A fuel oil desulfurization apparatus
By introducing a filtration and stirring mechanism into the fuel oil desulfurization unit, the problem of metal impurities affecting catalyst activity in traditional units has been solved, achieving efficient fuel oil desulfurization and system reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINESE PEOPLES LIBERATION ARMY AIR FORCE SERVICE ACAD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-23
AI Technical Summary
Traditional fuel oil desulfurization devices fail to effectively filter and pre-treat, leading to the interaction between metallic impurities and the catalyst, reducing catalyst activity and selectivity, and affecting the desulfurization effect.
The system employs a filtration and cleaning mechanism and a stirring mechanism. Metal impurities in the fuel oil are filtered through the filter holes on the baffle plate, and the stirring blades are driven by the rotating shaft to ensure that the fuel oil and catalyst are fully mixed.
It effectively intercepts metallic impurities, prevents catalyst poisoning and pipeline blockage, improves desulfurization efficiency and catalyst activity, and enhances the conversion rate of sulfides in fuel oil and the reliability of system operation.
Smart Images
Figure CN224394816U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fuel oil desulfurization technology, specifically, it relates to a fuel oil desulfurization device. Background Technology
[0002] Fuel oil (heavy oil), as a residual component of crude oil under atmospheric distillation, has a high sulfur content, and the sulfur is mostly in the form of large molecular cyclic sulfides (such as thiophene and benzothiophene). Traditional hydrodesulfurization technology relies on high temperature and pressure and precious metal catalysts (such as Co-Mo / Al2O3) to break the CS bond. However, it has limitations such as large equipment investment, high operating costs and easy catalyst poisoning.
[0003] To address the limitations of the aforementioned problems, a fuel oil desulfurization device is disclosed in utility model patent CN216136838U. This device, through the cooperation of a stirring component and an oxygen supply component, ensures sufficient contact between acidic compounds in the fuel oil and sodium hydroxide, allowing the removal of acidic sulfur-containing compounds and low-molecular-weight thiols. An aqueous solution of sodium hydroxide (alkaline solution) containing the catalyst polyphthalocyanine is used as the extractant. Through extraction, the thiols in the fuel oil are converted into sodium thiolate, which is then extracted into the alkaline solution. Under air as the oxidant, the sodium thiolate is oxidized to sodium hydroxide and disulfides, achieving the purpose of extracting and removing sulfides from the oil and recovering the NaOH alkaline solution, thus reducing costs and resource waste. However, this device does not perform pre-filtration of the fuel oil before desulfurization. This allows metallic impurities such as iron, nickel, and vanadium in the fuel oil to interact with the desulfurizing agent or catalyst, reducing the catalyst's activity and selectivity, thereby affecting the desulfurization effect.
[0004] Based on this, the present invention proposes a fuel oil desulfurization device to solve the problems existing in the prior art. Utility Model Content
[0005] In view of this, the main objective of this utility model is to provide a fuel oil desulfurization device to solve the problem that traditional desulfurization devices cannot perform pre-treatment filtration of fuel oil, which reduces the activity and selectivity of the catalyst and affects the desulfurization effect.
[0006] To achieve the above objectives, the basic concept of the technical solution adopted by this utility model is as follows:
[0007] A fuel oil desulfurization device includes a reaction cylinder and a support leg disposed at the bottom of the reaction cylinder. The reaction cylinder is provided with a filtration and cleaning mechanism and a stirring mechanism.
[0008] The filtration and cleaning mechanism includes a partition installed inside the reaction cylinder, which divides the inner cavity of the reaction cylinder into a pretreatment chamber and a reaction chamber. The pretreatment chamber is located on the upper side of the partition and is connected to the reaction chamber through a number of filter holes installed on the partition.
[0009] The stirring mechanism includes a rotating shaft rotatably disposed inside the reaction cylinder, and stirring blades are disposed on the rotating shaft.
[0010] In a preferred embodiment, the filtration and cleaning mechanism further includes a motor mounted on the reaction cylinder, a baffle is provided on the lower side of the top plate of the reaction cylinder, the output end of the motor passes through the baffle and is in contact with the cleaning scraper, and the cleaning scraper is in contact with the upper surface of the partition.
