CN116559261A - Inerting protection device and method for preventing leakage hydrogen explosion - Google Patents
Inerting protection device and method for preventing leakage hydrogen explosion Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 66
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 66
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 238000004880 explosion Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 238000005507 spraying Methods 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 20
- 229910021126 PdPt Inorganic materials 0.000 claims abstract description 17
- 229910006404 SnO 2 Inorganic materials 0.000 claims abstract description 15
- 239000011261 inert gas Substances 0.000 claims abstract description 15
- 239000002105 nanoparticle Substances 0.000 claims abstract description 15
- 239000000243 solution Substances 0.000 claims description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 8
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 101150003085 Pdcl gene Proteins 0.000 claims description 5
- 229960005070 ascorbic acid Drugs 0.000 claims description 5
- 235000010323 ascorbic acid Nutrition 0.000 claims description 5
- 239000011668 ascorbic acid Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000011540 sensing material Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
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- 239000013078 crystal Substances 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003595 mist Substances 0.000 abstract description 3
- 238000000889 atomisation Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 14
- 239000001301 oxygen Substances 0.000 description 14
- 229910052760 oxygen Inorganic materials 0.000 description 14
- 238000001514 detection method Methods 0.000 description 6
- 239000011258 core-shell material Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 210000001787 dendrite Anatomy 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
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- 238000012545 processing Methods 0.000 description 3
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- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
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- WVSNNWIIMPNRDB-UHFFFAOYSA-N 1,1,1,3,3,4,4,5,5,6,6,6-dodecafluorohexan-2-one Chemical compound FC(F)(F)C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F WVSNNWIIMPNRDB-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 229960001927 cetylpyridinium chloride Drugs 0.000 description 1
- YMKDRGPMQRFJGP-UHFFFAOYSA-M cetylpyridinium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+]1=CC=CC=C1 YMKDRGPMQRFJGP-UHFFFAOYSA-M 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4075—Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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Abstract
An inerting protection device and method for preventing leakage hydrogen explosion belong to the technical field of hydrogen safety production. The inerting protection device for preventing the leakage hydrogen explosion comprises a sensor, an alarm, an inerting spraying device and a controller; the inerting spraying device comprises an inerting tank body, a pneumatic valve and a pneumatic valve driving gas cylinder, wherein the upper port of the pneumatic valve is connected with the bottom outlet of the inerting tank body, the lower port of the pneumatic valve is connected with an inerting agent spraying bent pipe, and the spraying bent pipe is connected with an inerting agent atomizing nozzle. The device utilizes branch crystal nucleus shell type PdPt bimetallic nano particles to modify SnO 2 The supersensitive property of the material to hydrogen can realize the monitoring and early warning of leaked hydrogen at room temperature within 1 second; the inerting agent spraying device realizes the spraying of large-scale continuous inerting agent cloud mist by utilizing an atomization nozzle through the double inerting action of inert gas and inerting materials, and can realize the inerting treatment of leaked hydrogen within 10 seconds.
Description
Technical Field
An inerting protection device and method for preventing leakage hydrogen explosion belong to the technical field of hydrogen safety production.
Background
Hydrogen is widely used as an energy carrier or raw material in industrial production, and hydrogen is produced on an industrial large scale throughout the world each year. The chemical production industry is one of the most important fields of application for hydrogen as a reaction raw material. In the chemical industry, hydrogen is mainly used for the production of synthetic ammonia, methanol and synthetic fuels, the hydrogenation of fats and the hydrocracking of petroleum. The primary source of hydrogen is released through the gasification process of coal. Whether the hydrogen is produced or used as a feedstock for the production process, accidental leakage of hydrogen can result in the formation of a flammable gas mixture that can cause a fire or even an explosion when an ignition source is encountered. Currently, the gas explosion-proof standard (EN 14994:2007;NFPA 68-2007) is mainly used for safety explosion suppression and explosion prevention of chemical plants and processing plants. However, since the laminar combustion speed of hydrogen is much higher than that of hydrocarbon, when explosion prevention and suppression are performed in the application process of hydrogen by using the standard, effective suppression of hydrogen explosion is difficult to achieve because the exhaust area is very large.
