Desulfurization device and method for natural gas treatment

Abstract

The invention belongs to the technical field of natural gas purification, and particularly relates to a desulfurization device and method for natural gas treatment, the desulfurization device comprises a slurry box, a stirrer and a disc filter, a plurality of scraping boxes communicated with the slurry box are axially and uniformly distributed on one side of the slurry box, and a collecting box is arranged on one side of the slurry box; the stirrer comprises stirring claws, supporting seats are arranged at the upper ends of the two sides of the slurry box respectively, swing rods are rotationally connected to the upper ends of the supporting seats, arc-shaped avoiding parts are arranged on the middle sections of the swing rods, the tail ends of the two swing rods are connected through a stirring shaft, and a plurality of stirring claw assemblies are evenly distributed on the stirring shaft in the axial direction. The stirring claw components are respectively and correspondingly arranged between two adjacent filter discs; a filter cavity and a maintenance cavity are formed in the slurry box, the filter disc is arranged in the filter cavity, and the swing rod can rotate to enable the stirring claw to swing into the filter cavity or the maintenance cavity. Stirring and filtering can be carried out on line, meanwhile, the stirring mechanism can be overhauled on line, and efficient operation of filtering equipment is ensured.

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 treatment. Background Art

[0002] Complex iron refers to a complex formed by iron ions and organic ligands. Complex iron has various applications, especially in industrial processes such as natural gas desulfurization of hydrogen sulfide (H 2 S). For example, in the method of wet oxidation desulfurization of hydrogen sulfide, complex iron is used as a catalyst, which can directly convert H 2 S into elemental sulfur, and at the same time, it is reduced to ferrous ions in the low valence state during the reaction process, and then can be oxidized back to ferric ions in the high valence state by contacting with oxygen in the air, forming a recycling process.

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

[0004] In the prior art, a vacuum filtration device is used to filter the sulfur slurry to achieve solid-liquid separation. When the vacuum filter is filtering, the filter disc arranged inside filters out impurities, and the impurities adsorb on the filter disc to form a filter cake. As the filter disc rotates, the filter cake rotates to the scraping station for scraping and unloading. However, due to the high concentration and large amount of impurities in the sulfur slurry, and the impurities with various particle diameters, a stirring mechanism needs to be set up for uniform stirring to achieve uniform adsorption and filtration of the filter disc. The existing vacuum filter can only set the stirring mechanism inside the vacuum filtration device, which is located at the bottom of the filter disc during operation. Therefore, the operating state of the stirring mechanism cannot be monitored online. Once the stirring mechanism fails, only the vacuum device can be shut down and disassembled for maintenance as a whole, which is troublesome to operate, increases the workload of the staff, and further reduces the filtration performance. Summary of the Invention

[0005] Aiming at the technical problems existing in the background art, the present invention provides a desulfurization device and method for natural gas treatment.

[0006] To achieve the above object, the technical solution provided by the present invention is as follows: A desulfurization device for natural gas treatment, comprising a slurry tank, a stirrer and a disc filter. The disc filter includes a core shaft assembly and a plurality of filter discs evenly distributed along the axial direction of the core shaft assembly. The core shaft assembly is rotatably arranged on the slurry tank, and part of the filter discs are arranged inside the slurry tank. A plurality of scraping boxes communicated with the slurry tank are evenly distributed axially on one side of the slurry tank. The filter discs are respectively arranged in the scraping boxes. A collection box is arranged on one side of the slurry tank, and the collection box is arranged outside the scraping boxes. The stirrer includes a support base, a swing rod and a stirring claw assembly. Support bases are respectively arranged at the upper ends of both sides of the slurry tank. The upper end of the support base is rotatably connected with the swing rod. An arc-shaped avoidance part is arranged in the middle section of the swing rod. The ends of the two swing rods are connected by a stirring shaft. The stirring shaft is arranged outside the filter discs. A plurality of stirring claw assemblies are evenly distributed along the axial direction of the stirring shaft. The stirring claw assemblies are respectively arranged between adjacent two filter discs. A filtering cavity and a maintenance cavity are arranged in the slurry tank. The maintenance cavity is arranged on the opposite side of the scraping boxes. The filter discs are arranged in the filtering cavity. The swing rod can rotate to swing the stirring claw assembly into the filtering cavity or the maintenance cavity.

