Aviation fuel volatile gas recovery condensing device and recovery method thereof

Abstract

The application discloses an aviation oil volatile gas recovery condensing device, and relates to the technical field of volatile gas recovery.The device comprises an oil storage barrel, an integrated fixing module is connected to the top of the inner cavity of the oil storage barrel, and a motor, a gas suction mechanism, a condensing mechanism, a liquid driving conveying mechanism and an oil gas recovery mechanism are installed in the integrated fixing module.The application further discloses a recovery method based on the gas recovery condensing device.The application adopts the vortex tube principle to cool and condense the volatile gas, does not need to additionally configure an electric refrigeration device, reduces the device energy consumption and operation cost, and is compact in structure, free of easily-damaged electric control components and low in failure rate, and is suitable for aviation oil storage and other scenes with high anti-explosion requirements.The device simultaneously drives the gas suction fan blade and the liquid pumping mechanism through the motor, realizes "one source and double driving", and does not need to additionally increase a power source.

Description

Technical Field

[0001] This invention relates to the field of volatile gas recovery, specifically to a condensation device for recovering volatile gases from aviation fuel and its recovery method. Background Technology

[0002] During the storage, transfer, and refueling of aviation fuel, the recovery and treatment of its volatile gases are crucial for ensuring operational safety and improving resource utilization. Currently, existing technologies for treating aviation fuel volatile gases mainly rely on refrigeration equipment to condense and recover the gases. However, such devices generally suffer from high energy consumption, complex structures, and high maintenance costs.

[0003] Specifically, existing condensation devices mostly employ electrically controlled refrigeration modules, requiring continuous electrical energy consumption to maintain the low-temperature environment. In aviation fuel storage scenarios, this not only increases the equipment's operating energy consumption and costs, but also makes the electrical control components prone to failure in humid and vibrating environments, reducing the reliability of the device. Furthermore, the condensation structures of existing devices are mostly straight pipes or simple cavities, resulting in a single flow velocity and direction for the volatile gases, making it difficult to achieve efficient vortex heat transfer. This leads to low condensation efficiency, and some incompletely condensed light component volatile gases can easily escape directly, causing resource waste and environmental pollution.

[0004] Furthermore, existing equipment typically lacks dedicated auxiliary absorption components, resulting in a lack of effective means to capture and treat residual volatile gases after initial condensation. It relies solely on a single condensation process, which fails to meet stringent environmental and recycling standards. Some equipment requires additional independent liquid pump drive systems to improve absorption efficiency, leading to a bulky overall structure, redundant power, increased manufacturing costs and maintenance complexity, and is incompatible with the efficient and compact space utilization requirements of aviation fuel processing facilities.

[0005] Therefore, there is a need to provide a device and method for recovering and condensing volatile gases from aviation fuel, in order to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide an aviation fuel volatile gas recovery and condensation device and its recovery method.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an aviation fuel volatile gas recovery and condensation device, comprising a fuel storage tank, wherein an integrated fixing module is provided at the top of the inner cavity of the fuel storage tank; the integrated fixing module serves as an overall load-bearing unit, and all functional components are installed inside; the integrated fixing module houses a motor, a suction mechanism, a condensation mechanism, a liquid-driven conveying mechanism, and a fuel gas recovery mechanism; the suction mechanism includes fan blades, and the motor is connected to the fan blades via a transmission belt; the condensation mechanism includes a condenser tube, the wall of which is circumferentially... The condenser tube has several inclined holes, which are through holes connecting the outside and inside of the condenser tube. The axis of the inclined holes forms an angle with both the radial and circumferential directions of the condenser tube, so that the gas flows spirally along the outer wall of the condenser tube and then enters the interior of the condenser tube tangentially through the inclined holes to form a vortex. The oil and gas recovery mechanism includes a recovery box, which is connected to the condensate outlet of the condenser tube. The motor simultaneously drives the suction mechanism and the liquid-driven conveying mechanism to draw the volatile gas into the condenser tube for condensation and send the liquefied oil into the recovery box to complete the recovery.

[0008] Preferably, a positioning frame is installed at the bottom of the integrated fixing module, and the fan blade is rotatably connected in the positioning frame; a gas collecting block is also installed and fixed in the integrated fixing module, the gas collecting block is located above the fan blade, and is used to concentrate and guide the volatile gas to the condenser tube area to avoid disorderly diffusion of gas.

