CN209739370U - Temperature-controllable fuel tank inerting device based on catalytic combustion technology - Google Patents
Temperature-controllable fuel tank inerting device based on catalytic combustion technology Download PDFInfo
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- CN209739370U CN209739370U CN201920104951.1U CN201920104951U CN209739370U CN 209739370 U CN209739370 U CN 209739370U CN 201920104951 U CN201920104951 U CN 201920104951U CN 209739370 U CN209739370 U CN 209739370U
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Abstract
the utility model discloses a controllable temperature's fuel tank inerting device based on catalytic combustion technique relates to aeronautical system technical field, can control in the oil tank and the temperature of catalytic reaction export to catalytic reaction is even. The principle of the utility model is that: the gas phase space fuel vapor and air mixture at the upper part of the fuel tank are respectively introduced into the catalytic combustion reactor by a plurality of parts. Preheating the first part of gas, decomposing fuel steam into oxygen and water vapor under the action of a catalyst, and releasing heat; the gas in front of the rest part of the gas continues to be mixed and reacted. Oxygen in the air is consumed in the reaction process, and the nitrogen-rich gas after the reaction flows into an oil tank to be flushed and inerted. The utility model discloses can operate under normal atmospheric temperature and normal pressure, inerting is efficient, only needs to preheat partly gaseous, requires lowly to gaseous preheating device, and reaction unit is even at inerting in-process temperature, and is controllable to reactor outlet temperature.
Description
Technical Field
The utility model relates to an aeronautical system technical field especially relates to a controllable temperature's fuel tank inerting device based on catalytic combustion technique.
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 of reducing the combustible risk of the fuel tank by consuming oxygen and combustible steam in a Gas phase space of the fuel tank by using a catalytic combustion method, which is called Green On-Board Inert Gas Generation System (GOBIGGS). 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.
However, the existing oxygen consumption type inerting system has the defects of large preheating quantity, uneven temperature of a catalytic reactor and difficult control of outlet temperature.
SUMMERY OF THE UTILITY MODEL
The utility model provides a controllable temperature's fuel tank inerting device based on catalytic combustion technique can control in the oil tank and the temperature of catalytic reaction export to catalytic reaction is even.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A temperature-controllable fuel tank inerting apparatus based on catalytic combustion technology, comprising: the system comprises an oxygen concentration sensor, an output fan, an electric regulating valve, a heater, a temperature sensor, a reactor, a catalytic bed, an input fan, a water separator and a controller.
The oxygen concentration sensor is arranged in the upper space of the oil tank to be operated and used for detecting the oxygen concentration on the upper part of the oil tank. The oil tank has input port and delivery outlet, and the delivery outlet of oil tank is connected the output fan, and a plurality of electrical control valve is connected to the output fan, and electrical control valve connects the space of setting between a plurality of catalytic beds in the reactor respectively, and the catalytic bed decomposes fuel steam, consumes oxygen. A temperature sensor is further arranged in a catalytic bed closest to the outlet of the reactor, the outlet of the reactor is connected with an input fan, the other end of the input fan is connected with a water separator, and the water separator is connected with the input port of an oil tank through an electric regulating valve.
All electrical control valves and temperature sensor all connect the controller, and the temperature data that temperature sensor gathered is monitored to the controller to make the judgement, turn off electrical control valve.
Furthermore, a heater is arranged in front of the inlet of the reactor, and heated gas is input into a catalytic bed to accelerate catalytic reaction.
Furthermore, a temperature sensor is arranged in each catalytic bed, so that the reaction temperature of each catalytic bed is monitored, and the catalytic reaction can be controlled more accurately.
Furthermore, an electric regulating valve connected with the water separator is also connected with a check valve, and the other end of the check valve is connected with an input port of the oil tank.
Furthermore, fire arresters are arranged at the input port and the output port of the oil tank.
The utility model has the advantages that:
The utility model introduces the mixture of fuel vapor and air in the gas phase space at the upper part of the fuel tank into the reactor, and decomposes the fuel vapor into water vapor and carbon dioxide under the action of the catalytic bed, thereby consuming oxygen and releasing heat; the amount of preheated gas is reduced by mixing the split flow with the reacted gas; the electric valve is used for adjusting the gas quantity entering the reactor, so that the reactor is cooled, the catalytic bed is at a beneficial reaction temperature, the outlet temperature of the reactor is reduced, and the fuel steam conversion rate is improved; the reacted gas is dried and rich in nitrogen and CO2, and can flow into the fuel tank for flushing and inerting without cooling, so that the purposes of fire prevention and explosion prevention of the fuel tank are achieved; the utility model has the advantages of high inerting efficiency, simple structure, controllable temperature, less preheating gas quantity, controllable temperature and the like.
