A dry candle filter

Abstract

This invention relates to the field of rich liquid filtration technology, specifically disclosing a dry-discharge candle-type filter, including a filter tank. A drive mechanism is fixedly installed on the top of the filter tank, and a transmission mechanism is provided at the upper interior of the filter tank. The output end of the drive mechanism is connected to the bottom of the transmission mechanism. A filter mechanism is provided inside the filter tank, and a brushing mechanism is provided on the inner side of the filter mechanism. A backwashing mechanism is provided on the outer side of the filter mechanism inside the filter tank. During the application of this technical solution, by setting the drive mechanism to synchronously link the brushing mechanism and the backwashing mechanism, the filter media is cleaned simultaneously inside and out. This can shorten the filter cleaning time, reduce the investment of additional power equipment, improve the completeness of impurity removal on the filter media surface, reduce various subsequent operation expenses caused by the continuous accumulation of impurities, and effectively improve the filtration efficiency of this equipment.

Description

Technical Field

[0001] This invention relates to the field of rich liquid filtration technology, and in particular to a dry-exhaust candle filter. Background Technology

[0002] Refinery processes such as delayed coking, hydrotreating, and catalytic cracking continuously generate process tail gas containing hydrogen sulfide. The industry generally uses 30-40 wt% MDEA amine liquid as an absorbent to capture hydrogen sulfide in the tail gas. After absorbing sulfides, the amine liquid forms a rich liquid, which is then transported to a solvent regeneration unit to remove hydrogen sulfide and obtain a recyclable lean liquid. During long-term operation of the entire amine liquid circulation system, coke powder, catalyst powder, and rust from pipeline corrosion carried by the feed gas will continuously accumulate inside the rich liquid. Suspended solid impurities will clog the regeneration tower trays and reboiler tube bundles, and may also cause amine liquid foaming and escape. Therefore, it is necessary to install filtration equipment to continuously remove solid impurities from the rich liquid to ensure the long-term stable and continuous operation of the desulfurization and solvent regeneration units.

[0003] Currently, the industry mainly relies on bag filters and conventional metal filter cartridge self-cleaning filters to handle rich liquid impurities and complete solid-phase separation. These devices use filter bags and metal mesh as interception media and rely on the pressure difference on both sides of the medium to trigger the flushing process. They can only rely on simple fluid to flush the impurities on the surface of the filter cartridge. During equipment operation, operators need to arrange to switch the equipment regularly and manually disassemble the equipment to replace filter bags or clean the filter cartridge. The slag liquid mixed with high concentrations of coke powder and rust generated during flushing has no supporting concentration and drying treatment unit. It is simply collected and directly returned to the front-end process pipeline. The entire filtration process does not form a closed-loop material recovery structure.

[0004] The rich liquor produced by the delayed coking unit contains a large amount of sticky coke powder. Impurities easily form a dense filter cake on the surface of the filter media. Conventional filters cannot completely remove the filter cake by relying solely on fluid flushing. The filter element clogs quickly, and the equipment pressure difference frequently exceeds the limit. Frequent manual disassembly and replacement of filter media will expose operators to hydrogen sulfide-containing media for a long time, posing a safety hazard of poisoning and asphyxiation. The replaced waste filter bags are hazardous waste, continuously increasing the cost of hazardous waste disposal. Undried slag liquid flowing back into the system will release solid impurities again, forming a cycle of pollution and continuously aggravating the clogging problems of downstream towers and heat exchangers. At the same time, frequent start-ups, shutdowns, and filter switching will cause large fluctuations in pipeline flow, interfering with the stable operation of the desulfurization unit. The overall equipment has high consumable consumption and high manual maintenance costs, making it impossible to achieve closed, automated, and continuous filtration operations with zero liquid phase loss. Summary of the Invention

[0005] The purpose of this invention is to provide a dry-exhaust candle filter to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a dry-type filter, comprising a filter tank, a drive mechanism fixedly installed on the top of the filter tank, a transmission mechanism provided at the upper interior of the filter tank, the output end of the drive mechanism being connected to the bottom of the transmission mechanism, a filter mechanism provided inside the filter tank, a brushing mechanism provided on the inner side of the filter mechanism, a backwashing mechanism provided inside the filter tank on the outer side of the filter mechanism, and a drain valve fixedly installed at the bottom output end of the filter tank.

[0007] The filtration mechanism includes an upper sealing plate and a lower sealing plate, which are installed at the upper end of the filter tank, forming a sealed cavity between them. A guide hopper is fixedly installed in the middle of the upper sealing plate, and connecting sleeves are fixedly installed in a ring at equal intervals at the bottom output end of the guide hopper. A long cylindrical filter screen is fixedly installed through the lower sealing plate at the bottom end of the connecting sleeve, and a conical filter screen is fixedly installed at the bottom of the long cylindrical filter screen. A slag discharge valve is fixedly installed at the bottom output end of the conical filter screen.

