CN114811438A - Interdiction type comprehensive explosion-proof and explosion-suppression system and method - Google Patents
Interdiction type comprehensive explosion-proof and explosion-suppression system and method Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
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- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
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- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
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Abstract
The invention discloses a shielding type comprehensive explosion-proof and explosion-suppression system and method, and belongs to the technical field of combustible gas explosion safety. The invention fully utilizes the impact action of the propagating flame to release the inert gas in the inert gas column, slows down the propagation process of the propagating flame from deflagration, prevents the flame from turning to detonation from deflagration, and realizes the quick response and accurate control of the propagating flame; the high-pressure inert gas explosion suppression device is linked with the gas diversion type powder homogenizing device, and the gas diversion type powder homogenizing device is blown while inert gas is released, so that an explosion suppression agent in the gas diversion type powder homogenizing device is uniformly sprayed into the foam alloy device, and multi-stage and integrated scientific explosion suppression is realized; the gas diversion type powder homogenizing device is arranged above the supporting column, the foam alloy explosion suppression devices are arranged on the left side and the right side of the supporting column, and the size of the particle size of the explosion suppression agent powder and the porosity of the foam alloy are graded, so that comprehensive explosion suppression combining a physical explosion suppression method and a chemical explosion suppression method is realized.
Description
Technical Field
The invention relates to a shut-off type comprehensive explosion-proof and explosion-suppression system and method, which are used for comprehensive explosion-proof and explosion-suppression during the explosion of combustible gas in a gas transmission pipeline and belong to the technical field of combustible gas explosion safety.
Background
From the viewpoint of deep carbon reduction in the industrial field, hydrogen energy has received wide attention from the international society and the scientific community as one of alternative energy sources. Hydrogen is an efficient alternative energy carrier, has high heat value and does not emit greenhouse gases such as carbon oxides, and the safety of hydrogen energy is not a little great. Explosion hazards of hydrogen gas generally exist in the full life cycle of hydrogen energy utilization, and often cause huge casualties and property loss. At present, the hydrogen transportation mainly is two kinds of modes of automobile transportation and pipeline transportation, compares with automobile transportation, and pipeline transportation can greatly reduced combustible gas cost of transportation, and the extension transportation distance has good development prospect. However, in consideration of the flammability and leakage risk of hydrogen, once a hydrogen pipeline leaks, the flammable gas may self-ignite or be ignited by an external ignition source, and the flame rapidly spreads in the pipeline and is easily transformed from deflagration to detonation, which may cause destructive consequences. In order to effectively prevent explosion accidents in the pipeline transportation process, researchers have conducted extensive research on explosion-proof and explosion-suppression technologies of combustible gas in pipelines, however, all the current researches are only conducted by a single physical or chemical explosion-suppression method, the limitation is large, and safe transportation of pipelines cannot be guaranteed.
Disclosure of Invention
Aiming at the inflammability and the leakage risk of combustible gas in the transportation process of a gas pipeline and aiming at preventing the problems that the propagation flame of the combustible gas rapidly spreads and diffuses in the pipeline and the detonation is converted into the detonation, the invention discloses a blocking type comprehensive explosion-proof and explosion-suppression system and a method, which aim to solve the technical problems that: the invention provides a multistage type high-precision and quick-response interdiction type comprehensive explosion-proof and explosion-suppression system integrating explosion prevention and explosion suppression, and provides an interdiction type comprehensive explosion-proof and explosion-suppression method based on the system, which can realize comprehensive explosion prevention and explosion suppression when combustible gas in a gas transmission pipeline explodes, and ensure the safety of the gas transmission pipeline.
