Aircraft green inerting system with water removal function

Abstract

The invention discloses an aircraft green inerting system with a water removal function. The aircraft green inerting system comprises an oil tank, a catalytic reactor, a water removal device and a control system. The system extracts oxygen and fuel oil steam in an oil tank through a first fan, the oxygen and the fuel oil steam are mixed with ram air, then the mixture is heated through an electric heater and burnt in a catalytic reactor to generate high-temperature inert gas, then the high-temperature inert gas is subjected to water removal through a first water separator, cooling through a heat exchanger, pressurization through a compressor and secondary water removal through a second water separator in sequence, and pressure reduction and temperature reduction are conducted through a cooling turbine; finally, low-temperature dry inert gas is formed and is reinjected into an oil tank through a fuel oil ejector, and the dual functions of inerting and water removal are achieved. The system monitors in real time through an oxygen concentration sensor, a temperature sensor and a flow sensor, dynamically adjusts the electric heating power and the rotating speed of a valve and a fan, and ensures safe and efficient operation. Catalytic combustion and high-pressure water removal technologies are combined, the oxygen concentration of the fuel tank and the water content of fuel are effectively reduced, and the device is energy-saving, environment-friendly, efficient in inerting and suitable for safety protection of various aircraft fuel systems.

Description

Technical Field

[0001] The present invention relates to the technical field of fire prevention and explosion prevention, and in particular to a green inerting system for an aircraft with a water removal function. Background Art

[0002] The fuel tank is a core component of an aircraft, storing and transporting fuel, adjusting the aircraft's center of gravity, cooling electronic equipment, regulating the forces acting on the wing structure, and performing a host of other functions. The reliability and safety of the fuel tank critically impact the safety of the entire aircraft. During flight, the presence of oxygen and fuel vapor within the tank, along with microscopic wear and tear caused by its internal structure, materials, and processing techniques over time, can lead to fuel tank failure and leakage. A leaking fuel tank can come into contact with the surrounding oxygen, sparking or even exploding, potentially causing a serious accident. Therefore, civil airlines, in accordance with Federal Aviation Administration (FAA) standards, install fuel tank inerting devices on their aircraft to prevent explosions and enhance flight safety.

[0003] In fuel tank inerting systems, the separation properties of hollow fiber membranes are often used to produce nitrogen-rich gas. Hollow fiber membranes are a type of porous membrane material with a pore structure and are commonly used for gas separation and purification.

[0004] Inside the hollow fiber membrane, gases are separated by the selective permeation effect of the membrane pores. Due to the different characteristics of different gas molecules such as size, polarity and interaction force, nitrogen molecules are relatively small when passing through the hollow fiber membrane, so they can more easily pass through the membrane pores, while other gases are discharged from the other side. By adjusting the operating conditions and controlling the flow rate, a higher concentration of nitrogen-rich gas can be collected. However, the on-board nitrogen inert gas generation system (OBIGGS) technology for producing nitrogen-rich gas based on hollow fiber membranes has some problems, such as the hollow fiber membrane is easily contaminated during use and needs to be cleaned or replaced regularly, the separation efficiency of the hollow fiber membrane is low, the manufacturing cost of the hollow fiber membrane is high, and safety issues such as leakage and fire need to be prevented during use.

[0005] In recent years, some research institutions have developed "green inerting technology," which involves burning oxygen and combustible steam in the fuel tank's gas phase in a catalytic reactor to produce carbon dioxide and water. The resulting product, along with unreacted inert gas, passes through a water removal device and then back into the fuel tank, reducing the risk of flammability. Compared to other inerting technologies, this method offers advantages such as energy conservation, environmental protection, and high reaction efficiency.

[0006] Water in the fuel tank may have an adverse effect on flight. When a large amount of liquid water is transported to the engine, it may cause the engine to stall. Liquid water at the bottom of the tank provides an environment for the growth of microorganisms. The production of microorganisms can cause a series of problems such as corrosion, pipe blockage, and increased maintenance costs. Therefore, removing liquid water from the fuel tank is an essential step to ensure flight safety. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a green inerting system for aircraft with a water removal function in view of the defects involved in the background technology.

