CN117054626A - Device and method for testing spontaneous combustion and jet fire of natural gas hydrogen-doped gas - Google Patents
Device and method for testing spontaneous combustion and jet fire of natural gas hydrogen-doped gas Download PDFInfo
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- 239000007789 gas Substances 0.000 title claims abstract description 124
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 65
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 62
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 239000003345 natural gas Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 40
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 230000005855 radiation Effects 0.000 claims description 26
- 239000011261 inert gas Substances 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000191 radiation effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/12—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of critical point; of other phase change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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Abstract
The invention relates to a natural gas hydrogen-doped gas spontaneous combustion and injection fire testing device and method, wherein the testing device comprises a gas storage tank, an ignition mechanism, a discharge mechanism and a plurality of mixed gas bottles with different mixing ratios, one end of the gas storage tank is provided with an inlet, and the top of the gas storage tank is provided with an outlet; the mixed gas bottles are respectively communicated with the gas supply pipeline, one end of the gas supply pipeline is communicated with the inlet, the discharging mechanism is arranged at the outlet, and the ignition mechanism is arranged beside the discharging mechanism. The invention has the advantages of simple structure and reasonable design, can realize simultaneous observation and data recording of spontaneous combustion phenomenon and jet fire phenomenon of natural gas hydrogen-doped gas mixture with different mixing ratios under different pressure, discharge diameters and the like, and can also carry out correlation experimental study between spontaneous combustion/jet fire phenomena.
Description
Technical Field
The invention relates to the technical field of open space mixed gas spontaneous combustion/jet fire experiments, in particular to a device and a method for testing spontaneous combustion and jet fire of natural gas hydrogen-doped gas.
Background
At present, the research on the spontaneous combustion flame characteristic of the combustible gas is mainly carried out under the condition of hydrogen which is a single gas, but the mixed gas transportation mode of natural gas and hydrogen is more common in the actual production process, and the research field for exploring and researching the spontaneous combustion phenomenon of the mixed gas is blank at present. Therefore, the research on the spontaneous combustion characteristics of the natural gas hydrogen-doped gas with different blending ratios under the factors of different relief pressures, relief apertures and the like has guiding significance on safe production, and fills the blank of the research field.
When the spontaneous combustion phenomenon is insufficient to form a stable and continuous combustion phenomenon, the study of the characteristics of the fuel gas injection flame can be studied by an electric ignition device. In the actual production process, the concentration of the leaked combustible gas can reach the explosion limit along with the influence of factors such as gas density, storage tank pressure, ambient wind speed and the like when the combustible gas leaks, and explosion accidents can be caused by the factors such as high temperature, ignition source and the like, so that the method has important practical and theoretical guidance significance on the safety production by carrying out ignition treatment on the leaked gas.
The natural gas hydrogen-doped mixed gas spontaneous combustion/injection fire experimental device for carrying out different mixing ratios in the related art mainly comprises the following two operation methods: (1) After the combustible gas reaches a certain pressure in the small-sized gas storage tank, the explosion piece is utilized to release, and the shock wave energy is gathered through the extension tube with a certain distance, so that the spontaneous combustion phenomenon is easier to occur and observe. (2) The combustible gas is discharged through the valve, continuous electric ignition is carried out outside the discharge port, and the jet fire phenomena of different pressures and discharge apertures are observed.
The experimental device and the operation method thereof can realize experimental study of spontaneous combustion/injection fire under different pressures and discharge apertures of combustible gas, but have the following defects:
1) The spontaneous combustion phenomenon of the combustible gas is mostly dependent on the arrangement of the extension tube, so that the laser energy is accumulated, but in the actual production process, the extension tube is less in existence.
2) Most of the spontaneous combustion phenomenon of the combustible gas is limited to the research of pure hydrogen, namely single-component gas under the conditions of different discharge pressures and discharge apertures, and the research of the spontaneous combustion phenomenon of natural gas hydrogen-doped mixed gas with different blending ratios is less.
3) Experimental exploration of the correlation between the phenomena of spontaneous combustion/sparging of combustible gases is relatively sparse.
