Volatile organic compound filtering and discharging system of airport oil depot

Abstract

The volatile organic compound filtering and discharging system comprises an oil storage tank, an exhaust fan and an activated carbon filter cartridge, a condenser is arranged at the top end of the oil storage tank, an air exhaust channel is arranged below the condenser and communicated with the condenser, a communicating pipe is connected between the bottom end of the air exhaust channel and the oil storage tank, and the activated carbon filter cartridge is arranged in the communicating pipe. The exhaust fan is fixed to one side of the oil storage tank, an air inlet of the exhaust fan communicates with the air exhaust channel, and a connecting cover is fixed to an air outlet of the exhaust fan. A rotary movable pipe is arranged between the activated carbon filter cartridge and the exhaust fan, a discharge port is formed in the inner wall of the rotary movable pipe, and activated carbon, close to the air inlet end (the side of the exhaust fan), of the movable pipe makes contact with high-concentration VOCs firstly, so that the adsorption saturation gradient is formed. Saturated activated carbon can be quickly discharged only by regularly rotating the movable pipe to enable the discharge port to face downwards, the whole filter cartridge does not need to be disassembled, and the replacement efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of organic matter filtration and emission technology, and more particularly to a volatile organic compound filtration and emission system for an airport oil depot. Background Technology

[0002] With the rapid development of the air transport industry, aviation fuel stored in airport fuel depots generates a large amount of volatile organic compounds (VOCs) during storage. Direct emission of these VOCs not only wastes resources but also harms the atmospheric environment and human health. Existing airport fuel depot VOCs treatment systems generally suffer from the following problems: 1. Traditional condensation devices have limited effectiveness in pretreating volatile gases in oil storage tanks, resulting in a high load on subsequent activated carbon filtration and a rapid decline in adsorption efficiency. 2. Once the activated carbon is saturated, it needs to be replaced as a whole, which is time-consuming and labor-intensive. In addition, the unsaturated activated carbon is replaced along with it, resulting in a waste of resources. Some systems lack convenient unloading and packing structures, resulting in high maintenance costs. 3. Loose or unevenly distributed activated carbon packing can easily lead to gas short-circuiting, affecting the filtration effect; lack of gradient management of adsorption saturation state makes it impossible to accurately replace activated carbon in high-load areas. 4. The manual operation involves many steps, making it difficult to automate functions such as activated carbon replacement and baffle adjustment, resulting in low operation and maintenance efficiency. Therefore, there is an urgent need for a highly efficient, energy-saving, easy-to-maintain, and activated carbon gradient replacement volatile organic compound filtration and emission system to meet the needs of airport oil depots for environmental protection emissions and intelligent management. Summary of the Invention

[0003] To address the problems mentioned in the background section, this invention provides a volatile organic compound (VOC) filtration and emission system for airport oil depots.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A volatile organic compound (VOC) filtration and emission system for an airport oil depot includes an oil storage tank, an exhaust fan, and an activated carbon filter cartridge. The oil storage tank has a condenser at its top and an exhaust channel below it, which is connected to the condenser. A connecting pipe connects the bottom of the exhaust channel to the oil storage tank. The exhaust fan is fixed to one side of the oil storage tank, and its inlet is connected to the exhaust channel. A connecting cover is fixed to the exhaust fan's outlet. A movable pipe is rotatably installed between the activated carbon filter cartridge and the connecting cover, with a discharge port on the movable pipe. A feeding port is located at the top of the activated carbon filter cartridge. A movable baffle is movably installed on the side of the activated carbon filter cartridge away from the oil storage tank, with an exhaust hole on the movable baffle.

[0005] Preferably, the connecting pipes are provided in multiple ways, and the multiple connecting pipes are horizontally and equidistantly distributed. The condenser is provided with a cooling jacket, and the cooling jacket is provided with a refrigerant inlet and a refrigerant outlet.

[0006] Preferably, a rotating wheel is fixed on the outside of the movable tube near the oil storage tank, and an upgrading crossbar is installed on the top of the activated carbon filter cartridge via a telescopic guide rod. An arc-shaped baffle is fixed at the bottom of the upgrading crossbar directly above the movable tube, and the arc-shaped baffle corresponds to and matches the discharge port.