The purpose of the invention is realized by the following technical scheme:
the invention discloses a blocking type comprehensive explosion-proof and explosion-suppression system which comprises a gas transmission pipeline, a photosensitive sensor, a temperature sensor, a synchronous controller, a blocking type inert gas column explosion-suppression device, a high-pressure inert gas explosion-suppression device, a gas diversion type powder homogenizing device and a foam alloy explosion-suppression device. The flange plates are installed at two ends of the gas transmission pipeline, and the photosensitive sensor and the temperature sensor are sequentially installed on the inner wall of the front end of the pipeline and are connected with the synchronous controller through data transmission lines. The synchronous controller is positioned on one side of the gas transmission pipeline and is connected with the electromagnetic valve in the high-pressure inert gas explosion suppression device through a data output line. The explosion-proof device is characterized in that a blocking type inert gas column explosion-proof device is arranged in the gas transmission pipeline, the upper end of an explosion-proof steel plate of the explosion-proof device is connected with a compression spring fixed in the gas transmission pipeline, the lower end of the explosion-proof plate is connected with a cylindrical cutting blade, and the rear end of the cylindrical cutting blade is connected with the front end of the inert gas column; a high-pressure inert gas explosion suppression device is arranged above the middle part of the gas transmission pipeline, an electromagnetic valve is arranged below the high-pressure inert gas tank, and the electromagnetic valve is connected with a high-pressure inert gas spray gun below the electromagnetic valve; the pneumatic flow-guiding type powder homogenizing device is arranged at the rear side of the high-pressure inert gas explosion suppression device in a windmill shape, quantitative explosion suppressant powder is filled in the pneumatic flow-guiding type powder homogenizing device and is fixed at the top end of the supporting column, and the explosion suppressant can be uniformly thrown into the spherical foam alloy explosion suppression device through the pneumatic flow-guiding type powder homogenizing device according to the flow guiding principle, so that the contact area of the explosion suppressant and the propagation flame is increased, and the explosion suppression effect is effectively improved; the foam alloy explosion suppression device is positioned below the pneumatic flow guide type powder homogenizing device, and the foam alloy is fixed on two sides of the support column from top to bottom. By adjusting the grading relation of the foam alloy and the explosion suppression agent, the spread flame is completely quenched by the foam alloy explosion suppression device.
In order to accurately and precisely identify the live wire signal in the gas transmission pipeline, preferably, the electromagnetic valve of the high-pressure inert gas explosion suppression device is connected with the synchronous controller through a data output line. Further preferably, the response spectrum of the photosensitive sensor is 340nm-980nm, and the temperature peak of the temperature sensor is set to 100 ℃.
By adjusting the thickness of the explosion-proof plate and the elastic coefficient of the compression spring, the release efficiency of the high-pressure inert gas column is improved, the chemical explosion suppression of the propagation pair of the flame combustible gas of the inert gas is accelerated, and the explosion-proof and explosion-suppression effect and the response efficiency are improved.
Preferably, the thickness of the explosion-proof plate is adjusted according to the following formula (1),
in the formula: calculated thickness of delta wall thickness cm
b short edge length cm of explosion-proof plate
k, safety factor;
c stress coefficient; see Table 1
p design pressure MPa
δ T The yield limit of the explosion-proof plate material is MPa.
TABLE 1 stress factor C
| a/b | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | ∞ |
| C | 0.1374 | 0.1602 | 0.1812 | 0.1968 | 0.2100 | 0.2208 | 0.2208 | 0.2208 |
Wherein a is the length cm of the long side of the explosion-proof plate
The relation between the side length ratio a/b of the explosion-proof plate and the thickness delta of the explosion-proof plate is obtained by analyzing the formula (1) and the table 1, and is shown in the table 2.
TABLE 2 relationship between thickness delta and side length a/b of flameproof plate
| a/b | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | ∞ |
| δ | 0.0273a | 0.0268a | 0.0261a | 0.0251a | 0.0241a | 0.0231a | 0.0216a | 0.0216a |
As seen from table 2, the thickness δ of the flameproof plate decreases nonlinearly as the side length ratio a/b increases, and approximately, the ratio of the long side a to the short side b of the large side of the rectangular flameproof plate is about 3/2.
Preferably, the elastic coefficient of the compression spring is adjusted according to the following formula (2),
in the formula, P is pressure drop loss, Re is Reynolds number in the crack channel, l is thickness of the fire-retardant unit, d is hydraulic diameter of the crack channel, rho is fluid density, V is flow speed, and the elastic coefficient of the compression spring is determined according to pressure generated by the explosion-proof steel plate during gas detonation.