[0009] Preferably, a positioning block is installed and fixed inside the integrated fixing module, and a positioning ring is provided inside the positioning block; the condenser tube is coaxially snapped into the positioning ring, so that the gas enters the inclined hole evenly in the circumferential direction and stably forms a swirling heat exchange.

[0010] Preferably, the outer wall of the condenser tube is provided with a gas-blocking plug to prevent gas bypass and short circuit, and to force all gas to enter the condenser tube through the inclined hole to form a vortex cooling.

[0011] Preferably, the hydraulically driven conveying mechanism includes a threaded groove rod with an externally closed helical channel, a positioning post, a T-shaped slider, and a levering block; the output end of the motor is fixedly connected to the threaded groove rod; the levering block is slidably connected in the externally closed helical channel of the threaded groove rod and fixedly connected to the T-shaped slider.

[0012] In a further preferred embodiment, the T-shaped slider is slidably connected to the positioning post, and when the threaded groove rod rotates, it drives the T-shaped slider to perform vertical reciprocating motion through the lever block.

[0013] Preferably, the integrated fixed module also includes a liquid supply box, a first infusion tube, a second infusion tube, and a rotating nozzle; one end of the first infusion tube is connected to the liquid supply box, the other end of the first infusion tube is connected to one end of the second infusion tube, and the other end of the second infusion tube is connected to the rotating nozzle; the first infusion tube and the second infusion tube are slidably connected; both the first infusion tube and the second infusion tube are provided with flow-blocking beads to form a unidirectional pumping structure; the second infusion tube is connected to the liquid-driven delivery mechanism; a mixing chamber is also provided between the condensate outlet of the condenser tube and the recovery box, and the nozzle of the rotating nozzle is located in the mixing chamber.

[0014] Preferably, the condenser tube is arranged at an angle, with the angle between the inclination and the horizontal plane being 0 to 15 degrees; the gas flows spirally along the outer wall of the condenser tube and enters the tube tangentially from the inclined hole to form two swirling flows, and the gas is condensed through the exchange of kinetic energy and pressure.

[0015] On the other hand, the present invention also provides the following technical solution: a method for recovering volatile gases from aviation fuel using a gas recovery and condensation device, wherein the operation method of the gas recovery and condensation device includes the following steps: Step S1: After the motor starts, the motor runs and drives the fan blades to rotate at high speed in the positioning frame through the transmission belt to form a negative pressure. The fan blades continuously draw in the aviation fuel volatile gas generated in the oil storage tank, so that the volatile gas flows upward into the positioning block under the guidance and constraint of the gas collecting block, completing the centralized flow of volatile gas and avoiding disorderly diffusion of gas in the oil storage tank. Step S2: The collected volatile gas flows spirally along the outer wall of the condenser tube and enters the tube tangentially through the inclined holes distributed in a ring in the middle of the condenser tube. Two opposing high-speed airflows are formed inside the tube. The two airflows are rapidly cooled under the action of pressure and kinetic energy exchange, causing the oil components in the gas to be liquefied and form liquid oil droplets, which adhere to the inner wall of the condenser tube and collect downwards, achieving efficient condensation without electric cooling and reducing the overall energy consumption of the device. Step S3: The motor synchronously drives the threaded groove rod to rotate, and the force block makes a cyclical movement along the closed groove of the threaded groove rod. Under the guidance of the positioning column, it drives the T-shaped slider to move vertically back and forth. Together with the flow-blocking beads in the first and second infusion tubes, a one-way pumping structure is formed to continuously pressurize and deliver the high-boiling-point inert absorbent liquid in the supply box to the self-rotating nozzle. Step S4: The absorbent is sprayed out through the inclined nozzle of the rotating nozzle. Driven by the reaction force, the rotating nozzle rotates autonomously, spraying the absorbent upward in the mixing chamber in the form of a spiral mist. It comes into countercurrent contact with the incompletely condensed volatile gas flowing out of the condenser outlet of the condenser tube, which fully dissolves and absorbs the residual oil and gas components, inhibits the secondary volatilization of oil and gas, and improves the overall recovery effect. Step S5: The condensed liquid oil droplets and the absorbent liquid are collected together in the recovery box for temporary storage. They can then be separated, purified and reused in a unified manner. This avoids the leakage of volatile gases and pollution of the environment, and also prevents the backflow of the recovered liquid from affecting the quality of the original oil in the storage tank, thus achieving a safe, environmentally friendly and efficient closed-loop recycling.