Disclosure of Invention
The invention aims to solve the technical problem in the prior art by providing a device and a method for testing spontaneous combustion and injection fire of natural gas hydrogen-doped gas.
The technical scheme for solving the technical problems is as follows:
the natural gas hydrogen-doped gas spontaneous combustion and injection fire testing device comprises a gas storage tank, an ignition mechanism, a discharge mechanism and a plurality of mixed gas bottles with different mixing ratios, wherein one end of the gas storage tank is provided with an inlet, and the top of the gas storage tank is provided with an outlet; the mixed gas bottles are respectively communicated with a gas supply pipeline, one end of the gas supply pipeline is communicated with the inlet, the discharging mechanism is arranged at the outlet, and the ignition mechanism is arranged beside the discharging mechanism.
The beneficial effects of the invention are as follows: in the test process, the combustible gas in any mixed gas bottle is continuously fed into the gas storage tank, and the pressure in the gas storage tank is continuously increased until the discharge mechanism is damaged;
after the bleeder mechanism is destroyed, observing whether spontaneous combustion occurs at the outlet; when the autoignition phenomenon does not occur, ignition combustion can be performed by the ignition mechanism at this time.
The invention has simple structure and reasonable design, can realize simultaneous observation and data recording of the spontaneous combustion phenomenon and the injection fire phenomenon of the natural gas hydrogen-doped mixture with different mixing ratios under different pressure, discharge diameters and the like, and can also carry out the experimental study of the relativity between the spontaneous combustion and the injection fire phenomenon.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the ignition mechanism includes an electric ignition electrode and an electric igniter, the electric ignition electrode being mounted above the bleeder mechanism and connected to the electric igniter by a wire.
The further scheme has the beneficial effects that in the testing process, if the spontaneous combustion flame of the mixed gas is observed, no electric ignition is needed; if no spontaneous combustion flame is observed, the electric igniter should be used for controlling the electric igniter electrode to ignite, and the jet flow is ignited to form jet flame, so that the ignition is convenient.
Further, the ignition mechanism also includes a bracket on which the electric ignition electrode is mounted.
The electric ignition electrode and the electric igniter are mounted through the support, and the electric ignition electrode and the electric igniter are convenient to assemble.
Further, the electrically firing electrode may be moved up and down and positioned on the support.
The further scheme has the beneficial effects of simple structure and reasonable design, and the ignition position can be controlled by the bracket, so that the blasting parameters of the jet flame at different ignition positions can be obtained.
Further, the device also comprises a camera, wherein the camera is fixedly arranged beside the outlet, the view field of the camera is opposite to the outlet, and the camera is used for collecting spontaneous combustion or ignition images at the outlet.
The further scheme has the beneficial effects that in the test process, if the spontaneous combustion flame of the mixed gas is observed through the camera, electric ignition is not needed; if no spontaneous combustion flame is observed, the electric igniter is used for controlling the electric ignition electrode to ignite, the jet flow is ignited to form jet flame, the ignition is convenient, and the automatic observation is realized.
Further, the device also comprises a thermal radiation sensing mechanism, wherein the thermal radiation sensing mechanism is positioned beside the air storage tank.
The adoption of the further scheme has the beneficial effects that in the testing process, the heat radiation sensing mechanism is used for recording the flame radiation influence, so that automatic recording is realized.
Further, the thermal radiation sensing mechanism comprises at least one thermal radiation sensor, and each thermal radiation sensor is arranged beside the air storage tank through a support rod.
The adoption of the further scheme has the beneficial effects that in the testing process, the heat radiation sensor is used for recording the flame radiation influence, so that automatic recording is realized.
Further, the discharging mechanism comprises a base and a rupture disk, the base is arranged at the outlet, the inside of the base is hollow, and the upper end and the lower end of the base are both open; the rupture disk is fixedly arranged at the upper end opening of the base.
The beneficial effect of adopting above-mentioned further scheme is that realize the installation of rupture disk through the base, and the rupture disk can automatic fracture when the pressure in the gas holder reaches pressure threshold value, and the mixed gas in the gas holder can jet out this moment.
