CN103239825B - The method of 34B rank local fire extinguishment is reached by controlling HFC-236fa mist droplet particle size - Google Patents
The method of 34B rank local fire extinguishment is reached by controlling HFC-236fa mist droplet particle size Download PDFInfo
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Abstract
The invention provides a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, specify that the key condition of being put out a fire in HFC-236fa local fire extinguishment system by the mist droplet particle size controlling HFC-236fa, this method fire extinguishing success rate is high, good extinguishing effect, applied range, have a extensive future, the application and research having filled up domestic and international HFC-236fa fire extinguishing is blank, lays the foundation for large-scale promotion uses HFC-236fa to carry out local fire extinguishment.
Description
Technical field
The invention belongs to technical field of fire control, specifically a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size.
Background technology
Current removing carbon dioxide system is outer, other known gas extinguishing systems all can only adopt the application mode of total flooding, finds the research work that can be used as the gas system of topical application the same as CO2 extinguishment system and not yet systematically carries out at present.
The history of industrially developed country's application gas extinguishing system comparatively early, nineteen twenties CO2 extinguishment system bring into use in the world, nineteen sixties brings into use haloalkane extinguishing system.Extinguishing chemical mainly carbon tetrachloride and the carbon dioxide of the gas extinguishing system use that China is early stage.From 1964, China successively succeeded in developing Halon1301 (BTM) and Halon1211 (difluorochlobromo-methane) gas extinguishing agent of high-efficiency low-toxicity.To the end of the eighties from 20 century 70s, Halon1211,1301 fire extinguishing systems obtain applying more widely with the occasion such as civil buildings in aircraft industry, industry.CO2 extinguishment system about starts from 20th century the seventies in the land application of China; be applied to the fire-fighting protection of rolling mill for metal and gas turbine the earliest; because Halon1211,1301 fire extinguishing systems use more prevailing, so the promotion and application of CO2 extinguishment system receive very large impact.But along with halon extinguishing agent application constantly expands, people also find the alkyl halide (chlorine fluorine hydrocarbon material) discharged in an atmosphere gradually, will cause the destruction to earth atmospheric ozone layer, the living environment of harm humans.Therefore, Montreal protocol has been concluded in countries in the world, and American and Britain, day, Fa Deng industrially developed country stopped producing in 1994 and the strict use controlling halon extinguishing agent.The Chinese government endorsed Montreal protocol in 1991, within 1992, has worked out " Chinese ODS progressively eliminates national scheme ", and target will stop producing in the end of the year 2005 breathing out dragon 1211, stops producing and breathe out dragon 1301 at the beginning of 2010.Also just therefore, CO2 extinguishment system and other Halon Replacement systems are just developed rapidly.
Along with the appearance in succession of various Halon Replacement extinguishing chemical, corresponding gas extinguishing system also grows up rapidly, nineteen ninety-five China's first set low pressure carbon dioxide fire extinguishing systems have passed ministerial level qualification, within 1997, China develops first set Fire-extinguishing System of Septenary-Fluorine Propane, within 1998, China develops first set mist (IG541) fire extinguishing system, within 1999, China develops first set fluoroform fire extinguishing system, and within 2002, China develops first set HFC-236fa fire extinguishing system.The gas extinguishing system used in China at present mainly contains: 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 system, also develop various non-network fire extinguishing system, as cabinet type high-pressure carbon dioxide, low pressure CO 2, heptafluoro-propane, fluoroform, hexafluoro-propane extinguishing device and suspension type heptafluoro-propane, hexafluoro-propane extinguishing device.
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 of system application is enriched and upgraded.System is more variation from aspects such as the structures of type, application form, composition, parts, and from the aspect such as security, reliability all in continuous raising.Current telecommunications miniature self-service base station on duty, electric discharge machine, the topical application regions such as film press, local is well applied with total flooding acting in conjunction system, and range of application constantly expands.The manufacturing enterprise of this type systematic by 2 in 2006 increase sharply to 2009 15, now to the concern of this type of application mode also in continuous increase.This wherein HFC-236fa have the feature of total flooding and topical application concurrently; it is made to become market focus gradually; for the protection in little space, HFC-236fa system and device have absolute advantage, and feasibility hexafluoro-propane extinguishing device being applied to wind-powered electricity generation industry is also being inquired into by each manufacturing enterprise.But the application of putting out a fire for HFC-236fa and condition home and abroad all do not have concrete, deep research.
Current execution gas extinguishing system standard comprises 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), and HFC-236fa fire extinguishing system is not also listed in wherein by the gas extinguishing system standard of new revision; The total flooding extinguishing design of Fire-extinguishing System of Septenary-Fluorine Propane, IG541 mist fire extinguishing system and condensed aerosol fire extinguishing device is covered in the middle of " gas extinguishing system design specification " (GB50370-2005).Therefore also not for standard or the specification of HFC-236fa, be badly in need of filling up that this is blank, for system reasonable application and better play extinguishing property and escort.Under the pressure of the pressure that range of application is too wide, Henan Province write Henan Province engineering construction standard DBJ 41/T082-2008 " suspension type hexafluoro-propane 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 will have more wide application space along with every planning standard, deepening continuously of application technical research.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size.
