CN114811438B - Interruption type comprehensive explosion-proof explosion suppression system and method - Google Patents
Interruption type comprehensive explosion-proof explosion suppression system and method Download PDFInfo
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- CN114811438B CN114811438B CN202210493487.6A CN202210493487A CN114811438B CN 114811438 B CN114811438 B CN 114811438B CN 202210493487 A CN202210493487 A CN 202210493487A CN 114811438 B CN114811438 B CN 114811438B
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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
- A62C—FIRE-FIGHTING
- 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
- A62C—FIRE-FIGHTING
- 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
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
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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 shutoff type comprehensive explosion-proof explosion suppression system and method, and belongs to the technical field of combustible gas explosion safety. According to the invention, the impact of the propagating flame is fully utilized to release inert gas in the inert gas column, so that the propagation process of the propagating flame from deflagration is slowed down, the flame is prevented from being turned from deflagration to detonation, and the quick response and the accurate control of the propagating flame are realized; the high-pressure inert gas explosion suppression device is linked with the gas diversion type powder homogenizing device, inert gas is released, and the gas diversion type powder homogenizing device is sprayed, so that the explosion suppression agent in the gas diversion type powder homogenizing device is uniformly scattered into the foam alloy device, and multistage and integrated scientific explosion suppression is realized; the foam alloy explosion suppression device is 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 physical and chemical explosion suppression methods is realized.
Description
Technical Field
The invention relates to a shutoff type comprehensive explosion-proof explosion suppression system and method, which are used for comprehensive explosion-proof explosion suppression when flammable gas in a gas pipeline detonates, and belong to the technical field of flammable gas explosion safety.
Background
From the viewpoint of deep carbon reduction in the industrial field, hydrogen energy is one of alternative energy sources, and is receiving extensive attention from the international society and scientific community. Hydrogen is an efficient alternative energy carrier with high heating value and without exhausting carbon oxide isothermal chamber gases, however the safety of hydrogen energy is not so small. The explosion hazard of hydrogen is commonly existed in the full life cycle of hydrogen energy utilization, and huge casualties and property loss are often caused. At present, the hydrogen transportation is mainly carried out in two modes of automobile transportation and pipeline transportation, and compared with the automobile transportation, the pipeline transportation can greatly reduce the transportation cost of combustible gas, prolong the transportation distance and has good development prospect. However, in view of the flammability and leakage risk of hydrogen, once the hydrogen pipeline leaks, the combustible gas may self-ignite or be ignited by an external ignition source, and the flame rapidly propagates in the pipeline, so that the flame is easily changed from deflagration to detonation, and the destructive result may be caused. In order to effectively prevent explosion accidents in the pipeline transportation process, researchers have conducted extensive researches on explosion-proof and explosion-suppression technologies of combustible gas in pipelines, however, all the researches at present are only developed by a single physical or chemical explosion-suppression method, so that the limitation is large, and the safe transportation of the pipelines cannot be ensured.
Disclosure of Invention
Aiming at the problems of inflammability and leakage risk of combustible gas in the transportation process of a gas pipeline, in order to prevent the propagation flame of the combustible gas from spreading and diffusing rapidly in the pipeline and from deflagration to detonation, the invention discloses an interruption type comprehensive explosion-proof explosion suppression system and method, which aims at solving the technical problems that: the system is high in precision and quick in response, and integrates explosion prevention and explosion suppression, and the method is capable of realizing comprehensive explosion prevention and explosion suppression during the detonation of combustible gas in the gas pipeline and guaranteeing the safety of the gas pipeline.
The invention aims at realizing 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-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 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 the data transmission line. The synchronous controller is positioned at one side of the gas transmission pipeline and is connected with an electromagnetic valve in the high-pressure inert gas explosion suppression device through a data output line. The explosion-proof device of the inert gas column is characterized in that an interruption type inert gas column explosion-proof device is arranged in the gas pipeline, the upper end of an explosion-proof steel plate is connected with a compression spring fixed in the gas pipeline, the lower end of the explosion-proof plate is connected with a cylindrical cutting piece, and the rear end of the cylindrical cutting piece 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 diversion type powder homogenizing device is windmill-shaped and is positioned at the rear side of the high-pressure inert gas explosion suppression device, quantitative explosion suppression agent powder is filled in the pneumatic diversion type powder homogenizing device and is fixed at the top end of the supporting column, and according to the diversion principle, the explosion suppression agent can be uniformly thrown into the spherical foam alloy explosion suppression device through the pneumatic diversion type powder homogenizing device, so that the contact area between the explosion suppression agent and propagating flame is increased, and the explosion suppression effect is effectively improved; the foam alloy explosion suppression device is positioned below the pneumatic diversion type powder homogenizing device, and foam alloy is fixed on two sides of the support column from top to bottom. The propagating flame is completely quenched by the foam alloy explosion suppression device by adjusting the grading relation of the foam alloy and the explosion suppression agent.
