Desulfurization device and method for natural gas processing

Abstract

The present invention belongs to the field of natural gas purification technology, and in particular relates to a desulfurization device and method for natural gas processing, comprising a slurry box, a mixer, and a disc filter. A plurality of scraper boxes connected to the slurry box are evenly distributed axially on one side of the slurry box, and a collection box is provided on one side of the slurry box. The mixer includes a stirring claw, and support seats are provided on the upper ends of both sides of the slurry box. The upper ends of the support seats are rotatably connected to a swing rod, and the middle section of the swing rod is provided with an arc-shaped avoidance portion. The ends of the two swing rods are connected by a stirring shaft, and the stirring shaft is evenly distributed along the axial direction with a plurality of stirring claw assemblies. The stirring claw assemblies are respectively provided between two adjacent filter discs. A filter chamber and an inspection chamber are provided in the slurry box, and the filter disc is provided in the filter chamber. The swing rod can be rotated to swing the stirring claw into the filter chamber or the inspection chamber. Stirring and filtration can be performed online, and maintenance operations of the stirring mechanism can be performed online at the same time, ensuring efficient operation of the filtration equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of natural gas purification, and in particular relates to a desulfurization device and method for natural gas processing. Background Art

[0002] Complex iron refers to a complex formed by iron ions and organic ligands. Complex iron has a variety of applications, particularly in industrial processes such as the removal of hydrogen sulfide (H2S) from natural gas. For example, in wet oxidation to remove hydrogen sulfide, complex iron acts as a catalyst, directly converting H2S into elemental sulfur while simultaneously being reduced to low-valent ferrous ions during the reaction. This can then be oxidized back to high-valent ferric ions upon contact with oxygen in the air, creating a recycling process.

[0003] During the regeneration process of natural gas desulfurization with complex iron, the generated elemental sulfur (S) is usually suspended in the solution in the form of tiny particles and can be separated from the solution by physical methods such as mechanical filtration and centrifugal separation.

[0004] In the prior art, vacuum filtration equipment is used to filter sulfur slurry to achieve solid-liquid separation. When the vacuum filter is filtering, the filter disc set inside filters out impurities, and the impurities are adsorbed on the filter disc to form a filter cake. As the filter disc rotates, the filter cake is rotated to the scraping station for scraping and unloading. However, due to the high concentration of sulfur slurry and the large amount of impurities, including impurities with various particle diameters, a stirring mechanism needs to be set to stir evenly in order to achieve uniform adsorption and filtration of the filter disc. Existing vacuum filters can only set the stirring mechanism inside the vacuum filtration equipment, which is located at the bottom of the filter disc during operation. Therefore, the operating status of the stirring mechanism cannot be monitored online. Once the stirring mechanism fails, the vacuum equipment can only be shut down and disassembled for maintenance, which is cumbersome to operate, increasing the workload of the staff and further reducing the filtration performance. Summary of the Invention

[0005] In response to the technical problems existing in the background technology, the present invention provides a desulfurization device and method for natural gas processing.

[0006] To achieve the above objectives, the technical solution provided by the present invention is:

[0007] A desulfurization device for natural gas processing, comprising a slurry box, a mixer and a disc filter, wherein the disc filter comprises a core shaft assembly and a plurality of filter discs uniformly distributed along the axial direction of the core shaft assembly, the core shaft assembly is rotatably arranged on the slurry box, and the filter discs are partially arranged inside the slurry box; a plurality of scraper boxes connected to the slurry box are uniformly distributed axially on one side of the slurry box, the filter discs are respectively arranged in the scraper boxes, a collection box is provided on one side of the slurry box, and the collection box is arranged on the outside of the scraper box; the mixer comprises a support seat, a swing arm and a stirring claw assembly, the slurry box A support seat is provided on the upper end of both sides of the liquid tank, and the upper end of the support seat is rotatably connected to a rocker arm. The middle section of the rocker arm is provided with an arc-shaped avoidance portion. The ends of the two rocker arms are connected by a stirring shaft. The stirring shaft is provided on the outside of the filter disc. The stirring shaft is evenly distributed with a number of stirring claw assemblies along the axial direction, and the stirring claw assemblies are respectively provided between two adjacent filter discs; a filter chamber and an inspection chamber are provided in the slurry box, and the inspection chamber is provided on the opposite side of the scraper box. The filter disc is provided in the filter chamber, and the rocker arm can be rotated to swing the stirring claw assembly into the filter chamber or the inspection chamber.