In order to accelerate the release efficiency of the gas in the high-pressure inert gas column, promote the chemical reaction between the propagation flame and the inert gas and promote the explosion-proof and explosion-suppression response efficiency and the explosion-proof and explosion-suppression effect, it is further preferable that the length of the explosion-proof plate is 2/3 of the diameter of the gas transmission pipeline, and the elastic coefficient of the compression spring is 0.026.
In order to increase the strength of the explosion-proof plate, the pressure generated when the combustible gas detonates is buffered to a certain degree, and preferably, the explosion-proof plate is made of an explosion-proof steel plate.
In order to improve the release efficiency of the inert gas in the high-pressure inert gas column, preferably, the middle part of an explosion-proof steel plate of the interceptive type inert gas column explosion-proof device is connected with 1/3 of a cylindrical cutting blade, and the rear end of the cylindrical cutting blade is connected with the front end of the inert gas column. Preferably, the inert gas column is a hollow column made of silicon dioxide material, and the gas in the inert gas column is nitrogen with the pressure of about 3 MPa.
In order to uniformly scatter the explosion suppressant in the pneumatic diversion type powder homogenizing device from the opening, the bottom of the high-pressure inert gas tank is connected with a high-pressure inert gas spray gun with a nozzle diameter of 1cm through an electromagnetic valve, and the high-pressure inert gas spray gun faces to the top end of the pneumatic diversion type powder homogenizing device.
In order to combine the explosion suppressant with the foam alloy material and realize physical and chemical explosion suppression, the pneumatic flow-guiding type powder homogenizing device is preferably in the shape of an axial-flow windmill, the blades of the pneumatic flow-guiding type powder homogenizing device can be symmetrically disassembled, an opening is formed in the front end of the pneumatic flow-guiding type powder homogenizing device, and quantitative explosion suppressant is filled in the pneumatic flow-guiding type powder homogenizing device. According to the particle size of the explosion suppressant powder, the pneumatic diversion type powder homogenizing device is further preferably fixed at the top end of the supporting column, and the diameter of an opening at the front end of the windmill is 5 mm.
In order to enhance the blowing effect of the high-pressure inert gas spray gun on the pneumatic flow guide type powder homogenizing device and facilitate the full mixing of the explosion suppressant, the capacity of the explosion suppressant powder is preferably 1/3, and the type of the explosion suppressant is more preferably ammonium dihydrogen phosphate powder.
In order to fully cover the cross section area of the gas transmission pipeline, the foam alloy explosion suppression device is preferably a spherical foam alloy explosion suppression device, and further quenching of the propagation flame is realized from the cross section angle of the pipeline.
In order to improve the quenching effect of the foam alloy device on the propagation flame, the grading relation between the foam alloy and the explosion suppressant is preferably adjusted to be 60PPI:50um, and further the propagation flame is completely quenched.
The invention also discloses a method for realizing the interruption type comprehensive explosion prevention and suppression based on the system, which is realized based on the interruption type comprehensive explosion prevention and suppression system and comprises the following concrete realization methods: when combustible gas in the gas transmission pipeline is deflagrated, the propagated flame transmits signals to the synchronous controller through the photosensitive sensor and the temperature sensor, the synchronous controller judges the set parameters of the two sensors, then transmits the signals to the electromagnetic valve below the high-pressure inert gas tank, then the inert gas in the high-pressure inert gas tank is sprayed to the pneumatic flow-guiding type powder homogenizing device from the electromagnetic valve through the high-pressure inert gas spray gun, so that the pneumatic flow-guiding type powder homogenizing device rotates under the impact action of the propagated flame, and ammonium dihydrogen phosphate powder in the device falls into the spherical foam alloy device from the opened opening, and the secondary explosion suppression effect can be realized; after combustible gas deflagrates, because explosion-proof board check keep off most impact action, and explosion-proof board is to the punching press of cylinder cutting piece, makes the cylinder cutting piece cut high-pressure inert gas post to the flame that dilutes is carried out to a large amount of inert gases that release, and pneumatic water conservancy diversion formula even powder device has been in the spherical foam alloy with phosphoric acid dihydride ammonia powder homodisperse this moment, can quench the flame after diluting completely through spherical foam alloy device.
