dry powder extinguishing agent can be improved simultaneously by mixing the nano hydrophobic white carbon black with the base material. When the liquid phase modifier is added, the adhesion of the nano white carbon black on the surface of the base material can be enhanced, and the modifying capability can be improved. In the present invention, the weight part of the nano hydrophobic white carbon black is preferably 6 to 8 parts, more preferably 7 to 8 parts.
In the present invention, the fluidity-promoting additive is preferably perlite and/or bentonite, and the particle size of the fluidity-promoting additive is preferably not more than 200. Mu.m. Perlite and bentonite are minerals with a layered structure. Through the research of the invention, the addition of the trace perlite and the bentonite can further improve the fluidity of the superfine dry powder extinguishing agent. The fluidity-promoting additive is preferably 0.25 to 0.5 part by weight, more preferably 0.3 to 0.45 part by weight, such as 0.25 part by weight, 0.3 part by weight, 0.35 part by weight, 0.4 part by weight, 0.45 part by weight, 0.5 part by weight, preferably a range having any of the above values as an upper limit or a lower limit.
In the present invention, the liquid phase modifier is preferably silicone oil and/or a silane coupling agent, and the weight part of the liquid phase modifier is preferably 0.25 to 1.5 parts, more preferably 0.5 to 1.2 parts, such as 0.25 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, preferably a range value in which any of the above values is an upper limit or a lower limit.
The invention also provides a preparation method of the flow-enhanced high-efficiency superfine dry powder extinguishing agent, which comprises the following steps:
a) Pulverizing the base material into D 90 Mixing the powder with the fluidity-promoting additive in a mixer for 1 to 5 minutes to obtain primary mixed powder;
b) Dispersing the liquid phase modifier in a solvent, fully contacting with the primary mixed powder in a spraying mode, and continuously mixing for 3-8 min after the spraying is finished;
c) Adding nano hydrophobic white carbon black, and mixing for 5-15 min;
d) And C) drying the mixed powder obtained in the step C) to obtain the flow enhanced high-efficiency superfine dry powder extinguishing agent.
The invention firstly carries out superfine grinding on the base material to D 90 And less than or equal to 10 mu m, which are well known to those skilled in the art, such as jet milling, ball milling, etc., and will not be described in detail herein.
The crushed base material and the fluidity-promoting additive are mixed in a mixer to obtain primary mixed powder, wherein the mixing time is preferably 1-5 min, more preferably 2-3 min. The linear rotation speed of the mixer is preferably 20m/s to 30m/s.
In order to improve the modifying effect of the liquid phase modifier, the modifier is diluted by a solvent, wherein the solvent is preferably one or more of ethanol, methanol and acetone, and the mass ratio of the liquid phase modifier to the solvent is preferably 1: (50 to 100), more preferably 1: (60-80).
Maintaining the rotation speed of the mixer, fully contacting the liquid phase modifier diluted by the solvent with the primary mixed powder in a high-speed mixing state in a spraying mode, and improving the modification efficiency. After the spray injection is completed, the mixing reaction is continued for 3 to 8 minutes, more preferably 5 to 6 minutes.
After adding the hydrophobic white carbon black, the linear speed of the mixer is adjusted to be 5-15 m/s, preferably 10m/s, the mixture is mixed for 1-3 min, preferably 2min, and the linear speed of the mixer is adjusted to be 20-30 m/s, and the mixture is mixed for 7-8 min to obtain mixed powder.
The invention preferably dries the obtained mixed powder to obtain the flow enhanced high-efficiency superfine dry powder extinguishing agent.
In the present invention, the drying may be spin drying, vacuum drying, etc., and the present invention is not particularly limited herein, and the temperature of the drying is preferably 50 to 90 ℃, more preferably 60 to 80 ℃, such as 50 ℃,55 ℃,60 ℃,65 ℃,70 ℃,75 ℃,80 ℃,85 ℃,90 ℃, preferably a range value in which any of the above values is an upper limit or a lower limit; the drying time is preferably 15 to 30 minutes, more preferably 20 to 25 minutes.