[0008] Optionally, the mixer includes a connecting rod assembly with a telescopic adjustable length, a stirring motor, a driving shaft, a bearing seat and a crank, a support plate is provided above one side of the two support seats, and bearing seats are provided on the upper ends of both sides of the support plate; the two sides of the driving shaft are rotatably provided on the bearing seats, and a stirring motor is provided on the support plate, and the stirring motor is connected to the driving shaft for transmission; the two ends of the driving shaft are respectively connected to cranks, one end of the crank is hinged to the connecting rod assembly, and the other end of the connecting rod assembly is hinged to the rocker arm.

[0009] Optionally, the connecting rod assembly includes connecting rod 1 and connecting rod 2, one end of connecting rod 1 is hinged to the rocker arm, connecting rod 2 is slidably set on the inner wall of connecting rod 1, and one end of connecting rod 2 is hinged to the crank; a hydraulic cylinder is provided on connecting rod 1, and the piston rod of the hydraulic cylinder is connected to connecting rod 2.

[0010] Optionally, a plurality of avoidance grooves are evenly distributed along the axial direction on the inner side of the support plate, and the filter discs are correspondingly arranged in the avoidance grooves.

[0011] Optionally, the stirring claw assembly includes a plurality of stirring claws, which are arranged at fixed angles, and the lengths of the stirring claws increase in sequence, wherein the stirring claw with the shortest length is arranged on the side where the scraper box is located.

[0012] Optionally, the stirring claw is configured as a rectangular plate, and a through groove is provided on the inner side of the stirring claw.

[0013] The filter press is connected with the filter press of the filter press, and the filter press is connected with the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press of the filter press

[0014] Optionally, a first mounting groove is provided on the bottom side of the support seat, and a first positioning ring and a second positioning ring are respectively provided on both sides of the upper end of the slurry box, one of the mounting shafts is connected to the drive motor for transmission, and the output shaft of the drive motor is rotatably provided in the second positioning ring, and the air supply cylinder is fixedly provided in the first positioning ring; the first positioning ring and the second positioning ring are provided in the first mounting groove.

[0015] Optionally, the support seat is configured as an inverted T-shape, and a second mounting groove and a third mounting groove are sequentially opened inside the support seat from top to bottom, and the rocker arm is arranged in the second mounting groove and the third mounting groove.

[0016] A desulfurization method for natural gas processing comprises the following steps: introducing sulfur slurry into a slurry tank, driving a swing arm to swing a stirring claw into a filter chamber, and simultaneously activating a vacuum device to generate a vacuum in a filter disc for filtration, thereby forming a filter cake on the filter disc; during filtration, reciprocatingly driving the swing arm to swing in the filter chamber, thereby driving the stirring claw assembly to stir;

[0017] After filtration is completed, the filter disc is controlled to rotate so that the filter cake adsorbed on the filter disc is rotated to the scraper box for scraping. At the same time, the air supply from the intake pipe is used to backflush and clean the scraped filter disc. When the stirring claw assembly needs to be replaced or repaired, the length of the connecting rod assembly is adjusted to drive the swing arm to move the stirring claw away from the filter disc and swing it into the maintenance chamber.

[0018] The present invention has the following advantages and beneficial effects:

[0019] In the present invention, the stirring claw assembly is arranged on the bottom side of the slurry box, and the stirring claw assembly is arranged between the filter discs, which can fully stir and improve the slurry disturbance between the filter discs, ensure the filtration efficiency of the filter discs, and ensure that the thickness of the filter cake adsorbed on each filter disc is uniform. By driving the rocker arm to swing the stirring claw into the filter chamber or the maintenance chamber, stirring and filtering can be performed online. At the same time, the stirring mechanism can be moved to the filter disc online, the operating status of the stirring mechanism can be monitored online, and the stirring mechanism can be repaired online. This structure allows the entire vacuum filtration equipment, especially the disc filter, to be compactly arranged with a stirring mechanism to ensure efficient operation of the filtration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the structural diagrams of the desulfurization device in the present invention in the stirring and filtering state;

