CN111701162A - Flame-retardant and explosion-proof control method and device for hydrogen and oxygen mixed gas - Google Patents
Flame-retardant and explosion-proof control method and device for hydrogen and oxygen mixed gas Download PDFInfo
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- CN111701162A CN111701162A CN202010448334.0A CN202010448334A CN111701162A CN 111701162 A CN111701162 A CN 111701162A CN 202010448334 A CN202010448334 A CN 202010448334A CN 111701162 A CN111701162 A CN 111701162A
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Abstract
The invention relates to a flame-retardant and explosion-proof control method and a device for hydrogen and oxygen mixed gas. The method comprises the following steps: step 1, collecting gas parameters in a mixing chamber; wherein the gas parameter comprises a temperature within the mixing chamber; acquiring a temperature value in the mixing chamber through a temperature sensor arranged in the mixing chamber; step 2, judging whether the gas parameters exceed a preset threshold, if so, executing step 3, otherwise, returning to step 1; and 3, closing all air inlet valves entering the mixing chamber. Has the advantages that: through monitoring the temperature in the blender, judge whether unexpected burning takes place, in time cut off all air inlet pipe ways, guaranteed the safe and reliable of use, through setting up the supplementary collection module in the blender outside, can further improve safe explosion-proof level, when intracavity collection module in the blender became invalid, still can guarantee the safe and reliable of equipment use.
Description
Technical Field
The invention relates to the technical field of flame retardance and explosion prevention, in particular to a flame retardance and explosion prevention control method and device for hydrogen and oxygen mixed gas.
Background
The research on hydrogen molecules is now drawing more and more attention, and not only has rapid development in cell experiments and animal models, but also has a great deal of achievements in the treatment of diseases of patients, and in the clinical study of diseases, no toxic side effects of hydrogen molecules are found. Because oxyhydrogen is active element, especially hydrogen oxygen after the mixture takes place to explode easily, and current hydrogen manufacturing equipment does not have fire-retardant explosion-proof equipment at present, either pure hydrogen output, or pure oxygen output, consequently, rarely has oxyhydrogen to mix output, has avoided the mixed unexpected explosion risk that takes place of oxyhydrogen.
In addition, present back-fire relief device only prescribes a limit to single gas, has the hydrogen spark arrester, and there is flame arrester such as methane, and single gas spark arrester shortcoming has: 1) the mixed gas of hydrogen and oxygen can not play a role in fire retardation, and 2) the flame arrester can not be used in low-pressure single gas, because the opening conduction pressure ratio of the flame arrester is larger, and the flame arrester can reach hundreds of kPa or even MPa.
Therefore, the invention provides a flame-retardant and explosion-proof control method and a device for hydrogen and oxygen mixed gas, which can realize flame retardance and explosion prevention of the hydrogen and oxygen mixed gas so as to realize safe and reliable output of the hydrogen and oxygen at the same time at the same output port.
Disclosure of Invention
The invention provides a flame-retardant and explosion-proof control method and device for hydrogen and oxygen mixed gas, and aims to solve the problem that hydrogen and oxygen cannot be simultaneously and safely output at the same output port in the prior art.
The technical problem solved by the invention is realized by adopting the following technical scheme:
a flame-retardant and explosion-proof control method for hydrogen and oxygen mixed gas comprises the following steps:
step 1, collecting gas parameters in a mixing chamber;
wherein the gas parameter comprises a temperature within the mixing chamber; acquiring a temperature value in the mixing chamber through a temperature sensor arranged in the mixing chamber;
step 2, judging whether the gas parameters exceed a preset threshold, if so, executing step 3, otherwise, returning to step 1;
and 3, closing all air inlet valves entering the mixing chamber.
As a preferable technical solution, before returning to step 1, step 2 further comprises the following steps:
collecting temperature parameters of the outer wall of the mixing chamber; and (3) if the temperature parameter of the outer wall of the mixing chamber exceeds a preset threshold, executing the step (3), otherwise, returning to the step (1).
