CN108815787A - A kind of core-shell structure extinguishing chemical and preparation method thereof for metallic sodium fire - Google Patents
A kind of core-shell structure extinguishing chemical and preparation method thereof for metallic sodium fire Download PDFInfo
- Publication number
- CN108815787A CN108815787A CN201810980355.XA CN201810980355A CN108815787A CN 108815787 A CN108815787 A CN 108815787A CN 201810980355 A CN201810980355 A CN 201810980355A CN 108815787 A CN108815787 A CN 108815787A
- Authority
- CN
- China
- Prior art keywords
- fire
- extinguishing chemical
- metallic sodium
- expanded graphite
- shell structure
- 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
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
- A62D1/0064—Gels; Film-forming compositions
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 core-shell structure extinguishing chemical and preparation method thereof that the invention discloses a kind of for metallic sodium fire, is made of by mass percentage following composition：Expanded graphite：60.0~85.0%；Binder：1.0~8.0%；Covering：15.0~35.0%.Extinguishing chemical powder particle prepared by the present invention is sprayed on metallic sodium fire, expanded graphite can quickly reduce the temperature of metallic sodium due to its good conductive force；Meanwhile covering therein can form fine and close film on the metallic sodium surface of burning, be allowed to the air exclusion with surrounding, play the role of fire smothering.Therefore its fire-fighting efficiency improves a lot than single graphite composite powder, can achieve the effect quickly thoroughly put out a fire.
Description
Technical field
The present invention relates to hazardous chemical fire fire-fighting field, in particular to a kind of core-shell structure for metallic sodium fire goes out
Fiery agent and preparation method thereof.
Background technique
Metallic sodium is a kind of common chemicals, is widely used in the halide reduction of zirconium, niobium, tantalum, sodium vapor lamp electric light source, with
And the fields such as alloy manufacture, the coolant of nuclear reactor and heat exchanging agent.Metallic sodium have very strong reproducibility, in air by
Heat or chance water reaction are easy to happen burning, thus have very high fire risk.In addition, meeting water due to metallic sodium can occur strongly
Chemical reaction, so metallic sodium fire cannot be put out a fire with water-based extinguishing agent.
Currently used metallic sodium extinguishing chemical mainly has sodium chloride dry powder, sodium carbonate dry powder, expanded graphite powder and liquid nitrogen etc..
Wherein, expanded graphite powder extinguishing chemical is since its is nontoxic, non-corrosive, and fire-fighting efficiency is higher and is widely used.Graphite conduct
Extinguishing chemical, cardinal principle are to be reduced the temperature of sodium using the good thermal conductivity of graphite, but must cover centainly in fire extinguishing
Otherwise the graphite powder of thickness has the graphite composite powder of the loose covering of air permeable, so that asphyxiating is not strong and causes fire extinguishing not thorough
Bottom, the easy re-ignition of sodium fire.
Summary of the invention
The present invention is to provide that a kind of fire-fighting efficiency is high, fire extinguishing is thorough to avoid above-mentioned existing deficiencies in the technology
Bottom and the environmental-friendly core-shell structure extinguishing chemical for metallic sodium fire.
The present invention adopts the following technical scheme that in order to solve the technical problem：
A kind of core-shell structure extinguishing chemical for metallic sodium fire, the extinguishing chemical are made of by mass percentage following component：
Expanded graphite：60.0~85.0 %；
Binder：1.0~8.0 %；
Covering：15.0~35.0%
Further scheme, the binder is in hydroxyl melamine, phenolic resin, hydroxymethyl cellulose and polyvinyl alcohol
It is a kind of.
Further scheme, the covering in odium stearate, magnesium stearate, talcum powder, mica powder, sodium chloride extremely
Few one kind.
Further scheme, the expansion multiple of the expanded graphite are 100-300 times.
Another goal of the invention of the invention is to provide the preparation method of above-mentioned extinguishing chemical, first by binder system soluble in water
The adhesive solution for being 1.0~5.0% at mass percent concentration, adds expanded graphite and is stirred mixing, be then added
Covering continues to be uniformly mixed, and is finally drying to obtain grayish white powdery core-shell structure extinguishing chemical.