[0021] Figure 2 This is the second structural diagram of the desulfurization device in the present invention in the stirring and filtering state;

[0022] Figure 3 for Figure 2 Front view of

[0023] Figure 4 for Figure 3 Left view of;

[0024] Figure 5 for Figure 4 Cross-sectional view along AA direction;

[0025] Figure 6 This is a structural diagram of the mixer and disc filter in the present invention in a stirring and filtering state;

[0026] Figure 7 for Figure 6 A local enlarged view of point a in the middle;

[0027] Figure 8 It is a structural diagram of the disc filter in the present invention;

[0028] Figure 9 for Figure 8 Front view of

[0029] Figure 10 This is a structural diagram of the desulfurization device in the present invention in a filtering and maintenance state;

[0030] Figure 11 It is a cross-sectional view of the desulfurization device of the present invention in a filtering and maintenance state;

[0031] Figure 12 This is a structural diagram of the mixer and disc filter in the present invention in a filtering maintenance state;

[0032] Figure 13 for Figure 12 A partial enlarged view of point b in the middle;

[0033] Figure 14 This is one of the structural diagrams of the mixer in the present invention;

[0034] Figure 15 for Figure 14 A partial enlarged view of point c in the middle;

[0035] Figure 16 This is the second structural diagram of the mixer in the present invention;

[0036] Figure 17 for Figure 16 Front view of

[0037] Figure 18 for Figure 17 Left view of;

[0038] Figure 19 This is a structural diagram of the stirring claw assembly of the present invention;

[0039] Figure 20 It is an isometric half-section view of the disc filter and the air supply cylinder of the present invention;

[0040] Figure 21 for Figure 20 A partial enlarged view of the middle part of the structure.

[0041] Figure numerals: 1-cylinder, 11-positioning block, 12-filter disc, 13-external air pipe, 14-mounting shaft, 2-air supply cylinder, 21-exhaust pipe, 22-positioning pipe, 23-inlet pipe, 24-slider, 25-turntable, 26-ring groove, 27-limit cylinder, 3-slurry box, 3a-filter chamber, 3b-collection chamber, 3c-inspection chamber, 31-scraper box, 32-collection box, 33-motor base, 34-first positioning ring, 35-second positioning ring, 4-support base, 41-first mounting groove, 42-third mounting groove, 43-column, 44-second mounting groove, 5-rocker, 51-avoidance part, 511-rotating shaft, 52-connecting rod 1, 521-connecting seat, 53-connecting rod 2, 54-U-shaped seat, 55-pin shaft, 6-stirring shaft, 61-stirring claw assembly, 611-first stirring claw, 612-second stirring claw, 613-third stirring claw, 614-mounting cylinder, 615-through groove, 7-hydraulic cylinder, 71-piston rod, 72-connecting head, 73-articulated seat, 8-stirring motor, 81-drive shaft, 82-crank, 83-support plate, 84-bearing seat, 85-avoidance groove, 9-drive motor, 91-output shaft. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0044] Example 1

[0045] like Figures 1 to 21 As shown, a desulfurization device for natural gas processing includes a slurry tank 3, a mixer, a disc filter, etc.

[0046] like Figures 1 to 9 As shown, the disc filter includes a core shaft assembly and a plurality of filter discs 12 evenly distributed along the axis of the core shaft assembly. The core shaft assembly is rotatably mounted on a slurry tank 3, and the filter discs 12 are partially disposed within the slurry tank 3, meaning that only the lower half of the filter discs 12 are immersed in the sulfur slurry. A plurality of scraper boxes 31 are evenly distributed axially on one side of the slurry tank 3 and are connected to the slurry tank 3. The number and position of the scraper boxes 31 correspond one-to-one with the filter discs 12, and the filter discs 12 are respectively disposed within the scraper boxes 31. When the filter discs 12 rotate, the filter cake on the surface of the filter discs 12 comes into contact with the scraper boxes 31, thereby scraping the filter cake from the surface of the filter discs 12. A collection box 32 is provided on one side of the slurry tank 3. The collection box 32 contains a collection chamber 3b. The collection box 32 is disposed outside the scraper box 31, and the material scraped by the scraper boxes 31 is collected in the collection box 32.