[0007] Preferably, the rotor has a first limiting arc groove and a second limiting arc groove on the side near the activated carbon filter cylinder. The first limiting arc groove and the second limiting arc groove are smoothly connected, and the arc diameter of the first limiting arc groove is smaller than the arc diameter of the second limiting arc groove.

[0008] Preferably, the side of the rotor away from the activated carbon filter cartridge is provided with two positioning sleeves, and a push rod motor is fixed on the outer casing of the exhaust fan. The output shaft of the push rod motor is fixed with a positioning pin, and the positioning pin is matched with the positioning sleeve.

[0009] Preferably, an installation groove is provided on one side of the activated carbon filter cartridge, and a discharge baffle is detachably installed in the installation groove.

[0010] Preferably, a horizontal drive box is fixed to the bottom of the oil storage tank, and a vertical connecting bar is fixed to the output end of the horizontal drive box. The vertical connecting bar is fixed to the movable baffle through a first horizontal connecting rod.

[0011] Preferably, a threaded rod is rotatably mounted inside the horizontal drive box. The threaded rod is driven to rotate by a rotary motor. A horizontal drive plate is installed on the external thread of the threaded rod. A second horizontal connecting rod is fixed on one side of the horizontal drive plate. The end of the second horizontal connecting rod away from the horizontal drive plate extends to the outside of the horizontal drive box through a guide hole and is fixed to the vertical connecting strip.

[0012] Preferably, a scraper is fixed on the side of the connecting cover near the movable tube, and the blade of the scraper contacts the inner wall of the movable tube.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. The condenser at the top of the oil storage tank is connected to the inside of the tank through multiple horizontally and equally spaced connecting pipes. In conjunction with the refrigerant circulation of the external cooling jacket, it achieves large-area contact condensation of volatile gases, liquefies high-boiling-point organic matter in advance and returns it to the oil storage tank, significantly reducing the amount of gas that the activated carbon needs to process and extending the service life of the activated carbon.

[0014] 2. A rotating movable tube is installed between the activated carbon filter cartridge and the exhaust fan. A discharge port is opened on the inner wall of the tube, and the activated carbon closest to the air inlet (exhaust fan side) of the movable tube first contacts the high-concentration VOCs, forming an adsorption saturation gradient. Saturated activated carbon can be quickly discharged simply by periodically rotating the movable tube to direct the discharge port downwards, without needing to disassemble the entire filter cartridge, effectively improving replacement efficiency.

[0015] 3. The external rotating wheel of the movable tube is equipped with limiting arc-shaped grooves of different diameters, which, together with the top arc-shaped baffle, realize the automatic sealing and opening of the discharge port. When the discharge port is facing upward, the arc-shaped baffle fits tightly against the tube body to prevent air leakage; when rotated to other positions, the baffle automatically separates to reduce resistance, balancing sealing performance and ease of operation.

[0016] 4. The horizontal drive box at the bottom of the oil storage tank drives the moving baffle to move horizontally through the threaded rod and the rotary motor. This pushes the unsaturated activated carbon in the filter cartridge toward the moving tube. After filling the cavity of the moving tube, new carbon is added through the feeding port, forming a gradient filling mode of "old carbon moving forward - new carbon being added". This ensures that the activated carbon is always tightly distributed and avoids gas short circuits.

[0017] 5. The scraper inside the connecting cover contacts the inner wall of the movable tube. When rotating, it simultaneously removes the residual activated carbon particles on the tube wall to ensure thorough unloading and avoid residue affecting the adsorption effect next time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a first-view perspective perspective view of the activated carbon filter cartridge of the present invention; Figure 4 This is a second-view perspective perspective view of the activated carbon filter cartridge of the present invention; Figure 5 This is a front-view sectional view of the activated carbon filter cartridge of the present invention; Figure 6 This is a three-dimensional cross-sectional view of the activated carbon filter cartridge of the present invention; Figure 7 This is a schematic diagram of the active tube structure of the present invention; Figure 8 This is a front-view sectional view of the horizontal drive box of the present invention; In the diagram: 1. Oil storage tank; 2. Exhaust channel; 201. Connecting pipe; 3. Condenser; 301. Cooling jacket; 302. Refrigerant inlet; 303. Refrigerant outlet; 4. Exhaust fan; 401. Connecting cover; 402. Push rod motor; 403. Positioning pin; 404. Positioning sleeve; 405. Scraper; 5. Activated carbon filter cartridge; 501. Movable pipe; 5011. Feed port; 5012. Rotary wheel; 5013. First Limiting arc groove; 5014, second limiting arc groove; 502, feeding port; 503, telescopic guide rod; 504, upgrading crossbar; 505, arc baffle; 506, limiting rod; 6, horizontal drive box; 601, threaded rod; 602, rotary motor; 603, horizontal drive plate; 604, second horizontal connecting rod; 7, vertical connecting bar; 701, first horizontal connecting rod; 702, moving baffle; 8, unloading baffle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1