[0011] In a preferred embodiment, the filter cleaning mechanism further includes a plurality of feeding troughs disposed on the side of the partition away from the filter holes. The filter holes and feeding troughs are symmetrically disposed on both sides of the center of the partition. The feeding troughs are strip-shaped, and the width of the feeding troughs gradually increases outward from the center of the partition.
[0012] In a preferred embodiment, a through hole is provided on the side wall of the reaction cylinder, and a collection frame is movably disposed in the through hole. The collection frame is located below the partition at the location of the feeding trough, and a sliding strip is provided at the bottom of the collection frame to slide in connection with the mounting groove at the bottom of the through hole.
[0013] In a preferred embodiment, the stirring mechanism further includes a cam groove formed on the outer wall of the rotating shaft, a protrusion movably disposed in the cam groove, a limit rod disposed at the other end of the protrusion, and a limit ring movably disposed on the upper side of the limit rod; a connecting rod is also movably disposed on one side of the rotating shaft, and the end of the connecting rod away from the rotating shaft is connected to the stirring blade.
[0014] In a preferred embodiment, the limiting ring is movably sleeved on the outside of the rotating shaft and is connected to both the connecting rod and the stirring blade.
[0015] In a preferred embodiment, a limiting groove is also provided on the outer wall of the rotating shaft, and one end of the connecting rod is movably engaged in the limiting groove.
[0016] In a preferred embodiment, the end of the limiting rod away from the limiting ring is engaged in a groove on the inner wall of the reaction cylinder, and a movable sliding groove is also provided on the limiting rod, with the limiting ring movably disposed in the movable sliding groove.
[0017] In a preferred embodiment, the reaction cylinder is further provided with an inlet pipe and an outlet pipe. The inlet pipe is located above the feed inlet of the pretreatment chamber and communicates with the top wall of the reaction cylinder. The outlet pipe is located in the middle of the lower conical shell of the reaction cylinder and communicates with the reaction chamber.
[0018] In a preferred embodiment, a feeding port is also provided on one side wall of the reaction cylinder where the reaction chamber is located.
[0019] Compared with the prior art, the present invention provides a fuel oil desulfurization device, which has the following beneficial effects:
[0020] 1. With the filter cleaning mechanism, the fuel oil can be filtered through the filter holes on the baffle during use. This filters out metal impurities in the fuel oil, preventing them from affecting the desulfurization effect during the subsequent desulfurization process. At the same time, the cleaning scraper can be rotated to scrape away the metal impurities accumulated after filtration, thus preventing them from clogging the filter holes and affecting the subsequent filtration effect.
[0021] 2. By designing a stirring mechanism, a rotating shaft drives a cam groove to rotate, which in turn drives the stirring blades to rotate, thus achieving stirring. Simultaneously, the cam groove causes the stirring blades to move up and down, ensuring thorough mixing of fuel oil and catalyst during rotation. This improves desulfurization efficiency and solves the problem of traditional desulfurization devices failing to perform pre-filtration of fuel oil, reducing catalyst activity and selectivity, and thus affecting desulfurization performance. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the overall structure of the fuel oil desulfurization device of this utility model;
[0024] Figure 2 This is a schematic diagram showing the internal cross-section of the fuel oil desulfurization device of this utility model;
[0025] Figure 3 This is a cross-sectional structural diagram of the filter cleaning mechanism of this utility model;
[0026] Figure 4 This is an installation effect diagram of the stirring mechanism of this utility model;
[0027] Figure 5 This is a schematic diagram of the stirring mechanism of this utility model;
[0028] Figure 6This is a schematic diagram of the limiting ring of this utility model;
[0029] Figure 7 This is a top view of the partition of this utility model;
[0030] Figure 8 This utility model Figure 5 A magnified view of a portion of point A in the middle.