[0008] Furthermore, a feed pipe is fixedly installed at the top input end of the filter tank, and a connecting flange is fixedly installed at the outer end of the feed pipe. The brushing mechanism is located inside the long cylindrical filter screen and the conical filter screen, and the backwashing mechanism is located outside the long cylindrical filter screen and the conical filter screen.

[0009] Furthermore, the drive mechanism includes a top plate, which is fixedly installed on the top of the filter tank. A fixed arm is fixedly installed on one side of the top of the top plate, and a gearbox is fixedly installed on the top of the fixed arm. A drive motor is fixedly installed on one side of the top of the gearbox, and the output end of the drive motor drives the transmission mechanism to run through the gearbox.

[0010] Furthermore, the transmission mechanism includes a groove and a lower linkage module. The groove is opened inside the top plate, and the lower linkage module is movably installed in the sealed cavity formed by the upper sealing plate and the lower sealing plate. The upper linkage module is provided inside the groove, and the output end of the drive motor drives the upper linkage module through a gearbox.

[0011] Furthermore, the upper linkage module includes an upper drive gear and an upper transmission gear. The upper drive gear is rotatably connected to the middle of the groove, and the upper transmission gear is rotatably connected to the edge of the groove in a ring with equal spacing. The upper drive gear and the upper transmission gear are meshed together. The bottom of the upper transmission gear is connected to the top of the brushing mechanism through a coupling. The output end of the drive motor drives the upper drive gear to rotate through a gearbox.

[0012] Furthermore, the brushing mechanism includes a main shaft and side shafts. The side shafts are rotatably connected to the inside of the connecting sleeve in a ring with equal spacing. The main shaft is rotatably connected to the middle of the lower sealing plate. Cleaning brush plates are fixedly installed on the outer surface of the side shafts in a ring with equal spacing. The brushing surface of the cleaning brush plates is in contact with the inner wall of the long cylindrical filter screen. The bottom end of the main shaft penetrates the conical filter screen and extends into it. The top of the main shaft is connected to the bottom of the upper drive gear through a coupling. The top of the side shaft is connected to the bottom of the upper driven gear through a coupling.

[0013] Furthermore, cleaning scrapers are fixedly installed on the outer surface of the end of the main shaft located inside the conical filter screen in a ring-shaped arrangement at equal intervals, and the outer scraping surface of the cleaning scrapers is in contact with the inner wall of the conical filter screen.

[0014] Furthermore, the lower linkage module includes a lower drive gear, a sliding ring, and an annular rail. The annular rail is fixedly installed at the bottom of the upper sealing plate in a ring-shaped arrangement with equal intervals. A transmission gear ring is rotatably connected to the outer side of the annular rail. The lower drive gear is rotatably connected to the bottom of the upper sealing plate. The lower drive gear and the transmission gear ring are meshed together. A connecting rod is fixedly installed at the bottom of the lower drive gear in a ring-shaped arrangement with equal intervals. The sliding ring is rotatably connected to the lower sealing plate in a ring-shaped arrangement with equal intervals. The bottom of the connecting rod is connected to the top of the lower sealing plate. The lower drive gear is connected to the main shaft. The transmission gear ring and the lower drive gear are meshed together. The bottom of the sliding ring is connected to the backwashing mechanism.

[0015] Furthermore, the backwashing mechanism includes a delivery pump, a high-pressure resistant connecting hose, and an annular pipe. The delivery pump is fixedly installed on one side of the filter tank, the annular pipe is fixedly installed on the upper outer surface of the filter tank, and the high-pressure resistant connecting hose is fixedly installed in a ring at equal intervals along the upper inner edge of the filter tank. The output end of the annular pipe is connected to the input end of the high-pressure resistant connecting hose. An arc-shaped seat is fixedly installed at the output end of the high-pressure resistant connecting hose, and the arc-shaped seat is fixedly installed at the bottom of the sliding ring. A backwashing pipe is fixedly connected to the bottom of the arc-shaped seat. High-pressure backwashing nozzles are fixedly installed in a linear arrangement at equal intervals on the side of the backwashing pipe near the long cylindrical filter screen. The output end of the delivery pump is connected to the high-pressure resistant connecting hose, and the output end of the delivery pump is also provided with a connecting flange.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] Firstly, in this invention, during the application of this technical solution, the backwashing mechanism is set up to operate synchronously with the brushing mechanism. This allows the brush to clean the inner wall of the long cylindrical filter screen while the high-pressure backwash nozzles circulate and flush the outer wall of the long cylindrical filter screen. The conical filter screen, together with the cleaning scraper, simultaneously collects and washes away impurities, thereby reducing the amount of various solid impurities remaining in the pores and surface of the filter media. The backwashing operation uses the filtered clean rich liquid, without the need to introduce external clean water media, and does not change the composition of the rich liquid itself. The washed-away impurities are uniformly collected at the bottom of the conical filter screen and can be centrally discharged later, reducing the interference of impurity residue on the filtration process.