[0008] The present invention adopts the following technical solutions to solve the above technical problems: An aircraft green inerting system with a water removal function includes a fuel tank, first to third flame arresters, first to second check valves, first to second fans, first to second heat exchangers, a flow sensor, an electric heater, first to second temperature sensors, a catalytic reactor, first to second water separators, a compressor, an electric motor, a water storage tank, a cooling turbine, first to third electric regulating valves, a fuel ejector, an oil pump, a three-way valve, an oxygen concentration sensor, and a control module; The oil tank is provided with a water vapor outlet above the oil liquid therein, and a fuel outlet and an oil-gas mixture inlet at the bottom of the tank; The water vapor outlet of the oil tank, the first flame arrester, the first check valve, and the inlet of the first fan are connected in sequence through pipelines; The outlet of the first fan is connected to the cold side channel inlet of the first heat exchanger and one end of the second electric regulating valve through pipelines respectively; The cold side channel outlet of the first heat exchanger, the electric heater, the second flame arrester, the catalytic reactor, and the gas inlet of the first water separator are connected in sequence through pipelines; The catalytic reactor comprises a shell, a first baffle, and a second baffle; the shell is a sealed cavity with a gas inlet and a gas outlet; the first baffle and the second baffle are arranged in parallel within the shell, located between the gas inlet and the gas outlet, and a plurality of guide holes are evenly provided on the first baffle and the second baffle; the shell is filled with a Pt-Pd / Rh three-way catalyst with a cordierite honeycomb ceramic as a carrier between the first baffle and the second baffle; The hot side channel inlet of the first heat exchanger and the gas outlet of the first water separator are connected via a pipeline, and the hot side channel outlet of the first heat exchanger, the compressor, and the hot side channel inlet of the second heat exchanger are connected via pipelines in sequence; The liquid water outlet of the first water separator is connected to the outside to discharge the separated liquid water; The hot side channel outlet of the second heat exchanger is connected to the gas inlet of the second water separator through a pipeline, the cold side channel inlet is connected to one end of the third electric regulating valve through a pipeline, and the cold side channel outlet is connected to the outside; The liquid water outlet of the second water separator is connected to the water tank through a pipeline, and the gas outlet of the second water separator, the cooling turbine, the first electric regulating valve, the second check valve, the third flame arrester, and the gas inlet of the fuel injector are connected in sequence through pipelines; The rotating shaft of the cooling turbine is coaxially connected to the rotating shaft of the compressor, and is used to reduce the temperature of the inert gas through expansion and cooling, while driving the compressor to operate to reduce the energy consumption of the motor; The oil-gas mixture outlet of the fuel ejector is connected to the oil-gas mixture inlet of the fuel tank through a pipeline; The inlet of the oil pump is connected to the fuel outlet of the fuel tank through a pipeline, and the outlet is connected to the fuel inlet of the fuel ejector through a pipeline; The outlet of the second fan and the inlet of the three-way valve are connected through a pipeline, and the inlet is connected to the external ram air or the air bleed of the environmental control system; One outlet of the three-way valve is connected to the other end of the second electric regulating valve through a pipeline, and the other outlet is connected to the other end of the third electric regulating valve through a pipeline; The flow sensor is arranged in the pipe at the inlet of the electric heater, and is used to sense the flow at the inlet of the electric heater and transmit it to the control module; The first temperature sensor is arranged in the pipe at the outlet of the electric heater, and is used to sense the temperature at the outlet of the electric heater and transmit it to the control module; The second temperature sensor is arranged in the pipeline at the inlet of the first electric regulating valve, and is used to sense the temperature at the inlet of the first electric regulating valve and transmit it to the control module; The probe of the oxygen concentration sensor extends into the top of the fuel tank to sense the oxygen concentration of the air in the fuel tank and transmit it to the control module; The output shaft of the motor is coaxially fixedly connected to the input shaft of the compressor, and is used to drive the compressor to work; The control module is electrically connected to the oxygen concentration sensor, flow sensor, first temperature sensor, second temperature sensor, first fan, electric heater, second fan, first electric regulating valve, second electric regulating valve, third electric regulating valve and motor respectively, and is used to control the operation of the first fan, electric heater, second fan, first electric regulating valve, second electric regulating valve and third electric regulating valve according to the sensing data of the oxygen concentration sensor, flow sensor, first temperature sensor and second temperature sensor.

