Crude oil storage tank flash vapor containment recovery system

Abstract

The utility model discloses crude oil storage tank flashing airtight recovery system relates to flashing airtight recovery technical field, this crude oil storage tank flashing airtight recovery system, including filter pipe and two transmission pipes, two transmission pipes set up in the left and right sides of filter pipe, two transmission pipes with the inside of filter pipe is open and shut, the inside of filter pipe is provided with filter box, filter box with the inside of filter pipe is open and shut, the inner wall fixedly connected with filter screen of filter box, be provided with guide bearing on filter screen, the inner wall fixedly connected with fixed link of filter box, the end fixedly connected with first installation frame of fixed link, the inner wall fixedly connected with film of first installation frame, the right side fixedly connected with stress disc of film, can utilize the pressure of flashing gas transmission when and cooperate film, stress disc and displacement rod to filter screen cleaning, overall cleaning process does not need external force drive, saves the energy and can prolong the use time of filter screen.

Description

Technical Field

[0001] This utility model relates to the field of closed-loop flash vapor recovery technology, and in particular to a closed-loop flash vapor recovery system for crude oil storage tanks. Background Technology

[0002] During crude oil storage, pressure fluctuations within the storage tank due to diurnal temperature variations, feeding, and discharging cause light components in the crude oil to volatilize and escape, forming flash vapor. These flash vapors are mainly composed of light hydrocarbons, such as methane, ethane, propane, and butane, and contain small amounts of hydrogen sulfide and nitrogen. They are flammable and explosive volatile organic compounds, possessing toxicity and corrosiveness, and are highly flammable and explosive, thus having certain recycling value.

[0003] When recovering crude oil flash vapor, since the flash vapor may carry a small amount of crude oil droplets, mechanical impurities, dust, etc., if it directly enters core equipment such as compressors and condensers, it can easily lead to equipment wear, reduced heat exchange efficiency, and reduced purity of recovered products. Therefore, it is necessary to install a filter screen to filter the flash vapor. However, after long-term operation, rust and dust will accumulate on the surface of the filter screen, which will affect the flow and filtration effect. In view of this, we propose a closed flash vapor recovery system for crude oil storage tanks. Utility Model Content

[0004] The purpose of this invention is to provide a closed-loop recovery system for flash vapor in crude oil storage tanks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a closed-loop flash vapor recovery system for crude oil storage tanks, comprising a filter pipe and two transmission pipes. The two transmission pipes are arranged on the left and right sides of the filter pipe and communicate with the interior of the filter pipe. A filter box is arranged inside the filter pipe and communicates with the interior of the filter pipe. A filter screen is fixedly connected to the inner wall of the filter box, and a guide bearing is arranged on the filter screen. A fixing rod is fixedly connected to the inner wall of the filter box, and a first mounting frame is fixedly connected to the end of the fixing rod. A membrane is fixedly connected to the inner wall of the first mounting frame, and a force-bearing plate is fixedly connected to the right side of the membrane. A displacement rod is fixedly connected to the right side surface of the force-bearing plate, and the right end of the displacement rod slides out of the right side surface of the filter screen through the guide bearing. A cleaning assembly is provided on the filter box.

[0006] Preferably, the cleaning component includes a second mounting frame, which is fixedly connected to the inner wall of the filter box, and a connecting rod is fixedly connected to the inner wall of the second mounting frame.

[0007] Preferably, a limiting ring is fixedly connected to the end of the connecting rod, and a rotating ring is movably sleeved on the outer surface of the displacement rod.

[0008] Preferably, the outer surface of the rotating ring is provided with an annular groove, the annular groove is adapted to the limiting ring, and the limiting ring is rotatably sleeved inside the annular groove.

[0009] Preferably, an L-shaped cleaning plate is fixedly connected to the left side surface of the rotating ring, and a spiral groove is formed on the outer surface of the displacement rod.

[0010] Preferably, a spherical protrusion is fixedly connected to the inner wall of the rotating ring, the spherical protrusion being located inside the spiral groove, and an air collecting ring is fixedly connected to the inner wall of the filter box.

[0011] Preferably, a conical groove is formed on the left side surface of the air collecting ring, and the upper surface of the filter box extends out of the filter tube.