[0018] Secondly, in this invention, during the application of this technical solution, by setting up a drive mechanism to link the upper linkage module and the lower linkage module, the brushing mechanism and the backwashing mechanism can be driven synchronously by a single drive motor during use. There is no need to configure two separate sets of independent power equipment, thereby reducing the procurement and maintenance expenses of the power components of the entire set of equipment. The simultaneous operation of the two cleaning actions can shorten the time consumed by a single filter cleaning. There is no need to arrange separate time periods for inner wall scraping or outer wall rinsing operations, reducing the time when the equipment stops filtering materials due to cleaning operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure viewed from below in this invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the tank in this invention;

[0022] Figure 4 This is a top view of the structure in the unpacked state of this invention;

[0023] Figure 5 This is a schematic diagram of the split-state structure viewed from below in this invention;

[0024] Figure 6 This is a bottom view schematic diagram of the filtration mechanism and backwashing mechanism in this invention;

[0025] Figure 7 This is a bottom view of the filter mechanism in this invention.

[0026] Figure 8 This is a schematic diagram of the backwashing mechanism in this invention;

[0027] Figure 9 This is a schematic diagram of the lower linkage module structure in this invention.

[0028] In the diagram: 1. Filter tank; 2. Drive mechanism; 21. Top plate; 22. Fixed arm; 23. Gearbox; 24. Drive motor; 3. Transmission mechanism; 31. Tank; 32. Lower linkage module; 321. Lower drive gear; 322. Sliding ring; 323. Annular rail; 324. Transmission gear ring; 325. Connecting rod; 33. Upper linkage module; 331. Upper drive gear; 332. Upper transmission gear; 4. Filter mechanism; 41. Upper sealing plate ; 42. Lower sealing plate; 43. Guide hopper; 44. Connecting sleeve; 45. Long cylindrical filter screen; 46. Conical filter screen; 47. Slag discharge valve; 5. Feed pipe; 6. Backwashing mechanism; 61. Conveying pump; 62. High-pressure resistant connecting hose; 63. Ring pipe; 64. Arc seat; 65. Backwashing pipe; 66. High-pressure backwashing nozzle; 7. Brushing mechanism; 71. Main shaft; 72. Side shaft; 73. Cleaning brush; 74. Cleaning scraper; 8. Drain valve. Detailed Implementation

[0029] Example

[0030] Please see Figures 1-9 In this embodiment of the invention, a dry-type filter includes a filter tank 1, a drive mechanism 2 fixedly installed on the top of the filter tank 1, a transmission mechanism 3 provided at the upper end of the interior of the filter tank 1, the output end of the drive mechanism 2 being connected to the bottom of the transmission mechanism 3, a filter mechanism 4 provided inside the filter tank 1, a brushing mechanism 7 provided on the inner side of the filter mechanism 4, a backwashing mechanism 6 provided on the outer side of the filter mechanism 4 inside the filter tank 1, and a drain valve 8 fixedly installed at the output end on one side of the bottom of the filter tank 1.

[0031] The filtration mechanism 4 includes an upper sealing plate 41 and a lower sealing plate 42, which are installed at the upper end of the filter tank, forming a sealed cavity. A guide hopper 43 is fixedly installed in the middle of the upper sealing plate 41. A connecting sleeve 44 is fixedly installed in a ring at equal intervals at the bottom output end of the guide hopper 43. A long cylindrical filter screen 45 is fixedly installed through the lower sealing plate 42 at the bottom end of the connecting sleeve 44. A conical filter screen 46 is fixedly installed at the bottom of the long cylindrical filter screen 45. A discharge valve 47 is fixedly installed at the bottom output end of the conical filter screen 46. A drive mechanism 2, in conjunction with a transmission mechanism 3, synchronously drives the brushing mechanism 7 and the backwashing mechanism 6 to perform operations. After the rich liquid enters the filter tank 1, it is diverted through the guide bucket 43 into various connecting sleeves 44, and then flows into the elongated cylindrical filter screen 45 to complete solid-liquid separation with the conical filter screen 46. Solid impurities remain on the outer wall of the filter media. The filtered clean liquid is discharged through the discharge valve 8. Impurities adhering to the inner wall of the filter media are continuously scraped off by the brushing mechanism 7. Impurities adhering to the filter wall are continuously flushed by the backwashing mechanism 6. Impurities accumulated on the surface of the cone-shaped filter screen 46 will collect at the bottom along the cone surface, waiting to be discharged outward by opening the slag discharge valve 47. The upper sealing plate 41 and the lower sealing plate 42 form a sealed cavity, which can separate the flowing rich liquid from the transmission-related components, so that the rich liquid will not directly contact the internal components of the transmission mechanism 3, which can reduce the erosion and wear of the transmission components by the medium. The single drive mechanism 2 can simultaneously supply the power required for the operation of the brushing mechanism 7 and the backwashing mechanism 6, which can save the operation of configuring power components for the two types of cleaning structures separately, and can reduce the purchase and daily maintenance expenses of the matching power components. Impurities are cleaned simultaneously inside and outside the filter media, which can reduce the situation of impurities adhering to and clogging the filter media channels for a long time, and can reduce the frequency of equipment shutdown for cleaning. The liquid produced by filtration and the slag produced by rinsing are discharged through the liquid discharge valve 8 and the slag discharge valve 47, which can prevent unfiltered solid impurities from mixing into the clean rich liquid, and can maintain the stability of the impurity content inside the rich liquid being transported outward.