Has the advantages that:
1. compared with the traditional explosion suppression method, the invention discloses the interruption type comprehensive explosion-proof and explosion suppression system and method, the interruption type inert gas column explosion-proof device can fully utilize the impact action of the propagating flame to release the inert gas in the inert gas column, slow down the propagation process of the propagating flame from deflagration, prevent the flame from turning to deflagration from deflagration, and realize the quick response and accurate control of the propagating flame.
2. The invention discloses a breaking-type comprehensive explosion-proof and explosion-suppression system and method, wherein a high-pressure inert gas explosion-suppression device is linked with a gas flow-guiding type powder homogenizing device, and the high-pressure inert gas explosion-suppression device blows the gas flow-guiding type powder homogenizing device while releasing inert gas, so that an explosion suppressant in the gas flow-guiding type powder homogenizing device is uniformly scattered into a foam alloy device, and thus, multi-stage and integrated scientific explosion suppression is realized.
3. The invention discloses a blocking type comprehensive explosion-proof and explosion-suppression system and a method, wherein a gas diversion type powder homogenizing device is arranged above a support column, foam alloy explosion-suppression devices are arranged on the left side and the right side of the support column, and the particle size of explosion-suppression agent powder and the porosity of foam alloy are graded, so that comprehensive explosion suppression combining a physical explosion-suppression method and a chemical explosion-suppression method is realized.
4. The invention discloses a blocking type comprehensive explosion-proof and explosion-suppression system and a method, which realize multi-stage high-precision and quick response and integrate explosion prevention and explosion suppression through the comprehensive effect of the three beneficial effects, thereby ensuring the safety of a gas transmission pipeline.
5. The invention discloses a shielding type comprehensive explosion-proof and explosion-suppression system and a method, which firstly use a first layer of explosion-proof devices, then combine every two of three parallel explosion-suppression devices with each other, and achieve comprehensive explosion-proof and explosion-suppression on the basis of simplifying the complexity. Aiming at the problem that combustible gas in a long gas transmission pipeline is likely to generate deflagration, the interdiction type comprehensive explosion-proof and explosion-suppression system integrating explosion prevention and explosion suppression is arranged in the gas transmission pipeline, so that quick response to gas deflagration is realized, and the safe transportation of the combustible gas in the gas transmission pipeline is further ensured; the gas pipeline accident suppression device is suitable for various combustible gas types, combines real-time automatic explosion suppression and unmanned operation, greatly shortens the time of gas pipeline accident response and disposal, and can effectively avoid the development and the upgrade of accidents.
Drawings
Fig. 1 is a schematic structural diagram of a comprehensive explosion-proof and explosion-suppression system of the invention.
FIG. 2 is a diagram of a shutoff type inert gas column explosion protection device.
FIG. 3 is a diagram of a high pressure inert gas explosion suppression device.
FIG. 4 is a diagram of a gas guide type powder homogenizing device and a spherical foam alloy explosion suppression device.
In the figure: the device comprises a gas pipeline 1, a photosensitive sensor 2, a temperature sensor 3, a synchronous controller 4, a shutoff type inert gas column explosion-proof device 5, a high-pressure inert gas explosion-proof device 6, a gas diversion type powder homogenizing device 7, a spherical foam alloy explosion-proof device 8, a data transmission line 9, a data output line 10, an electromagnetic valve 11, an explosion-proof steel plate 12, a compression spring 13, a cylindrical cutting piece 14, an inert gas column 15, a high-pressure inert gas tank 16, a high-pressure inert gas gun 17, ammonium dihydrogen phosphate powder 18, spherical foam alloy 19, a support column 20, a flange 21 and combustible gas 22.