[0016] Preferably, in step S3, during the vertical reciprocating motion of the T-shaped slider, the compression and reset work in conjunction with the flow-blocking beads in the first and second infusion tubes to form a unidirectional pump, thereby achieving continuous and stable delivery of the absorbent liquid.

[0017] Preferably, in step S4, the rotating nozzle has an inclined spray hole inside. The inclined spray hole is used to generate a circumferential reaction force in the sprayed liquid, thereby driving the rotating nozzle to rotate autonomously around the second infusion tube, so that the absorbent liquid diffuses upward in a spiral mist.

[0018] The present invention provides an aviation fuel volatile gas recovery and condensation device and recovery method. Compared with the prior art, the advantages of the present invention are: (1) By using the vortex tube principle to cool and condense the volatile gas, there is no need to configure additional electric refrigeration equipment, which reduces the energy consumption and operating cost of the device. It has a compact structure, no easily damaged electrical control components, and a low failure rate, making it suitable for scenarios with high explosion-proof requirements such as aviation fuel storage.

[0019] (2) The device drives the gas suction fan blades and the liquid pumping mechanism simultaneously through the motor, realizing "one source and two drives". No additional power source is required, which improves the integration and energy utilization of the device, simplifies the overall structure and reduces the number of failure points.

[0020] (3) The absorbent sprayed from the self-rotating nozzle is a spiral mist, which can form a larger contact area and come into countercurrent contact with the volatile gas, thereby improving the absorption efficiency of the uncondensed volatile components, effectively reducing the escape rate of the volatile gas, and improving the overall recovery effect.

[0021] (4) The absorbent uses high-boiling-point inert hydrocarbon absorbent oil, which has good compatibility with aviation fuel and can be treated together with the condensed and recovered fuel to reduce secondary pollution. At the same time, it can inhibit the corrosion of the equipment by impurities in the condensate, extend the service life of the equipment, and has both practicality and environmental protection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the overall positional relationship of the device in this invention; Figure 2 This is a cross-sectional view of the overall device in this invention; Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle; Figure 4This is a schematic diagram showing the positional relationship between the positioning block, positioning ring, and condenser tube in this invention; Figure 5 This is a schematic diagram showing the positional relationship between the motor, the threaded groove rod, and the T-shaped slider in this invention; Figure 6 This is a schematic diagram showing the positional relationship between the liquid supply box, the first infusion tube, and the reset spring in this invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B in the middle; Figure 8 For the present invention Figure 6 Enlarged view of the structure at point C.

[0023] Reference numerals: 11. Oil storage tank; 12. Integrated fixing module; 13. Positioning frame; 14. Fan blade; 15. Gas collection block; 16. Positioning block; 17. Positioning ring; 18. Condenser tube; 19. Gas-blocking plug; 20. Mixing chamber; 21. Motor; 22. Transmission belt; 23. Threaded grooved rod; 24. Positioning post; 25. T-shaped slider; 26. Assist block; 27. Liquid supply box; 28. First liquid delivery tube; 29. ​​Return spring; 30. Second liquid delivery tube; 31. Flow-blocking bead; 32. Rotating nozzle; 33. Recovery box. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0025] In the description of this invention, the terms “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] The specific implementation of the present invention will be described in detail below with reference to specific embodiments. Example 1

[0027] like Figures 1 to 8As shown, this embodiment provides an aviation fuel volatile gas recovery and condensation device, including a fuel storage tank 11. An integrated fixing module 12 is snapped onto the top of the inner cavity of the fuel storage tank 11. The integrated fixing module 12 is installed on the top of the fuel storage tank 11 and serves as a support module for all functional components. The integrated fixing module is composed of two symmetrical semi-circular rings joined together and snapped onto the top of the inner cavity of the fuel storage tank. The interlocking structure facilitates the assembly, inspection, disassembly, and replacement of the internal components.