[0047] like Figures 1 to 9 As shown, the mixer includes a support base 4, a swing rod 5 and a stirring claw assembly 61. The upper ends of the slurry box 3 are respectively provided with support bases 4, and the upper end of the support base 4 is provided with a column 43. The upper end column 43 of the support base 4 is rotatably connected to the swing rod 5. The middle section of the swing rod 5 is provided with an arc-shaped avoidance portion 51. The ends of the two swing rods 5 are connected by a stirring shaft 6. The stirring shaft 6 is provided on the outside of the filter disc 12 (as shown in FIG. Figure 6 As shown), when the stirring shaft 6 swings, it will not collide with the filter disc 12. The stirring shaft 6 has a number of stirring claw assemblies 61 evenly distributed along the axial direction. The stirring claw assemblies 61 are respectively arranged between two adjacent filter discs 12 to fully stir and disturb the slurry between the filter discs 12. Figure 5As shown, a filter chamber 3a and an inspection chamber 3c are provided in the slurry box 3. The inspection chamber 3c is almost circular and coaxial with the filter disc 12. The filter chamber 3a extends upward in an arc to one side, that is, the inspection chamber 3c is located on one side of the filter disc 12, and the inspection chamber 3c is provided on the opposite side of the scraper box 31. The filter disc 12 is provided in the filter chamber 3a, and the rocker arm 5 can rotate to make the stirring claw assembly 61 swing into the filter chamber 3a or the inspection chamber 3c.

[0048] Reference Figure 5 In the present invention, the hinge point between the swing arm 5 and the column 43 is located at the upper end of the core shaft assembly, and the swing arm 5 is hinged to the column 43 through the rotating shaft 511. Therefore, when the swing arm 5 swings, it only swings a fixed angle at the bottom side of the slurry tank 3. Figure 5 As shown, at this time, the stirring claw assembly 61 swings to the left to the farthest end of the stirring position. Similarly, when the rocker arm 5 swings to the right, the stirring claw assembly 61 can swing to the side wall of the scraper box 31 at the farthest. When the rocker arm 5 swings to the right, the avoidance portion 51 can avoid contact and collision with the core shaft assembly.

[0049] like Figures 10 and 11 As shown, at this time, the stirring claw assembly 61 swings to the left to the farthest end of the maintenance position. The stirring claw assembly 61 can swing as far as the maintenance cavity 3c, so that the stirring claw assembly 61 is away from the filter disc 12 and moved out from the gap between the filter discs 12, which is convenient for maintenance operations and will not affect the filtering operation of the filter disc 12.

[0050] It can be seen that the present invention can fully stir the slurry between the disc filter and the slurry box 3, and the stirring claw assembly 61 is set on the bottom side of the slurry box 3, and the stirring claw assembly 61 is set between the filter discs 12, which can fully stir and improve the slurry disturbance between the filter discs 12, ensure the filtration efficiency of the filter discs 12, and ensure that the thickness of the filter cake adsorbed on each filter disc 12 is uniform. The position of the stirring claw assembly 61 can be adjusted quickly and conveniently, and the slurry filtration and stirring can be performed online, as well as the slurry filtration and the stirring claw assembly 61 can be inspected online. By driving the rocker 5 to swing the stirring claw assembly 61 into the filter chamber 3a or the inspection chamber 3c, this structure allows the entire vacuum filtration equipment, especially the disc filter, to be compactly provided with a stirring mechanism to ensure efficient operation of the filtration equipment.

[0051] Example 2

[0052] In order to facilitate the position adjustment of the stirring claw assembly 61, further optimization design is performed.

[0053] like Figures 1 to 18As shown, the mixer includes a telescopically adjustable connecting rod assembly, a stirring motor 8, a drive shaft 81, a bearing seat 84, and a crank 82. A support plate 83 is provided above one side of the two support seats 4, and bearing seats 84 are provided on the upper ends of each side of the support plate 83. The two sides of the drive shaft 81 are rotatably mounted on the bearing seats 84. The stirring motor 8 is provided on the support plate 83, and the stirring motor 8 is connected to the drive shaft 81 for transmission. Cranks 82 are connected to both ends of the drive shaft 81. One end of the crank 82 is hinged to the connecting rod assembly, and the other end of the connecting rod assembly is hinged to the rocker arm 5. The top end of the rocker arm 5 is at a higher height than the drive shaft 81. When the stirring motor 8 is started, it drives the rocker arm 5 to swing back and forth continuously, thereby driving the stirring claw assembly 61 to swing and stir within the slurry tank 3 and between the filter discs 12.