[0032] Please see Figures 1-7A feed pipe 5 is fixedly installed at the top input end of the filter tank 1, and a connecting flange is fixedly installed at the outer end of the feed pipe 5. A brushing mechanism 7 is located inside the elongated cylindrical filter screen 45 and the conical filter screen 46, and a backwashing mechanism 6 is located outside the elongated cylindrical filter screen 45 and the conical filter screen 46. The drive mechanism 2 includes a top plate 21, which is fixedly installed on the top of the filter tank 1. A fixing arm 22 is fixedly installed on one side of the top of the top plate 21, and a gearbox 23 is fixedly installed on the top of the fixing arm 22. A drive motor is fixedly installed on one side of the top of the gearbox 23. 24. The output of the drive motor 24 drives the transmission mechanism 3 through the gearbox 23. The transmission mechanism 3 includes a tank 31 and a lower linkage module 32. The tank 31 is located inside the top plate 21. The lower linkage module 32 is movably installed in the sealed cavity formed by the upper sealing plate 41 and the lower sealing plate 42. The upper linkage module 33 is located inside the tank 31. The output of the drive motor 24 drives the upper linkage module 33 through the gearbox 23. By setting the feed pipe 5 and connecting the flange to the front material conveying pipeline, the rich liquid can be smoothly introduced into the filter tank 1. The drive motor 24 outputs power, which is then converted into torque by the gearbox 23 and transmitted to the upper linkage module 33 inside the tank 31. The upper linkage module 33 then drives the lower linkage module 32 to operate synchronously. The lower linkage module 32 is installed inside the sealed cavity formed by the upper sealing plate 41 and the lower sealing plate 42. The flowing rich liquid will not come into contact with the lower linkage module 32, which can reduce the wear and tear on the transmission components caused by corrosive media. The transmission mechanism 3 synchronously drives the inner brushing mechanism 7 and the outer backwashing mechanism 6 to operate synchronously. The brushing mechanism 7 continuously processes the long cylindrical filter screen 45. Fine impurities adhering to the inner wall of the cone-shaped filter screen 46 are continuously flushed by the backwashing mechanism 6, which continuously washes the filter cake accumulated on the outer wall of both types of filter screens. This simultaneous cleaning of impurities on the surface of the filter media reduces the narrowing of the flow channel caused by impurities embedding into the pores of the filter media. The top plate 21 and the fixed arm 22 work together to support the gearbox 23 and the drive motor 24, which can stably constrain the operating position of the power components. A single drive motor 24 can provide power to both cleaning structures at the same time, saving the investment in additional power equipment and reducing the workload of power component maintenance during daily operation and maintenance.

[0033] Please see Figures 3-7The upper linkage module 33 includes an upper drive gear 331 and an upper transmission gear 332. The upper drive gear 331 is rotatably connected to the middle of the groove 31, and the upper transmission gear 332 is rotatably connected to the inner edge of the groove 31 in a ring with equal spacing. The upper drive gear 331 and the upper transmission gear 332 are meshed together. The bottom of the upper transmission gear 332 is connected to the top of the brushing mechanism 7 through a coupling. The output end of the drive motor 24 drives the upper drive gear 331 to rotate through the gearbox 23. The brushing mechanism 7 includes a main shaft 71 and a side shaft 72. The side shafts 72 are rotatably connected to the inside of the connecting sleeve 44 in a ring with equal spacing. The main shaft 71 is rotatably connected to the middle of the lower sealing plate 42. Cleaning brushes 73 are fixedly installed in a ring at equal intervals on the outer surface of the side shaft 72. The brushing surfaces of the cleaning brushes 73 are in contact with the inner wall of the long cylindrical filter screen 45. The bottom end of the main shaft 71 penetrates the conical filter screen 46 and extends inside it. The top of the main shaft 71 is connected to the bottom of the upper drive gear 331 via a coupling. The top of the side shaft 72 is connected to the bottom of the upper driven gear via a coupling. Cleaning scrapers 74 are fixedly installed in a ring at equal intervals on the outer surface of the end of the main shaft 71 located inside the conical filter screen 46. The outer scraping surfaces of the cleaning scrapers 74 are in contact with the conical filter screen 46. The inner wall of the cylindrical filter screen 46 is powered by an upper drive gear 331 meshing with multiple sets of upper transmission gears 332. The power output from the drive motor 24 is transmitted to the upper drive gear 331 via the gearbox 23, which can synchronously drive all the upper transmission gears 332 to rotate. The upper transmission gears 332 are linked to the side shafts 72 inside the brushing mechanism 7 via couplings. The upper drive gear 331 drives the main shaft 71 to rotate synchronously via the couplings. When the side shafts 72 rotate, the cleaning brushes 73 on their surfaces continuously rub against the inner wall of the cylindrical filter screen 45, which can remove sticky fine impurities stuck in the filter screen pores. The main shaft 71... The section extending into the conical filter 46 drives the cleaning scraper 74 to continuously scrape against the inner wall of the conical filter 46, which can prevent impurities from sticking to the inner wall of the conical filter 46 and failing to collect downwards. Multiple sets of upper drive gears 332 synchronously distribute power so that each set of side shafts 72 can maintain the same rotation speed, which can make the inner wall of the entire cylindrical filter 45 evenly cleaned. The entire power distribution structure relies on a single drive source to realize the synchronous operation of multiple sets of cleaning components. It can eliminate the need to configure a separate power equipment for each set of brushing components, reduce the number of supporting components in the whole equipment, and reduce the cost of component replacement and daily maintenance.