[0028] The integrated fixed module 12 is equipped with a motor 21, an air extraction mechanism, a condensation mechanism, a liquid-driven conveying mechanism, and an oil and gas recovery mechanism. The air extraction mechanism includes a fan blade 14, and the motor 21 is connected to the fan blade 14 via a transmission belt 22. The condensation mechanism includes a condenser tube 18, and the condenser tube 18 has several inclined holes circumferentially opened on its wall. The inclined holes are through holes that connect the outside and inside of the condenser tube 18. The axial direction of the inclined holes forms an angle with both the radial and circumferential directions of the condenser tube 18, so that the gas flows spirally along the outer wall of the condenser tube 18 and then enters the interior of the condenser tube 18 tangentially through the inclined holes to form a vortex. The oil and gas recovery mechanism includes a recovery box 33, which is connected to the condensate outlet of the condenser tube 18.

[0029] The motor 21 simultaneously drives the air extraction mechanism and the hydraulic conveying mechanism to draw the volatile gas into the condenser pipe 18 for condensation, and sends the liquefied oil into the recovery box 33 to complete the recovery.

[0030] In actual operation, after the motor 21 starts, it drives the fan blade 14 to rotate through the transmission belt 22 to form a negative pressure, which draws the volatile gas in the oil storage tank 11 upward. All the volatile gas enters the interior of the condenser tube 18 tangentially through the inclined hole, forming an outer vortex rotating along the tube wall and an inner vortex rotating in the opposite direction along the center. The two vortices undergo intense energy exchange in the tube, which rapidly reduces the temperature of the oil and gas, and liquefies the oil components to form oil droplets. The oil droplets flow downward along the inner wall of the condenser tube 18 by gravity and directly flow into the recovery box 33. There is no upward lifting section throughout the process, and the recovery is smooth and does not accumulate liquid. Example 2

[0031] This embodiment is a preferred solution of Embodiment 1, such as... Figures 1 to 3 As shown, a positioning frame 13 is installed at the bottom of the integrated fixing module 12, and the fan blade 14 is rotatably connected in the positioning frame 13; a gas collecting block 15 is also installed and fixed in the integrated fixing module 12, and the gas collecting block 15 is located above the fan blade 14, which is used to concentrate and guide the volatile gas into the condenser pipe 18.

[0032] In actual operation, the volatile gas is drawn in by the fan blades 14 and is concentrated and constrained as it passes through the gas collecting block 15, and then flows spirally along the outer wall of the inclined condenser tube 18. By concentrating and guiding the volatile gas to the condenser tube area, disorderly gas diffusion can be avoided. Example 3

[0033] This embodiment is a preferred solution of Embodiment 1, such as... Figure 4 As shown, a positioning block 16 is installed and fixed inside the integrated fixing module 12, and a positioning ring 17 is provided inside the positioning block 16; the condenser tube 18 is coaxially snapped into the positioning ring 17.

[0034] In this embodiment, the condenser tube 18 is coaxially fixed in the positioning block 16 by the positioning ring 17, ensuring that the gas enters the inclined hole tangentially from all sides, the swirling flow is stable, and the condensation effect is uniform. Example 4

[0035] This embodiment is a preferred solution of Embodiment 1, such as... Figure 4 As shown, a gas-blocking plug 19 is provided on the outer wall of the condenser tube 18.

[0036] In operation, under the obstruction of the gas-blocking plug 19, all volatile gases cannot bypass the circuit and instead enter the interior of the condenser 18 tangentially through the inclined hole, forming an outer swirling flow rotating along the pipe wall and an inner swirling flow rotating in the opposite direction along the center. The two swirling flows undergo intense energy exchange inside the pipe, causing the oil and gas temperature to drop rapidly, and the oil components to liquefy and form oil droplets. The oil droplets flow downwards along the inner wall of the condenser 18 by gravity and directly flow into the recovery box 33. There is no upward lifting section throughout the process, ensuring smooth recovery without liquid accumulation. Example 5

[0037] This embodiment is a preferred solution of Embodiment 1, such as... Figures 4 to 8 As shown, the hydraulic conveying mechanism includes a threaded groove rod 23 with an external closed spiral channel, a positioning post 24, a T-shaped slider 25, and a lever block 26; the output end of the motor 21 is fixedly connected to the threaded groove rod 23; the lever block 26 is slidably connected in the external closed spiral channel of the threaded groove rod 23, and the lever block 26 is fixedly connected to the T-shaped slider 25; the T-shaped slider 25 is slidably connected to the positioning post 24.