The device comprises a gas supply pipeline, a vacuum pump, an inert gas bottle, a pressure sensor and a four-way valve, wherein the four-way valve is provided with a first interface, a second interface, a third interface and a fourth interface; the top of the inert gas bottle is communicated with the gas supply pipeline through a pipeline.
The further scheme has the beneficial effects that in the test process, the pressure in the air storage tank is detected by the pressure sensor;
in addition, inert gas can be sent into the gas storage tank through the inert gas bottle so as to discharge air in the gas storage tank, so that the test is prevented from being influenced by the air in the gas storage tank, and the test accuracy is ensured; then, inert gas in the gas storage tank is pumped out through a vacuum pump, so that the normal running of the test is ensured.
The invention also relates to a testing method adopting the testing device for spontaneous combustion and injection fire of the natural gas hydrogen-doped gas, which is characterized by comprising the following specific steps:
the combustible gas in the mixed gas bottle enters the gas storage tank until the discharging mechanism is damaged;
and observing whether spontaneous combustion occurs at the discharge mechanism, and igniting the combustible gas jet at the discharge mechanism through the ignition mechanism if the spontaneous combustion does not occur.
The test method has the beneficial effects that the test method is simple in structure and reasonable in design, can realize simultaneous observation and data recording of spontaneous combustion phenomenon and jet fire phenomenon of the natural gas-hydrogen-mixed gas with different mixing ratios under different pressure, discharge diameters and other conditions, and can also perform experimental study on the correlation between the spontaneous combustion phenomenon and the jet fire phenomenon.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. a computer; 2. a mixed gas bottle; 3. a vacuum pump; 4. a data collector; 5. an amplifier; 6. a pressure sensor; 7. a four-way valve; 8. a base; 9. rupture disk; 10. an inert gas bottle; 11. a bracket; 12. an electric ignition electrode; 13. an electric igniter; 14. a camera; 15. a thermal radiation sensor; 16. and a gas storage tank.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
As shown in fig. 1, the embodiment provides a device for testing spontaneous combustion and injection fire of a natural gas hydrogen-doped gas, which comprises a gas storage tank 16, an ignition mechanism, a discharge mechanism and a plurality of mixed gas bottles 2 with different mixing ratios, wherein one end of the gas storage tank 16 is provided with an inlet, and the top of the gas storage tank 16 is provided with an outlet; the mixed gas bottles 2 are respectively communicated with a gas supply pipeline, one end of the gas supply pipeline is communicated with the inlet, the discharging mechanism is arranged at the outlet, and the ignition mechanism is arranged beside the discharging mechanism.
In the test process, the combustible gas in any one of the mixed gas bottles 2 is continuously fed into the gas storage tank 16, and the pressure in the gas storage tank 16 is continuously increased until the discharge mechanism is damaged;
after the bleeder mechanism is destroyed, observing whether spontaneous combustion occurs at the outlet; when the autoignition phenomenon does not occur, ignition combustion can be performed by the ignition mechanism at this time.
It should be noted that, the mixed gas bottles 2 with different mixing ratios are adopted in the prior art, the specific structure and principle thereof are not described herein, and the top of the mixed gas bottles is provided with a valve and a flowmeter respectively.
The embodiment has simple structure and reasonable design, can realize simultaneous observation and data recording of the spontaneous combustion phenomenon and the jet fire phenomenon of the natural gas hydrogen-doped gas mixture with different mixing ratios under different pressure, discharge diameters and the like, and can also carry out the experimental study of the relativity between the spontaneous combustion and the jet fire phenomenon.
Example 2
On the basis of embodiment 1, in this embodiment, the ignition mechanism includes an electric ignition electrode 12 and an electric igniter 13, and the electric ignition electrode 12 is mounted above the bleeder mechanism and is connected to the electric igniter 13 by a wire.
In the test process, if the spontaneous combustion flame of the mixed gas is observed, no electric ignition is needed; if no spontaneous combustion flame is observed, the electric igniter 13 should control the electric ignition electrode 12 to ignite, so as to ignite jet flow to form jet flame, and the ignition is convenient.