As a preferred technical solution, the number of points for collecting the temperature parameter of the outer wall of the mixing chamber is at least 2.
A flame-retardant and explosion-proof device for hydrogen and oxygen mixed gas comprises:
the mixing device comprises a mixing cavity, a plurality of air inlets and a plurality of air outlets, wherein at least 2 air inlets and 1 air outlet are arranged on the mixing cavity, and a one-way valve is arranged on each air inlet;
the cavity acquisition module is arranged in the mixed cavity and used for acquiring gas parameters in the mixed cavity;
the control module is electrically connected with the one-way valve and the intracavity collection module respectively; and the control module receives the gas parameters of the intracavity collection module and then judges whether the gas parameters exceed a preset threshold value, if so, all the one-way valves entering the mixing cavity are closed.
As a preferred technical solution, the device further comprises an auxiliary collection module electrically connected to the control module, wherein the number of the auxiliary collection modules is at least 2, and the auxiliary collection modules are respectively located at the outer side of the mixing cavity.
As a preferred technical scheme, the two connected auxiliary acquisition modules are symmetrically distributed on the outer side of the mixing cavity.
As a preferred technical scheme, the device also comprises an audible and visual alarm module electrically connected with the control module.
As a preferred technical scheme, a flame-retardant layer is arranged in the mixed cavity.
As a preferable technical scheme, the thickness of the shell of the mixing cavity is not less than 5 mm.
As a preferred technical solution, the shape of the mixing cavity is circular or rectangular.
Has the advantages that:
1) through monitoring the temperature in the mixer, judge whether unexpected burning takes place, in time cut off all air inlet pipe ways, guaranteed the safe and reliable of use.
2) Through setting up the supplementary collection module in the blender outside, can further improve safe explosion-proof level, when intracavity collection module in the blender became invalid, still can guarantee the safe and reliable of equipment use.
3) The gas pressure range is wide, and the gas pressure range can be suitable for 1KPa to several MPa, and even higher pressure.
4) The use occasion is flexible: the temperature and the triggering time of the triggering flame-retardant explosion-proof device can be flexibly set, the device is suitable for different occasions, the reaction speed is high, and the triggering protection time is short.
5) The service life is long: and a proper trigger temperature is set, and the trigger times are unlimited.
6) Can be used for flame retarding and explosion preventing of 2 or more than 2 mixed gases.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive exercise.
FIG. 1 is a drawing of the present invention: a step schematic diagram of an embodiment 1 of a flame-retardant and explosion-proof control method of a hydrogen and oxygen mixed gas.
FIG. 2 is a drawing of the present invention: a step schematic diagram of an embodiment 2 of a flame-retardant and explosion-proof control method of a hydrogen and oxygen mixed gas.
FIG. 3 is a drawing of the present invention: a principle schematic diagram 1 of a flame-retardant explosion-proof device of hydrogen and oxygen mixed gas.
FIG. 4 is a drawing of the present invention: a structural schematic diagram of a flame-retardant explosion-proof device of hydrogen and oxygen mixed gas.
FIG. 5 is a drawing of the present invention: a schematic diagram 2 of a flame-retardant and explosion-proof device of hydrogen and oxygen mixed gas.
Wherein:
100-mixing chamber
200-intracavity collection module
300-auxiliary acquisition module
400-control Module
101-air inlet
102-outlet port
103-one-way valve.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Example 1
Referring to fig. 1, a flame-retardant and explosion-proof control method for a hydrogen and oxygen mixed gas comprises the following steps:
step 1, collecting gas parameters in a mixing chamber;
wherein the gas parameter comprises a temperature within the mixing chamber; acquiring a temperature value in the mixing chamber through a temperature sensor arranged in the mixing chamber;
step 2, judging whether the gas parameters exceed a preset threshold, if so, executing step 3, otherwise, returning to step 1;
and 3, closing all air inlet valves entering the mixing chamber.