Detailed Description
For a better understanding of the objects and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example 1:
as shown in fig. 1, the interruption-type comprehensive explosion-proof and explosion-suppression system disclosed in this embodiment includes a gas transmission pipeline 1, a photosensor 2, a temperature sensor 3, a synchronous controller 4, an interruption-type inert gas column explosion-proof device 5, a high-pressure inert gas explosion-suppression device 6, a gas diversion type powder homogenizing device 7, and a foam alloy explosion-suppression device 8. The two ends of the gas transmission pipeline 1 are provided with flange plates 21, the inner wall of the front end of the pipeline is sequentially provided with a photosensitive sensor 2 and a temperature sensor 3, and the photosensitive sensor and the temperature sensor are connected with a synchronous controller 4 through a data transmission line 9. The synchronous controller 4 is positioned at one side of the gas transmission pipeline 1 and is connected with an electromagnetic valve 11 in the high-pressure inert gas explosion suppression device 6 through a data output line 10. The explosion-proof device is characterized in that a blocking type inert gas column explosion-proof device 5 is installed inside the gas transmission pipeline 1, the upper end of an explosion-proof plate 12 of the explosion-proof device is connected with a compression spring 13 fixed inside the gas transmission pipeline 1, the lower end of the explosion-proof plate 12 is connected with five cylindrical cutting pieces 14, and the rear ends of the five cylindrical cutting pieces 14 are connected with the front ends of five inert gas columns 15; a high-pressure inert gas explosion suppression device 6 is arranged above the middle part of the gas transmission pipeline 1, an electromagnetic valve 11 is arranged below a high-pressure inert gas tank 16, and the electromagnetic valve 11 is connected with a low-pressure inert gas spray gun 17; the pneumatic flow-guiding type powder homogenizing device 7 is positioned at the rear side of the high-pressure inert gas explosion suppression device 6 in a windmill shape, quantitative ammonium dihydrogen phosphate powder 18 is filled in the four pneumatic flow-guiding type powder homogenizing devices 7 and is fixed at the top end of a supporting column 20, ammonium dihydrogen phosphate 18 can be uniformly thrown into a plurality of spherical foam alloy explosion suppression devices 19 through the pneumatic flow-guiding type powder homogenizing devices 7 according to the flow guiding principle, the contact area of the ammonium dihydrogen phosphate powder 18 and the propagation flame 22 is further increased, and the explosion suppression effect is effectively improved; the foam alloy explosion suppression device 8 is positioned below the pneumatic flow guide type powder homogenizing device 7, and the spherical foam alloy 19 is fixed on two sides of the support column 20 from top to bottom. By adjusting the grading relation of the spherical foam alloy 19 and the ammonium dihydrogen phosphate powder 18, the propagation flame 22 is completely quenched after passing through the foam alloy explosion suppression device 8.
The electromagnetic valve 11 of the high-pressure inert gas explosion suppression device 6 is connected with the synchronous controller 4 through a data output line 10. The response spectrum of the photosensitive sensor 2 is 340nm-980nm, and the temperature peak value of the temperature sensor 3 is set to be 100 ℃.
The thickness of the explosion-proof plate 12 is adjusted according to the following formula (1),
in the formula: calculated thickness of delta wall thickness cm
b short edge length cm of explosion-proof plate
k, safety factor;
c stress coefficient; see Table 1
p design pressure MPa
δ T The yield limit of the explosion-proof plate material is MPa.
TABLE 1 stress factor C
| a/b | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | ∞ |
| C | 0.1374 | 0.1602 | 0.1812 | 0.1968 | 0.2100 | 0.2208 | 0.2208 | 0.2208 |
Wherein a is the length of the long side of the explosion-proof plate 12, cm
By analyzing the formula (1) and the table 1, the relationship between the side length ratio a/b of the flameproof plate 12 and the thickness δ of the flameproof plate 12 can be obtained, as shown in table 2.
TABLE 2 relationship between thickness delta and side length a/b of flameproof plate
| a/b | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | ∞ |
| δ | 0.0273a | 0.0268a | 0.0261a | 0.0251a | 0.0241a | 0.0231a | 0.0216a | 0.0216a |
As can be seen from table 2, the thickness δ of the explosion-proof plate 12 decreases nonlinearly as the side length ratio a/b increases, and it is generally considered that the ratio of the long side a to the short side b of the large side of the rectangular explosion-proof plate 12 is about 3/2.