[0012] Preferably, connecting ears are fixedly connected to the left and right sides of the filter box, and fixing bolts are provided on the connecting ears. A lifting handle is fixedly connected to the upper side of the filter box.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This crude oil storage tank flash vapor closed recovery system can use the pressure of the flash vapor itself during transmission, along with the membrane, force plate and displacement rod, to clean the filter screen. The entire cleaning process does not require external force, saving energy and extending the service life of the filter screen.

[0015] 2. The crude oil storage tank flash vapor closed recovery system, with its detachable filter box design, allows for the removal of the filter box by unscrewing the fixing bolts and then using the lifting handle when it is necessary to collect internal impurities and perform regular maintenance, thereby increasing the operating space. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the structure of the crude oil storage tank flash vapor closed recovery system of this utility model;

[0018] Figure 2 This is a schematic diagram of the interior of the filter box of this utility model;

[0019] Figure 3 This is a schematic plan view of the overall structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the spiral groove of this utility model.

[0021] Reference numerals: 1. Filter tube; 2. Transmission tube; 3. Filter box; 4. Filter screen; 5. Guide bearing; 6. Fixing rod; 7. First mounting frame; 8. Membrane; 9. Force-receiving plate; 10. Displacement rod; 11. Second mounting frame; 12. Connecting rod; 13. Limiting ring; 14. Rotating ring; 15. Annular groove; 16. L-shaped cleaning plate; 17. Spiral groove; 18. Spherical protrusion; 19. Air collecting ring; 20. Connecting ear; 21. Fixing bolt; 22. Lifting handle. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a closed-loop flash vapor recovery system for crude oil storage tanks, including a filter pipe 1 and two transmission pipes 2. The two transmission pipes 2 are located on the left and right sides of the filter pipe 1 and are connected to the interior of the filter pipe 1. A filter box 3 is installed inside the filter pipe 1 and is connected to the interior of the filter pipe 1. A filter screen 4 is fixedly connected to the inner wall of the filter box 3. A guide bearing 5 is installed on the filter screen 4. A fixing rod 6 is fixedly connected to the inner wall of the filter box 3. A first mounting frame 7 is fixedly connected to the end of the fixing rod 6. A membrane 8 is fixedly connected to the inner wall of the first mounting frame 7. A force-receiving plate 9 is fixedly connected to the right side of the membrane 8. A displacement rod 10 is fixedly connected to the right surface of the force-receiving plate 9. The right end of the displacement rod 10 slides out of the right surface of the filter screen 4 through the guide bearing 5. A cleaning component is installed on the filter box 3, which can use the pressure of the flash vapor itself during transmission, in conjunction with the membrane 8, the force-receiving plate 9, and the displacement rod 10, to clean the filter screen 4. The entire cleaning process does not require external force, saving energy and extending the service life of the filter screen 4.

[0024] Furthermore, the cleaning assembly includes a second mounting frame 11, which is fixedly connected to the inner wall of the filter box 3. A connecting rod 12 is fixedly connected to the inner wall of the second mounting frame 11, and a limiting ring 13 is fixedly connected to the end of the connecting rod 12. A rotating ring 14 is movably sleeved on the outer surface of the displacement rod 10. An annular groove 15 is formed on the outer surface of the rotating ring 14, which is adapted to the limiting ring 13. The limiting ring 13 is rotatably sleeved inside the annular groove 15. An L-shaped cleaning plate 16 is fixedly connected to the left side surface of the rotating ring 14. A spiral groove 17 is formed on the outer surface of the displacement rod 10, and a spherical protrusion is fixedly connected to the inner wall of the rotating ring 14. 18. The spherical protrusion 18 is located inside the spiral groove 17. The inner wall of the filter box 3 is fixedly connected to the air collecting ring 19. The left side surface of the air collecting ring 19 is provided with a conical groove. The upper surface of the filter box 3 extends out of the filter tube 1. The left and right sides of the filter box 3 are respectively fixedly connected to the connecting ears 20. The connecting ears 20 are provided with fixing bolts 21. The upper surface of the filter box 3 is fixedly connected to the lifting handle 22. With the detachable design of the filter box 3, when it is necessary to collect internal impurities and perform regular maintenance, the fixing bolts 21 can be removed, and then the filter box 3 can be removed as a whole using the lifting handle 22 to increase the operating space.