The flame-retardant and explosion-proof principle of the invention is as follows: when the mixed gas delivery outlet of oxyhydrogen meets static, naked light, the mixed gas of oxyhydrogen can take place the reaction in the twinkling of an eye, enters into the mixing chamber fast and burns, in order to prevent the mixing chamber and explode and split, preferably, the mixing chamber adopts temperature resistant fire-retardant firm material to make, and the thickness of its shell is not less than 5 mm. The burning of oxyhydrogen mist can lead to the inside temperature of mixing chamber to rise sharply, at this moment, sets up temperature sensor in the mixing chamber can monitor temperature variation, and temperature variation when the mixing chamber to judge whether oxyhydrogen meets the naked light burning, when the temperature is higher than preset threshold value, if judge for unexpected burning, close all entering mixing chamber air inlet valve to cut hydrogen, oxygen and enter into the mixing chamber, reach the purpose of back-fire relief, the firm shell of mixing chamber temperature resistance can prevent the risk that produces the explosion.
Example 2
Referring to fig. 2, another flame-retardant and explosion-proof control method for a hydrogen and oxygen mixed gas comprises the following steps:
step 1, collecting gas parameters in a mixing chamber;
wherein the gas parameter comprises a temperature within the mixing chamber; acquiring a temperature value in the mixing chamber through a temperature sensor arranged in the mixing chamber;
step 2, judging whether the gas parameter exceeds a preset threshold value, if not, executing the step 3, otherwise, executing the step 4;
step 3, collecting temperature parameters of the outer wall of the mixing chamber; and judging whether the temperature parameter of the outer wall of the mixing chamber exceeds a preset threshold value, if so, executing the step 4, otherwise, returning to the step 1.
And 4, closing all air inlet valves entering the mixing chamber.
This embodiment can further improve safe explosion-proof level, except monitoring the inside temperature of mixing chamber, is in when setting up during temperature sensor in the mixing chamber became invalid, through gathering the temperature parameter of mixing chamber outer wall whether takes place the burning in the monitoring mixing chamber, leads to the temperature to rise, when the temperature is higher than preset threshold value, if judge for unexpected burning, closes all entering mixing chamber air inlet valve to cut hydrogen, oxygen and enter into the mixing chamber, reach the purpose of back-fire relief, the firm shell of mixing chamber temperature resistance can prevent the risk that produces the explosion.
Example 3
Referring to fig. 3 to 5, a flame-retardant and explosion-proof device for a hydrogen and oxygen mixed gas includes: a mixing chamber 100, an intracavity collection module 200, a control module 400, and an auxiliary collection module 300. The flame retardant layer is arranged in the mixing cavity 100, the thickness of the shell of the mixing cavity 100 is not less than 5mm, and the shape of the mixing cavity 100 is circular or rectangular. The mixing chamber 100 of the present embodiment is circular in shape.
In the present invention, 2 gas inlets 101 and 1 gas outlet 102 are disposed on the mixing cavity 100, wherein the number of the gas inlets 101 may be set according to the requirement, for example, 3 or 5, and the embodiment takes 2 gas inlets 101 as an example. A check valve 103 is disposed on each gas inlet 101, and the check valve 103 is controlled by the control module 400 to open or close to control the flow of gas into the mixing chamber 100.
The intracavity collection module 200 is disposed in the mixing chamber 100 and is configured to collect gas parameters in the mixing chamber, such as temperature parameters in the mixing chamber 100; the auxiliary collecting module 300 is arranged at the outer side of the mixing cavity 100 and is used for collecting the temperature parameter of the outer wall of the mixing cavity 100; the control module 400 is electrically connected to the check valve 103, the auxiliary collection module 300, and the intracavity collection module 200, respectively.