[0007] Optionally, the stirrer includes a connecting rod assembly with adjustable telescopic length, a stirring motor, a driving shaft, a bearing seat and a crank. A support plate is arranged above one side of the two support bases. Bearing seats are respectively arranged at the upper ends of both sides of the support plate. The two sides of the driving shaft are respectively rotatably arranged on the bearing seats. A stirring motor is arranged on the support plate, and the stirring motor is connected and drives the driving shaft. Cranks are respectively connected to both ends of the driving shaft. 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 swing rod.

[0008] Optionally, the connecting rod assembly includes a first connecting rod and a second connecting rod. One end of the first connecting rod is hinged to the swing rod. The second connecting rod is slidably arranged on the inner wall of the first connecting rod. One end of the second connecting rod is hinged to the crank. A hydraulic cylinder is arranged on the first connecting rod, and the piston rod of the hydraulic cylinder is connected to the second connecting rod.

[0009] Optionally, a plurality of avoidance grooves are evenly distributed axially on the inner side of the support plate, and the filter discs are respectively arranged in the avoidance grooves.

[0010] Optionally, the stirring claw assembly includes a plurality of stirring claws. The plurality of stirring claws are arranged at fixed angles at intervals, and the lengths of the plurality of stirring claws increase in sequence. The stirring claw with the shortest length is arranged on the side where the scraping box is located.

[0011] Optionally, the stirring claw is set as a rectangular plate, and a through groove is arranged on the inner side of the stirring claw.

[0012] Optionally, the mandrel assembly includes a cylinder body and mounting shafts disposed on both sides of the cylinder body. A plurality of positioning blocks are evenly distributed on the circumference of the cylinder body. The filter disc is arranged in a sector shape and is detachably connected to two adjacent positioning blocks. One of the mounting shafts is connected to a turntable at its end, and the turntable is rotatably arranged on the inner wall of the air supply cylinder. One end of the air supply cylinder is provided with an air extraction pipe and a positioning pipe. An air inlet pipe is arranged on the inner wall of the positioning pipe, and the air inlet pipe extends into the air supply cylinder. A ring groove is arranged on one side of the turntable. The end of the air inlet pipe is provided with an arc-shaped slider, and a through hole communicating with the air inlet pipe is arranged at the end of the slider. The slider is slidably arranged in the ring groove. A plurality of external air pipes communicating with the ring groove are evenly distributed on the outer circumference of the turntable. The external air pipes extend along the length direction of the cylinder body and are communicated with the corresponding filter discs. The air supply cylinder is fixed on the upper side of the slurry tank, and the air inlet pipe is arranged on the side where the scraping box is located.

[0013] Optionally, a first installation groove is arranged on the bottom side of the support seat. First positioning rings and second positioning rings are respectively arranged on both sides of the upper end of the slurry tank. One of the mounting shafts is connected to a driving motor for transmission, and the output shaft of the driving motor 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 installation groove.

[0014] Optionally, the support seat is arranged in an inverted T shape. A second installation groove and a third installation groove are successively arranged in the support seat from top to bottom. The swing rod is arranged in the second installation groove and the third installation groove.

[0015] A desulfurization method for natural gas treatment includes the following steps: introducing sulfur slurry into the slurry tank, driving the swing rod to swing the stirring claws into the filtering cavity, and at the same time starting the air extraction device to generate a vacuum in the filter disc for filtration to form a filter cake on the filter disc; during filtration, reciprocally driving the swing rod to swing in the filtering cavity to drive the stirring claw assembly to stir; After filtration is completed, control the rotation of the filter disc so that the filter cake adsorbed on the filter disc rotates to the scraping box for scraping. At the same time, the air inlet pipe supplies air to blow and clean the scraped filter disc; when it is necessary to replace or repair the stirring claw assembly, adjust the length of the connecting rod assembly, drive the swing rod to move the stirring claws away from the filter disc and swing them into the maintenance cavity.