HFC-236fa gas extinguishing agent is gas extinguishing agent that is colourless, tasteless, insulation, and its density is about 5 times of air.The fire extinguishing of HFC-236fa gas extinguishing agent, based on physics fire extinguishing, is aided with inhibition.The technical characteristic of HFC-236fa gas extinguishing agent is in table 1.
Table 1 HFC236fa technical performance
The physical characteristic of HFC-236fa gas extinguishing agent is in table 2.
Table 2 HFC236fa physical property
A kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size of the present invention, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 95.28-175.48 μm, D(V, 0.1) be 28.47-55.72 μm, D(V, 0.9) be 210.94-400.08 μm, D(V, 0.99) be 342.87-610.87 μm.
A kind of described method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 104.75-160.47 μm, D(V, 0.1) be 32.74-51.79 μm, D(V, 0.9) be 238.77-374.10 μm, D(V, 0.99) be 387.54-571.08 μm.
A kind of described method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 117.48-149.82 μm, D(V, 0.1) be 36.12-48.96 μm, D(V, 0.9) be 267.19-341.69 μm, D(V, 0.99) be 418.27-530.31 μm.
A kind of described method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 124.50-142.87 μm, D(V, 0.1) be 39.14-44.75 μm, D(V, 0.9) be 297.45-327.19 μm, D(V, 0.99) be 446.12-497.82 μm.
A kind of described method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, it is characterized in that described method adopts suspension type hexafluoro-propane extinguishing device, the consumption of HFC-236fa is 4kg, adopts vertical direction to spray, injecting time≤10s.
A kind of described method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, is characterized in that the operating pressure adopting 0.5MPa ~ 0.7MPa in described method.
A kind of described method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, it is characterized in that the diameter of the food tray adopted in described method is 1170 ± 10mm, internal depth is 150 ± 5mm, minimum wall thickness (MINI W.) is 2.5mm, fuel bulk is 34L, wherein water accounts for 1/3, and motor petrol accounts for 2/3, and prespark period is 1min.
The method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size of the present invention, specify that the key condition of being put out a fire in HFC-236fa local fire extinguishment system by the mist droplet particle size controlling HFC-236fa, this method fire extinguishing success rate is high, good extinguishing effect, applied range, have a extensive future, the application and research having filled up domestic and international HFC-236fa fire extinguishing is blank, lays the foundation for large-scale promotion uses HFC-236fa to carry out local fire extinguishment.
Accompanying drawing explanation
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;
In figure, 1-hanged extinguishing equipment; 2-nozzle; 3-food tray.
Detailed description of the invention
In May, 2012,34B rank fire-extinguishing test is carried out 15 times according to different shower nozzle quantity, nozzle quantity, setting height(from bottom) (pasta is to the height of nozzle), charge pressure under normal outdoor conditions, experimental condition all meets the standard of category-B fire test in GB4351.1-2005 and GA602-2006 and topical application fire-extinguishing test, namely wind speed is not more than 3m/s, do not rain, snow or the bad weather such as hailing, DEG C-55 DEG C, environment temperature-40, relative humidity 45%-75%, atmospheric pressure 86KPa-106KPa.Adopt suspension type hexafluoro-propane extinguishing device (Hangzhou fire-fighting equipment Co., Ltd, model XQLW6/4), the consumption of HFC-236fa is 4kg, use standard atomizer, nozzle is circular, diameter 21mm, nozzle is evenly equipped with 3 in equilateral 3 dihedrals and turns core, the center of circle turning core is to the distance of center circle of nozzle from being 4.62mm, and the diameter turning core front end spray orifice is 2mm.The wherein test of 1 shower nozzle, 2 nozzles, use the shower nozzle of band 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 is placed in directly over the center of circle of food tray; The test of 1 shower nozzle, 4 nozzles, use the shower nozzle of band 4 nozzles, the anterior end cap of nozzle boss is circular, diameter is 80mm, 4 shower nozzles are arranged on around the end cap center of circle symmetrically and evenly, the nozzle center of circle is 22mm to the distance in the shower nozzle end cap center of circle, and shower nozzle is placed in directly over the center of circle of food tray; The test of 2 shower nozzles, 8 nozzles, use 2 shower nozzles being with 4 nozzles respectively, the anterior end cap of nozzle boss is circular, diameter is 80mm, and 4 shower nozzles are arranged on around the end cap center of circle symmetrically and evenly, and 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 above food tray, 2 sprinkler height are identical, 2 shower nozzle distance 40cm, and the line mid point in 2 shower nozzle centers of circle is positioned at directly over the food tray center of circle.Setting height(from bottom) in test employing certain limit and operating pressure are the requirements in order to both meet about effective extinguishing