In order to accurately and precisely identify the fire wire signals in the gas 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 photosensor is 340nm to 980nm, and the temperature peak of the temperature sensor is set to 100 ℃.
Through adjusting the thickness of the explosion-proof plate and the elasticity 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 inert gas flame combustible gas is accelerated, and the explosion-proof explosion suppression effect and response efficiency are improved.
Preferably, the thickness of the explosion-proof plate is adjusted according to the following formula (1),
wherein: calculation of delta wall thickness cm
b short side length cm of explosion-proof plate
k safety coefficient;
c stress coefficient; see Table 1
p design pressure MPa
δ T Yield limit of the material of the explosion-proof plate and MPa.
TABLE 1 stress coefficient 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
Analysis of formula (1) and Table 1 gave the relationship between the side length ratio a/b of the flame-proof plate and the thickness δ of the flame-proof plate, as shown in Table 2.
TABLE 2 relationship between flameproof plate thickness delta and side length a/b
| 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 explosion-proof panel decreases nonlinearly with an increase in the side length ratio a/b, approximately to a ratio of the long side a to the short side b of the large side of the rectangular explosion-proof panel of about 3/2.
Preferably, the spring constant of the compression spring is adjusted according to the following formula (2),
wherein P is pressure drop loss, re is Reynolds number in the crack channel, l is the thickness of the fire-retarding unit, d is the hydraulic diameter of the crack channel, ρ is fluid density, V is flow speed, and the elasticity coefficient of the compression spring is determined according to the pressure generated on 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 propagating flame and the inert gas, promote the explosion-proof and explosion-suppressing response efficiency and the explosion-proof and explosion-suppressing effect, further preferably, the length of the explosion-proof plate is 2/3 of the diameter of the gas transmission pipeline, and the elasticity coefficient of the compression spring is 0.026.
In order to increase the strength of the explosion-proof plate, the pressure generated during the explosion of the combustible gas is buffered to a certain extent, and preferably, the explosion-proof plate is made of an explosion-proof steel plate.
In order to improve the release efficiency of inert gas in the high-pressure inert gas column, preferably, the middle part of the explosion-proof steel plate of the explosion-proof device of the blocking type inert gas column is connected with 1/3 of the cylindrical cutting piece, and the rear end of the cylindrical cutting piece is connected with the front end of the inert gas column. Further 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 3MPa.
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 the nozzle diameter of 1cm through an electromagnetic valve, and the high-pressure inert gas spray gun faces 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 the integration of physical and chemical explosion suppression, the pneumatic diversion type powder homogenizing device is in an axial-flow windmill shape, the fan blades of the pneumatic diversion type powder homogenizing device can be symmetrically detached, an opening is formed in the front end, and quantitative explosion suppressant is arranged in the front end. According to the particle size of the explosion suppressant powder, it is further preferable that the pneumatic diversion type powder homogenizing device is fixed at the top end of the supporting column, and the diameter of the front opening of the windmill is 5mm.
In order to enhance the blowing effect of the high-pressure inert gas spray gun on the pneumatic diversion type powder homogenizing device, the explosion suppressant is convenient to fully mix, preferably, the volume of the explosion suppressant powder is 1/3, and more preferably, the type of the explosion suppressant is monoammonium phosphate powder.
In order to fully cover the cross section area of the gas pipeline, preferably, the foam alloy explosion suppression device is a spherical foam alloy explosion suppression device, so that quenching of propagating flame is realized from the cross section angle of the pipeline.
In order to promote the quenching effect of the foam alloy device on the propagation flame, preferably, the grading relationship between the foam alloy and the explosion suppressant is regulated to be 60PPI:50um, so that the complete quenching of the propagation flame is realized.