[0016] The present invention has the following advantages and beneficial effects: In the present invention, the stirring claw assembly is arranged at the bottom side of the slurry tank and between the filter disks, so that sufficient stirring can be carried out, the slurry disturbance between the filter disks can be enhanced, the filtration efficiency of the filter disks can be ensured, and the thickness of the filter cakes adsorbed on each filter disk can be made uniform. By driving the swing rod to swing the stirring claw into the filtration chamber or the maintenance chamber, on-line stirring filtration can be carried out. At the same time, the stirring mechanism can be displaced to give way to the filter disk, the operation state of the stirring mechanism can be monitored on-line, and the maintenance operation of the stirring mechanism can be carried out on-line. With this structure, the entire vacuum filtration device, especially the disk filter, can be provided with a stirring mechanism in a compact manner, ensuring the efficient operation of the filtration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 1 is one of the structural diagrams of the desulfurization device in the stirring filtration state according to the present invention; Figure 2 FIG. 2 is another structural diagram of the desulfurization device in the stirring filtration state according to the present invention; Figure 3 FIG. 3 is Figure 2 the front view of Figure 4 FIG. 4 is Figure 3 the left view of Figure 5 FIG. 5 is Figure 4 the sectional view taken along the A-A direction in Figure 6 FIG. 6 is the structural diagram of the mixer and the disk filter in the stirring filtration state according to the present invention; Figure 7 FIG. 7 is Figure 6 the enlarged partial view at a in Figure 8 FIG. 8 is the structural diagram of the disk filter according to the present invention; Figure 9 FIG. 9 is Figure 8 the front view of Figure 10 FIG. 10 is the structural diagram of the desulfurization device in the filtration and maintenance state according to the present invention; Figure 11 FIG. 11 is the sectional view of the desulfurization device in the filtration and maintenance state according to the present invention; Figure 12 FIG. 12 is the structural diagram of the mixer and the disk filter in the filtration and maintenance state according to the present invention; Figure 13 FIG. 13 is Figure 12 the enlarged partial view at b in Figure 14 FIG. 14 is one of the structural diagrams of the mixer according to the present invention; Figure 15 FIG. 15 is Figure 14 the enlarged partial view at c in Figure 16This is the second structural diagram of the blender in the present invention; Figure 17 is Figure 16 front view; Figure 18 is Figure 17 left view; Figure 19 This is the structural diagram of the stirring claw assembly in the present invention; Figure 20 This is an isometric half-sectional view of the disk filter and the air supply cylinder in the present invention; Figure 21 is Figure 20 partial enlarged view of some structures in;

[0018] Reference numerals: 1 - cylinder body, 11 - positioning block, 12 - filter disk, 13 - external air pipe, 14 - mounting shaft, 2 - air supply cylinder, 21 - extraction air pipe, 22 - positioning pipe, 23 - intake pipe, 24 - slider, 25 - turntable, 26 - annular groove, 27 - limiting cylinder, 3 - slurry tank, 3a - filtration chamber, 3b - collection chamber, 3c - maintenance chamber, 31 - scraping box, 32 - collection box, 33 - motor base, 34 - first positioning ring, 35 - second positioning ring, 4 - support base, 41 - first installation groove, 42 - third installation groove, 43 - column, 44 - second installation groove, 5 - swing rod, 51 - avoidance part, 511 - rotating shaft, 52 - connecting rod one, 521 - connecting seat, 53 - connecting rod two, 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 - hinge 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 implementation manners

[0019] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1 As Figures 1 to 21As shown in the figure, a desulfurization device for natural gas treatment includes a slurry tank 3, a stirrer, a disc filter, etc.