The invention provides a flow-enhanced high-efficiency superfine dry powder extinguishing agent, which comprises the following components in parts by weight: base material: 90-93 parts of nano hydrophobic white carbon black: 6-8 parts of fluidity-promoting additive: 0.25 to 0.5 part of liquid phase modifier: 0.25 to 1.5 portions; the base material comprises ammonium phosphate salt and/or bicarbonate; the fluidity promoting additive comprises perlite and/or bentonite. The invention can further improve the fluidity of the superfine dry powder extinguishing agent by adding a trace amount of perlite and/or bentonite into the high-content base material, the fluidity-enhanced high-efficiency superfine dry powder extinguishing agent has the effective extinguishing component accounting for 90% or more, the Carr fluidity index is more than 60, the strong fluidity and the high-efficiency extinguishing capability are provided, and the invention is more suitable for filling superfine dry powder extinguishing equipment.
In order to further illustrate the present invention, the following examples are provided to describe the dynamic enhanced type high efficiency superfine dry powder extinguishing agent and the preparation method thereof in detail, but the present invention is not to be construed as limiting the scope of protection.
The powder fluidity measurement method is many, the fluidity of the powder is simply predicted according to the repose angle and the compressibility of the powder for a long period of time, but the factors considered by the methods are single, the experience is strong, the fluidity is often not ideal in the actual unit operation, and the powder fluidity is difficult to describe well. Later, carr has proposed a comprehensive method for characterizing powder flow conditions by measuring 2800 powder samples, which is called the Carr fluidity index method. The Carr fluidity index method is a comprehensive evaluation method most commonly used in the current powder fluidity evaluation. The powder flowability is comprehensively evaluated by measuring 4 indexes of repose angle, compressibility, plate angle and uniformity of powder, namely, 25 points at the highest, converting the measurement result into points representing the degree of height, and then obtaining the total number by point addition as a flowability index FI. The method is suitable for powder with good fluidity, and is also suitable for powder with strong adhesiveness and poor fluidity, and is common in engineering application. In the following examples of the present invention, the flowability of the extinguishing agent was measured by the Carr flowability index method.
Example 1
A fluidity-enhanced high-efficiency superfine dry powder extinguishing agent comprises the following components: 93 parts of monoammonium phosphate, 6 parts of hydrophobic white carbon black, 0.5 part of bentonite and 0.5 part of silane coupling agent.
The preparation method comprises the following specific preparation steps:
s1) ultrafine grinding ammonium dihydrogen phosphate, and mixing with bentonite in a mixer for 2min;
s2) dispersing the fluorine-containing silane coupling agent in ethanol, and fully contacting the mixture powder through a spraying mode. After spraying, mixing for 5min;
s3) adding hydrophobic white carbon black, and mixing for 10min;
and S4) drying the powder obtained in the step of S4) at 90 ℃ to obtain a finished product.
The measured effective fire extinguishing component of the prepared superfine dry powder extinguishing agent is 93 percent, and the Carr fluidity index is 66.5.
Example 2
A fluidity-enhanced high-efficiency superfine dry powder extinguishing agent comprises the following components: 91 parts of monoammonium phosphate, 8 parts of hydrophobic white carbon black, 0.5 part of bentonite and 0.5 part of fluorine-containing silane coupling agent.
The preparation method comprises the following specific preparation steps:
s1) ultrafine grinding ammonium dihydrogen phosphate, and mixing with bentonite in a mixer for 2min;
s2) dispersing the fluorine-containing silane coupling agent in ethanol, and fully contacting the mixture powder through a spraying mode. After spraying, mixing for 5min;
s3) adding hydrophobic white carbon black, and mixing for 10min;
and S4) drying the powder obtained in the step of S4) at the temperature of 80 ℃ to obtain a finished product.
The measured effective fire extinguishing component of the prepared superfine dry powder extinguishing agent is 91 percent, and the Carr fluidity index is 66.
Example 3
A fluidity-enhanced high-efficiency superfine dry powder extinguishing agent comprises the following components: 90 parts of sodium bicarbonate, 8 parts of hydrophobic white carbon black, 0.5 part of bentonite and 1.5 parts of silicone oil.