The invention also discloses a blocking type comprehensive explosion-proof and explosion-suppression method based on the system, which is realized based on the blocking type comprehensive explosion-proof and explosion-suppression system, and comprises the following specific realization methods: when flammable gas in a gas transmission pipeline knocks, the propagated flame transmits signals to a synchronous controller through a photosensitive sensor and a temperature sensor, the synchronous controller judges set parameters of the two sensors, then transmits the signals to an electromagnetic valve below a high-pressure inert gas tank, and inert gas in the high-pressure inert gas tank is sprayed to a pneumatic diversion type powder homogenizing device from the electromagnetic valve through a high-pressure inert gas spray gun, so that the pneumatic diversion type powder homogenizing device rotates under the impact of the propagated flame, and ammonia dihydrogen phosphate powder in the device falls into a spherical foam alloy device from an opened opening, thereby realizing secondary explosion suppression; after the flammable gas knocks, the explosion-proof plate blocks most of impact, and the explosion-proof plate punches the cylindrical cutting piece, so that the cylindrical cutting piece cuts the high-pressure inert gas column and a large amount of released inert gas dilutes flame, at the moment, the pneumatic diversion type powder homogenizing device uniformly disperses the monoammonium phosphate powder into the spherical foam alloy, and the diluted flame can be completely quenched through the spherical foam alloy device.
The beneficial effects are that:
1. compared with the traditional explosion suppression method, the explosion suppression system and the explosion suppression method for the obstruction type comprehensive explosion suppression system disclosed by the invention have the advantages that the arranged explosion suppression device for the obstruction type inert gas column can fully utilize the impact action of propagating flame to release inert gas in the inert gas column, slow down the propagation process of the propagating flame from deflagration, prevent the flame from being turned from deflagration to detonation, and realize the rapid response and accurate control of the propagating flame.
2. According to the shutoff type comprehensive explosion-proof explosion suppression system and method disclosed by the invention, the high-pressure inert gas explosion suppression device is linked with the gas diversion type powder homogenizing device, and the high-pressure inert gas explosion suppression device sprays the gas diversion type powder homogenizing device while releasing inert gas, so that the explosion suppression agent in the gas diversion type powder homogenizing device is uniformly scattered into the foam alloy device, and further, multistage and integrated scientific explosion suppression is realized.
3. The invention discloses a breaking type comprehensive explosion-proof and explosion-suppression system and a breaking type comprehensive explosion-proof and explosion-suppression method.
4. According to the shutoff type comprehensive explosion-proof explosion suppression system and method disclosed by the invention, through the comprehensive effects of the three beneficial effects, multistage, high-precision and quick response are realized, explosion prevention and explosion suppression are integrated, and the safety of a gas pipeline is ensured.
5. The invention discloses a shutoff type comprehensive explosion-proof explosion suppression system and method, which are characterized in that a first layer of explosion-proof devices are firstly arranged, then three parallel explosion-proof devices are combined with each other two by two, and comprehensive explosion-proof explosion suppression is achieved on the basis of simplified design. Aiming at the problem that flammable gas in a long gas transmission pipeline can deflagrate, the blocking type comprehensive explosion-proof and explosion suppression system is arranged in the gas transmission pipeline and integrates explosion prevention and explosion suppression, so that the rapid response to the gas deflagration is realized, and the safe transportation of the flammable gas in the gas transmission pipeline is further ensured; the method is not only suitable for various types of combustible gas, but also combines real-time automatic explosion suppression and unmanned operation, greatly shortens the response time of the accident of the gas pipeline, and can effectively avoid the development and upgrading of the accident.
Drawings
Fig. 1 is a schematic structural diagram of an interruption type comprehensive explosion-proof explosion suppression system of the invention.
FIG. 2 is a view of an explosion protection apparatus for a shutoff type inert gas column.
FIG. 3 is a diagram of a high pressure inert gas explosion suppression apparatus.
Fig. 4 is a diagram of a gas flow-guiding type powder homogenizing device and a spherical foam alloy explosion suppression device.
In the figure: 1-gas pipeline, 2-photosensitive sensor, 3-temperature sensor, 4-synchronous controller, 5-shutoff type inert gas column explosion-proof equipment, 6-high pressure inert gas explosion-suppression equipment, 7-gas diversion type powder homogenizing equipment, 8-spherical foam alloy explosion-suppression equipment, 9-data transmission line, 10-data output line, 11-electromagnetic valve connection, 12-explosion-proof steel plate, 13-compression spring, 14-cylinder cutting piece, 15-inert gas column, 16-high pressure inert gas tank, 17-high pressure inert gas gun, 18-monoamine phosphate powder, 19-spherical foam alloy, 20-support column, 21-flange plate and 22-combustible gas.
