CN212159079U - Organic liquid fire extinguishing agent concentration test device that puts out a fire - Google Patents
Organic liquid fire extinguishing agent concentration test device that puts out a fire Download PDFInfo
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Abstract
The invention discloses a fire extinguishing concentration test device and a test method for an organic liquid fire extinguishing agent, wherein the fire extinguishing concentration test device comprises: the air supply device is used for providing two paths of air passages, the first path of air passage is connected to the liquid fire extinguishing agent storage module, so that the first path of air can enter the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module for bubbling, and the second path of air passage is communicated with the combustion module; the liquid fire extinguishing agent storage module is communicated with the buffer module, so that the first path of air enters the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module and carries the fire extinguishing agent to enter the buffer module after bubbling; the buffer module is used for condensing and collecting the liquid fire extinguishing agent carried in the first path of air in the buffer module, and the mixed gas of the air and the gaseous fire extinguishing agent is regulated by the first regulating valve, mixed with the second path of air and enters the combustion module; and the combustion module is used for measuring the fire extinguishing concentration of the fire extinguishing agent. The invention has the advantages of stable flow, good repeatability, simple operation, accurate measurement and the like.
Description
Technical Field
The utility model relates to a fire extinguishing agent concentration detection of putting out a fire especially relates to an organic liquid fire extinguishing agent cup formula concentration test device that puts out a fire.
Background
The fire extinguishing agent can be divided into gas, liquid and solid according to national standard, ISO international standard and U.S. NFPA standard, wherein the gas fire extinguishing agent has the widest application range and occupies most markets. With the continuous improvement of the requirements of the international environmental protection organization, the requirement of developing an environment-friendly clean fire extinguishing agent is more and more urgent. The fire extinguishing agent containing fluoroketone and fluoroolefin is expected to replace the existing HCFCs and HFCs due to the characteristics of no damage to the ozone layer (ODP ═ 0), low greenhouse effect (GWP <150), low toxicity, no residue after fire extinguishing, environmental protection, easy storage and the like, and has recently begun to attract the attention of the international society.
The evaluation of the fire extinguishing performance index of the fire extinguishing agent is an important parameter for measuring the fire extinguishing performance of the fire extinguishing agent, and provides basic data and technical support for the design of an actual engineering fire extinguishing system. Therefore, it is necessary to scientifically, accurately, concisely and quickly test the fire extinguishing concentration of the fire extinguishing agent. At present, a cup type fire extinguishing burner test device is usually adopted for testing the fire extinguishing concentration of a gas fire extinguishing agent at home and abroad, the test can be carried out according to ISO 14520-1-2006 and GB/T20702 standards, but only the fire extinguishing agent which is gaseous at normal temperature can be tested, and for organic liquid fire extinguishing agents, such as novel researched and developed fire extinguishing agents containing fluoroketones, fluoroolefins and the like, the fire extinguishing agents are liquid at normal temperature and normal pressure due to relatively high boiling point, and the test cannot be carried out based on the existing cup type burner test device and test method. Therefore, the development of a cup-type fire extinguishing concentration test device and a test method suitable for the organic liquid fire extinguishing agent is urgently needed.
In order to accurately measure the cup fire extinguishing concentration of such organic liquid fire extinguishing agents, such as perfluoro-2-methyl-3-pentanone, 2-bromo-3, 3, 3-trifluoroolefin, etc., the prior art has made the following efforts:
chinese patents CN104749331A and CN106823227A respectively report a method and a test device for testing the critical fire extinguishing concentration of the organic liquid fire extinguishing agent, the test technology provided by the two patent methods are consistent in principle, namely, the liquid fire extinguishing agent is completely vaporized in different modes and then mixed with air for determination, one mode is a heating mode for vaporizing the liquid fire extinguishing agent, and the other mode is a heating mode for rapidly vaporizing the liquid fire extinguishing agent, but the vaporization modes of the two fire extinguishing agents have the problems that the vaporized gaseous fire extinguishing agent is not enough to supply, so that the flow of a gas path of the fire extinguishing agent is unstable, the temperature of the gas path is not uniformly controlled, the repeatability of the test result of the fire extinguishing concentration is poor, and the accuracy is low.