[0038] The integrated fixed module 12 also includes a liquid supply box 27, a first liquid delivery pipe 28, a second liquid delivery pipe 30, and a rotating nozzle 32. One end of the first liquid delivery pipe 28 is connected to the liquid supply box 27, and the other end of the first liquid delivery pipe 28 is connected to one end of the second liquid delivery pipe 30. The other end of the second liquid delivery pipe 30 is connected to the rotating nozzle 32. A mixing chamber 20 is also provided between the condensate outlet of the condenser pipe 18 and the recovery box 33, and the nozzle of the rotating nozzle 32 is located in the mixing chamber 20. The bottom of the mixing chamber 20 has an opening or pipe that is connected to the top inlet of the recovery box 33. The condensed oil and absorbent collected in the mixing chamber 20 flow into the recovery box 33 under the action of gravity.

[0039] The top of the T-shaped slider 25 is fixedly connected to the second infusion tube 30. A sealing ring is provided between the first infusion tube 28 and the second infusion tube 30 to achieve a sliding seal.

[0040] Both the first infusion tube 28 and the second infusion tube 30 have flow-blocking beads 31 installed at their inner tops. The flow-blocking beads 31 form one-way inlet and one-way outlet structures, respectively, together constituting a pump-like mechanism similar to a water well. Specifically, the first infusion tube 28 has a constriction inside, and the flow-blocking beads 31 are movably placed inside the constriction, forming a one-way valve that only allows liquid to flow from the supply box 27 to the first infusion tube 28; the second infusion tube 30 also has a constriction inside, and the flow-blocking beads 31 are movably placed inside the constriction, forming a one-way valve that only allows liquid to flow from the first infusion tube 28 to the second infusion tube 30. When the T-shaped slider 25 moves the second infusion tube 30 upward, the volume of the inner cavity of the second infusion tube 30 increases, the flow-blocking bead 31 in the first infusion tube 28 opens, and the flow-blocking bead 31 in the second infusion tube 30 closes, so that liquid is drawn from the supply box 27 into the first infusion tube 28; when the T-shaped slider 25 moves downward, the volume of the inner cavity of the second infusion tube 30 decreases, the flow-blocking bead 31 in the first infusion tube 28 closes, and the flow-blocking bead 31 in the second infusion tube 30 opens, so that liquid is pressed from the first infusion tube 28 into the rotating nozzle 32 in the second infusion tube 30.

[0041] The top of the second infusion tube 30 is rotatably connected to a self-rotating nozzle 32. The self-rotating nozzle 32 has an inclined spray hole inside. When the liquid is sprayed out, the reaction force can drive the self-rotating nozzle 32 to rotate autonomously, so that the sprayed liquid is distributed in a spiral mist.

[0042] In operation, motor 21 drives fan blade 14 to rotate while simultaneously rotating threaded groove rod 23. The lever block 26 circulates within the external spiral groove of threaded groove rod 23, causing T-shaped slider 25 to reciprocate vertically along positioning post 24. This, combined with the flow-blocking beads 31 in the first and second infusion pipes 28 and 30, forms a unidirectional pumping structure, stably delivering the absorbent liquid from supply box 27 to rotating nozzle 32. Rotating nozzle 32 rotates autonomously due to the reaction force of the liquid jet, spraying the absorbent liquid upwards in a mist form within mixing chamber 20. This mist fully contacts the uncondensed oil and gas flowing from condensate outlet of condenser pipe 18, achieving deep absorption. The absorbent liquid and condensate ultimately converge into recovery box 33, achieving safe, environmentally friendly, and efficient closed-loop recycling.