[0022] As Figures 1 to 9 shown, the disc filter includes a core shaft assembly and a number of filter discs 12 evenly distributed along the axial direction of the core shaft assembly. The core shaft assembly is rotatably arranged on the slurry tank 3, and part of the filter discs 12 are arranged inside the slurry tank 3. That is to say, only the lower half of the filter discs 12 is immersed in the sulfur slurry. A number of scraping boxes 31 communicating with the slurry tank 3 are evenly distributed axially on one side of the slurry tank 3. The number and position of the scraping boxes 31 correspond one by one to the filter discs 12. The filter discs 12 are respectively arranged in the scraping boxes 31. When the filter discs 12 rotate, the filter cakes on the surfaces of the filter discs 12 will contact the scraping boxes 31, so as to scrape the filter cakes from the surfaces of the filter discs 12. A collection box 32 is arranged on one side of the slurry tank 3. Inside the collection box 32 is a collection chamber 3b. The collection box 32 is arranged outside the scraping boxes 31, and the materials scraped by the scraping boxes 31 are collected in the collection box 32.

[0023] As Figures 1 to 9 shown, the stirrer includes a support base 4, a swing rod 5 and a stirring claw assembly 61. Support bases 4 are respectively arranged at the upper ends of both sides of the slurry tank 3. A column 43 is arranged at the upper end of the support base 4. A swing rod 5 is rotatably connected to the column 43 on the upper end of the support base 4. An arc-shaped avoidance part 51 is arranged in the middle section of the swing rod 5. The ends of the two swing rods 5 are connected by a stirring shaft 6. The stirring shaft 6 is arranged outside the filter discs 12 (as Figure 6 shown). When the stirring shaft 6 swings, it will not collide with the filter discs 12. A number of stirring claw assemblies 61 are evenly distributed along the axial direction of the stirring shaft 6. The stirring claw assemblies 61 are respectively arranged between adjacent two filter discs 12 for fully stirring and disturbing the slurry between the filter discs 12. As Figure 5 shown, a filter chamber 3a and a maintenance chamber 3c are arranged in the slurry tank 3. The maintenance chamber 3c is nearly circular and is coaxially arranged with the filter discs 12. The filter chamber 3a extends arc-shaped upward to one side. That is to say, the maintenance chamber 3c is located on one side of the filter discs 12, and the maintenance chamber 3c is arranged on the opposite side of the scraping boxes 31. The filter discs 12 are arranged in the filter chamber 3a. The swing rod 5 can rotate to make the stirring claw assembly 61 swing into the filter chamber 3a or the maintenance chamber 3c.

[0024] Referring to Figure 5 , in the present invention, the hinge point between the swing rod 5 and the column 43 is located at the upper end of the core shaft assembly. The swing rod 5 is hinged to the column 43 through a rotating shaft 511. Therefore, when the swing rod 5 swings, it only swings at a fixed angle at the bottom side of the slurry tank 3. As Figure 5As 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.

[0025] like Figures 10 to 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.

[0026] 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 arranged on the bottom side of the slurry box 3, and the stirring claw assembly 61 is arranged 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 conveniently and quickly, 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 swing rod 5 to swing the stirring claw assembly 61 into the filter chamber 3a or the inspection chamber 3c, this structure enables 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.

[0027] Example 2 In order to facilitate the position adjustment of the stirring claw assembly 61, further optimization design is performed.

[0028] like Figures 1 to 18 As shown, the mixer includes a connecting rod assembly with adjustable length, a stirring motor 8, a driving shaft 81, a bearing seat 84 and a crank 82. A support plate 83 is arranged above one side of the two supporting seats 4, and the upper ends of the two sides of the support plate 83 are respectively provided with bearing seats 84; the two sides of the driving shaft 81 are rotatably arranged on the bearing seats 84, and the stirring motor 8 is arranged on the supporting plate 83, and the stirring motor 8 is connected to the driving shaft 81 for transmission. The two ends of the driving shaft 81 are respectively connected with cranks 82, 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 swing rod 5. The height of the uppermost end of the swing rod 5 is higher than the height of the driving shaft 81. When the stirring motor 8 is started, the swing rod 5 is driven to swing back and forth continuously, thereby driving the stirring claw assembly 61 to swing and stir in the slurry box 3 and between the filter discs 12.