[0025] The rotating ring 14 completely covers the spiral groove 17 to prevent impurities from entering the interior of the spiral groove 17 and affecting the transmission.

[0026] Working principle: When recovering crude oil flash vapor, the flash vapor is first pressurized and enters the interior of the left transmission pipe 2. After entering the interior of the left transmission pipe 2, the flash vapor comes into contact with the membrane 8 and pushes the membrane 8 to the right to create a depression. Then, the membrane 8 pushes the force plate 9 to move. When the force plate 9 moves, it will drive the displacement rod 10 to move synchronously. Since the displacement rod 10 is restricted to linear motion by the guide bearing 5 and cannot rotate, the rotating ring 14 is driven to rotate by the cooperation of the spiral groove 17 and the spherical protrusion 18. When the rotating ring 14 rotates, it will drive the L-shaped cleaning plate 16 to move synchronously. Then, the rotation of the L-shaped cleaning plate 16 is used to clean the filter screen 4. At the same time, when it is necessary to collect internal impurities and perform regular maintenance, the fixing bolt 21 can be removed, and then the filter box 3 can be removed as a whole by using the lifting handle 22 to increase the operating space.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A system for the recovery of flashing gas from a crude oil storage tank, comprising a filter pipe (1) and two transfer pipes (2), characterized in that: Two transmission pipes (2) are arranged on the left and right sides of the filter pipe (1). The two transmission pipes (2) are connected to the interior of the filter pipe (1). A filter box (3) is arranged inside the filter pipe (1). The filter box (3) is connected to the interior of the filter pipe (1). A filter screen (4) is fixedly connected to the inner wall of the filter box (3). A guide bearing (5) is arranged on the filter screen (4). A fixing rod (6) is fixedly connected to the inner wall of the filter box (3). A first mounting frame (7) is fixedly connected to the end of the fixing rod (6). A membrane (8) is fixedly connected to the inner wall of the first mounting frame (7). A force-receiving plate (9) is fixedly connected to the right side of the membrane (8). A displacement rod (10) is fixedly connected to the right surface of the force-receiving plate (9). The right end of the displacement rod (10) slides out of the right surface of the filter screen (4) through the guide bearing (5). A cleaning component is arranged on the filter box (3).

2. The crude oil storage tank flash gas containment recovery system of claim 1, wherein: The cleaning component includes a second mounting frame (11), which is fixedly connected to the inner wall of the filter box (3), and a connecting rod (12) is fixedly connected to the inner wall of the second mounting frame (11).

3. The closed-loop recovery system for flash vapor from crude oil storage tanks according to claim 2, characterized in that: The end of the connecting rod (12) is fixedly connected to a limiting ring (13), and the outer surface of the displacement rod (10) is movably fitted with a rotating ring (14).

4. The closed-loop recovery system for flash vapor in crude oil storage tanks according to claim 3, characterized in that: The outer surface of the rotating ring (14) is provided with an annular groove (15), which is adapted to the limiting ring (13), and the limiting ring (13) is rotatably sleeved inside the annular groove (15).

5. The closed-loop recovery system for flash vapor in crude oil storage tanks according to claim 4, characterized in that: An L-shaped cleaning plate (16) is fixedly connected to the left side surface of the rotating ring (14), and a spiral groove (17) is provided on the outer surface of the displacement rod (10).

6. The closed-loop recovery system for flash vapor from crude oil storage tanks according to claim 5, characterized in that: The inner wall of the rotating ring (14) is fixedly connected with a spherical protrusion (18), which is located inside the spiral groove (17). The inner wall of the filter box (3) is fixedly connected with an air collecting ring (19).

7. The closed-loop recovery system for flash vapor from crude oil storage tanks according to claim 6, characterized in that: The left side surface of the gas collecting ring (19) is provided with a conical groove, and the upper side surface of the filter box (3) extends out of the filter tube (1).

8. The closed-loop recovery system for flash vapor from crude oil storage tanks according to claim 7, characterized in that: The filter box (3) has connecting ears (20) fixedly connected to the left and right sides respectively, and fixing bolts (21) are provided on the connecting ears (20). The filter box (3) has a lifting handle (22) fixedly connected to the upper side.

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