The hydrogen safety is very important for the modern industry, but the research on the inerting and the inhibition of the hydrogen explosion at home and abroad is less at present, the explosion range of the hydrogen is wide, the atomic radius is small, and the current situation that the existing inerting equipment is insensitive to the monitoring of leaked hydrogen and has low inerting efficiency exists. In addition, research and development of safety inerting protection technology and equipment for leaked hydrogen are not reported in the literature.
Disclosure of Invention
The invention aims to solve the problem of insensitivity to leakage hydrogen monitoring, and provides a device capable of monitoring and early warning the initial stage of hydrogen leakage at room temperature so as to realize the purpose of monitoring and early warning the leakage hydrogen with low concentration.
Another object of the present invention is to provide a high-efficiency hydrogen leakage inerting device, so that the leaked hydrogen place can meet the safety protection requirement, and the risk of explosion of the leaked hydrogen is reduced.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an inerting protection device for preventing leakage hydrogen explosion comprises a sensor, an alarm, an inerting spraying device and a controller; the inerting spraying device comprises an inerting tank body, a pneumatic valve and a pneumatic valve driving gas cylinder, wherein the upper port of the pneumatic valve is connected with the bottom outlet of the inerting tank body, the lower port of the pneumatic valve is connected with an inerting agent spraying elbow, the spraying elbow is connected with an inerting agent atomizing nozzle, and the pneumatic valve driving gas cylinder is connected with the pressure input port of the pneumatic valve through a conduit; the sensor, the alarm and the pneumatic valve are electrically connected with the controller 8.
The sensor adopts PdPt bimetallic nano particle modified SnO 2 The material is used as a sensing material.
Furthermore, the sensor adopts branch crystal nucleus shell type PdPt bimetallic nano particles to modify SnO 2 The atomic ratio of the dendrite core-shell type PdPt bimetallic nanoparticle load of the material is 1 at%. The dendritic crystal core-shell type PdPt bimetallic nano-particle modified SnO adopted by the invention 2 The material can realize linear detection of low-concentration hydrogen of 10-1000 ppm at room temperature, the measurement resolution is 10 ppm, the detection lower limit is 10 ppm, and the detection time is 1 s. In particular, compared with other PdPt/SnO2, the dendrite core-shell type PdPt bimetallic nanoparticle modified SnO2 material with 1-at% of the invention contains abundant oxygen vacancies and chemisorbed oxygen (content is 61.03%), and both the oxygen vacancies and the chemisorbed oxygen are beneficial to the gas-sensitive reaction according to an oxygen adsorption model.
Further, the PdPt bimetallic nanoparticle modified SnO 2 The material is prepared by the following method:
1) SnO is prepared 2 Dispersing in deionized water, and performing ultrasonic treatment for 15min;
2) Sequentially adding CPC solution and H 2 PdCl 4 Solution, naCl solution and H 2 PtCl 4 A solution;
3) Adding an ascorbic acid solution into the mixed solution in the step 2 under the water bath at 90 ℃ and reacting for 6 hours under the condition of 90 ℃;
4) Centrifugal washing and drying the product at 60 ℃;
SnO 2 、CPC、H 2 PdCl 4 、NaCl、H 2 PtCl 4 the molar ratio of the ascorbic acid is 66-67:1:4:0.5:1.
The maximum bearing pressure of the inerting tank body is 5MPa, and inert gas and/or inerting material with certain pressure is filled into the inerting tank body. Preferably, 4MPa of inert gas is flushed.
The inerting material is an inert substance that can be stored in a liquid state and quickly gasifies after spraying. Preferably, the inerting material is perfluoro-hexanone.
The inert gas injected into the inerting tank body is one or more of inert gases such as carbon dioxide, nitrogen, argon and helium. Carbon dioxide is preferred.
The pneumatic valve drives the inside of the gas cylinder to be filled with inert gas with certain pressure. Preferably 1MPa inert gas. The inert gas filled into the gas cylinder is one of inert gases such as nitrogen, argon, helium and the like.
The number of the inerting tank bodies and the weight of the inerting agent of each tank body can be adjusted according to the space size of an actual scene.
The inerting agent spraying bent pipe adopts a bendable structure, and can be bent for a certain angle according to actual needs.
The inerting agent spraying nozzle adopts an atomization nozzle. Each inerting agent atomizer 7 is connected with at least three atomizing nozzles.
