CN211196653U - Dry ice type inert gas making cooling type oil tank inerting system - Google Patents
Dry ice type inert gas making cooling type oil tank inerting system Download PDFInfo
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- CN211196653U CN211196653U CN201920611336.XU CN201920611336U CN211196653U CN 211196653 U CN211196653 U CN 211196653U CN 201920611336 U CN201920611336 U CN 201920611336U CN 211196653 U CN211196653 U CN 211196653U
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- Prior art keywords
- dry ice
- oil tank
- tank
- fuel
- inerting
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 235000011089 carbon dioxide Nutrition 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 title claims abstract description 13
- 239000011261 inert gas Substances 0.000 title claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 39
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 abstract description 30
- 239000002828 fuel tank Substances 0.000 abstract description 25
- 239000000203 mixture Substances 0.000 abstract description 18
- 239000000446 fuel Substances 0.000 abstract description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 11
- 239000001569 carbon dioxide Substances 0.000 abstract description 11
- 239000000295 fuel oil Substances 0.000 abstract description 11
- 238000000859 sublimation Methods 0.000 abstract description 3
- 230000008022 sublimation Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The utility model discloses a dry ice formula system inert gas cooling type oil tank inerting system belongs to the aeronautical system science and technology field, and the concrete principle is: the high-pressure container for storing the dry ice leads out low-temperature carbon dioxide generated by sublimation of the dry ice through regulating pressure, cools fuel oil vapor mixture in the fuel tank led out from a gas space at the upper part of the fuel tank through the heat exchanger, simultaneously returns the sublimated carbon dioxide gas and the cooled fuel vapor mixture to the fuel tank, replaces the original fuel vapor mixture rich in oxygen, cools the fuel vapor mixture at the upper part of the fuel tank, and reduces the fuel vapor content to achieve the aim of inerting. The utility model discloses a two kinds of inerting principles that reduce oxygen concentration content and reduce fuel steam content inerts the fuel tank, have efficient, advantages such as no compensation loss.
Description
Technical Field
The invention relates to the technical field of aviation systems, in particular to a dry ice type inert gas making cooling type oil tank inerting system.
Background
The safety problem of modern aircraft has been widely concerned by society, and fuel system combustion and explosion are one of the main reasons for the crash of aircraft. There are data showing that in the vietnam war, the united states air force is attacked by ground fire and loses thousands of airplanes, with up to 50% of the life and death due to the fire and explosion of the airplane fuel tanks. The cabin safety research technical group (GSRTG) showed a total of 370 accidents related to tank combustion and explosion for the 3726 civil aircraft accident statistics from 1966 to 2009. It follows that effective measures must be taken to prevent the explosion of the aircraft fuel tanks.
The upper space of an aircraft fuel tank is filled with combustible oil-gas mixture, the safety of the aircraft is seriously threatened by the characteristics of flammability and explosiveness, and effective measures must be taken to reduce the probability of ignition and outbreak and reduce the hazard degree of the aircraft. In the oil tank protection system, the oxygen concentration in the gas phase space at the upper part of the oil tank is reduced, so that the oil tank can be prevented from being ignited and exploded, and the safety of passengers and airplanes is ensured. The fuel tank inerting can be carried out by reducing the oxygen concentration of the fuel tank by using inert gases such as nitrogen, carbon dioxide and the like, so that the oxygen content is reduced to be below the combustible limit. In recent years, companies and research institutions at home and abroad are also carrying out a method for reducing the combustible risk of an oil tank by consuming oxygen and combustible steam in a gas phase space of the oil tank by adopting a catalytic combustion method, which is called as a green inerting technology. This new inerting technique has several important advantages: the starting speed is high, and in addition, oxygen is consumed in the reactor, the inerting efficiency is high, and the time is short; fuel steam is not discharged outwards, and the environment is protected.
Although these new inerting techniques are highly effective in inerting and can continuously increase the nitrogen-rich gas to inerte the fuel tank, they are expensive to manufacture, heavy in weight and not suitable for civil aircraft.
The invention provides a novel inerting mode, which has simple structure, light weight and low cost and is suitable for civil aircrafts.
Disclosure of Invention
The invention provides a dry ice type inert gas preparation cooling type oil tank inerting system which has the advantages of high efficiency, no compensation loss and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dry ice type inert gas preparation cooling type fuel tank inerting system comprises a dry ice storage tank, a pressure regulating valve, a heat exchanger, a dryer and a fan.
The oil tank to be operated is provided with two inlet ends and one outlet end, the dry ice storage tank, the pressure regulating valve and the cold side inlet of the heat exchanger are sequentially connected through pipelines, and the cold side outlet of the heat exchanger is connected with one inlet end of the oil tank.