The elastic coefficient of the compression spring 13 is adjusted according to the following formula (2),
in the formula, P is pressure drop loss, Re is Reynolds number in the crack channel, l is thickness of the fire-retardant unit, d is hydraulic diameter of the crack channel, rho is fluid density, V is flow speed, and the elastic coefficient of the compression spring 13 is determined according to pressure generated by the explosion-proof steel plate during gas detonation.
The explosion-proof plate 12 is made of an explosion-proof steel plate, the length of the explosion-proof steel plate is 2/3 of the diameter of the gas transmission pipeline 1, and the elastic coefficient of the compression spring 13 is 0.026.
The middle part of an explosion-proof steel plate 12 of the cutoff type inert gas column explosion-proof device 5 is connected with 1/3 of five cylindrical cutting blades 14, the rear ends of the cylindrical cutting blades 14 are connected with the front ends of five inert gas columns 15, the five high-pressure inert gas columns 15 are hollow columns made of silicon dioxide materials, nitrogen is selected as gas in the inert gas columns 15, and the pressure is about 3 MPa.
The bottom of the high-pressure inert gas tank 16 is connected with a high-pressure inert gas spray gun 17 with a nozzle diameter of 1cm through an electromagnetic valve 11, and the high-pressure inert gas spray gun 17 faces the top end of the pneumatic flow guide type powder homogenizing device 7.
The pneumatic flow-guiding type powder homogenizing device 7 is in an axial-flow windmill shape and is fixed at the top end of the supporting column 20, fan blades of the pneumatic flow-guiding type powder homogenizing device 7 can be symmetrically detached, an opening is formed in the front end of the pneumatic flow-guiding type powder homogenizing device, quantitative explosion suppressant 18 is filled in the pneumatic flow-guiding type powder homogenizing device, the type of the explosion suppressant is ammonium dihydrogen phosphate powder, the capacity of the explosion suppressant powder 18 is 1/3, and the diameter of the opening in the front end of the windmill is 5mm according to the particle size of the explosion suppressant powder 18.
The foam alloy explosion suppression device 8 is a spherical foam alloy explosion suppression device, and the grading relation between the foam alloy 19 and the explosion suppression agent 18 is 60PPI:50 um.
The embodiment also discloses a method for realizing the interruption-type comprehensive explosion prevention and suppression based on the system, which is realized based on the interruption-type comprehensive explosion prevention and suppression system, and the specific realization method comprises the following steps: when the combustible gas 22 in the gas transmission pipeline 1 is deflagrated, the propagated flame transmits signals to the synchronous controller 4 through the photosensitive sensor 2 and the temperature sensor 3, the synchronous controller 4 judges the set parameters of the two sensors, then transmits the signals to the electromagnetic valve 11 below the high-pressure inert gas tank 16, then the inert gas in the high-pressure inert gas tank 16 is sprayed to the pneumatic flow guiding type powder homogenizing device 7 from the electromagnetic valve 11 through the high-pressure inert gas spray gun 17, so that the pneumatic flow guiding type powder homogenizing device 7 rotates under the impact action of the propagated flame, and the ammonium dihydrogen phosphate powder 18 in the device falls into the spherical foam alloy device 19 from the opened opening, thereby realizing the secondary deflagration suppression effect; after the combustible gas 22 deflagrates, because the explosion-proof plate 12 blocks most of the impact action, the explosion-proof plate 12 punches the cylindrical cutting piece 14, the cylindrical cutting piece 14 cuts the high-pressure inert gas column 15, and a large amount of released inert gas dilutes the flame, at the moment, the pneumatic flow-guiding type powder homogenizing device 7 uniformly disperses the ammonium dihydrogen phosphate powder 18 into the spherical foam alloy 19, and the diluted flame can be completely quenched through the spherical foam alloy device 19.