CN103252042A - Method for achieving 8B-level local fire extinguishment by controlling particle size of hexafluoropropane fog drops - Google Patents
Method for achieving 8B-level local fire extinguishment by controlling particle size of hexafluoropropane fog drops Download PDFInfo
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- CN103252042A CN103252042A CN2013101519321A CN201310151932A CN103252042A CN 103252042 A CN103252042 A CN 103252042A CN 2013101519321 A CN2013101519321 A CN 2013101519321A CN 201310151932 A CN201310151932 A CN 201310151932A CN 103252042 A CN103252042 A CN 103252042A
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Abstract
The invention provides a method for achieving 8B-level local fire extinguishment by controlling the particle size of hexafluoropropane fog drops. Controlling the particle size of the hexafluoropropane fog drops is the key condition for extinguishing fire of a hexafluoropropane local fire-extinguishing system. The method is high in fire-extinguishing success rate, good in fire-extinguishing effect, and wide in application range and application prospect, fills up the application and research blank of hexafluoropropane fire extinguishment at home and abroad, and lays the foundation in largely popularizing and using hexafluoropropane for carrying out local fire extinguishment.
Description
Technical field
The invention belongs to the fire prevention field, specifically is a kind ofly to reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size.
Background technology
At present outside the removing carbon dioxide system, other known gas extinguishing systems all can only adopt the application mode of total flooding, seek the same research work that can be used as the gas system of topical application with CO and systematically do not carry out as yet at present.
The history that industrially developed country uses gas extinguishing system early, nineteen twenties CO bring into use in the world, nineteen sixties is brought into use haloalkane extinguishing system.The extinguishing chemical that the early stage gas extinguishing system of China uses mainly is carbon tetrachloride and carbon dioxide.From 1964, China successively succeeded in developing Halon1301 (BTM) and Halon1211 (difluorochlobromo-methane) gas extinguishing agent of high-efficiency low-toxicity.Since the seventies in 20th century to the end of the eighties, Halon1211,1301 fire extinguishing systems obtain using more widely in occasions such as aircraft industry, industry and civil buildings.CO starts from 20th century the seventies approximately in the land application of China; be applied to the fire-fighting protection of rolling mill for metal and gas turbine the earliest; because it is more in vogue that Halon1211,1301 fire extinguishing systems are used, so the promotion and application of CO have been subjected to very big influence.But along with halon extinguishing agent is used constantly and enlarged, people also find the alkyl halide (chlorine fluorine hydrocarbon material) that discharges will cause the destruction to earth atmospheric ozone layer, the living environment of harm humans gradually in atmosphere.Therefore, Montreal protocol has been concluded in countries in the world, and industrially developed country such as American and Britain, day, method stopped to produce in 1994 and the strict use of controlling halon extinguishing agent.The Chinese government signed Montreal protocol in 1991, worked out " Chinese ODS is progressively eliminated national scheme " in 1992, and target is to stop production breathing out dragon 1301 at the beginning of stopping to produce Kazakhstan dragon 1211,2010 end of the year 2005.Also just therefore, CO and other are breathed out imperial alternative system and are just developed rapidly.
Along with various appearance in succession of breathing out the alternative extinguishing chemical of dragon, corresponding gas extinguishing system also grows up rapidly, nineteen ninety-five, China first cover low pressure carbon dioxide fire extinguishing systems passed through the ministerial level evaluation, China developed the first cover Fire-extinguishing System of Septenary-Fluorine Propane in 1997, China developed first cover mist (IG541) fire extinguishing system in 1998, China developed the first cover fluoroform fire extinguishing system in 1999, and China developed the first cover HFC-236fa fire extinguishing system in 2002.The gas extinguishing system that uses in China mainly contains at present: high-pressure carbon dioxide fire extinguishing system, low pressure carbon dioxide fire extinguishing systems, Fire-extinguishing System of Septenary-Fluorine Propane, mist (IG541) fire extinguishing system, fluoroform (HFC-23) fire extinguishing system, HFC-236fa (HFC-236fa) fire extinguishing system etc.China is except developing various pipe network fire extinguishing systems, also develop various no pipe network fire extinguishing systems, as cabinet type high-pressure carbon dioxide, low pressure CO 2, heptafluoro-propane, fluoroform, HFC-236fa extinguishing device and suspension type heptafluoro-propane, HFC-236fa extinguishing device.