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 these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the embodiment.
The system comprises an oxygen concentration sensor 1, an oil tank 2, a first flame arrester 3, an output fan 4, a first electric regulating valve 5, a second electric regulating valve 6, a third electric regulating valve 7, a heater 8, a first temperature sensor 9, a second temperature sensor 10, a third temperature sensor 11, a reactor 12, a first catalytic bed 13, a second catalytic bed 14, a third catalytic bed 15, a controller 16, an input fan 17, a water separator 18, a fourth electric regulating valve 19, a check valve 20 and a second flame arrester 21.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the following embodiments.
The embodiment of the utility model provides a controllable temperature's fuel tank inerting device based on catalytic combustion technique, as shown in figure 1, include: the system comprises an oxygen concentration sensor 1, a first flame arrester 3, an output fan 4, a first electric regulating valve 5, a second electric regulating valve 6, a third electric regulating valve 7, a heater 8, a first temperature sensor 9, a second temperature sensor 10, a third temperature sensor 11, a reactor 12, a first catalytic bed 13, a second catalytic bed 14, a third catalytic bed 15, a controller 16, an input fan 17, a water separator 18, a fourth electric regulating valve 19, a check valve 20 and a second flame arrester 21.
The probe of the oxygen concentration sensor 1 protrudes into the fuel tank 2 for measuring the oxygen concentration of the gas in the fuel tank 2 and transmits the measurement result to the controller 16. The oil tank 2 comprises a gas outlet and a gas inlet, and the gas outlet of the oil tank 2, the first flame arrester 3 and the inlet of the output fan 4 are sequentially connected through pipelines.
The outlet of the output fan 4 is respectively connected with the inlets of a first electric regulating valve 5, a second electric regulating valve 6 and a third electric regulating valve 7. The reactor 12 comprises a gas inlet end and a gas outlet end, inside which a first catalytic bed 13, a second catalytic bed 14, a third catalytic bed 15 are arranged, arranged in sequence in the reactor 12, for decomposing fuel vapors and consuming oxygen.
The first electroregulating valve 5 is connected to the inlet end of the reactor through a heater 8. Second electroregulation valve 6 opens through a duct between first catalytic bed 13 and second catalytic bed 14, and third electroregulation valve 7 opens through a duct between second catalytic bed 14 and third catalytic bed 15.
Probes of the first temperature sensor 9, the second temperature sensor 10 and the third temperature sensor 11 sequentially extend into the first catalytic bed.
The outlet end of the reactor 12, the input fan 17, the water separator 18, the fourth electric regulating valve 19, the check valve 20, the second flame arrester 21 and the inlet of the oil tank 2 are sequentially connected through pipelines, wherein the water separator 18 separates and discharges water in the gas.
the current input end of the controller 16 is respectively connected with the input fan 17, the fourth electromagnetic valve 19, the check valve 20, the output fan 4, the first electric regulating valve 5, the second electric regulating valve 6, the third electric regulating valve 7 and the heater 8.
the working process of the embodiment is as follows:
1) working process of reactor
The gas phase space fuel steam and the air mixed gas on the upper portion of the oil tank 2 pass through the first flame arrester 3 under the suction effect of the output fan 4, and are divided into three gas flows into the reactor according to a proper proportion by the first electric regulating valve 5, the second electric regulating valve 6 and the third electric regulating valve 7 after the output fan 4.
one strand of the fuel is led out by the first electric regulating valve 5, preheated by the heater 8 and then enters the first catalytic bed 13 for catalytic reaction, fuel steam is decomposed into water and carbon dioxide, oxygen is consumed, and heat is released. Two of the gas streams are adjusted by the second electric adjusting valve 6 and then introduced to be mixed with the gas after the first stream of gas is reacted, and then enter the second catalytic bed 14 for catalytic reaction, and three of the gas streams are adjusted by the third electric adjusting valve 11 and then introduced to be mixed with the gas after the first two streams of gas are reacted, and then enter the third catalytic bed 15 for catalytic reaction.