[0022] Reference Figure 1-8 A volatile organic compound filtration and emission system for an airport oil depot includes an oil storage tank 1, an exhaust fan 4, and an activated carbon filter cartridge 5. A condenser 3 is installed at the top of the oil storage tank 1. Multiple connecting pipes 201 are provided, and the multiple connecting pipes 201 are horizontally and equidistantly distributed. A cooling jacket 301 is provided on the outside of the condenser 3. A refrigerant inlet 302 and a refrigerant outlet 303 are respectively provided on the cooling jacket 301. A suction channel 2 is provided below the condenser 3, and the suction channel 2 is connected to the condenser 3. A connecting pipe 201 is connected between the bottom end of the suction channel 2 and the oil storage tank 1. The exhaust fan 4 is fixed on one side of the oil storage tank 1, and the air inlet of the exhaust fan 4 is connected to the suction channel 2. A connecting cover 401 is fixed to the air outlet of the exhaust fan 4. A movable pipe 501 is rotatably installed between the activated carbon filter cartridge 5 and the connecting cover 401. A discharge port 5011 is opened on the movable pipe 501. A feeding port 502 is provided at the top of the activated carbon filter cartridge 5. A movable baffle 702 is movably installed on the side of the activated carbon filter cartridge 5 away from the oil storage tank 1. An air outlet is opened on the movable baffle 702. The volatile gas in the oil storage tank 1 enters the condenser 3 through the connecting pipe 201 and the exhaust channel 2. It is cooled and condensed in the condenser 3 and flows back into the oil storage tank 1. The gas pressure in the oil storage tank 1 is monitored in real time by a barometer. When the gas pressure reaches the threshold, the exhaust fan 4 is turned on to extract the volatile gas. The volatile gas enters the activated carbon filter cartridge 5 and the movable pipe 501. Both the movable pipe 501 and the activated carbon filter cartridge 5 are filled with activated carbon particles, which can filter and adsorb the gas, filtering out the organic particles in the gas. After the filtration and adsorption treatment, the exhaust gas is discharged from the exhaust hole on the movable baffle 702. After treating the exhaust gas for a period of time, some activated carbon particles become saturated and need to be replaced. Since the movable tube 501 is close to the air inlet, the exhaust gas comes into contact with the activated carbon particles inside the movable tube 501 first. Therefore, the activated carbon inside the movable tube 501 becomes saturated first, and the activated carbon further away from the air inlet has higher adsorption activity. Therefore, it is only necessary to replace the activated carbon inside the movable tube 501 periodically, without replacing all of them, which can improve the replacement efficiency. Simply rotate the movable tube 501 so that the discharge port 5011 faces downwards to discharge the activated carbon particles inside the movable tube 501. After discharge, the remaining activated carbon particles can be moved towards the movable tube 501 by moving the movable baffle 702, thereby filling the movable tube 501. Then, the movable baffle 702 moves in the opposite direction to reset, and new activated carbon particles can be added through the feeding port 502. The adsorption saturation gradient of the activated carbon particles can always be maintained to ensure that the part that needs to be replaced next is the part that needs to be replaced the most.