The outlet end of the oil tank is connected with a hot side inlet of the heat exchanger through a fan, a hot side outlet of the heat exchanger is connected with the other inlet end of the oil tank through a dryer, the inlet end of the oil tank is also connected with a gas outlet, and the gas outlet is provided with a switch.
Further, set up between stop valve, desicator and the oil tank between voltage regulator and the heat exchanger and set up the third electrical control valve between first electrical control valve, fan and the oil tank, the switch of gas outlet is second electrical control valve.
Furthermore, the pressure regulating valve, the stop valve, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, the heat exchanger and the fan are all connected with the controller.
Further, the controller is also connected with an oxygen concentration sensor, and the oxygen concentration sensor is arranged inside the oil tank.
Further, the controller is also connected with a temperature sensor, and the temperature sensor is arranged inside the oil tank.
The invention has the beneficial effects that:
the high-pressure container for storing the dry ice is led out by adjusting the pressure to produce low-temperature carbon dioxide generated by sublimation of the dry ice, the fuel oil vapor mixture in the fuel tank led out from the gas space at the upper part of the fuel tank is cooled by the heat exchanger, meanwhile, the sublimated carbon dioxide gas and the cooled fuel oil vapor mixture are returned to the fuel tank, the fuel oil vapor mixture originally rich in oxygen is replaced, meanwhile, the fuel oil vapor mixture at the upper part of the fuel tank is cooled, and the fuel oil vapor content is reduced to achieve the aim of inerting. The invention inerts the fuel tank by two inerting principles of reducing the oxygen concentration content and reducing the fuel steam content, and has the advantages of high efficiency and no compensation loss.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments 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 it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the embodiment.
The system comprises a dry ice storage tank 1, a dry ice storage tank 2, a pressure regulating valve 3, a stop valve 4, a heat exchanger 5, a dryer 6, a first electric regulating valve 7, a second electric regulating valve 8, a temperature sensor 9, an oxygen concentration sensor 10, an oil tank 10, a fan 11, a third electric regulating valve 12 and a controller 13.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following detailed description.
An embodiment of the present invention provides a dry ice type inert gas making cooling type oil tank inerting system, as shown in fig. 1, including: the dry ice storage tank comprises a dry ice storage tank 1, a pressure regulating valve 2, a stop valve 3, a heat exchanger 4, a dryer 5, a first electric regulating valve 6, a second electric regulating valve 7, a temperature sensor 8, an oxygen concentration sensor 9, a fan 11, a third electric regulating valve 12 and a controller 13.
The tank 10 has two inlet ends and one outlet end. Probes of the oxygen concentration sensor 9 and the temperature sensor 8 extend into the upper space of the oil tank 10 to be operated, and detect the oxygen concentration and the temperature on the upper part of the oil tank 10.
The dry ice storage tank 1, the pressure regulating valve 2, the stop valve 3 and the cold side inlet of the heat exchanger 4 are sequentially connected through pipelines. The cold side outlet of the heat exchanger 4 is connected to one of the inlet ports of the oil tank 10.
The outlet end of the oil tank 10, the third electric regulating valve 12, the fan 11 and the hot side inlet of the heat exchanger 4 are sequentially connected through pipelines. And a hot side outlet of the heat exchanger 4, the dryer 5 and the first electric regulating valve 6 are sequentially connected through pipelines.
The outlet of the first electric regulating valve 6, the inlet of the second electric regulating valve 7 and the other inlet end of the oil tank 10 are connected through pipelines.
The working process of the embodiment is as follows:
1) carbon dioxide scrubbing inerting process
The dry ice storage tank 1 releases carbon dioxide gas under the action of the pressure regulating valve 2, the carbon dioxide gas passes through the stop valve 3 and the cold side channel of the heat exchanger 4 and then enters the inlet of the oil tank 10, flammable fuel steam mixture in the oil tank 10 is discharged, and the oil tank 10 is inerted.
2) Cooling inerting process
Under the attraction of the fan 11, the fuel vapor mixture on the upper part of the fuel tank 10 passes through the hot side channel of the third electric regulating valve 12, which enters the heat exchanger 4, the temperature of the fuel vapor mixture becomes low under the heat exchange action of the low-temperature carbon dioxide, and then the water vapor is removed through the dryer 5, and the fuel vapor mixture is regulated and guided into the fuel tank 10 through the first electric regulating valve 6, so that the internal temperature of the fuel tank 10 is reduced, and the fuel vapor content of the fuel vapor mixture becomes low, thereby achieving the purpose of inerting. In order to keep the gas pressure in the oil tank 10 balanced, the excess gas is discharged out of the system under the regulation of the second electric regulating valve 7.
3) Data acquisition and control process
Probes of the oxygen concentration sensor 9 and the temperature sensor 10 extend into the upper space of the oil tank 10 and are used for monitoring the oxygen concentration and the temperature in the space and transmitting the data to the controller 13.