The preparation method comprises the following specific preparation steps:
s1) ultrafine grinding sodium bicarbonate ammonium, and mixing with bentonite in a mixer for 2min;
s2) dispersing the silicone oil in methanol, and fully contacting the mixed powder by a spraying mode. After spraying, mixing for 5min;
s3) adding hydrophobic white carbon black, and mixing for 10min;
and S4) drying the powder obtained in the step of S4) at 70 ℃ to obtain a finished product.
The measured effective fire extinguishing component of the prepared superfine dry powder extinguishing agent is 90 percent, and the Carr fluidity index is 67.
Example 4
A fluidity-enhanced high-efficiency superfine dry powder extinguishing agent comprises the following components: 92 parts of sodium bicarbonate, 7 parts of hydrophobic white carbon black, 0.25 part of perlite and 0.75 part of silicone oil.
The preparation method comprises the following specific preparation steps:
s1) ultrafine grinding sodium bicarbonate, and mixing with perlite in a mixer for 2min;
s2) dispersing the silicone oil in acetone, and fully contacting the silicone oil with the mixed powder by a spraying mode. After spraying, mixing for 5min;
s3) adding hydrophobic white carbon black, and mixing for 10min;
and S4) drying the powder obtained in the step of S4) at the temperature of 60 ℃ to obtain a finished product.
The measured effective fire extinguishing component of the prepared superfine dry powder extinguishing agent is 92%, and the Carr fluidity index is 65.5.
Example 5
The formulation and preparation method in example 1 were followed to prepare ultrafine dry powder extinguishing agent, except that the weight parts of the nano hydrophobic white carbon black were 2 parts, 4 parts, 8 parts and 10 parts, respectively, and the corresponding weight parts of monoammonium phosphate were 97 parts, 95 parts, 91 parts and 89 parts, respectively.
The prepared superfine dry powder extinguishing agent has effective extinguishing components of 97%, 95%, 91% and 89%, and Carr fluidity indexes of 59.5, 60.5, 64.0 and 62.1 respectively as shown in figure 2.
Example 6
The formulation and the preparation method of the example 1 are used for preparing the superfine dry powder extinguishing agent, except that the weight fractions of bentonite are respectively 0.5 part, 1.0 part, 1.5 parts and 2.0 parts, and the corresponding weight fractions of ammonium dihydrogen phosphate are respectively 93 parts, 92.5 parts, 92 parts and 91.5 parts.
The prepared superfine dry powder extinguishing agent has effective extinguishing components of 93%, 92.5%, 92% and 91.5% respectively. The Carr flowability indexes are shown in FIG. 5 as 66.5, 61.0, 64.5 and 61.0, respectively.
Example 7
The formulation and the preparation method of the example 4 are used for preparing the superfine dry powder extinguishing agent, except that the weight fractions of the perlite are respectively 0.25 part, 0.5 part, 0.75 part, 1.0 part and 2.0 parts, and the corresponding weight fractions of the sodium hydrophosphate are respectively 92 parts, 91.75 parts, 91.5 parts, 91.25 parts and 90.25 percent.
The prepared superfine dry powder extinguishing agent has effective extinguishing components of 92%, 91.75%, 91.5%, 91.25% and 90.25% respectively. The Carr flowability indexes are 65.5, 62.0, 63.5 and 60.0, respectively, as shown in fig. 6.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A flow-enhanced high-efficiency superfine dry powder extinguishing agent comprises the following components in parts by weight:
base material: 90-93 parts of nano hydrophobic white carbon black: 6-8 parts of fluidity-promoting additive: 0.25 to 0.5 part of liquid phase modifier: 0.25 to 1.5 portions;
the base material comprises ammonium phosphate salt and/or bicarbonate; the fluidity promoting additive comprises perlite and/or bentonite.
2. The flow-enhanced high-efficiency ultrafine dry powder extinguishing agent according to claim 1, wherein the liquid phase modifier comprises silicone oil and/or a silane coupling agent.
3. The flow-enhanced high-efficiency ultrafine dry powder extinguishing agent according to claim 1, wherein the flow-enhancing additive has a particle size of 200 μm or less.