[0031] [Explanation of Key Component Symbols]
[0032] 1. Reaction cylinder; 11. Feed pipe; 12. Discharge pipe; 13. Adding port; 2. Support leg; 3. Filter cleaning mechanism; 31. Protective frame; 32. Motor; 33. Baffle; 34. Cleaning scraper; 35. Partition plate; 36. Filter hole; 37. Discharge chute; 38. Installation slide; 39. Sliding bar; 310. Collection frame; 4. Stirring mechanism; 41. Rotating shaft; 42. Cam groove; 43. Protrusion; 44. Connecting rod; 45. Stirring blade; 46. Limiting rod; 47. Limiting ring. Detailed Implementation
[0033] The structure of this fuel oil desulfurization device will be further described in detail below with reference to the accompanying drawings and embodiments of this utility model.
[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0037] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 9 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0038] The following is combined with Figures 1 to 8 Describe the structure of the fuel oil desulfurization device of this utility model.
[0039] A fuel oil desulfurization device includes a reaction cylinder 1 and a support leg 2 installed at the bottom of the reaction cylinder 1. The support leg 2 is rigidly connected to ensure the operational stability of the reaction cylinder 1. The reaction cylinder 1, serving as the site for the fuel oil desulfurization process, is a cylindrical structure with an inlet pipe 11 and an outlet pipe 12 at its upper and lower ends, respectively. A filtration and cleaning mechanism 3 and a stirring mechanism 4 are installed inside the reaction cylinder 1. During operation, the filtration and cleaning mechanism 3 intercepts hard particles such as metal shavings and catalyst carrier debris in the fuel oil, preventing them from entering the subsequent desulfurization reaction zone and causing catalyst poisoning or pipeline blockage. The stirring mechanism 4 thoroughly mixes the fuel oil and the desulfurization catalyst, improving the fuel oil desulfurization effect. The filtration and cleaning mechanism 3 includes a partition 35 disposed inside the reaction cylinder 1, which divides the inner cavity of the reaction cylinder 1 into a pretreatment chamber and a reaction chamber. The pretreatment chamber is located on the upper side of the partition 35 and is connected to the reaction chamber on the lower side of the partition 35 through several filter holes 36 disposed on the partition 35. During use, the filter holes 36 dynamically intercept hard particles such as metal shavings and catalyst carrier debris in the fuel oil, preventing them from entering the subsequent desulfurization reaction zone and causing catalyst poisoning or pipeline blockage. The stirring mechanism 4 includes a rotating shaft 41 rotatably disposed inside the reaction cylinder 1. Wear-resistant alloy stirring blades 45 are movably disposed on the rotating shaft 41. The high-speed rotation of the stirring blades 45 creates a turbulent field, promoting thorough mixing of the fuel oil and the desulfurization catalyst (such as zinc oxide or molybdenum-based composite). Simultaneously, the shearing action of the rotating stirring blades 45 breaks up oil droplets, increasing the reaction interface and enhancing the gas-liquid-solid three-phase contact efficiency. When in use, the filtration and cleaning mechanism 3 and the stirring mechanism 4 can work together to achieve a multi-stage desulfurization process of "impurity interception-efficient reaction", which significantly improves the conversion rate of sulfides (such as thiophene and benzothiophene) in fuel oil and the reliability of system operation.
[0040] In a preferred embodiment, such as Figure 2 and Figure 3 As shown, the filtration and cleaning mechanism 3 includes a protective frame 31 set on the top surface of the reaction cylinder 1. A motor 32 is set at the bottom end of the protective frame 31, and a baffle 33 is set on the lower side of the top plate of the reaction cylinder 1. The output end of the motor 32 passes through the baffle 33 and is connected to a cleaning scraper 34, which can drive the baffle 33 and the cleaning scraper 34 to rotate concentrically and synchronously. Several feeding grooves 37 are opened on the side of the partition plate 35 away from the filter hole 36. The width of the feeding groove 37 is larger than the diameter of the filter hole 36, and is used to pass hard particulate impurities such as metal shavings and catalyst carrier debris in the fuel oil.