In order to more accurately and better acquire the temperature variation of the mixing cavity 100, the two auxiliary collecting modules 300 are symmetrically distributed on the outer side of the mixing cavity 100.
The control module 400 of the present invention receives the gas parameters of the intracavity collection module 200 or the temperature parameters of the auxiliary collection module 300 and then determines whether the gas parameters exceed a preset threshold, if so, the control module closes all the check valves 103 entering the mixing cavity 100, thereby preventing the gas from continuously flowing in, reducing the combustion time, and reducing the explosion-proof risk.
The embodiment further comprises a sound and light alarm module (not shown in the figure) electrically connected with the control module 400, faults can be highlighted through the sound and light alarm module, potential safety hazards can be timely discharged, and the sound and light alarm module is mature technology and is not described herein any more.
Referring to fig. 3-5, the main workflow of the device is as follows: the hydrogen and oxygen enter the mixing cavity 100 through the gas inlet 101, so that the hydrogen and oxygen are mixed and then discharged from the gas outlet 102.
The flame-retardant and explosion-proof principle of the invention is as follows: when the oxyhydrogen mixed gas meets static electricity and open fire at the gas outlet 102, the oxyhydrogen mixed gas instantly reacts and rapidly enters the mixing cavity 100 to be combusted, the temperature inside the mixing cavity 100 is rapidly increased, the control module 400 monitors the temperature change inside the mixing cavity 100 in real time through the cavity acquisition module 200 embedded inside the mixing cavity 100, thereby judging whether oxyhydrogen gas is burnt by naked fire or not, if judging that the oxyhydrogen gas is burnt accidentally, the control module 400 closes all the one-way valves 103 entering the mixing cavity 100, thereby cutting off the hydrogen and oxygen from entering the mixing cavity 100, without inputting the hydrogen and oxygen, the fire of the mixing cavity 100 can be naturally extinguished, thereby achieving the purpose of fire resistance, the mixing cavity 100 is made of temperature-resistant, flame-retardant and firm materials, the thickness of the outer shell is not less than 5mm, and the temperature-resistant and firm outer shell of the mixing cavity 100 can prevent the explosion risk.
In order to further improve the safe explosion-proof level, a plurality of auxiliary acquisition modules 300 are respectively installed at different positions outside the mixing cavity 100, the auxiliary acquisition modules 300 are used for monitoring the temperature change of the outer wall of the mixing cavity 100, and when the acquisition modules 200 in the cavity fail, the accidental combustion is judged through the temperature change of the auxiliary acquisition modules 300 so as to achieve the purposes of fire resistance and explosion prevention.
Aiming at the safety and stability of the device, the following test operations are carried out:
the name of the experiment: flame-retardant explosion-proof verification experiment
And (3) verification date: 20200422
A verification tool: 1 oxyhydrogen health maintenance machine, 1 lighter, 1 multi-channel temperature tester, 2 wireless serial transceivers and 1 computer
The verification method comprises the following steps:
1. starting the oxyhydrogen health maintenance machine, wherein the hydrogen flow is 600ml/min, and the oxygen flow is 300ml/min
2. One wireless serial port is connected with the oxyhydrogen health machine control panel, the other wireless serial transceiver is connected with the computer USB interface, and the computer test software is opened to read the temperature of the flame-retardant and explosion-proof device of the oxyhydrogen health machine.
3. The flame-retardant explosion-proof device is ignited by a lighter, and the hydrogen and oxygen mixing output port is used for recording data as shown in the following table 1.
TABLE 1
The following verification results are obtained from the experimental data of table 1 above:
the experiment verifies that the flame-retardant explosion-proof device and the oxyhydrogen health maintenance machine are not damaged at all and have normal functional performance, and the flame-retardant explosion-proof device can play a role of flame retardance and explosion prevention if the oxyhydrogen health maintenance machine encounters open fire accidentally, so that the flame-retardant explosion-proof device is safe and reliable to use.
