A light hydrocarbon filtering device

Abstract

The utility model discloses a light hydrocarbon filtering device, including filter structure, shunt structure, switching structure and filter sand structure, filter structure has the cavity and the feed port of intercommunication cavity, shunt structure is located at the cavity, and the cavity is spaced as feed chamber and filter sand chamber, and has multiple groups of flow channel that links through filter chamber and filter sand chamber, and each group's flow channel is equipped with a plurality, and the feed chamber is communicated feed port, switching structure is movably arranged in shunt structure, and when moving, can open each group's flow channel in turn, and when opening one group's flow channel, closes other group's flow channel, and filter sand structure is arranged in filter sand chamber. The scheme has effectively prolonged the filtration cycle of light hydrocarbon filtering device, alleviated the burden of operating personnel maintenance filter sand structure, and ensured the filtration effect.

Description

Technical Field

[0001] This utility model relates to the technical field of light hydrocarbon filtration equipment, specifically to a light hydrocarbon filtration device. Background Technology

[0002] In existing processes, stabilized light hydrocarbons undergo cyclic acid washing for desulfurization, alkali washing for deacidification, sedimentation, and sand filtration to produce high-quality stabilized light hydrocarbons with low sulfur content and good color. The stabilized light hydrocarbon sand filtration process refers to the use of oil-based decolorizing sand (such as silica gel decolorizing sand) to remove impurities from the stabilized light hydrocarbons and reduce their color.

[0003] Publication number CN212741246U discloses a light hydrocarbon filtration device. When in operation, before the stabilized light hydrocarbons enter the sand filter tank through the light hydrocarbon feed pipe, they first flow through the feed disperser. Under the buffering, dispersion and deflection effect of the dispersion baffle, the inlet pressure of the sand filter tank is reduced, thereby effectively preventing the formation of a local filtration channel by the direct impact of the stabilized light hydrocarbons feeding process and the oil decolorizing sand in the sand filter tank.

[0004] However, light hydrocarbons always have a certain impact force after passing through the bottom dispersion baffle. After acting on the oil decolorizing sand for a certain period of time, they will still form local filtration channels, requiring operators to maintain the oil decolorizing sand regularly. In order to reduce the workload of operators, it is urgent to develop a light hydrocarbon filtration device that can extend the service life of oil decolorizing sand. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a light hydrocarbon filtration device. This device solves the problem that in the existing technology, light hydrocarbons always have a certain impact force after passing through the bottom dispersion baffle. After acting on the oil decolorizing sand for a certain period of time, they will still form local filtration channels, requiring operators to maintain the oil decolorizing sand regularly. In order to reduce the workload of operators, it is urgent to develop a light hydrocarbon filtration device that can extend the service life of oil decolorizing sand.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a light hydrocarbon filtration device, comprising:

[0008] A filter structure having a cavity and a feed inlet communicating with the cavity;

[0009] A flow-diverting structure is provided in the cavity, dividing the cavity into a feed chamber and a filter chamber, and has multiple sets of flow channels connecting the feed chamber and the filter chamber, with each set having multiple flow channels, and the feed chamber is connected to the feed inlet;

[0010] The switching structure is active in the diversion structure, and during activity, it can sequentially open the flow channels of each group, and when opening the flow channel of one group, it closes the flow channels of other groups; and

[0011] A filter structure is provided in the filter chamber.

[0012] In some embodiments, the switching structure is located at one end of the flow channel and is movably pressed against the diversion structure, and has a plurality of connecting holes, each of the plurality of connecting holes corresponding one-to-one with a plurality of flow channels in each group, and sequentially connecting multiple groups of flow channels when moving with the switching structure, and isolating the flow channels of other groups when connecting the flow channels of one group.

[0013] In some embodiments, the switching structure is rotatable relative to the diversion structure, and its rotation axis coincides with the arrangement direction of the feed chamber and the filter sand chamber;

[0014] Multiple sets of the flow channels are sequentially arranged on the flow splitting structure along the rotation direction of the switching structure.

[0015] In some embodiments, the light hydrocarbon filtration device further includes a drive sleeve, a magnetic suction part, and an adsorption part. The drive sleeve is sleeved outside the filtration structure and surrounds the switching structure, and can rotate about the axis of the switching structure. The magnetic suction part and the adsorption part can be magnetically attracted, and one of them is located in the drive sleeve and the other is located in the switching structure.