Therefore, the cup-type fire extinguishing concentration test device and the test method for the organic liquid fire extinguishing agent need to be redesigned, and the problems of non-uniform concentration and unstable flow rate of the vaporized organic liquid fire extinguishing agent are solved from the source by adopting a brand-new design idea and concept.
Disclosure of Invention
The utility model provides an organic liquid fire extinguishing agent concentration test device of putting out a fire, organic liquid fire extinguishing agent concentration test device of putting out a fire can accurately measure cup formula concentration of putting out a fire, and detects gas circuit flow stability, and the testing result repeatability is good, the accuracy is high, easy and simple to handle, high efficiency.
The utility model aims at realizing through the following technical scheme:
the utility model provides an organic liquid fire extinguishing agent concentration test device that puts out a fire, the concentration test device that puts out a fire includes:
the air supply device is used for providing two paths of air passages, the first path of air passage is connected to the liquid fire extinguishing agent storage module, so that the first path of air can enter the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module for bubbling, and the second path of air passage is communicated with the combustion module;
the liquid fire extinguishing agent storage module is communicated with the buffer module, so that the first path of air enters the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module and carries the fire extinguishing agent to enter the buffer module after bubbling;
the buffer module is used for condensing and collecting the liquid fire extinguishing agent carried in the first path of air in the buffer module, the mixed gas of the air and the gaseous fire extinguishing agent is regulated by the first regulating valve, then is mixed with the second path of air and enters the combustion module, and the buffer module comprises a buffer tank and a constant temperature cooler;
a combustion module for determining a fire extinguishing concentration of a fire extinguishing agent.
According to the above fire extinguishing concentration test device for the organic liquid fire extinguishing agent, preferably, the liquid fire extinguishing agent storage module comprises a liquid fire extinguishing agent storage container and a heater for heating the liquid fire extinguishing agent.
According to the above test device for the concentration of the organic liquid fire extinguishing agent in extinguishing fire, preferably, the air supply device is divided into two paths of air passages by a first three-way pipe fitting, the second path of air passage is merged with the first path of air passage at the outlet of the first regulating valve by a second three-way pipe fitting, and a second regulating valve and a first gas mass flowmeter are arranged between the first three-way pipe fitting and the second three-way pipe fitting.
According to the above test apparatus for fire extinguishing concentration of organic liquid fire extinguishing agent, optionally, the heater is a thermostatic water bath heater, and the temperature of the liquid fire extinguishing agent storage module is controlled to be higher than the temperature of the buffer module but lower than the boiling point of the fire extinguishing agent.
According to the above test apparatus for fire extinguishing concentration of organic liquid fire extinguishing agent, preferably, the temperature of the liquid fire extinguishing agent storage module is 20-40 ℃ higher than that of the buffer module.
According to the above test apparatus for fire extinguishing concentration of organic liquid fire extinguishing agent, optionally, the constant temperature cooler is a constant temperature water bath cooler, so that the saturated vapor pressure concentration of the fire extinguishing agent is greater than the fire extinguishing concentration at the temperature of the buffer module.
According to the above fire extinguishing concentration test device for the organic liquid fire extinguishing agent, preferably, the air supply device comprises an air storage container, a first stop valve and a pressure reducing valve which are connected in sequence.
According to the above test device for the fire extinguishing concentration of the organic liquid fire extinguishing agent, preferably, a second gas mass flow meter and a second stop valve are arranged on a pipeline between the first three-way pipe fitting and the liquid fire extinguishing agent storage module.
According to the above testing apparatus for fire extinguishing concentration of organic liquid fire extinguishing agent, preferably, the liquid fire extinguishing agent storage container is provided with a liquid charging port valve and a liquid discharging port valve, so that the liquid fire extinguishing agent can be conveniently added and discharged.
According to the above test device for the concentration of fire extinguishing by organic liquid fire extinguishing agent, preferably, the buffer module comprises a first buffer tank and a second buffer tank, and the inlet of the first buffer tank is a serpentine coil.
According to the above test device for the fire extinguishing concentration of the organic liquid fire extinguishing agent, preferably, the first buffer tank and the second buffer tank are both provided with a liquid discharge port valve.
The utility model discloses still provide above-mentioned arbitrary organic liquid fire extinguishing agent concentration test device's concentration test method of putting out a fire, the concentration test method of putting out a fire includes following step:
(A1) the air supply device provides two paths of air, the first path of air enters the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module to be bubbled, then carries the fire extinguishing agent to enter the buffer module to condense and collect the liquid fire extinguishing agent, and the obtained mixed gas of the first path of air and the gaseous fire extinguishing agent is mixed with the second path of air and then enters the combustion module;
(A2) adjusting the flow of the first path of gas to ensure that the flame in the combustion module is just extinguished;
(A3) and collecting gas in the combustion module when the flame is extinguished, and analyzing the volume fraction of the extinguishing agent in the collected gas by adopting a headspace gas chromatography-external standard method, namely the extinguishing concentration.
According to the method for testing the fire extinguishing concentration of the organic liquid fire extinguishing agent, preferably, the concentration of the fire extinguishing agent at the gas outlet of the first path of buffer module is controlled within 2min, and the deviation is not more than 0.2%, so that the stability and the accuracy of a test result are improved.
According to the method for testing the fire extinguishing concentration of the organic liquid fire extinguishing agent, the method preferably further comprises the following steps:
(B1) opening a heater of the liquid fire extinguishing agent storage module and a constant temperature cooler of the buffer module, controlling the temperature of the liquid fire extinguishing agent storage module to be 20-40 ℃ higher than that of the buffer module, wherein the highest temperature of the liquid fire extinguishing agent storage module is lower than the boiling point of the fire extinguishing agent, and the saturated vapor pressure concentration of the fire extinguishing agent of the buffer module is higher than the fire extinguishing concentration at the temperature of the buffer module;
the (B1) step is prior to the (A1) step.
According to the method for testing the fire extinguishing concentration of the organic liquid fire extinguishing agent, the method preferably further comprises the following steps:
(C1) and (4) adjusting the flow rate of the second path of gas, repeating the steps (A2) and (A3) to obtain the fire extinguishing concentration under different flow rates, and taking the average value of the fire extinguishing concentrations as the fire extinguishing concentration.
According to the method for testing the fire extinguishing concentration of the organic liquid fire extinguishing agent, preferably, the analysis of the fire extinguishing concentration by the headspace gas chromatography-external standard method comprises the following steps:
(D1) preparing fire extinguishing agent standards with different volume concentrations: calculating the preparation amount according to the temperature and the pressure in the experiment, and adding the liquid fire extinguishing agent with the mass m into the volume V0In the standard gas bag, the liquid fire extinguishing agent in the gas bag is fully aeratedThe method comprises the following steps of (1) converting standard gas with different concentrations into a headspace bottle by using a pneumatic pump, and sealing after sufficient replacement;
(D2) drawing external standard curves of fire extinguishing agent standards with different volume concentrations: analyzing the fire extinguishing agent standard products with different volume concentrations collected in the step (D1) by headspace gas chromatography, and drawing external standard curves according to peak areas and the volume concentrations of the fire extinguishing agents;
(D3) determining the fire extinguishing concentration of the liquid fire extinguishing agent: and collecting gas in the combustion module when reaching a fire extinguishing point in a headspace bottle by adopting the same sampling mode as the standard, fully replacing and sealing, and measuring the fire extinguishing concentration by adopting a headspace gas chromatography external standard method.
According to the method for testing the fire extinguishing concentration of the organic liquid fire extinguishing agent, optionally, in the step (D1), the fire extinguishing agent standard is prepared with different volume concentrations ranging from 1% to 10%, and the volume V of the standard air bag is0Any one of 2L, 3L and 5L is selected, and the sampling replacement time is 30-60 s.
According to the method for testing the fire extinguishing concentration of the organic liquid fire extinguishing agent, preferably, the mass m of the added liquid fire extinguishing agent is calculated according to the following formula (I):
wherein: m is the mass of the liquid extinguishing agent and the unit is g;
p is pressure in KPa during the experiment;
V0is the standard air bag volume, in units of L;
VSthe volume concentration of the fire extinguishing agent standard substance is expressed in unit of percent;
r is a gas constant with a value of 8.314 and has the unit of J/(mol.K);
t is temperature during the experiment and is expressed in K;
m is the molar mass of the liquid extinguishing agent and has the unit of g/mol.
According to the method for testing the fire extinguishing concentration of the organic liquid fire extinguishing agent, the correlation coefficient of the standard external standard curve drawn in the step (D2) is preferably greater than 0.995.
Compared with the prior art, the utility model has the following advantage:
(1) the utility model discloses an air tympanic bulla's mode obtains gaseous state fire extinguishing agent, and stable air mass flow makes gaseous state fire extinguishing agent can let in the combustion module with stable pressure and flow, has guaranteed the homogeneity of fire extinguishing agent concentration, and test result repeatability is good, has greatly practiced thrift test cost, has promoted the feasibility of test, has overcome the defect that the cup type combustor test device of prior art is only applicable to the gaseous fire extinguishing agent of survey;
(2) the utility model discloses gather the gas in the combustion module chimney when reaching the point of putting out a fire, adopt headspace gas chromatography-external standard method direct survey gaseous medium fire extinguishing agent concentration, improved test method's accuracy, the method is simple and convenient, easily operates, is suitable for popularization and application.
Drawings
Fig. 1 is a schematic structural diagram of an organic liquid fire extinguishing agent fire extinguishing concentration test device according to embodiment 1 of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and the embodiments, but the invention is not limited to these embodiments. It will be recognized by those skilled in the art that the present invention encompasses all alternatives, modifications, and equivalents as may be included within the scope of the claims.
Example 1
The embodiment provides an organic liquid fire extinguishing agent concentration test device that puts out a fire, and figure 1 shows the schematic structure of the concentration test device that puts out a fire of this embodiment, as shown in figure 1, the concentration test device that puts out a fire includes:
an air supply device 1 including an air storage container 11, a first shut valve 12, and a pressure reducing valve 13 connected in this order;
the air provided by the air supply device is divided into two paths by the first tee pipe 21, the first path of air enters the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module for bubbling, and the second path of air enters the combustion module by the second tee pipe 22;
a liquid fire extinguishing agent storage module 3 including a liquid fire extinguishing agent storage container 31 and a heater 32 heating the liquid fire extinguishing agent; the first path of air enters the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module for bubbling, and then enters the buffer module with the fire extinguishing agent;
a buffer module 4 comprising a first buffer tank 41, a second buffer tank 42 and a thermostat cooler 43 cooling the first and second buffer tanks; liquid fire extinguishing agent in the first path of air carrying fire extinguishing agent is condensed and collected in the buffer module, and the obtained mixed gas of air and gaseous fire extinguishing agent enters a second three-way pipe fitting through a first regulating valve 51;
and the combustion module 6 is a cup type combustor, is connected with the outlet of the second three-way pipe fitting and is used for measuring the fire extinguishing concentration of the fire extinguishing agent.
Further, a second regulating valve 52 and a first gas mass flowmeter 71 are arranged between the first tee pipe fitting and the second tee pipe fitting, and the fire extinguishing concentration under different air flow rates is measured through the regulation of the second regulating valve.
And a second gas mass flow meter 72 and a second stop valve 33 are arranged on a pipeline between the first three-way pipe fitting and the liquid fire extinguishing agent storage module.
Furthermore, the heater adopts a constant-temperature water bath heater, and the temperature of the liquid fire extinguishing agent storage module is controlled to be higher than that of the buffer module but lower than the boiling point of the fire extinguishing agent; preferably, the temperature of the liquid fire extinguishing agent storage module is 20-40 ℃ higher than that of the buffer module.
The cooler adopts a constant-temperature water bath cooler, so that the saturated vapor pressure concentration of the fire extinguishing agent is greater than the fire extinguishing concentration at the temperature of the buffer module.
Further, a third stop valve 34, a liquid filling port valve 35 and a liquid discharging port valve 36 are arranged on the liquid fire extinguishing agent storage container, so that the liquid fire extinguishing agent can be added and discharged conveniently.
Further, the inlet of the first buffer tank is a serpentine coil; the first buffer tank and the second buffer tank are respectively provided with a liquid discharge valve 44 and a liquid discharge valve 45.
The embodiment also provides a test method of the test device for the fire extinguishing concentration of the organic liquid fire extinguishing agent, which comprises the following steps:
(B1) opening a heater of the liquid fire extinguishing agent storage module and a constant temperature cooler of the buffer module, controlling the temperature of the liquid fire extinguishing agent storage module to be 20-40 ℃ higher than that of the buffer module, wherein the highest temperature of the liquid fire extinguishing agent storage module is lower than the boiling point of the fire extinguishing agent, and the saturated vapor pressure concentration of the fire extinguishing agent of the buffer module is higher than the fire extinguishing concentration at the temperature of the buffer module;
(A1) opening a first stop valve, a pressure reducing valve, a second stop valve and a third stop valve, dividing air provided by an air storage container into two paths, bubbling the first path of air into a liquid fire extinguishing agent storage container, mixing fire extinguishing agent droplets wrapped in condensed gas in the liquid fire extinguishing agent storage container with fire extinguishing agent droplets wrapped in condensed gas in a first buffer tank and a second buffer tank, and then feeding the mixture into a cup-type combustor; opening a second regulating valve to stabilize the air flow of the second path;
(A2) the flow of the first path of gas is adjusted by adjusting the opening of the first adjusting valve, so that flame in the cup-type combustor is just extinguished;
(A3) collecting gas in the cup-type burner when flame is extinguished, and analyzing the volume fraction of the extinguishing agent in the collected gas by adopting a headspace gas chromatography-external standard method, namely the extinguishing concentration.
In order to improve the stability of the test result, therefore: the concentration of the fire extinguishing agent at the gas outlet of the first path of buffer module is controlled within 2min, and the deviation is not more than 0.2%.
In order to improve the accuracy of the test result, the fire extinguishing concentration is measured for multiple times and an average value is taken, so that:
further, the fire extinguishing concentration test method further comprises the following steps:
(C1) and (4) adjusting the flow rate of the second path of gas, repeating the steps (A2) and (A3) to obtain the fire extinguishing concentration under different flow rates, and taking the average value of the fire extinguishing concentrations as the fire extinguishing concentration.
The method for analyzing the fire extinguishing concentration by the headspace gas chromatography-external standard method comprises the following steps:
(D1) preparing fire extinguishing agent standards with different volume concentrations: calculating the preparation amount according to the temperature and the pressure in the experiment, and adding the liquid fire extinguishing agent with the mass m into the volume V0In the standard gas bag, the liquid fire extinguishing agent in the gas bag is fully gasified, standard gas with different concentrations is pumped into a headspace bottle by a pneumatic pump, and the headspace bottle is sealed after full replacement; the prepared fire extinguishing agent standard substance has different volume concentration ranges of 1-10 percent and the standard air bag volume V0Any one of 2L, 3L and 5L is selected, and the sampling replacement time is 30-60 s;
(D2) drawing external standard curves of fire extinguishing agent standards with different volume concentrations: analyzing the fire extinguishing agent standard products with different volume concentrations collected in the step (D1) by headspace gas chromatography, and drawing an external standard curve according to peak areas and the volume concentrations of the fire extinguishing agent, wherein the correlation coefficient of the external standard curve is more than 0.995;
(D3) determining the fire extinguishing concentration of the liquid fire extinguishing agent: and collecting gas in the combustion module when reaching a fire extinguishing point in a headspace bottle by adopting the same sampling mode as the standard, fully replacing and sealing, and measuring the fire extinguishing concentration by adopting a headspace gas chromatography external standard method.
The mass m of the added liquid extinguishing agent is calculated according to the following formula (I):
wherein: m is the mass of the liquid extinguishing agent and the unit is g;
p is pressure in KPa during the experiment;
V0is the standard air bag volume, in units of L;
VSthe volume concentration of the fire extinguishing agent standard substance is expressed in unit of percent;
r is a gas constant with a value of 8.314 and has the unit of J/(mol.K);
t is temperature during the experiment and is expressed in K;
m is the molar mass of the liquid extinguishing agent and has the unit of g/mol.
Example 2
The utility model discloses application example of organic liquid fire extinguishing agent concentration test device that puts out a fire on test perfluor hexanone fire extinguishing agent of embodiment 1.
In this application example, the air storage container is the air storage steel bottle, the heater is the constant temperature water bath, the cooler is low temperature freezing water bath, and first governing valve and second governing valve adopt the needle valve.
The outlet of the air storage steel cylinder is connected with the second three-way pipe fitting through the first stop valve, the pressure reducing valve, the first three-way pipe fitting, the second needle valve and the first gas mass flow meter in sequence; a second stop valve and a second gas mass flow meter are arranged between the inlet of a liquid fire extinguishing agent storage container (which is arranged in a constant temperature water bath for heating) and the first three-way pipe fitting, and the outlet of the liquid fire extinguishing agent storage container is provided with a third stop valve and is sequentially connected with a first buffer tank (which is arranged in a low temperature freezing water bath), a second buffer tank (which is arranged in the low temperature freezing water bath), and a first needle valve which is connected with the second three-way pipe fitting; the second three-way pipe fitting is connected with the cup type burner.
The application example adopts a headspace gas chromatography to measure the fire extinguishing concentration of the perfluorohexanone, firstly obtains the external standard curves of perfluorohexanone standard samples with different concentrations, and comprises the following specific steps:
(1) preparing fire extinguishing agent standard products with different volume concentrations: respectively preparing perfluorohexanone fire extinguishing agent standard samples with different volume concentrations, wherein the experimental temperature is 22.5 ℃, the experimental temperature is normal pressure, calculating according to a formula (I), accurately adding perfluorohexanone fire extinguishing agent mass m (accurate to 0.1mg) into a standard gas bag with the volume of 5L, fully gasifying the liquid fire extinguishing agent in the gas bag, pumping standard gas with different concentrations into a headspace bottle by using a pneumatic pump, fully replacing for 60s, and sealing.
Wherein: m is the mass of the liquid extinguishing agent and the unit is g;
p is pressure in KPa during the experiment;
V0is the standard air bag volume, in units of L;
vs is the volume concentration of the standard sample of the fire extinguishing agent, and the unit is%;
r is a gas constant with a value of 8.314 and has the unit of J/(mol.K);
t is temperature during the experiment and is expressed in K;
m is the molar mass of the liquid extinguishing agent and has the unit of g/mol.
(2) Drawing external standard curves of the perfluorohexanone fire extinguishing agent with different volume concentrations: analyzing the perfluorohexanone fire extinguishing agent standard products with different volume concentrations collected in the step (1) by headspace gas chromatography, and drawing an external standard curve by peak area and volume concentration;
(3) and (3) cup-type fire extinguishing concentration determination of the perfluorohexanone fire extinguishing agent: and collecting the gas in the chimney when reaching the fire extinguishing point in a headspace bottle in the same sampling mode as the standard, fully replacing and sealing, and measuring the fire extinguishing concentration by adopting a headspace gas chromatography external standard method.
TABLE 1 preparation of perfluorohexanone standard samples of different concentrations and plotting of external standard curves
After obtaining the external standard curve, adopt the utility model discloses the organic liquid fire extinguishing agent cup formula concentration test device of putting out a fire carries out perfluor hexanone concentration of putting out a fire's survey, and concrete step is as follows:
firstly, putting a perfluorohexanone fire extinguishing agent into a liquid fire extinguishing agent storage container, opening a constant-temperature water bath, and controlling the temperature to be 40 ℃;
secondly, opening a low-temperature freezing water bath and controlling the temperature to be 8 ℃;
thirdly, opening a first stop valve at the outlet of the air storage steel cylinder, and adjusting a pressure reducing valve at the outlet of the steel cylinder to 0.5MPa to enable air to pass through a first three-way pipe;
fourthly, opening a second needle valve, and adjusting the air flow to be 10L/min to keep the reading of the first gas mass flowmeter stable;
fifthly, putting ethanol fuel into the cup-type burner, adjusting the upper liquid level of the fuel to be about 1mm lower than the cup mouth, igniting flame, and pre-burning for 60 s;
sixthly, opening a second needle valve, a second stop valve and a third stop valve on the liquid fire extinguishing agent storage container, so that air bubbles into the liquid fire extinguishing agent storage container and carries the fire extinguishing agent to sequentially pass through the first buffer tank and the second buffer tank;
and seventhly, mixing the first path of air, the gaseous fire extinguishing agent mixed gas and the second path of air through a second three-way pipe, introducing the mixed gas into the cup-type combustor, adjusting the opening degree of a first needle valve, just extinguishing the flame, recording the reading of a second gas mass flow meter, simultaneously opening a pneumatic pump, collecting gas in a chimney of the cup-type combustor when the flame is extinguished by adopting a headspace bottle, fully replacing for 60s, sealing, and quantitatively analyzing the volume fraction of the liquid fire extinguishing agent in the gas by using a headspace gas chromatography-external standard method, namely, the fire extinguishing concentration.
And eighthly, increasing the opening of the first needle valve, respectively readjusting the air flow to be 20L/min, 30L/min, 40L/min and 50L/min, keeping the reading of the first gas mass flow meter stable for at least 60s to ensure that the mixed gas of the liquid fire extinguishing agent and the air in the new proportion can reach the position of the combustion cup, repeating the fifth step and the seventh step, repeating the test for three times at each air flow, taking the average value of the fire extinguishing concentration of the fire extinguishing agent for three times, and taking specific test data as shown in the following table 2.
TABLE 2 cup fire extinguishing concentration experimental data (fuel: ethanol) for different air flow rates
Claims (9)
1. The utility model provides an organic liquid fire extinguishing agent concentration test device that puts out a fire which characterized in that: the fire extinguishing concentration test device comprises:
the air supply device is used for providing two paths of air passages, the first path of air passage is connected to the liquid fire extinguishing agent storage module, so that the first path of air can enter the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module for bubbling, and the second path of air passage is communicated with the combustion module;
the liquid fire extinguishing agent storage module is communicated with the buffer module, so that the first path of air enters the liquid fire extinguishing agent in the liquid fire extinguishing agent storage module and carries the fire extinguishing agent to enter the buffer module after bubbling;
the buffer module is used for condensing and collecting the liquid fire extinguishing agent carried in the first path of air in the buffer module, the mixed gas of the air and the gaseous fire extinguishing agent is regulated by the first regulating valve, then is mixed with the second path of air and enters the combustion module, and the buffer module comprises a buffer tank and a constant temperature cooler;
a combustion module for determining a fire extinguishing concentration of a fire extinguishing agent.
2. The fire extinguishing concentration testing apparatus of the organic liquid fire extinguishing agent according to claim 1, wherein: the liquid fire extinguishing agent storage module includes a liquid fire extinguishing agent storage container and a heater that heats the liquid fire extinguishing agent.
3. The fire extinguishing concentration testing apparatus of the organic liquid fire extinguishing agent according to claim 1, wherein: the air supply device is divided into two paths of air passages through a first three-way pipe fitting, the second path of air passage is converged with the first path of air passage at the outlet of the first regulating valve through a second three-way pipe fitting, and a second regulating valve and a first gas mass flowmeter are arranged between the first three-way pipe fitting and the second three-way pipe fitting.
4. The fire extinguishing concentration testing device of the organic liquid fire extinguishing agent according to claim 2, wherein: the heater adopts the water bath heater of thermostatic control, controls the temperature of liquid fire extinguishing agent storage module is higher than the buffer module, but is less than the fire extinguishing agent boiling point.
5. The fire extinguishing concentration testing device of the organic liquid fire extinguishing agent according to claim 4, wherein: the temperature of the liquid fire extinguishing agent storage module is 20-40 ℃ higher than that of the buffer module.
6. The fire extinguishing concentration testing apparatus of the organic liquid fire extinguishing agent according to claim 1, wherein: the constant-temperature cooler is a constant-temperature water bath cooler, so that the saturated vapor pressure concentration of the fire extinguishing agent is higher than the fire extinguishing concentration at the temperature of the buffer module.
7. The fire extinguishing concentration testing apparatus of the organic liquid fire extinguishing agent according to claim 1, wherein: the air supply device comprises an air storage container, a first stop valve and a pressure reducing valve which are connected in sequence.
8. The fire extinguishing concentration testing apparatus of the organic liquid fire extinguishing agent according to claim 3, wherein: and a second gas mass flow meter and a second stop valve are arranged on a pipeline between the first three-way pipe fitting and the liquid fire extinguishing agent storage module.
9. The fire extinguishing concentration testing apparatus of the organic liquid fire extinguishing agent according to claim 1, wherein: the buffer module comprises a first buffer tank and a second buffer tank, and an inlet of the first buffer tank is a serpentine coil.
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| CN101161309A (en) * | 2007-11-09 | 2008-04-16 | 北京海安高科消防技术有限公司 | Combined imputation type nitrogen gas fire extinguisher system apparatus |
| JP2010273964A (en) * | 2009-05-29 | 2010-12-09 | Miyata Ind Co Ltd | Method and apparatus for regenerating liquid fire extinguisher |
| FR3001292B1 (en) * | 2013-01-24 | 2017-10-27 | Airbus Operations Sas | METHOD AND DEVICE FOR MEASURING THE EXTINGUISHING AGENT CONCENTRATION IN A FIRE AREA |
| CN104749331B (en) * | 2015-04-27 | 2016-06-08 | 公安部天津消防研究所 | The clean chemistry critical extinguishing concentration method of testing of liquid extinguisher and assay device |
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| CN206531823U (en) * | 2017-01-25 | 2017-09-29 | 衢州峥嵘环保科技有限公司 | A kind of extinguishing chemical performance test apparatus |
| CN106823227B (en) * | 2017-03-17 | 2019-08-16 | 公安部天津消防研究所 | A kind of higher boiling gas extinguishing agent extinguishing concentration experimental rig and test method |
| CN208155957U (en) * | 2018-03-05 | 2018-11-27 | 南京都盟消防技术有限公司 | Perfluorethyl isopropyl ketone extinguishing chemical extinguishing concentration test device |
| CN212159079U (en) * | 2018-12-28 | 2020-12-15 | 浙江蓝天环保高科技股份有限公司 | Organic liquid fire extinguishing agent concentration test device that puts out a fire |
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