According to the protection method of the inerting protection device for preventing the explosion of leaked hydrogen, after the sensor detects the leaked hydrogen, the conductivity of the sensor is increased, and a central processing unit on an alarm converts the change of the conductivity of a probe into H 2 Signal output corresponding to the concentration when H 2 When the concentration reaches a set threshold value, triggering an audible and visual alarm on the alarm to carry out audible and visual alarm;
after the controller receives the signal of the sensor, the output signal triggers the pneumatic valve to act, the pneumatic valve drives the gas cylinder to open under the action of the gas cylinder, and the inerting agent in the inerting tank body sprays the inerting agent to a specific angle through the inerting agent spraying elbow pipe and the inerting agent atomizing nozzle to form inerting cloud mist.
The invention has the beneficial effects that: an inerting protection device for preventing leakage hydrogen explosion comprises a sensor, an alarm, an inerting spraying device and a controller; the inerting spraying device comprises an inerting tank body, a pneumatic valve and a pneumatic valve driving gas cylinder, wherein the upper port of the pneumatic valve is connected with the bottom outlet of the inerting tank body, and the lower port of the pneumatic valve is connected with the bottom outlet of the inerting tank bodyThe air cylinder is connected with a pressure input port of the air cylinder through a conduit. The device utilizes branch crystal nucleus shell type PdPt bimetallic nano particles to modify SnO 2 The supersensitive property of the material to hydrogen can realize the monitoring and early warning of leaked hydrogen at room temperature within 1 second; the inerting agent spraying device utilizes high-pressure inert gas in the tank body, realizes the spraying of large-scale continuous inerting agent cloud mist through the atomizing nozzle, and can realize inerting treatment of leaked hydrogen in 10 seconds.
Drawings
Fig. 1 is a schematic structural view of an inerting protection apparatus for preventing explosion of leaked hydrogen gas.
Fig. 2 is a schematic diagram of the operation of an inerting protection device for preventing explosion of leaked hydrogen.
FIG. 3 branch nucleus shell type PdPt bimetallic nanoparticle modified SnO 2 O1 s spectrum of (c).
In the figure, 1, a sensor; 2. an alarm; 3. inerting the tank; 4. a pneumatic valve; 5. the valve drives the gas cylinder; 6. an inerting agent spraying elbow; 7. an inerting agent atomizing nozzle; 8. and a controller.
Description of the embodiments
Specific embodiments of the sensor preparation and equipment of the present invention are described in further detail below. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Branched nucleus shell type PdPt bimetallic nano particle modified SnO 2 Preparation of materials:
step 1: 100mg SnO is first added 2 Dispersing in 10mL deionized water, and performing ultrasonic treatment for 15min;
step 2: to the above solution, 5mL (20 mM) of cetylpyridinium chloride solution and 1 mL (10 mM) H were added in this order 2 PdCl 4 Solution, 0.5mL (80 mM) NaCl solution and 0.5mL (10 mM) H 2 PtCl 4 A solution;
step 3: transferring the mixture into a water bath kettle with the temperature of 90 ℃, adding 0.5mL (20 mM) of ascorbic acid solution under the condition of magnetic stirring, and reacting for 6 hours under the condition of 90 ℃;
step 4: after the reaction was completed, the mixture was centrifugally washed, and the collected product was dried in an oven at 60 ℃.
Taking 5mg of prepared SnO 2 The powder sample of the material is stuck on double-sided carbon conductive adhesive, and oxygen element analysis is carried out on the sample by an X-ray diffraction photoelectron spectrometer, the analysis result is shown in figure 3, and as can be seen from figure 3, the dendrite core-shell type PdPt bimetallic nano particle modified SnO 2 The material has rich oxygen vacancies and chemisorbed oxygen (the total content is 61.03%), and both the oxygen vacancies and the chemisorbed oxygen are beneficial to the gas-sensitive reaction according to an oxygen adsorption model. Where OL is lattice oxygen, OV is oxygen vacancies, and OC is chemisorbed oxygen.
Through testing, the prepared dendrite core-shell type PdPt bimetallic nano-particle modified SnO 2 The material realizes linear detection of low-concentration hydrogen of 10-1000 ppm at room temperature, the measurement resolution is 10 ppm, the detection lower limit is 10 ppm, and the detection time is 1 s.