[0009] As a further optimization solution of the aircraft green inerting system with water removal function of the present invention, a stainless steel anti-backfire wire mesh is provided at the gas outlet of the shell of the catalytic reactor.

[0010] As a further optimization solution of the aircraft green inerting system with water removal function of the present invention, the shell of the catalytic reactor comprises a stainless steel layer, an aluminum silicate-filled refractory fiber layer and a stainless steel layer from the inside to the outside.

[0011] The present invention also discloses a control method for the aircraft green inerting system with water removal function, which includes the following process: When the oxygen concentration sensor senses that the oxygen concentration in the upper space of the fuel tank is higher than the preset oxygen concentration upper limit threshold, the control module synchronously turns on the first blower, the second blower, the electric heater, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, and starts the motor; When the oxygen concentration sensor senses that the oxygen concentration in the upper space of the fuel tank is lower than the preset oxygen concentration lower limit threshold, the control module synchronously turns off the first blower, the second blower, the electric heater, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, and stops the motor; When the flow sensor detects that the gas flow at the inlet of the electric heater is less than a preset lower flow threshold, the control module increases the opening of the second electric regulating valve according to the preset opening threshold, thereby increasing the amount of supplementary air; when the flow sensor detects that the gas flow at the inlet of the electric heater is greater than a preset upper flow threshold, the control module decreases the opening of the second electric regulating valve according to the preset opening threshold, thereby reducing the amount of supplementary air; When the first temperature sensor detects that the gas temperature at the outlet of the electric heater is lower than a preset first temperature lower limit threshold, the control module increases the heating power of the electric heater according to the preset power threshold; when the first temperature sensor detects that the gas temperature at the outlet of the electric heater is higher than a preset first temperature upper limit threshold, the control module reduces the heating power of the electric heater according to the preset power threshold; When the second temperature sensor detects that the gas temperature at the inlet of the first electric control valve is greater than the preset second temperature upper limit threshold, the control module closes the first electric control valve, cutting off the passage of high-temperature gas into the fuel tank; when the second temperature sensor detects that the gas temperature at the inlet of the first electric control valve is lower than the preset second temperature lower limit threshold, the control module reopens the first electric control valve and restores the normal working process of the system.

[0012] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: This invention utilizes green inerting technology, catalytically combusting fuel vapor and oxygen to produce water and carbon dioxide. This mixture passes through a high-pressure water removal system and a boosted air circulation system for drying and cooling, before entering the fuel tank to cool the fuel and perform washing and inerting. The solubility of water in fuel decreases with temperature, and the dry, low-temperature inerting gas utilizes this solubility difference to absorb oxygen and water from the fuel. This system offers advantages such as energy conservation, improved system inerting performance, and a shortened inerting time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of an aircraft inerting system with a water removal function; In the figure, 1-fuel tank, 2-first flame arrester, 3-first check valve, 4-first fan, 5-first heat exchanger, 6-flow sensor, 7-electric heater, 8-first temperature sensor, 9-second flame arrester, 10-catalytic reactor, 11-first water separator, 12-compressor, 101-electric motor, 13-second heat exchanger, 14-second water separator, 15-water storage tank, 16-cooling turbine, 17-second temperature sensor, 18-first electric regulating valve, 19-second check valve, 20-third flame arrester, 21-fuel ejector, 22-fuel pump, 23-second fan, 24-three-way valve, 25-second electric regulating valve, 26-third electric regulating valve, 27-control module, 28-oxygen concentration sensor. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings: The present invention can be implemented in many different forms and should not be considered to be limited to the embodiments described herein. On the contrary, these embodiments are provided to make this disclosure thorough and complete and will fully convey the scope of the invention to those skilled in the art. In the accompanying drawings, components are enlarged for clarity.