[0034] Please see Figures 3-8The lower linkage module 32 includes a lower drive gear 321, a sliding ring 322, and an annular rail 323. The annular rail 323 is fixedly installed at the bottom of the upper sealing plate 41 with equal intervals arranged in a ring. A transmission gear ring 324 is rotatably connected to the outer side of the annular rail 323. The lower drive gear 321 is rotatably connected to the bottom of the upper sealing plate 41, and the lower drive gear 321 and the transmission gear ring 324 are meshed together. A connecting rod 325 is fixedly installed at the bottom of the lower drive gear 321 with equal intervals arranged in a ring. The sliding ring 322 is rotatably connected to the lower sealing plate 42 with equal intervals arranged in a ring. The bottom of the connecting rod 325 is connected to the top of the lower sealing plate 42. The lower drive gear 321 is connected to the main shaft 71. The transmission gear ring 324 and the lower drive gear 321 are connected together. The bottom of the sliding ring 322 is connected to the backwashing mechanism 6 via a meshing connection. The backwashing mechanism 6 includes a delivery pump 61, a high-pressure resistant connecting hose 62, and an annular pipe 63. The delivery pump 61 is fixedly installed on one side of the filter tank 1. The annular pipe 63 is fixedly installed on the upper outer surface of the filter tank 1. The high-pressure resistant connecting hose 62 is arranged in a ring at equal intervals and fixedly installed on the upper edge of the inside of the filter tank 1. The output end of the annular pipe 63 is connected to the input end of the high-pressure resistant connecting hose 62. An arc-shaped seat 64 is fixedly installed on the output end of the high-pressure resistant connecting hose 62. The arc-shaped seat 64 is fixedly installed on the bottom of the sliding ring 322. A backwashing pipe 65 is fixedly connected to the bottom of the arc-shaped seat 64. The backwashing pipe 65 is arranged at equal intervals on the side near the elongated cylindrical filter screen 45. High-pressure backwash nozzles 66 are fixedly installed in a linear arrangement. The output end of the delivery pump 61 is connected to the high-pressure resistant connecting hose 62. The output end of the delivery pump 61 is also equipped with a connecting flange. The main shaft 71 drives the lower drive gear 321 to rotate synchronously. The lower drive gear 321 meshes with the transmission gear ring 324 to move in a circular motion along the annular rail 323. The transmission gear ring 324 drives the sliding ring 322 to move synchronously with the connecting rod 325. The bottom of the sliding ring 322 is equipped with an arc-shaped seat 64 and moves around the outside of the long cylindrical filter screen 45 as a whole with the backwash mechanism 6. The delivery pump 61 is connected to the clean rich liquid pipeline through its own connecting flange. After the medium is sent into the annular pipe 63, it is distributed to each high-pressure resistant connecting hose 62 and then delivered to the backwash pipe 65 for high-pressure backwashing. The flushing nozzle 66 sprays outwards, and the moving nozzle can completely cover the outer wall of the long cylindrical filter screen 45, which can thoroughly flush off the solid filter cake accumulated on the surface of the filter material. The lower linkage module 32 is arranged inside the sealed cavity formed by the upper sealing plate 41 and the lower sealing plate 42. The flowing material will not come into contact with gear-like transmission components, which can reduce the wear and tear on the transmission components caused by the corrosive components inside the rich liquid. The brushing mechanism 7 and the backwashing mechanism 6 operate synchronously with the same drive source, which can simultaneously complete the scraping of the inner wall of the filter screen and the flushing of the outer wall with fluid, which can reduce the situation of impurities clogging the filter material channel. The delivery pump 61 uses the system's own clean rich liquid as the flushing medium, without the need to introduce external clean water, which can prevent the foreign medium from mixing into the rich liquid and changing the material composition.