Preferably, in this embodiment, the electric igniter 13 corresponds to a control switch, and is used for controlling the electric ignition electrode 12 to perform ignition, so that the operation is simple.
Example 3
On the basis of embodiment 2, in this embodiment, the ignition mechanism further includes a bracket 11, and the electric ignition electrode 12 is mounted on the bracket 11.
The scheme has simple structure and reasonable design, and is convenient to assemble by installing the electric ignition electrode 12 and the electric igniter 13 through the bracket 11.
Example 4
On the basis of embodiment 3, in this embodiment, the electric ignition electrode 12 is movable up and down on the stand 11 and is positioned.
The scheme has simple structure and reasonable design, and can control the ignition position by utilizing the bracket 11 so as to obtain the blasting parameters of the jet flame at different ignition positions.
Based on the above scheme, the upper end of the bracket 11 is in a straight rod structure, a sliding sleeve is sleeved on the upper end of the bracket, the sliding sleeve can slide up and down, and the electric ignition electrode 12 is fixedly arranged on the sliding sleeve.
In addition, the sliding sleeve is provided with a screw hole penetrating through the inside and the outside, and a locking screw is connected at the screw hole in a threaded manner. During adjustment, the sliding sleeve is manually slid to a set position, and then the locking screw is screwed to one end of the locking screw against or loosening the bracket 11 to fix or loosen the sliding sleeve, thereby fixing or loosening the electric ignition electrode 12 to adjust the ignition position of the electric ignition electrode 12.
Example 5
On the basis of the above embodiments, the present embodiment further includes a camera 14, where the camera 14 is fixedly installed beside the outlet, its field of view is disposed opposite to the outlet, and the camera 14 is used to collect the spontaneous combustion or ignition image at the outlet.
During the test, if an auto-ignition flame of the blended gas is observed by the camera 14, no electrical ignition is required; if no spontaneous combustion flame is observed, the electric igniter 13 controls the electric ignition electrode 12 to ignite, so that jet flow is ignited to form jet flame, the ignition is convenient, and the automatic observation is realized.
Preferably, in this embodiment, the camera 14 includes a mounting frame and a camera, and the camera is fixedly mounted on the mounting frame and faces the bleeder mechanism.
It should be noted that the camera adopts the prior art, and the specific structure and principle thereof are not described herein.
Example 6
On the basis of embodiment 5, this embodiment further includes a thermal radiation sensing mechanism, which is located beside the air tank 16.
In the testing process, the heat radiation sensing mechanism is used for recording the flame radiation influence, so that automatic recording is realized.
Example 7
On the basis of embodiment 6, in this embodiment, the thermal radiation sensing mechanism includes at least one thermal radiation sensor 15, and each thermal radiation sensor 15 is mounted beside the air tank 16 through a strut.
During the test, the flame radiation effect is recorded by the thermal radiation sensor 15, so that automatic recording is realized.
Preferably, in this embodiment, the number of the thermal radiation sensors 15 is preferably plural, and the plurality of thermal radiation sensors 15 are disposed near the air storage tank 16 from far to near, respectively, for recording the flame radiation effects at different distances.
Example 8
On the basis of the above embodiments, in this embodiment, the bleeder mechanism includes a base 8 and a rupture disk 9, where the base 8 is installed at the outlet, and is hollow in the interior and has both upper and lower ends open; the rupture disk 9 is fixedly arranged at the upper end opening of the base 8.
The above scheme realizes the installation of rupture disk 9 through base 8, and when the pressure in the gas holder 16 reaches pressure threshold value, the rupture disk 9 can automatic fracture, and the mixed gas in the gas holder 16 can jet out this moment.
It should be noted that, in the prior art, the rupture disk 9 is also called as a rupture disk or an explosion-proof membrane, and the rupture disk is used to release pressure, and the container is forced to stop running after the pressure release.
Based on the above scheme, the upper end opening of the base 8 is also fixedly provided with a shooting barrel with both upper and lower ends open, and the rupture disk 9 is positioned at the lower end of the shooting barrel. The injection cylinder is reasonable in arrangement and convenient to release air.