[0043] In this embodiment, preferably, a return spring 29 is sleeved on the outer wall of the first infusion tube 28. The return spring 29 is located between the T-shaped slider 25 and the infusion box 27. The return spring 29 is only used to provide a buffering effect and does not affect the normal reciprocating motion of the T-shaped slider 25. Example 6

[0044] This embodiment discloses a method for recovering volatile gases from aviation fuel using a gas recovery and condensation device. The recovery method includes the following steps: Step S1: After the motor 21 is started, the motor 21 runs and drives the fan blade 14 to rotate at high speed in the positioning frame 13 through the transmission belt 22 to form a negative pressure. The fan blade 14 continuously draws in the aviation fuel volatile gas generated in the oil storage tank 11, so that the volatile gas flows upward into the positioning block 16 under the guidance and constraint of the gas collecting block 15, completing the centralized flow of volatile gas and avoiding disorderly diffusion of gas in the oil storage tank 11. Step S2: The collected volatile gas flows spirally along the outer wall of the condenser tube 18 and enters the tube tangentially through the inclined holes distributed in a ring in the middle of the condenser tube 18. Two opposing high-speed airflows are formed inside the tube. The two airflows are rapidly cooled under the action of pressure and kinetic energy exchange, causing the oil components in the gas to be liquefied and form liquid oil droplets, which adhere to the inner wall of the condenser tube 18 and collect downwards, realizing efficient condensation without electric cooling and reducing the overall energy consumption of the device. Step S3: Motor 21 synchronously drives the threaded groove rod 23 to rotate, and the lever block 26 makes a cyclical movement along the closed groove of the threaded groove rod 23. Under the guidance of the positioning column 24, it drives the T-shaped slider 25 to move vertically back and forth. Together with the flow-blocking beads 31 in the first infusion tube 28 and the second infusion tube 30, a one-way pumping structure is formed to continuously pressurize and deliver the high-boiling-point inert absorbent liquid in the liquid supply box 27 to the self-rotating nozzle 32. Step S4: The absorbent is sprayed out through the inclined nozzle of the rotating nozzle 32. Driven by the reaction force, the rotating nozzle 32 rotates autonomously, spraying the absorbent in the mixing chamber (20) in a spiral mist form. It comes into countercurrent contact with the incompletely condensed volatile gas flowing out of the condensate outlet of the condenser tube 18, fully dissolving and absorbing the residual oil and gas components, inhibiting the secondary volatilization of oil and gas, and improving the overall recovery effect. Step S5: The condensed liquid oil droplets and the absorbent liquid flow together into the recovery box 33 for temporary storage. They can then be separated, purified and reused in a unified manner. This avoids the leakage of volatile gases and pollution of the environment, and also prevents the backflow of the recovered liquid from affecting the quality of the original oil in the oil storage tank 11, thus achieving a safe, environmentally friendly and efficient closed-loop recycling.

[0045] Based on the above embodiments, a general embodiment encompassing all the embodiments can be formed, and its working process and working principle are as follows: Gas collection and centralized diversion steps: After the device is started, the motor 21 operates, and its top output shaft drives the fan blade 14 to rotate at high speed within the positioning frame 13 via the transmission belt 22, thereby drawing and collecting the volatile gases from the aviation fuel inside the oil storage tank 11. Under the guiding and constraining effect of the gas collecting block 15, the volatile gases drawn by the fan blade 14 are concentrated and guided into the positioning block 16 within the integrated fixed module 12, ensuring that the volatile gases flow to the condensation area along a predetermined path, preventing disorderly diffusion and bypass leakage. Through centralized flow guidance and path constraint, it is ensured that all volatile gases enter the condensation process, improving gas collection efficiency and subsequent condensation effect.

[0046] Vortex condensation cooling steps: The volatile gas, guided by a centralized flow, spirals circumferentially along the outer wall of the inclined condenser tube 18. Blocked by the gas-blocking plug 19, it all enters the condenser tube 18 tangentially through the inclined holes, forming an outer swirling flow rotating along the tube wall and an inner swirling flow rotating in the opposite direction along the center. The two swirling flows undergo intense energy and pressure exchange within the tube, causing a rapid decrease in gas temperature. The oil and gas components liquefy upon cooling, forming oil droplets that collect downwards along the tube wall. This method achieves efficient cooling and condensation without the need for electric refrigeration, resulting in low energy consumption, high explosion-proof safety, and making it particularly suitable for aviation fuel operation environments.