[0023] Example 2

[0024] Reference Figure 1-8 The difference between this embodiment and embodiment 1 is that a rotating wheel 5012 is fixed on the side of the movable tube 501 near the oil storage tank 1. An upgrading crossbar 504 is installed on the top of the activated carbon filter cylinder 5 through a telescopic guide rod 503. An arc-shaped baffle 505 is fixed at the bottom of the upgrading crossbar 504 directly above the movable tube 501. The arc-shaped baffle 505 corresponds to and matches the discharge port 5011. A first limiting arc groove 5013 and a second limiting arc groove 5014 are opened on the side of the rotating wheel 5012 near the activated carbon filter cylinder 5. The first limiting arc groove 5013 and the second limiting arc groove 5014 are smoothly connected. The arc diameter of the first limiting arc groove 5013 is smaller than the arc diameter of the second limiting arc groove 5014. A limiting rod 506 is fixed at one end of the upgrading crossbar 504. The limiting rod 506 extends into the second limiting arc groove 5014. The movable tube 501 can be manually rotated via the rotating wheel 5012. When the movable tube 501 rotates to the point where the discharge port 5011 faces upward, the arc-shaped baffle 505 can precisely block the discharge port 5011. During the rotation of the rotating wheel 5012, when the limiting rod 506 is engaged in the second limiting arc-shaped groove 5014, the arc-shaped baffle 505 moves away from the movable tube 501. When the limiting rod 506 is engaged in the first limiting arc-shaped groove 5013, the arc-shaped baffle 505 moves closer to the movable tube 501, and the arc-shaped baffle 505 and the movable tube 501 are closely aligned. The outer wall of the tube 501 is in close contact, so the arc-shaped baffle 505 will only press against the outer wall of the movable tube 501 to block the discharge port 5011 when the discharge port 5011 is rotated to the upward position and needs to be blocked. When the discharge port 5011 is rotated to other positions, the arc-shaped baffle 505 will separate from the movable tube 501 through linkage, thereby reducing the resistance during rotation and making the state switching easier while ensuring the sealing effect of the discharge port 5011.

[0025] Two positioning sleeves 404 are provided on the side of the rotating wheel 5012 away from the activated carbon filter cartridge 5. A push rod motor 402 is fixed on the outer shell of the exhaust fan 4. A positioning pin 403 is fixed on the output shaft of the push rod motor 402. The positioning pin 403 corresponds to and matches the positioning sleeve 404. By extending the push rod motor 402, the positioning pin 403 is pushed into the different positioning sleeves 404, which can achieve the locking effect of the position of the movable tube 501.

[0026] The activated carbon filter cartridge 5 has an installation groove on one side, and a discharge baffle 8 can be detachably installed in the installation groove. When discharging the material inside the movable pipe 501, the discharge baffle 8 can be installed to block the activated carbon particles in the activated carbon filter cartridge 5 and prevent the discharge of too many activated carbon particles.

[0027] Example 3

[0028] Reference Figure 1-8The difference between this embodiment and embodiment 2 is that a horizontal drive box 6 is fixed to the bottom of the oil storage tank 1, and a vertical connecting bar 7 is fixed to the output end of the horizontal drive box 6. The vertical connecting bar 7 is fixed to the moving baffle 702 via a first horizontal connecting rod 701. A threaded rod 601 is rotatably installed inside the horizontal drive box 6. The threaded rod 601 is driven to rotate by a rotary motor 602. A horizontal drive plate 603 is installed on the external thread of the threaded rod 601. A second horizontal connecting rod 604 is fixed to one side of the horizontal drive plate 603. The end of the second horizontal connecting rod 604 away from the horizontal drive plate 603 extends to the outside of the horizontal drive box 6 through a guide hole and is fixed to the vertical connecting bar 7. The rotary motor 602 can drive the threaded rod 601 to rotate, which in turn can drive the horizontal drive plate 603 to move horizontally, thereby driving the moving baffle 702 to move horizontally. The movement of the moving baffle 702 can push and compress activated carbon particles into the movable tube 501, ensuring the filtration and adsorption effect.