4. A method for preparing the flow-enhanced high-efficiency ultrafine dry powder extinguishing agent according to any one of claims 1 to 3, comprising the following steps:
a) Pulverizing the base material into D 90 Mixing the powder with the fluidity-promoting additive for 1 to 5 minutes to obtain primary mixed powder;
b) Dispersing the liquid phase modifier in a solvent, fully contacting with the primary mixed powder in a spraying mode, and continuously mixing for 3-8 min after the spraying is finished;
c) Adding nano hydrophobic white carbon black, and mixing for 5-15 min;
d) And C) drying the mixed powder obtained in the step C) to obtain the flow enhanced high-efficiency superfine dry powder extinguishing agent.
5. The method according to claim 4, wherein the solvent in the step B) is one or more of ethanol, methanol and acetone.
6. The preparation method according to claim 5, wherein the mass ratio of the liquid phase modifier to the solvent is 1: (50-100).
7. The process according to claim 4, wherein the temperature of the mixing in step A), step B) and step C) is 60 to 80 ℃.
8. The method according to claim 4, wherein the drying temperature in the step D) is 50 to 90℃and the drying time is 15 to 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310954005.7A CN116966469A (en) | 2023-07-28 | 2023-07-28 | Flow-enhanced high-efficiency superfine dry powder extinguishing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310954005.7A CN116966469A (en) | 2023-07-28 | 2023-07-28 | Flow-enhanced high-efficiency superfine dry powder extinguishing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116966469A true CN116966469A (en) | 2023-10-31 |
Family
ID=88476341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310954005.7A Pending CN116966469A (en) | 2023-07-28 | 2023-07-28 | Flow-enhanced high-efficiency superfine dry powder extinguishing agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116966469A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315822A (en) * | 1969-05-14 | 1973-05-02 | Atomic Energy Authority Uk | Powder fire extinguisher |
| RU2216371C2 (en) * | 2001-07-03 | 2003-11-20 | Закрытое акционерное общество "ЭКОХИММАШ" | Powder fire-extinguishing composition and method of production thereof |
| CN1597024A (en) * | 2004-09-17 | 2005-03-23 | 四川大学 | Anti-refiring ultrafine ammonium phosphate dry chemical fire-extinguishing agent and its preparation method |
| CN105999606A (en) * | 2016-06-12 | 2016-10-12 | 杨根喜 | Ammonium phosphate high-effect superfine dry powder extinguishing agent and production method thereof |
| CN107837485A (en) * | 2017-11-10 | 2018-03-27 | 蚌埠市龙泰消防有限公司 | A kind of ABC ultra-fine dry powder extinguishing agents |
| CN109078288A (en) * | 2018-10-25 | 2018-12-25 | 中国科学技术大学 | A kind of anti-re-ignition BC class ultra-fine dry powder extinguishing agent and preparation method thereof |
| CN110038248A (en) * | 2019-05-09 | 2019-07-23 | 中国科学技术大学 | A method of anti-re-ignition ultra-fine dry powder extinguishing agent is prepared using polymer sol |
| CN112619020A (en) * | 2020-12-18 | 2021-04-09 | 中国民航大学 | Method for preparing rare earth element composite high-efficiency superfine powder fire extinguishing agent by spray drying method |
| WO2022036595A1 (en) * | 2020-08-19 | 2022-02-24 | 南京高昇消防药剂有限公司 | Abc dry powder fire extinguishant and preparation method therefor |
-
2023
- 2023-07-28 CN CN202310954005.7A patent/CN116966469A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315822A (en) * | 1969-05-14 | 1973-05-02 | Atomic Energy Authority Uk | Powder fire extinguisher |
| RU2216371C2 (en) * | 2001-07-03 | 2003-11-20 | Закрытое акционерное общество "ЭКОХИММАШ" | Powder fire-extinguishing composition and method of production thereof |
| CN1597024A (en) * | 2004-09-17 | 2005-03-23 | 四川大学 | Anti-refiring ultrafine ammonium phosphate dry chemical fire-extinguishing agent and its preparation method |
| CN105999606A (en) * | 2016-06-12 | 2016-10-12 | 杨根喜 | Ammonium phosphate high-effect superfine dry powder extinguishing agent and production method thereof |