[0054] Such a design can adjust the swing angle of the swing rod 5 by adjusting the length of the connecting rod assembly. Figure 5 At this time, the length of the connecting rod assembly is L1. At this time, when the stirring motor 8 is started, it can drive the swing rod 5 to continuously swing and stir in the slurry box 3. Figure 11 As shown, when the length of the connecting rod assembly increases, the length of the connecting rod assembly is L2, L2 is greater than L1, the stirring motor 8 stops, and the connecting rod assembly is extended to drive the rocker arm 5 to swing into the maintenance chamber 3c, so that the stirring claw assembly 61 completely leaves the filter disc 12 and reaches above the sulfur slurry level, which is convenient for maintenance and replacement operations.

[0055] like Figures 12 to 18 As shown, the connecting rod assembly further includes connecting rod 1 52 and connecting rod 2 53. One end of connecting rod 1 52 is hinged to rocker arm 5, while connecting rod 2 53 is slidably mounted on the inner wall of connecting rod 1 52 and one end of connecting rod 2 53 is hinged to crank 82. Connecting rod 1 52 is provided with a hydraulic cylinder 7, and its piston rod 71 is connected to connecting rod 2 53. The length of the connecting rod assembly can be adjusted hydraulically to quickly adjust the swing position of rocker arm 5. This allows the position of stirring claw assembly 61 to be quickly adjusted to maintain a stirring state or a maintenance state while filter disc 12 is filtering. Furthermore, since the connecting rod assembly (connecting rod 1 52 and connecting rod 2 53) swings, it moves only within a limited space. Therefore, after the hydraulic cylinder 7 is provided, it will only swing within a small range with the connecting rod assembly, without affecting the operational stability of the hydraulic cylinder 7.

[0056] Reference Figure 13 As shown, a connector 72 is provided at one end of the piston rod 71, a U-shaped seat 54 is fixed on the connecting rod 53, a pin 55 is provided on the U-shaped seat 54, and the connector 72 is rotatably provided on the pin 55. Figure 15As shown, one end of the piston rod 71 is hinged to the hinge seat 73, and a connecting seat 521 is provided on the connecting rod 52. The connecting seat 521 and the hinge seat 73 are detachably connected by bolts.

[0057] like Figure 12 and Figure 13 As shown, the inner side of the support plate 83 is uniformly distributed along the axial direction with a plurality of escape grooves 85. The escape grooves 85 are respectively provided in correspondence with the scraper box 31, and the filter discs 12 are respectively disposed in the escape grooves 85. The width of the escape grooves 85 needs to be wide enough so that after the filter discs 12 adsorb and form filter cakes, they will not collide with the escape grooves 85 and cause the filter cake to be scraped off. The design of the escape grooves 85 also allows the filtration performance of each filter disc 12 to be determined by the distance between the escape grooves 85 and the filter cake, and to determine whether the thickness of the filter cake adsorbed on each filter disc 12 is uniform.

[0058] Example 3

[0059] In order to further increase the stirring efficiency, the structure of the stirring claw assembly 61 is optimized.

[0060] like Figures 16 to 19 As shown, the stirring claw assembly 61 includes a plurality of stirring claws, which are arranged at fixed angles. Preferably, in the present invention, each stirring claw assembly 61 is provided with three stirring claws, namely a first stirring claw 611, a second stirring claw 612, and a third stirring claw 613. The first stirring claw 611, the second stirring claw 612, and the third stirring claw 613 are all fixedly mounted on a mounting cylinder 614, which is detachably connected to the stirring shaft 6. The angle between the first stirring claw 611 and the third stirring claw 613 is approximately 85-95 degrees, and the lengths of the plurality of stirring claws increase in sequence, with the shortest stirring claw being arranged on the side where the scraper box 31 is located. That is, the first stirring claw 611 is arranged on the side where the scraper box 31 is located.