[0047] Gravity-based recovery steps: The condensed liquid oil droplets slide smoothly down the inner wall of the condenser tube 18 under their own gravity, without any lifting section or liquid accumulation obstruction, and flow directly into the recovery box 33 for temporary storage. There will be no backflow, blockage or leakage. The gravity-flow recovery is smoother, without oil accumulation or gas leakage, with higher recovery efficiency and more stable operation of the device.

[0048] Synchronous pumping spray absorption steps: Motor 21 synchronously drives the threaded groove rod 23 to rotate, and the lever block 26 circulates along the external spiral channel. Guided by the positioning column 24, it drives the T-shaped slider 25 to perform vertical reciprocating motion. Together with the flow-blocking bead 31 in the infusion tube, it forms a unidirectional pumping structure, stably delivering the absorbent liquid in the supply box 27 to the rotating nozzle 32. The rotating nozzle 32 rotates autonomously by the jet reaction force, spraying the absorbent liquid upward in a spiral mist form, which comes into countercurrent contact with the incompletely condensed volatile gas. A single motor simultaneously drives the air extraction and pumping, achieving dual-drive from a single source, resulting in a simpler structure, lower energy consumption, and a lower failure rate.

[0049] Deep oil and gas purification and recovery steps: The mist-like absorbent comes into full contact with the residual volatile gases, completely dissolving and absorbing the uncondensed oil and gas components, inhibiting secondary volatilization. Finally, the absorbent and condensed oil flow together into the recovery box 33, achieving unified collection, separation and reuse. With dual recovery of condensation and absorption, the oil and gas escape rate is extremely low, the environmental protection is stronger, and the oil recovery rate is higher.

[0050] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and are included within the scope of the invention as described in the claims and its equivalents.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for recovering and condensing volatile gases from aviation fuel, comprising a fuel storage tank (11), characterized in that: An integrated fixing module (12) is provided at the top of the inner cavity of the oil storage tank (11); the integrated fixing module (12) is equipped with a motor (21), a vacuuming mechanism, a condensing mechanism, a liquid-driven conveying mechanism and an oil and gas recovery mechanism. The air extraction mechanism includes a fan blade (14), and the motor (21) is connected to the fan blade (14) via a transmission belt (22); The condensation mechanism includes a condenser tube (18), and the condenser tube (18) has several inclined holes circumferentially opened on its tube wall. The inclined holes are through holes that connect the outside and inside of the condenser tube (18). The axial direction of the inclined holes forms an angle with both the radial and circumferential directions of the condenser tube (18), so that the gas flows spirally along the outer wall of the condenser tube (18) and then enters the interior of the condenser tube (18) tangentially through the inclined holes to form a vortex. The oil and gas recovery mechanism includes a recovery box (33), which is connected to the condensate outlet of the condenser pipe (18); The motor (21) simultaneously drives the air extraction mechanism and the liquid-driven conveying mechanism to draw the volatile gas into the condenser pipe (18) for condensation, and sends the liquefied oil into the recovery box (33) to complete the recovery.

2. The aviation fuel volatile gas recovery and condensation device according to claim 1, characterized in that: The bottom of the integrated fixing module (12) is equipped with a positioning frame (13), and the fan blade (14) is rotatably connected inside the positioning frame (13); The integrated fixed module (12) is also equipped with a gas collecting block (15), which is located above the fan blade (14) and is used to concentrate and guide the volatile gas into the condenser (18).

3. The aviation fuel volatile gas recovery and condensation device according to claim 1, characterized in that: The integrated fixing module (12) is equipped with a positioning block (16), and a positioning ring (17) is provided inside the positioning block (16); the condenser tube (18) is coaxially snapped into the positioning ring (17).

4. The aviation fuel volatile gas recovery and condensation device according to claim 1, characterized in that: The outer wall of the condenser tube (18) is provided with a gas-blocking plug (19).

5. The aviation fuel volatile gas recovery and condensation device according to claim 1, characterized in that: The hydraulic conveying mechanism includes a threaded groove rod (23) with an external closed spiral channel, a positioning column (24), a T-shaped slider (25), and a lever block (26); the output end of the motor (21) is fixedly connected to the threaded groove rod (23); the lever block (26) is slidably connected in the external closed spiral channel of the threaded groove rod (23), and the lever block (26) is fixedly connected to the T-shaped slider (25).

6. The aviation fuel volatile gas recovery and condensation device according to claim 5, characterized in that: The T-shaped slider (25) is slidably connected to the positioning post (24).

7. The aviation fuel volatile gas recovery and condensation device according to claim 1, characterized in that: The integrated fixed module (12) is also equipped with a liquid supply box (27), a first infusion tube (28), a second infusion tube (30), and a rotating nozzle (32); one end of the first infusion tube (28) is connected to the liquid supply box (27), the other end of the first infusion tube (28) is connected to one end of the second infusion tube (30), and the other end of the second infusion tube (30) is connected to the rotating nozzle (32); The first infusion tube (28) and the second infusion tube (30) are slidably connected; Both the first infusion tube (28) and the second infusion tube (30) are provided with flow-blocking beads (31); The second infusion tube (30) is connected to the liquid-driven delivery mechanism; A mixing chamber (20) is provided between the condensate outlet of the condenser tube (18) and the recovery box (33), and the nozzle of the self-rotating nozzle (32) is located in the mixing chamber (20).

8. A method for recovering volatile gases from aviation fuel using a condensation and recovery device, characterized in that, The aviation fuel volatile gas recovery and condensation device as described in any one of claims 1 to 7, wherein the recovery method of the gas recovery and condensation device includes the following steps: Step S1: After the motor (21) starts, the motor (21) runs and drives the fan blade (14) to rotate in the positioning frame (13) through the transmission belt (22) to form a negative pressure. The fan blade (14) continuously draws in the aviation fuel volatile gas generated in the oil storage tank (11), so that the volatile gas flows upward into the positioning block (16) under the guidance and constraint of the gas collecting block (15), thus completing the centralized flow of volatile gas. Step S2: The collected volatile gas flows spirally along the outer wall of the condenser tube (18) and enters the tube tangentially through the inclined holes distributed in the middle of the condenser tube (18). Two opposing high-speed airflows are formed inside the tube. The two airflows are rapidly cooled under the action of pressure and kinetic energy exchange, causing the oil components in the gas to be liquefied and form liquid oil droplets, which adhere to the inner wall of the condenser tube (18) and collect downwards, realizing efficient condensation without electric cooling and reducing the overall energy consumption of the device. Step S3: The motor (21) synchronously drives the threaded groove rod (23) to rotate, and the lever block (26) makes a cyclical motion along the closed channel of the threaded groove rod (23). Under the guidance of the positioning column (24), it drives the T-shaped slider (25) to move vertically back and forth. Together with the flow-blocking beads (31) in the first infusion tube (28) and the second infusion tube (30), a one-way pumping structure is formed to continuously pressurize and deliver the high-boiling-point inert absorbent liquid in the liquid supply box (27) to the self-rotating nozzle (32). Step S4: The absorbent is sprayed out through the inclined nozzle of the rotating nozzle (32). Driven by the reaction force, the rotating nozzle (32) rotates autonomously, spraying the absorbent in the mixing chamber (20) in a spiral mist form. It comes into countercurrent contact with the incompletely condensed volatile gas flowing out of the condensate outlet of the condenser tube 18, fully dissolving and absorbing the residual oil and gas components, inhibiting the secondary volatilization of oil and gas, and improving the overall recovery effect. Step S5: The condensed liquid oil droplets and the absorbent are temporarily stored together in the recovery box (33).

9. The recovery method of the aviation fuel volatile gas recovery and condensation device according to claim 8, characterized in that, In step S3, during the vertical reciprocating motion, the T-shaped slider (25) forms a unidirectional pump by squeezing and resetting the flow-blocking beads (31) in the first infusion tube (28) and the second infusion tube (30), thereby achieving continuous and stable delivery of the absorbent liquid.

10. The method for recovering volatile gases from aviation fuel using a condensation device according to claim 8, characterized in that, In step S4, the rotating nozzle (32) has an inclined nozzle hole inside. The inclined nozzle hole is used to generate a circumferential reaction force for the sprayed liquid, thereby driving the rotating nozzle (32) to rotate autonomously around the second infusion pipe (30), so that the absorbent liquid diffuses upward in a spiral mist.

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