[0029] 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 tank 3. As Figure 11 shown, when the length of the connecting rod assembly increases, the length of the connecting rod assembly is L2 at this time, and L2 is greater than L1. The stirring motor 8 stops. By the elongation of the connecting rod assembly, the swing rod 5 is driven to swing into the maintenance cavity 3c, so that the stirring claw assembly 61 completely leaves the filter disc 12 and reaches above the sulfur slurry level, facilitating maintenance and replacement operations.

[0030] As Figures 12 to 18 shown, further, the connecting rod assembly includes a first connecting rod 52 and a second connecting rod 53. One end of the first connecting rod 52 is hinged to the swing rod 5, the second connecting rod 53 is slidably arranged on the inner wall of the first connecting rod 52, and one end of the second connecting rod 53 is hinged to the crank 82; a hydraulic cylinder 7 is arranged on the first connecting rod 52, and the piston rod 71 of the hydraulic cylinder 7 is connected to the second connecting rod 53. By hydraulic means, the length of the connecting rod assembly is adjusted, so as to quickly realize the adjustment of the swinging position of the swing rod 5 assembly, and thus when the filter disc 12 is filtering, the position of the stirring claw assembly 61 can be quickly adjusted to make it in the stirring state or in the maintenance state. Secondly, since the connecting rod assembly (the first connecting rod 52 and the second connecting rod 53) makes a swinging motion, it only moves within a limited space. Therefore, after the hydraulic cylinder 7 is arranged, the hydraulic cylinder 7 will only swing within a small range along with the connecting rod assembly, and will not affect the operation stability of the hydraulic cylinder 7.

[0031] Referring to Figure 13 shown, one end of the piston rod 71 is provided with a connector 72, a U-shaped seat 54 is fixedly arranged on the second connecting rod 53, a pin shaft 55 is arranged on the U-shaped seat 54, and the connector 72 is rotatably arranged on the pin shaft 55. Referring to Figure 15 shown, one end of the piston rod 71 is hinged to a hinge seat 73, a connecting seat 521 is arranged on the first connecting rod 52, and the connecting seat 521 and the hinge seat 73 are detachably connected by bolts.

[0032] As Figure 12 and Figure 13 shown, a plurality of avoidance grooves 85 are uniformly distributed along the axial direction on the inner side of the support plate 83, the avoidance grooves 85 and the scraping box 31 are respectively arranged in correspondence, and the filter discs 12 are respectively arranged in the avoidance grooves 85. The width of the avoidance grooves 85 needs to be wide enough so that after the filter cake is adsorbed on the filter discs 12, it will not collide with the avoidance grooves 85 and cause the filter cake to be scraped off. The design of the avoidance grooves 85 can also judge the filtering conditions of each filter disc 12 by the distance between the avoidance grooves 85 and the filter cake, and judge whether the thickness of the filter cake adsorbed on each filter disc 12 is uniform.

[0033] Embodiment 3 To further increase the stirring efficiency, the structure of the stirring claw assembly 61 is optimized.

[0034] AsFigures 16 to 19 As shown, the stirring claw assembly 61 includes a number of stirring claws, which are arranged at fixed angles at intervals. 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 arranged on the mounting cylinder 614. The mounting cylinder 614 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 several stirring claws increase in sequence. The stirring claw with the shortest length is arranged on the side where the scraping box 31 is located. That is, the first stirring claw 611 is arranged on the side where the scraping box 31 is located.

[0035] As Figure 5 shown, the lengths of the several stirring claws increase in sequence. The stirring claw with the shortest length is arranged on the side where the scraping box 31 is located, that is, the first stirring claw 611 is short in length. Therefore, when swinging, it will not collide with the inner wall of the scraping box 31. The lengths of the remaining stirring claws increase in sequence, which can increase the space for stirring and disturbance and improve the stirring efficiency. However, for the third stirring claw 613, that is, the stirring claw with the longest length, during the process of rotating and swinging, it is necessary to ensure that it does not contact the outer wall of the cylinder body 1 and ensure that it always swings and stirs between the two filter discs 12. This structural arrangement of the stirring claw assembly 61 fully considers the positions of the filtering chamber 3a, the maintenance chamber 3c and the scraping box 31, that is, it can avoid interference and collision and increase the stirring efficiency.