Then modifying SnO by the prepared branched crystal nucleus shell type PdPt bimetallic nano particles 2 The material is adhered to the surface of the ceramic substrate by surface spraying and is subjected to aging treatment; which is then encapsulated in a polytetrafluoroethylene shell with a plurality of holes. And is connected with the central processing unit to form the hydrogen sensor with high sensitivity performance for hydrogen, and the hydrogen sensor is assembled by adopting the prior art. The hydrogen sensor is then assembled into an inerting shield to form an inerting shield for preventing explosion of leaked hydrogen.
Fig. 1 shows a schematic diagram of an inerting protection device for preventing a hydrogen explosion in leakage, comprising a sensor 1, an alarm 2, four inerting spraying devices and a controller 8; the inerting spraying device comprises an inerting tank body 3, a pneumatic valve 4 and a pneumatic valve driving gas cylinder 5, wherein the inlet end of the pneumatic valve 4 is connected with the bottom outlet of the inerting tank body 3, the outlet end of the pneumatic valve is connected with inerting agent atomizing spray heads 7 through an inerting agent spraying elbow 6, each inerting agent atomizing spray head 7 is connected with three atomizing nozzles, and the pneumatic valve driving gas cylinder 5 is connected with a pressure input port of the pneumatic valve 4 through a conduit; the sensor adopts supported branch crystal nucleus shell type PdPt bimetallic nano particleParticle modified SnO 2 The ceramic substrate structure of the sensing material, the shell is encapsulated by polytetrafluoroethylene.
The sensor 1, the alarm 2 and the pneumatic valve 4 are electrically connected with the controller 8. The maximum bearing pressure of the inerting tank body 3 is 5MPa, 4MPa of carbon dioxide is flushed into the inerting tank body 3, and 1MPa of nitrogen is flushed into the gas cylinder 5 by the pneumatic valve. The workflow of the device is shown in figure 2.
Example 1
The sensor 1 is fixed on a pillar of a frame with the size of 3m x 3m, the frame is sealed by a plastic film, and a hydrogen-air mixed gas with specific hydrogen concentration is configured by using a gas circulating pump. A fixed focus high energy ignition gun with an ignition energy of 40J was arranged at the bottom of the frame. The sony DV was used to capture the hydrogen explosion inerting process, the pressure sensor model was 106B, and the pressure sensor locations were placed at distances of 4m,8m,12m and 16m, respectively, from the ignition center level. The explosion suppression tank bodies are 4 in number and are arranged at four corners of the frame. 4MPa of carbon dioxide is flushed into each tank body. The angle at which the inerting agent spraying elbow 6 is bent is 45 degrees. Three atomizing nozzles are mounted on each inerting agent atomizer 7 and face the center of ignition.
When hydrogen starts to enter the sealing film, the hydrogen concentration sensor detects the existence of the hydrogen within 1 second, and the alarm gives an early warning. And stopping introducing the hydrogen when the volume concentration of the introduced hydrogen reaches 29.5%. The tank body is controlled by a controller to spray an inerting material to inerte the hydrogen-air with the hydrogen concentration of 29.5%, 4 inerting tank bodies 3 realize inerting of the premixed gas within 10 seconds, and then the premixed gas is not exploded under continuous ignition for 3 minutes after ignition every 20 seconds, and the external field pressure is zero.
Example 2
The sensor 1 was fixed on a post of a frame with dimensions 2.2 x 1.8m, the frame was sealed around with a plastic film, the liquid hydrogen leakage flow rate was 0.2 cubic per minute, and the leakage time was 30s. A fixed focus high energy ignition gun with an ignition energy of 40J was arranged in the center of the frame. The sony DV was used to capture the liquid hydrogen explosion inerting process, the pressure sensor model was 106B, and the pressure sensor locations were placed at distances of 4m,8m,12m and 16m from the horizontal distance from the ignition center. Four inerting tanks 3 are arranged at the four corners of the frame. Each tank is filled with a certain amount of inerting agent, and 4MPa of carbon dioxide is injected. The angle at which the inerting agent spraying elbow 6 is bent is 45 degrees. Three atomizing nozzles are mounted on each inerting agent atomizer 7 and face the center of ignition.