[0016] In some embodiments, the flow channel is provided in two sets;

[0017] One of the drive sleeve and the filter structure is provided with a limiting block, and the other is provided with a limiting groove for the limiting block to slide. The limiting groove extends circumferentially along the drive sleeve, and both ends of its extension direction have blocking sidewalls for blocking the limiting block.

[0018] In some embodiments, multiple limiting blocks and multiple limiting grooves are provided, with each of the multiple limiting blocks corresponding to one of the multiple limiting grooves, and the multiple limiting blocks are spaced apart along the circumferential direction of the drive sleeve.

[0019] In some embodiments, the outer wall of the drive sleeve is provided with anti-slip stripes.

[0020] In some embodiments, the filtration structure includes a filter cylinder and a filter sand cylinder. Both the filter cylinder and the filter sand cylinder have cavities with an opening on one side and are detachably connected. When connected, the two openings are joined together to form the cavity.

[0021] The flow diversion structure is disposed inside the filter cylinder and located at one end of the filter cylinder near the sand filter cylinder, and the sand filter structure is located inside the sand filter cylinder.

[0022] In some embodiments, the switching structure is located on the side of the diversion structure closer to the filter cartridge;

[0023] The filter cartridge is provided with a guide tube extending toward the filter cartridge. The guide tube extends into the filter cartridge from the opening of the filter cartridge and blocks the switching structure.

[0024] In some embodiments, multiple diversion structures are provided, and the multiple diversion structures are spaced apart along a direction away from the filter sand chamber;

[0025] The switching structure is movably installed in the diversion structure near the filter chamber.

[0026] Compared with the prior art, the light hydrocarbon filtration device provided by this utility model, during operation, first moves the switching structure to a position where multiple channels of one group of the diversion structure connect the feed chamber and the filter sand chamber. At this time, the channels of other groups of the diversion structure remain closed, and then light hydrocarbons are transported from the feed inlet to the feed chamber. After the diversion structure continuously diverts and buffers the light hydrocarbons entering the feed chamber for a certain period of time, if a local channel appears at the position of the corresponding channel of the filter sand structure, the switching structure can be moved to a position where multiple channels of another group of the diversion structure connect the feed chamber and the filter sand chamber, while the channels of other groups of the diversion structure remain closed.

[0027] Since the filter sand structure corresponding to the connecting channel has not been directly impacted by light hydrocarbons, it is in relatively intact condition and has sufficient filtration capacity to filter normally. Once a local channel appears in the filter sand structure, the switching structure is switched to the next set of channels, and this process is repeated until local channels appear in multiple sets of channels corresponding to the filter sand structure. This effectively extends the filtration cycle of the light hydrocarbon filtration device, reduces the burden on operators in maintaining the filter sand structure, and ensures filtration efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the light hydrocarbon filtration device provided in an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 Exploded view of a light hydrocarbon filtration unit;

[0030] Figure 3 yes Figure 1 Partial cross-sectional view of a medium-light hydrocarbon filtration unit;

[0031] Figure 4 yes Figure 3 Exploded view of the splitter structure and switching structure;

[0032] Figure 5 yes Figure 2 A schematic diagram of the splitter structure, switching structure, and drive sleeve;

[0033] Figure 6 yes Figure 3 Schematic diagram of the middle filter cartridge, flow splitting structure and switching structure;

[0034] Figure 7 yes Figure 1 A schematic diagram of the filter cartridge and drive sleeve.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Filter structure; 1a. Feed inlet; 1b. Feed chamber; 1c. Filter sand chamber; 1d. Limiting groove; 1d1. Stopping side wall; 11. Filter cylinder; 12. Filter sand cylinder; 13. Guide cylinder; 2. Diversion structure; 2a. Flow channel; 3. Switching structure; 3a. Connecting hole; 4. Filter sand structure; 5. Drive sleeve; 51. Limiting block; 6. Magnetic suction part; 7. Fitting part. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 illustrative of the present utility model and are not intended to limit the present utility model.