| CN107837485A (en) * | 2017-11-10 | 2018-03-27 | 蚌埠市龙泰消防有限公司 | A kind of ABC ultra-fine dry powder extinguishing agents |
| CN109078288A (en) * | 2018-10-25 | 2018-12-25 | 中国科学技术大学 | A kind of anti-re-ignition BC class ultra-fine dry powder extinguishing agent and preparation method thereof |
| CN110038248A (en) * | 2019-05-09 | 2019-07-23 | 中国科学技术大学 | A method of anti-re-ignition ultra-fine dry powder extinguishing agent is prepared using polymer sol |
| WO2022036595A1 (en) * | 2020-08-19 | 2022-02-24 | 南京高昇消防药剂有限公司 | Abc dry powder fire extinguishant and preparation method therefor |
| CN112619020A (en) * | 2020-12-18 | 2021-04-09 | 中国民航大学 | Method for preparing rare earth element composite high-efficiency superfine powder fire extinguishing agent by spray drying method |
Non-Patent Citations (3)
| Title |
|---|
| LU G B;ZHAO J C;ZHOU Y T;ET AL: "Study on Flowability Enhancement and Performance Testing of Ultrafine Dry Powder Fire Extinguishing Agents Based on Application Requirements", FIRE-SWITZERLAND, vol. 7, no. 4, 30 April 2024 (2024-04-30) * |
| 刘慧敏;杜志明;韩志跃;杜欣;: "干粉灭火剂研究及应用进展", 安全与环境学报, no. 06, 25 December 2014 (2014-12-25) * |
| 赵军超: "飞机动力舱抗复燃超细干粉灭火剂的设计与制备研究", 中国博士学位论文全文数据库•工程科技Ⅰ辑, no. 2023, 15 March 2023 (2023-03-15) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104117342B (en) | A kind of surfactant-modified bentonite and preparation method thereof | |
| CN104194585A (en) | Graphene-modified resin powder coating and production process thereof | |
| CN108485470A (en) | A kind of preparation method of graphene epoxy zinc powder composite anticorrosion coating | |
| CN102585770B (en) | Railway breeze, Coal Transport dust suppressant and preparation method thereof | |
| CN103980801B (en) | A kind of zinc rich primer and preparation method thereof | |
| CN103525368B (en) | Dust suppressant, application and preparation method thereof, and method for suppressing coking coal powder transportation dust | |
| CN102531667B (en) | Building thermal insulation wall body material and preparation method thereof | |
| CN102532955B (en) | Method for preparing nano calcium carbonate coated fly ash ultrafine powder | |
| CN108285673A (en) | A kind of weather resistant low brightness paint powder | |
| CN108658502B (en) | Anti-mud agent for stabilizing reclaimed water and application method thereof | |
| CN116966469A (en) | Flow-enhanced high-efficiency superfine dry powder extinguishing agent and preparation method thereof | |
| CA2071103C (en) | An admixture for spray concrete and mortar and a method for the manufacture or spray concrete and mortar using this admixture | |
| CN106167362A (en) | A kind of alkaline residue water-retaining agent and preparation method and application | |
| CN109593395B (en) | High-strength fireproof flame-retardant putty powder and preparation process thereof | |
| CN107033651A (en) | A kind of coating composite prepared based on paint slag and its preparation method | |
| CN102060505A (en) | Preparation method of dolomite tailing bricks | |
| CN109517482A (en) | A kind of watersoluble plumbago alkene anticorrosive paint and preparation method thereof | |
| CN103642324A (en) | White bamboo charcoal purifying multifunctional high-end mercerized wall finish | |
| CN101786857A (en) | Graphite gluing product and manufacture method thereof | |
| CN110615683B (en) | Preparation method of additive for improving flowability of dry granulation powder of building ceramic | |
| CN100516161C (en) | Method of preventing powdered material from flying to the air and antidusting agent | |
| CN107189629A (en) | A kind of water wave sprills coating and preparation method thereof | |
| CN108624187A (en) | A kind of preparation method of carbon nano-structured enhancing blast resistant surface material | |
| CN104263022B (en) | Potassium silicate paint added with hydroxyl silsesquioxane and preparation method thereof | |
| CN103589304B (en) | A kind of High-leveling-properbright bright paint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |