CN104849311B - Two-fluid inerting water mists inhibit pipeline gas explosion experimental provision and experimental method - Google Patents

Abstract

The invention relates to an experimental device and method for suppressing pipeline gas explosion by two-fluid inerting fine water mist, which can effectively solve the problem of the simulation experiment analysis of two-fluid inerting fine water mist suppressing pipeline gas explosion. The technical solution is to include transparent Plexiglass tube, water tank, inert gas bottle, air bottle and methane gas cylinder, the plexiglass tube is respectively provided with an air discharge tube connected with its inner cavity, and an air inlet tube connected with its inner cavity, and the sensing end extends into the inner cavity of the plexiglass tube The temperature sensor, the pressure sensor whose sensing end extends into the inner cavity of the plexiglass tube, the dual-fluid nozzle whose injection end extends into the inner cavity of the plexiglass tube, and the high-voltage pulse igniter whose ignition end extends into the inner cavity of the plexiglass tube, the experimental device of the present invention has a novel and unique structure , simple and reasonable, the experimental method is simple, the experimental process is stable and intuitive, the method of use is easy to operate and control, the atomization amount is realized by adjusting the pressure of the gas cylinder, and the explosion suppression effect is good.

Description

Two-fluid inerting fine water mist suppression pipeline gas explosion experimental device and experimental method

technical field

The invention relates to a fire safety experiment device, in particular to a two-fluid inerting fine water mist suppression pipeline gas explosion experiment device and an experiment method.

Background technique

Gas widely exists in coalbed methane, mine ventilation gas and chemical gas, and it often causes explosion disasters due to leakage in mine roadways, gas transmission pipelines and gas storage equipment, which has become one of the most concerned safety issues in my country. With the development of society, there are higher requirements for explosion suppression technology, that is, it is required to be environmentally friendly and non-polluting to the process medium while suppressing explosions. Therefore, it is imperative to study clean and efficient explosion suppression technologies.

Inert gas and fine water mist are common economical and environmentally friendly materials for fire extinguishing and explosion control. At present, the corresponding inert gas and water mist explosion suppression devices have preliminary applications in the fields of liquefied petroleum, natural gas storage tanks and pipeline transportation protection, underground gas explosion prevention and suppression in coal mines, etc. However, due to the high concentration of inert gas for explosion suppression and fire prevention, for example, the design concentration of CO ₂ fire extinguishing system is as high as 34%, and the O ₂ concentration index requirement for injection of N ₂ in the goaf to suppress gas explosion is less than 12%. A large number of high-pressure gas cylinder groups, complex pipelines, etc. are often required. The practice of fine water mist for explosion suppression is mainly single-fluid fine water mist (pure water mist), and its atomization is realized by controlling the level of water pressure and nozzle structure. High pressure power source, the effect of explosion suppression is affected by factors such as water mist particle size, concentration, length of water mist area, etc. These factors limit the application of inert gas and fine water mist explosion suppression technology.

Two-fluid inerting fine water mist refers to an explosion suppression method that delivers fine water mist and inert gas to water in explosive areas through a two-fluid nozzle. Previous studies have shown that fine droplets with a smaller specific surface area are more effective in suppressing explosions, and when inert gas is used as a dilution gas, the good spatial dispersion of the inert gas will speed up the dispersion and dispersibility of the droplets, and the comprehensive use of the inert gas Combined with the advantages of fine water mist explosion suppression, it produces a synergistic effect of explosion suppression. However, there is no report on the experimental device and experimental method for how to use the two-fluid inerting fine water mist to suppress the pipeline gas explosion.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a two-fluid inerting fine water mist suppression pipeline gas explosion experimental device and experimental method, which can effectively solve the problem of dual-fluid inerting fine water mist suppression pipeline Problems in gas explosion simulation experiment analysis.

The technical scheme that the present invention solves is,

A two-fluid inertized water mist suppression pipeline gas explosion experimental device, including a transparent plexiglass tube, a water tank, an inert gas bottle, an air bottle and a methane gas bottle, the plexiglass tube is a hollow structure with one end open, and its mouth is A PVC film for sealing is provided, and the plexiglass tube is respectively provided with an air discharge pipe connected to its inner cavity, an air intake pipe connected to its inner cavity, a temperature sensor whose sensing end extends into the inner cavity of the plexiglass tube, and a sensor end extending into the organic glass tube. The pressure sensor in the inner cavity of the glass tube, the dual-fluid nozzle whose injection end extends into the inner cavity of the plexiglass tube, and the high-voltage pulse igniter whose ignition end extends into the inner cavity of the plexiglass tube, the gas outlet of the inert gas bottle passes through the solenoid valve and the inlet of the dual-fluid nozzle The water outlet of the water tank is connected with the liquid inlet of the dual-fluid nozzle, the air outlet of the air bottle is connected with the air inlet of the air inlet pipe through the first check valve and the first mass flow controller connected in series, and the methane gas cylinder is connected through The second non-return valve and the second mass flow controller connected in series are connected to the air inlet of the intake pipe, and the high-voltage pulse igniter is provided with a sensing end facing the ignition electrode of the high-voltage pulse igniter. Sensor, the signal output end of the photoelectric sensor is connected with the signal input end of the camera, the signal output end of the camera, solenoid valve, temperature sensor and pressure sensor is respectively connected with the signal input end of the data acquisition instrument, and the signal output end of the data acquisition instrument is connected with the computer connected.

An experimental method for suppressing pipeline gas explosion by two-fluid inerting fine water mist, comprising the following steps:

1. Install the test device. The test device includes a transparent plexiglass tube, a water tank, an inert gas cylinder, an air cylinder and a methane gas cylinder. The plexiglass tube is a hollow structure with one end open, and a PVC film for sealing is arranged on its mouth. The plexiglass tube is respectively provided with an air discharge pipe connected to its inner cavity, an air intake pipe connected to its inner cavity, a temperature sensor whose sensing end extends into the inner cavity of the plexiglass tube, a pressure sensor whose sensing end extends into the inner cavity of the plexiglass tube, and a spray The two-fluid nozzle with the end extending into the inner cavity of the plexiglass tube and the high-voltage pulse igniter with the ignition end extending into the inner cavity of the plexiglass tube. The gas outlet of the inert gas bottle is connected with the inlet of the dual-fluid nozzle through a solenoid valve. The water outlet of the water tank is connected with the The liquid inlet of the dual-fluid spray head is connected, the gas outlet of the air cylinder is connected with the inlet of the intake pipe through the first check valve and the first mass flow controller connected in series, and the methane gas cylinder is connected through the second check valve and the first mass flow controller connected in series. The second mass flow controller is connected to the air inlet of the air intake pipe. The high-voltage pulse igniter is provided with a sensing end facing the ignition electrode of the high-voltage pulse igniter. A photoelectric sensor capable of sensing its ignition state is provided on the high-voltage pulse igniter. The signal output end of the photoelectric sensor It is connected with the signal input end of the camera, and the signal output ends of the camera, electromagnetic valve, temperature sensor and pressure sensor are respectively connected with the signal input end of the data acquisition instrument, and the signal output end of the data acquisition instrument is connected with the computer; An exhaust valve is provided; a flow meter is provided on the pipeline between the solenoid valve and the dual-fluid nozzle;

2. Turn on the camera, connect the pressure sensor, temperature sensor and photoelectric sensor to the power supply, connect the data acquisition instrument to the computer and open the Labview 2009 data acquisition software. Before the explosion test, debug the data acquisition software and run it once to check whether the software Normal operation to ensure the accuracy of the experimental data obtained, adjust the position of the camera so that the lens is facing the plexiglass tube, adjust the focal length of the camera lens, and take a snapshot to ensure that the captured pictures are clear for later image processing;

3. Open the exhaust valve, the first check valve and the second check valve, and pass the mixed gas of methane and air 4 times the volume of the organic glass tube cavity into the organic glass tube cavity, thereby exhausting the organic glass tube cavity The original air in the body, close the exhaust valve, the first check valve and the second check valve;

4. Carry out the gas explosion suppression test of the two-fluid inert fine water mist, open the solenoid valve to control the two-fluid nozzle to start spraying, and set the inert gas pressure and spray time;

5. Carry out the gas explosion experiment test, ignite through the voltage of the high-voltage pulse igniter, and the instantaneous photoelectric sensor captures the electric spark emitted by the ignition electrode and converts it into an electrical signal to trigger the camera to work. At the same time, the temperature sensor and pressure sensor are used to monitor the flame temperature and explosion pressure changes ;

6. Save the temperature data, pressure data and the picture of the explosion flame taken by the camera; let in 4 times the air, drain the gas in the pipeline cavity, and prepare for the next test;

7. Process the explosion flame picture taken by the high-speed camera to obtain the flame front speed;

8. Evaluate and analyze the inerting inhibition effect of the inhibitor.

The experimental device of the present invention has novel and unique structure, simple and reasonable, simple experimental method, stable and intuitive experimental process, can directly use the existing inert gas pipelines and water pipelines of coal mines and industrial enterprises, and is suitable for explosion-proof and fire-controlling of combustible gas pipelines; two-fluid The nozzle has a simple structure, takes up little space, is easy to install, and is easy to operate and control when used. The amount of atomization is realized by adjusting the pressure of the gas cylinder. The effect of suppressing explosion is good, and it is easy to use.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Provided by Fig. 1, a kind of two-fluid inerting fine water mist suppression pipeline gas explosion experimental device of the present invention comprises transparent plexiglass tube, water tank, inert gas bottle, air bottle and methane gas bottle, and plexiglass tube 10 is one end The hollow structure of the opening is provided with a PVC film 20 for sealing on its mouth, and the plexiglass tube is respectively provided with an air release pipe 5 communicating with its inner cavity and an air intake pipe 17 communicating with its inner cavity, and the sensing end extends into the organic A temperature sensor 7 in the inner cavity of the glass tube, a pressure sensor 8 whose sensing end extends into the inner cavity of the plexiglass tube, a dual-fluid nozzle 6 whose injection end extends into the inner cavity of the plexiglass tube, and a high-voltage pulse igniter 12 whose ignition end extends into the inner cavity of the plexiglass tube, The gas outlet of the inert gas bottle 4 is connected to the air inlet of the dual-fluid nozzle 6 through the solenoid valve 3, the water outlet of the water tank 1 is connected to the liquid inlet of the dual-fluid nozzle 6, and the gas outlet of the air bottle 14 is connected through the first stop in series. The reverse valve 13a and the first mass flow controller 11a are connected to the air inlet of the air inlet pipe 17, and the methane cylinder 15 is connected to the air inlet of the air inlet pipe 17 through the second check valve 13b in series and the second mass flow controller 11b. connected, the high-voltage pulse igniter 12 is provided with a sensing end facing the ignition electrode of the high-voltage pulse igniter, and a photoelectric sensor 9 capable of sensing its ignition state is provided, and the signal output terminal of the photoelectric sensor 9 is connected with the signal input terminal of the camera 16, and the camera 16. The signal output ends of the electromagnetic valve 3, the temperature sensor 7 and the pressure sensor 8 are respectively connected to the signal input ends of the data acquisition instrument 18, and the signal output ends of the data acquisition instrument 18 are connected to the computer 19.

The air discharge pipe is provided with an exhaust valve 5a;

A flow meter 2 is arranged on the pipeline between the solenoid valve 3 and the dual-fluid nozzle 6;

The plexiglass tube is a horizontal organic transparent glass tube of 120mm×120mm×840mm, with an effective volume of 12.096L, one side is closed, and a base is provided on the tube body, which can carry out inerting explosion suppression experiments in different vertical or horizontal states. In order to ensure the safety of the experimenters, the other end is sealed by a PVC film, which can be ruptured to relieve pressure when it explodes;

The camera 16 is a high-speed camera with a shooting speed of more than 2000 frames/s to capture the flame shape and the flame front position in the methane explosion process;

Described two-fluid nozzle 6 is a commercially available product (prior art), such as the BIM series siphon type micro-mist nozzle produced by Ikechi Company in Japan, whose droplet size range is 20-40 nanometers;

Described data acquisition instrument 18 is commercially available product (prior art), and the model that produces as MC company is the data acquisition card of USB-1608FSPlus type, can gather the temperature and the pressure of temperature sensor collection, pressure sensor in the methane explosion process signal, the time signal of solenoid valve opening and closing, and the image signal collected by the camera, and transmit the data to the computer through the data acquisition card;

The high-voltage pulsating igniter 12 is a commercially available product (prior art), such as the HEI19 series high-heat energy igniter produced by Xi'an Shuntai Thermal Mechanical and Electrical Equipment Co., Ltd.; the ignition voltage is 6KV.

An experimental method for suppressing pipeline gas explosion by two-fluid inerting fine water mist, comprising the following steps:

One, install test device, test device comprises transparent plexiglass tube 10, water tank 1, inert gas bottle 4, air bottle 4 and methane gas bottle 5, plexiglass tube 10 is the hollow structure of one end opening, and useful On the sealed PVC film 20, the plexiglass tube is respectively provided with an air release pipe 5 communicating with its inner chamber, an air intake pipe 17 communicating with its inner cavity, a temperature sensor 7 whose sensing end extends into the lumen of the organic glass tube, and a sensing end extending into the inner cavity of the organic glass tube. A pressure sensor 8 inserted into the lumen of the plexiglass tube, a dual-fluid nozzle 6 extending into the lumen of the plexiglass tube at the injection end, and a high-voltage pulse igniter 12 with the ignition end extending into the lumen of the plexiglass tube, and the gas outlet of the inert gas bottle 4 passes through the solenoid valve 3 It is connected with the air inlet of the dual-fluid nozzle 6, the water outlet of the water tank 1 is connected with the liquid inlet of the dual-fluid nozzle 6, and the gas outlet of the air bottle 14 is connected through the first check valve 13a and the first mass flow controller 11a connected in series. It is connected with the air inlet of the air inlet pipe 17, and the methane cylinder 15 is connected with the air inlet of the air inlet pipe 17 through the second non-return valve 13b and the second mass flow controller 11b connected in series, and the high pressure pulse igniter 12 is provided with an induction A photoelectric sensor 9 capable of sensing its ignition state is arranged on the ignition electrode facing the high-voltage pulse igniter. The signal output end of the photoelectric sensor 9 is connected with the signal input end of the camera 16. The camera 16, the solenoid valve 3, the temperature sensor 7 and the pressure The signal output end of sensor 8 links to each other with the signal input end of data acquisition instrument 18 respectively, and the signal output end of data acquisition instrument 18 links to each other with computer 19; Described deflation pipe is provided with exhaust valve 5a; Described electromagnetic valve 3 A flow meter 2 is arranged on the pipeline between the two-fluid nozzle 6;

2. Turn on the camera, connect the pressure sensor, temperature sensor and photoelectric sensor to the power supply, connect the data acquisition instrument to the computer and open the Labview 2009 data acquisition software. Before the explosion test, debug the data acquisition software and run it once to check whether the software Normal operation to ensure the accuracy of the experimental data obtained, adjust the position of the camera so that the lens is facing the plexiglass tube, adjust the focal length of the camera lens, and take a snapshot to ensure that the captured pictures are clear for later image processing;

Three, open the exhaust valve, the first check valve and the second check valve, pass into the mixed gas of methane and air of 4 times the volume of the organic glass tube cavity to the organic glass tube cavity, wherein the volumetric concentration of methane remains as 9.5%; so that the original air in the plexiglass tube cavity is exhausted, and the exhaust valve, the first check valve and the second check valve are closed; after the parameters of the mass flow controller can be set in actual operation; according to its Flow and time to control the volume of gas charged;

4. Carry out the gas explosion suppression test of the two-fluid inert fine water mist, open the solenoid valve to control the two-fluid nozzle to start spraying, and set the inert gas pressure and spray time;

5. Carry out the gas explosion experiment test, ignite through the voltage of the high-voltage pulse igniter, and the instantaneous photoelectric sensor captures the electric spark emitted by the ignition electrode and converts it into an electrical signal to trigger the camera to work. At the same time, the temperature sensor and pressure sensor are used to monitor the flame temperature and explosion pressure changes ;

6. After the detonation is successful, save the temperature data, pressure data and the picture of the explosion flame taken by the high-speed camera; enter 4 times the air, drain the gas in the pipeline cavity, and prepare for the next test;

7. Process the explosion flame picture taken by the high-speed camera to obtain the flame front speed. The specific calculation formula is:

in:

LThe total length of the pipeline, unit, mm;

z _{f, all} flame propagation direction image pixel value, pixel;

The pixel value at the flame front at time i, pixel;

t _i The time when the flame front arrives at point i, ms.

8. Evaluate and analyze the inerting suppression effect of the inhibitor, and specifically evaluate the important explosion risk evaluation parameters such as the peak value of explosion overpressure and the maximum flame velocity.

For example, the peak value of explosion overpressure and the maximum flame velocity are two important parameters to evaluate the risk of explosion.

In order to compare the explosion suppression effect of two-fluid inert water mist, all experimental results were compared with the explosion parameters of pure methane premixed gas with a volume concentration of 9.5%, and the maximum explosion overpressure of the plexiglass tube was 292.3407mbar. Among them, when the pressure of the two-fluid nozzle is 0.2Mpa, 0.3Mpa, and 0.4Mpa, the inert gas consumption is 0.45L/s, 0.6L/s, 0.77L/s, and the maximum spray rate is 0.67mL/s, 0.64mL /s, 0.53mL/s. According to the feeding time, the volume percentage of the organic glass tube occupied by the inert gas can be obtained, and the specific results are shown in Table 1-5 below.

Table 1 The volume fraction of inert gas injected into the pipeline by the dual-fluid nozzle

Table ₂ Effect of CO2 alone on the maximum overpressure of methane explosion

Table 3 Effect of individual ultrafine water mist spray time on the maximum overpressure of methane explosion (wherein the ultrafine water mist spray rate is 0.42mL/min)

Table 4 Effect of CO2-containing _two -fluid inert water mist on maximum overpressure of methane explosion

Table 5 Effect of _two -fluid inertized water mist containing CO2 on the maximum flame propagation velocity of methane explosion

From the above test results, it can be seen that the two-fluid fine water mist containing N2, CO2 and other inert gases has obvious explosion suppression effect. With the extension of the spray time, the peak velocity of the explosion flame gradually decreases. The secondary ignition failed to detonate. Compared with pure inert gas and fine water mist for explosion suppression, the two-fluid inerted fine water mist takes advantage of the explosion suppression advantages of inert gas and fine water mist, and greatly reduces the concentration of inert gas and the amount of fine water mist. It is suitable for industrial pipelines, etc. Explosion suppression in confined spaces has certain practical value.

Can clearly find out by above-mentioned situation, compared with prior art, the present invention has the following advantages:

(1) The synchronous control of ignition, pressure, temperature and flame monitoring is realized;

(2) No need to evacuate the experimental chamber, the proportion of premixed gas is quickly distributed, the method is simple, and the work efficiency is increased by more than 2 times;

(3) The dual-fluid fine water mist nozzle adopts the pneumatic siphon type, and the dual-fluid fine water mist nozzle is purchased for ordinary businesses, which is easy to buy and does not require water pump facilities;

(4) The spray can be sprayed by remotely controlling the pressure of the solenoid valve, and the particle size of the droplets can be adjusted by controlling the pressure of the gas cylinder, with high reliability and less water consumption;

(5) There is a base on the plexiglass tube, which can carry out inerting explosion suppression experiments in different vertical or horizontal states.

The applicant should point out that the above mentioned in the application is only an embodiment, and is not intended to limit the scope of protection of the application. Any technology that is essentially the same as the technical solution of the application is made by equivalent or equivalent replacement means The schemes all belong to the protection scope of the present application.

Claims (4)

1. a kind of two-fluid inerting water mists inhibit pipeline gas explosion experimental provision, including transparent organic glass pipe, water tank, Inert gas bottle, air bottle and methane gas cylinder, which is characterized in that lucite tube（10）For the hollow structure of one end open, The PVC film for sealing is provided on oral area（20）, the deflation being connected with its inner cavity is respectively arranged on lucite tube Pipe（5）, the air inlet pipe that is connected with its inner cavity（17）, induction end stretch into the temperature sensor of organic glass tube cavity（7）, induction The pressure sensor of organic glass tube cavity is stretched at end（8）, ejection end stretch into the two-fluid nozzle of organic glass tube cavity（6）With And firing tip stretches into the high-voltage pulses device of organic glass tube cavity（12）, inert gas bottle（4）Gas outlet through solenoid valve （3）With two-fluid nozzle（6）Air inlet be connected, water tank（1）Water outlet and two-fluid nozzle（6）Inlet be connected, it is empty Gas cylinder（14）The first check (non-return) valve for being concatenated of gas outlet（13a）With the first mass flow controller（11a）With air inlet pipe（17） Air inlet be connected, methane gas cylinder（15）The second check (non-return) valve being concatenated（13b）With the second mass flow controller（11b）With into Tracheae（17）Air inlet be connected, photoelectric sensor（9）Induction end face high-voltage pulses device（12）Ignitor, light Electric transducer（9）High-voltage pulses device can be incuded（12）Fired state, photoelectric sensor（9）Signal output end with take the photograph Camera（16）Signal input part be connected, video camera（16）, solenoid valve（3）, temperature sensor（7）And pressure sensor（8）'s Signal output end respectively with data collecting instrument（18）Signal input part be connected, data collecting instrument（18）Signal output end and meter Calculation machine（19）It is connected；The two-fluid nozzle（6）20-40 μm of mist droplet particle size range.