The gas extinguishing system product obtains rapid development in recent years, in addition the reinforcement gradually of fire-fighting domain environmental consciousness.The design concept of system product is also along with the continuous expansion in system applies field is enriched and upgraded.System's variation that more becomes from the aspects such as structure of type, application form, composition, parts, and from aspects such as security, reliabilities all in continuous raising.Present telecommunications miniature self-service base station on duty, electric discharge machine, topical application zones such as film printing machine, local and total flooding acting in conjunction system is well used, and range of application constantly enlarges.The manufacturing enterprise of this type systematic is increased sharply to 15 families in 2009 by 2 families in 2006, now to the concern of this type of application mode also in continuous increase.This wherein HFC-236fa have the characteristics of total flooding and topical application concurrently; make it become market focus gradually; for the protection in little space, HFC-236fa system and device have absolute advantage, and the feasibility that the HFC-236fa extinguishing device is applied to the wind-powered electricity generation industry is also being inquired into by each manufacturing enterprise.But, all do not have concrete, deep research for application and the condition home and abroad of HFC-236fa fire extinguishing.
Carry out the gas extinguishing system standard at present and comprise Fire-extinguishing System of Septenary-Fluorine Propane, fluoroform fire extinguishing system, argon gas fire extinguishing system, fire extinguishing nitrogen system, argon gas fire extinguishing nitrogen system, mist (IG-541) fire extinguishing system for " gas extinguishing system and parts performance requirement and test method " (GA400-2002), the gas extinguishing system standard of new revision is not also listed the HFC-236fa fire extinguishing system wherein in; Contained the total flooding fire extinguishing design of Fire-extinguishing System of Septenary-Fluorine Propane, IG541 mist fire extinguishing system and condensed aerosol fire extinguishing device in the middle of " gas extinguishing system design specification " (GB50370-2005).Therefore also not at standard or the standard of HFC-236fa, be badly in need of filling up this blank, for the rational Application of system and better the performance extinguishing property escort.Under the pressure of the too wide pressure of range of application, Henan Province write the engineering construction standard DBJ 41/T082-2008 of Henan Province " suspension type HFC-236fa extinguishing device technical regulation " in 2008.And in the middle of " HFC-236fa extinguishing chemical " national standard working out, be in the declaration stage at present.Can predict, the application of HFC-236fa is along with deepening continuously of every planning standard, application technical research will have more wide application space.
Summary of the invention
In order to solve the problems of the technologies described above, to the invention provides and a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size.
The HFC-236fa gas extinguishing agent is gas extinguishing agent colourless, tasteless, insulation, and its density is about 5 times of air.The fire extinguishing of HFC-236fa gas extinguishing agent is aided with inhibition based on the physics fire extinguishing.The technical characteristic of HFC-236fa gas extinguishing agent sees Table 1.
Table 1 HFC236fa technical performance
The physical characteristic of HFC-236fa gas extinguishing agent sees Table 2.
Table 2 HFC236fa physical property
Of the present inventionly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 319.90-586.66 μ m, D(V, 0.1) be 208.99-399.69 μ m, D(V, 0.9) be 379.67-721.97 μ m, D(V, 0.99) be 401.41-752.90 μ m.
Describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 361.02-541.54 μ m, D(V, 0.1) be 242.27-363.41 μ m, D(V, 0.9) be 451.06-676.58 μ m, D(V, 0.99) be 471.32-706.98 μ m.
Describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 402.15-493.41 μ m, D(V, 0.1) be 265.56-333.12 μ m, D(V, 0.9) be 502.44-620.20 μ m, D(V, 0.99) be 523.24-641.07 μ m.
Describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 421.72-479.84 μ m, D(V, 0.1) be 289.70-312.98 μ m, D(V, 0.9) be 530.63-597.01 μ m, D(V, 0.99) be 552.69-623.61 μ m.
Describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that described method adopts suspension type HFC-236fa extinguishing device, the consumption of HFC-236fa is 0.5kg, adopts vertical direction to spray injecting time≤10s.
Describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that adopting in the described method operating pressure of 0.4MPa～0.6MPa.
Describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, the diameter that it is characterized in that the food tray that adopts in the described method is 570 ± 10mm, internal depth is 150 ± 5mm, minimum wall thickness (MINI W.) is 2mm, the fuel oil volume is 8L, wherein water accounts for 1/3, and motor petrol accounts for 2/3, and prespark period is 1min.