Specifically, the invention patent is also applicable to the mixed flame-retardant and explosion-proof of more than 2 gases, as long as each gas is added, one gas outlet 102 and one-way valve 103 are added to the device, as shown in fig. 5, 3 gas inlets 101 or more gas inlets 101 are arranged on the mixing cavity 100 of the device.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A flame-retardant and explosion-proof control method for hydrogen and oxygen mixed gas is characterized by comprising the following steps:
step 1, collecting gas parameters in a mixing chamber;
wherein the gas parameter comprises a temperature within the mixing chamber; acquiring a temperature value in the mixing chamber through a temperature sensor arranged in the mixing chamber;
step 2, judging whether the gas parameters exceed a preset threshold, if so, executing step 3, otherwise, returning to step 1;
and 3, closing all air inlet valves entering the mixing chamber.
2. The method for controlling flame retardance and explosion protection of a hydrogen-oxygen mixed gas according to claim 1, further comprising the following steps before returning to step 1 in step 2:
collecting temperature parameters of the outer wall of the mixing chamber; and (3) if the temperature parameter of the outer wall of the mixing chamber exceeds a preset threshold, executing the step (3), otherwise, returning to the step (1).
3. The method for controlling flame retardance and explosion protection of a mixed gas of hydrogen and oxygen as claimed in claim 2, wherein the number of points at which the temperature parameter of the outer wall of said mixing chamber is collected is at least 2.
4. A flame-retardant and explosion-proof device for hydrogen and oxygen mixed gas is characterized by comprising:
the mixing device comprises a mixing cavity, a plurality of air inlets and a plurality of air outlets, wherein at least 2 air inlets and 1 air outlet are arranged on the mixing cavity, and a one-way valve is arranged on each air inlet;
the cavity acquisition module is arranged in the mixed cavity and used for acquiring gas parameters in the mixed cavity;
the control module is electrically connected with the one-way valve and the intracavity collection module respectively; and the control module receives the gas parameters of the intracavity collection module and then judges whether the gas parameters exceed a preset threshold value, if so, all the one-way valves entering the mixing cavity are closed.
5. The flame-retardant and explosion-proof device for the mixed gas of hydrogen and oxygen as claimed in claim 4, further comprising at least 2 auxiliary collection modules electrically connected to the control module, wherein the auxiliary collection modules are respectively located outside the mixing chamber.
6. The flame-retardant and explosion-proof device for the mixed gas of hydrogen and oxygen as claimed in claim 5, wherein the two connected auxiliary collection modules are symmetrically distributed outside the mixing cavity.
7. The flame-retardant and explosion-proof device for the mixed gas of hydrogen and oxygen as claimed in claim 4, further comprising a sound and light alarm module electrically connected with the control module.
8. The flame-retardant and explosion-proof device for the mixed gas of hydrogen and oxygen as claimed in claim 4, wherein a flame-retardant layer is arranged in the mixing chamber.
9. A flame-retardant and explosion-proof device for hydrogen and oxygen mixed gas as claimed in claim 4, wherein the thickness of the outer shell of the mixing chamber is not less than 5 mm.
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| CN202010448334.0A CN111701162A (en) | 2020-05-25 | 2020-05-25 | Flame-retardant and explosion-proof control method and device for hydrogen and oxygen mixed gas |
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| CN202010448334.0A CN111701162A (en) | 2020-05-25 | 2020-05-25 | Flame-retardant and explosion-proof control method and device for hydrogen and oxygen mixed gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549932A (en) * | 2021-08-10 | 2021-10-26 | 中国人民解放军总医院第六医学中心 | High-concentration hydrogen breathing machine |
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2020
- 2020-05-25 CN CN202010448334.0A patent/CN111701162A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549932A (en) * | 2021-08-10 | 2021-10-26 | 中国人民解放军总医院第六医学中心 | High-concentration hydrogen breathing machine |
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