Example 9
On the basis of embodiment 8, the embodiment further comprises a vacuum pump 3, an inert gas bottle 10, a pressure sensor 6 and a four-way valve 7, wherein the four-way valve 7 is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with the inlet, the second interface is communicated with one end of the gas supply pipeline, the third interface is communicated with the vacuum pump 3 through a pipeline, and the pressure sensor 6 is fixedly arranged around the interface; the top of the inert gas bottle 10 is communicated with the gas supply pipeline through a pipeline.
During the test, the pressure in the air storage tank 16 is detected by the pressure sensor 6;
in addition, inert gas can be sent into the gas storage tank 16 through the inert gas bottle 10 to discharge air in the gas storage tank 16, so that the test is prevented from being influenced by the air in the gas storage tank 16, and the test accuracy is ensured; then, inert gas in the gas storage tank 16 is pumped out by the vacuum pump 3, so that the normal running of the test is ensured.
Based on the above scheme, the embodiment further comprises a computer 1, a data collector 4 and an amplifier 5, wherein the computer 1, the data collector 4, the amplifier 5 and the pressure sensor 6 are respectively connected through lines.
In addition, each electronic component is respectively connected with the computer 1 in a communication way, so that automatic control is realized.
It should be noted that the computer 1, the data collector 4 and the amplifier 5 are related art, and the specific structure and principle thereof are not described herein.
Based on the above-mentioned scheme, the thermal radiation sensor 15 and the camera head send real-time images and data to the computer 1 for observing whether the spontaneous combustion phenomenon occurs.
Example 10
On the basis of the above embodiments, the present embodiment further provides a testing method using the testing device for spontaneous combustion and injection fire of natural gas hydrogen-doped gas, which comprises the following specific steps:
the combustible gas in the mixed gas bottle 2 enters the gas storage tank 16 until the discharging mechanism is damaged;
and observing whether spontaneous combustion occurs at the discharge mechanism, and igniting the combustible gas jet at the discharge mechanism through the ignition mechanism if the spontaneous combustion does not occur.
The embodiment provides a testing method, which has simple structure and reasonable design, can realize simultaneous observation and data recording of spontaneous combustion phenomenon and jet fire phenomenon of natural gas hydrogen-doped gas mixture with different mixing ratios under different pressure, discharge diameters and the like, and can also perform correlation experimental study between spontaneous combustion/jet fire phenomenon.
The working principle of the invention is as follows:
based on experimental purposes, the rupture disk 9 with different discharge apertures and bearing conditions is installed, and the vacuum pump 3 is opened to vacuumize the air storage tank 16.
Air is taken in through the air inlet valve of the proportioned mixed gas bottle 2 until the rupture disk 9 breaks, air intake is stopped, and the indication fluctuation of the pressure sensor 6 is recorded through the computer 1.
Real-time images and data of the camera 14 and the thermal radiation sensor 15 are observed by the computer 1. If no significant spontaneous combustion is observed, the electric igniter 13 controls the electric ignition electrode 12 to ignite, and the combustible gas jet is ignited.
After the experiment is completed, when the indication number of the pressure sensor 6 is reduced to be equal to the atmospheric pressure, an air inlet valve of the inert gas bottle 10 is opened, the air storage tank 16 is purged through an air inlet valve for about five minutes (at the moment, an outlet is in an open state, and a rupture disk 9 is not installed);
after the new burst disk 9 is replaced, the vacuum pump 3 is turned on to pump out the inert gas generated in the gas storage tank 16.
Repeating the above experimental steps, and performing the experiment.
Finally, through the images and parameters transmitted to the computer 1, various parameter characteristics of spontaneous combustion/injection fire of the natural gas hydrogen-doped mixed gas with different mixing ratios based on experimental purposes are analyzed to carry out theoretical guidance on safe production.