When the liquid hydrogen starts to leak, the sensor 1 detects the existence of the leaked liquid hydrogen within 1 second, and the alarm gives an early warning. After 30 seconds of liquid hydrogen leakage, the four inerting tanks 3 begin to spray inert gas, and after 10 seconds of spraying, the liquid hydrogen is not exploded under continuous ignition for 3 minutes by an ignition gun, and the external field pressure is zero. It can be seen that after 30 seconds of liquid hydrogen leakage, four inerting tanks achieved inerting of the leaked liquid hydrogen within 10 seconds.
The above embodiments are only for illustrating the present invention, not for limiting the present invention, and various changes and modifications may be made by one of ordinary skill in the relevant art without departing from the spirit and scope of the present invention, and therefore, all equivalent technical solutions are also within the scope of the present invention, and the scope of the present invention is defined by the claims.
Claims (9)
1. An inerting protection device for preventing explosion of leaked hydrogen, characterized in that it comprises a sensor (1), an alarm (2), an inerting spraying device and a controller (8); the inerting spraying device comprises an inerting tank body (3), a pneumatic valve (4) and a pneumatic valve driving gas cylinder (5), wherein the inlet end of the pneumatic valve (4) is connected with the bottom outlet of the inerting tank body (3), the outlet end of the pneumatic valve is connected with an inerting agent atomizing nozzle (7) through an inerting agent spraying elbow pipe (6), and the pneumatic valve driving gas cylinder (5) is connected with the pressure input port of the pneumatic valve (4) through a conduit;
the controller (8) is electrically connected with the sensor (1), the alarm (2) and the pneumatic valve (4).
2. The device according to claim 1, characterized in that the sensor (1) employs PdPt bimetallic nanoparticle modified SnO 2 MaterialAs a sensing material.
3. The device of claim 2, wherein the PdPt bimetallic nanoparticle modified SnO 2 The material is prepared by the following method:
1) SnO is prepared 2 Dispersing in deionized water, and performing ultrasonic treatment for 15min;
2) Sequentially adding CPC solution and H 2 PdCl 4 Solution, naCl solution and H 2 PtCl 4 A solution;
3) Adding an ascorbic acid solution into the mixed solution in the step 2 under the water bath at 90 ℃ and reacting for 6 hours under the condition of 90 ℃;
4) Centrifugal washing and drying the product at 60 ℃;
SnO 2 、CPC、H 2 PdCl 4 、NaCl、H 2 PtCl 4 the molar ratio of the ascorbic acid is 66-67:1:4:0.5:1.
4. The device according to claim 1, characterized in that the maximum bearing pressure of the inerting tank (3) is 5MPa, the inerting material and/or inert gas is flushed into the inerting tank (3), and the pneumatic valve drives the gas cylinder (5) to flush inert gas into the inerting tank.
5. The apparatus of claim 4, wherein the inerting material is an inert substance capable of liquid storage and rapid vaporization after spraying.
6. The device according to claim 4, wherein the inert gas flushed in the inerting tank body (3) is one or more selected from carbon dioxide, nitrogen, argon and helium, and the inert gas flushed in the pneumatic valve driving gas cylinder (5) is one of nitrogen, argon and helium.
7. The device according to claim 1, characterized in that the inerting agent spraying elbow (6) adopts a bendable structure.
8. The device according to claim 1, characterized in that the inerting agent atomizer heads (7) are atomizer heads, each inerting agent atomizer head (7) being connected to at least three atomizer nozzles.
9. Protection method of an inerting protection device for preventing the explosion of leaked hydrogen according to claim 1, characterized in that after the sensor (1) detects the leaked hydrogen, a signal is transmitted to the alarm (2), when H 2 When the concentration reaches a set threshold value, triggering an audible and visual alarm on the alarm (2) to carry out audible and visual alarm;
after the controller (8) receives the signal of the sensor (1), the pneumatic valve (4) is triggered to act by the output signal, the pneumatic valve (4) is opened under the action of the driving gas cylinder (5), and the inerting agent in the inerting tank body (3) is sprayed to a specific angle through the inerting agent spraying elbow pipe (6) and the inerting agent atomizing nozzle (7) to form inerting cloud.
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