medium amount and injecting time in national standard, prevent again fuel splash from affecting fire extinguishing.Test adopts the 34B rank fire-extinguishing test model of regulation in GB4351.1-2005 and GA602-2006, this model is the circular discs that steel plate is made, and diameter is 1170mm, and internal depth is 150mm, wall thickness is 2.5mm, fuel bulk is 34L, and wherein water accounts for 1/3, No. 93 gasoline 2/3, first add water in the oil pan, make bottom food tray all awash, then add gasoline and light, pre-burning 1min.Namely start fire extinguishing after pre-burning terminates, adopt vertical direction to spray, injecting time is all no more than 10 seconds.According to GB4351.1-2005, do not occur resume combustion after fray-out of flame in 1min, and remain gasoline in addition in dish, then put out a fire successfully, each test all repeats 3 times according to the same terms, puts out a fire successfully 2 times, then meet the requirement of 34B rank local fire extinguishment if wherein had.Measure the mist droplet particle size D(V of the HFC-236fa of each test according to identical fire-extinguishing test condition after off-test, 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 spraying liquid cumulative volume, shared by the following droplet of this diameter, the percentage of volume is 50%, D(V, 0.1) namely represent in spraying liquid cumulative volume, shared by the following droplet of this diameter, the percentage of volume is 10%, D(V, 0.9) namely represent in spraying liquid cumulative volume, shared by the following droplet of this diameter, the percentage of volume is 90%, D(V, 0.99) namely represent in spraying liquid cumulative volume, shared by the following droplet of this diameter, the percentage of volume is 99%.
Result of the test is as shown in table 3:
Table 3 34B rank fire-extinguishing test result
As can be seen from result of the test, the key of impact 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 Tests parameter, as long as the mist droplet particle size of HFC-236fa is controlled in scope of the present invention, can successful fire extinguishment be realized, meet the requirement of 34B rank local fire extinguishment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., be all included within protection scope of the present invention.
Claims (7)
1. one kind reaches the method for 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 95.28-175.48 μm, D(V, 0.1) be 28.47-55.72 μm, D(V, 0.9) be 210.94-400.08 μm, D(V, 0.99) be 342.87-610.87 μm.
2. a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size as claimed in claim 1, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 104.75-160.47 μm, D(V, 0.1) be 32.74-51.79 μm, D(V, 0.9) be 238.77-374.10 μm, D(V, 0.99) be 387.54-571.08 μm.
3. a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size as claimed in claim 1, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 117.48-149.82 μm, D(V, 0.1) be 36.12-48.96 μm, D(V, 0.9) be 267.19-341.69 μm, D(V, 0.99) be 418.27-530.31 μm.
4. a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size as claimed in claim 1, it is characterized in that the mist droplet particle size making HFC-236fa meets the following conditions: D(V, 0.5) be 124.50-142.87 μm, D(V, 0.1) be 39.14-44.75 μm, D(V, 0.9) be 297.45-327.19 μm, D(V, 0.99) be 446.12-497.82 μm.
5. as a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size in Claims 1-4 as described in any one, it is characterized in that described method adopts suspension type hexafluoro-propane extinguishing device, the consumption of HFC-236fa is 4kg, vertical direction is adopted to spray, injecting time≤10s.
6., as a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size in Claims 1-4 as described in any one, it is characterized in that the operating pressure adopting 0.5MPa ~ 0.7MPa in described method.
7. as a kind of method reaching 34B rank local fire extinguishment by controlling HFC-236fa mist droplet particle size in Claims 1-4 as described in any one, the diameter that it is characterized in that the food tray that fire-extinguishing test model in described method adopts is 1170 ± 10mm, internal depth is 150 ± 5mm, minimum wall thickness (MINI W.) is 2.5mm, fuel bulk is 34L, wherein water accounts for 1/3, and motor petrol accounts for 2/3, and prespark period is 1min.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367030A (en) * | 2002-03-01 | 2002-09-04 | 公安部上海消防科学研究所 | Mixed CO2 fire extinguisher |
| CN2605884Y (en) * | 2003-03-18 | 2004-03-10 | 南京消防器材股份有限公司 | Automatic hexafluoro-propane extinguisher |
| CN101371944A (en) * | 2008-08-22 | 2009-02-25 | 杭州新纪元安全产品有限公司 | Extinguishment product using clear gas as sponging agent as well as production method and fire-extinguishing system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367030A (en) * | 2002-03-01 | 2002-09-04 | 公安部上海消防科学研究所 | Mixed CO2 fire extinguisher |
| CN2605884Y (en) * | 2003-03-18 | 2004-03-10 | 南京消防器材股份有限公司 | Automatic hexafluoro-propane extinguisher |
| CN101371944A (en) * | 2008-08-22 | 2009-02-25 | 杭州新纪元安全产品有限公司 | Extinguishment product using clear gas as sponging agent as well as production method and fire-extinguishing system |
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