[0041] In the above description, when the motor 32 is activated, it will drive the baffle 33 and the cleaning scraper 34 to rotate synchronously. As the cleaning scraper 34 rotates, it can scrape away the metal impurities and other substances remaining on the side of the filter hole 36 of the partition 35. Subsequently, the scraped metal impurities will move to the side of the discharge trough 37 and then fall downward through the discharge trough 37. At this time, the metal impurities will fall into the inside of the collection frame 310, thereby completing the collection of metal impurities.
[0042] It should be noted that motor 32 is existing technology known to those skilled in the art, and its power supply method can be selected according to the specific installation requirements on site, which will not be elaborated here.
[0043] Specifically, such as Figure 7 As shown, the filter holes 36 and the feeding trough 37 are symmetrically arranged on both sides of the center of the partition plate 35. The feeding trough 37 has a strip-shaped structure, and the width of the feeding trough 37 gradually increases outward from the center of the partition plate 35 to facilitate the falling of impurities of different particle sizes during use.
[0044] In a preferred embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, the outer wall of the reaction cylinder 1 is also provided with a through hole for installing the collection frame 310, and the bottom of the inner wall of the through hole is provided with two mounting grooves 38, which are used in conjunction with the sliding strips 39 provided at the bottom of the collection frame 310.
[0045] In the above description, by installing the slide groove 38 and the slide bar 39, the slide bar 39 is engaged in the installation slide groove 38 during use, which facilitates the installation of the collection frame 310. The collection frame 310 is installed on the lower side of the discharge trough 37 to collect hard particulate impurities such as metal shavings and catalyst carrier debris in the fuel oil.
[0046] In a preferred embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the feed pipe 11 is located above the feed inlet of the pretreatment chamber and communicates with the top wall of the reaction cylinder 1, for adding fuel oil into the reaction cylinder 1 through the feed pipe 11. The discharge pipe 12 is located in the middle of the lower conical shell of the reaction cylinder 1 and communicates with the reaction chamber, for discharging the desulfurized fuel oil during use. A feeding port 13 is also provided on one side wall of the reaction cylinder 1 where the reaction chamber is located, for adding catalysts and other substances during use. Simultaneously, control valves (which can be manual or electric, as per existing technology, and not shown in the figure) are provided on the feed pipe 11, discharge pipe 12, and feeding port 13 to control the opening and closing of the corresponding pipelines as needed.
[0047] In a preferred embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the stirring mechanism 4 also includes a cam groove 42 formed on the outer wall of the rotating shaft 41. A protrusion 43 is movably disposed in the cam groove 42, and the protrusion 43 is engaged in the cam groove 42 and slides along the cam groove 42. A connecting rod 44 is also movably disposed on one side of the rotating shaft 41, and the end of the connecting rod 44 away from the outer wall of the rotating shaft 41 is connected to the stirring blade 45. A limiting rod 46 is provided on the side of the protrusion 43 away from the cam groove 42. A limiting ring 47 is movably disposed on the top surface of the limiting rod 46. The limiting ring 47 is movably sleeved on the outside of the rotating shaft 41 and is fixedly connected to both the connecting rod 44 and the stirring blade 45, so that the up-and-down movement of the limiting ring 47 can drive the connecting rod 44 and the stirring blade 45 to move up and down along the length direction of the rotating shaft 41.
[0048] In the above description, the filtered fuel oil will flow to the middle of the reaction chamber inside the reaction cylinder 1 under the action of gravity. At the same time, the catalyst is introduced through the feed pipe 11 on the outer wall of the reaction cylinder 1. When the motor 32 is started, it will drive the rotating shaft 41 and the cam groove 42 to rotate. As the rotating shaft 41 rotates, it will drive the stirring blade 45 to rotate synchronously. The rotation of the stirring blade 45 will stir and mix the fuel oil and the catalyst. Simultaneously, during the rotation of the cam groove 42, under the resistance of the oil and the driving action of the rotating shaft 41, the protrusion 43 and the limiting rod 46 will move up and down reciprocally. As the protrusion 43 moves up and down, the limiting ring 47 can move up and down synchronously. In this way, the limiting ring 47 can drive the rotating stirring blade 45 to move up and down. Thus, during the rotation of the stirring blade 45, the stirring blade 45 is driven to move up and down reciprocally, thereby forming a spiral upward flow field in the middle region of the reaction cylinder 1. Combined with the natural settling of fuel oil under gravity and the diffusion of catalyst added by the feed pipe 11, the superposition effect of rotational shearing and axial vibration strengthens the turbulent disturbance of the oil-solid interface, significantly improving the catalyst dispersion uniformity and mixing efficiency.