2) Inertization process
The nitrogen-rich gas at the outlet of the reactor 12 flows through the water separator 17 to remove condensed water under the suction action of the input fan 17; after sequentially flowing through the fourth electric regulating valve 19, the check valve 20 and the second flame arrester 21, the mixture flows into the oil tank 2 to be flushed and inerted;
3) Data acquisition and control process
The oxygen concentration sensor 1 detects the oxygen concentration in the gas phase space at the upper part of the oil tank 2 through a probe rod and transmits a signal to the controller 16; when the oxygen concentration is greater than a given value, the controller 16 outputs control signals to communicate the output fan 4, the input fan 17, the first electric regulating valve 5, the second electric regulating valve 6, the third electric regulating valve 7, the heater 8 and the fourth electric regulating valve 19, and the system starts to work; when the oxygen concentration is less than a given value, the system stops working;
The first temperature sensor 9 and the second temperature sensor 10 respectively measure the temperature values of the first catalytic bed 13 and the second catalytic bed 14 and transmit the signals to the controller 16; when the temperature value deviates from the given value, the controller 16 outputs control signals to communicate with the second electric control valve 6 and the third electric control valve 7 to control the adjustment flow.
The third temperature sensor 11 measures the temperature value of the third catalytic bed 11 and transmits a signal to the controller 16; when the temperature is higher than the given value, the controller 16 outputs a control signal and closes the fourth electric regulating valve 19 to prevent high-temperature gas from entering the oil tank, so that the safety of the oil tank is ensured.
The utility model has the advantages that:
The utility model introduces the mixture of fuel vapor and air in the gas phase space at the upper part of the fuel tank into the reactor, and decomposes the fuel vapor into water vapor and carbon dioxide under the action of the catalytic bed, thereby consuming oxygen and releasing heat; the amount of preheated gas is reduced by mixing the split flow with the reacted gas; the electric valve is used for adjusting the gas quantity entering the reactor, so that the reactor is cooled, the catalytic bed is at a beneficial reaction temperature, the outlet temperature of the reactor is reduced, and the fuel steam conversion rate is improved; the reacted gas is dried and rich in nitrogen and CO2, and can flow into the fuel tank for flushing and inerting without cooling, so that the purposes of fire prevention and explosion prevention of the fuel tank are achieved; the utility model has the advantages of high inerting efficiency, simple structure, controllable temperature, less preheating gas quantity, controllable temperature and the like.
The above description is only for the specific embodiments of the present invention, but the protection 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 should be covered by the protection 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. A temperature-controllable fuel tank inerting device based on catalytic combustion technology, comprising: an oxygen concentration sensor, an output fan, an electric regulating valve, a heater, a temperature sensor, a reactor, a catalytic bed, an input fan, a water separator and a controller,
The oxygen concentration sensor is arranged in the upper space of an oil tank to be operated, the oil tank is provided with an input port and an output port, the output port of the oil tank is connected with an output fan, the output fan is connected with a plurality of electric regulating valves, the electric regulating valves are respectively connected with gaps among a plurality of catalytic beds in the reactor, a temperature sensor is also arranged in the catalytic bed closest to the outlet of the reactor, the outlet of the reactor is connected with an input fan, the other end of the input fan is connected with a water separator, and the water separator is connected with the input port of the oil tank through one electric regulating;
All electric control valves and temperature sensors are connected with a controller.
2. the apparatus of claim 1, wherein a heater is disposed in front of the reactor inlet.
3. Device according to claim 1, characterized in that said temperature sensor is arranged inside each of said catalytic beds.
4. The device of claim 1, wherein the electrical control valve connected to the water separator is further connected to a check valve, the other end of the check valve being connected to the input port of the oil tank.
5. The apparatus of claim 1, wherein a flame arrestor is provided at both the inlet and outlet of the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920104951.1U CN209739370U (en) | 2019-01-22 | 2019-01-22 | Temperature-controllable fuel tank inerting device based on catalytic combustion technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920104951.1U CN209739370U (en) | 2019-01-22 | 2019-01-22 | Temperature-controllable fuel tank inerting device based on catalytic combustion technology |
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| Publication Number | Publication Date |
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| CN209739370U true CN209739370U (en) | 2019-12-06 |
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| CN201920104951.1U Expired - Fee Related CN209739370U (en) | 2019-01-22 | 2019-01-22 | Temperature-controllable fuel tank inerting device based on catalytic combustion technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109774954A (en) * | 2019-01-22 | 2019-05-21 | 南京航空航天大学 | A kind of fuel-tank inert gas device of the controllable temperature based on catalytic combustion technology |
-
2019
- 2019-01-22 CN CN201920104951.1U patent/CN209739370U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109774954A (en) * | 2019-01-22 | 2019-05-21 | 南京航空航天大学 | A kind of fuel-tank inert gas device of the controllable temperature based on catalytic combustion technology |
| CN109774954B (en) * | 2019-01-22 | 2024-03-19 | 南京航空航天大学 | Temperature-controllable fuel tank inerting device based on catalytic combustion technology |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 Termination date: 20220122 |