[0015] It should be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, and / or parts, these elements, components, and / or parts are not limited by these terms. These terms are merely used to distinguish elements, components, and / or parts from each other. Therefore, the first element, component, and / or part discussed below can become the second element, component, or part without departing from the teachings of the present invention.

[0016] like Figure 1As shown, the present invention discloses an aircraft green inerting system with a water removal function, comprising a fuel tank, first to third flame arresters, first to second check valves, first to second fans, first to second heat exchangers, a flow sensor, an electric heater, first to second temperature sensors, a catalytic reactor, first to second water separators, a compressor, an electric motor, a water storage tank, a cooling turbine, first to third electric regulating valves, a fuel ejector, an oil pump, a three-way valve, an oxygen concentration sensor, and a control module; The oil tank is provided with a water vapor outlet above the oil liquid therein, and a fuel outlet and an oil-gas mixture inlet at the bottom of the tank; The water vapor outlet of the oil tank, the first flame arrester, the first check valve, and the inlet of the first fan are connected in sequence through pipelines; The outlet of the first fan is connected to the cold side channel inlet of the first heat exchanger and one end of the second electric regulating valve through pipelines respectively; The cold side channel outlet of the first heat exchanger, the electric heater, the second flame arrester, the catalytic reactor, and the gas inlet of the first water separator are connected in sequence through pipelines; The catalytic reactor comprises a shell, a first baffle, and a second baffle; the shell is a sealed cavity with a gas inlet and a gas outlet; the first baffle and the second baffle are arranged in parallel within the shell, located between the gas inlet and the gas outlet, and a plurality of guide holes are evenly provided on the first baffle and the second baffle; the shell is filled with a Pt-Pd / Rh three-way catalyst with a cordierite honeycomb ceramic as a carrier between the first baffle and the second baffle; The hot side channel inlet of the first heat exchanger and the gas outlet of the first water separator are connected via a pipeline, and the hot side channel outlet of the first heat exchanger, the compressor, and the hot side channel inlet of the second heat exchanger are connected via pipelines in sequence; The liquid water outlet of the first water separator is connected to the outside to discharge the separated liquid water; The hot side channel outlet of the second heat exchanger is connected to the gas inlet of the second water separator through a pipeline, the cold side channel inlet is connected to one end of the third electric regulating valve through a pipeline, and the cold side channel outlet is connected to the outside; The liquid water outlet of the second water separator is connected to the water tank through a pipeline, and the gas outlet of the second water separator, the cooling turbine, the first electric regulating valve, the second check valve, the third flame arrester, and the gas inlet of the fuel injector are connected in sequence through pipelines; The rotating shaft of the cooling turbine is coaxially connected to the rotating shaft of the compressor, and is used to reduce the temperature of the inert gas through expansion and cooling, while driving the compressor to operate to reduce the energy consumption of the motor; The oil-gas mixture outlet of the fuel ejector is connected to the oil-gas mixture inlet of the fuel tank through a pipeline; The inlet of the oil pump is connected to the fuel outlet of the fuel tank through a pipeline, and the outlet is connected to the fuel inlet of the fuel ejector through a pipeline; The outlet of the second fan and the inlet of the three-way valve are connected through a pipeline, and the inlet is connected to the external ram air or the air bleed of the environmental control system; One outlet of the three-way valve is connected to the other end of the second electric regulating valve through a pipeline, and the other outlet is connected to the other end of the third electric regulating valve through a pipeline; The flow sensor is arranged in the pipe at the inlet of the electric heater, and is used to sense the flow at the inlet of the electric heater and transmit it to the control module; The first temperature sensor is arranged in the pipe at the outlet of the electric heater, and is used to sense the temperature at the outlet of the electric heater and transmit it to the control module; The second temperature sensor is arranged in the pipeline at the inlet of the first electric regulating valve, and is used to sense the temperature at the inlet of the first electric regulating valve and transmit it to the control module; The probe of the oxygen concentration sensor extends into the top of the fuel tank to sense the oxygen concentration of the air in the fuel tank and transmit it to the control module; The output shaft of the motor is coaxially fixedly connected to the input shaft of the compressor, and is used to drive the compressor to work; The control module is electrically connected to the oxygen concentration sensor, flow sensor, first temperature sensor, second temperature sensor, first fan, electric heater, second fan, first electric regulating valve, second electric regulating valve, third electric regulating valve and motor respectively, and is used to control the operation of the first fan, electric heater, second fan, first electric regulating valve, second electric regulating valve and third electric regulating valve according to the sensing data of the oxygen concentration sensor, flow sensor, first temperature sensor and second temperature sensor.