[0035] The working principle of this invention is as follows: the rich liquid material enters the internal space of the filter tank 1 through the internal channel of the feed pipe 5. The connecting flange of the feed pipe 5 completes the docking operation with the front-end conveying pipeline. After the material enters the sealed cavity formed by the combination of the upper sealing plate 41 and the lower sealing plate 42, it flows into the guide bucket 43. The guide bucket 43 will evenly distribute the material to each connecting sleeve 44. After passing through the connecting sleeve 44, the material directly enters the internal space of the long cylindrical filter screen 45. The material continues to flow downward inside the long cylindrical filter screen 45 and reaches the internal space of the conical filter screen 46. Solid impurities are intercepted by the outer walls of the long cylindrical filter screen 45 and the conical filter screen 46. The clean rich liquid after removing impurities will pass through the two layers of the long cylindrical filter screen 45 and the conical filter screen 46. The clean rich liquid will converge at the bottom area of ​​the filter tank 1. The operator can open the drain valve 8 to transport the filtered qualified liquid to the downstream production pipeline. The drive motor 24 inside the drive mechanism 2 outputs power, which is transmitted to the top through the gearbox 23. The upper linkage module 33 is set in the inner groove 31 of the disc 21. The upper drive gear 331 rotates with the power. The upper drive gear 331 drives the surrounding meshing upper transmission gear 332 to rotate synchronously. The upper transmission gear 332 drives the side shaft 72 inside the brushing mechanism 7 to rotate through the coupling. When the side shaft 72 rotates, it drives the cleaning brush plate 73 fixed on the surface to continuously contact the inner wall of the long cylindrical filter screen 45 to complete the scraping action. The upper drive gear 331 drives the main shaft 71 inside the brushing mechanism 7 to rotate synchronously through the coupling. During the rotation of the main shaft 71, it drives the lower drive gear 321 inside the lower linkage module 32 to rotate synchronously. The lower drive gear 321 and the transmission gear ring 324 are all arranged inside the sealed cavity formed by the upper sealing plate 41 and the lower sealing plate 42. The material only flows into the long cylindrical filter screen 45 through the connecting sleeve 44 through the sealed cavity. The transmission gear ring 324 will not come into contact with the rich liquid medium, which can reduce the wear of the medium on the transmission components and thus extend the service life of the transmission components.

[0036] The lower drive gear 321 drives the peripherally meshing transmission gear ring 324 to generate circumferential displacement along the annular track 323. The transmission gear ring 324 drives the sliding ring 322 to rotate synchronously through the connecting rod 325. The sliding ring 322 has an overall annular structure and is fitted and sealed on the outside of the connecting sleeve 44. The bottom of the connecting sleeve 44 is connected to the conical filter screen 46. The bottom of the conical filter screen 46 is fixed to the bottom of the filter tank 1. When the sliding ring 322 rotates, the connecting sleeve 44 and the long cylindrical filter screen 45... The conical filter screen 46 does not rotate synchronously. The sliding ring 322 carries the arc-shaped seat 64 and moves in annular motion. As the arc-shaped seat 64 moves with the sliding ring 322, it drives the backwash pipe 65 to move around the outside of the long cylindrical filter screen 45. The high-pressure backwash nozzles 66 arranged on the surface of the backwash pipe 65 complete the annular motion synchronously. After the transfer pump 61 is started, the transfer pump 61 draws the clean rich liquid after filtration as the flushing medium. The medium flows into the annular pipe 63. After media diversion, the media is delivered to multiple high-pressure resistant connecting hoses 62. The media flows through the high-pressure resistant connecting hoses 62 into the arc-shaped seat 64 and then into the backwash pipe 65. The media is continuously sprayed onto the outer wall of the elongated cylindrical filter screen 45 via the high-pressure backwash nozzle 66. The cleaning brush 73 inside the elongated cylindrical filter screen 45 continuously scrapes the inner wall, while the external high-pressure fluid continuously flushes the outer wall. This simultaneous internal and external operation can improve the removal of impurities from the filter screen surface. The impurities washed off by the fluid will flow downwards along the outer wall of the elongated cylindrical filter screen 45. The impurities collected at the conical filter screen 46 are cone-shaped structures. This structure does not undertake the main filtration task. Impurities attached to the outer wall of the conical filter screen 46 will continue to accumulate towards the bottom center along the conical slope. The section of the main shaft 71 that extends into the conical filter screen 46 will drive the cleaning scraper 74 to continuously contact the inner wall of the conical filter screen 46 to complete the scraping action. The cleaning scraper 74 can remove the sticky impurities attached to the inner wall of the conical filter screen 46, preventing impurities from sticking to the inner wall of the conical filter screen 46 and being unable to collect downwards.