[0049] In a preferred embodiment, such as Figure 4 and Figure 5As shown, a limiting groove is also provided on the outer wall of the rotating shaft 41. One end of the connecting rod 44 is movably engaged with the inner wall of the limiting groove. The limiting groove guides the movement of the connecting rod 44. A movable groove is also provided on the limiting rod 46. The limiting ring 47 is movably disposed in the movable groove, and the groove supports the limiting ring 47. The limiting groove and the movable groove allow the stirring blade 45 to move up and down while rotating, thereby increasing the stirring range and improving the stirring, fusion, and catalytic effect.
[0050] In a preferred embodiment, such as Figure 2 and Figure 5 As shown, the end of the limiting rod 46 away from the limiting ring 47 is engaged in a groove on the inner wall of the reaction cylinder 1. This allows the limiting rod 46 to move vertically up and down along the groove under the guidance of the cam groove 42 and the limiting action of the groove when the rotating shaft 41 rotates. Simultaneously, as the limiting rod 46 moves vertically up and down along the groove, it drives the limiting ring 47 to move vertically up and down. At this time, under the action of the limiting groove on the connecting rod 44 and the rotating shaft 41, the limiting ring 47 and the stirring blade 45 can rotate horizontally with the rotating shaft 41, thus stirring the fuel oil.
[0051] The implementation principle of the fuel oil desulfurization device described in this embodiment is as follows:
[0052] During desulfurization, fuel oil is first introduced into the reaction cylinder 1 through the feed pipe 11 at the top. The fuel oil flows onto the baffle 35 and is then filtered through the filter holes 36 on the baffle 35, removing metal impurities and preventing them from affecting subsequent desulfurization. After filtration, the motor 32 is started, and its output drives the cleaning scraper 34 to rotate. The rotation of the cleaning scraper 34 scrapes away any remaining metal impurities filtered through the filter holes 36 on the baffle 35. The scraped metal impurities then move to one end of the baffle 35 located in the discharge trough 37, and are then discharged through the discharge trough. The feed trough 37 causes metal impurities to fall downwards, eventually landing inside the collection frame 310, thus completing the collection of metal impurities. When it is necessary to centrally process the collected metal impurities, the handle can be pulled outwards to move the collection frame 310 outwards. At this time, the collection frame 310 can move the slide bar 39 along the inner wall of the mounting groove 38 until the outer wall of the slide bar 39 is completely detached from the inner wall of the mounting groove 38. Then, the collection frame 310 can be disassembled from the reaction cylinder 1, and the collected metal impurities can be centrally processed. This prevents the filtered metal impurities from clogging the filter holes 36 and affecting the subsequent filtration effect.
[0053] The filtered fuel oil flows to the middle of the reaction cylinder 1, while the catalyst is added through the feed port 13 on the outer wall of the reaction cylinder 1. When the motor 32 is started, it drives the rotating shaft 41 and the cam groove 42 to rotate. The rotation of the rotating shaft 41 drives the stirring blade 45 to rotate via the connecting rod 44. The rotation of the stirring blade 45 mixes the fuel oil and the catalyst. Simultaneously, during the rotation of the cam groove 42, the protrusion 43 is limited by the limiting rod 46 and moves up and down reciprocally. This movement of the protrusion 43 drives the limiting ring 47 to move up and down, which in turn drives the rotating stirring blade 45 to move up and down. This reciprocating motion of the stirring blade 45 during rotation ensures that the stirring blade 45 effectively mixes the fuel oil and the catalyst, thereby improving the desulfurization effect.