When the oxygen concentration is higher than the set value, the controller 13 outputs signals to control the pressure regulating valve 2, the stop valve 3, the first electric regulating valve 6, the second electric regulating valve 7, the third electric regulating valve 12, the heat exchanger 4 and the fan 11 to work, and when the oxygen concentration is lower than the set value, the devices are controlled to stop working.
The controller adopts a V80-C aviation special P L C module, the temperature sensor adopts a PT1000 temperature sensor, the oxygen concentration sensor adopts a TY-3500-C zirconia oxygen concentration sensor, the electric regulating valve adopts an HJS-63A electric regulating valve, the data acquisition and the control switch function of the controller are all common knowledge in the field, and the controller can be realized by technicians in the field without creative work.
The invention has the beneficial effects that:
the high-pressure container for storing the dry ice leads out low-temperature carbon dioxide generated by sublimation of the dry ice through regulating the pressure, cools fuel oil vapor mixture in the fuel tank led out from a gas space at the upper part of the fuel tank through the heat exchanger, returns the sublimated carbon dioxide gas and the cooled fuel oil vapor mixture to the fuel tank, replaces the original fuel oil vapor mixture rich in oxygen, cools the fuel oil vapor mixture at the upper part of the fuel tank, and reduces the fuel oil vapor content to achieve the aim of inerting. The invention inerts the fuel tank by two inerting principles of reducing the oxygen concentration content and reducing the fuel steam content, and has the advantages of high efficiency, no compensation loss and the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a dry ice formula system inert gas cooling formula oil tank inerting system which characterized in that: comprises a dry ice storage tank (1), a pressure regulating valve (2), a heat exchanger (4), a dryer (5) and a fan (11),
the oil tank (10) to be operated is provided with two inlet ends and an outlet end, the dry ice storage tank (1), the pressure regulating valve (2) and the cold side inlet of the heat exchanger (4) are sequentially connected through a pipeline, and the cold side outlet of the heat exchanger (4) is connected with one inlet end of the oil tank (10);
the outlet end of the oil tank (10) is connected with the hot side inlet of the heat exchanger (4) through the fan (11), the hot side outlet of the heat exchanger (4) is connected with the other inlet end of the oil tank (10) through the dryer (5), the inlet end of the oil tank (10) is also connected with the gas outlet, and the gas outlet is provided with a switch.
2. A dry ice type inerting gas cooling type oil tank inerting system according to claim 1, wherein a stop valve (3) is arranged between the pressure regulating valve (2) and the heat exchanger (4), a first electric control valve (6) is arranged between the dryer (5) and the oil tank (10), a third electric control valve (12) is arranged between the blower (11) and the oil tank (10), and the gas outlet is opened or closed by a second electric control valve (7).
3. The dry ice type inerting gas cooling type oil tank inerting system according to claim 2, wherein the pressure regulating valve (2), the stop valve (3), the first electric regulating valve (6), the second electric regulating valve (7), the third electric regulating valve (12), the heat exchanger (4) and the fan (11) are all connected with the controller (13).
4. A dry ice type inerting gas cooling tank inerting system as claimed in claim 3, wherein the controller (13) is further connected to an oxygen concentration sensor (9), and the oxygen concentration sensor (9) is disposed inside the tank (10).
5. A dry ice type inerting gas cooling tank inerting system as claimed in claim 3, wherein the controller (13) is further connected to a temperature sensor (8), and the temperature sensor (8) is disposed inside the tank (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611336.XU CN211196653U (en) | 2019-04-30 | 2019-04-30 | Dry ice type inert gas making cooling type oil tank inerting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611336.XU CN211196653U (en) | 2019-04-30 | 2019-04-30 | Dry ice type inert gas making cooling type oil tank inerting system |
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| Publication Number | Publication Date |
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| CN211196653U true CN211196653U (en) | 2020-08-07 |
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| CN201920611336.XU Active CN211196653U (en) | 2019-04-30 | 2019-04-30 | Dry ice type inert gas making cooling type oil tank inerting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110294136A (en) * | 2019-04-30 | 2019-10-01 | 南京航空航天大学 | A kind of dry ice formula noble gas cooled fuel tank inerting system |
| CN110294136B (en) * | 2019-04-30 | 2024-06-11 | 南京航空航天大学 | Dry ice type inert gas making cooling type oil tank inerting system |
-
2019
- 2019-04-30 CN CN201920611336.XU patent/CN211196653U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110294136A (en) * | 2019-04-30 | 2019-10-01 | 南京航空航天大学 | A kind of dry ice formula noble gas cooled fuel tank inerting system |
| CN110294136B (en) * | 2019-04-30 | 2024-06-11 | 南京航空航天大学 | Dry ice type inert gas making cooling type oil tank inerting system |
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