[0061] like Figure 5 As shown, the lengths of several stirring claws increase in sequence, among which the stirring claw with the shortest length is set on the side of the scraper box 31, that is, the first stirring claw 611 is short in length, so when swinging, it will not collide with the inner wall of the scraper box 31, and the lengths of the remaining stirring claws increase in sequence, which can increase the space for stirring disturbance and increase stirring efficiency. However, the third stirring claw 613, that is, the longest stirring claw, needs to ensure that it does not contact the outer wall of the cylinder 1 during the rotation and swinging process, and ensure that it is always swinging and stirring between the two filter discs 12. The structural arrangement of this stirring claw assembly 61 fully considers the position of the filter chamber 3a, the inspection chamber 3c and the scraper box 31, which can avoid interference and collision and increase stirring efficiency.

[0062] like Figure 11As shown, when the stirring claw assembly 61 rotates to the maintenance chamber 3c, the third stirring claw 613 rotates to the outside of the slurry box, and the first stirring claw 611 rotates to a nearly horizontal position. At this time, the first stirring claw 611 is located above the liquid level, and maintenance operations can be performed. It should be noted that since the arc-shaped avoidance portion 51 is provided on the rocker arm 5, its existence is to avoid the core shaft assembly when the rocker arm 5 rotates. When the stirring claw assembly 61 is located in the maintenance chamber 3c, the upper end of the avoidance portion 51 approaches or contacts the connecting rod assembly to achieve position limiting; at the same time, the lower end of the avoidance portion 51 approaches or contacts the inner wall of the support plate 83 to achieve position limiting, thereby achieving double mechanical position limiting.

[0063] like Figure 19 As shown, further, the stirring claw is configured as a rectangular plate, and a through groove 615 is opened on the inner side of the stirring claw.

[0064] Example 4

[0065] like Figures 1 to 3 、 Figure 8 、 Figure 9 、 Figure 20 and Figure 21 As shown, the core shaft assembly includes a cylinder 1 and mounting shafts 14 arranged on both sides of the cylinder 1. Several positioning blocks 11 are evenly distributed around the circumference of the cylinder 1, each of which is provided with a slot. The filter discs 12 are arranged in a fan shape, and the multiple filter discs 12 can be arranged in a 360-degree ring. The filter discs 12 are detachably connected to two adjacent positioning blocks 11. A turntable 25 is connected to the end of one of the mounting shafts 14. Specifically, a limit cylinder 27 is provided on one side of the turntable 25, and the limit cylinder 27 is fixedly connected to the mounting shaft 14. A turntable 25 is rotatably mounted on the inner wall of the air supply cylinder 2. An exhaust pipe 21 and a positioning pipe 22 are provided at one end of the air supply cylinder 2. An air inlet pipe 23 is provided on the inner wall of the positioning pipe 22. The air inlet pipe 23 extends into the air supply cylinder 2. An annular groove 26 is provided on one side of the turntable 25. The annular groove 26 is located inside the air supply cylinder 2. An arc-shaped slider 24 is provided at the end of the air inlet pipe 23. A through hole is provided at the end of the slider 24, which is connected to the air inlet pipe 23. The slider 24 is slidably mounted in the annular groove 26. A plurality of external air pipes 13 connected to the annular groove 26 are evenly arranged on the outer circumference of the turntable 25. The external air pipes 13 extend along the length of the cylinder 1 and are connected to corresponding filter discs 12. The air supply cylinder 2 is fixed to the upper side of the slurry box 3, and the air inlet pipe 23 is provided on the side where the scraper box 31 is located.

[0066] In this structure, the air supply cylinder 2 is fixed. During the rotation of the filter disc 12, the turntable 25 also rotates relative to the air supply cylinder 2. Except for the external air pipe 13 corresponding to the air inlet pipe 23, the other external air pipes 13 are all exhausted. In this way, vacuum filtration of the filter disc 12 can be achieved, and suction filtration within the slurry and suction dehydration above the slurry can be achieved. When the filter disc 12 rotates to the position of the scraper box 31, the external air pipe 13 corresponding to the filter disc 12 is connected to the air inlet pipe 23, so that air is supplied for purging, and the filter cake on the filter disc 12 is blown off, and the scraper box 31 is used for easy unloading. In addition, because the slider 24 has a certain length, it is always connected to the external air pipe 13 within a certain rotation angle, ensuring that the filter disc 12 is continuously purged within the rotation time of a certain angle. For example, in the present invention, the annular filter disc 12 is composed of 12 fan-shaped filter discs 12. Then, the angle at which each filter disc 12 needs to rotate for scraping is 30 degrees. Therefore, here, the length of the slider 24 can be limited so that within the range of 30 degrees of rotation of the turntable 25, the external air pipe 13 corresponding to the filter disc 12 in the unloading state is always connected to the slider 24 for purging.