Further scheme, the revolving speed of the stirring are 1000~5000 revs/min；The drying is true at 105~120 DEG C
Sky is 2~4 hours dry.
Compared with the prior art, the present invention has the beneficial effect that：
1, metallic sodium fire extinguishing chemical of the invention be with expanded graphite and covering compound powder extinguishing chemical as main component,
Using the cementation of binder, the covering that will be provided with heated conjunctiva effect loads to the surface of expanded graphite, is formed with swollen
The powder particle for the core-shell structure that swollen graphite is core, covering is shell.
2, extinguishing chemical powder particle prepared by the present invention is discharged on metallic sodium fire, expanded graphite is led since its is good
Heat effect can quickly reduce the temperature of metallic sodium；Meanwhile covering can form the thin of densification on the metallic sodium surface of burning
Film is allowed to the air exclusion with surrounding, plays the role of fire smothering.So extinguishing chemical prepared by the present invention is put out a fire due to two kinds
Mechanism plays a role simultaneously, fire-fighting efficiency improves a lot than single graphite composite powder, can achieve and quickly thoroughly puts out a fire
Effect.
3, raw material used by extinguishing chemical of the invention is cheap and easy to get, nontoxic；And the fire extinguishing nontoxic corrosivity of product, it is right
It is environmental-friendly；In addition, extinguishing chemical preparation process of the invention is simple.
4, this extinguishing chemical is using expanded graphite as main base, still maintains the fundamental characteristics of graphite composite powder, good fluidity,
It easily sprays, is suitable for various powder jetting devices.
Specific embodiment
Embodiment 1：
Weigh 4.0 g（2.0%）Hydroxyl melamine is dissolved in 100 ml water and forms solution, then weighs 146.0 g（73%）It is swollen
Swollen graphite（Expansion multiple is 300）, the two is added hard in blender with 3000 turns of speed per minute stirring 5 minutes
Resin acid sodium 50.0g（25%）, stirring 3 minutes is continued with 3000 turns of speed per minute in blender, after taking-up at 120 DEG C
Vacuum drying 2 hours, can be obtained the metallic sodium fire extinguishing chemical of grayish white powdery core-shell structure.
150 g of extinguishing chemical manufactured in the present embodiment is fitted into the dry powder extinguisher tank of 1000ml, 0.2MPa is forced into, is sprayed
Mouth is 0.5m, nozzle bore 10mm apart from food tray center.In the round food tray that diameter is 40cm, metallic sodium 100g is added,
It is heated to after melting comprehensive catching fire, removes heating device；Powder nozzle alignment metallic sodium fire is sprayed, until open fire is put out
Stop dusting when going out, consumes dry powder 78g.It stands and re-ignition does not occur within 15min, after pushing sample aside, water spray has phenomenon on fire to go out
It is existing, it was demonstrated that still to have metallic sodium remaining.
Embodiment 2：
Weigh 16.0 g（8.0%）Hydroxymethyl cellulose, which is dissolved in 100 ml water, forms solution, then weighs 122.0 g（61.0%）It is swollen
Swollen graphite（Expansion multiple is 200）, the two in blender with 2000 turns of speed per minute stirring 5 minutes, add tristearin
Sour magnesium 62.0g（31.0%）, stirring 3 minutes is continued with 2000 turns of speed per minute in blender, at 105 DEG C after taking-up
Lower vacuum drying 4 hours, can be obtained the metallic sodium fire extinguishing chemical of grayish white powdery core-shell structure.
150g metallic sodium fire extinguishing chemical dry powder is fitted into the dry powder extinguisher tank of 1000ml, 0.2MPa, nozzle are forced into
It is 0.5m, nozzle bore 10mm apart from food tray center.In the round food tray that diameter is 40cm, 100g metallic sodium is added, adds
Heat removes heating device to after melting comprehensive catching fire；Powder nozzle alignment metallic sodium fire is sprayed, until open fire extinguishes
When stop dust, consume dry powder 94g.It stands and re-ignition does not occur within 15min, after pushing sample aside, water spray has phenomenon on fire to occur,
Proof still has metallic sodium remaining.