[0036] As Figure 11 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 tank, and the first stirring claw 611 rotates to an almost horizontal position. At this time, the first stirring claw 611 is located above the liquid level, and operations such as maintenance can be carried out. It should be noted that since an arc-shaped avoidance portion 51 is provided on the swing rod 5, its existence is to avoid the core shaft assembly when the swing rod 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 limit; 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 limit, realizing double mechanical limit.

[0037] As Figure 19 shown, further, the stirring claw is set as a rectangular plate, and a through groove 615 is opened on the inner side of the stirring claw.

[0038] Embodiment 4 As Figures 1 to 3 、 Figure 8 、 Figure 9 、 Figure 20 and Figure 21As shown in the figure, the mandrel assembly includes a cylinder body 1 and mounting shafts 14 arranged on both sides of the cylinder body 1. A number of positioning blocks 11 are evenly distributed on the circumference of the cylinder body 1. A card slot is provided on the positioning block 11. The filter disc 12 is arranged in a sector shape. A number of filter discs 12 can form a ring in 360 degrees. The filter disc 12 is detachably connected to two adjacent positioning blocks 11. One end of one of the mounting shafts 14 is connected to a turntable 25. Specifically, a limiting cylinder 27 is provided on one side of the turntable 25, and the limiting cylinder 27 is fixedly connected to the mounting shaft 14. The turntable 25 is rotatably arranged on the inner wall of the air supply cylinder 2. An air extraction 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, and the air inlet pipe 23 extends into the air supply cylinder 2. A ring groove 26 is provided on one side of the turntable 25. The ring 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 communicating with the air inlet pipe 23 is provided at the end of the slider 24. The slider 24 is slidably arranged in the ring groove 26. A number of external air pipes 13 communicating with the ring groove 26 are evenly distributed on the outer circumference of the turntable 25. The external air pipes 13 extend along the length direction of the cylinder body 1 and are communicated with the corresponding filter discs 12. The air supply cylinder 2 is fixed on the upper side of the slurry tank 3, and the air inlet pipe 23 is arranged on the side where the scraping box 31 is located.

[0039] In this structure, with the air supply cylinder 2 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 for air intake, the rest of the external air pipes 13 are for air extraction. In this way, vacuum filtration of the filter disc 12 can be realized, filtration by suction in the slurry can be achieved, and dehydration by suction above the slurry can be realized. When the filter disc 12 rotates to the position of the scraping box 31, the external air pipe 13 corresponding to this filter disc 12 is communicated with the air inlet pipe 23, so as to supply air for purging, and the filter cake on the filter disc 12 is blown off externally, and it is easy to discharge the material in cooperation with the scraping box 31. Moreover, since the slider 24 has a certain length, within a certain rotation angle, the slider 24 is always communicated with the external air pipe 13, ensuring continuous purging within a certain rotation time of the filter disc 12. For example, in the present invention, the annular filter disc 12 is composed of 12 sector-shaped filter discs 12. Then, the rotation angle required for each filter disc 12 to be scraped 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 being unloaded is always communicated with the slider 24 for purging.

[0040] Further, a first mounting groove 41 is provided on the bottom side of the support base 4. First positioning rings 34 and second positioning rings 35 are respectively provided on both sides of the upper end of the slurry tank 3. One of the mounting shafts 14 is connected and driven to the output shaft 91 of the driving motor 9. The output shaft 91 of the driving motor 9 is rotatably arranged in the second positioning ring 35. The air supply cylinder 2 is fixedly arranged in the first positioning ring 34. The first positioning ring 34 and the second positioning ring 35 are arranged in the first mounting groove 41. The filter disc 12 is controlled to rotate by the driving motor 9. The driving motor 9 is fixedly arranged on the motor base 33, and the motor base 33 is fixedly arranged on the outer wall of one side of the slurry tank 3.