[0067] Furthermore, a first mounting groove 41 is provided on the bottom side of the support base 4, and a first positioning ring 34 and a second positioning ring 35 are provided on both sides of the upper end of the slurry tank 3. One of the mounting shafts 14 is connected to the output shaft 91 of the drive motor 9 for transmission. The output shaft 91 of the drive motor 9 is rotatably disposed within the second positioning ring 35, and the air supply cylinder 2 is fixedly disposed within the first positioning ring 34; the first positioning ring 34 and the second positioning ring 35 are disposed within the first mounting groove 41. The rotation of the filter disc 12 is controlled by the drive motor 9. The drive motor 9 is fixedly mounted on the motor base 33, which is fixedly mounted on one side outer wall of the slurry tank 3.

[0068] Furthermore, the support seat 4 is configured to be an inverted T-shape, and a second mounting groove 44 and a third mounting groove 42 are sequentially opened inside the support seat 4 from top to bottom. The second mounting groove 44 is arranged on one side of the column 43, and the rocker arm 5 is arranged in the second mounting groove 44 and the third mounting groove 42 to limit the swing of the rocker arm 5.

[0069] Example 5

[0070] A desulfurization method for natural gas processing comprises the following steps:

[0071] Sulfur slurry is introduced into the slurry box 3, and the rocker arm 5 is driven to swing the stirring claw into the filter chamber 3a. At the same time, the vacuum device is started to generate a vacuum in the filter disc 12 for filtration, and a filter cake is formed on the filter disc 12. During the filtration period, the rocker arm 5 is reciprocatingly driven to swing in the filter chamber 3a, driving the stirring claw assembly 61 to stir the slurry between the filter discs 12.

[0072] After the filtration is completed, the filter disc 12 is controlled to rotate so that the filter cake adsorbed on the filter disc 12 is rotated to the scraper box 31 for scraping. At the same time, the air inlet pipe 23 supplies air to back-blow and clean the scraped filter disc 12; when the stirring claw assembly 61 needs to be replaced or repaired, the length of the connecting rod assembly is adjusted, and the rocker arm 5 is driven to make the stirring claw move away from the filter disc 12 and swing into the maintenance chamber 3c.

[0073] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A desulfurization device for natural gas processing, comprising a slurry tank, a mixer, and a disc filter, wherein the disc filter comprises a core shaft assembly and a plurality of filter discs uniformly distributed along the axial direction of the core shaft assembly, characterized in that: The core shaft assembly is rotatably arranged on the slurry box, and the filter disc portion is arranged inside the slurry box; a plurality of scraper boxes connected to the slurry box are axially evenly distributed on one side of the slurry box, and the filter discs are respectively arranged in the scraper boxes; a collection box is provided on one side of the slurry box, and the collection box is arranged on the outside of the scraper box, and the material scraped by the scraper box is collected in the collection box; The mixer includes a support base, a rocker arm and a stirring claw assembly. The upper ends of both sides of the slurry box are respectively provided with support bases. The upper end of the support base is rotatably connected to the rocker arm. The middle section of the rocker arm is provided with an arc-shaped avoidance portion. The ends of the two rocker arms are connected by a stirring shaft. The stirring shaft is provided on the outside of the filter disc. The stirring shaft is evenly distributed with a plurality of stirring claw assemblies along the axial direction. The stirring claw assemblies are respectively provided between two adjacent filter discs. The slurry box is provided with a filter chamber and an inspection chamber, the inspection chamber is provided on the opposite side of the scraper box, the filter disc is provided in the filter chamber, and the swing arm can rotate to swing the stirring claw assembly into the filter chamber or the inspection chamber; The mixer includes a connecting rod assembly with a retractable length adjustment, a stirring motor, a drive shaft, a bearing seat and a crank. A support plate is provided above one side of the two support seats, and the upper ends of both sides of the support plate are respectively provided with bearing seats; The two ends of the drive shaft are rotatably arranged on the bearing seat, and the support plate is provided with a stirring motor, which is connected to the drive shaft for transmission; the two ends of the drive shaft are respectively connected to a crank, one end of the crank is hinged to the connecting rod assembly, and the other end of the connecting rod assembly is hinged to the rocker arm; The connecting rod assembly includes connecting rod 1 and connecting rod 2, one end of connecting rod 1 is hinged to the rocker arm, and connecting rod 2 is slidably set on the inner wall of connecting rod 1, and one end of connecting rod 2 is hinged to the crank; a hydraulic cylinder is provided on connecting rod 1, and the piston rod of the hydraulic cylinder is connected to connecting rod 2.