Of the present inventionly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, clear and definite will control the mist droplet particle size of HFC-236fa as the key condition of putting out a fire in the fire extinguishing system of HFC-236fa part, this method fire extinguishing success rate height, good extinguishing effect, applied range, have a extensive future, application and the research of having filled up domestic and international HFC-236fa fire extinguishing are blank, use HFC-236fa to carry out the part fire extinguishing for large-scale promotion and lay the foundation.
Description of drawings
Fig. 1 is the schematic diagram of the fire-extinguishing test model of 1 shower nozzle of the present invention;
Fig. 2 is the schematic diagram of the fire-extinguishing test model of 2 shower nozzles of the present invention;
Among the figure, 1-hanged extinguishing equipment; 2-nozzle; 3-food tray.
The specific embodiment
In May, 2012, under normal outdoor conditions, carry out 8B rank fire-extinguishing test 15 times according to different shower nozzle quantity, nozzle quantity, setting height(from bottom) (pasta is to the height of nozzle), charge pressure, experimental condition all satisfies category-B fire test among GB4351.1-2005 and the GA602-2006 and the standard of topical application fire-extinguishing test, be that wind speed is not more than 3m/s, do not rain, snow or bad weather such as hailing, environment temperature-40 ℃-55 ℃, relative humidity 45%-75%, atmospheric pressure 86KPa-106KPa.Adopt suspension type HFC-236fa extinguishing device (Hangzhou fire-fighting equipment Co., Ltd, model XQLW1/0.5), the consumption of HFC-236fa is 0.5kg, use standard atomizer, nozzle is circular, and diameter 21mm is equilateral 3 dihedrals and is evenly equipped with 3 commentaries on classics cores on the nozzle, from being 4.62mm, the diameter of commentaries on classics core front end spray orifice is 2mm to the distance of center circle of nozzle in the center of circle of changeing core.The wherein test of 2 nozzles of 1 shower nozzle, what use is shower nozzle with 2 nozzles, the anterior end cap of nozzle boss is circular, diameter is 80mm, 2 shower nozzles are symmetricly set on the both sides in the end cap center of circle, the nozzle center of circle is 15mm to the distance in the shower nozzle end cap center of circle, and shower nozzle places directly over the center of circle of food tray; The test of 4 nozzles of 1 shower nozzle, what use is shower nozzle with 4 nozzles, the anterior end cap of nozzle boss is circular, diameter is 80mm, 4 shower nozzles be arranged on symmetrically and evenly the end cap center of circle around, the nozzle center of circle is 22mm to the distance in the shower nozzle end cap center of circle, and shower nozzle places directly over the center of circle of food tray; The test of 8 nozzles of 2 shower nozzles, use be 2 respectively with the shower nozzle of 4 nozzles, the anterior end cap of nozzle boss is circular, diameter is 80mm, 4 shower nozzles be arranged on symmetrically and evenly the end cap center of circle around, the nozzle center of circle is 22mm to the distance in the shower nozzle end cap center of circle, 2 shower nozzles are arranged on the food tray top, 2 sprinkler height are identical, and 2 shower nozzles are apart from 40cm, the line mid point in 2 shower nozzle centers of circle be positioned at the food tray center of circle directly over.Setting height(from bottom) and the operating pressure in the certain limit adopted in test, is in order both to satisfy in the national standard about the requirement of effective extinguishing medium amount and injecting time, prevents the fuel influence fire extinguishing of splashing again.The 8B rank fire-extinguishing test model of regulation among GB4351.1-2005 and the GA602-2006 is adopted in test, this model is the circular discs that steel plate is made, and diameter is 570mm, and internal depth is 150mm, wall thickness is 2mm, the fuel oil volume is 8L, and wherein water accounts for gasoline 2/3 1/3, No. 93, in food tray, add water earlier, make the food tray bottom all awash, add gasoline again and light pre-burning 1min.Namely begin fire extinguishing after pre-burning finishes, adopt vertical direction to spray, injecting time all is no more than 10 seconds.According to GB4351.1-2005, do not occur resume combustion after the fray-out of flame in the 1min, and remain gasoline in addition in the dish, then put out a fire successfully, test all repeating 3 times according to the same terms at every turn, put out a fire successfully for 2 times if wherein have, then satisfy 8B rank part extinguishment requirement.Measure the mist droplet particle size D(V of the HFC-236fa of each test after the off-test according to identical fire-extinguishing test condition, 0.5), D(V, 0.1), D(V, 0.9), D(V, 0.99), and get its mean value, wherein D is droplet percent by volume characteristic diameter (GB5135.3-2003), D(V, 0.5) namely represent in the spraying liquid cumulative volume, percentage at the shared volume of the following droplet of this diameter is 50%, D(V, 0.1) namely representing in the spraying liquid cumulative volume, is 10% at the percentage of the shared volume of the following droplet of this diameter, D(V, 0.9) namely represent in the spraying liquid cumulative volume, be 90%, D(V at the percentage of the shared volume of the following droplet of this diameter, 0.99) namely represent in the spraying liquid cumulative volume, be 99% at the percentage of the shared volume of the following droplet of this diameter.