Embodiment 3：
Weigh 2.0g（1.0%）Phenolic resin, which is dissolved in 100ml water, forms solution, then weighs 160.0 g（80%）Expanded graphite
（Expansion multiple is 300）, the two is added into talcum powder in blender with 3000 turns of speed per minute stirring 5 minutes
38.0g（19%）Stirring 2 minutes is continued with 3000 turns of speed per minute in blender, is dried in vacuo at 120 DEG C after taking-up
2 hours, the metallic sodium fire extinguishing chemical of grayish white powdery core-shell structure can be obtained.
150g metallic sodium fire extinguishing chemical dry powder is fitted into the dry powder extinguisher tank of 1000 ml, 0.2MPa, nozzle are forced into
It is 0.5m, nozzle bore 10mm apart from food tray center.In the round food tray that diameter is 40cm, 100g metallic sodium is added, adds
Heat removes heating device to after melting comprehensive catching fire；Powder nozzle alignment metallic sodium fire is sprayed, until open fire extinguishes
When stop dust, consume dry powder 91g.It stands and re-ignition does not occur within 15min, after pushing sample aside, water spray has phenomenon on fire to occur,
Proof still has metallic sodium remaining.
Embodiment 4：
It weighs 6.0 g (3.0%) polyvinyl alcohol and is dissolved in 100 ml water and form solution, then weigh 152.0（76%）Expanded graphite
（Expansion multiple is 100）, the two is added into sodium chloride powder in blender with 4000 turns of speed per minute stirring 5 minutes
42.0g（21%）, stirring 2 minutes is continued with 4000 turns of speed per minute in blender, vacuum is dry at 120 DEG C after taking-up
Dry 2 hours, the metallic sodium fire extinguishing chemical of grayish white powdery core-shell structure can be obtained.
150g metallic sodium fire extinguishing chemical dry powder is fitted into the dry powder extinguisher tank of 1000 ml, 0.2MPa, nozzle are forced into
It is 0.5 m apart from food tray center, nozzle bore is 10 mm.In the round food tray that diameter is 40cm, 100g metallic sodium is added,
It is heated to after melting comprehensive catching fire, removes heating device；Powder nozzle alignment metallic sodium fire is sprayed, until open fire is put out
Stop dusting when going out, consumes dry powder 124g.It stands and re-ignition does not occur within 15min, after pushing sample aside, water spray has phenomenon on fire to go out
It is existing, it was demonstrated that still to have metallic sodium remaining.
Comparative example 1：
150.0g is not carried out to the expanded graphite of surface cladding processing（Expansion multiple is 300）It is packed into the dry powder extinguisher of 1000ml
In tank, it is forced into 0.2MPa, nozzle distance food tray center is 0.5 m, nozzle bore 10mm.The circle oil for being 40cm in diameter
In disk, 100g metallic sodium is added, is heated to after melting comprehensive catching fire, removes heating device；By powder nozzle to metalloid
Sodium fire is sprayed, until stopping dusting when open fire extinguishes, consumes dry powder 116.1g.The flames of anger in steel disk is dialled after standing 15 min
Sample is opened, still it can be seen that the sodium of red heat, shows not put out a fire thoroughly.
Comparative example 2：
150.0g is not carried out to the expanded graphite of surface cladding processing（Expansion multiple is 200）It is packed into the dry powder extinguisher of 1000ml
In tank, it is forced into 0.2MPa, nozzle distance food tray center is 0.5m, nozzle bore 10mm.In the circle that diameter is 40 cm
In food tray, 100g metallic sodium is added, is heated to after melting comprehensive catching fire, removes heating device；Powder nozzle is directed at gold
Belong to sodium fire to be sprayed, until stopping dusting when open fire extinguishes, consumes dry powder 133.2g.Sodium fire is still firing at visible number in steel disk
It burns, after 15 min, still it can be seen that the sodium of red heat, shows not put out a fire thoroughly.
Comparative example 3：
150.0g is not carried out to the expanded graphite of surface cladding processing（Expansion multiple is 100）It is packed into the dry powder extinguisher of 1000ml
In tank, it is forced into 0.2MPa, nozzle distance food tray center is 0.5m, nozzle bore 10mm.The circle oil for being 40 cm in diameter
In disk, 100g metallic sodium is added, is heated to after melting comprehensive catching fire, removes heating device；By powder nozzle to metalloid
Sodium fire is sprayed, until stopping dusting when open fire extinguishes, consumes dry powder 142.6g.Sodium fire is still burning at visible number in steel disk,
After 15 min, still it can be seen that the sodium of red heat, shows not put out a fire thoroughly.