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A explosion-proof datonation-inhibition system is synthesized to interdiction type which characterized in that: the device comprises a gas transmission pipeline, a photosensitive sensor, a temperature sensor, a synchronous controller, a cutoff type inert gas column explosion-proof device, a high-pressure inert gas explosion suppression device, a gas diversion type powder homogenizing device and a foam alloy explosion suppression device; the two ends of the gas transmission pipeline are provided with flange plates, the inner wall of the front end of the pipeline is sequentially provided with a photosensitive sensor and a temperature sensor and is connected with the synchronous controller through a data transmission line; the synchronous controller is positioned on one side of the gas transmission pipeline and is connected with the electromagnetic valve in the high-pressure inert gas explosion suppression device through a data output line; the explosion-proof device is characterized in that a blocking type inert gas column explosion-proof device is arranged in the gas transmission pipeline, the upper end of an explosion-proof steel plate of the explosion-proof device is connected with a compression spring fixed in the gas transmission pipeline, the lower end of the explosion-proof plate is connected with a cylindrical cutting blade, and the rear end of the cylindrical cutting blade is connected with the front end of the inert gas column; a high-pressure inert gas explosion suppression device is arranged above the middle part of the gas transmission pipeline, an electromagnetic valve is arranged below the high-pressure inert gas tank, and the electromagnetic valve is connected with a high-pressure inert gas spray gun below the electromagnetic valve; the pneumatic flow-guiding type powder homogenizing device is arranged at the rear side of the high-pressure inert gas explosion suppression device in a windmill shape, quantitative explosion suppressant powder is filled in the pneumatic flow-guiding type powder homogenizing device and is fixed at the top end of the supporting column, and the explosion suppressant can be uniformly thrown into the foam alloy explosion suppression device through the pneumatic flow-guiding type powder homogenizing device according to the flow guiding principle, so that the contact area of the explosion suppressant and the propagation flame is increased, and the explosion suppression effect is effectively improved; the foam alloy explosion suppression device is positioned below the pneumatic flow guide type powder homogenizing device, and the foam alloy is fixed on two sides of the support column from top to bottom; by adjusting the grading relation of the foam alloy and the explosion suppression agent, the spread flame is completely quenched by the foam alloy explosion suppression device.
2. A break-off type comprehensive explosion-proof and explosion-suppression system as claimed in claim 1, wherein: in order to accurately and precisely identify a live wire signal in the gas transmission pipeline, the electromagnetic valve of the high-pressure inert gas explosion suppression device is connected with the synchronous controller through a data output line; further preferably, the response spectrum of the photosensitive sensor is 340nm to 980 nm.
3. A break-off type comprehensive explosion-proof and explosion-suppression system as claimed in claim 1, wherein: the release efficiency of the high-pressure inert gas column is improved by adjusting the thickness of the explosion-proof plate and the elastic coefficient of the compression spring, the chemical explosion suppression of the propagation pair of the flame combustible gas of the inert gas is accelerated, and the explosion-proof and explosion-suppression effect and the response efficiency are improved;
the thickness of the explosion-proof plate is adjusted according to the following formula (1),
in the formula: calculated thickness of delta wall thickness cm
b short edge length cm of explosion-proof plate
k, safety factor;
c stress coefficient;
p design pressure MPa
δ T The yield limit of the explosion-proof plate material is Mpa.
4. A break-off type comprehensive explosion-proof and explosion-suppression system according to claim 3, wherein: the elastic coefficient of the compression spring is adjusted according to the following formula (2),
in the formula, P is pressure drop loss, Re is Reynolds number in the crack channel, l is thickness of the fire retardant unit, d is hydraulic diameter of the crack channel, rho is fluid density, V is flow speed, and the elastic coefficient of the compression spring is determined according to pressure generated by the gas in detonation on the explosion-proof steel plate.
5. A break-off type comprehensive explosion-proof and explosion-suppression system according to claim 4, wherein: in order to increase the strength of the explosion-proof plate, the pressure generated when the combustible gas detonates is buffered, and the explosion-proof plate is made of an explosion-proof steel plate.
6. A break-off type comprehensive explosion-proof and explosion-suppression system according to claim 5, wherein: in order to improve the release efficiency of inert gas in the high-pressure inert gas column, the middle part of an explosion-proof steel plate of the interceptive type inert gas column explosion-proof device is connected with 1/3 of a cylindrical cutting blade, and the rear end of the cylindrical cutting blade is connected with the front end of the inert gas column.