[0037] During the filter cleaning operation, the slag discharge valve 47 is not opened directly. All impurities will accumulate at the bottom of the conical filter screen 46 under the combined action of the backwash fluid and the cleaning scraper 74. The slag discharge valve 47 installed at the bottom of the conical filter screen 46 is opened only after the single backwash process is completed. The slag liquid mixed with solid impurities will be transported to the slag liquid collection tank for temporary storage. The conveying pump 61 equipped with the slag liquid collection tank will draw the slag liquid from the tank and transport it to the dry discharge and slag removal mechanism. The nitrogen supply unit continuously supplies high-pressure nitrogen to the conveying pump 61 and the dry discharge and slag removal mechanism for dry discharge and slag removal. The mechanism starts the cleaning branch and introduces lean liquid and deoxygenated water. The two liquids can carry out a circulating washing operation on the filter cake accumulated inside. After the washing process is completed, nitrogen gas will pressurize and recover all the liquid remaining inside the mechanism. Continuous nitrogen gas can dry the amine liquid entrained inside the filter cake. After drying, nitrogen gas enters the mechanism in reverse to purge the filter cake. The filter cake will break and fall off to form solid dry slag. The dry slag falls from the slag discharge port at the bottom of the dry discharge slag removal mechanism into the slag collection tank. The clean rich liquid separated by the dry discharge slag removal mechanism will be transported back to the front-end process pipeline through the clear liquid return outlet.

[0038] This technical solution relies on a single drive mechanism 2 to synchronously drive the internal brushing mechanism 7 and the external backwashing mechanism 6 to operate in conjunction. The internal cleaning brush 73 continuously scrapes the inner wall of the long cylindrical filter screen 45, while the external high-pressure backwash nozzle 66, which can rotate around, continuously washes the outer wall of the long cylindrical filter screen 45. The two sets of cleaning structures work simultaneously to completely remove various attached impurities from the surface of the long cylindrical filter screen 45. The conical filter screen 46, relying on its own conical structure, gathers the dispersed impurities to the bottom slag discharge valve 47, which, together with the cleaning scraper 74 driven by the main shaft 71, cleans the screen simultaneously. Impurities on the inner wall of the cone-shaped filter screen 46 are collected and discharged through the slag discharge valve 47. The entire cleaning process does not require manual disassembly of the equipment; it is all completed automatically by the built-in structure. The lower drive gear 321 and the transmission gear ring 324 are arranged inside the sealed cavity of the isolation medium, preventing the rich liquid from contacting the transmission components and reducing corrosion and wear. During operation, there will be no problem of excessive pressure differential causing shutdown due to filter screen blockage. The entire filter tank 1 can maintain uninterrupted material processing, and no waste filter bags are generated during operation. To reduce hazardous waste treatment costs, the downstream sludge and liquid treatment unit can collect all the sludge and liquid generated during rinsing. After the dry discharge sludge removal mechanism completes the washing and drying of the filter residue, solid impurities are collected separately. The rich liquid after impurity removal is all returned to the process system, and solid impurities will not mix into the rich liquid pipeline again and cause blockage of downstream equipment. The backwashing process uses the system's own clean rich liquid, which does not require the introduction of external clean water media and will not change the original composition of the rich liquid. The nitrogen supply unit delivers nitrogen to the dry discharge sludge removal mechanism to recover the amine liquid entrained in the filter residue, reducing the overall material loss. The upper sealing plate 41 and the lower sealing plate 42 separate independent sealing cavities to achieve uniform material distribution. The single set of long cylindrical filter screen 45 paired with conical filter screen 46 will not interfere with the material processing of other filter screen components when impurities accumulate. The sludge discharge valve 47 and the liquid discharge valve 8 are set with two independent channels to separately transport clean rich liquid and sludge-containing liquid, avoiding unfiltered solid impurities from mixing into the downstream pipeline. The entire set of equipment can be directly connected to the existing rich liquid conveying pipeline without the need for additional high-power conveying equipment, which can reduce the investment cost of equipment modification.

Claims

1. A dry-exhaust candle-type filter, characterized in that, The filter includes a filter tank (1), a drive mechanism (2) is fixedly installed on the top of the filter tank (1), a transmission mechanism (3) is provided at the upper inside of the filter tank (1), the output end of the drive mechanism (2) is connected to the bottom of the transmission mechanism (3), a filter mechanism (4) is provided inside the filter tank (1), a brushing mechanism (7) is provided on the inner side of the filter mechanism (4), a backwashing mechanism (6) is provided inside the filter tank (1) on the outer side of the filter mechanism (4), and a drain valve (8) is fixedly installed on the bottom side of the filter tank (1). The filtration mechanism (4) includes an upper sealing plate (41) and a lower sealing plate (42). The upper sealing plate (41) and the lower sealing plate (42) are installed at the upper end of the filter tank. A sealed cavity is formed between the upper sealing plate (41) and the lower sealing plate (42). A guide bucket (43) is fixedly installed in the middle of the upper sealing plate (41). A connecting sleeve (44) is fixedly installed at equal intervals in a ring at the bottom output end of the guide bucket (43). A long cylindrical filter screen (45) is fixedly installed through the lower sealing plate (42) at the bottom end of the connecting sleeve (44). A conical filter screen (46) is fixedly installed at the bottom of the long cylindrical filter screen (45). A slag discharge valve (47) is fixedly installed at the bottom output end of the conical filter screen (46).

2. A dry-exhaust candle-type filter according to claim 1, characterized in that, A feed pipe (5) is fixedly installed at the top input end of the filter tank (1), and a connecting flange is fixedly installed at the outer end of the feed pipe (5). The brushing mechanism (7) is located inside the long cylindrical filter screen (45) and the conical filter screen (46), and the backwashing mechanism (6) is located outside the long cylindrical filter screen (45) and the conical filter screen (46).