It should be noted that, all the electronic components related to the present invention adopt the prior art, and the above components are electrically connected to the controller, and the control circuit between the controller and the components is the prior art.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a natural gas hydrogen blending gas spontaneous combustion and sprays fire testing arrangement which characterized in that: the gas mixing device comprises a gas storage tank (16), an ignition mechanism, a discharge mechanism and a plurality of mixed gas bottles (2) with different mixing ratios, wherein one end of the gas storage tank (16) is provided with an inlet, and the top of the gas storage tank (16) is provided with an outlet; the mixed gas bottles (2) are respectively communicated with a gas supply pipeline, one end of the gas supply pipeline is communicated with the inlet, the discharging mechanism is arranged at the outlet, and the ignition mechanism is arranged beside the discharging mechanism.
2. The natural gas hydrogen-doped gas spontaneous combustion and injection fire testing device according to claim 1, wherein: the ignition mechanism comprises an electric ignition electrode (12) and an electric igniter (13), wherein the electric ignition electrode (12) is arranged above the bleeder mechanism and is connected with the electric igniter (13) through a circuit.
3. The natural gas hydrogen-doped gas spontaneous combustion and injection fire testing device according to claim 2, wherein: the ignition mechanism further comprises a bracket (11), and the electric ignition electrode (12) is mounted on the bracket (11).
4. A natural gas hydrogen-doped gas spontaneous combustion and fire-jet testing apparatus according to claim 3, wherein: the electric ignition electrode (12) can move up and down on the bracket (11) and is positioned.
5. The natural gas hydrogen-doped gas spontaneous combustion and fire-jet testing apparatus according to any one of claims 1 to 4, wherein: the device also comprises a camera (14), wherein the camera (14) is fixedly arranged beside the outlet, the view field of the camera is opposite to the outlet, and the camera (14) is used for acquiring spontaneous combustion or ignition images at the outlet.
6. The natural gas hydrogen-doped gas spontaneous combustion and injection fire testing device according to claim 5, wherein: the device also comprises a thermal radiation sensing mechanism, wherein the thermal radiation sensing mechanism is positioned beside the air storage tank (16).
7. The natural gas hydrogen-doped gas spontaneous combustion and injection fire testing apparatus according to claim 6, wherein: the thermal radiation sensing mechanism comprises at least one thermal radiation sensor (15), and each thermal radiation sensor (15) is arranged beside the air storage tank (16) through a supporting rod.
8. The natural gas hydrogen-doped gas spontaneous combustion and fire-jet testing apparatus according to any one of claims 1 to 4, wherein: the discharging mechanism comprises a base (8) and a rupture disk (9), the base (8) is arranged at the outlet, the inside of the base is hollow, and the upper end and the lower end of the base are both open; the rupture disk (9) is fixedly arranged at the upper end opening of the base (8).
9. The natural gas hydrogen-doped gas spontaneous combustion and fire-jet testing apparatus according to any one of claims 1 to 4, wherein: the device is characterized by further comprising a vacuum pump (3), an inert gas bottle (10), a pressure sensor (6) and a four-way valve (7), wherein the four-way valve (7) is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with the inlet, the second interface is communicated with one end of the gas supply pipeline, the third interface is communicated with the vacuum pump (3) through a pipeline, and the pressure sensor (6) is fixedly arranged around the interfaces; the top of the inert gas bottle (10) is communicated with the gas supply pipeline through a pipeline.
10. A testing method using the natural gas hydrogen-doped gas spontaneous combustion and injection fire testing device as claimed in any one of claims 1 to 9, comprising the following specific steps:
the combustible gas in the mixed gas bottle (2) enters the gas storage tank (16) until the discharging mechanism is damaged;
and observing whether spontaneous combustion occurs at the discharge mechanism, and igniting the combustible gas jet at the discharge mechanism through the ignition mechanism if the spontaneous combustion does not occur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311009995.3A CN117054626A (en) | 2023-08-11 | 2023-08-11 | Device and method for testing spontaneous combustion and jet fire of natural gas hydrogen-doped gas |
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| CN202311009995.3A CN117054626A (en) | 2023-08-11 | 2023-08-11 | Device and method for testing spontaneous combustion and jet fire of natural gas hydrogen-doped gas |
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| CN202311009995.3A Pending CN117054626A (en) | 2023-08-11 | 2023-08-11 | Device and method for testing spontaneous combustion and jet fire of natural gas hydrogen-doped gas |
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| CN (1) | CN117054626A (en) |
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