[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.
Claims
1. A fuel oil desulfurization device, comprising a reaction cylinder (1) and a support leg (2) disposed at the bottom end of the reaction cylinder (1), characterized in that, The reaction cylinder (1) is equipped with a filtration and cleaning mechanism (3) and a stirring mechanism (4); The filtration and cleaning mechanism (3) includes a partition (35) disposed inside the reaction cylinder (1). The partition (35) divides the inner cavity of the reaction cylinder (1) into a pretreatment chamber and a reaction chamber. The pretreatment chamber is located on the upper side of the partition (35) and is connected to the reaction chamber through a number of filter holes (36) disposed on the partition (35). The stirring mechanism (4) includes a rotating shaft (41) rotatably disposed inside the reaction cylinder (1), and a stirring blade (45) is provided on the rotating shaft (41).
2. The fuel oil desulfurization device as described in claim 1, characterized in that, The filter cleaning mechanism (3) also includes a motor (32) installed on the reaction cylinder (1). A baffle (33) is provided on the lower side of the top plate of the reaction cylinder (1). The output end of the motor (32) passes through the baffle (33) and is in contact with the cleaning scraper (34). The cleaning scraper (34) is in contact with the upper surface of the partition (35).
3. The fuel oil desulfurization device as described in claim 1, characterized in that, The filter cleaning mechanism (3) also includes a plurality of feeding troughs (37) disposed on the side of the partition (35) away from the filter hole (36). The filter hole (36) and the feeding troughs (37) are symmetrically disposed on both sides of the center of the partition (35). The feeding troughs (37) are strip-shaped structures, and the width of the feeding troughs (37) gradually increases outward from the center of the partition (35).
4. The fuel oil desulfurization device as described in claim 3, characterized in that, The reaction cylinder (1) is also provided with a through hole on its side wall. A collection frame (310) is movably arranged in the through hole. The collection frame (310) is located below the partition (35) where the feed trough (37) is located. A slide bar (39) is provided at the bottom of the collection frame (310) and is slidably connected to the mounting slide groove (38) opened at the bottom of the through hole.
5. A fuel oil desulfurization device as described in claim 1, characterized in that, The stirring mechanism (4) also includes a cam groove (42) opened on the outer wall of the rotating shaft (41), a protrusion (43) is movably arranged in the cam groove (42), a limit rod (46) is provided at the other end of the protrusion (43), and a limit ring (47) is movably arranged on the upper side of the limit rod (46); a connecting rod (44) is also movably arranged on one side of the rotating shaft (41), and the end of the connecting rod (44) away from the rotating shaft (41) is connected to the stirring blade (45).
6. A fuel oil desulfurization device as described in claim 5, characterized in that, The limiting ring (47) is movably sleeved on the outside of the rotating shaft (41) and is connected to both the connecting rod (44) and the stirring blade (45).
7. A fuel oil desulfurization device as described in claim 5, characterized in that, A limiting groove is also provided on the outer wall of the rotating shaft (41), and one end of the connecting rod (44) is movably engaged in the limiting groove.
8. A fuel oil desulfurization device as described in claim 5, characterized in that, The end of the limiting rod (46) away from the limiting ring (47) is engaged in a groove on the inner wall of the reaction cylinder (1), and a movable sliding groove is also provided on the limiting rod (46), and the limiting ring (47) is movably disposed in the movable sliding groove.
9. A fuel oil desulfurization device as described in claim 1, characterized in that, The reaction cylinder (1) is also provided with a feed pipe (11) and a discharge pipe (12). The feed pipe (11) is located on the upper side of the feed inlet of the pretreatment chamber and is connected to the top wall of the reaction cylinder (1). The discharge pipe (12) is located in the middle of the conical shell at the lower end of the reaction cylinder (1) and is connected to the reaction chamber.
10. A fuel oil desulfurization device as described in claim 1, characterized in that, A feeding port (13) is also provided on one side wall of the reaction cylinder (1) where the reaction chamber is located.