From the point of view of above embodiments and comparative example, answer core-shell structure is formed by after expanded graphite progress surface cladding
It closes dry powder particles to significantly improve than uncoated preceding expanded graphite powder fire-fighting efficiency, and under same experiment condition, goes out
Fiery agent dosage is less, and it is more thorough to put out a fire.
Claims (6)
1. a kind of core-shell structure extinguishing chemical for metallic sodium fire, it is characterised in that：The extinguishing chemical presses quality by following composition
Percentage composition：
Expanded graphite：60.0~85.0 %；
Binder：1.0~8.0 %；
Covering：15.0~35.0%.
2. extinguishing chemical according to claim 1, it is characterised in that：The binder is selected from hydroxyl melamine, phenolic aldehyde tree
One of rouge, hydroxymethyl cellulose, polyvinyl alcohol.
3. extinguishing chemical according to claim 1, it is characterised in that：The covering is selected from odium stearate, magnesium stearate, cunning
At least one of mountain flour, mica powder, sodium chloride.
4. extinguishing chemical according to claim 1, it is characterised in that：The expansion multiple of the expanded graphite is 100-300 times.
5. the preparation method of extinguishing chemical as described in claim 1, it is characterised in that：Quality first is made by binder is soluble in water
The adhesive solution that percent concentration is 1.0~5.0%, adds expanded graphite and is stirred mixing, covering is then added
Continue to be uniformly mixed, is finally drying to obtain grayish white powdery core-shell structure extinguishing chemical.
6. preparation method according to claim 5, it is characterised in that：The revolving speed of the stirring is 1000~5000 revs/min；
The drying is dried in vacuo 2~4 hours at 105~120 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980355.XA CN108815787A (en) | 2018-08-27 | 2018-08-27 | A kind of core-shell structure extinguishing chemical and preparation method thereof for metallic sodium fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980355.XA CN108815787A (en) | 2018-08-27 | 2018-08-27 | A kind of core-shell structure extinguishing chemical and preparation method thereof for metallic sodium fire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108815787A true CN108815787A (en) | 2018-11-16 |
Family
ID=64150797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810980355.XA Pending CN108815787A (en) | 2018-08-27 | 2018-08-27 | A kind of core-shell structure extinguishing chemical and preparation method thereof for metallic sodium fire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108815787A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110433444A (en) * | 2019-08-12 | 2019-11-12 | 黑龙江科技大学 | A kind of mining fireproof fire-extinguishing material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2159138C2 (en) * | 1998-12-23 | 2000-11-20 | Закрытое акционерное общество "ЭКОХИММАШ" | Multipurpose fire-extinguishing powder |
| CN101239228A (en) * | 2008-03-12 | 2008-08-13 | 昆明泰康集团有限公司 | Ammonium phosphate ultra-fine dry powder extinguishing agent and preparation thereof |
| CN103505841A (en) * | 2013-10-17 | 2014-01-15 | 中国人民武装警察部队学院 | Water-based extinguishing agent with solidification and foaming characteristics and preparation method |
| CN106928491A (en) * | 2017-03-13 | 2017-07-07 | 南京大学 | A kind of microencapsulation expansible graphite and its preparation method and the application in composite polyurethane rigid foam is prepared |
| CN107684684A (en) * | 2016-08-04 | 2018-02-13 | 天津盛安消科科技有限公司 | A kind of metal class powder extinguishing agent |
| CN108355292A (en) * | 2017-12-28 | 2018-08-03 | 安徽云联智能科技有限公司 | A kind of ultra-fine dry powder extinguishing agent being evenly distributed |
-
2018
- 2018-08-27 CN CN201810980355.XA patent/CN108815787A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2159138C2 (en) * | 1998-12-23 | 2000-11-20 | Закрытое акционерное общество "ЭКОХИММАШ" | Multipurpose fire-extinguishing powder |