7. A break-off type comprehensive explosion-proof and explosion-suppression system according to claim 6, wherein: in order to combine the explosion suppressant with the foam alloy material and realize physical and chemical explosion suppression, the pneumatic flow-guiding type powder homogenizing device is in the shape of an axial-flow windmill, the fan blades of the pneumatic flow-guiding type powder homogenizing device can be symmetrically disassembled, an opening is formed in the front end of the pneumatic flow-guiding type powder homogenizing device, and quantitative explosion suppressant is filled in the pneumatic flow-guiding type powder homogenizing device.
8. A break-off type comprehensive explosion-proof and explosion-suppression system according to claim 7, wherein: in order to fully cover the cross section area of the gas transmission pipeline, the foam alloy explosion suppression device is a spherical foam alloy explosion suppression device, and further quenching of the propagation flame is realized from the cross section angle of the pipeline.
9. A break-off type comprehensive explosion-proof and explosion-suppression system according to claim 8, wherein:
in order to accelerate the release efficiency of gas in the high-pressure inert gas column, promote the chemical reaction between propagation flame and the inert gas and promote the explosion-proof and explosion-suppression response efficiency and the explosion-proof and explosion-suppression effect, the length of the explosion-proof plate is 2/3 of the diameter of the gas transmission pipeline, and the elastic coefficient of the compression spring is 0.026;
the temperature peak value of the temperature sensor is set as 100 ℃;
the inert gas column is a hollow column body made of silicon dioxide materials, nitrogen is selected as gas in the inert gas column, and the pressure is about 3 MPa;
in order to uniformly scatter the explosion suppressant in the pneumatic diversion type powder homogenizing device from the opening, the bottom of a high-pressure inert gas tank is connected with a high-pressure inert gas spray gun with the nozzle diameter of 1cm through an electromagnetic valve, and the high-pressure inert gas spray gun faces to the top end of the pneumatic diversion type powder homogenizing device;
according to the particle size of explosion suppressant powder, the pneumatic flow guide type powder homogenizing device is fixed at the top end of a support column, and the diameter of an opening at the front end of the windmill is 5 mm;
in order to strengthen the blowing effect of the high-pressure inert gas spray gun on the pneumatic flow guide type powder homogenizing device and facilitate the full mixing of the explosion suppressant, the capacity of the explosion suppressant powder is 1/3, and the type of the explosion suppressant is ammonium dihydrogen phosphate powder;
in order to improve the quenching effect of the foam alloy device on the propagation flame, the grading relation of the foam alloy and the explosion suppressant is adjusted to be 60PPI:50um, and further the propagation flame is completely quenched.
10. An interdiction type comprehensive explosion-proof and explosion-suppression method implemented based on the system is implemented based on the interdiction type comprehensive explosion-proof and explosion-suppression system as claimed in claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, and is characterized in that: when combustible gas in the gas transmission pipeline is deflagrated, the propagated flame transmits signals to the synchronous controller through the photosensitive sensor and the temperature sensor, the synchronous controller judges the set parameters of the two sensors, then transmits the signals to the electromagnetic valve below the high-pressure inert gas tank, and then nitrogen in the high-pressure inert gas tank is sprayed to the pneumatic flow-guiding type powder homogenizing device from the electromagnetic valve through the high-pressure inert gas spray gun, so that the pneumatic flow-guiding type powder homogenizing device rotates under the impact action of the propagated flame, and ammonium dihydrogen phosphate powder in the device falls into the spherical foam alloy device from the opened opening, thereby realizing secondary explosion suppression; after combustible gas deflagration, because explosion-proof board check have kept off most impact action, and explosion-proof board is to the punching press of cylinder cutting piece, makes the cylinder cutting piece cut high-pressure inert gas post to a large amount of nitrogen gas that releases dilutes flame, and pneumatic water conservancy diversion formula is even whitewashed device and has been dispersed phosphoric acid dihydride ammonia powder to spherical foam alloy in this moment, can quench the flame after diluting completely through spherical foam alloy device.
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