2. The desulfurization device for natural gas processing according to claim 1, characterized in that: The inner side of the support plate is evenly distributed with a plurality of avoidance grooves along the axial direction, and the filter discs are respectively arranged in the avoidance grooves.

3. The desulfurization device for natural gas processing according to claim 1, characterized in that: The stirring claw assembly includes a plurality of stirring claws, which are arranged at fixed angles, and the lengths of the stirring claws increase in sequence, wherein the stirring claw with the shortest length is arranged on the side where the scraper box is located.

4. The desulfurization device for natural gas processing according to claim 3, characterized in that: The stirring claw is configured as a rectangular plate, and a through groove is provided on the inner side of the stirring claw.

5. The desulfurization device for natural gas processing according to claim 3, characterized in that: The core shaft assembly includes a cylinder and mounting shafts arranged on both sides of the cylinder. A plurality of positioning blocks are evenly distributed on the circumference of the cylinder. The filter disc is arranged in a fan shape and is detachably connected to two adjacent positioning blocks. The end of one of the mounting shafts is connected to a turntable, which is rotatably arranged on the inner wall of the air supply cylinder; one end of the air supply cylinder is provided with an exhaust pipe and a positioning pipe, the inner wall of the positioning pipe is provided with an air intake pipe, and the air intake pipe extends into the air supply cylinder; one side of the turntable is provided with an annular groove, the end of the air intake pipe is provided with an arc-shaped slider, the end of the slider is provided with a through hole connected to the air intake pipe, and the slider is slidably arranged in the annular groove; the outer circumference of the turntable is evenly provided with a number of external air pipes connected to the annular groove, the external air pipes extend along the length direction of the cylinder and are connected to the corresponding filter discs; the air supply cylinder is fixed on the upper side of the slurry box, and the air intake pipe is provided on the side where the scraper box is located.

6. The desulfurization device for natural gas processing according to claim 5, characterized in that: A first mounting groove is provided on the bottom side of the support seat, and a first positioning ring and a second positioning ring are respectively provided on both sides of the upper end of the slurry box. One of the mounting shafts is connected to the output shaft of the driving motor for transmission, and the output shaft is rotatably arranged in the second positioning ring. The air supply cylinder is fixedly arranged in the first positioning ring; the first positioning ring and the second positioning ring are arranged in the first mounting groove.

7. The desulfurization device for natural gas processing according to claim 5, characterized in that: The support seat is configured as an inverted T-shape, and a second mounting groove and a third mounting groove are sequentially opened inside the support seat from top to bottom, and the rocker arm is configured in the second mounting groove and the third mounting groove.

8. A method for desulfurization using the desulfurization device for natural gas processing according to any one of claims 5 to 7, comprising the following steps: Sulfur slurry is introduced into the slurry tank, and the swing arm is driven to swing the stirring claw into the filter chamber. At the same time, the exhaust device is started to generate a vacuum in the filter disc for filtration, and a filter cake is formed on the filter disc. During the filtration period, the swing arm is driven back and forth to swing in the filter chamber, driving the stirring claw assembly to stir. After filtration is completed, the filter disc is controlled to rotate so that the filter cake adsorbed on the filter disc is rotated to the scraper box for scraping. At the same time, the air supply from the intake pipe is used to backflush and clean the scraped filter disc. When the stirring claw assembly needs to be replaced or repaired, the length of the connecting rod assembly is adjusted to drive the swing arm to move the stirring claw away from the filter disc and swing it into the maintenance chamber.

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