Detailed Description
For a better description of the objects and advantages of the present invention, the following description will be given with reference to the accompanying drawings and examples.
Example 1:
as shown in fig. 1, the embodiment discloses a comprehensive explosion-proof and explosion-suppression system with a blocking type, which comprises a gas transmission pipeline 1, a photosensitive sensor 2, a temperature sensor 3, a synchronous controller 4, an explosion-proof device 5 with a blocking type inert gas column, an explosion-suppression device 6 with a high pressure inert gas, a gas diversion type powder homogenizing device 7 and a foam alloy explosion-suppression device 8. Flange plates 21 are installed at two ends of the gas transmission pipeline 1, and a photosensitive sensor 2 and a temperature sensor 3 are sequentially installed on the inner wall of the front end of the pipeline and are connected with a synchronous controller 4 through a data transmission line 9. The synchronous controller 4 is positioned on one side of the gas 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 5 of the shutoff type inert gas column is arranged in the gas pipeline 1, the upper end of the explosion-proof plate 12 is connected with the compression spring 13 fixed in the gas pipeline 1, the lower end of the explosion-proof plate 12 is connected with the five cylindrical cutting pieces 14, and the rear ends of the five cylindrical cutting pieces 14 are connected with the front ends of the 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 high-pressure inert gas spray gun 17 below; the pneumatic diversion type powder homogenizing device 7 is windmill-shaped and positioned at the rear side of the high-pressure inert gas explosion suppression device 6, quantitative monoammonium phosphate powder 18 is arranged in the four pneumatic diversion type powder homogenizing devices 7 and fixed at the top ends of the supporting columns 20, and the monoammonium phosphate 18 can be uniformly thrown into the plurality of spherical foam alloy explosion suppression devices 19 through the pneumatic diversion type powder homogenizing device 7 according to a diversion principle, so that the contact area between the monoammonium phosphate powder 18 and the propagation flame 22 is increased, and the explosion suppression effect is effectively improved; the foam alloy explosion suppression device 8 is positioned below the pneumatic diversion 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 relationship of the spherical foam alloy 19 and the monoammonium phosphate powder 18, the propagating 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 photosensor 2 is 340nm-980nm, and the temperature peak of the temperature sensor 3 is set to 100 ℃.
The thickness of the explosion proof panel 12 is adjusted according to the following formula (1),
wherein: calculation of delta wall thickness cm
b short side length cm of explosion-proof plate
k safety coefficient;
c stress coefficient; see Table 1
p design pressure MPa
δ T Yield limit of the material of the explosion-proof plate and MPa.
TABLE 1 stress coefficient 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 |
Where a is the length of the long side of the flame-proof plate 12, cm
Analysis of the formula (1) and table 1 shows the relationship between the side length ratio a/b of the flame-proof plate 12 and the thickness δ of the flame-proof plate 12, as shown in table 2.
TABLE 2 relationship between flameproof plate thickness delta and side length a/b
| 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 flame-proof plate 12 decreases nonlinearly with an increase in the side length ratio a/b, 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 flame-proof plate 12 is about 3/2.
The elastic coefficient of the compression spring 13 is adjusted according to the following formula (2),
where P is pressure drop loss, re is reynolds number in the crack channel, l is fire-retardant unit thickness, d is hydraulic diameter of the crack channel, ρ is fluid density, V is flow velocity, and the elasticity coefficient of the compression spring 13 is determined according to pressure generated on the explosion-proof steel plate during detonation of gas.
The flameproof plate 12 is made of flameproof steel plates, the length of the flameproof steel plates is 2/3 of the diameter of the gas pipeline 1, and the elastic coefficient of the compression spring 13 is 0.026.
The middle part of the explosion-proof steel plate 12 of the blocking type inert gas column explosion-proof device 5 is connected with 1/3 of the five cylindrical cutting pieces 14, the rear ends of the cylindrical cutting pieces 14 are connected with the front ends of the five inert gas columns 15, the five high-pressure inert gas columns 15 are hollow columns made of silicon dioxide materials, and the gas in the inert gas columns 15 is nitrogen with the pressure of about 3MPa.