2. two-fluid inerting water mists according to claim 1 inhibit pipeline gas explosion experimental provision, which is characterized in that It is provided with air bleeding valve on the bleeder pipe（5a）.

3. two-fluid inerting water mists according to claim 1 inhibit pipeline gas explosion experimental provision, which is characterized in that The solenoid valve（3）With two-fluid nozzle（6）Between pipeline on be provided with flowmeter（2）.

4. a kind of two-fluid inerting water mists using experimental provision described in claim 1 inhibit pipeline gas explosion experiment side Method, which is characterized in that include the following steps：

One, experimental provision is installed, experimental provision includes transparent organic glass pipe（10）, water tank（1）, inert gas bottle（4）, it is empty Gas cylinder（14 ）With methane gas cylinder（15）, lucite tube（10）For the hollow structure of one end open, it is provided with and is used on oral area The PVC film of sealing（20）, the bleeder pipe being connected with its inner cavity is respectively arranged on lucite tube（5）, with its inner cavity phase The air inlet pipe of connection（17）, induction end stretch into the temperature sensor of organic glass tube cavity（7）, induction end stretch into lucite tube The pressure sensor of inner cavity（8）, ejection end stretch into the two-fluid nozzle of organic glass tube cavity（6）And firing tip stretch into it is organic The high-voltage pulses device of glass tube cavity（12）, inert gas bottle（4）Gas outlet through solenoid valve（3）With two-fluid nozzle （6）Air inlet be connected, water tank（1）Water outlet and two-fluid nozzle（6）Inlet be connected, air bottle（14）Gas outlet The first check (non-return) valve being concatenated（13a）With the first mass flow controller（11a）With air inlet pipe（17）Air inlet be connected, methane Gas cylinder（15）The second check (non-return) valve being concatenated（13b）With the second mass flow controller（11b）With air inlet pipe（17）Air inlet It is connected, photoelectric sensor（9）Induction end face high-voltage pulses device（12）Ignitor, photoelectric sensor（9）It can Incude high-voltage pulses device（12）Fired state, photoelectric sensor（9）Signal output end and video camera（16）Signal Input terminal is connected, video camera（16）, solenoid valve（3）, temperature sensor（7）And pressure sensor（8）Signal output end difference With data collecting instrument（18）Signal input part be connected, data collecting instrument（18）Signal output end and computer（19）It is connected； It is provided with air bleeding valve on the bleeder pipe（5a）；The solenoid valve（3）With two-fluid nozzle（6）Between pipeline on be arranged There is flowmeter（2）；The two-fluid nozzle（6）20-40 μm of mist droplet particle size range；

Two, video camera is opened, pressure sensor, temperature sensor and photoelectric sensor are turned on power supply, data collecting instrument connection Computer simultaneously opens 2009 data acquisition softwares of Labview and has debugged data acquisition software simultaneously before carrying out explosive test Trial operation is primary, checks software whether normal operation, to ensure that obtained experimental data is accurate, adjusts video camera camera position, Make its camera lens face lucite tube, adjust camera lens focal length, and once captured, the picture arrived to ensure shooting is clear It is clear, so that the later stage carries out picture processing；

Three, air bleeding valve, the first check (non-return) valve and the second check (non-return) valve are opened, 4 times of machine glass tube chamber is passed through to organic glass tube chamber The methane of volume and the mixed gas of air close air bleeding valve, first to drain original air in organic glass tube chamber Check (non-return) valve and the second check (non-return) valve；

Four, two-fluid inerting water mists are carried out and inhibit gas explosion test, solenoid valve control two-fluid nozzle is opened and starts to spray, Set inert gas pressure and spray time；

Five, gas explosion experiment test is carried out, is lighted a fire by high-voltage pulses device voltage, moment photoelectric sensor captures igniting Electric spark that electrode is sent out simultaneously is converted into electric signal, triggers camera operation, while supervising using temperature sensor, pressure sensor Survey flame temperature and blast pressure variation；

Six, the explosive flame picture that storage temperature data, pressure data and video camera are shot；4 times of air are passed through, duct chamber is emptied Internal gas is ready for testing next time；

Seven, the explosive flame picture of high-speed camera shooting is handled, obtains flame front velocity；

Eight, evaluation analysis is carried out to inhibitor inerting inhibition.