Result of the test is as shown in table 3:
Table 3 8B rank fire-extinguishing test result
By result of the test as can be seen, the key of influence fire extinguishing success or not is the mist droplet particle size of HFC-236fa, all little with the correlation of shower nozzle or nozzle quantity, setting height(from bottom), charge pressure etc., in any case adjustment test parameters, as long as the mist droplet particle size of HFC-236fa is controlled in scope of the present invention, can realize successfully putting out a fire, satisfy the requirement of the local fire extinguishing of 8B rank.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all is included within protection scope of the present invention.
Claims (7)
1. one kind reaches the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 319.90-586.66 μ m, D(V, 0.1) be 208.99-399.69 μ m, D(V, 0.9) be 379.67-721.97 μ m, D(V, 0.99) be 401.41-752.90 μ m.
2. as claimed in claim 1ly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 361.02-541.54 μ m, D(V, 0.1) be 242.27-363.41 μ m, D(V, 0.9) be 451.06-676.58 μ m, D(V, 0.99) be 471.32-706.98 μ m.
3. as claimed in claim 1ly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 402.15-493.41 μ m, D(V, 0.1) be 265.56-333.12 μ m, D(V, 0.9) be 502.44-620.20 μ m, D(V, 0.99) be 523.24-641.07 μ m.
4. as claimed in claim 1ly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that making the mist droplet particle size of HFC-236fa to meet the following conditions: D(V, 0.5) be 421.72-479.84 μ m, D(V, 0.1) be 289.70-312.98 μ m, D(V, 0.9) be 530.63-597.01 μ m, D(V, 0.99) be 552.69-623.61 μ m.
As in the claim 1 to 4 any one describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that described method adopts suspension type HFC-236fa extinguishing device, the consumption of HFC-236fa is 0.5kg, adopt vertical direction to spray injecting time≤10s.
As in the claim 1 to 4 any one describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, it is characterized in that adopting in the described method operating pressure of 0.4MPa～0.6MPa.
As in the claim 1 to 4 any one describedly a kind ofly reach the local method for extinguishing fire of 8B rank by control HFC-236fa mist droplet particle size, the diameter that it is characterized in that the food tray that adopts in the described method is 570 ± 10mm, internal depth is 150 ± 5mm, minimum wall thickness (MINI W.) is 2mm, the fuel oil volume is 8L, wherein water accounts for 1/3, and motor petrol accounts for 2/3, and prespark period is 1min.
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| JP2009082222A (en) * | 2007-09-27 | 2009-04-23 | Fenwall Controls Of Japan Ltd | Fire extinguishing agent jetting apparatus |
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| TWI450744B (en) * | 2009-12-31 | 2014-09-01 | Yue San Enterpr Co Ltd | Fixed fire extinguishing system |
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Patent Citations (3)
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|---|---|---|---|---|
| JP2009082222A (en) * | 2007-09-27 | 2009-04-23 | Fenwall Controls Of Japan Ltd | Fire extinguishing agent jetting apparatus |
| TWI450744B (en) * | 2009-12-31 | 2014-09-01 | Yue San Enterpr Co Ltd | Fixed fire extinguishing system |
| CN202538213U (en) * | 2012-04-27 | 2012-11-21 | 北京久久神龙消防器材有限公司 | Atomizer and fire extinguisher with same |
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| 刘江虹等: "细水雾抑制小尺度甲烷/空气火焰的研究", 《北京理工大学学报》, vol. 33, no. 4, 15 April 2013 (2013-04-15), pages 416 - 420 * |
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