The bottom of the high-pressure inert gas tank 16 is connected with a high-pressure inert gas spray gun 17 with the 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 diversion type powder homogenizing device 7.
The pneumatic diversion type powder homogenizing device 7 is in an axial-flow windmill shape and is fixed at the top end of the supporting column 20, the fan blades of the pneumatic diversion type powder homogenizing device 7 can be symmetrically detached, the front end of the pneumatic diversion type powder homogenizing device is provided with an opening, a quantitative explosion suppressant 18 is arranged in the pneumatic diversion type powder homogenizing device, the type of the pneumatic diversion type powder homogenizing device is ammonium dihydrogen phosphate powder, the capacity of the explosion suppressant powder 18 is 1/3, and the diameter of the opening at 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 relationship between the foam alloy 19 and the explosion suppression agent 18 is 60PPI:50um.
The embodiment also discloses a blocking type comprehensive explosion suppression method based on the system, which is realized based on the blocking type comprehensive explosion suppression system, and comprises the following specific realization methods: when flammable gas 22 in the gas pipeline 1 knocks, 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, and inert gas in the high-pressure inert gas tank 16 is sprayed from the electromagnetic valve 11 to the pneumatic diversion type powder homogenizing device 7 through the high-pressure inert gas spray gun 17, so that the pneumatic diversion type powder homogenizing device 7 rotates under the impact of the propagated flame, and the ammonia dihydrogen phosphate powder 18 in the device falls into the spherical foam alloy device 19 from the opened opening, thereby realizing secondary explosion suppression; after the combustible gas 22 detonates, the explosion-proof plate 12 blocks most of the impact effect, and the explosion-proof plate 12 punches the cylindrical cutting piece 14, so that the cylindrical cutting piece 14 cuts the high-pressure inert gas column 15, and a large amount of inert gas released dilutes the flame, at the moment, the pneumatic diversion type homogenizing device 7 uniformly disperses the monoammonium phosphate powder 18 into the spherical foam alloy 19, and the diluted flame can be completely quenched through the spherical foam alloy device 19.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. An explosion-proof explosion suppression system is synthesized to shutoff formula, its characterized in that: the device comprises a gas pipeline, a photosensitive sensor, a temperature sensor, a synchronous controller, an interruption type inert gas column explosion-proof device, a high-pressure inert gas explosion-proof device, a gas diversion type powder homogenizing device and a foam alloy explosion-proof device; flanges are arranged at two ends of the gas transmission pipeline, and a photosensitive sensor and a temperature sensor are sequentially arranged on the inner wall of the front end of the pipeline and are connected with a synchronous controller through a data transmission line; the synchronous controller is positioned at one side of the gas transmission pipeline and is connected with an electromagnetic valve in the high-pressure inert gas explosion suppression device through a data output line; the explosion-proof device of the inert gas column is characterized in that an interruption type inert gas column explosion-proof device is arranged in the gas pipeline, the upper end of an explosion-proof steel plate is connected with a compression spring fixed in the gas pipeline, the lower end of the explosion-proof plate is connected with a cylindrical cutting piece, and the rear end of the cylindrical cutting piece 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 diversion type powder homogenizing device is windmill-shaped and is positioned at the rear side of the high-pressure inert gas explosion suppression device, quantitative explosion suppression agent powder is filled in the pneumatic diversion type powder homogenizing device and is fixed at the top end of the supporting column, and the explosion suppression agent can be uniformly thrown into the foam alloy explosion suppression device through the pneumatic diversion type powder homogenizing device according to the diversion principle, so that the contact area between the explosion suppression agent and propagating flame is increased, and the explosion suppression effect is effectively improved; the foam alloy explosion suppression device is positioned below the pneumatic diversion type powder homogenizing device, and foam alloy is fixed on two sides of the support column from top to bottom; the propagating flame is completely quenched by the foam alloy explosion suppression device by adjusting the grading relation of the foam alloy and the explosion suppression agent.
2. The shutoff-type integrated explosion suppression system of claim 1, wherein: in order to accurately and precisely identify the live wire signal in the gas 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 photosensor is 340nm to 980nm.