| CN101239228A (en) * | 2008-03-12 | 2008-08-13 | 昆明泰康集团有限公司 | Ammonium phosphate ultra-fine dry powder extinguishing agent and preparation thereof |
| CN103505841A (en) * | 2013-10-17 | 2014-01-15 | 中国人民武装警察部队学院 | Water-based extinguishing agent with solidification and foaming characteristics and preparation method |
| CN107684684A (en) * | 2016-08-04 | 2018-02-13 | 天津盛安消科科技有限公司 | A kind of metal class powder extinguishing agent |
| CN106928491A (en) * | 2017-03-13 | 2017-07-07 | 南京大学 | A kind of microencapsulation expansible graphite and its preparation method and the application in composite polyurethane rigid foam is prepared |
| CN108355292A (en) * | 2017-12-28 | 2018-08-03 | 安徽云联智能科技有限公司 | A kind of ultra-fine dry powder extinguishing agent being evenly distributed |
Non-Patent Citations (3)
| Title |
|---|
| 吴宏富等: "《中国粉体工业通鉴》", 31 August 2007, 中国建材工业出版社 * |
| 张端庆: "《火药用原材料性能与制备》", 31 January 1995, 北京理工大学出版社 * |
| 杨桂生等: "《中国战略性新兴产业. 新材料. 工程塑料》", 31 December 2017, 中国铁道出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110433444A (en) * | 2019-08-12 | 2019-11-12 | 黑龙江科技大学 | A kind of mining fireproof fire-extinguishing material and preparation method thereof |
| CN110433444B (en) * | 2019-08-12 | 2021-03-26 | 黑龙江科技大学 | Mine fireproof fire extinguishing material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2902077B1 (en) | Metallic oxysalt fire extinguishing composition | |
| WO2014044199A1 (en) | Phosphate fire-extinguishing composition | |
| CN103751940B (en) | Polynary D class powder extinguishing agent is in the application in magnesium metal and sodium metal fire of going out | |
| CN104511127B (en) | A kind of extinguishing chemical and preparation method thereof of D classes fire | |
| US5053146A (en) | Method for extinguishment of metal fire and fire extinguishing agent therefor | |
| CN108167016A (en) | A kind of composite micro-capsule retardant for preventing spontaneous combustionof coal and preparation method thereof | |
| CN108815787A (en) | A kind of core-shell structure extinguishing chemical and preparation method thereof for metallic sodium fire | |
| CN110117414B (en) | Polycarbonate composite material and preparation method thereof | |
| CN105110357B (en) | The method of flame retardant of magnesium hydroxide prepared by a kind of magnesium salt | |
| KR20220083140A (en) | Fire extinguishing powder for suppression of metal and metal-ion batteries and manufacturing method thereof | |
| CN109762444A (en) | A kind of preparation method of fire-resisting coating material | |
| CN108992827A (en) | A kind of preparation method of insulating corrosion aerosol extinguishing agent | |
| WO2019062076A1 (en) | Hot aerosol fire extinguishing composition and preparation method therefor | |
| CN107652740A (en) | A kind of aqueous transparent ancient building fire retarding wood protection coating and preparation method thereof | |
| CN106280564A (en) | A kind of preparation method of surface modified superfine magnesium hydroxide | |
| CN108905037A (en) | A kind of novel C FA gas extinguishing agent and its fire extinguishing system | |
| CN101455887B (en) | Dry powder extinguishing agent and manufacture method | |
| CN115192953A (en) | Organic-inorganic composite micro-tank fire extinguishing agent and preparation method thereof | |
| WO2019062075A1 (en) | Composite aerosol fire extinguishing agent and preparation method therefor | |
| CN112521916A (en) | Chemical compound type coolant for aerosol fire extinguishing product and preparation method thereof | |
| CN101134986A (en) | Passive granule alloy and preparation method thereof | |
| CN104190040B (en) | A kind of ABC ultra-fine dry powder extinguishing agents and preparation method thereof | |
| CN112190865A (en) | Low-temperature S-type fire extinguishing agent and preparation method thereof | |
| CN107684684A (en) | A kind of metal class powder extinguishing agent | |
| CN110105629A (en) | A kind of preparation method of smoke suppressant |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181116 |