[0041] Further, the support base 4 is arranged in an inverted T shape. A second mounting groove 44 and a third mounting groove 42 are successively formed in the support base 4 from top to bottom. The second mounting groove 44 is arranged on one side of the column 43. The swing rod 5 is arranged in the second mounting groove 44 and the third mounting groove 42 to limit the swing of the swing rod 5.

[0042] Embodiment 5 A desulfurization method for natural gas treatment includes the following steps: Inject sulfur slurry into the slurry tank 3, drive the swing rod 5 to swing the stirring claw into the filtration chamber 3a, and at the same time start the air extraction device to create a vacuum in the filter disc 12 for filtration to form a filter cake on the filter disc 12. During filtration, reciprocally drive the swing rod 5 to swing in the filtration chamber 3a to drive the stirring claw assembly 61 to stir the slurry between the filter discs 12.

[0043] After filtration is completed, control the rotation of the filter disc 12 so that the filter cake adsorbed on the filter disc 12 rotates to the scraping box 31 for scraping. At the same time, the air inlet pipe 23 supplies air to blow and clean the scraped filter disc 12. When it is necessary to replace or repair the stirring claw assembly 61, adjust the length of the connecting rod assembly, drive the swing rod 5 to move the stirring claw away from the filter disc 12 and swing it into the maintenance chamber 3c.

[0044] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

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

2. The desulfurization device for natural gas processing according to claim 1, characterized in that: The mixer comprises a connecting rod assembly with a retractable length adjustment, a mixing motor, a driving shaft, a bearing seat and a crank. A support plate is arranged 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 sides of the driving shaft are rotatably arranged on the bearing seats, and a stirring motor is arranged 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.

3. The desulfurization device for natural gas processing according to claim 2, characterized in that: The connecting rod assembly includes connecting rod one and connecting rod two, one end of connecting rod one is hinged to the rocker arm, connecting rod two is slidably arranged on the inner wall of connecting rod one, and one end of connecting rod two is hinged to the crank; a hydraulic cylinder is arranged on connecting rod one, and the piston rod of the hydraulic cylinder is connected to connecting rod two.

4. The desulfurization device for natural gas processing according to claim 2, 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.

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

6. The desulfurization device for natural gas processing according to claim 5, 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.

7. The desulfurization device for natural gas processing according to claim 1, 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 the filter disc is detachably connected to two adjacent positioning blocks; A turntable is connected to the end of one of the mounting shafts, and the turntable is rotatably arranged on the inner wall of the air supply cylinder; an exhaust pipe and a positioning pipe are arranged at one end of the air supply cylinder, and an air intake pipe is arranged on the inner wall of the positioning pipe, and the air intake pipe extends into the air supply cylinder; an annular groove is arranged on one side of the turntable, and an arc-shaped slider is arranged at the end of the air intake pipe, and a through hole connected to the air intake pipe is arranged at the end of the slider, and the slider is slidably arranged in the annular groove; a plurality of external air pipes connected to the annular groove are evenly arranged on the outer circumference of the turntable, and the external air pipes extend along the length direction of the cylinder body 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 arranged on the side where the scraper box is located.

8. The desulfurization device for natural gas processing according to claim 7, 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, wherein one mounting shaft is connected to the output shaft of the driving motor for transmission, and the output shaft is rotatably arranged in the second positioning ring, and 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.

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

10. A method for desulfurization using the desulfurization device for natural gas processing according to any one of claims 1 to 9, comprising the following steps: Sulfur slurry is introduced into the slurry box, the swing rod is driven to swing the stirring claw into the filter chamber, and the vacuum device is started at the same time 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 rod is reciprocatingly driven to swing in the filter chamber, driving the stirring claw assembly to stir; After the filtration is completed, the filter disc is controlled to rotate so that the filter cake adsorbed on the filter disc rotates to the scraper box for scraping. At the same time, the air supply from the air inlet pipe is used to back-blow and clean the scraped filter disc. When the stirring claw assembly needs to be replaced or overhauled, 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 overhaul chamber.

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