[0029] Among them, a scraper 405 is fixed on the side of the connecting cover 401 near the movable tube 501. The blade of the scraper 405 contacts the inner wall of the movable tube 501. When the movable tube 501 rotates, the scraper 405 can scrape the inner wall of the movable tube 501 to ensure more complete discharge of activated carbon particles and prevent activated carbon particles from sticking to the inner wall of the movable tube 501, resulting in incomplete discharge.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A volatile organic compound (VOC) filtration and emission system for an airport oil depot, comprising an oil storage tank (1), an exhaust fan (4), and an activated carbon filter cartridge (5), characterized in that: The top of the oil storage tank (1) is provided with a condenser (3), and the bottom of the condenser (3) is provided with an exhaust channel (2). The exhaust channel (2) is connected to the condenser (3). The bottom of the exhaust channel (2) is connected to the oil storage tank (1) by a connecting pipe (201). The exhaust fan (4) is fixed on one side of the oil storage tank (1), and the air inlet of the exhaust fan (4) is connected to the exhaust channel (2). The air outlet of the exhaust fan (4) is fixed with a connecting cover (401). The activated carbon filter cylinder (5) is rotatably installed between the connecting cover (401). The movable pipe (501) is provided with a discharge port (5011) on the movable pipe (501). The top of the activated carbon filter cylinder (5) is provided with a feeding port (502). The side of the activated carbon filter cylinder (5) away from the oil storage tank (1) is movably installed with a movable baffle (702). The movable baffle (702) is provided with an air outlet.

2. The volatile organic compound filtration and emission system for an airport oil depot according to claim 1, characterized in that: The connecting pipe (201) is provided with multiple pipes, and the multiple connecting pipes (201) are horizontally and equidistantly distributed. The condenser (3) is provided with a cooling jacket (301) on the outside, and the cooling jacket (301) is provided with a refrigerant inlet (302) and a refrigerant outlet (303).

3. The volatile organic compound filtration and emission system for an airport oil depot according to claim 1, characterized in that: A rotating wheel (5012) is fixed on the outside of the movable tube (501) near the oil storage tank (1). An upgrading crossbar (504) is installed on the top of the activated carbon filter cylinder (5) through a telescopic guide rod (503). An arc-shaped baffle (505) is fixed at the bottom of the upgrading crossbar (504) directly above the movable tube (501). The arc-shaped baffle (505) corresponds to and matches the discharge port (5011).

4. The volatile organic compound filtration and emission system for an airport oil depot according to claim 3, characterized in that: The rotating wheel (5012) has a first limiting arc groove (5013) and a second limiting arc groove (5014) on the side near the activated carbon filter cylinder (5). The first limiting arc groove (5013) and the second limiting arc groove (5014) are smoothly connected, and the arc diameter of the first limiting arc groove (5013) is smaller than the arc diameter of the second limiting arc groove (5014).

5. The volatile organic compound filtration and emission system for an airport oil depot according to claim 4, characterized in that: Two positioning sleeves (404) are provided on the side of the rotating wheel (5012) away from the activated carbon filter cartridge (5). A push rod motor (402) is fixed on the outer shell of the exhaust fan (4). A positioning pin (403) is fixed on the output shaft of the push rod motor (402). The positioning pin (403) and the positioning sleeve (404) are matched accordingly.

6. The volatile organic compound filtration and emission system for an airport oil depot according to claim 1, characterized in that: An installation groove is provided on one side of the activated carbon filter cartridge (5), and a discharge baffle (8) can be detachably installed in the installation groove.

7. The volatile organic compound filtration and emission system for an airport oil depot according to claim 1, characterized in that: The bottom of the oil storage tank (1) is fixed with a horizontal drive box (6), and the output end of the horizontal drive box (6) is fixed with a vertical connecting bar (7). The vertical connecting bar (7) is fixed to the movable baffle (702) through the first horizontal connecting rod (701).

8. The volatile organic compound filtration and emission system for an airport oil depot according to claim 7, characterized in that: The horizontal drive box (6) is internally mounted with a threaded rod (601), which is driven to rotate by a rotary motor (602). The threaded rod (601) is externally threaded with a horizontal drive plate (603). A second horizontal connecting rod (604) is fixed on one side of the horizontal drive plate (603). The end of the second horizontal connecting rod (604) away from the horizontal drive plate (603) extends to the outside of the horizontal drive box (6) through a guide hole and is fixed with a vertical connecting bar (7).

9. The volatile organic compound filtration and emission system for an airport oil depot according to claim 1, characterized in that: A scraper (405) is fixed on the side of the connecting cover (401) near the movable tube (501), and the blade of the scraper (405) contacts the inner wall of the movable tube (501).

Images