3. The shutoff-type integrated explosion suppression system of 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 elasticity coefficient of the compression spring, the chemical explosion suppression of the propagation pair of the inert gas flame combustible gas is accelerated, and the explosion-proof explosion suppression effect and response efficiency are improved;
the thickness of the explosion-proof plate is regulated according to the following formula (1),
wherein: calculation of delta wall thickness cm
b short side length cm of explosion-proof plate
k safety coefficient;
c stress coefficient;
p design pressure MPa
δ T Yield limit of the material of the explosion-proof plate and Mpa.
4. A comprehensive explosion suppression system according to claim 3, wherein: the spring constant of the compression spring is adjusted according to the following formula (2),
wherein P is pressure drop loss, re is Reynolds number in the crack channel, l is the thickness of the fire-retarding unit, d is the hydraulic diameter of the crack channel, ρ is fluid density, V is flow speed, and the elasticity coefficient of the compression spring is determined according to the pressure generated on the explosion-proof steel plate during gas detonation.
5. The interrupter 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 explosion-proof plate is used for buffering the pressure generated during the explosion of the combustible gas.
6. The interrupter 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 the explosion-proof steel plate of the explosion-proof device of the blocking type inert gas column is connected with 1/3 of the cylindrical cutting piece, and the rear end of the cylindrical cutting piece is connected with the front end of the inert gas column.
7. The interrupter 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 the physical and chemical explosion suppression, the pneumatic diversion type powder homogenizing device is in an axial-flow windmill shape, the fan blades of the pneumatic diversion type powder homogenizing device can be symmetrically disassembled, the front end of the device is provided with an opening, and quantitative explosion suppressant is filled in the device.
8. The interrupter 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 pipeline, the foam alloy explosion suppression device is a spherical foam alloy explosion suppression device, so that quenching of propagating flame is realized from the cross section angle of the pipeline.
9. The interrupter type comprehensive explosion-proof and explosion suppression system according to claim 8, wherein:
in order to accelerate the release efficiency of the gas in the high-pressure inert gas column, promote the chemical reaction between propagating flame and inert gas, promote the explosion-proof and explosion-suppression response efficiency and explosion-proof and explosion-suppression effect, the length of the explosion-suppression 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 to be 100 ℃;
the inert gas column is a hollow column body made of silicon dioxide material, and the gas in the inert gas column is nitrogen with the pressure of about 3MPa;
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 the nozzle diameter of 1cm through an electromagnetic valve, and the high-pressure inert gas spray gun faces the top end of the pneumatic diversion type powder homogenizing device;
according to the particle size of the explosion suppressant powder, the pneumatic diversion type powder homogenizing device is fixed at the top end of a supporting column, and the diameter of an opening at the front end of the windmill is 5mm;
in order to strengthen the blowing effect of the high-pressure inert gas spray gun on the pneumatic diversion type powder homogenizing device, the explosion suppressant is convenient to fully mix, the volume of the explosion suppressant powder is 1/3, and the explosion suppressant is of the type of monoammonium phosphate powder;
in order to promote the quenching effect of the foam alloy device on the propagation flame, the grading relationship between the foam alloy and the explosion suppressant is regulated to be 60PPI:50um, so that the complete quenching of the propagation flame is realized.
10. An interruption type comprehensive explosion suppression method based on the system is realized based on the interruption type comprehensive explosion suppression system as claimed in claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, and is characterized in that: when flammable gas in a gas transmission pipeline knocks, the propagated flame transmits signals to a synchronous controller through a photosensitive sensor and a temperature sensor, the synchronous controller judges set parameters of the two sensors, then transmits the signals to an electromagnetic valve below a high-pressure inert gas tank, nitrogen in the high-pressure inert gas tank is sprayed to a pneumatic diversion type powder homogenizing device from the electromagnetic valve through a high-pressure inert gas spray gun, the pneumatic diversion type powder homogenizing device rotates under the impact of the propagated flame, and ammonia dihydrogen phosphate powder in the device falls into a spherical foam alloy device from an opened opening, so that the secondary explosion suppression effect can be realized; after the flammable gas knocks, the explosion-proof plate blocks most of impact action, and the explosion-proof plate punches the cylindrical cutting piece, so that the cylindrical cutting piece cuts the high-pressure inert gas column and a large amount of released nitrogen dilutes flame, at the moment, the pneumatic diversion type powder homogenizing device uniformly disperses the monoammonium phosphate powder into the spherical foam alloy, and the diluted flame can be completely quenched through the spherical foam alloy device.
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