[0017] The gas outlet of the shell of the catalytic reactor is preferably provided with a stainless steel anti-tempering wire mesh, and the shell comprises a stainless steel layer, an aluminum silicate-filled refractory fiber layer and a stainless steel layer from the inside to the outside.

[0018] The control method of the present invention is as follows: When the oxygen concentration sensor senses that the oxygen concentration in the upper space of the fuel tank is higher than the preset oxygen concentration upper limit threshold, the control module synchronously turns on the first blower, the second blower, the electric heater, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, and starts the motor; When the oxygen concentration sensor senses that the oxygen concentration in the upper space of the fuel tank is lower than the preset oxygen concentration lower limit threshold, the control module synchronously turns off the first blower, the second blower, the electric heater, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, and stops the motor; When the flow sensor detects that the gas flow at the inlet of the electric heater is less than a preset lower flow threshold, the control module increases the opening of the second electric regulating valve according to the preset opening threshold, thereby increasing the amount of supplementary air; when the flow sensor detects that the gas flow at the inlet of the electric heater is greater than a preset upper flow threshold, the control module decreases the opening of the second electric regulating valve according to the preset opening threshold, thereby reducing the amount of supplementary air; When the first temperature sensor detects that the gas temperature at the outlet of the electric heater is lower than a preset first temperature lower limit threshold, the control module increases the heating power of the electric heater according to the preset power threshold; when the first temperature sensor detects that the gas temperature at the outlet of the electric heater is higher than a preset first temperature upper limit threshold, the control module reduces the heating power of the electric heater according to the preset power threshold; When the second temperature sensor detects that the gas temperature at the inlet of the first electric control valve is greater than the preset second temperature upper limit threshold, the control module closes the first electric control valve, cutting off the passage of high-temperature gas into the fuel tank; when the second temperature sensor detects that the gas temperature at the inlet of the first electric control valve is lower than the preset second temperature lower limit threshold, the control module reopens the first electric control valve and restores the normal working process of the system.