[0038] To address the problem that in existing technologies, light hydrocarbons, after passing through the bottom dispersion baffle, always exert a certain impact force, and even after acting on the oil decolorizing sand for a certain period of time, still form local filtration channels, requiring operators to regularly maintain the oil decolorizing sand, and to reduce the workload of operators, there is an urgent need to develop a light hydrocarbon filtration device that can extend the service life of the oil decolorizing sand. This utility model provides a light hydrocarbon filtration device that can effectively extend the filtration cycle of the light hydrocarbon filtration device, reduce the burden on operators to maintain the filter sand structure, and ensure the filtration effect.

[0039] Please see Figures 1 to 4 , Figures 1 to 4 This is a schematic diagram of a light hydrocarbon filtration device in one embodiment of the present invention. The light hydrocarbon filtration device includes a filtration structure 1, a diversion structure 2, a switching structure 3, and a filter sand structure 4. The filtration structure 1 has a cavity and an inlet 1a connecting the cavity. The diversion structure 2 is located in the cavity and divides the cavity into an inlet cavity 1b and a filter sand cavity 1c. It also has multiple sets of flow channels 2a connecting the inlet cavity and the filter sand cavity 1c. Each set of flow channels 2a has multiple flow channels. The inlet cavity 1b is connected to the inlet 1a. The switching structure 3 is movably located in the diversion structure 2 and can sequentially open each set of flow channels 2a when it is in motion. When one set of flow channels 2a is opened, the flow channels 2a of other sets are closed. The filter sand structure 4 is located in the filter sand cavity 1c.

[0040] When the light hydrocarbon filtration device provided by this utility model is in operation, the switching structure 3 is first moved to a position where multiple flow channels 2a of one group of diversion structure 2 connect to the feed chamber 1b and the filter sand chamber 1c. At this time, the flow channels 2a of other groups of diversion structure 2 remain closed, and light hydrocarbons are then transported from the feed inlet 1a to the feed chamber 1b. After the diversion structure 2 continuously diverts and buffers the light hydrocarbons entering the feed chamber 1b for a certain period of time, if a local channel appears at the position of the filter sand structure 4 corresponding to the flow channel 2a, the switching structure 3 can be moved to a position where multiple flow channels 2a of another group of diversion structure 2 connect to the feed chamber 1b and the filter sand chamber 1c, while the flow channels 2a of other groups of diversion structure 2 remain closed.

[0041] Since the filter sand structure 4 corresponding to the connecting flow channel 2a has not been directly impacted by light hydrocarbons, it is in a relatively intact state and has sufficient filtration capacity to filter normally. Once a local channel appears in the filter sand structure 4, the switching structure 3 is switched to the next set of flow channels 2a, and this process is repeated until local channels appear in multiple sets of flow channels 2a corresponding to the filter sand structure 4. This effectively extends the filtration cycle of the light hydrocarbon filtration device, reduces the burden on operators maintaining the filter sand structure 4, and ensures filtration efficiency.

[0042] It should be noted that, in one embodiment, the switching structure 3 is a movable valve located in each flow channel 2a. By controlling the opening and closing of each valve, the flow channels 2a of each group are opened and closed sequentially. In another embodiment, the switching structure 3 is an array of multiple blocking rods, each corresponding to a flow channel 2a, and capable of extending into and retracting from the corresponding flow channel 2a, so as to achieve the sequential opening and closing of each group of flow channels 2a.

[0043] In another embodiment, the switching structure 3 is located at one end of the flow channel 2a and is movably pressed against the diversion structure 2. It has multiple connecting holes 3a, which correspond one-to-one with the multiple flow channels 2a of each group. When the switching structure 3 moves, it sequentially connects multiple groups of flow channels 2a, and when it connects one group of flow channels 2a, it is isolated from the flow channels 2a of other groups.

[0044] In this embodiment, the switching structure 3 is used to sequentially connect multiple sets of flow channels 2a through multiple connecting holes 3a on the switching structure 3. This ensures that one set of flow channels 2a is open while other sets of flow channels 2a are closed, making the switching structure 3 relatively simple and easy to operate. It should be noted that the switching structure 3 with connecting holes 3a can be configured as a switching plate, switching seat, or irregularly shaped structure with connecting holes 3a. Furthermore, the flow diversion structure 2 can also be configured as a flow diversion plate, flow diversion seat, or irregularly shaped structure with flow channels 2a. Specifically, in this solution, the switching structure 3 is a switching plate with multiple connecting holes 3a. Correspondingly, the flow diversion structure 2 is configured as a flow diversion plate.