3. A dry-exhaust candle-type filter according to claim 2, characterized in that, The drive mechanism (2) includes a top plate (21), which is fixedly installed on the top of the filter tank (1). A fixed arm (22) is fixedly installed on one side of the top of the top plate (21). A gearbox (23) is fixedly installed on the top of the fixed arm (22). A drive motor (24) is fixedly installed on one side of the top of the gearbox (23). The output end of the drive motor (24) drives the transmission mechanism (3) through the gearbox (23).

4. A dry-exhaust candle-type filter according to claim 3, characterized in that, The transmission mechanism (3) includes a groove (31) and a lower linkage module (32). The groove (31) is opened on the inner side of the top plate (21). The lower linkage module (32) is movably installed in the sealed cavity formed by the upper sealing plate (41) and the lower sealing plate (42). The inner side of the groove (31) is provided with an upper linkage module (33). The output end of the drive motor (24) drives the upper linkage module (33) through the gearbox (23).

5. A dry-exhaust candle-type filter according to claim 4, characterized in that, The upper linkage module (33) includes an upper drive gear (331) and an upper transmission gear (332). The upper drive gear (331) is rotatably connected to the middle of the groove (31). The upper transmission gear (332) is rotatably connected to the inner edge of the groove (31) in a ring with equal spacing. The upper drive gear (331) and the upper transmission gear (332) are meshed. The bottom of the upper transmission gear (332) is connected to the top of the brushing mechanism (7) through a coupling. The output end of the drive motor (24) drives the upper drive gear (331) to rotate through the gearbox (23).

6. A dry-exhaust candle-type filter according to claim 5, characterized in that, The brushing mechanism (7) includes a main shaft (71) and a side shaft (72). The side shafts (72) are rotatably connected to the inside of the connecting sleeve (44) in a ring-shaped arrangement at equal intervals. The main shaft (71) is rotatably connected to the middle of the lower sealing plate (42). The outer surface of the side shaft (72) is fixedly equipped with cleaning brush plates (73) in a ring-shaped arrangement at equal intervals. The brushing surface of the cleaning brush plates (73) is in contact with the inner wall of the long cylindrical filter screen (45). The bottom end of the main shaft (71) penetrates the conical filter screen (46) and extends into it. The top of the main shaft (71) is connected to the bottom of the upper drive gear (331) through a coupling. The top of the side shaft (72) is connected to the bottom of the upper driven gear through a coupling.

7. A dry-exhaust candle-type filter according to claim 6, characterized in that, The outer surface of the end of the main shaft (71) located inside the conical filter (46) is fixedly equipped with cleaning scrapers (74) arranged in a ring at equal intervals. The outer scraping surface of the cleaning scraper (74) is in contact with the inner wall of the conical filter (46).

8. A dry-exhaust candle-type filter according to claim 7, characterized in that, The lower linkage module (32) includes a lower drive gear (321), a sliding ring (322), and an annular rail (323). The annular rail (323) is fixedly installed at the bottom of the upper sealing plate (41) with equal spacing in a ring shape. A transmission gear ring (324) is rotatably connected to the outer side of the annular rail (323). The lower drive gear (321) is rotatably connected to the bottom of the upper sealing plate (41). The lower drive gear (321) and the transmission gear ring (324) are meshed together. (321) has connecting rods (325) fixedly installed at equal intervals in a ring at the bottom. The sliding rings (322) are rotatably connected to the lower sealing plate (42) at equal intervals in a ring. The bottom of the connecting rods (325) is connected to the top of the lower sealing plate (42). The lower drive gear (321) is connected to the main shaft (71). The transmission gear ring (324) is meshed with the lower drive gear (321). The bottom of the sliding ring (322) is connected to the backwashing mechanism (6).

9. A dry-exhaust candle-type filter according to claim 8, characterized in that, The backwashing mechanism (6) includes a delivery pump (61), a high-pressure resistant connecting hose (62), and an annular pipe (63). The delivery pump (61) is fixedly installed on one side of the filter tank (1). The annular pipe (63) is fixedly installed on the upper outer surface of the filter tank (1). The high-pressure resistant connecting hose (62) is arranged in a ring at equal intervals and fixedly installed on the upper inner edge of the filter tank (1). The output end of the annular pipe (63) is connected to the input end of the high-pressure resistant connecting hose (62). An arc-shaped seat (64) is fixedly installed at the output end of the connecting hose (62). The arc-shaped seat (64) is fixedly installed at the bottom of the sliding ring (322). A backwash pipe (65) is fixedly connected to the bottom of the arc-shaped seat (64). A high-pressure backwash nozzle (66) is fixedly installed at equal intervals on the side of the backwash pipe (65) near the long cylindrical filter screen (45). The output end of the delivery pump (61) is connected to the high-pressure resistant connecting hose (62). The output end of the delivery pump (61) is also provided with a connecting flange.

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