[0019] The working process of the present invention is as follows: Oxygen and fuel vapor in the upper part of the fuel tank are drawn by the first blower and flow sequentially through the first flame arrester and the first check valve. The gas flowing out of the first blower mixes with the ram air or environmentally controlled bleed air passing through the second regulating valve, and the mixed gas is preheated by passing through the cold side channel of the first heat exchanger. The preheated gas is heated to the temperature required for the catalytic reaction by an electric heater. The heated mixed gas passes through the first temperature sensor and the second flame arrester. The high-temperature steam undergoes a catalytic combustion reaction in the catalytic reactor, and the hydrocarbons in the mixed gas burn to produce carbon dioxide and water, which mix with other non-reactive gases to form high-temperature, high-humidity inert gas. The hot, high-humidity gas after the reaction first passes through the first water separator to remove excess water produced by the catalytic reaction, and then passes through the first heat exchanger for preliminary cooling. The gas is further compressed by the compressor, where the electric motor provides initial power to the compressor to ensure its normal operation. The compressed gas is cooled a second time by passing through the second heat exchanger. The cooled gas separates into liquid water in the second water separator, which is then connected to a water storage tank to provide liquid water for the aircraft. The shaft of the cooling turbine is connected to the shaft of the compressor. The gas after water removal in the second water separator is cooled and decompressed in the cooling turbine, which also provides power for the operation of the compressor. The low-temperature dry inert gas passes through the second temperature sensor, the first electric regulating valve, the second check valve, the third flame arrester, and the fuel ejector gas inlet in sequence before entering the fuel tank; the low-temperature dry inert gas washes and inerts the fuel tank, reducing the oxygen concentration in the fuel and gas phase space; the low-temperature inert gas entering the fuel tank lowers the fuel temperature, thereby reducing the solubility of water in the fuel; and at the same time, the dry inert gas absorbs moisture from the fuel, reducing the water content in the fuel.

[0020] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art in the art to which this invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such, will not be interpreted in an idealized or overly formal sense.

[0021] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A green inerting system for aircraft with water removal function, characterized in that: It includes a fuel tank, first to third flame arresters, first to second check valves, first to second fans, first to second heat exchangers, a flow sensor, an electric heater, first to second temperature sensors, a catalytic reactor, first to second water separators, a compressor, an electric motor, a water storage tank, a cooling turbine, first to third electric regulating valves, a fuel ejector, an oil pump, a three-way valve, an oxygen concentration sensor, and a control module; The oil tank is provided with a water vapor outlet above the oil liquid therein, and a fuel outlet and an oil-gas mixture inlet at the bottom of the tank; The water vapor outlet of the oil tank, the first flame arrester, the first check valve, and the inlet of the first fan are connected in sequence through pipelines; The outlet of the first fan is connected to the cold side channel inlet of the first heat exchanger and one end of the second electric regulating valve through pipelines respectively; The cold side channel outlet of the first heat exchanger, the electric heater, the second flame arrester, the catalytic reactor, and the gas inlet of the first water separator are connected in sequence through pipelines; The catalytic reactor comprises a shell, a first baffle, and a second baffle; the shell is a sealed cavity with a gas inlet and a gas outlet; the first baffle and the second baffle are arranged in parallel within the shell, located between the gas inlet and the gas outlet, and a plurality of guide holes are evenly provided on the first baffle and the second baffle; the shell is filled with a Pt-Pd / Rh three-way catalyst with a cordierite honeycomb ceramic as a carrier between the first baffle and the second baffle; The hot side channel inlet of the first heat exchanger and the gas outlet of the first water separator are connected by a pipeline, and the hot side channel outlet of the first heat exchanger, the compressor, and the hot side channel inlet of the second heat exchanger are connected by pipelines in sequence; The liquid water outlet of the first water separator is connected to the outside to discharge the separated liquid water; The hot side channel outlet of the second heat exchanger is connected to the gas inlet of the second water separator through a pipeline, the cold side channel inlet is connected to one end of the third electric regulating valve through a pipeline, and the cold side channel outlet is connected to the outside; The liquid water outlet of the second water separator is connected to the water tank through a pipeline, and the gas outlet of the second water separator, the cooling turbine, the first electric regulating valve, the second check valve, the third flame arrester, and the gas inlet of the fuel injector are connected in sequence through pipelines; The rotating shaft of the cooling turbine is coaxially connected to the rotating shaft of the compressor, and is used to reduce the temperature of the inert gas through expansion and cooling, while driving the compressor to operate to reduce the energy consumption of the motor; The oil-gas mixture outlet of the fuel ejector is connected to the oil-gas mixture inlet of the fuel tank through a pipeline; The inlet of the oil pump is connected to the fuel outlet of the fuel tank through a pipeline, and the outlet is connected to the fuel inlet of the fuel ejector through a pipeline; The outlet of the second fan and the inlet of the three-way valve are connected through a pipeline, and the inlet is connected to the external ram air or the air bleed of the environmental control system; One outlet of the three-way valve is connected to the other end of the second electric regulating valve through a pipeline, and the other outlet is connected to the other end of the third electric regulating valve through a pipeline; The flow sensor is arranged in the pipe at the inlet of the electric heater, and is used to sense the flow at the inlet of the electric heater and transmit it to the control module; The first temperature sensor is arranged in the pipe at the outlet of the electric heater, and is used to sense the temperature at the outlet of the electric heater and transmit it to the control module; The second temperature sensor is arranged in the pipeline at the inlet of the first electric regulating valve, and is used to sense the temperature at the inlet of the first electric regulating valve and transmit it to the control module; The probe of the oxygen concentration sensor extends into the top of the fuel tank to sense the oxygen concentration of the air in the fuel tank and transmit it to the control module; The output shaft of the motor is coaxially fixedly connected to the input shaft of the compressor, and is used to drive the compressor to work; The control module is electrically connected to the oxygen concentration sensor, flow sensor, first temperature sensor, second temperature sensor, first fan, electric heater, second fan, first electric regulating valve, second electric regulating valve, third electric regulating valve and motor respectively, and is used to control the operation of the first fan, electric heater, second fan, first electric regulating valve, second electric regulating valve and third electric regulating valve according to the sensing data of the oxygen concentration sensor, flow sensor, first temperature sensor and second temperature sensor.