[0045] It should be noted that, in one embodiment, the switching structure 3 includes multiple switching blocks, which are slidably disposed relative to the diversion structure 2 to open and close multiple sets of flow channels 2a. In another embodiment, the switching structure 3 is a valve plate disposed in each flow channel 2a, which is rotatably disposed relative to the inner wall of the flow channel 2a to realize the opening and closing of the flow channel 2a.

[0046] In another embodiment, the switching structure 3 can rotate relative to the diversion structure 2, and its rotation axis coincides with the arrangement direction of the feed chamber 1b and the filter sand chamber 1c; multiple sets of flow channels 2a are arranged sequentially on the diversion structure 2 along the rotation direction of the switching structure 3.

[0047] In this embodiment, by rotating the switching structure 3 as described above, multiple connecting holes 3a on the switching structure 3 are sequentially connected to multiple sets of flow channels 2a, reducing the space required for the switching structure 3 to move and making the overall structure relatively compact.

[0048] In one embodiment, please refer to Figure 3 and Figure 5 The light hydrocarbon filtration device also includes a drive sleeve 5, a magnetic suction part 6, and an adsorption part. The drive sleeve 5 is sleeved outside the filter structure 1 and surrounds the switching structure 3, and can rotate around the axis of the switching structure 3. The magnetic suction part 6 and the adsorption part can be magnetically attracted, and one of them is located in the drive sleeve 5 and the other is located in the switching structure 3.

[0049] In this embodiment, since the magnetic attraction part 6 and the adsorption part can magnetically attract each other, the switching structure 3 can be synchronously pulled to rotate when the drive sleeve 5 rotates, realizing the sequential opening of multiple flow channels 2a, making the rotation of the switching structure 3 relatively convenient. It should be noted that one of the magnetic attraction part 6 and the mating part 7 can be set as a magnet, and the other can be set as a magnet with opposite magnetic properties or iron-cobalt-nickel metal. Moreover, the magnetic attraction part 6 and the mating part 7 can be set in the form of magnetic particles, magnetic strips, or magnetic blocks. Specifically, in this solution, the magnetic attraction part 6 and the mating part 7 are set as two strong magnets with opposite magnetic properties to improve the magnetic attraction between them. At the same time, the magnetic attraction part 6 is set on the drive sleeve 5 and is set as a magnetic strip. The mating part 7 is set on the switching structure 3 and is set as a magnetic block.

[0050] Furthermore, in this embodiment, the filter structure 1 is made of a transparent material to facilitate observation.

[0051] It should be noted that the number of groups in flow channel 2a can be set according to the actual situation; two, three, or four groups can be set. For details, please refer to [link / reference needed]. Figure 4 In this embodiment, two sets of flow channels 2a are provided, and each set of flow channels 2a has six channels. Figure 4 The flow channels 2a inside the dashed line form one group, and the flow channels 2a outside the dashed line form another group.

[0052] In one embodiment, please refer to Figure 6 and Figure 7 One of the drive sleeve 5 and the filter structure 1 is provided with a limiting block 51, and the other is provided with a limiting groove 1d for the limiting block 51 to slide. The limiting groove 1d extends along the circumference of the drive sleeve 5, and both ends of its extension direction have a blocking sidewall 1d1 for blocking the limiting block 51.

[0053] In this embodiment, when the limiting block 51 is blocked by the blocking side wall 1d1 of the limiting groove 1d, it indicates that the switching structure 3 is in the position where the flow channel 2a of a set is in the conducting position, so that the operator can quickly switch the switching structure 3 to the position of the conducting flow channel 2a, thereby improving the switching efficiency.

[0054] In one embodiment, multiple limit blocks 51 and multiple limit grooves 1d are provided, with multiple limit blocks 51 corresponding to multiple limit grooves 1d one by one, and multiple limit blocks 51 are arranged at intervals along the circumference of the drive sleeve 5.

[0055] In this embodiment, multiple limiting grooves 1d are provided at intervals along the circumference of the drive sleeve 5 to improve the stability of the rotation of the drive sleeve 5. Specifically, in this embodiment, two sets of limiting grooves 1d and limiting blocks 51 are provided respectively. The limiting grooves 1d and the limiting blocks 51 correspond one-to-one. Moreover, the limiting grooves 1d are located on the outer wall of the filter structure 1, and the limiting blocks 51 are located on the inner wall of the drive sleeve 5.

[0056] To facilitate the operator's rotation of the drive sleeve 5, anti-slip stripes are provided on the outer wall of the drive sleeve 5.

[0057] It should be noted that, in one embodiment, the filter sand structure 4 is configured as oil decolorizing sand filled in the filter sand cavity 1c. In another embodiment, the filter sand structure 4 includes a flexible filter bag and oil decolorizing sand filled in the flexible filter bag. Alternatively, the filter sand structure 4 can be configured as a rigid filter bag and oil decolorizing sand filled in the rigid filter bag.

[0058] In addition, the filter structure 1 can be configured as a housing, seat, or capsule with a cavity.

[0059] In one embodiment, the filter structure 1 includes a filter cylinder 11 and a filter sand cylinder 12. Both the filter cylinder 11 and the filter sand cylinder 12 have cavities with an opening on one side and are detachably connected. When connected, the two openings are joined together to form a cavity. The diversion structure 2 is disposed inside the filter cylinder 11 and is located at one end of the filter cylinder 11 near the filter sand cylinder 12. The filter sand structure 4 is located inside the filter sand cylinder 12.

[0060] In this embodiment, the filter cartridge 11 and the filter sand cartridge 12 can be disassembled periodically for maintenance and replacement of their components and filter sand structure 4, improving practicality. It should be noted that the filter cartridge 11 and the filter sand cartridge 12 can be detachably connected via clips, latches, bolts, or other structures. Specifically, in this embodiment, the filter cartridge 11 and the filter sand cartridge 12 are threaded together.

[0061] In one embodiment, the switching structure 3 is located on the side of the diversion structure 2 near the filter cylinder 12; the filter cylinder 12 extends toward the filter cylinder 11 and is provided with a guide cylinder 13, which extends into the filter cylinder 11 from the opening of the filter cylinder 11 and blocks the switching structure 3.

[0062] In this embodiment, the guide cylinder 13 facilitates the docking of the filter cylinder 11 and the filter sand cylinder 12, improving convenience. Furthermore, when the filter cylinder 11 and the filter sand cylinder 12 are disassembled, the switching structure 3 can be quickly removed, facilitating cleaning. It should be understood that when the filter cylinder 11 and the filter sand cylinder 12 are connected, the guide cylinder 13, the switching structure 3, and the diversion structure 2 are provided with a certain dimensional gap in the axial direction to ensure that the switching structure 3 can be driven to rotate by the drive structure.

[0063] In one embodiment, multiple diversion structures 2 are provided, and the multiple diversion structures 2 are spaced apart along the direction away from the filter chamber 1c; the switching structure 3 is movably installed on the diversion structure 2 close to the filter chamber 1c.

[0064] In this embodiment, multiple diversion structures 2 are provided to further improve the diversion effect of the device on light hydrocarbons and reduce the impact force of light hydrocarbons on the filter sand structure 4. Specifically, the flow channels 2a of the multiple diversion structures 2 are staggered, and the inner diameter of the feed chamber is larger than the inner diameter of the feed inlet 1a. In this scheme, there are three diversion structures 2.

[0065] To better understand this utility model, the following is combined with... Figures 1 to 7 The technical solution of this utility model is described in detail below:

[0066] In this scheme, the light hydrocarbon filtration device first rotates the drive sleeve 5, which magnetically drives the switching structure 3 to rotate synchronously. This moves the switching structure 3 to a position where multiple flow channels 2a of one group of diversion structure 2 connect to the feed chamber 1b and the filter sand chamber 1c. At this time, the flow channels 2a of other groups of diversion structure 2 remain closed, and light hydrocarbons are then transported from the feed inlet 1a to the feed chamber 1b. After the diversion structure 2 continuously diverts and buffers the light hydrocarbons entering the feed chamber 1b for a certain period of time, if a local channel appears at the position of the corresponding flow channel 2a of the filter sand structure 4, the drive sleeve 5 can be rotated again, and the switching structure 3 can be moved to a position where multiple flow channels 2a of another group of diversion structure 2 connect to the feed chamber 1b and the filter sand chamber 1c, while the flow channels 2a of other groups of diversion structure 2 remain closed.

[0067] Since the filter sand structure 4 corresponding to the connecting channel 2a has not been directly impacted by light hydrocarbons, it is in a relatively intact state and has sufficient filtration capacity to filter normally. After a local channel appears in the filter sand structure 4, the switching structure 3 is switched to the next set of channels 2a, and so on, until local channels appear in multiple sets of channels 2a corresponding to the filter sand structure 4.

[0068] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A light hydrocarbon filtration device, characterized in that, include: A filter structure having a cavity and a feed inlet communicating with the cavity; A flow-diverting structure is provided in the cavity, dividing the cavity into a feed chamber and a filter chamber, and has multiple sets of flow channels connecting the feed chamber and the filter chamber, with each set having multiple flow channels, and the feed chamber is connected to the feed inlet; The switching structure is active in the diversion structure, and when active, it can sequentially open the flow channels of each group, and when opening the flow channels of one group, it closes the flow channels of other groups; and A filter structure is provided in the filter chamber.

2. The light hydrocarbon filtration device according to claim 1, characterized in that, The switching structure is located at one end of the flow channel and is movably pressed against the diversion structure. It has multiple connecting holes, each of which corresponds to one of the multiple flow channels in each group. When the switching structure moves, it sequentially connects multiple groups of flow channels and disconnects from the flow channels of other groups when connecting one group of flow channels.

3. The light hydrocarbon filtration device according to claim 2, characterized in that, The switching structure can rotate relative to the diversion structure, and its rotation axis coincides with the arrangement direction of the feed chamber and the filter sand chamber; Multiple sets of the flow channels are sequentially arranged on the flow splitting structure along the rotation direction of the switching structure.

4. The light hydrocarbon filtration device according to claim 3, characterized in that, The light hydrocarbon filtration device further includes a drive sleeve, a magnetic suction part, and an adsorption part. The drive sleeve is sleeved outside the filtration structure and surrounds the switching structure, and can rotate around the axis of the switching structure. The magnetic suction part and the adsorption part can be magnetically attracted, and one of them is located in the drive sleeve and the other is located in the switching structure.

5. The light hydrocarbon filtration device according to claim 4, characterized in that, The flow channel is provided in two sets; One of the drive sleeve and the filter structure is provided with a limiting block, and the other is provided with a limiting groove for the limiting block to slide. The limiting groove extends circumferentially along the drive sleeve, and both ends of its extension direction have blocking sidewalls for blocking the limiting block.

6. The light hydrocarbon filtration device according to claim 5, characterized in that, The limiting block and the limiting groove are provided in multiple ways, and the multiple limiting blocks and the multiple limiting grooves correspond one-to-one, and the multiple limiting blocks are arranged at intervals along the circumference of the driving sleeve.

7. The light hydrocarbon filtration device according to claim 4, characterized in that, The outer wall of the drive sleeve is provided with anti-slip stripes.

8. The light hydrocarbon filtration device according to claim 1, characterized in that, The filtration structure includes a filter cylinder and a filter sand cylinder. Both the filter cylinder and the filter sand cylinder have cavities with an opening on one side and are detachably connected. When connected, the two openings are joined together to form the cavity. The flow diversion structure is disposed inside the filter cylinder and located at one end of the filter cylinder near the sand filter cylinder, and the sand filter structure is located inside the sand filter cylinder.

9. The light hydrocarbon filtration device according to claim 8, characterized in that, The switching structure is located on the side of the diversion structure closer to the filter cartridge; The filter cartridge is provided with a guide tube extending toward the filter cartridge. The guide tube extends into the filter cartridge from the opening of the filter cartridge and blocks the switching structure.

10. The light hydrocarbon filtration device according to claim 1, characterized in that, The flow diversion structure is provided in multiple ways, and the multiple flow diversion structures are spaced apart along the direction away from the filter sand chamber; The switching structure is movably installed in the diversion structure near the filter chamber.

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