2. The aircraft green inerting system with water removal function according to claim 1, characterized in that: A stainless steel anti-backfire wire mesh is provided at the gas outlet of the shell of the catalytic reactor.

3. The aircraft green inerting system with water removal function according to claim 1, characterized in that: The shell of the catalytic reactor comprises a stainless steel layer, an aluminum silicate-filled refractory fiber layer and a stainless steel layer from the inside to the outside.

4. The control method of the aircraft green inerting system with water removal function according to claim 1 is characterized in that: The following procedures are included: When the oxygen concentration sensor senses that the oxygen concentration in the upper space of the fuel tank is higher than the preset oxygen concentration upper limit threshold, the control module synchronously turns on the first blower, the second blower, the electric heater, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, and starts the motor; When the oxygen concentration sensor senses that the oxygen concentration in the upper space of the fuel tank is lower than the preset oxygen concentration lower limit threshold, the control module synchronously turns off the first blower, the second blower, the electric heater, the first electric regulating valve, the second electric regulating valve, the third electric regulating valve, and stops the motor; When the flow sensor detects that the gas flow at the inlet of the electric heater is less than a preset lower flow threshold, the control module increases the opening of the second electric regulating valve according to the preset opening threshold, thereby increasing the amount of supplementary air; when the flow sensor detects that the gas flow at the inlet of the electric heater is greater than a preset upper flow threshold, the control module decreases the opening of the second electric regulating valve according to the preset opening threshold, thereby reducing the amount of supplementary air; When the first temperature sensor detects that the gas temperature at the outlet of the electric heater is lower than a preset first temperature lower limit threshold, the control module increases the heating power of the electric heater according to the preset power threshold; when the first temperature sensor detects that the gas temperature at the outlet of the electric heater is higher than a preset first temperature upper limit threshold, the control module reduces the heating power of the electric heater according to the preset power threshold; When the second temperature sensor detects that the gas temperature at the inlet of the first electric control valve is greater than the preset second temperature upper limit threshold, the control module closes the first electric control valve, cutting off the passage of high-temperature gas into the fuel tank; when the second temperature sensor detects that the gas temperature at the inlet of the first electric control valve is lower than the preset second temperature lower limit threshold, the control module reopens the first electric control valve and restores the normal working process of the system.

Images